reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1 | /* libs/graphics/sgl/SkDraw.cpp |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 8 | ** |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 10 | ** |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include "SkDraw.h" |
| 19 | #include "SkBlitter.h" |
| 20 | #include "SkBounder.h" |
| 21 | #include "SkCanvas.h" |
| 22 | #include "SkColorPriv.h" |
| 23 | #include "SkDevice.h" |
| 24 | #include "SkMaskFilter.h" |
| 25 | #include "SkPaint.h" |
| 26 | #include "SkPathEffect.h" |
| 27 | #include "SkRasterizer.h" |
| 28 | #include "SkScan.h" |
| 29 | #include "SkShader.h" |
| 30 | #include "SkStroke.h" |
| 31 | #include "SkTemplatesPriv.h" |
vandebo@chromium.org | 28be72b | 2010-11-11 21:37:00 +0000 | [diff] [blame] | 32 | #include "SkTextFormatParams.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 33 | #include "SkUtils.h" |
| 34 | |
| 35 | #include "SkAutoKern.h" |
| 36 | #include "SkBitmapProcShader.h" |
| 37 | #include "SkDrawProcs.h" |
| 38 | |
| 39 | //#define TRACE_BITMAP_DRAWS |
| 40 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 41 | #define kBlitterStorageLongCount (sizeof(SkBitmapProcShader) >> 2) |
| 42 | |
reed@google.com | fd4236e | 2011-07-25 21:16:22 +0000 | [diff] [blame^] | 43 | /** Helper for allocating small blitters on the stack. |
| 44 | */ |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 45 | class SkAutoBlitterChoose : SkNoncopyable { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 46 | public: |
reed@google.com | 1d6ee0b | 2011-07-05 17:44:56 +0000 | [diff] [blame] | 47 | SkAutoBlitterChoose() { |
| 48 | fBlitter = NULL; |
| 49 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 50 | SkAutoBlitterChoose(const SkBitmap& device, const SkMatrix& matrix, |
| 51 | const SkPaint& paint) { |
| 52 | fBlitter = SkBlitter::Choose(device, matrix, paint, |
| 53 | fStorage, sizeof(fStorage)); |
| 54 | } |
reed@google.com | 1d6ee0b | 2011-07-05 17:44:56 +0000 | [diff] [blame] | 55 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 56 | ~SkAutoBlitterChoose(); |
| 57 | |
| 58 | SkBlitter* operator->() { return fBlitter; } |
| 59 | SkBlitter* get() const { return fBlitter; } |
| 60 | |
reed@google.com | 1d6ee0b | 2011-07-05 17:44:56 +0000 | [diff] [blame] | 61 | void choose(const SkBitmap& device, const SkMatrix& matrix, |
| 62 | const SkPaint& paint) { |
| 63 | SkASSERT(!fBlitter); |
| 64 | fBlitter = SkBlitter::Choose(device, matrix, paint, |
| 65 | fStorage, sizeof(fStorage)); |
| 66 | } |
| 67 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 68 | private: |
| 69 | SkBlitter* fBlitter; |
| 70 | uint32_t fStorage[kBlitterStorageLongCount]; |
| 71 | }; |
| 72 | |
| 73 | SkAutoBlitterChoose::~SkAutoBlitterChoose() { |
| 74 | if ((void*)fBlitter == (void*)fStorage) { |
| 75 | fBlitter->~SkBlitter(); |
| 76 | } else { |
| 77 | SkDELETE(fBlitter); |
| 78 | } |
| 79 | } |
| 80 | |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 81 | /** |
| 82 | * Since we are providing the storage for the shader (to avoid the perf cost |
| 83 | * of calling new) we insist that in our destructor we can account for all |
| 84 | * owners of the shader. |
| 85 | */ |
| 86 | class SkAutoBitmapShaderInstall : SkNoncopyable { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 87 | public: |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 88 | SkAutoBitmapShaderInstall(const SkBitmap& src, const SkPaint& paint) |
| 89 | : fPaint(paint) /* makes a copy of the paint */ { |
| 90 | fPaint.setShader(SkShader::CreateBitmapShader(src, |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 91 | SkShader::kClamp_TileMode, SkShader::kClamp_TileMode, |
| 92 | fStorage, sizeof(fStorage))); |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 93 | // we deliberately left the shader with an owner-count of 2 |
| 94 | SkASSERT(2 == fPaint.getShader()->getRefCnt()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 95 | } |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 96 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 97 | ~SkAutoBitmapShaderInstall() { |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 98 | SkShader* shader = fPaint.getShader(); |
| 99 | // since we manually destroy shader, we insist that owners == 2 |
| 100 | SkASSERT(2 == shader->getRefCnt()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 101 | |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 102 | fPaint.setShader(NULL); // unref the shader by 1 |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 103 | |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 104 | // now destroy to take care of the 2nd owner-count |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 105 | if ((void*)shader == (void*)fStorage) { |
| 106 | shader->~SkShader(); |
| 107 | } else { |
| 108 | SkDELETE(shader); |
| 109 | } |
| 110 | } |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 111 | |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 112 | // return the new paint that has the shader applied |
| 113 | const SkPaint& paintWithShader() const { return fPaint; } |
| 114 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 115 | private: |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 116 | SkPaint fPaint; // copy of caller's paint (which we then modify) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 117 | uint32_t fStorage[kBlitterStorageLongCount]; |
| 118 | }; |
| 119 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 120 | /////////////////////////////////////////////////////////////////////////////// |
| 121 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 122 | SkDraw::SkDraw() { |
| 123 | sk_bzero(this, sizeof(*this)); |
| 124 | } |
| 125 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 126 | SkDraw::SkDraw(const SkDraw& src) { |
| 127 | memcpy(this, &src, sizeof(*this)); |
| 128 | } |
| 129 | |
| 130 | /////////////////////////////////////////////////////////////////////////////// |
| 131 | |
| 132 | typedef void (*BitmapXferProc)(void* pixels, size_t bytes, uint32_t data); |
| 133 | |
| 134 | static void D_Clear_BitmapXferProc(void* pixels, size_t bytes, uint32_t) { |
reed@android.com | 4516f47 | 2009-06-29 16:25:36 +0000 | [diff] [blame] | 135 | sk_bzero(pixels, bytes); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 136 | } |
| 137 | |
| 138 | static void D_Dst_BitmapXferProc(void*, size_t, uint32_t data) {} |
| 139 | |
| 140 | static void D32_Src_BitmapXferProc(void* pixels, size_t bytes, uint32_t data) { |
| 141 | sk_memset32((uint32_t*)pixels, data, bytes >> 2); |
| 142 | } |
| 143 | |
| 144 | static void D16_Src_BitmapXferProc(void* pixels, size_t bytes, uint32_t data) { |
| 145 | sk_memset16((uint16_t*)pixels, data, bytes >> 1); |
| 146 | } |
| 147 | |
| 148 | static void DA8_Src_BitmapXferProc(void* pixels, size_t bytes, uint32_t data) { |
| 149 | memset(pixels, data, bytes); |
| 150 | } |
| 151 | |
| 152 | static BitmapXferProc ChooseBitmapXferProc(const SkBitmap& bitmap, |
| 153 | const SkPaint& paint, |
| 154 | uint32_t* data) { |
| 155 | // todo: we can apply colorfilter up front if no shader, so we wouldn't |
| 156 | // need to abort this fastpath |
| 157 | if (paint.getShader() || paint.getColorFilter()) { |
| 158 | return NULL; |
| 159 | } |
| 160 | |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 161 | SkXfermode::Mode mode; |
| 162 | if (!SkXfermode::IsMode(paint.getXfermode(), &mode)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 163 | return NULL; |
| 164 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 165 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 166 | SkColor color = paint.getColor(); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 167 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 168 | // collaps modes based on color... |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 169 | if (SkXfermode::kSrcOver_Mode == mode) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 170 | unsigned alpha = SkColorGetA(color); |
| 171 | if (0 == alpha) { |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 172 | mode = SkXfermode::kDst_Mode; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 173 | } else if (0xFF == alpha) { |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 174 | mode = SkXfermode::kSrc_Mode; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 175 | } |
| 176 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 177 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 178 | switch (mode) { |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 179 | case SkXfermode::kClear_Mode: |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 180 | // SkDebugf("--- D_Clear_BitmapXferProc\n"); |
| 181 | return D_Clear_BitmapXferProc; // ignore data |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 182 | case SkXfermode::kDst_Mode: |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 183 | // SkDebugf("--- D_Dst_BitmapXferProc\n"); |
| 184 | return D_Dst_BitmapXferProc; // ignore data |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 185 | case SkXfermode::kSrc_Mode: { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 186 | /* |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 187 | should I worry about dithering for the lower depths? |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 188 | */ |
| 189 | SkPMColor pmc = SkPreMultiplyColor(color); |
| 190 | switch (bitmap.config()) { |
| 191 | case SkBitmap::kARGB_8888_Config: |
| 192 | if (data) { |
| 193 | *data = pmc; |
| 194 | } |
| 195 | // SkDebugf("--- D32_Src_BitmapXferProc\n"); |
| 196 | return D32_Src_BitmapXferProc; |
| 197 | case SkBitmap::kARGB_4444_Config: |
| 198 | if (data) { |
| 199 | *data = SkPixel32ToPixel4444(pmc); |
| 200 | } |
| 201 | // SkDebugf("--- D16_Src_BitmapXferProc\n"); |
| 202 | return D16_Src_BitmapXferProc; |
| 203 | case SkBitmap::kRGB_565_Config: |
| 204 | if (data) { |
| 205 | *data = SkPixel32ToPixel16(pmc); |
| 206 | } |
| 207 | // SkDebugf("--- D16_Src_BitmapXferProc\n"); |
| 208 | return D16_Src_BitmapXferProc; |
| 209 | case SkBitmap::kA8_Config: |
| 210 | if (data) { |
| 211 | *data = SkGetPackedA32(pmc); |
| 212 | } |
| 213 | // SkDebugf("--- DA8_Src_BitmapXferProc\n"); |
| 214 | return DA8_Src_BitmapXferProc; |
| 215 | default: |
| 216 | break; |
| 217 | } |
| 218 | break; |
| 219 | } |
| 220 | default: |
| 221 | break; |
| 222 | } |
| 223 | return NULL; |
| 224 | } |
| 225 | |
| 226 | static void CallBitmapXferProc(const SkBitmap& bitmap, const SkIRect& rect, |
| 227 | BitmapXferProc proc, uint32_t procData) { |
| 228 | int shiftPerPixel; |
| 229 | switch (bitmap.config()) { |
| 230 | case SkBitmap::kARGB_8888_Config: |
| 231 | shiftPerPixel = 2; |
| 232 | break; |
| 233 | case SkBitmap::kARGB_4444_Config: |
| 234 | case SkBitmap::kRGB_565_Config: |
| 235 | shiftPerPixel = 1; |
| 236 | break; |
| 237 | case SkBitmap::kA8_Config: |
| 238 | shiftPerPixel = 0; |
| 239 | break; |
| 240 | default: |
| 241 | SkASSERT(!"Can't use xferproc on this config"); |
| 242 | return; |
| 243 | } |
| 244 | |
| 245 | uint8_t* pixels = (uint8_t*)bitmap.getPixels(); |
| 246 | SkASSERT(pixels); |
| 247 | const size_t rowBytes = bitmap.rowBytes(); |
| 248 | const int widthBytes = rect.width() << shiftPerPixel; |
| 249 | |
| 250 | // skip down to the first scanline and X position |
| 251 | pixels += rect.fTop * rowBytes + (rect.fLeft << shiftPerPixel); |
| 252 | for (int scans = rect.height() - 1; scans >= 0; --scans) { |
| 253 | proc(pixels, widthBytes, procData); |
| 254 | pixels += rowBytes; |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | void SkDraw::drawPaint(const SkPaint& paint) const { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 259 | SkDEBUGCODE(this->validate();) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 260 | |
| 261 | if (fClip->isEmpty()) { |
| 262 | return; |
| 263 | } |
| 264 | |
| 265 | SkIRect devRect; |
| 266 | devRect.set(0, 0, fBitmap->width(), fBitmap->height()); |
| 267 | if (fBounder && !fBounder->doIRect(devRect)) { |
| 268 | return; |
| 269 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 270 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 271 | /* If we don't have a shader (i.e. we're just a solid color) we may |
| 272 | be faster to operate directly on the device bitmap, rather than invoking |
| 273 | a blitter. Esp. true for xfermodes, which require a colorshader to be |
| 274 | present, which is just redundant work. Since we're drawing everywhere |
| 275 | in the clip, we don't have to worry about antialiasing. |
| 276 | */ |
| 277 | uint32_t procData = 0; // to avoid the warning |
| 278 | BitmapXferProc proc = ChooseBitmapXferProc(*fBitmap, paint, &procData); |
| 279 | if (proc) { |
| 280 | if (D_Dst_BitmapXferProc == proc) { // nothing to do |
| 281 | return; |
| 282 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 283 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 284 | SkRegion::Iterator iter(*fClip); |
| 285 | while (!iter.done()) { |
| 286 | CallBitmapXferProc(*fBitmap, iter.rect(), proc, procData); |
| 287 | iter.next(); |
| 288 | } |
| 289 | } else { |
| 290 | // normal case: use a blitter |
| 291 | SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, paint); |
| 292 | SkScan::FillIRect(devRect, fClip, blitter.get()); |
| 293 | } |
| 294 | } |
| 295 | |
| 296 | /////////////////////////////////////////////////////////////////////////////// |
| 297 | |
| 298 | struct PtProcRec { |
| 299 | SkCanvas::PointMode fMode; |
| 300 | const SkPaint* fPaint; |
| 301 | const SkRegion* fClip; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 302 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 303 | // computed values |
| 304 | SkFixed fRadius; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 305 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 306 | typedef void (*Proc)(const PtProcRec&, const SkPoint devPts[], int count, |
| 307 | SkBlitter*); |
| 308 | |
| 309 | bool init(SkCanvas::PointMode, const SkPaint&, const SkMatrix* matrix, |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 310 | const SkRegion* clip); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 311 | Proc chooseProc(SkBlitter* blitter); |
| 312 | }; |
| 313 | |
| 314 | static void bw_pt_rect_hair_proc(const PtProcRec& rec, const SkPoint devPts[], |
| 315 | int count, SkBlitter* blitter) { |
| 316 | SkASSERT(rec.fClip->isRect()); |
| 317 | const SkIRect& r = rec.fClip->getBounds(); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 318 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 319 | for (int i = 0; i < count; i++) { |
| 320 | int x = SkScalarFloor(devPts[i].fX); |
| 321 | int y = SkScalarFloor(devPts[i].fY); |
| 322 | if (r.contains(x, y)) { |
| 323 | blitter->blitH(x, y, 1); |
| 324 | } |
| 325 | } |
| 326 | } |
| 327 | |
| 328 | static void bw_pt_rect_16_hair_proc(const PtProcRec& rec, |
| 329 | const SkPoint devPts[], int count, |
| 330 | SkBlitter* blitter) { |
| 331 | SkASSERT(rec.fClip->isRect()); |
| 332 | const SkIRect& r = rec.fClip->getBounds(); |
| 333 | uint32_t value; |
| 334 | const SkBitmap* bitmap = blitter->justAnOpaqueColor(&value); |
| 335 | SkASSERT(bitmap); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 336 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 337 | uint16_t* addr = bitmap->getAddr16(0, 0); |
| 338 | int rb = bitmap->rowBytes(); |
| 339 | |
| 340 | for (int i = 0; i < count; i++) { |
| 341 | int x = SkScalarFloor(devPts[i].fX); |
| 342 | int y = SkScalarFloor(devPts[i].fY); |
| 343 | if (r.contains(x, y)) { |
| 344 | // *bitmap->getAddr16(x, y) = SkToU16(value); |
| 345 | ((uint16_t*)((char*)addr + y * rb))[x] = SkToU16(value); |
| 346 | } |
| 347 | } |
| 348 | } |
| 349 | |
| 350 | static void bw_pt_hair_proc(const PtProcRec& rec, const SkPoint devPts[], |
| 351 | int count, SkBlitter* blitter) { |
| 352 | for (int i = 0; i < count; i++) { |
| 353 | int x = SkScalarFloor(devPts[i].fX); |
| 354 | int y = SkScalarFloor(devPts[i].fY); |
| 355 | if (rec.fClip->contains(x, y)) { |
| 356 | blitter->blitH(x, y, 1); |
| 357 | } |
| 358 | } |
| 359 | } |
| 360 | |
| 361 | static void bw_line_hair_proc(const PtProcRec& rec, const SkPoint devPts[], |
| 362 | int count, SkBlitter* blitter) { |
| 363 | for (int i = 0; i < count; i += 2) { |
| 364 | SkScan::HairLine(devPts[i], devPts[i+1], rec.fClip, blitter); |
| 365 | } |
| 366 | } |
| 367 | |
| 368 | static void bw_poly_hair_proc(const PtProcRec& rec, const SkPoint devPts[], |
| 369 | int count, SkBlitter* blitter) { |
| 370 | for (int i = 0; i < count - 1; i++) { |
| 371 | SkScan::HairLine(devPts[i], devPts[i+1], rec.fClip, blitter); |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | // aa versions |
| 376 | |
| 377 | static void aa_line_hair_proc(const PtProcRec& rec, const SkPoint devPts[], |
| 378 | int count, SkBlitter* blitter) { |
| 379 | for (int i = 0; i < count; i += 2) { |
| 380 | SkScan::AntiHairLine(devPts[i], devPts[i+1], rec.fClip, blitter); |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | static void aa_poly_hair_proc(const PtProcRec& rec, const SkPoint devPts[], |
| 385 | int count, SkBlitter* blitter) { |
| 386 | for (int i = 0; i < count - 1; i++) { |
| 387 | SkScan::AntiHairLine(devPts[i], devPts[i+1], rec.fClip, blitter); |
| 388 | } |
| 389 | } |
| 390 | |
| 391 | // square procs (strokeWidth > 0 but matrix is square-scale (sx == sy) |
| 392 | |
| 393 | static void bw_square_proc(const PtProcRec& rec, const SkPoint devPts[], |
| 394 | int count, SkBlitter* blitter) { |
| 395 | const SkFixed radius = rec.fRadius; |
| 396 | for (int i = 0; i < count; i++) { |
| 397 | SkFixed x = SkScalarToFixed(devPts[i].fX); |
| 398 | SkFixed y = SkScalarToFixed(devPts[i].fY); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 399 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 400 | SkXRect r; |
| 401 | r.fLeft = x - radius; |
| 402 | r.fTop = y - radius; |
| 403 | r.fRight = x + radius; |
| 404 | r.fBottom = y + radius; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 405 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 406 | SkScan::FillXRect(r, rec.fClip, blitter); |
| 407 | } |
| 408 | } |
| 409 | |
| 410 | static void aa_square_proc(const PtProcRec& rec, const SkPoint devPts[], |
| 411 | int count, SkBlitter* blitter) { |
| 412 | const SkFixed radius = rec.fRadius; |
| 413 | for (int i = 0; i < count; i++) { |
| 414 | SkFixed x = SkScalarToFixed(devPts[i].fX); |
| 415 | SkFixed y = SkScalarToFixed(devPts[i].fY); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 416 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 417 | SkXRect r; |
| 418 | r.fLeft = x - radius; |
| 419 | r.fTop = y - radius; |
| 420 | r.fRight = x + radius; |
| 421 | r.fBottom = y + radius; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 422 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 423 | SkScan::AntiFillXRect(r, rec.fClip, blitter); |
| 424 | } |
| 425 | } |
| 426 | |
reed@android.com | b4f404a | 2009-07-10 17:02:17 +0000 | [diff] [blame] | 427 | // If this guy returns true, then chooseProc() must return a valid proc |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 428 | bool PtProcRec::init(SkCanvas::PointMode mode, const SkPaint& paint, |
| 429 | const SkMatrix* matrix, const SkRegion* clip) { |
| 430 | if (paint.getPathEffect()) { |
| 431 | return false; |
| 432 | } |
| 433 | SkScalar width = paint.getStrokeWidth(); |
| 434 | if (0 == width) { |
| 435 | fMode = mode; |
| 436 | fPaint = &paint; |
| 437 | fClip = clip; |
| 438 | fRadius = SK_Fixed1 >> 1; |
| 439 | return true; |
| 440 | } |
reed@android.com | b4f404a | 2009-07-10 17:02:17 +0000 | [diff] [blame] | 441 | if (paint.getStrokeCap() != SkPaint::kRound_Cap && |
| 442 | matrix->rectStaysRect() && SkCanvas::kPoints_PointMode == mode) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 443 | SkScalar sx = matrix->get(SkMatrix::kMScaleX); |
| 444 | SkScalar sy = matrix->get(SkMatrix::kMScaleY); |
| 445 | if (SkScalarNearlyZero(sx - sy)) { |
| 446 | if (sx < 0) { |
| 447 | sx = -sx; |
| 448 | } |
| 449 | |
| 450 | fMode = mode; |
| 451 | fPaint = &paint; |
| 452 | fClip = clip; |
| 453 | fRadius = SkScalarToFixed(SkScalarMul(width, sx)) >> 1; |
| 454 | return true; |
| 455 | } |
| 456 | } |
| 457 | return false; |
| 458 | } |
| 459 | |
| 460 | PtProcRec::Proc PtProcRec::chooseProc(SkBlitter* blitter) { |
reed@android.com | b4f404a | 2009-07-10 17:02:17 +0000 | [diff] [blame] | 461 | Proc proc = NULL; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 462 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 463 | // for our arrays |
| 464 | SkASSERT(0 == SkCanvas::kPoints_PointMode); |
| 465 | SkASSERT(1 == SkCanvas::kLines_PointMode); |
| 466 | SkASSERT(2 == SkCanvas::kPolygon_PointMode); |
| 467 | SkASSERT((unsigned)fMode <= (unsigned)SkCanvas::kPolygon_PointMode); |
| 468 | |
| 469 | // first check for hairlines |
| 470 | if (0 == fPaint->getStrokeWidth()) { |
| 471 | if (fPaint->isAntiAlias()) { |
| 472 | static const Proc gAAProcs[] = { |
| 473 | aa_square_proc, aa_line_hair_proc, aa_poly_hair_proc |
| 474 | }; |
| 475 | proc = gAAProcs[fMode]; |
| 476 | } else { |
| 477 | if (SkCanvas::kPoints_PointMode == fMode && fClip->isRect()) { |
| 478 | uint32_t value; |
| 479 | const SkBitmap* bm = blitter->justAnOpaqueColor(&value); |
| 480 | if (bm && bm->config() == SkBitmap::kRGB_565_Config) { |
| 481 | proc = bw_pt_rect_16_hair_proc; |
| 482 | } else { |
| 483 | proc = bw_pt_rect_hair_proc; |
| 484 | } |
| 485 | } else { |
| 486 | static Proc gBWProcs[] = { |
| 487 | bw_pt_hair_proc, bw_line_hair_proc, bw_poly_hair_proc |
| 488 | }; |
| 489 | proc = gBWProcs[fMode]; |
| 490 | } |
| 491 | } |
reed@android.com | b4f404a | 2009-07-10 17:02:17 +0000 | [diff] [blame] | 492 | } else if (fPaint->getStrokeCap() != SkPaint::kRound_Cap) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 493 | SkASSERT(SkCanvas::kPoints_PointMode == fMode); |
| 494 | if (fPaint->isAntiAlias()) { |
| 495 | proc = aa_square_proc; |
| 496 | } else { |
| 497 | proc = bw_square_proc; |
| 498 | } |
| 499 | } |
| 500 | return proc; |
| 501 | } |
| 502 | |
| 503 | static bool bounder_points(SkBounder* bounder, SkCanvas::PointMode mode, |
| 504 | size_t count, const SkPoint pts[], |
| 505 | const SkPaint& paint, const SkMatrix& matrix) { |
| 506 | SkIRect ibounds; |
| 507 | SkRect bounds; |
| 508 | SkScalar inset = paint.getStrokeWidth(); |
| 509 | |
| 510 | bounds.set(pts, count); |
| 511 | bounds.inset(-inset, -inset); |
| 512 | matrix.mapRect(&bounds); |
| 513 | |
| 514 | bounds.roundOut(&ibounds); |
| 515 | return bounder->doIRect(ibounds); |
| 516 | } |
| 517 | |
| 518 | // each of these costs 8-bytes of stack space, so don't make it too large |
| 519 | // must be even for lines/polygon to work |
| 520 | #define MAX_DEV_PTS 32 |
| 521 | |
| 522 | void SkDraw::drawPoints(SkCanvas::PointMode mode, size_t count, |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 523 | const SkPoint pts[], const SkPaint& paint, |
| 524 | bool forceUseDevice) const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 525 | // if we're in lines mode, force count to be even |
| 526 | if (SkCanvas::kLines_PointMode == mode) { |
| 527 | count &= ~(size_t)1; |
| 528 | } |
| 529 | |
| 530 | if ((long)count <= 0) { |
| 531 | return; |
| 532 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 533 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 534 | SkASSERT(pts != NULL); |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 535 | SkDEBUGCODE(this->validate();) |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 536 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 537 | // nothing to draw |
| 538 | if (fClip->isEmpty() || |
| 539 | (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) { |
| 540 | return; |
| 541 | } |
| 542 | |
reed@google.com | fd4236e | 2011-07-25 21:16:22 +0000 | [diff] [blame^] | 543 | if (fBounder) { |
| 544 | if (!bounder_points(fBounder, mode, count, pts, paint, *fMatrix)) { |
| 545 | return; |
| 546 | } |
| 547 | |
| 548 | // clear the bounder and call this again, so we don't invoke the bounder |
| 549 | // later if we happen to call ourselves for drawRect, drawPath, etc. |
| 550 | SkDraw noBounder(*this); |
| 551 | noBounder.fBounder = NULL; |
| 552 | noBounder.drawPoints(mode, count, pts, paint, forceUseDevice); |
| 553 | return; |
| 554 | } |
| 555 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 556 | PtProcRec rec; |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 557 | if (!forceUseDevice && rec.init(mode, paint, fMatrix, fClip)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 558 | SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, paint); |
| 559 | |
| 560 | SkPoint devPts[MAX_DEV_PTS]; |
| 561 | const SkMatrix* matrix = fMatrix; |
| 562 | SkBlitter* bltr = blitter.get(); |
| 563 | PtProcRec::Proc proc = rec.chooseProc(bltr); |
| 564 | // we have to back up subsequent passes if we're in polygon mode |
| 565 | const size_t backup = (SkCanvas::kPolygon_PointMode == mode); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 566 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 567 | do { |
| 568 | size_t n = count; |
| 569 | if (n > MAX_DEV_PTS) { |
| 570 | n = MAX_DEV_PTS; |
| 571 | } |
| 572 | matrix->mapPoints(devPts, pts, n); |
| 573 | proc(rec, devPts, n, bltr); |
| 574 | pts += n - backup; |
| 575 | SkASSERT(count >= n); |
| 576 | count -= n; |
| 577 | if (count > 0) { |
| 578 | count += backup; |
| 579 | } |
| 580 | } while (count != 0); |
| 581 | } else { |
| 582 | switch (mode) { |
| 583 | case SkCanvas::kPoints_PointMode: { |
| 584 | // temporarily mark the paint as filling. |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 585 | SkPaint newPaint(paint); |
| 586 | newPaint.setStyle(SkPaint::kFill_Style); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 587 | |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 588 | SkScalar width = newPaint.getStrokeWidth(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 589 | SkScalar radius = SkScalarHalf(width); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 590 | |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 591 | if (newPaint.getStrokeCap() == SkPaint::kRound_Cap) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 592 | SkPath path; |
| 593 | SkMatrix preMatrix; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 594 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 595 | path.addCircle(0, 0, radius); |
| 596 | for (size_t i = 0; i < count; i++) { |
| 597 | preMatrix.setTranslate(pts[i].fX, pts[i].fY); |
| 598 | // pass true for the last point, since we can modify |
| 599 | // then path then |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 600 | if (fDevice) { |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 601 | fDevice->drawPath(*this, path, newPaint, &preMatrix, |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 602 | (count-1) == i); |
| 603 | } else { |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 604 | this->drawPath(path, newPaint, &preMatrix, |
| 605 | (count-1) == i); |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 606 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 607 | } |
| 608 | } else { |
| 609 | SkRect r; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 610 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 611 | for (size_t i = 0; i < count; i++) { |
| 612 | r.fLeft = pts[i].fX - radius; |
| 613 | r.fTop = pts[i].fY - radius; |
| 614 | r.fRight = r.fLeft + width; |
| 615 | r.fBottom = r.fTop + width; |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 616 | if (fDevice) { |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 617 | fDevice->drawRect(*this, r, newPaint); |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 618 | } else { |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 619 | this->drawRect(r, newPaint); |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 620 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 621 | } |
| 622 | } |
| 623 | break; |
| 624 | } |
| 625 | case SkCanvas::kLines_PointMode: |
| 626 | case SkCanvas::kPolygon_PointMode: { |
| 627 | count -= 1; |
| 628 | SkPath path; |
| 629 | SkPaint p(paint); |
| 630 | p.setStyle(SkPaint::kStroke_Style); |
| 631 | size_t inc = (SkCanvas::kLines_PointMode == mode) ? 2 : 1; |
| 632 | for (size_t i = 0; i < count; i += inc) { |
| 633 | path.moveTo(pts[i]); |
| 634 | path.lineTo(pts[i+1]); |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 635 | if (fDevice) { |
| 636 | fDevice->drawPath(*this, path, p, NULL, true); |
| 637 | } else { |
| 638 | this->drawPath(path, p, NULL, true); |
| 639 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 640 | path.rewind(); |
| 641 | } |
| 642 | break; |
| 643 | } |
| 644 | } |
| 645 | } |
| 646 | } |
| 647 | |
| 648 | static inline SkPoint* as_lefttop(SkRect* r) { |
| 649 | return (SkPoint*)(void*)r; |
| 650 | } |
| 651 | |
| 652 | static inline SkPoint* as_rightbottom(SkRect* r) { |
| 653 | return ((SkPoint*)(void*)r) + 1; |
| 654 | } |
| 655 | |
reed@google.com | 761fb62 | 2011-04-04 18:58:05 +0000 | [diff] [blame] | 656 | static bool easy_rect_join(const SkPaint& paint, const SkMatrix& matrix, |
| 657 | SkPoint* strokeSize) { |
| 658 | if (SkPaint::kMiter_Join != paint.getStrokeJoin() || |
| 659 | paint.getStrokeMiter() < SK_ScalarSqrt2) { |
| 660 | return false; |
| 661 | } |
reed@google.com | 62ab7ad | 2011-04-05 14:08:25 +0000 | [diff] [blame] | 662 | |
reed@google.com | 761fb62 | 2011-04-04 18:58:05 +0000 | [diff] [blame] | 663 | SkASSERT(matrix.rectStaysRect()); |
| 664 | SkPoint pt = { paint.getStrokeWidth(), paint.getStrokeWidth() }; |
| 665 | matrix.mapVectors(strokeSize, &pt, 1); |
reed@google.com | 6115338 | 2011-04-05 13:05:18 +0000 | [diff] [blame] | 666 | strokeSize->fX = SkScalarAbs(strokeSize->fX); |
| 667 | strokeSize->fY = SkScalarAbs(strokeSize->fY); |
reed@google.com | 761fb62 | 2011-04-04 18:58:05 +0000 | [diff] [blame] | 668 | return true; |
mike@reedtribe.org | 7ff678b | 2011-04-04 14:38:12 +0000 | [diff] [blame] | 669 | } |
| 670 | |
reed@google.com | 62ab7ad | 2011-04-05 14:08:25 +0000 | [diff] [blame] | 671 | SkDraw::RectType SkDraw::ComputeRectType(const SkPaint& paint, |
| 672 | const SkMatrix& matrix, |
| 673 | SkPoint* strokeSize) { |
| 674 | RectType rtype; |
| 675 | const SkScalar width = paint.getStrokeWidth(); |
| 676 | const bool zeroWidth = (0 == width); |
| 677 | SkPaint::Style style = paint.getStyle(); |
| 678 | |
| 679 | if ((SkPaint::kStrokeAndFill_Style == style) && zeroWidth) { |
| 680 | style = SkPaint::kFill_Style; |
| 681 | } |
| 682 | |
| 683 | if (paint.getPathEffect() || paint.getMaskFilter() || |
| 684 | paint.getRasterizer() || !matrix.rectStaysRect() || |
| 685 | SkPaint::kStrokeAndFill_Style == style) { |
| 686 | rtype = kPath_RectType; |
| 687 | } else if (SkPaint::kFill_Style == style) { |
| 688 | rtype = kFill_RectType; |
| 689 | } else if (zeroWidth) { |
| 690 | rtype = kHair_RectType; |
| 691 | } else if (easy_rect_join(paint, matrix, strokeSize)) { |
| 692 | rtype = kStroke_RectType; |
| 693 | } else { |
| 694 | rtype = kPath_RectType; |
| 695 | } |
| 696 | return rtype; |
| 697 | } |
mike@reedtribe.org | 7ff678b | 2011-04-04 14:38:12 +0000 | [diff] [blame] | 698 | |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 699 | static SkPoint* rect_points(SkRect& r, int index) { |
| 700 | SkASSERT((unsigned)index < 2); |
| 701 | return &((SkPoint*)(void*)&r)[index]; |
| 702 | } |
| 703 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 704 | void SkDraw::drawRect(const SkRect& rect, const SkPaint& paint) const { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 705 | SkDEBUGCODE(this->validate();) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 706 | |
| 707 | // nothing to draw |
| 708 | if (fClip->isEmpty() || |
| 709 | (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) { |
| 710 | return; |
| 711 | } |
| 712 | |
reed@google.com | 761fb62 | 2011-04-04 18:58:05 +0000 | [diff] [blame] | 713 | SkPoint strokeSize; |
reed@google.com | 62ab7ad | 2011-04-05 14:08:25 +0000 | [diff] [blame] | 714 | RectType rtype = ComputeRectType(paint, *fMatrix, &strokeSize); |
mike@reedtribe.org | 7ff678b | 2011-04-04 14:38:12 +0000 | [diff] [blame] | 715 | |
reed@google.com | 5bff8d2 | 2011-04-04 14:47:09 +0000 | [diff] [blame] | 716 | #ifdef SK_DISABLE_FAST_AA_STROKE_RECT |
reed@google.com | 62ab7ad | 2011-04-05 14:08:25 +0000 | [diff] [blame] | 717 | if (kStroke_RectType == rtype && paint.isAntiAlias()) { |
mike@reedtribe.org | 7ff678b | 2011-04-04 14:38:12 +0000 | [diff] [blame] | 718 | rtype = kPath_RectType; |
| 719 | } |
reed@google.com | 62ab7ad | 2011-04-05 14:08:25 +0000 | [diff] [blame] | 720 | #endif |
| 721 | |
mike@reedtribe.org | 7ff678b | 2011-04-04 14:38:12 +0000 | [diff] [blame] | 722 | if (kPath_RectType == rtype) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 723 | SkPath tmp; |
| 724 | tmp.addRect(rect); |
| 725 | tmp.setFillType(SkPath::kWinding_FillType); |
reed@android.com | 187d559 | 2009-07-08 14:03:56 +0000 | [diff] [blame] | 726 | this->drawPath(tmp, paint, NULL, true); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 727 | return; |
| 728 | } |
| 729 | |
| 730 | const SkMatrix& matrix = *fMatrix; |
| 731 | SkRect devRect; |
| 732 | |
| 733 | // transform rect into devRect |
| 734 | { |
| 735 | matrix.mapXY(rect.fLeft, rect.fTop, rect_points(devRect, 0)); |
| 736 | matrix.mapXY(rect.fRight, rect.fBottom, rect_points(devRect, 1)); |
| 737 | devRect.sort(); |
| 738 | } |
| 739 | |
| 740 | if (fBounder && !fBounder->doRect(devRect, paint)) { |
| 741 | return; |
| 742 | } |
| 743 | |
| 744 | // look for the quick exit, before we build a blitter |
| 745 | { |
| 746 | SkIRect ir; |
| 747 | devRect.roundOut(&ir); |
reed@android.com | 55e76b2 | 2009-11-23 21:46:47 +0000 | [diff] [blame] | 748 | if (paint.getStyle() != SkPaint::kFill_Style) { |
| 749 | // extra space for hairlines |
| 750 | ir.inset(-1, -1); |
| 751 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 752 | if (fClip->quickReject(ir)) |
| 753 | return; |
| 754 | } |
| 755 | |
| 756 | SkAutoBlitterChoose blitterStorage(*fBitmap, matrix, paint); |
| 757 | SkBlitter* blitter = blitterStorage.get(); |
| 758 | const SkRegion* clip = fClip; |
| 759 | |
reed@android.com | b641c9f2 | 2010-03-25 14:31:46 +0000 | [diff] [blame] | 760 | // we want to "fill" if we are kFill or kStrokeAndFill, since in the latter |
| 761 | // case we are also hairline (if we've gotten to here), which devolves to |
| 762 | // effectively just kFill |
mike@reedtribe.org | 7ff678b | 2011-04-04 14:38:12 +0000 | [diff] [blame] | 763 | switch (rtype) { |
| 764 | case kFill_RectType: |
| 765 | if (paint.isAntiAlias()) { |
| 766 | SkScan::AntiFillRect(devRect, clip, blitter); |
| 767 | } else { |
| 768 | SkScan::FillRect(devRect, clip, blitter); |
| 769 | } |
| 770 | break; |
| 771 | case kStroke_RectType: |
| 772 | if (paint.isAntiAlias()) { |
reed@google.com | 761fb62 | 2011-04-04 18:58:05 +0000 | [diff] [blame] | 773 | SkScan::AntiFrameRect(devRect, strokeSize, clip, blitter); |
mike@reedtribe.org | 7ff678b | 2011-04-04 14:38:12 +0000 | [diff] [blame] | 774 | } else { |
reed@google.com | 761fb62 | 2011-04-04 18:58:05 +0000 | [diff] [blame] | 775 | SkScan::FrameRect(devRect, strokeSize, clip, blitter); |
mike@reedtribe.org | 7ff678b | 2011-04-04 14:38:12 +0000 | [diff] [blame] | 776 | } |
| 777 | break; |
| 778 | case kHair_RectType: |
| 779 | if (paint.isAntiAlias()) { |
| 780 | SkScan::AntiHairRect(devRect, clip, blitter); |
| 781 | } else { |
| 782 | SkScan::HairRect(devRect, clip, blitter); |
| 783 | } |
| 784 | break; |
| 785 | default: |
| 786 | SkASSERT(!"bad rtype"); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 787 | } |
| 788 | } |
| 789 | |
| 790 | void SkDraw::drawDevMask(const SkMask& srcM, const SkPaint& paint) const { |
| 791 | if (srcM.fBounds.isEmpty()) { |
| 792 | return; |
| 793 | } |
| 794 | |
| 795 | SkMask dstM; |
| 796 | const SkMask* mask = &srcM; |
| 797 | |
| 798 | dstM.fImage = NULL; |
| 799 | SkAutoMaskImage ami(&dstM, false); |
| 800 | |
| 801 | if (paint.getMaskFilter() && |
| 802 | paint.getMaskFilter()->filterMask(&dstM, srcM, *fMatrix, NULL)) { |
| 803 | mask = &dstM; |
| 804 | } |
| 805 | |
| 806 | if (fBounder && !fBounder->doIRect(mask->fBounds)) { |
| 807 | return; |
| 808 | } |
| 809 | |
| 810 | SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, paint); |
| 811 | |
| 812 | blitter->blitMaskRegion(*mask, *fClip); |
| 813 | } |
| 814 | |
| 815 | class SkAutoPaintRestoreColorStrokeWidth { |
| 816 | public: |
| 817 | SkAutoPaintRestoreColorStrokeWidth(const SkPaint& paint) { |
| 818 | fPaint = (SkPaint*)&paint; |
| 819 | fColor = paint.getColor(); |
| 820 | fWidth = paint.getStrokeWidth(); |
| 821 | } |
| 822 | ~SkAutoPaintRestoreColorStrokeWidth() { |
| 823 | fPaint->setColor(fColor); |
| 824 | fPaint->setStrokeWidth(fWidth); |
| 825 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 826 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 827 | private: |
| 828 | SkPaint* fPaint; |
| 829 | SkColor fColor; |
| 830 | SkScalar fWidth; |
| 831 | }; |
| 832 | |
reed@android.com | ebdeeb8 | 2009-09-03 21:45:49 +0000 | [diff] [blame] | 833 | static SkScalar fast_len(const SkVector& vec) { |
| 834 | SkScalar x = SkScalarAbs(vec.fX); |
| 835 | SkScalar y = SkScalarAbs(vec.fY); |
| 836 | if (x < y) { |
| 837 | SkTSwap(x, y); |
| 838 | } |
| 839 | return x + SkScalarHalf(y); |
| 840 | } |
| 841 | |
| 842 | // our idea is to return true if there is no appreciable skew or non-square scale |
| 843 | // for that we'll transform (0,1) and (1,0), and check that the resulting dot-prod |
| 844 | // is nearly one |
| 845 | static bool map_radius(const SkMatrix& matrix, SkScalar* value) { |
tomhudson@google.com | 8d43018 | 2011-06-06 19:11:19 +0000 | [diff] [blame] | 846 | if (matrix.hasPerspective()) { |
reed@android.com | ebdeeb8 | 2009-09-03 21:45:49 +0000 | [diff] [blame] | 847 | return false; |
| 848 | } |
| 849 | SkVector src[2], dst[2]; |
| 850 | src[0].set(*value, 0); |
| 851 | src[1].set(0, *value); |
| 852 | matrix.mapVectors(dst, src, 2); |
| 853 | SkScalar len0 = fast_len(dst[0]); |
| 854 | SkScalar len1 = fast_len(dst[1]); |
agl@chromium.org | 652807b | 2010-04-27 15:47:34 +0000 | [diff] [blame] | 855 | if (len0 <= SK_Scalar1 && len1 <= SK_Scalar1) { |
reed@android.com | ebdeeb8 | 2009-09-03 21:45:49 +0000 | [diff] [blame] | 856 | *value = SkScalarAve(len0, len1); |
| 857 | return true; |
| 858 | } |
| 859 | return false; |
| 860 | } |
| 861 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 862 | void SkDraw::drawPath(const SkPath& origSrcPath, const SkPaint& paint, |
| 863 | const SkMatrix* prePathMatrix, bool pathIsMutable) const { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 864 | SkDEBUGCODE(this->validate();) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 865 | |
| 866 | // nothing to draw |
| 867 | if (fClip->isEmpty() || |
| 868 | (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) { |
| 869 | return; |
| 870 | } |
| 871 | |
| 872 | SkPath* pathPtr = (SkPath*)&origSrcPath; |
| 873 | bool doFill = true; |
| 874 | SkPath tmpPath; |
| 875 | SkMatrix tmpMatrix; |
| 876 | const SkMatrix* matrix = fMatrix; |
| 877 | |
| 878 | if (prePathMatrix) { |
| 879 | if (paint.getPathEffect() || paint.getStyle() != SkPaint::kFill_Style || |
| 880 | paint.getRasterizer()) { |
| 881 | SkPath* result = pathPtr; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 882 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 883 | if (!pathIsMutable) { |
| 884 | result = &tmpPath; |
| 885 | pathIsMutable = true; |
| 886 | } |
| 887 | pathPtr->transform(*prePathMatrix, result); |
| 888 | pathPtr = result; |
| 889 | } else { |
| 890 | if (!tmpMatrix.setConcat(*matrix, *prePathMatrix)) { |
| 891 | // overflow |
| 892 | return; |
| 893 | } |
| 894 | matrix = &tmpMatrix; |
| 895 | } |
| 896 | } |
| 897 | // at this point we're done with prePathMatrix |
| 898 | SkDEBUGCODE(prePathMatrix = (const SkMatrix*)0x50FF8001;) |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 899 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 900 | /* |
| 901 | If the device thickness < 1.0, then make it a hairline, and |
| 902 | modulate alpha if the thickness is even smaller (e.g. thickness == 0.5 |
| 903 | should modulate the alpha by 1/2) |
| 904 | */ |
| 905 | |
| 906 | SkAutoPaintRestoreColorStrokeWidth aprc(paint); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 907 | |
reed@android.com | ebdeeb8 | 2009-09-03 21:45:49 +0000 | [diff] [blame] | 908 | // can we approximate a thin (but not hairline) stroke with an alpha-modulated |
| 909 | // hairline? Only if the matrix scales evenly in X and Y, and the device-width is |
| 910 | // less than a pixel |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 911 | if (paint.isAntiAlias() && |
| 912 | paint.getStyle() == SkPaint::kStroke_Style && paint.getXfermode() == NULL) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 913 | SkScalar width = paint.getStrokeWidth(); |
reed@android.com | ebdeeb8 | 2009-09-03 21:45:49 +0000 | [diff] [blame] | 914 | if (width > 0 && map_radius(*matrix, &width)) { |
| 915 | int scale = (int)SkScalarMul(width, 256); |
| 916 | int alpha = paint.getAlpha() * scale >> 8; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 917 | |
reed@android.com | ebdeeb8 | 2009-09-03 21:45:49 +0000 | [diff] [blame] | 918 | // pretend to be a hairline, with a modulated alpha |
| 919 | ((SkPaint*)&paint)->setAlpha(alpha); |
| 920 | ((SkPaint*)&paint)->setStrokeWidth(0); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 921 | } |
| 922 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 923 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 924 | if (paint.getPathEffect() || paint.getStyle() != SkPaint::kFill_Style) { |
| 925 | doFill = paint.getFillPath(*pathPtr, &tmpPath); |
| 926 | pathPtr = &tmpPath; |
| 927 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 928 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 929 | if (paint.getRasterizer()) { |
| 930 | SkMask mask; |
| 931 | if (paint.getRasterizer()->rasterize(*pathPtr, *matrix, |
| 932 | &fClip->getBounds(), paint.getMaskFilter(), &mask, |
| 933 | SkMask::kComputeBoundsAndRenderImage_CreateMode)) { |
| 934 | this->drawDevMask(mask, paint); |
| 935 | SkMask::FreeImage(mask.fImage); |
| 936 | } |
| 937 | return; |
| 938 | } |
| 939 | |
| 940 | // avoid possibly allocating a new path in transform if we can |
| 941 | SkPath* devPathPtr = pathIsMutable ? pathPtr : &tmpPath; |
| 942 | |
| 943 | // transform the path into device space |
| 944 | pathPtr->transform(*matrix, devPathPtr); |
| 945 | |
| 946 | SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, paint); |
| 947 | |
| 948 | // how does filterPath() know to fill or hairline the path??? <mrr> |
| 949 | if (paint.getMaskFilter() && |
| 950 | paint.getMaskFilter()->filterPath(*devPathPtr, *fMatrix, *fClip, |
| 951 | fBounder, blitter.get())) { |
| 952 | return; // filterPath() called the blitter, so we're done |
| 953 | } |
| 954 | |
| 955 | if (fBounder && !fBounder->doPath(*devPathPtr, paint, doFill)) { |
| 956 | return; |
| 957 | } |
| 958 | |
| 959 | if (doFill) { |
| 960 | if (paint.isAntiAlias()) { |
| 961 | SkScan::AntiFillPath(*devPathPtr, *fClip, blitter.get()); |
| 962 | } else { |
| 963 | SkScan::FillPath(*devPathPtr, *fClip, blitter.get()); |
| 964 | } |
| 965 | } else { // hairline |
| 966 | if (paint.isAntiAlias()) { |
| 967 | SkScan::AntiHairPath(*devPathPtr, fClip, blitter.get()); |
| 968 | } else { |
| 969 | SkScan::HairPath(*devPathPtr, fClip, blitter.get()); |
| 970 | } |
| 971 | } |
| 972 | } |
| 973 | |
reed@android.com | 0baf193 | 2009-06-24 12:41:42 +0000 | [diff] [blame] | 974 | /** For the purposes of drawing bitmaps, if a matrix is "almost" translate |
| 975 | go ahead and treat it as if it were, so that subsequent code can go fast. |
| 976 | */ |
| 977 | static bool just_translate(const SkMatrix& matrix, const SkBitmap& bitmap) { |
| 978 | SkMatrix::TypeMask mask = matrix.getType(); |
| 979 | |
| 980 | if (mask & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)) { |
| 981 | return false; |
| 982 | } |
| 983 | if (mask & SkMatrix::kScale_Mask) { |
| 984 | SkScalar sx = matrix[SkMatrix::kMScaleX]; |
| 985 | SkScalar sy = matrix[SkMatrix::kMScaleY]; |
| 986 | int w = bitmap.width(); |
| 987 | int h = bitmap.height(); |
| 988 | int sw = SkScalarRound(SkScalarMul(sx, SkIntToScalar(w))); |
| 989 | int sh = SkScalarRound(SkScalarMul(sy, SkIntToScalar(h))); |
| 990 | return sw == w && sh == h; |
| 991 | } |
| 992 | // if we got here, we're either kTranslate_Mask or identity |
| 993 | return true; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 994 | } |
| 995 | |
| 996 | void SkDraw::drawBitmapAsMask(const SkBitmap& bitmap, |
| 997 | const SkPaint& paint) const { |
| 998 | SkASSERT(bitmap.getConfig() == SkBitmap::kA8_Config); |
| 999 | |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1000 | if (just_translate(*fMatrix, bitmap)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1001 | int ix = SkScalarRound(fMatrix->getTranslateX()); |
| 1002 | int iy = SkScalarRound(fMatrix->getTranslateY()); |
| 1003 | |
| 1004 | SkMask mask; |
| 1005 | mask.fBounds.set(ix, iy, ix + bitmap.width(), iy + bitmap.height()); |
| 1006 | mask.fFormat = SkMask::kA8_Format; |
| 1007 | mask.fRowBytes = bitmap.rowBytes(); |
| 1008 | mask.fImage = bitmap.getAddr8(0, 0); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1009 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1010 | this->drawDevMask(mask, paint); |
| 1011 | } else { // need to xform the bitmap first |
| 1012 | SkRect r; |
| 1013 | SkMask mask; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1014 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1015 | r.set(0, 0, |
| 1016 | SkIntToScalar(bitmap.width()), SkIntToScalar(bitmap.height())); |
| 1017 | fMatrix->mapRect(&r); |
| 1018 | r.round(&mask.fBounds); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1019 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1020 | // set the mask's bounds to the transformed bitmap-bounds, |
| 1021 | // clipped to the actual device |
| 1022 | { |
| 1023 | SkIRect devBounds; |
| 1024 | devBounds.set(0, 0, fBitmap->width(), fBitmap->height()); |
| 1025 | // need intersect(l, t, r, b) on irect |
| 1026 | if (!mask.fBounds.intersect(devBounds)) { |
| 1027 | return; |
| 1028 | } |
| 1029 | } |
reed@android.com | 543ed93 | 2009-04-24 12:43:40 +0000 | [diff] [blame] | 1030 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1031 | mask.fFormat = SkMask::kA8_Format; |
| 1032 | mask.fRowBytes = SkAlign4(mask.fBounds.width()); |
reed@android.com | 543ed93 | 2009-04-24 12:43:40 +0000 | [diff] [blame] | 1033 | size_t size = mask.computeImageSize(); |
| 1034 | if (0 == size) { |
| 1035 | // the mask is too big to allocated, draw nothing |
| 1036 | return; |
| 1037 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1038 | |
| 1039 | // allocate (and clear) our temp buffer to hold the transformed bitmap |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1040 | SkAutoMalloc storage(size); |
| 1041 | mask.fImage = (uint8_t*)storage.get(); |
| 1042 | memset(mask.fImage, 0, size); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1043 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1044 | // now draw our bitmap(src) into mask(dst), transformed by the matrix |
| 1045 | { |
| 1046 | SkBitmap device; |
| 1047 | device.setConfig(SkBitmap::kA8_Config, mask.fBounds.width(), |
| 1048 | mask.fBounds.height(), mask.fRowBytes); |
| 1049 | device.setPixels(mask.fImage); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1050 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1051 | SkCanvas c(device); |
| 1052 | // need the unclipped top/left for the translate |
| 1053 | c.translate(-SkIntToScalar(mask.fBounds.fLeft), |
| 1054 | -SkIntToScalar(mask.fBounds.fTop)); |
| 1055 | c.concat(*fMatrix); |
reed@android.com | 3469c76 | 2009-02-24 19:03:20 +0000 | [diff] [blame] | 1056 | |
| 1057 | // We can't call drawBitmap, or we'll infinitely recurse. Instead |
reed@android.com | fb12c3e | 2009-03-05 20:43:42 +0000 | [diff] [blame] | 1058 | // we manually build a shader and draw that into our new mask |
reed@android.com | 3469c76 | 2009-02-24 19:03:20 +0000 | [diff] [blame] | 1059 | SkPaint tmpPaint; |
| 1060 | tmpPaint.setFlags(paint.getFlags()); |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 1061 | SkAutoBitmapShaderInstall install(bitmap, tmpPaint); |
reed@android.com | 3469c76 | 2009-02-24 19:03:20 +0000 | [diff] [blame] | 1062 | SkRect rr; |
| 1063 | rr.set(0, 0, SkIntToScalar(bitmap.width()), |
| 1064 | SkIntToScalar(bitmap.height())); |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 1065 | c.drawRect(rr, install.paintWithShader()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1066 | } |
| 1067 | this->drawDevMask(mask, paint); |
| 1068 | } |
| 1069 | } |
| 1070 | |
| 1071 | static bool clipped_out(const SkMatrix& m, const SkRegion& c, |
| 1072 | const SkRect& srcR) { |
| 1073 | SkRect dstR; |
| 1074 | SkIRect devIR; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1075 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1076 | m.mapRect(&dstR, srcR); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1077 | dstR.roundOut(&devIR); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1078 | return c.quickReject(devIR); |
| 1079 | } |
| 1080 | |
| 1081 | static bool clipped_out(const SkMatrix& matrix, const SkRegion& clip, |
| 1082 | int width, int height) { |
| 1083 | SkRect r; |
| 1084 | r.set(0, 0, SkIntToScalar(width), SkIntToScalar(height)); |
| 1085 | return clipped_out(matrix, clip, r); |
| 1086 | } |
| 1087 | |
| 1088 | void SkDraw::drawBitmap(const SkBitmap& bitmap, const SkMatrix& prematrix, |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 1089 | const SkPaint& origPaint) const { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1090 | SkDEBUGCODE(this->validate();) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1091 | |
| 1092 | // nothing to draw |
| 1093 | if (fClip->isEmpty() || |
| 1094 | bitmap.width() == 0 || bitmap.height() == 0 || |
| 1095 | bitmap.getConfig() == SkBitmap::kNo_Config || |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 1096 | (origPaint.getAlpha() == 0 && origPaint.getXfermode() == NULL)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1097 | return; |
| 1098 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1099 | |
| 1100 | #ifndef SK_ALLOW_OVER_32K_BITMAPS |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1101 | // run away on too-big bitmaps for now (exceed 16.16) |
| 1102 | if (bitmap.width() > 32767 || bitmap.height() > 32767) { |
| 1103 | return; |
| 1104 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1105 | #endif |
| 1106 | |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 1107 | SkPaint paint(origPaint); |
| 1108 | paint.setStyle(SkPaint::kFill_Style); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1109 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1110 | SkMatrix matrix; |
| 1111 | if (!matrix.setConcat(*fMatrix, prematrix)) { |
| 1112 | return; |
| 1113 | } |
| 1114 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1115 | if (clipped_out(matrix, *fClip, bitmap.width(), bitmap.height())) { |
| 1116 | return; |
| 1117 | } |
| 1118 | |
reed@android.com | 218521e | 2010-02-09 13:06:29 +0000 | [diff] [blame] | 1119 | if (fBounder && just_translate(matrix, bitmap)) { |
| 1120 | SkIRect ir; |
| 1121 | int32_t ix = SkScalarRound(matrix.getTranslateX()); |
| 1122 | int32_t iy = SkScalarRound(matrix.getTranslateY()); |
| 1123 | ir.set(ix, iy, ix + bitmap.width(), iy + bitmap.height()); |
| 1124 | if (!fBounder->doIRect(ir)) { |
| 1125 | return; |
| 1126 | } |
| 1127 | } |
| 1128 | |
| 1129 | // only lock the pixels if we passed the clip and bounder tests |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1130 | SkAutoLockPixels alp(bitmap); |
| 1131 | // after the lock, check if we are valid |
| 1132 | if (!bitmap.readyToDraw()) { |
| 1133 | return; |
| 1134 | } |
| 1135 | |
reed@android.com | 0baf193 | 2009-06-24 12:41:42 +0000 | [diff] [blame] | 1136 | if (bitmap.getConfig() != SkBitmap::kA8_Config && |
| 1137 | just_translate(matrix, bitmap)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1138 | int ix = SkScalarRound(matrix.getTranslateX()); |
| 1139 | int iy = SkScalarRound(matrix.getTranslateY()); |
| 1140 | uint32_t storage[kBlitterStorageLongCount]; |
| 1141 | SkBlitter* blitter = SkBlitter::ChooseSprite(*fBitmap, paint, bitmap, |
| 1142 | ix, iy, storage, sizeof(storage)); |
| 1143 | if (blitter) { |
| 1144 | SkAutoTPlacementDelete<SkBlitter> ad(blitter, storage); |
| 1145 | |
| 1146 | SkIRect ir; |
| 1147 | ir.set(ix, iy, ix + bitmap.width(), iy + bitmap.height()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1148 | |
| 1149 | SkRegion::Cliperator iter(*fClip, ir); |
| 1150 | const SkIRect& cr = iter.rect(); |
| 1151 | |
| 1152 | for (; !iter.done(); iter.next()) { |
| 1153 | SkASSERT(!cr.isEmpty()); |
| 1154 | blitter->blitRect(cr.fLeft, cr.fTop, cr.width(), cr.height()); |
| 1155 | } |
| 1156 | return; |
| 1157 | } |
| 1158 | #if 0 |
| 1159 | SkDebugf("---- MISSING sprite case: config=%d [%d %d], device=%d, xfer=%p, alpha=0x%X colorFilter=%p\n", |
| 1160 | bitmap.config(), bitmap.width(), bitmap.height(), fBitmap->config(), |
| 1161 | paint.getXfermode(), paint.getAlpha(), paint.getColorFilter()); |
| 1162 | #endif |
| 1163 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1164 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1165 | // now make a temp draw on the stack, and use it |
| 1166 | // |
| 1167 | SkDraw draw(*this); |
| 1168 | draw.fMatrix = &matrix; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1169 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1170 | if (bitmap.getConfig() == SkBitmap::kA8_Config) { |
| 1171 | draw.drawBitmapAsMask(bitmap, paint); |
| 1172 | } else { |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 1173 | SkAutoBitmapShaderInstall install(bitmap, paint); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1174 | |
| 1175 | SkRect r; |
| 1176 | r.set(0, 0, SkIntToScalar(bitmap.width()), |
| 1177 | SkIntToScalar(bitmap.height())); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1178 | // is this ok if paint has a rasterizer? |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 1179 | draw.drawRect(r, install.paintWithShader()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1180 | } |
| 1181 | } |
| 1182 | |
| 1183 | void SkDraw::drawSprite(const SkBitmap& bitmap, int x, int y, |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 1184 | const SkPaint& origPaint) const { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1185 | SkDEBUGCODE(this->validate();) |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1186 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1187 | // nothing to draw |
| 1188 | if (fClip->isEmpty() || |
| 1189 | bitmap.width() == 0 || bitmap.height() == 0 || |
| 1190 | bitmap.getConfig() == SkBitmap::kNo_Config || |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 1191 | (origPaint.getAlpha() == 0 && origPaint.getXfermode() == NULL)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1192 | return; |
| 1193 | } |
| 1194 | |
| 1195 | SkIRect bounds; |
| 1196 | bounds.set(x, y, x + bitmap.width(), y + bitmap.height()); |
| 1197 | |
| 1198 | if (fClip->quickReject(bounds)) { |
| 1199 | return; // nothing to draw |
| 1200 | } |
| 1201 | |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 1202 | SkPaint paint(origPaint); |
| 1203 | paint.setStyle(SkPaint::kFill_Style); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1204 | |
| 1205 | if (NULL == paint.getColorFilter()) { |
| 1206 | uint32_t storage[kBlitterStorageLongCount]; |
| 1207 | SkBlitter* blitter = SkBlitter::ChooseSprite(*fBitmap, paint, bitmap, |
| 1208 | x, y, storage, sizeof(storage)); |
| 1209 | |
| 1210 | if (blitter) { |
| 1211 | SkAutoTPlacementDelete<SkBlitter> ad(blitter, storage); |
| 1212 | |
| 1213 | if (fBounder && !fBounder->doIRect(bounds)) { |
| 1214 | return; |
| 1215 | } |
| 1216 | |
| 1217 | SkRegion::Cliperator iter(*fClip, bounds); |
| 1218 | const SkIRect& cr = iter.rect(); |
| 1219 | |
| 1220 | for (; !iter.done(); iter.next()) { |
| 1221 | SkASSERT(!cr.isEmpty()); |
| 1222 | blitter->blitRect(cr.fLeft, cr.fTop, cr.width(), cr.height()); |
| 1223 | } |
| 1224 | return; |
| 1225 | } |
| 1226 | } |
| 1227 | |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 1228 | SkAutoBitmapShaderInstall install(bitmap, paint); |
| 1229 | const SkPaint& shaderPaint = install.paintWithShader(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1230 | |
| 1231 | SkMatrix matrix; |
| 1232 | SkRect r; |
| 1233 | |
| 1234 | // get a scalar version of our rect |
| 1235 | r.set(bounds); |
| 1236 | |
| 1237 | // tell the shader our offset |
| 1238 | matrix.setTranslate(r.fLeft, r.fTop); |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 1239 | shaderPaint.getShader()->setLocalMatrix(matrix); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1240 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1241 | SkDraw draw(*this); |
| 1242 | matrix.reset(); |
| 1243 | draw.fMatrix = &matrix; |
| 1244 | // call ourself with a rect |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1245 | // is this OK if paint has a rasterizer? |
reed@google.com | 40c2ba2 | 2011-07-25 19:41:22 +0000 | [diff] [blame] | 1246 | draw.drawRect(r, shaderPaint); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1247 | } |
| 1248 | |
| 1249 | /////////////////////////////////////////////////////////////////////////////// |
| 1250 | |
| 1251 | #include "SkScalerContext.h" |
| 1252 | #include "SkGlyphCache.h" |
| 1253 | #include "SkUtils.h" |
| 1254 | |
| 1255 | static void measure_text(SkGlyphCache* cache, SkDrawCacheProc glyphCacheProc, |
| 1256 | const char text[], size_t byteLength, SkVector* stopVector) { |
| 1257 | SkFixed x = 0, y = 0; |
| 1258 | const char* stop = text + byteLength; |
| 1259 | |
| 1260 | SkAutoKern autokern; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1261 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1262 | while (text < stop) { |
| 1263 | // don't need x, y here, since all subpixel variants will have the |
| 1264 | // same advance |
| 1265 | const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); |
| 1266 | |
| 1267 | x += autokern.adjust(glyph) + glyph.fAdvanceX; |
| 1268 | y += glyph.fAdvanceY; |
| 1269 | } |
| 1270 | stopVector->set(SkFixedToScalar(x), SkFixedToScalar(y)); |
| 1271 | |
| 1272 | SkASSERT(text == stop); |
| 1273 | } |
| 1274 | |
| 1275 | void SkDraw::drawText_asPaths(const char text[], size_t byteLength, |
| 1276 | SkScalar x, SkScalar y, |
| 1277 | const SkPaint& paint) const { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1278 | SkDEBUGCODE(this->validate();) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1279 | |
| 1280 | SkTextToPathIter iter(text, byteLength, paint, true, true); |
| 1281 | |
| 1282 | SkMatrix matrix; |
| 1283 | matrix.setScale(iter.getPathScale(), iter.getPathScale()); |
| 1284 | matrix.postTranslate(x, y); |
| 1285 | |
| 1286 | const SkPath* iterPath; |
| 1287 | SkScalar xpos, prevXPos = 0; |
| 1288 | |
| 1289 | while ((iterPath = iter.next(&xpos)) != NULL) { |
| 1290 | matrix.postTranslate(xpos - prevXPos, 0); |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1291 | const SkPaint& pnt = iter.getPaint(); |
| 1292 | if (fDevice) { |
| 1293 | fDevice->drawPath(*this, *iterPath, pnt, &matrix, false); |
| 1294 | } else { |
| 1295 | this->drawPath(*iterPath, pnt, &matrix, false); |
| 1296 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1297 | prevXPos = xpos; |
| 1298 | } |
| 1299 | } |
| 1300 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1301 | static void draw_paint_rect(const SkDraw* draw, const SkPaint& paint, |
| 1302 | const SkRect& r, SkScalar textSize) { |
| 1303 | if (paint.getStyle() == SkPaint::kFill_Style) { |
| 1304 | draw->drawRect(r, paint); |
| 1305 | } else { |
| 1306 | SkPaint p(paint); |
| 1307 | p.setStrokeWidth(SkScalarMul(textSize, paint.getStrokeWidth())); |
| 1308 | draw->drawRect(r, p); |
| 1309 | } |
| 1310 | } |
| 1311 | |
| 1312 | static void handle_aftertext(const SkDraw* draw, const SkPaint& paint, |
| 1313 | SkScalar width, const SkPoint& start) { |
| 1314 | uint32_t flags = paint.getFlags(); |
| 1315 | |
| 1316 | if (flags & (SkPaint::kUnderlineText_Flag | |
| 1317 | SkPaint::kStrikeThruText_Flag)) { |
| 1318 | SkScalar textSize = paint.getTextSize(); |
| 1319 | SkScalar height = SkScalarMul(textSize, kStdUnderline_Thickness); |
| 1320 | SkRect r; |
| 1321 | |
| 1322 | r.fLeft = start.fX; |
| 1323 | r.fRight = start.fX + width; |
| 1324 | |
| 1325 | if (flags & SkPaint::kUnderlineText_Flag) { |
| 1326 | SkScalar offset = SkScalarMulAdd(textSize, kStdUnderline_Offset, |
| 1327 | start.fY); |
| 1328 | r.fTop = offset; |
| 1329 | r.fBottom = offset + height; |
| 1330 | draw_paint_rect(draw, paint, r, textSize); |
| 1331 | } |
| 1332 | if (flags & SkPaint::kStrikeThruText_Flag) { |
| 1333 | SkScalar offset = SkScalarMulAdd(textSize, kStdStrikeThru_Offset, |
| 1334 | start.fY); |
| 1335 | r.fTop = offset; |
| 1336 | r.fBottom = offset + height; |
| 1337 | draw_paint_rect(draw, paint, r, textSize); |
| 1338 | } |
| 1339 | } |
| 1340 | } |
| 1341 | |
| 1342 | // disable warning : local variable used without having been initialized |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1343 | #if defined _WIN32 && _MSC_VER >= 1300 |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1344 | #pragma warning ( push ) |
| 1345 | #pragma warning ( disable : 4701 ) |
| 1346 | #endif |
| 1347 | |
| 1348 | ////////////////////////////////////////////////////////////////////////////// |
| 1349 | |
| 1350 | static void D1G_NoBounder_RectClip(const SkDraw1Glyph& state, |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1351 | SkFixed fx, SkFixed fy, |
| 1352 | const SkGlyph& glyph) { |
| 1353 | int left = SkFixedFloor(fx); |
| 1354 | int top = SkFixedFloor(fy); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1355 | SkASSERT(glyph.fWidth > 0 && glyph.fHeight > 0); |
| 1356 | SkASSERT(state.fClip->isRect()); |
| 1357 | SkASSERT(NULL == state.fBounder); |
| 1358 | SkASSERT(state.fClipBounds == state.fClip->getBounds()); |
| 1359 | |
| 1360 | left += glyph.fLeft; |
| 1361 | top += glyph.fTop; |
| 1362 | |
| 1363 | int right = left + glyph.fWidth; |
| 1364 | int bottom = top + glyph.fHeight; |
| 1365 | |
| 1366 | SkMask mask; |
| 1367 | SkIRect storage; |
| 1368 | SkIRect* bounds = &mask.fBounds; |
| 1369 | |
| 1370 | mask.fBounds.set(left, top, right, bottom); |
| 1371 | |
| 1372 | // this extra test is worth it, assuming that most of the time it succeeds |
| 1373 | // since we can avoid writing to storage |
| 1374 | if (!state.fClipBounds.containsNoEmptyCheck(left, top, right, bottom)) { |
| 1375 | if (!storage.intersectNoEmptyCheck(mask.fBounds, state.fClipBounds)) |
| 1376 | return; |
| 1377 | bounds = &storage; |
| 1378 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1379 | |
| 1380 | uint8_t* aa = (uint8_t*)glyph.fImage; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1381 | if (NULL == aa) { |
| 1382 | aa = (uint8_t*)state.fCache->findImage(glyph); |
| 1383 | if (NULL == aa) { |
| 1384 | return; // can't rasterize glyph |
| 1385 | } |
| 1386 | } |
| 1387 | |
| 1388 | mask.fRowBytes = glyph.rowBytes(); |
reed@android.com | 6c14b43 | 2009-03-23 20:11:11 +0000 | [diff] [blame] | 1389 | mask.fFormat = static_cast<SkMask::Format>(glyph.fMaskFormat); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1390 | mask.fImage = aa; |
| 1391 | state.fBlitter->blitMask(mask, *bounds); |
| 1392 | } |
| 1393 | |
| 1394 | static void D1G_NoBounder_RgnClip(const SkDraw1Glyph& state, |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1395 | SkFixed fx, SkFixed fy, |
| 1396 | const SkGlyph& glyph) { |
| 1397 | int left = SkFixedFloor(fx); |
| 1398 | int top = SkFixedFloor(fy); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1399 | SkASSERT(glyph.fWidth > 0 && glyph.fHeight > 0); |
| 1400 | SkASSERT(!state.fClip->isRect()); |
| 1401 | SkASSERT(NULL == state.fBounder); |
| 1402 | |
| 1403 | SkMask mask; |
| 1404 | |
| 1405 | left += glyph.fLeft; |
| 1406 | top += glyph.fTop; |
| 1407 | |
| 1408 | mask.fBounds.set(left, top, left + glyph.fWidth, top + glyph.fHeight); |
| 1409 | SkRegion::Cliperator clipper(*state.fClip, mask.fBounds); |
| 1410 | |
| 1411 | if (!clipper.done()) { |
| 1412 | const SkIRect& cr = clipper.rect(); |
| 1413 | const uint8_t* aa = (const uint8_t*)glyph.fImage; |
| 1414 | if (NULL == aa) { |
| 1415 | aa = (uint8_t*)state.fCache->findImage(glyph); |
| 1416 | if (NULL == aa) { |
| 1417 | return; |
| 1418 | } |
| 1419 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1420 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1421 | mask.fRowBytes = glyph.rowBytes(); |
reed@android.com | 6c14b43 | 2009-03-23 20:11:11 +0000 | [diff] [blame] | 1422 | mask.fFormat = static_cast<SkMask::Format>(glyph.fMaskFormat); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1423 | mask.fImage = (uint8_t*)aa; |
| 1424 | do { |
| 1425 | state.fBlitter->blitMask(mask, cr); |
| 1426 | clipper.next(); |
| 1427 | } while (!clipper.done()); |
| 1428 | } |
| 1429 | } |
| 1430 | |
| 1431 | static void D1G_Bounder(const SkDraw1Glyph& state, |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1432 | SkFixed fx, SkFixed fy, |
| 1433 | const SkGlyph& glyph) { |
| 1434 | int left = SkFixedFloor(fx); |
| 1435 | int top = SkFixedFloor(fy); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1436 | SkASSERT(glyph.fWidth > 0 && glyph.fHeight > 0); |
| 1437 | |
| 1438 | SkMask mask; |
| 1439 | |
| 1440 | left += glyph.fLeft; |
| 1441 | top += glyph.fTop; |
| 1442 | |
| 1443 | mask.fBounds.set(left, top, left + glyph.fWidth, top + glyph.fHeight); |
| 1444 | SkRegion::Cliperator clipper(*state.fClip, mask.fBounds); |
| 1445 | |
| 1446 | if (!clipper.done()) { |
| 1447 | const SkIRect& cr = clipper.rect(); |
| 1448 | const uint8_t* aa = (const uint8_t*)glyph.fImage; |
| 1449 | if (NULL == aa) { |
| 1450 | aa = (uint8_t*)state.fCache->findImage(glyph); |
| 1451 | if (NULL == aa) { |
| 1452 | return; |
| 1453 | } |
| 1454 | } |
reed@android.com | d055c1f | 2010-03-01 14:54:05 +0000 | [diff] [blame] | 1455 | |
| 1456 | // we need to pass the origin, which we approximate with our |
| 1457 | // (unadjusted) left,top coordinates (the caller called fixedfloor) |
| 1458 | if (state.fBounder->doIRectGlyph(cr, |
| 1459 | left - glyph.fLeft, |
| 1460 | top - glyph.fTop, glyph)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1461 | mask.fRowBytes = glyph.rowBytes(); |
reed@android.com | 6c14b43 | 2009-03-23 20:11:11 +0000 | [diff] [blame] | 1462 | mask.fFormat = static_cast<SkMask::Format>(glyph.fMaskFormat); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1463 | mask.fImage = (uint8_t*)aa; |
| 1464 | do { |
| 1465 | state.fBlitter->blitMask(mask, cr); |
| 1466 | clipper.next(); |
| 1467 | } while (!clipper.done()); |
| 1468 | } |
| 1469 | } |
| 1470 | } |
| 1471 | |
reed@google.com | fd4236e | 2011-07-25 21:16:22 +0000 | [diff] [blame^] | 1472 | static bool hasCustomD1GProc(const SkDraw& draw) { |
| 1473 | return draw.fProcs && draw.fProcs->fD1GProc; |
| 1474 | } |
| 1475 | |
| 1476 | static bool needsRasterTextBlit(const SkDraw& draw) { |
| 1477 | return !hasCustomD1GProc(draw); |
| 1478 | } |
| 1479 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1480 | SkDraw1Glyph::Proc SkDraw1Glyph::init(const SkDraw* draw, SkBlitter* blitter, |
| 1481 | SkGlyphCache* cache) { |
| 1482 | fDraw = draw; |
| 1483 | fBounder = draw->fBounder; |
| 1484 | fClip = draw->fClip; |
| 1485 | fClipBounds = fClip->getBounds(); |
| 1486 | fBlitter = blitter; |
| 1487 | fCache = cache; |
| 1488 | |
reed@google.com | 1d6ee0b | 2011-07-05 17:44:56 +0000 | [diff] [blame] | 1489 | if (hasCustomD1GProc(*draw)) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1490 | return draw->fProcs->fD1GProc; |
| 1491 | } |
| 1492 | |
| 1493 | if (NULL == fBounder) { |
| 1494 | if (fClip->isRect()) { |
| 1495 | return D1G_NoBounder_RectClip; |
| 1496 | } else { |
| 1497 | return D1G_NoBounder_RgnClip; |
| 1498 | } |
| 1499 | } else { |
| 1500 | return D1G_Bounder; |
| 1501 | } |
| 1502 | } |
| 1503 | |
| 1504 | enum RoundBaseline { |
| 1505 | kDont_Round_Baseline, |
| 1506 | kRound_X_Baseline, |
| 1507 | kRound_Y_Baseline |
| 1508 | }; |
| 1509 | |
| 1510 | static RoundBaseline computeRoundBaseline(const SkMatrix& mat) { |
| 1511 | if (mat[1] == 0 && mat[3] == 0) { |
| 1512 | // we're 0 or 180 degrees, round the y coordinate of the baseline |
| 1513 | return kRound_Y_Baseline; |
| 1514 | } else if (mat[0] == 0 && mat[4] == 0) { |
| 1515 | // we're 90 or 270 degrees, round the x coordinate of the baseline |
| 1516 | return kRound_X_Baseline; |
| 1517 | } else { |
| 1518 | return kDont_Round_Baseline; |
| 1519 | } |
| 1520 | } |
| 1521 | |
| 1522 | /////////////////////////////////////////////////////////////////////////////// |
| 1523 | |
| 1524 | void SkDraw::drawText(const char text[], size_t byteLength, |
| 1525 | SkScalar x, SkScalar y, const SkPaint& paint) const { |
| 1526 | SkASSERT(byteLength == 0 || text != NULL); |
| 1527 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1528 | SkDEBUGCODE(this->validate();) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1529 | |
| 1530 | // nothing to draw |
| 1531 | if (text == NULL || byteLength == 0 || |
| 1532 | fClip->isEmpty() || |
| 1533 | (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) { |
| 1534 | return; |
| 1535 | } |
| 1536 | |
| 1537 | SkScalar underlineWidth = 0; |
| 1538 | SkPoint underlineStart; |
| 1539 | |
| 1540 | underlineStart.set(0, 0); // to avoid warning |
| 1541 | if (paint.getFlags() & (SkPaint::kUnderlineText_Flag | |
| 1542 | SkPaint::kStrikeThruText_Flag)) { |
| 1543 | underlineWidth = paint.measureText(text, byteLength); |
| 1544 | |
| 1545 | SkScalar offsetX = 0; |
| 1546 | if (paint.getTextAlign() == SkPaint::kCenter_Align) { |
| 1547 | offsetX = SkScalarHalf(underlineWidth); |
| 1548 | } else if (paint.getTextAlign() == SkPaint::kRight_Align) { |
| 1549 | offsetX = underlineWidth; |
| 1550 | } |
| 1551 | underlineStart.set(x - offsetX, y); |
| 1552 | } |
| 1553 | |
| 1554 | if (/*paint.isLinearText() ||*/ |
tomhudson@google.com | 8d43018 | 2011-06-06 19:11:19 +0000 | [diff] [blame] | 1555 | (fMatrix->hasPerspective())) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1556 | this->drawText_asPaths(text, byteLength, x, y, paint); |
| 1557 | handle_aftertext(this, paint, underlineWidth, underlineStart); |
| 1558 | return; |
| 1559 | } |
| 1560 | |
| 1561 | SkDrawCacheProc glyphCacheProc = paint.getDrawCacheProc(); |
| 1562 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1563 | const SkMatrix* matrix = fMatrix; |
| 1564 | SkFixed finalFYMask = ~0xFFFF; // trunc fy; |
reed@google.com | 1d6ee0b | 2011-07-05 17:44:56 +0000 | [diff] [blame] | 1565 | if (hasCustomD1GProc(*this)) { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1566 | // only support the fMVMatrix (for now) for the GPU case, which also |
| 1567 | // sets the fD1GProc |
| 1568 | if (fMVMatrix) { |
| 1569 | matrix = fMVMatrix; |
| 1570 | finalFYMask = ~0; // don't truncate |
| 1571 | } |
| 1572 | } |
| 1573 | |
| 1574 | SkAutoGlyphCache autoCache(paint, matrix); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1575 | SkGlyphCache* cache = autoCache.getCache(); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1576 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1577 | // transform our starting point |
| 1578 | { |
| 1579 | SkPoint loc; |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1580 | matrix->mapXY(x, y, &loc); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1581 | x = loc.fX; |
| 1582 | y = loc.fY; |
| 1583 | } |
| 1584 | |
| 1585 | // need to measure first |
| 1586 | if (paint.getTextAlign() != SkPaint::kLeft_Align) { |
| 1587 | SkVector stop; |
| 1588 | |
| 1589 | measure_text(cache, glyphCacheProc, text, byteLength, &stop); |
| 1590 | |
| 1591 | SkScalar stopX = stop.fX; |
| 1592 | SkScalar stopY = stop.fY; |
| 1593 | |
| 1594 | if (paint.getTextAlign() == SkPaint::kCenter_Align) { |
| 1595 | stopX = SkScalarHalf(stopX); |
| 1596 | stopY = SkScalarHalf(stopY); |
| 1597 | } |
| 1598 | x -= stopX; |
| 1599 | y -= stopY; |
| 1600 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1601 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1602 | SkFixed fx = SkScalarToFixed(x); |
| 1603 | SkFixed fy = SkScalarToFixed(y); |
| 1604 | const char* stop = text + byteLength; |
| 1605 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1606 | SkFixed fxMask = ~0; |
| 1607 | SkFixed fyMask = ~0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1608 | if (paint.isSubpixelText()) { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1609 | RoundBaseline roundBaseline = computeRoundBaseline(*matrix); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1610 | if (kRound_Y_Baseline == roundBaseline) { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1611 | fyMask = 0; |
| 1612 | // fy = (fy + 0x8000) & ~0xFFFF; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1613 | } else if (kRound_X_Baseline == roundBaseline) { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1614 | fxMask = 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1615 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1616 | } |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1617 | // apply the bias here, so we don't have to add 1/2 in the loop |
| 1618 | fx += SK_FixedHalf; |
| 1619 | fy += SK_FixedHalf; |
reed@google.com | 39ce0ac | 2011-04-08 15:42:19 +0000 | [diff] [blame] | 1620 | fyMask &= finalFYMask; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1621 | |
reed@google.com | 1d6ee0b | 2011-07-05 17:44:56 +0000 | [diff] [blame] | 1622 | SkAutoBlitterChoose blitter; |
| 1623 | if (needsRasterTextBlit(*this)) { |
| 1624 | blitter.choose(*fBitmap, *matrix, paint); |
| 1625 | } |
| 1626 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1627 | SkAutoKern autokern; |
| 1628 | SkDraw1Glyph d1g; |
| 1629 | SkDraw1Glyph::Proc proc = d1g.init(this, blitter.get(), cache); |
| 1630 | |
| 1631 | while (text < stop) { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1632 | const SkGlyph& glyph = glyphCacheProc(cache, &text, fx & fxMask, fy & fyMask); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1633 | |
| 1634 | fx += autokern.adjust(glyph); |
| 1635 | |
| 1636 | if (glyph.fWidth) { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1637 | proc(d1g, fx, fy, glyph); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1638 | } |
| 1639 | fx += glyph.fAdvanceX; |
| 1640 | fy += glyph.fAdvanceY; |
| 1641 | } |
| 1642 | |
| 1643 | if (underlineWidth) { |
| 1644 | autoCache.release(); // release this now to free up the RAM |
| 1645 | handle_aftertext(this, paint, underlineWidth, underlineStart); |
| 1646 | } |
| 1647 | } |
| 1648 | |
| 1649 | // last parameter is interpreted as SkFixed [x, y] |
| 1650 | // return the fixed position, which may be rounded or not by the caller |
| 1651 | // e.g. subpixel doesn't round |
| 1652 | typedef void (*AlignProc)(const SkPoint&, const SkGlyph&, SkIPoint*); |
| 1653 | |
| 1654 | static void leftAlignProc(const SkPoint& loc, const SkGlyph& glyph, |
| 1655 | SkIPoint* dst) { |
| 1656 | dst->set(SkScalarToFixed(loc.fX), SkScalarToFixed(loc.fY)); |
| 1657 | } |
| 1658 | |
| 1659 | static void centerAlignProc(const SkPoint& loc, const SkGlyph& glyph, |
| 1660 | SkIPoint* dst) { |
| 1661 | dst->set(SkScalarToFixed(loc.fX) - (glyph.fAdvanceX >> 1), |
| 1662 | SkScalarToFixed(loc.fY) - (glyph.fAdvanceY >> 1)); |
| 1663 | } |
| 1664 | |
| 1665 | static void rightAlignProc(const SkPoint& loc, const SkGlyph& glyph, |
| 1666 | SkIPoint* dst) { |
| 1667 | dst->set(SkScalarToFixed(loc.fX) - glyph.fAdvanceX, |
| 1668 | SkScalarToFixed(loc.fY) - glyph.fAdvanceY); |
| 1669 | } |
| 1670 | |
| 1671 | static AlignProc pick_align_proc(SkPaint::Align align) { |
| 1672 | static const AlignProc gProcs[] = { |
| 1673 | leftAlignProc, centerAlignProc, rightAlignProc |
| 1674 | }; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1675 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1676 | SkASSERT((unsigned)align < SK_ARRAY_COUNT(gProcs)); |
| 1677 | |
| 1678 | return gProcs[align]; |
| 1679 | } |
| 1680 | |
| 1681 | class TextMapState { |
| 1682 | public: |
| 1683 | mutable SkPoint fLoc; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1684 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1685 | TextMapState(const SkMatrix& matrix, SkScalar y) |
| 1686 | : fMatrix(matrix), fProc(matrix.getMapXYProc()), fY(y) {} |
| 1687 | |
| 1688 | typedef void (*Proc)(const TextMapState&, const SkScalar pos[]); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1689 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1690 | Proc pickProc(int scalarsPerPosition); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1691 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1692 | private: |
| 1693 | const SkMatrix& fMatrix; |
| 1694 | SkMatrix::MapXYProc fProc; |
| 1695 | SkScalar fY; // ignored by MapXYProc |
| 1696 | // these are only used by Only... procs |
| 1697 | SkScalar fScaleX, fTransX, fTransformedY; |
| 1698 | |
| 1699 | static void MapXProc(const TextMapState& state, const SkScalar pos[]) { |
| 1700 | state.fProc(state.fMatrix, *pos, state.fY, &state.fLoc); |
| 1701 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1702 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1703 | static void MapXYProc(const TextMapState& state, const SkScalar pos[]) { |
| 1704 | state.fProc(state.fMatrix, pos[0], pos[1], &state.fLoc); |
| 1705 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1706 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1707 | static void MapOnlyScaleXProc(const TextMapState& state, |
| 1708 | const SkScalar pos[]) { |
| 1709 | state.fLoc.set(SkScalarMul(state.fScaleX, *pos) + state.fTransX, |
| 1710 | state.fTransformedY); |
| 1711 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1712 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1713 | static void MapOnlyTransXProc(const TextMapState& state, |
| 1714 | const SkScalar pos[]) { |
| 1715 | state.fLoc.set(*pos + state.fTransX, state.fTransformedY); |
| 1716 | } |
| 1717 | }; |
| 1718 | |
| 1719 | TextMapState::Proc TextMapState::pickProc(int scalarsPerPosition) { |
| 1720 | SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1721 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1722 | if (1 == scalarsPerPosition) { |
| 1723 | unsigned mtype = fMatrix.getType(); |
| 1724 | if (mtype & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)) { |
| 1725 | return MapXProc; |
| 1726 | } else { |
| 1727 | fScaleX = fMatrix.getScaleX(); |
| 1728 | fTransX = fMatrix.getTranslateX(); |
| 1729 | fTransformedY = SkScalarMul(fY, fMatrix.getScaleY()) + |
| 1730 | fMatrix.getTranslateY(); |
| 1731 | return (mtype & SkMatrix::kScale_Mask) ? |
| 1732 | MapOnlyScaleXProc : MapOnlyTransXProc; |
| 1733 | } |
| 1734 | } else { |
| 1735 | return MapXYProc; |
| 1736 | } |
| 1737 | } |
| 1738 | |
| 1739 | ////////////////////////////////////////////////////////////////////////////// |
| 1740 | |
| 1741 | void SkDraw::drawPosText(const char text[], size_t byteLength, |
| 1742 | const SkScalar pos[], SkScalar constY, |
| 1743 | int scalarsPerPosition, const SkPaint& paint) const { |
| 1744 | SkASSERT(byteLength == 0 || text != NULL); |
| 1745 | SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition); |
| 1746 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1747 | SkDEBUGCODE(this->validate();) |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1748 | |
| 1749 | // nothing to draw |
| 1750 | if (text == NULL || byteLength == 0 || |
| 1751 | fClip->isEmpty() || |
| 1752 | (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) { |
| 1753 | return; |
| 1754 | } |
| 1755 | |
| 1756 | if (/*paint.isLinearText() ||*/ |
tomhudson@google.com | 8d43018 | 2011-06-06 19:11:19 +0000 | [diff] [blame] | 1757 | (fMatrix->hasPerspective())) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1758 | // TODO !!!! |
| 1759 | // this->drawText_asPaths(text, byteLength, x, y, paint); |
| 1760 | return; |
| 1761 | } |
| 1762 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1763 | const SkMatrix* matrix = fMatrix; |
reed@google.com | 1d6ee0b | 2011-07-05 17:44:56 +0000 | [diff] [blame] | 1764 | if (hasCustomD1GProc(*this)) { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1765 | // only support the fMVMatrix (for now) for the GPU case, which also |
| 1766 | // sets the fD1GProc |
| 1767 | if (fMVMatrix) { |
| 1768 | matrix = fMVMatrix; |
| 1769 | } |
| 1770 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1771 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1772 | SkDrawCacheProc glyphCacheProc = paint.getDrawCacheProc(); |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1773 | SkAutoGlyphCache autoCache(paint, matrix); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1774 | SkGlyphCache* cache = autoCache.getCache(); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1775 | |
reed@google.com | 1d6ee0b | 2011-07-05 17:44:56 +0000 | [diff] [blame] | 1776 | SkAutoBlitterChoose blitter; |
| 1777 | if (needsRasterTextBlit(*this)) { |
| 1778 | blitter.choose(*fBitmap, *matrix, paint); |
| 1779 | } |
| 1780 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1781 | const char* stop = text + byteLength; |
| 1782 | AlignProc alignProc = pick_align_proc(paint.getTextAlign()); |
| 1783 | SkDraw1Glyph d1g; |
| 1784 | SkDraw1Glyph::Proc proc = d1g.init(this, blitter.get(), cache); |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1785 | TextMapState tms(*matrix, constY); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1786 | TextMapState::Proc tmsProc = tms.pickProc(scalarsPerPosition); |
| 1787 | |
| 1788 | if (paint.isSubpixelText()) { |
| 1789 | // maybe we should skip the rounding if linearText is set |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1790 | RoundBaseline roundBaseline = computeRoundBaseline(*matrix); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1791 | |
| 1792 | if (SkPaint::kLeft_Align == paint.getTextAlign()) { |
| 1793 | while (text < stop) { |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1794 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1795 | tmsProc(tms, pos); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1796 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1797 | SkFixed fx = SkScalarToFixed(tms.fLoc.fX); |
| 1798 | SkFixed fy = SkScalarToFixed(tms.fLoc.fY); |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1799 | SkFixed fxMask = ~0; |
| 1800 | SkFixed fyMask = ~0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1801 | |
| 1802 | if (kRound_Y_Baseline == roundBaseline) { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1803 | fyMask = 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1804 | } else if (kRound_X_Baseline == roundBaseline) { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1805 | fxMask = 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1806 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1807 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1808 | const SkGlyph& glyph = glyphCacheProc(cache, &text, |
| 1809 | fx & fxMask, fy & fyMask); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1810 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1811 | if (glyph.fWidth) { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1812 | proc(d1g, fx, fy, glyph); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1813 | } |
| 1814 | pos += scalarsPerPosition; |
| 1815 | } |
| 1816 | } else { |
| 1817 | while (text < stop) { |
| 1818 | const SkGlyph* glyph = &glyphCacheProc(cache, &text, 0, 0); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1819 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1820 | if (glyph->fWidth) { |
| 1821 | SkDEBUGCODE(SkFixed prevAdvX = glyph->fAdvanceX;) |
| 1822 | SkDEBUGCODE(SkFixed prevAdvY = glyph->fAdvanceY;) |
| 1823 | |
| 1824 | SkFixed fx, fy; |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1825 | SkFixed fxMask = ~0; |
| 1826 | SkFixed fyMask = ~0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1827 | tmsProc(tms, pos); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1828 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1829 | { |
| 1830 | SkIPoint fixedLoc; |
| 1831 | alignProc(tms.fLoc, *glyph, &fixedLoc); |
| 1832 | fx = fixedLoc.fX; |
| 1833 | fy = fixedLoc.fY; |
| 1834 | |
| 1835 | if (kRound_Y_Baseline == roundBaseline) { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1836 | fyMask = 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1837 | } else if (kRound_X_Baseline == roundBaseline) { |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1838 | fxMask = 0; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1839 | } |
| 1840 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1841 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1842 | // have to call again, now that we've been "aligned" |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1843 | glyph = &glyphCacheProc(cache, &text, fx & fxMask, fy & fyMask); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1844 | // the assumption is that the advance hasn't changed |
| 1845 | SkASSERT(prevAdvX == glyph->fAdvanceX); |
| 1846 | SkASSERT(prevAdvY == glyph->fAdvanceY); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1847 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1848 | proc(d1g, fx, fy, *glyph); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1849 | } |
| 1850 | pos += scalarsPerPosition; |
| 1851 | } |
| 1852 | } |
| 1853 | } else { // not subpixel |
| 1854 | while (text < stop) { |
| 1855 | // the last 2 parameters are ignored |
| 1856 | const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1857 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1858 | if (glyph.fWidth) { |
| 1859 | tmsProc(tms, pos); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1860 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1861 | SkIPoint fixedLoc; |
| 1862 | alignProc(tms.fLoc, glyph, &fixedLoc); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1863 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1864 | proc(d1g, fixedLoc.fX + SK_FixedHalf, |
| 1865 | fixedLoc.fY + SK_FixedHalf, glyph); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1866 | } |
| 1867 | pos += scalarsPerPosition; |
| 1868 | } |
| 1869 | } |
| 1870 | } |
| 1871 | |
| 1872 | #if defined _WIN32 && _MSC_VER >= 1300 |
| 1873 | #pragma warning ( pop ) |
| 1874 | #endif |
| 1875 | |
| 1876 | /////////////////////////////////////////////////////////////////////////////// |
| 1877 | |
| 1878 | #include "SkPathMeasure.h" |
| 1879 | |
| 1880 | static void morphpoints(SkPoint dst[], const SkPoint src[], int count, |
| 1881 | SkPathMeasure& meas, const SkMatrix& matrix) { |
| 1882 | SkMatrix::MapXYProc proc = matrix.getMapXYProc(); |
| 1883 | |
| 1884 | for (int i = 0; i < count; i++) { |
| 1885 | SkPoint pos; |
| 1886 | SkVector tangent; |
| 1887 | |
| 1888 | proc(matrix, src[i].fX, src[i].fY, &pos); |
| 1889 | SkScalar sx = pos.fX; |
| 1890 | SkScalar sy = pos.fY; |
| 1891 | |
| 1892 | meas.getPosTan(sx, &pos, &tangent); |
| 1893 | |
| 1894 | /* This is the old way (that explains our approach but is way too slow |
| 1895 | SkMatrix matrix; |
| 1896 | SkPoint pt; |
| 1897 | |
| 1898 | pt.set(sx, sy); |
| 1899 | matrix.setSinCos(tangent.fY, tangent.fX); |
| 1900 | matrix.preTranslate(-sx, 0); |
| 1901 | matrix.postTranslate(pos.fX, pos.fY); |
| 1902 | matrix.mapPoints(&dst[i], &pt, 1); |
| 1903 | */ |
| 1904 | dst[i].set(pos.fX - SkScalarMul(tangent.fY, sy), |
| 1905 | pos.fY + SkScalarMul(tangent.fX, sy)); |
| 1906 | } |
| 1907 | } |
| 1908 | |
| 1909 | /* TODO |
| 1910 | |
| 1911 | Need differentially more subdivisions when the follow-path is curvy. Not sure how to |
| 1912 | determine that, but we need it. I guess a cheap answer is let the caller tell us, |
| 1913 | but that seems like a cop-out. Another answer is to get Rob Johnson to figure it out. |
| 1914 | */ |
| 1915 | static void morphpath(SkPath* dst, const SkPath& src, SkPathMeasure& meas, |
| 1916 | const SkMatrix& matrix) { |
| 1917 | SkPath::Iter iter(src, false); |
| 1918 | SkPoint srcP[4], dstP[3]; |
| 1919 | SkPath::Verb verb; |
| 1920 | |
| 1921 | while ((verb = iter.next(srcP)) != SkPath::kDone_Verb) { |
| 1922 | switch (verb) { |
| 1923 | case SkPath::kMove_Verb: |
| 1924 | morphpoints(dstP, srcP, 1, meas, matrix); |
| 1925 | dst->moveTo(dstP[0]); |
| 1926 | break; |
| 1927 | case SkPath::kLine_Verb: |
| 1928 | // turn lines into quads to look bendy |
| 1929 | srcP[0].fX = SkScalarAve(srcP[0].fX, srcP[1].fX); |
| 1930 | srcP[0].fY = SkScalarAve(srcP[0].fY, srcP[1].fY); |
| 1931 | morphpoints(dstP, srcP, 2, meas, matrix); |
| 1932 | dst->quadTo(dstP[0], dstP[1]); |
| 1933 | break; |
| 1934 | case SkPath::kQuad_Verb: |
| 1935 | morphpoints(dstP, &srcP[1], 2, meas, matrix); |
| 1936 | dst->quadTo(dstP[0], dstP[1]); |
| 1937 | break; |
| 1938 | case SkPath::kCubic_Verb: |
| 1939 | morphpoints(dstP, &srcP[1], 3, meas, matrix); |
| 1940 | dst->cubicTo(dstP[0], dstP[1], dstP[2]); |
| 1941 | break; |
| 1942 | case SkPath::kClose_Verb: |
| 1943 | dst->close(); |
| 1944 | break; |
| 1945 | default: |
| 1946 | SkASSERT(!"unknown verb"); |
| 1947 | break; |
| 1948 | } |
| 1949 | } |
| 1950 | } |
| 1951 | |
| 1952 | void SkDraw::drawTextOnPath(const char text[], size_t byteLength, |
| 1953 | const SkPath& follow, const SkMatrix* matrix, |
| 1954 | const SkPaint& paint) const { |
| 1955 | SkASSERT(byteLength == 0 || text != NULL); |
| 1956 | |
| 1957 | // nothing to draw |
| 1958 | if (text == NULL || byteLength == 0 || |
| 1959 | fClip->isEmpty() || |
| 1960 | (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) { |
| 1961 | return; |
| 1962 | } |
| 1963 | |
| 1964 | SkTextToPathIter iter(text, byteLength, paint, true, true); |
| 1965 | SkPathMeasure meas(follow, false); |
| 1966 | SkScalar hOffset = 0; |
| 1967 | |
| 1968 | // need to measure first |
| 1969 | if (paint.getTextAlign() != SkPaint::kLeft_Align) { |
| 1970 | SkScalar pathLen = meas.getLength(); |
| 1971 | if (paint.getTextAlign() == SkPaint::kCenter_Align) { |
| 1972 | pathLen = SkScalarHalf(pathLen); |
| 1973 | } |
| 1974 | hOffset += pathLen; |
| 1975 | } |
| 1976 | |
| 1977 | const SkPath* iterPath; |
| 1978 | SkScalar xpos; |
| 1979 | SkMatrix scaledMatrix; |
| 1980 | SkScalar scale = iter.getPathScale(); |
| 1981 | |
| 1982 | scaledMatrix.setScale(scale, scale); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 1983 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1984 | while ((iterPath = iter.next(&xpos)) != NULL) { |
| 1985 | SkPath tmp; |
| 1986 | SkMatrix m(scaledMatrix); |
| 1987 | |
| 1988 | m.postTranslate(xpos + hOffset, 0); |
| 1989 | if (matrix) { |
| 1990 | m.postConcat(*matrix); |
| 1991 | } |
| 1992 | morphpath(&tmp, *iterPath, meas, m); |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 1993 | if (fDevice) { |
| 1994 | fDevice->drawPath(*this, tmp, iter.getPaint(), NULL, true); |
| 1995 | } else { |
| 1996 | this->drawPath(tmp, iter.getPaint(), NULL, true); |
| 1997 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 1998 | } |
| 1999 | } |
| 2000 | |
djsollen@google.com | cd9d69b | 2011-03-14 20:30:14 +0000 | [diff] [blame] | 2001 | #ifdef ANDROID |
| 2002 | void SkDraw::drawPosTextOnPath(const char text[], size_t byteLength, |
| 2003 | const SkPoint pos[], const SkPaint& paint, |
| 2004 | const SkPath& path, const SkMatrix* matrix) const { |
| 2005 | // nothing to draw |
| 2006 | if (text == NULL || byteLength == 0 || fClip->isEmpty() || |
| 2007 | (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) { |
| 2008 | return; |
| 2009 | } |
| 2010 | |
| 2011 | SkMatrix scaledMatrix; |
| 2012 | SkPathMeasure meas(path, false); |
| 2013 | |
| 2014 | SkMeasureCacheProc glyphCacheProc = paint.getMeasureCacheProc( |
| 2015 | SkPaint::kForward_TextBufferDirection, true); |
| 2016 | |
| 2017 | // Copied (modified) from SkTextToPathIter constructor to setup paint |
| 2018 | SkPaint tempPaint(paint); |
| 2019 | |
| 2020 | tempPaint.setLinearText(true); |
| 2021 | tempPaint.setMaskFilter(NULL); // don't want this affecting our path-cache lookup |
| 2022 | |
| 2023 | if (tempPaint.getPathEffect() == NULL && !(tempPaint.getStrokeWidth() > 0 |
| 2024 | && tempPaint.getStyle() != SkPaint::kFill_Style)) { |
| 2025 | tempPaint.setStyle(SkPaint::kFill_Style); |
| 2026 | tempPaint.setPathEffect(NULL); |
| 2027 | } |
| 2028 | // End copied from SkTextToPathIter constructor |
| 2029 | |
| 2030 | // detach cache |
| 2031 | SkGlyphCache* cache = tempPaint.detachCache(NULL); |
| 2032 | |
| 2033 | // Must set scale, even if 1 |
| 2034 | SkScalar scale = SK_Scalar1; |
| 2035 | scaledMatrix.setScale(scale, scale); |
| 2036 | |
| 2037 | // Loop over all glyph ids |
| 2038 | for (const char* stop = text + byteLength; text < stop; pos++) { |
| 2039 | |
| 2040 | const SkGlyph& glyph = glyphCacheProc(cache, &text); |
| 2041 | SkPath tmp; |
| 2042 | |
| 2043 | const SkPath* glyphPath = cache->findPath(glyph); |
| 2044 | if (glyphPath == NULL) { |
| 2045 | continue; |
| 2046 | } |
| 2047 | |
| 2048 | SkMatrix m(scaledMatrix); |
| 2049 | m.postTranslate(pos->fX, 0); |
| 2050 | |
| 2051 | if (matrix) { |
| 2052 | m.postConcat(*matrix); |
| 2053 | } |
| 2054 | |
| 2055 | morphpath(&tmp, *glyphPath, meas, m); |
| 2056 | this->drawPath(tmp, tempPaint); |
| 2057 | |
| 2058 | } |
| 2059 | |
| 2060 | // re-attach cache |
| 2061 | SkGlyphCache::AttachCache(cache); |
| 2062 | } |
| 2063 | #endif |
| 2064 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2065 | /////////////////////////////////////////////////////////////////////////////// |
| 2066 | |
| 2067 | struct VertState { |
| 2068 | int f0, f1, f2; |
| 2069 | |
| 2070 | VertState(int vCount, const uint16_t indices[], int indexCount) |
| 2071 | : fIndices(indices) { |
| 2072 | fCurrIndex = 0; |
| 2073 | if (indices) { |
| 2074 | fCount = indexCount; |
| 2075 | } else { |
| 2076 | fCount = vCount; |
| 2077 | } |
| 2078 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2079 | |
| 2080 | typedef bool (*Proc)(VertState*); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2081 | Proc chooseProc(SkCanvas::VertexMode mode); |
| 2082 | |
| 2083 | private: |
| 2084 | int fCount; |
| 2085 | int fCurrIndex; |
| 2086 | const uint16_t* fIndices; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2087 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2088 | static bool Triangles(VertState*); |
| 2089 | static bool TrianglesX(VertState*); |
| 2090 | static bool TriangleStrip(VertState*); |
| 2091 | static bool TriangleStripX(VertState*); |
| 2092 | static bool TriangleFan(VertState*); |
| 2093 | static bool TriangleFanX(VertState*); |
| 2094 | }; |
| 2095 | |
| 2096 | bool VertState::Triangles(VertState* state) { |
| 2097 | int index = state->fCurrIndex; |
| 2098 | if (index + 3 > state->fCount) { |
| 2099 | return false; |
| 2100 | } |
| 2101 | state->f0 = index + 0; |
| 2102 | state->f1 = index + 1; |
| 2103 | state->f2 = index + 2; |
| 2104 | state->fCurrIndex = index + 3; |
| 2105 | return true; |
| 2106 | } |
| 2107 | |
| 2108 | bool VertState::TrianglesX(VertState* state) { |
| 2109 | const uint16_t* indices = state->fIndices; |
| 2110 | int index = state->fCurrIndex; |
| 2111 | if (index + 3 > state->fCount) { |
| 2112 | return false; |
| 2113 | } |
| 2114 | state->f0 = indices[index + 0]; |
| 2115 | state->f1 = indices[index + 1]; |
| 2116 | state->f2 = indices[index + 2]; |
| 2117 | state->fCurrIndex = index + 3; |
| 2118 | return true; |
| 2119 | } |
| 2120 | |
| 2121 | bool VertState::TriangleStrip(VertState* state) { |
| 2122 | int index = state->fCurrIndex; |
| 2123 | if (index + 3 > state->fCount) { |
| 2124 | return false; |
| 2125 | } |
| 2126 | state->f2 = index + 2; |
| 2127 | if (index & 1) { |
| 2128 | state->f0 = index + 1; |
| 2129 | state->f1 = index + 0; |
| 2130 | } else { |
| 2131 | state->f0 = index + 0; |
| 2132 | state->f1 = index + 1; |
| 2133 | } |
| 2134 | state->fCurrIndex = index + 1; |
| 2135 | return true; |
| 2136 | } |
| 2137 | |
| 2138 | bool VertState::TriangleStripX(VertState* state) { |
| 2139 | const uint16_t* indices = state->fIndices; |
| 2140 | int index = state->fCurrIndex; |
| 2141 | if (index + 3 > state->fCount) { |
| 2142 | return false; |
| 2143 | } |
| 2144 | state->f2 = indices[index + 2]; |
| 2145 | if (index & 1) { |
| 2146 | state->f0 = indices[index + 1]; |
| 2147 | state->f1 = indices[index + 0]; |
| 2148 | } else { |
| 2149 | state->f0 = indices[index + 0]; |
| 2150 | state->f1 = indices[index + 1]; |
| 2151 | } |
| 2152 | state->fCurrIndex = index + 1; |
| 2153 | return true; |
| 2154 | } |
| 2155 | |
| 2156 | bool VertState::TriangleFan(VertState* state) { |
| 2157 | int index = state->fCurrIndex; |
| 2158 | if (index + 3 > state->fCount) { |
| 2159 | return false; |
| 2160 | } |
| 2161 | state->f0 = 0; |
| 2162 | state->f1 = index + 1; |
| 2163 | state->f2 = index + 2; |
| 2164 | state->fCurrIndex = index + 1; |
| 2165 | return true; |
| 2166 | } |
| 2167 | |
| 2168 | bool VertState::TriangleFanX(VertState* state) { |
| 2169 | const uint16_t* indices = state->fIndices; |
| 2170 | int index = state->fCurrIndex; |
| 2171 | if (index + 3 > state->fCount) { |
| 2172 | return false; |
| 2173 | } |
| 2174 | state->f0 = indices[0]; |
| 2175 | state->f1 = indices[index + 1]; |
| 2176 | state->f2 = indices[index + 2]; |
| 2177 | state->fCurrIndex = index + 1; |
| 2178 | return true; |
| 2179 | } |
| 2180 | |
| 2181 | VertState::Proc VertState::chooseProc(SkCanvas::VertexMode mode) { |
| 2182 | switch (mode) { |
| 2183 | case SkCanvas::kTriangles_VertexMode: |
| 2184 | return fIndices ? TrianglesX : Triangles; |
| 2185 | case SkCanvas::kTriangleStrip_VertexMode: |
| 2186 | return fIndices ? TriangleStripX : TriangleStrip; |
| 2187 | case SkCanvas::kTriangleFan_VertexMode: |
| 2188 | return fIndices ? TriangleFanX : TriangleFan; |
| 2189 | default: |
| 2190 | return NULL; |
| 2191 | } |
| 2192 | } |
| 2193 | |
| 2194 | typedef void (*HairProc)(const SkPoint&, const SkPoint&, const SkRegion*, |
| 2195 | SkBlitter*); |
| 2196 | |
| 2197 | static HairProc ChooseHairProc(bool doAntiAlias) { |
| 2198 | return doAntiAlias ? SkScan::AntiHairLine : SkScan::HairLine; |
| 2199 | } |
| 2200 | |
| 2201 | static bool texture_to_matrix(const VertState& state, const SkPoint verts[], |
| 2202 | const SkPoint texs[], SkMatrix* matrix) { |
| 2203 | SkPoint src[3], dst[3]; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2204 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2205 | src[0] = texs[state.f0]; |
| 2206 | src[1] = texs[state.f1]; |
| 2207 | src[2] = texs[state.f2]; |
| 2208 | dst[0] = verts[state.f0]; |
| 2209 | dst[1] = verts[state.f1]; |
| 2210 | dst[2] = verts[state.f2]; |
| 2211 | return matrix->setPolyToPoly(src, dst, 3); |
| 2212 | } |
| 2213 | |
| 2214 | class SkTriColorShader : public SkShader { |
| 2215 | public: |
| 2216 | SkTriColorShader() {} |
| 2217 | |
| 2218 | bool setup(const SkPoint pts[], const SkColor colors[], int, int, int); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2219 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2220 | virtual void shadeSpan(int x, int y, SkPMColor dstC[], int count); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2221 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2222 | protected: |
| 2223 | SkTriColorShader(SkFlattenableReadBuffer& buffer) : SkShader(buffer) {} |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2224 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2225 | virtual Factory getFactory() { return CreateProc; } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2226 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2227 | private: |
| 2228 | SkMatrix fDstToUnit; |
| 2229 | SkPMColor fColors[3]; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2230 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2231 | static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) { |
| 2232 | return SkNEW_ARGS(SkTriColorShader, (buffer)); |
| 2233 | } |
| 2234 | typedef SkShader INHERITED; |
| 2235 | }; |
| 2236 | |
| 2237 | bool SkTriColorShader::setup(const SkPoint pts[], const SkColor colors[], |
| 2238 | int index0, int index1, int index2) { |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2239 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2240 | fColors[0] = SkPreMultiplyColor(colors[index0]); |
| 2241 | fColors[1] = SkPreMultiplyColor(colors[index1]); |
| 2242 | fColors[2] = SkPreMultiplyColor(colors[index2]); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2243 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2244 | SkMatrix m, im; |
| 2245 | m.reset(); |
| 2246 | m.set(0, pts[index1].fX - pts[index0].fX); |
| 2247 | m.set(1, pts[index2].fX - pts[index0].fX); |
| 2248 | m.set(2, pts[index0].fX); |
| 2249 | m.set(3, pts[index1].fY - pts[index0].fY); |
| 2250 | m.set(4, pts[index2].fY - pts[index0].fY); |
| 2251 | m.set(5, pts[index0].fY); |
| 2252 | if (!m.invert(&im)) { |
| 2253 | return false; |
| 2254 | } |
| 2255 | return fDstToUnit.setConcat(im, this->getTotalInverse()); |
| 2256 | } |
| 2257 | |
| 2258 | #include "SkColorPriv.h" |
reed@android.com | 689411a | 2008-12-18 02:52:32 +0000 | [diff] [blame] | 2259 | #include "SkComposeShader.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2260 | |
| 2261 | static int ScalarTo256(SkScalar v) { |
| 2262 | int scale = SkScalarToFixed(v) >> 8; |
| 2263 | if (scale < 0) { |
| 2264 | scale = 0; |
| 2265 | } |
| 2266 | if (scale > 255) { |
| 2267 | scale = 255; |
| 2268 | } |
| 2269 | return SkAlpha255To256(scale); |
| 2270 | } |
| 2271 | |
| 2272 | void SkTriColorShader::shadeSpan(int x, int y, SkPMColor dstC[], int count) { |
| 2273 | SkPoint src; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2274 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2275 | for (int i = 0; i < count; i++) { |
| 2276 | fDstToUnit.mapXY(SkIntToScalar(x), SkIntToScalar(y), &src); |
| 2277 | x += 1; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2278 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2279 | int scale1 = ScalarTo256(src.fX); |
| 2280 | int scale2 = ScalarTo256(src.fY); |
| 2281 | int scale0 = 256 - scale1 - scale2; |
| 2282 | if (scale0 < 0) { |
| 2283 | if (scale1 > scale2) { |
| 2284 | scale2 = 256 - scale1; |
| 2285 | } else { |
| 2286 | scale1 = 256 - scale2; |
| 2287 | } |
| 2288 | scale0 = 0; |
| 2289 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2290 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2291 | dstC[i] = SkAlphaMulQ(fColors[0], scale0) + |
| 2292 | SkAlphaMulQ(fColors[1], scale1) + |
| 2293 | SkAlphaMulQ(fColors[2], scale2); |
| 2294 | } |
| 2295 | } |
| 2296 | |
| 2297 | void SkDraw::drawVertices(SkCanvas::VertexMode vmode, int count, |
| 2298 | const SkPoint vertices[], const SkPoint textures[], |
| 2299 | const SkColor colors[], SkXfermode* xmode, |
| 2300 | const uint16_t indices[], int indexCount, |
| 2301 | const SkPaint& paint) const { |
| 2302 | SkASSERT(0 == count || NULL != vertices); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2303 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2304 | // abort early if there is nothing to draw |
| 2305 | if (count < 3 || (indices && indexCount < 3) || fClip->isEmpty() || |
| 2306 | (paint.getAlpha() == 0 && paint.getXfermode() == NULL)) { |
| 2307 | return; |
| 2308 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2309 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2310 | // transform out vertices into device coordinates |
| 2311 | SkAutoSTMalloc<16, SkPoint> storage(count); |
| 2312 | SkPoint* devVerts = storage.get(); |
| 2313 | fMatrix->mapPoints(devVerts, vertices, count); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2314 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2315 | if (fBounder) { |
| 2316 | SkRect bounds; |
| 2317 | bounds.set(devVerts, count); |
| 2318 | if (!fBounder->doRect(bounds, paint)) { |
| 2319 | return; |
| 2320 | } |
| 2321 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2322 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2323 | /* |
| 2324 | We can draw the vertices in 1 of 4 ways: |
| 2325 | |
| 2326 | - solid color (no shader/texture[], no colors[]) |
| 2327 | - just colors (no shader/texture[], has colors[]) |
| 2328 | - just texture (has shader/texture[], no colors[]) |
| 2329 | - colors * texture (has shader/texture[], has colors[]) |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2330 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2331 | Thus for texture drawing, we need both texture[] and a shader. |
| 2332 | */ |
| 2333 | |
| 2334 | SkTriColorShader triShader; // must be above declaration of p |
| 2335 | SkPaint p(paint); |
| 2336 | |
| 2337 | SkShader* shader = p.getShader(); |
| 2338 | if (NULL == shader) { |
| 2339 | // if we have no shader, we ignore the texture coordinates |
| 2340 | textures = NULL; |
| 2341 | } else if (NULL == textures) { |
| 2342 | // if we don't have texture coordinates, ignore the shader |
| 2343 | p.setShader(NULL); |
| 2344 | shader = NULL; |
| 2345 | } |
| 2346 | |
| 2347 | // setup the custom shader (if needed) |
| 2348 | if (NULL != colors) { |
| 2349 | if (NULL == textures) { |
| 2350 | // just colors (no texture) |
| 2351 | p.setShader(&triShader); |
| 2352 | } else { |
| 2353 | // colors * texture |
| 2354 | SkASSERT(shader); |
| 2355 | bool releaseMode = false; |
| 2356 | if (NULL == xmode) { |
reed@android.com | 845fdac | 2009-06-23 03:01:32 +0000 | [diff] [blame] | 2357 | xmode = SkXfermode::Create(SkXfermode::kMultiply_Mode); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2358 | releaseMode = true; |
| 2359 | } |
| 2360 | SkShader* compose = SkNEW_ARGS(SkComposeShader, |
| 2361 | (&triShader, shader, xmode)); |
| 2362 | p.setShader(compose)->unref(); |
| 2363 | if (releaseMode) { |
| 2364 | xmode->unref(); |
| 2365 | } |
| 2366 | } |
| 2367 | } |
| 2368 | |
| 2369 | SkAutoBlitterChoose blitter(*fBitmap, *fMatrix, p); |
| 2370 | // setup our state and function pointer for iterating triangles |
| 2371 | VertState state(count, indices, indexCount); |
| 2372 | VertState::Proc vertProc = state.chooseProc(vmode); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2373 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2374 | if (NULL != textures || NULL != colors) { |
| 2375 | SkMatrix localM, tempM; |
| 2376 | bool hasLocalM = shader && shader->getLocalMatrix(&localM); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2377 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2378 | if (NULL != colors) { |
| 2379 | if (!triShader.setContext(*fBitmap, p, *fMatrix)) { |
| 2380 | colors = NULL; |
| 2381 | } |
| 2382 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2383 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2384 | while (vertProc(&state)) { |
| 2385 | if (NULL != textures) { |
| 2386 | if (texture_to_matrix(state, vertices, textures, &tempM)) { |
| 2387 | if (hasLocalM) { |
| 2388 | tempM.postConcat(localM); |
| 2389 | } |
| 2390 | shader->setLocalMatrix(tempM); |
| 2391 | // need to recal setContext since we changed the local matrix |
| 2392 | if (!shader->setContext(*fBitmap, p, *fMatrix)) { |
| 2393 | continue; |
| 2394 | } |
| 2395 | } |
| 2396 | } |
| 2397 | if (NULL != colors) { |
| 2398 | if (!triShader.setup(vertices, colors, |
| 2399 | state.f0, state.f1, state.f2)) { |
| 2400 | continue; |
| 2401 | } |
| 2402 | } |
| 2403 | SkScan::FillTriangle(devVerts[state.f0], devVerts[state.f1], |
| 2404 | devVerts[state.f2], fClip, blitter.get()); |
| 2405 | } |
| 2406 | // now restore the shader's original local matrix |
| 2407 | if (NULL != shader) { |
| 2408 | if (hasLocalM) { |
| 2409 | shader->setLocalMatrix(localM); |
| 2410 | } else { |
| 2411 | shader->resetLocalMatrix(); |
| 2412 | } |
| 2413 | } |
| 2414 | } else { |
| 2415 | // no colors[] and no texture |
| 2416 | HairProc hairProc = ChooseHairProc(paint.isAntiAlias()); |
| 2417 | while (vertProc(&state)) { |
| 2418 | hairProc(devVerts[state.f0], devVerts[state.f1], fClip, blitter.get()); |
| 2419 | hairProc(devVerts[state.f1], devVerts[state.f2], fClip, blitter.get()); |
| 2420 | hairProc(devVerts[state.f2], devVerts[state.f0], fClip, blitter.get()); |
| 2421 | } |
| 2422 | } |
| 2423 | } |
| 2424 | |
reed@google.com | 0a0a236 | 2011-03-23 13:51:55 +0000 | [diff] [blame] | 2425 | /////////////////////////////////////////////////////////////////////////////// |
| 2426 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2427 | |
| 2428 | #ifdef SK_DEBUG |
| 2429 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 2430 | void SkDraw::validate() const { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2431 | SkASSERT(fBitmap != NULL); |
| 2432 | SkASSERT(fMatrix != NULL); |
| 2433 | SkASSERT(fClip != NULL); |
| 2434 | |
| 2435 | const SkIRect& cr = fClip->getBounds(); |
| 2436 | SkIRect br; |
| 2437 | |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 2438 | br.set(0, 0, fBitmap->width(), fBitmap->height()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2439 | SkASSERT(cr.isEmpty() || br.contains(cr)); |
reed@android.com | f2b98d6 | 2010-12-20 18:26:13 +0000 | [diff] [blame] | 2440 | |
| 2441 | // assert that both are null, or both are not-null |
| 2442 | SkASSERT(!fMVMatrix == !fExtMatrix); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2443 | } |
| 2444 | |
| 2445 | #endif |
| 2446 | |
reed@google.com | 0a0a236 | 2011-03-23 13:51:55 +0000 | [diff] [blame] | 2447 | /////////////////////////////////////////////////////////////////////////////// |
| 2448 | |
| 2449 | SkBounder::SkBounder() { |
| 2450 | // initialize up front. This gets reset by SkCanvas before each draw call. |
| 2451 | fClip = &SkRegion::GetEmptyRegion(); |
| 2452 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2453 | |
| 2454 | bool SkBounder::doIRect(const SkIRect& r) { |
| 2455 | SkIRect rr; |
| 2456 | return rr.intersect(fClip->getBounds(), r) && this->onIRect(rr); |
| 2457 | } |
| 2458 | |
reed@android.com | d055c1f | 2010-03-01 14:54:05 +0000 | [diff] [blame] | 2459 | // TODO: change the prototype to take fixed, and update the callers |
| 2460 | bool SkBounder::doIRectGlyph(const SkIRect& r, int x, int y, |
| 2461 | const SkGlyph& glyph) { |
reed@android.com | 474a12c | 2010-01-04 19:35:33 +0000 | [diff] [blame] | 2462 | SkIRect rr; |
reed@android.com | d055c1f | 2010-03-01 14:54:05 +0000 | [diff] [blame] | 2463 | if (!rr.intersect(fClip->getBounds(), r)) { |
| 2464 | return false; |
| 2465 | } |
| 2466 | GlyphRec rec; |
| 2467 | rec.fLSB.set(SkIntToFixed(x), SkIntToFixed(y)); |
| 2468 | rec.fRSB.set(rec.fLSB.fX + glyph.fAdvanceX, |
| 2469 | rec.fLSB.fY + glyph.fAdvanceY); |
| 2470 | rec.fGlyphID = glyph.getGlyphID(); |
| 2471 | rec.fFlags = 0; |
| 2472 | return this->onIRectGlyph(rr, rec); |
reed@android.com | 474a12c | 2010-01-04 19:35:33 +0000 | [diff] [blame] | 2473 | } |
| 2474 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2475 | bool SkBounder::doHairline(const SkPoint& pt0, const SkPoint& pt1, |
| 2476 | const SkPaint& paint) { |
| 2477 | SkIRect r; |
| 2478 | SkScalar v0, v1; |
| 2479 | |
| 2480 | v0 = pt0.fX; |
| 2481 | v1 = pt1.fX; |
| 2482 | if (v0 > v1) { |
| 2483 | SkTSwap<SkScalar>(v0, v1); |
| 2484 | } |
| 2485 | r.fLeft = SkScalarFloor(v0); |
| 2486 | r.fRight = SkScalarCeil(v1); |
| 2487 | |
| 2488 | v0 = pt0.fY; |
| 2489 | v1 = pt1.fY; |
| 2490 | if (v0 > v1) { |
| 2491 | SkTSwap<SkScalar>(v0, v1); |
| 2492 | } |
| 2493 | r.fTop = SkScalarFloor(v0); |
| 2494 | r.fBottom = SkScalarCeil(v1); |
| 2495 | |
| 2496 | if (paint.isAntiAlias()) { |
| 2497 | r.inset(-1, -1); |
| 2498 | } |
| 2499 | return this->doIRect(r); |
| 2500 | } |
| 2501 | |
| 2502 | bool SkBounder::doRect(const SkRect& rect, const SkPaint& paint) { |
| 2503 | SkIRect r; |
| 2504 | |
| 2505 | if (paint.getStyle() == SkPaint::kFill_Style) { |
| 2506 | rect.round(&r); |
| 2507 | } else { |
| 2508 | int rad = -1; |
| 2509 | rect.roundOut(&r); |
| 2510 | if (paint.isAntiAlias()) { |
| 2511 | rad = -2; |
| 2512 | } |
| 2513 | r.inset(rad, rad); |
| 2514 | } |
| 2515 | return this->doIRect(r); |
| 2516 | } |
| 2517 | |
| 2518 | bool SkBounder::doPath(const SkPath& path, const SkPaint& paint, bool doFill) { |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 2519 | SkIRect r; |
| 2520 | const SkRect& bounds = path.getBounds(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2521 | |
| 2522 | if (doFill) { |
| 2523 | bounds.round(&r); |
| 2524 | } else { // hairline |
| 2525 | bounds.roundOut(&r); |
| 2526 | } |
| 2527 | |
| 2528 | if (paint.isAntiAlias()) { |
| 2529 | r.inset(-1, -1); |
| 2530 | } |
| 2531 | return this->doIRect(r); |
| 2532 | } |
| 2533 | |
| 2534 | void SkBounder::commit() { |
| 2535 | // override in subclass |
| 2536 | } |
| 2537 | |
| 2538 | //////////////////////////////////////////////////////////////////////////////////////////////// |
| 2539 | |
| 2540 | #include "SkPath.h" |
| 2541 | #include "SkDraw.h" |
| 2542 | #include "SkRegion.h" |
| 2543 | #include "SkBlitter.h" |
| 2544 | |
| 2545 | static bool compute_bounds(const SkPath& devPath, const SkIRect* clipBounds, |
| 2546 | SkMaskFilter* filter, const SkMatrix* filterMatrix, |
| 2547 | SkIRect* bounds) { |
| 2548 | if (devPath.isEmpty()) { |
| 2549 | return false; |
| 2550 | } |
| 2551 | |
| 2552 | SkIPoint margin; |
| 2553 | margin.set(0, 0); |
| 2554 | |
| 2555 | // init our bounds from the path |
| 2556 | { |
reed@android.com | d252db0 | 2009-04-01 18:31:44 +0000 | [diff] [blame] | 2557 | SkRect pathBounds = devPath.getBounds(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2558 | pathBounds.inset(-SK_ScalarHalf, -SK_ScalarHalf); |
| 2559 | pathBounds.roundOut(bounds); |
| 2560 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2561 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2562 | if (filter) { |
| 2563 | SkASSERT(filterMatrix); |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2564 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2565 | SkMask srcM, dstM; |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2566 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2567 | srcM.fBounds = *bounds; |
| 2568 | srcM.fFormat = SkMask::kA8_Format; |
| 2569 | srcM.fImage = NULL; |
| 2570 | if (!filter->filterMask(&dstM, srcM, *filterMatrix, &margin)) { |
| 2571 | return false; |
| 2572 | } |
| 2573 | *bounds = dstM.fBounds; |
| 2574 | } |
| 2575 | |
| 2576 | if (clipBounds && !SkIRect::Intersects(*clipBounds, *bounds)) { |
| 2577 | return false; |
| 2578 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2579 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2580 | // (possibly) trim the srcM bounds to reflect the clip |
| 2581 | // (plus whatever slop the filter needs) |
| 2582 | if (clipBounds && !clipBounds->contains(*bounds)) { |
| 2583 | SkIRect tmp = *bounds; |
| 2584 | (void)tmp.intersect(*clipBounds); |
reed@android.com | 3555591 | 2009-03-16 18:46:55 +0000 | [diff] [blame] | 2585 | // Ugh. Guard against gigantic margins from wacky filters. Without this |
| 2586 | // check we can request arbitrary amounts of slop beyond our visible |
| 2587 | // clip, and bring down the renderer (at least on finite RAM machines |
| 2588 | // like handsets, etc.). Need to balance this invented value between |
| 2589 | // quality of large filters like blurs, and the corresponding memory |
| 2590 | // requests. |
| 2591 | static const int MAX_MARGIN = 128; |
| 2592 | tmp.inset(-SkMin32(margin.fX, MAX_MARGIN), |
| 2593 | -SkMin32(margin.fY, MAX_MARGIN)); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2594 | (void)bounds->intersect(tmp); |
| 2595 | } |
| 2596 | |
| 2597 | return true; |
| 2598 | } |
| 2599 | |
| 2600 | static void draw_into_mask(const SkMask& mask, const SkPath& devPath) { |
| 2601 | SkBitmap bm; |
| 2602 | SkDraw draw; |
| 2603 | SkRegion clipRgn; |
| 2604 | SkMatrix matrix; |
| 2605 | SkPaint paint; |
| 2606 | |
| 2607 | bm.setConfig(SkBitmap::kA8_Config, mask.fBounds.width(), mask.fBounds.height(), mask.fRowBytes); |
| 2608 | bm.setPixels(mask.fImage); |
| 2609 | |
| 2610 | clipRgn.setRect(0, 0, mask.fBounds.width(), mask.fBounds.height()); |
| 2611 | matrix.setTranslate(-SkIntToScalar(mask.fBounds.fLeft), |
| 2612 | -SkIntToScalar(mask.fBounds.fTop)); |
| 2613 | |
| 2614 | draw.fBitmap = &bm; |
| 2615 | draw.fClip = &clipRgn; |
| 2616 | draw.fMatrix = &matrix; |
| 2617 | draw.fBounder = NULL; |
| 2618 | paint.setAntiAlias(true); |
| 2619 | draw.drawPath(devPath, paint); |
| 2620 | } |
| 2621 | |
| 2622 | bool SkDraw::DrawToMask(const SkPath& devPath, const SkIRect* clipBounds, |
| 2623 | SkMaskFilter* filter, const SkMatrix* filterMatrix, |
| 2624 | SkMask* mask, SkMask::CreateMode mode) { |
| 2625 | if (SkMask::kJustRenderImage_CreateMode != mode) { |
| 2626 | if (!compute_bounds(devPath, clipBounds, filter, filterMatrix, &mask->fBounds)) |
| 2627 | return false; |
| 2628 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2629 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2630 | if (SkMask::kComputeBoundsAndRenderImage_CreateMode == mode) { |
| 2631 | mask->fFormat = SkMask::kA8_Format; |
| 2632 | mask->fRowBytes = mask->fBounds.width(); |
reed@android.com | 543ed93 | 2009-04-24 12:43:40 +0000 | [diff] [blame] | 2633 | size_t size = mask->computeImageSize(); |
| 2634 | if (0 == size) { |
| 2635 | // we're too big to allocate the mask, abort |
| 2636 | return false; |
| 2637 | } |
| 2638 | mask->fImage = SkMask::AllocImage(size); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2639 | memset(mask->fImage, 0, mask->computeImageSize()); |
| 2640 | } |
| 2641 | |
| 2642 | if (SkMask::kJustComputeBounds_CreateMode != mode) { |
| 2643 | draw_into_mask(*mask, devPath); |
| 2644 | } |
reed@google.com | a76de3d | 2011-01-13 18:30:42 +0000 | [diff] [blame] | 2645 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 2646 | return true; |
| 2647 | } |