The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
| 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 |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 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 |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #define LOG_TAG "NinePatch" |
Dianne Hackborn | 8cae124 | 2009-09-10 14:32:16 -0700 | [diff] [blame] | 19 | #define LOG_NDEBUG 1 |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 20 | |
Mathias Agopian | b13b9bd | 2012-02-17 18:27:36 -0800 | [diff] [blame] | 21 | #include <androidfw/ResourceTypes.h> |
Dianne Hackborn | 8cae124 | 2009-09-10 14:32:16 -0700 | [diff] [blame] | 22 | #include <utils/Log.h> |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 23 | |
| 24 | #include "SkBitmap.h" |
| 25 | #include "SkCanvas.h" |
| 26 | #include "SkNinePatch.h" |
| 27 | #include "SkPaint.h" |
| 28 | #include "SkUnPreMultiply.h" |
| 29 | |
Dianne Hackborn | 8cae124 | 2009-09-10 14:32:16 -0700 | [diff] [blame] | 30 | #define USE_TRACE |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 31 | |
| 32 | #ifdef USE_TRACE |
| 33 | static bool gTrace; |
| 34 | #endif |
| 35 | |
| 36 | #include "SkColorPriv.h" |
| 37 | |
| 38 | #include <utils/Log.h> |
| 39 | |
| 40 | static bool getColor(const SkBitmap& bitmap, int x, int y, SkColor* c) { |
| 41 | switch (bitmap.getConfig()) { |
| 42 | case SkBitmap::kARGB_8888_Config: |
| 43 | *c = SkUnPreMultiply::PMColorToColor(*bitmap.getAddr32(x, y)); |
| 44 | break; |
| 45 | case SkBitmap::kRGB_565_Config: |
| 46 | *c = SkPixel16ToPixel32(*bitmap.getAddr16(x, y)); |
| 47 | break; |
| 48 | case SkBitmap::kARGB_4444_Config: |
| 49 | *c = SkUnPreMultiply::PMColorToColor( |
| 50 | SkPixel4444ToPixel32(*bitmap.getAddr16(x, y))); |
| 51 | break; |
| 52 | case SkBitmap::kIndex8_Config: { |
| 53 | SkColorTable* ctable = bitmap.getColorTable(); |
| 54 | *c = SkUnPreMultiply::PMColorToColor( |
| 55 | (*ctable)[*bitmap.getAddr8(x, y)]); |
| 56 | break; |
| 57 | } |
| 58 | default: |
| 59 | return false; |
| 60 | } |
| 61 | return true; |
| 62 | } |
| 63 | |
| 64 | static SkColor modAlpha(SkColor c, int alpha) { |
| 65 | int scale = alpha + (alpha >> 7); |
| 66 | int a = SkColorGetA(c) * scale >> 8; |
| 67 | return SkColorSetA(c, a); |
| 68 | } |
| 69 | |
| 70 | static void drawStretchyPatch(SkCanvas* canvas, SkIRect& src, const SkRect& dst, |
| 71 | const SkBitmap& bitmap, const SkPaint& paint, |
| 72 | SkColor initColor, uint32_t colorHint, |
| 73 | bool hasXfer) { |
| 74 | if (colorHint != android::Res_png_9patch::NO_COLOR) { |
| 75 | ((SkPaint*)&paint)->setColor(modAlpha(colorHint, paint.getAlpha())); |
| 76 | canvas->drawRect(dst, paint); |
| 77 | ((SkPaint*)&paint)->setColor(initColor); |
| 78 | } else if (src.width() == 1 && src.height() == 1) { |
| 79 | SkColor c; |
| 80 | if (!getColor(bitmap, src.fLeft, src.fTop, &c)) { |
| 81 | goto SLOW_CASE; |
| 82 | } |
| 83 | if (0 != c || hasXfer) { |
| 84 | SkColor prev = paint.getColor(); |
| 85 | ((SkPaint*)&paint)->setColor(c); |
| 86 | canvas->drawRect(dst, paint); |
| 87 | ((SkPaint*)&paint)->setColor(prev); |
| 88 | } |
| 89 | } else { |
| 90 | SLOW_CASE: |
| 91 | canvas->drawBitmapRect(bitmap, &src, dst, &paint); |
| 92 | } |
| 93 | } |
| 94 | |
| 95 | SkScalar calculateStretch(SkScalar boundsLimit, SkScalar startingPoint, |
| 96 | int srcSpace, int numStrechyPixelsRemaining, |
| 97 | int numFixedPixelsRemaining) { |
| 98 | SkScalar spaceRemaining = boundsLimit - startingPoint; |
| 99 | SkScalar stretchySpaceRemaining = |
| 100 | spaceRemaining - SkIntToScalar(numFixedPixelsRemaining); |
| 101 | return SkScalarMulDiv(srcSpace, stretchySpaceRemaining, |
| 102 | numStrechyPixelsRemaining); |
| 103 | } |
| 104 | |
| 105 | void NinePatch_Draw(SkCanvas* canvas, const SkRect& bounds, |
| 106 | const SkBitmap& bitmap, const android::Res_png_9patch& chunk, |
| 107 | const SkPaint* paint, SkRegion** outRegion) { |
Derek Sollenberger | ca79cf6 | 2012-08-14 16:44:52 -0400 | [diff] [blame] | 108 | if (canvas && canvas->quickReject(bounds)) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 109 | return; |
| 110 | } |
Mike Reed | 211db4a | 2009-09-11 09:36:35 -0400 | [diff] [blame] | 111 | |
| 112 | SkPaint defaultPaint; |
| 113 | if (NULL == paint) { |
| 114 | // matches default dither in NinePatchDrawable.java. |
| 115 | defaultPaint.setDither(true); |
| 116 | paint = &defaultPaint; |
| 117 | } |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 118 | |
Derek Sollenberger | d39d1af | 2011-05-16 13:09:42 -0400 | [diff] [blame] | 119 | // if our SkCanvas were back by GL we should enable this and draw this as |
| 120 | // a mesh, which will be faster in most cases. |
| 121 | if (false) { |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 122 | SkNinePatch::DrawMesh(canvas, bounds, bitmap, |
| 123 | chunk.xDivs, chunk.numXDivs, |
| 124 | chunk.yDivs, chunk.numYDivs, |
| 125 | paint); |
| 126 | return; |
| 127 | } |
| 128 | |
| 129 | #ifdef USE_TRACE |
| 130 | gTrace = true; |
| 131 | #endif |
| 132 | |
| 133 | SkASSERT(canvas || outRegion); |
| 134 | |
Dianne Hackborn | 8cae124 | 2009-09-10 14:32:16 -0700 | [diff] [blame] | 135 | #ifdef USE_TRACE |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 136 | if (canvas) { |
| 137 | const SkMatrix& m = canvas->getTotalMatrix(); |
Steve Block | 71f2cf1 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 138 | ALOGV("ninepatch [%g %g %g] [%g %g %g]\n", |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 139 | SkScalarToFloat(m[0]), SkScalarToFloat(m[1]), SkScalarToFloat(m[2]), |
| 140 | SkScalarToFloat(m[3]), SkScalarToFloat(m[4]), SkScalarToFloat(m[5])); |
| 141 | } |
| 142 | #endif |
| 143 | |
| 144 | #ifdef USE_TRACE |
| 145 | if (gTrace) { |
Steve Block | 71f2cf1 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 146 | ALOGV("======== ninepatch bounds [%g %g]\n", SkScalarToFloat(bounds.width()), SkScalarToFloat(bounds.height())); |
| 147 | ALOGV("======== ninepatch paint bm [%d,%d]\n", bitmap.width(), bitmap.height()); |
| 148 | ALOGV("======== ninepatch xDivs [%d,%d]\n", chunk.xDivs[0], chunk.xDivs[1]); |
| 149 | ALOGV("======== ninepatch yDivs [%d,%d]\n", chunk.yDivs[0], chunk.yDivs[1]); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 150 | } |
| 151 | #endif |
| 152 | |
| 153 | if (bounds.isEmpty() || |
| 154 | bitmap.width() == 0 || bitmap.height() == 0 || |
| 155 | (paint && paint->getXfermode() == NULL && paint->getAlpha() == 0)) |
| 156 | { |
| 157 | #ifdef USE_TRACE |
Steve Block | 71f2cf1 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 158 | if (gTrace) ALOGV("======== abort ninepatch draw\n"); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 159 | #endif |
| 160 | return; |
| 161 | } |
| 162 | |
| 163 | // should try a quick-reject test before calling lockPixels |
| 164 | |
| 165 | SkAutoLockPixels alp(bitmap); |
| 166 | // after the lock, it is valid to check getPixels() |
| 167 | if (bitmap.getPixels() == NULL) |
| 168 | return; |
| 169 | |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 170 | const bool hasXfer = paint->getXfermode() != NULL; |
| 171 | SkRect dst; |
| 172 | SkIRect src; |
| 173 | |
| 174 | const int32_t x0 = chunk.xDivs[0]; |
| 175 | const int32_t y0 = chunk.yDivs[0]; |
| 176 | const SkColor initColor = ((SkPaint*)paint)->getColor(); |
| 177 | const uint8_t numXDivs = chunk.numXDivs; |
| 178 | const uint8_t numYDivs = chunk.numYDivs; |
| 179 | int i; |
| 180 | int j; |
| 181 | int colorIndex = 0; |
| 182 | uint32_t color; |
| 183 | bool xIsStretchable; |
| 184 | const bool initialXIsStretchable = (x0 == 0); |
| 185 | bool yIsStretchable = (y0 == 0); |
| 186 | const int bitmapWidth = bitmap.width(); |
| 187 | const int bitmapHeight = bitmap.height(); |
| 188 | |
| 189 | SkScalar* dstRights = (SkScalar*) alloca((numXDivs + 1) * sizeof(SkScalar)); |
| 190 | bool dstRightsHaveBeenCached = false; |
| 191 | |
| 192 | int numStretchyXPixelsRemaining = 0; |
| 193 | for (i = 0; i < numXDivs; i += 2) { |
| 194 | numStretchyXPixelsRemaining += chunk.xDivs[i + 1] - chunk.xDivs[i]; |
| 195 | } |
| 196 | int numFixedXPixelsRemaining = bitmapWidth - numStretchyXPixelsRemaining; |
| 197 | int numStretchyYPixelsRemaining = 0; |
| 198 | for (i = 0; i < numYDivs; i += 2) { |
| 199 | numStretchyYPixelsRemaining += chunk.yDivs[i + 1] - chunk.yDivs[i]; |
| 200 | } |
| 201 | int numFixedYPixelsRemaining = bitmapHeight - numStretchyYPixelsRemaining; |
| 202 | |
Dianne Hackborn | 8cae124 | 2009-09-10 14:32:16 -0700 | [diff] [blame] | 203 | #ifdef USE_TRACE |
Steve Block | 71f2cf1 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 204 | ALOGV("NinePatch [%d %d] bounds [%g %g %g %g] divs [%d %d]\n", |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 205 | bitmap.width(), bitmap.height(), |
| 206 | SkScalarToFloat(bounds.fLeft), SkScalarToFloat(bounds.fTop), |
| 207 | SkScalarToFloat(bounds.width()), SkScalarToFloat(bounds.height()), |
| 208 | numXDivs, numYDivs); |
| 209 | #endif |
| 210 | |
| 211 | src.fTop = 0; |
| 212 | dst.fTop = bounds.fTop; |
| 213 | // The first row always starts with the top being at y=0 and the bottom |
| 214 | // being either yDivs[1] (if yDivs[0]=0) of yDivs[0]. In the former case |
| 215 | // the first row is stretchable along the Y axis, otherwise it is fixed. |
| 216 | // The last row always ends with the bottom being bitmap.height and the top |
| 217 | // being either yDivs[numYDivs-2] (if yDivs[numYDivs-1]=bitmap.height) or |
| 218 | // yDivs[numYDivs-1]. In the former case the last row is stretchable along |
| 219 | // the Y axis, otherwise it is fixed. |
| 220 | // |
| 221 | // The first and last columns are similarly treated with respect to the X |
| 222 | // axis. |
| 223 | // |
| 224 | // The above is to help explain some of the special casing that goes on the |
| 225 | // code below. |
| 226 | |
| 227 | // The initial yDiv and whether the first row is considered stretchable or |
| 228 | // not depends on whether yDiv[0] was zero or not. |
| 229 | for (j = yIsStretchable ? 1 : 0; |
| 230 | j <= numYDivs && src.fTop < bitmapHeight; |
| 231 | j++, yIsStretchable = !yIsStretchable) { |
| 232 | src.fLeft = 0; |
| 233 | dst.fLeft = bounds.fLeft; |
| 234 | if (j == numYDivs) { |
| 235 | src.fBottom = bitmapHeight; |
| 236 | dst.fBottom = bounds.fBottom; |
| 237 | } else { |
| 238 | src.fBottom = chunk.yDivs[j]; |
| 239 | const int srcYSize = src.fBottom - src.fTop; |
| 240 | if (yIsStretchable) { |
| 241 | dst.fBottom = dst.fTop + calculateStretch(bounds.fBottom, dst.fTop, |
| 242 | srcYSize, |
| 243 | numStretchyYPixelsRemaining, |
| 244 | numFixedYPixelsRemaining); |
| 245 | numStretchyYPixelsRemaining -= srcYSize; |
| 246 | } else { |
| 247 | dst.fBottom = dst.fTop + SkIntToScalar(srcYSize); |
| 248 | numFixedYPixelsRemaining -= srcYSize; |
| 249 | } |
| 250 | } |
| 251 | |
| 252 | xIsStretchable = initialXIsStretchable; |
| 253 | // The initial xDiv and whether the first column is considered |
| 254 | // stretchable or not depends on whether xDiv[0] was zero or not. |
| 255 | for (i = xIsStretchable ? 1 : 0; |
| 256 | i <= numXDivs && src.fLeft < bitmapWidth; |
| 257 | i++, xIsStretchable = !xIsStretchable) { |
| 258 | color = chunk.colors[colorIndex++]; |
| 259 | if (i == numXDivs) { |
| 260 | src.fRight = bitmapWidth; |
| 261 | dst.fRight = bounds.fRight; |
| 262 | } else { |
| 263 | src.fRight = chunk.xDivs[i]; |
| 264 | if (dstRightsHaveBeenCached) { |
| 265 | dst.fRight = dstRights[i]; |
| 266 | } else { |
| 267 | const int srcXSize = src.fRight - src.fLeft; |
| 268 | if (xIsStretchable) { |
| 269 | dst.fRight = dst.fLeft + calculateStretch(bounds.fRight, dst.fLeft, |
| 270 | srcXSize, |
| 271 | numStretchyXPixelsRemaining, |
| 272 | numFixedXPixelsRemaining); |
| 273 | numStretchyXPixelsRemaining -= srcXSize; |
| 274 | } else { |
| 275 | dst.fRight = dst.fLeft + SkIntToScalar(srcXSize); |
| 276 | numFixedXPixelsRemaining -= srcXSize; |
| 277 | } |
| 278 | dstRights[i] = dst.fRight; |
| 279 | } |
| 280 | } |
| 281 | // If this horizontal patch is too small to be displayed, leave |
| 282 | // the destination left edge where it is and go on to the next patch |
| 283 | // in the source. |
| 284 | if (src.fLeft >= src.fRight) { |
| 285 | src.fLeft = src.fRight; |
| 286 | continue; |
| 287 | } |
| 288 | // Make sure that we actually have room to draw any bits |
| 289 | if (dst.fRight <= dst.fLeft || dst.fBottom <= dst.fTop) { |
| 290 | goto nextDiv; |
| 291 | } |
| 292 | // If this patch is transparent, skip and don't draw. |
| 293 | if (color == android::Res_png_9patch::TRANSPARENT_COLOR && !hasXfer) { |
| 294 | if (outRegion) { |
| 295 | if (*outRegion == NULL) { |
| 296 | *outRegion = new SkRegion(); |
| 297 | } |
| 298 | SkIRect idst; |
| 299 | dst.round(&idst); |
Steve Block | 6215d3f | 2012-01-04 20:05:49 +0000 | [diff] [blame] | 300 | //ALOGI("Adding trans rect: (%d,%d)-(%d,%d)\n", |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 301 | // idst.fLeft, idst.fTop, idst.fRight, idst.fBottom); |
| 302 | (*outRegion)->op(idst, SkRegion::kUnion_Op); |
| 303 | } |
| 304 | goto nextDiv; |
| 305 | } |
| 306 | if (canvas) { |
Dianne Hackborn | 8cae124 | 2009-09-10 14:32:16 -0700 | [diff] [blame] | 307 | #ifdef USE_TRACE |
Steve Block | 71f2cf1 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 308 | ALOGV("-- src [%d %d %d %d] dst [%g %g %g %g]\n", |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 309 | src.fLeft, src.fTop, src.width(), src.height(), |
| 310 | SkScalarToFloat(dst.fLeft), SkScalarToFloat(dst.fTop), |
| 311 | SkScalarToFloat(dst.width()), SkScalarToFloat(dst.height())); |
| 312 | if (2 == src.width() && SkIntToScalar(5) == dst.width()) { |
Steve Block | 71f2cf1 | 2011-10-20 11:56:00 +0100 | [diff] [blame] | 313 | ALOGV("--- skip patch\n"); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 314 | } |
| 315 | #endif |
| 316 | drawStretchyPatch(canvas, src, dst, bitmap, *paint, initColor, |
| 317 | color, hasXfer); |
| 318 | } |
| 319 | |
| 320 | nextDiv: |
| 321 | src.fLeft = src.fRight; |
| 322 | dst.fLeft = dst.fRight; |
| 323 | } |
| 324 | src.fTop = src.fBottom; |
| 325 | dst.fTop = dst.fBottom; |
| 326 | dstRightsHaveBeenCached = true; |
| 327 | } |
| 328 | } |