jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2013 Google Inc. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license that can be |
| 5 | * found in the LICENSE file. |
| 6 | */ |
| 7 | |
| 8 | #include "GrBitmapTextContext.h" |
| 9 | #include "GrAtlas.h" |
| 10 | #include "GrDrawTarget.h" |
| 11 | #include "GrFontScaler.h" |
| 12 | #include "GrIndexBuffer.h" |
| 13 | #include "GrTextStrike.h" |
| 14 | #include "GrTextStrike_impl.h" |
commit-bot@chromium.org | 42a8957 | 2013-10-28 15:13:50 +0000 | [diff] [blame] | 15 | #include "SkColorPriv.h" |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 16 | #include "SkPath.h" |
| 17 | #include "SkRTConf.h" |
| 18 | #include "SkStrokeRec.h" |
| 19 | #include "effects/GrCustomCoordsTextureEffect.h" |
| 20 | |
commit-bot@chromium.org | e8612d9 | 2014-01-28 22:02:07 +0000 | [diff] [blame] | 21 | #include "SkAutoKern.h" |
commit-bot@chromium.org | 9f94b91 | 2014-01-30 15:22:54 +0000 | [diff] [blame] | 22 | #include "SkDraw.h" |
commit-bot@chromium.org | e8612d9 | 2014-01-28 22:02:07 +0000 | [diff] [blame] | 23 | #include "SkGlyphCache.h" |
| 24 | #include "SkGpuDevice.h" |
| 25 | #include "SkGr.h" |
| 26 | |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 27 | static const int kGlyphCoordsAttributeIndex = 1; |
| 28 | |
| 29 | SK_CONF_DECLARE(bool, c_DumpFontCache, "gpu.dumpFontCache", false, |
| 30 | "Dump the contents of the font cache before every purge."); |
| 31 | |
skia.committer@gmail.com | e5d7015 | 2014-01-29 07:01:48 +0000 | [diff] [blame] | 32 | GrBitmapTextContext::GrBitmapTextContext(GrContext* context, |
commit-bot@chromium.org | e8612d9 | 2014-01-28 22:02:07 +0000 | [diff] [blame] | 33 | const SkDeviceProperties& properties) |
commit-bot@chromium.org | cbbc481 | 2014-01-30 22:05:47 +0000 | [diff] [blame] | 34 | : GrTextContext(context, properties) { |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 35 | fStrike = NULL; |
| 36 | |
| 37 | fCurrTexture = NULL; |
| 38 | fCurrVertex = 0; |
| 39 | |
| 40 | fVertices = NULL; |
| 41 | fMaxVertices = 0; |
commit-bot@chromium.org | 3ae0e6c | 2014-02-11 18:24:25 +0000 | [diff] [blame] | 42 | |
| 43 | fVertexBounds.setLargestInverted(); |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 44 | } |
| 45 | |
| 46 | GrBitmapTextContext::~GrBitmapTextContext() { |
| 47 | this->flushGlyphs(); |
| 48 | } |
| 49 | |
commit-bot@chromium.org | cbbc481 | 2014-01-30 22:05:47 +0000 | [diff] [blame] | 50 | bool GrBitmapTextContext::canDraw(const SkPaint& paint) { |
| 51 | return !SkDraw::ShouldDrawTextAsPaths(paint, fContext->getMatrix()); |
| 52 | } |
| 53 | |
commit-bot@chromium.org | 42a8957 | 2013-10-28 15:13:50 +0000 | [diff] [blame] | 54 | static inline GrColor skcolor_to_grcolor_nopremultiply(SkColor c) { |
| 55 | unsigned r = SkColorGetR(c); |
| 56 | unsigned g = SkColorGetG(c); |
| 57 | unsigned b = SkColorGetB(c); |
| 58 | return GrColorPackRGBA(r, g, b, 0xff); |
| 59 | } |
| 60 | |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 61 | void GrBitmapTextContext::flushGlyphs() { |
| 62 | if (NULL == fDrawTarget) { |
| 63 | return; |
| 64 | } |
| 65 | |
| 66 | GrDrawState* drawState = fDrawTarget->drawState(); |
| 67 | GrDrawState::AutoRestoreEffects are(drawState); |
| 68 | drawState->setFromPaint(fPaint, SkMatrix::I(), fContext->getRenderTarget()); |
| 69 | |
| 70 | if (fCurrVertex > 0) { |
| 71 | // setup our sampler state for our text texture/atlas |
| 72 | SkASSERT(GrIsALIGN4(fCurrVertex)); |
| 73 | SkASSERT(fCurrTexture); |
| 74 | GrTextureParams params(SkShader::kRepeat_TileMode, GrTextureParams::kNone_FilterMode); |
| 75 | |
| 76 | // This effect could be stored with one of the cache objects (atlas?) |
| 77 | drawState->addCoverageEffect( |
| 78 | GrCustomCoordsTextureEffect::Create(fCurrTexture, params), |
| 79 | kGlyphCoordsAttributeIndex)->unref(); |
| 80 | |
commit-bot@chromium.org | f8cb184 | 2013-12-03 19:45:22 +0000 | [diff] [blame] | 81 | if (NULL != fStrike && kARGB_GrMaskFormat == fStrike->getMaskFormat()) { |
| 82 | drawState->setBlendFunc(fPaint.getSrcBlendCoeff(), fPaint.getDstBlendCoeff()); |
| 83 | drawState->setColor(0xffffffff); |
| 84 | } else if (!GrPixelConfigIsAlphaOnly(fCurrTexture->config())) { |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 85 | if (kOne_GrBlendCoeff != fPaint.getSrcBlendCoeff() || |
| 86 | kISA_GrBlendCoeff != fPaint.getDstBlendCoeff() || |
| 87 | fPaint.numColorStages()) { |
| 88 | GrPrintf("LCD Text will not draw correctly.\n"); |
| 89 | } |
commit-bot@chromium.org | 42a8957 | 2013-10-28 15:13:50 +0000 | [diff] [blame] | 90 | // We don't use the GrPaint's color in this case because it's been premultiplied by |
| 91 | // alpha. Instead we feed in a non-premultiplied color, and multiply its alpha by |
skia.committer@gmail.com | 70402c3 | 2013-10-29 07:01:50 +0000 | [diff] [blame] | 92 | // the mask texture color. The end result is that we get |
commit-bot@chromium.org | 42a8957 | 2013-10-28 15:13:50 +0000 | [diff] [blame] | 93 | // mask*paintAlpha*paintColor + (1-mask*paintAlpha)*dstColor |
commit-bot@chromium.org | cc40f06 | 2014-01-24 14:38:27 +0000 | [diff] [blame] | 94 | int a = SkColorGetA(fSkPaint.getColor()); |
commit-bot@chromium.org | 42a8957 | 2013-10-28 15:13:50 +0000 | [diff] [blame] | 95 | // paintAlpha |
| 96 | drawState->setColor(SkColorSetARGB(a, a, a, a)); |
| 97 | // paintColor |
commit-bot@chromium.org | cc40f06 | 2014-01-24 14:38:27 +0000 | [diff] [blame] | 98 | drawState->setBlendConstant(skcolor_to_grcolor_nopremultiply(fSkPaint.getColor())); |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 99 | drawState->setBlendFunc(kConstC_GrBlendCoeff, kISC_GrBlendCoeff); |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 100 | } else { |
| 101 | // set back to normal in case we took LCD path previously. |
| 102 | drawState->setBlendFunc(fPaint.getSrcBlendCoeff(), fPaint.getDstBlendCoeff()); |
| 103 | drawState->setColor(fPaint.getColor()); |
| 104 | } |
| 105 | |
| 106 | int nGlyphs = fCurrVertex / 4; |
| 107 | fDrawTarget->setIndexSourceToBuffer(fContext->getQuadIndexBuffer()); |
| 108 | fDrawTarget->drawIndexedInstances(kTriangles_GrPrimitiveType, |
| 109 | nGlyphs, |
commit-bot@chromium.org | 3ae0e6c | 2014-02-11 18:24:25 +0000 | [diff] [blame] | 110 | 4, 6, &fVertexBounds); |
commit-bot@chromium.org | 42a8957 | 2013-10-28 15:13:50 +0000 | [diff] [blame] | 111 | |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 112 | fDrawTarget->resetVertexSource(); |
| 113 | fVertices = NULL; |
| 114 | fMaxVertices = 0; |
| 115 | fCurrVertex = 0; |
commit-bot@chromium.org | 3ae0e6c | 2014-02-11 18:24:25 +0000 | [diff] [blame] | 116 | fVertexBounds.setLargestInverted(); |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 117 | SkSafeSetNull(fCurrTexture); |
| 118 | } |
| 119 | } |
| 120 | |
commit-bot@chromium.org | cbbc481 | 2014-01-30 22:05:47 +0000 | [diff] [blame] | 121 | inline void GrBitmapTextContext::init(const GrPaint& paint, const SkPaint& skPaint) { |
| 122 | GrTextContext::init(paint, skPaint); |
| 123 | |
| 124 | fStrike = NULL; |
| 125 | |
| 126 | fCurrTexture = NULL; |
| 127 | fCurrVertex = 0; |
| 128 | |
| 129 | fVertices = NULL; |
| 130 | fMaxVertices = 0; |
| 131 | } |
| 132 | |
| 133 | inline void GrBitmapTextContext::finish() { |
| 134 | flushGlyphs(); |
| 135 | |
| 136 | GrTextContext::finish(); |
| 137 | } |
| 138 | |
skia.committer@gmail.com | 4c18e9f | 2014-01-31 03:01:59 +0000 | [diff] [blame] | 139 | void GrBitmapTextContext::drawText(const GrPaint& paint, const SkPaint& skPaint, |
commit-bot@chromium.org | cbbc481 | 2014-01-30 22:05:47 +0000 | [diff] [blame] | 140 | const char text[], size_t byteLength, |
commit-bot@chromium.org | e8612d9 | 2014-01-28 22:02:07 +0000 | [diff] [blame] | 141 | SkScalar x, SkScalar y) { |
| 142 | SkASSERT(byteLength == 0 || text != NULL); |
| 143 | |
| 144 | // nothing to draw |
| 145 | if (text == NULL || byteLength == 0 /*|| fRC->isEmpty()*/) { |
| 146 | return; |
| 147 | } |
| 148 | |
commit-bot@chromium.org | cbbc481 | 2014-01-30 22:05:47 +0000 | [diff] [blame] | 149 | this->init(paint, skPaint); |
| 150 | |
commit-bot@chromium.org | e8612d9 | 2014-01-28 22:02:07 +0000 | [diff] [blame] | 151 | SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc(); |
| 152 | |
| 153 | SkAutoGlyphCache autoCache(fSkPaint, &fDeviceProperties, &fContext->getMatrix()); |
| 154 | SkGlyphCache* cache = autoCache.getCache(); |
| 155 | GrFontScaler* fontScaler = GetGrFontScaler(cache); |
| 156 | |
| 157 | // transform our starting point |
| 158 | { |
| 159 | SkPoint loc; |
| 160 | fContext->getMatrix().mapXY(x, y, &loc); |
| 161 | x = loc.fX; |
| 162 | y = loc.fY; |
| 163 | } |
| 164 | |
| 165 | // need to measure first |
| 166 | if (fSkPaint.getTextAlign() != SkPaint::kLeft_Align) { |
| 167 | SkVector stop; |
| 168 | |
| 169 | MeasureText(cache, glyphCacheProc, text, byteLength, &stop); |
| 170 | |
| 171 | SkScalar stopX = stop.fX; |
| 172 | SkScalar stopY = stop.fY; |
| 173 | |
| 174 | if (fSkPaint.getTextAlign() == SkPaint::kCenter_Align) { |
| 175 | stopX = SkScalarHalf(stopX); |
| 176 | stopY = SkScalarHalf(stopY); |
| 177 | } |
| 178 | x -= stopX; |
| 179 | y -= stopY; |
| 180 | } |
| 181 | |
| 182 | const char* stop = text + byteLength; |
| 183 | |
| 184 | SkAutoKern autokern; |
| 185 | |
| 186 | SkFixed fxMask = ~0; |
| 187 | SkFixed fyMask = ~0; |
| 188 | SkFixed halfSampleX, halfSampleY; |
| 189 | if (cache->isSubpixel()) { |
| 190 | halfSampleX = halfSampleY = (SK_FixedHalf >> SkGlyph::kSubBits); |
| 191 | SkAxisAlignment baseline = SkComputeAxisAlignmentForHText(fContext->getMatrix()); |
| 192 | if (kX_SkAxisAlignment == baseline) { |
| 193 | fyMask = 0; |
| 194 | halfSampleY = SK_FixedHalf; |
| 195 | } else if (kY_SkAxisAlignment == baseline) { |
| 196 | fxMask = 0; |
| 197 | halfSampleX = SK_FixedHalf; |
| 198 | } |
| 199 | } else { |
| 200 | halfSampleX = halfSampleY = SK_FixedHalf; |
| 201 | } |
| 202 | |
| 203 | SkFixed fx = SkScalarToFixed(x) + halfSampleX; |
| 204 | SkFixed fy = SkScalarToFixed(y) + halfSampleY; |
skia.committer@gmail.com | e5d7015 | 2014-01-29 07:01:48 +0000 | [diff] [blame] | 205 | |
commit-bot@chromium.org | e8612d9 | 2014-01-28 22:02:07 +0000 | [diff] [blame] | 206 | GrContext::AutoMatrix autoMatrix; |
| 207 | autoMatrix.setIdentity(fContext, &fPaint); |
skia.committer@gmail.com | e5d7015 | 2014-01-29 07:01:48 +0000 | [diff] [blame] | 208 | |
commit-bot@chromium.org | e8612d9 | 2014-01-28 22:02:07 +0000 | [diff] [blame] | 209 | while (text < stop) { |
| 210 | const SkGlyph& glyph = glyphCacheProc(cache, &text, fx & fxMask, fy & fyMask); |
| 211 | |
| 212 | fx += autokern.adjust(glyph); |
| 213 | |
| 214 | if (glyph.fWidth) { |
| 215 | this->drawPackedGlyph(GrGlyph::Pack(glyph.getGlyphID(), |
| 216 | glyph.getSubXFixed(), |
| 217 | glyph.getSubYFixed()), |
| 218 | SkFixedFloorToFixed(fx), |
| 219 | SkFixedFloorToFixed(fy), |
| 220 | fontScaler); |
| 221 | } |
| 222 | |
| 223 | fx += glyph.fAdvanceX; |
| 224 | fy += glyph.fAdvanceY; |
| 225 | } |
commit-bot@chromium.org | cbbc481 | 2014-01-30 22:05:47 +0000 | [diff] [blame] | 226 | |
| 227 | this->finish(); |
commit-bot@chromium.org | e8612d9 | 2014-01-28 22:02:07 +0000 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | /////////////////////////////////////////////////////////////////////////////// |
| 231 | // Copied from SkDraw |
| 232 | |
| 233 | // last parameter is interpreted as SkFixed [x, y] |
| 234 | // return the fixed position, which may be rounded or not by the caller |
| 235 | // e.g. subpixel doesn't round |
| 236 | typedef void (*AlignProc)(const SkPoint&, const SkGlyph&, SkIPoint*); |
| 237 | |
| 238 | static void leftAlignProc(const SkPoint& loc, const SkGlyph& glyph, SkIPoint* dst) { |
| 239 | dst->set(SkScalarToFixed(loc.fX), SkScalarToFixed(loc.fY)); |
| 240 | } |
| 241 | |
| 242 | static void centerAlignProc(const SkPoint& loc, const SkGlyph& glyph, SkIPoint* dst) { |
| 243 | dst->set(SkScalarToFixed(loc.fX) - (glyph.fAdvanceX >> 1), |
| 244 | SkScalarToFixed(loc.fY) - (glyph.fAdvanceY >> 1)); |
| 245 | } |
| 246 | |
| 247 | static void rightAlignProc(const SkPoint& loc, const SkGlyph& glyph, SkIPoint* dst) { |
| 248 | dst->set(SkScalarToFixed(loc.fX) - glyph.fAdvanceX, |
| 249 | SkScalarToFixed(loc.fY) - glyph.fAdvanceY); |
| 250 | } |
| 251 | |
| 252 | static AlignProc pick_align_proc(SkPaint::Align align) { |
| 253 | static const AlignProc gProcs[] = { |
| 254 | leftAlignProc, centerAlignProc, rightAlignProc |
| 255 | }; |
| 256 | |
| 257 | SkASSERT((unsigned)align < SK_ARRAY_COUNT(gProcs)); |
| 258 | |
| 259 | return gProcs[align]; |
| 260 | } |
| 261 | |
| 262 | class BitmapTextMapState { |
| 263 | public: |
| 264 | mutable SkPoint fLoc; |
| 265 | |
| 266 | BitmapTextMapState(const SkMatrix& matrix, SkScalar y) |
| 267 | : fMatrix(matrix), fProc(matrix.getMapXYProc()), fY(y) {} |
| 268 | |
| 269 | typedef void (*Proc)(const BitmapTextMapState&, const SkScalar pos[]); |
| 270 | |
| 271 | Proc pickProc(int scalarsPerPosition); |
| 272 | |
| 273 | private: |
| 274 | const SkMatrix& fMatrix; |
| 275 | SkMatrix::MapXYProc fProc; |
| 276 | SkScalar fY; // ignored by MapXYProc |
| 277 | // these are only used by Only... procs |
| 278 | SkScalar fScaleX, fTransX, fTransformedY; |
| 279 | |
| 280 | static void MapXProc(const BitmapTextMapState& state, const SkScalar pos[]) { |
| 281 | state.fProc(state.fMatrix, *pos, state.fY, &state.fLoc); |
| 282 | } |
| 283 | |
| 284 | static void MapXYProc(const BitmapTextMapState& state, const SkScalar pos[]) { |
| 285 | state.fProc(state.fMatrix, pos[0], pos[1], &state.fLoc); |
| 286 | } |
| 287 | |
| 288 | static void MapOnlyScaleXProc(const BitmapTextMapState& state, |
| 289 | const SkScalar pos[]) { |
| 290 | state.fLoc.set(SkScalarMul(state.fScaleX, *pos) + state.fTransX, |
| 291 | state.fTransformedY); |
| 292 | } |
| 293 | |
| 294 | static void MapOnlyTransXProc(const BitmapTextMapState& state, |
| 295 | const SkScalar pos[]) { |
| 296 | state.fLoc.set(*pos + state.fTransX, state.fTransformedY); |
| 297 | } |
| 298 | }; |
| 299 | |
| 300 | BitmapTextMapState::Proc BitmapTextMapState::pickProc(int scalarsPerPosition) { |
| 301 | SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition); |
| 302 | |
| 303 | if (1 == scalarsPerPosition) { |
| 304 | unsigned mtype = fMatrix.getType(); |
| 305 | if (mtype & (SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask)) { |
| 306 | return MapXProc; |
| 307 | } else { |
| 308 | fScaleX = fMatrix.getScaleX(); |
| 309 | fTransX = fMatrix.getTranslateX(); |
| 310 | fTransformedY = SkScalarMul(fY, fMatrix.getScaleY()) + |
| 311 | fMatrix.getTranslateY(); |
| 312 | return (mtype & SkMatrix::kScale_Mask) ? |
| 313 | MapOnlyScaleXProc : MapOnlyTransXProc; |
| 314 | } |
| 315 | } else { |
| 316 | return MapXYProc; |
| 317 | } |
| 318 | } |
| 319 | |
| 320 | /////////////////////////////////////////////////////////////////////////////// |
| 321 | |
skia.committer@gmail.com | 4c18e9f | 2014-01-31 03:01:59 +0000 | [diff] [blame] | 322 | void GrBitmapTextContext::drawPosText(const GrPaint& paint, const SkPaint& skPaint, |
commit-bot@chromium.org | cbbc481 | 2014-01-30 22:05:47 +0000 | [diff] [blame] | 323 | const char text[], size_t byteLength, |
commit-bot@chromium.org | e8612d9 | 2014-01-28 22:02:07 +0000 | [diff] [blame] | 324 | const SkScalar pos[], SkScalar constY, |
| 325 | int scalarsPerPosition) { |
| 326 | SkASSERT(byteLength == 0 || text != NULL); |
| 327 | SkASSERT(1 == scalarsPerPosition || 2 == scalarsPerPosition); |
| 328 | |
| 329 | // nothing to draw |
| 330 | if (text == NULL || byteLength == 0/* || fRC->isEmpty()*/) { |
| 331 | return; |
| 332 | } |
| 333 | |
commit-bot@chromium.org | cbbc481 | 2014-01-30 22:05:47 +0000 | [diff] [blame] | 334 | this->init(paint, skPaint); |
| 335 | |
commit-bot@chromium.org | e8612d9 | 2014-01-28 22:02:07 +0000 | [diff] [blame] | 336 | SkDrawCacheProc glyphCacheProc = fSkPaint.getDrawCacheProc(); |
| 337 | |
| 338 | SkAutoGlyphCache autoCache(fSkPaint, &fDeviceProperties, &fContext->getMatrix()); |
| 339 | SkGlyphCache* cache = autoCache.getCache(); |
| 340 | GrFontScaler* fontScaler = GetGrFontScaler(cache); |
| 341 | |
| 342 | // store original matrix before we reset, so we can use it to transform positions |
| 343 | SkMatrix ctm = fContext->getMatrix(); |
| 344 | GrContext::AutoMatrix autoMatrix; |
| 345 | autoMatrix.setIdentity(fContext, &fPaint); |
| 346 | |
| 347 | const char* stop = text + byteLength; |
| 348 | AlignProc alignProc = pick_align_proc(fSkPaint.getTextAlign()); |
| 349 | BitmapTextMapState tms(ctm, constY); |
| 350 | BitmapTextMapState::Proc tmsProc = tms.pickProc(scalarsPerPosition); |
| 351 | SkFixed halfSampleX = 0, halfSampleY = 0; |
| 352 | |
| 353 | if (cache->isSubpixel()) { |
| 354 | // maybe we should skip the rounding if linearText is set |
| 355 | SkAxisAlignment baseline = SkComputeAxisAlignmentForHText(ctm); |
| 356 | |
| 357 | SkFixed fxMask = ~0; |
| 358 | SkFixed fyMask = ~0; |
| 359 | if (kX_SkAxisAlignment == baseline) { |
| 360 | fyMask = 0; |
| 361 | #ifndef SK_IGNORE_SUBPIXEL_AXIS_ALIGN_FIX |
| 362 | halfSampleY = SK_FixedHalf; |
| 363 | #endif |
| 364 | } else if (kY_SkAxisAlignment == baseline) { |
| 365 | fxMask = 0; |
| 366 | #ifndef SK_IGNORE_SUBPIXEL_AXIS_ALIGN_FIX |
| 367 | halfSampleX = SK_FixedHalf; |
| 368 | #endif |
| 369 | } |
| 370 | |
| 371 | if (SkPaint::kLeft_Align == fSkPaint.getTextAlign()) { |
| 372 | while (text < stop) { |
| 373 | tmsProc(tms, pos); |
| 374 | SkFixed fx = SkScalarToFixed(tms.fLoc.fX) + halfSampleX; |
| 375 | SkFixed fy = SkScalarToFixed(tms.fLoc.fY) + halfSampleY; |
| 376 | |
| 377 | const SkGlyph& glyph = glyphCacheProc(cache, &text, |
| 378 | fx & fxMask, fy & fyMask); |
| 379 | |
| 380 | if (glyph.fWidth) { |
| 381 | this->drawPackedGlyph(GrGlyph::Pack(glyph.getGlyphID(), |
| 382 | glyph.getSubXFixed(), |
| 383 | glyph.getSubYFixed()), |
| 384 | SkFixedFloorToFixed(fx), |
| 385 | SkFixedFloorToFixed(fy), |
| 386 | fontScaler); |
| 387 | } |
| 388 | pos += scalarsPerPosition; |
| 389 | } |
| 390 | } else { |
| 391 | while (text < stop) { |
| 392 | const char* currentText = text; |
| 393 | const SkGlyph& metricGlyph = glyphCacheProc(cache, &text, 0, 0); |
| 394 | |
| 395 | if (metricGlyph.fWidth) { |
| 396 | SkDEBUGCODE(SkFixed prevAdvX = metricGlyph.fAdvanceX;) |
| 397 | SkDEBUGCODE(SkFixed prevAdvY = metricGlyph.fAdvanceY;) |
| 398 | |
| 399 | tmsProc(tms, pos); |
| 400 | SkIPoint fixedLoc; |
| 401 | alignProc(tms.fLoc, metricGlyph, &fixedLoc); |
| 402 | |
| 403 | SkFixed fx = fixedLoc.fX + halfSampleX; |
| 404 | SkFixed fy = fixedLoc.fY + halfSampleY; |
| 405 | |
| 406 | // have to call again, now that we've been "aligned" |
| 407 | const SkGlyph& glyph = glyphCacheProc(cache, ¤tText, |
| 408 | fx & fxMask, fy & fyMask); |
| 409 | // the assumption is that the metrics haven't changed |
| 410 | SkASSERT(prevAdvX == glyph.fAdvanceX); |
| 411 | SkASSERT(prevAdvY == glyph.fAdvanceY); |
| 412 | SkASSERT(glyph.fWidth); |
| 413 | |
| 414 | this->drawPackedGlyph(GrGlyph::Pack(glyph.getGlyphID(), |
| 415 | glyph.getSubXFixed(), |
| 416 | glyph.getSubYFixed()), |
| 417 | SkFixedFloorToFixed(fx), |
| 418 | SkFixedFloorToFixed(fy), |
| 419 | fontScaler); |
| 420 | } |
| 421 | pos += scalarsPerPosition; |
| 422 | } |
| 423 | } |
| 424 | } else { // not subpixel |
| 425 | |
| 426 | if (SkPaint::kLeft_Align == fSkPaint.getTextAlign()) { |
| 427 | while (text < stop) { |
| 428 | // the last 2 parameters are ignored |
| 429 | const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); |
| 430 | |
| 431 | if (glyph.fWidth) { |
| 432 | tmsProc(tms, pos); |
| 433 | |
| 434 | SkFixed fx = SkScalarToFixed(tms.fLoc.fX) + SK_FixedHalf; //halfSampleX; |
| 435 | SkFixed fy = SkScalarToFixed(tms.fLoc.fY) + SK_FixedHalf; //halfSampleY; |
| 436 | this->drawPackedGlyph(GrGlyph::Pack(glyph.getGlyphID(), |
| 437 | glyph.getSubXFixed(), |
| 438 | glyph.getSubYFixed()), |
| 439 | SkFixedFloorToFixed(fx), |
| 440 | SkFixedFloorToFixed(fy), |
| 441 | fontScaler); |
| 442 | } |
| 443 | pos += scalarsPerPosition; |
| 444 | } |
| 445 | } else { |
| 446 | while (text < stop) { |
| 447 | // the last 2 parameters are ignored |
| 448 | const SkGlyph& glyph = glyphCacheProc(cache, &text, 0, 0); |
| 449 | |
| 450 | if (glyph.fWidth) { |
| 451 | tmsProc(tms, pos); |
| 452 | |
| 453 | SkIPoint fixedLoc; |
| 454 | alignProc(tms.fLoc, glyph, &fixedLoc); |
| 455 | |
| 456 | SkFixed fx = fixedLoc.fX + SK_FixedHalf; //halfSampleX; |
| 457 | SkFixed fy = fixedLoc.fY + SK_FixedHalf; //halfSampleY; |
| 458 | this->drawPackedGlyph(GrGlyph::Pack(glyph.getGlyphID(), |
| 459 | glyph.getSubXFixed(), |
| 460 | glyph.getSubYFixed()), |
| 461 | SkFixedFloorToFixed(fx), |
| 462 | SkFixedFloorToFixed(fy), |
| 463 | fontScaler); |
| 464 | } |
| 465 | pos += scalarsPerPosition; |
| 466 | } |
| 467 | } |
| 468 | } |
commit-bot@chromium.org | cbbc481 | 2014-01-30 22:05:47 +0000 | [diff] [blame] | 469 | |
| 470 | this->finish(); |
commit-bot@chromium.org | e8612d9 | 2014-01-28 22:02:07 +0000 | [diff] [blame] | 471 | } |
| 472 | |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 473 | namespace { |
| 474 | |
| 475 | // position + texture coord |
| 476 | extern const GrVertexAttrib gTextVertexAttribs[] = { |
| 477 | {kVec2f_GrVertexAttribType, 0, kPosition_GrVertexAttribBinding}, |
| 478 | {kVec2f_GrVertexAttribType, sizeof(GrPoint), kEffect_GrVertexAttribBinding} |
| 479 | }; |
| 480 | |
| 481 | }; |
| 482 | |
| 483 | void GrBitmapTextContext::drawPackedGlyph(GrGlyph::PackedID packed, |
| 484 | GrFixed vx, GrFixed vy, |
| 485 | GrFontScaler* scaler) { |
| 486 | if (NULL == fDrawTarget) { |
| 487 | return; |
| 488 | } |
commit-bot@chromium.org | e8612d9 | 2014-01-28 22:02:07 +0000 | [diff] [blame] | 489 | |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 490 | if (NULL == fStrike) { |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 491 | #if SK_DISTANCEFIELD_FONTS |
commit-bot@chromium.org | 75a2295 | 2013-11-21 15:09:33 +0000 | [diff] [blame] | 492 | fStrike = fContext->getFontCache()->getStrike(scaler, false); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 493 | #else |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 494 | fStrike = fContext->getFontCache()->getStrike(scaler); |
jvanverth@google.com | d830d13 | 2013-11-11 20:54:09 +0000 | [diff] [blame] | 495 | #endif |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 496 | } |
| 497 | |
| 498 | GrGlyph* glyph = fStrike->getGlyph(packed, scaler); |
| 499 | if (NULL == glyph || glyph->fBounds.isEmpty()) { |
| 500 | return; |
| 501 | } |
| 502 | |
| 503 | vx += SkIntToFixed(glyph->fBounds.fLeft); |
| 504 | vy += SkIntToFixed(glyph->fBounds.fTop); |
| 505 | |
| 506 | // keep them as ints until we've done the clip-test |
| 507 | GrFixed width = glyph->fBounds.width(); |
| 508 | GrFixed height = glyph->fBounds.height(); |
| 509 | |
| 510 | // check if we clipped out |
| 511 | if (true || NULL == glyph->fPlot) { |
| 512 | int x = vx >> 16; |
| 513 | int y = vy >> 16; |
| 514 | if (fClipRect.quickReject(x, y, x + width, y + height)) { |
| 515 | // SkCLZ(3); // so we can set a break-point in the debugger |
| 516 | return; |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | if (NULL == glyph->fPlot) { |
commit-bot@chromium.org | c9b2c88 | 2014-03-03 14:30:25 +0000 | [diff] [blame^] | 521 | if (fStrike->addGlyphToAtlas(glyph, scaler)) { |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 522 | goto HAS_ATLAS; |
| 523 | } |
| 524 | |
| 525 | // try to clear out an unused plot before we flush |
commit-bot@chromium.org | c9b2c88 | 2014-03-03 14:30:25 +0000 | [diff] [blame^] | 526 | if (fContext->getFontCache()->freeUnusedPlot(fStrike) && |
| 527 | fStrike->addGlyphToAtlas(glyph, scaler)) { |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 528 | goto HAS_ATLAS; |
| 529 | } |
| 530 | |
| 531 | if (c_DumpFontCache) { |
| 532 | #ifdef SK_DEVELOPER |
| 533 | fContext->getFontCache()->dump(); |
| 534 | #endif |
| 535 | } |
| 536 | |
commit-bot@chromium.org | c9b2c88 | 2014-03-03 14:30:25 +0000 | [diff] [blame^] | 537 | // flush any accumulated draws to allow us to free up a plot |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 538 | this->flushGlyphs(); |
| 539 | fContext->flush(); |
| 540 | |
commit-bot@chromium.org | c9b2c88 | 2014-03-03 14:30:25 +0000 | [diff] [blame^] | 541 | // we should have an unused plot now |
| 542 | if (fContext->getFontCache()->freeUnusedPlot(fStrike) && |
| 543 | fStrike->addGlyphToAtlas(glyph, scaler)) { |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 544 | goto HAS_ATLAS; |
| 545 | } |
| 546 | |
| 547 | if (NULL == glyph->fPath) { |
| 548 | SkPath* path = SkNEW(SkPath); |
| 549 | if (!scaler->getGlyphPath(glyph->glyphID(), path)) { |
| 550 | // flag the glyph as being dead? |
| 551 | delete path; |
| 552 | return; |
| 553 | } |
| 554 | glyph->fPath = path; |
| 555 | } |
| 556 | |
| 557 | GrContext::AutoMatrix am; |
| 558 | SkMatrix translate; |
| 559 | translate.setTranslate(SkFixedToScalar(vx - SkIntToFixed(glyph->fBounds.fLeft)), |
| 560 | SkFixedToScalar(vy - SkIntToFixed(glyph->fBounds.fTop))); |
| 561 | GrPaint tmpPaint(fPaint); |
| 562 | am.setPreConcat(fContext, translate, &tmpPaint); |
| 563 | SkStrokeRec stroke(SkStrokeRec::kFill_InitStyle); |
| 564 | fContext->drawPath(tmpPaint, *glyph->fPath, stroke); |
| 565 | return; |
| 566 | } |
| 567 | |
| 568 | HAS_ATLAS: |
| 569 | SkASSERT(glyph->fPlot); |
| 570 | GrDrawTarget::DrawToken drawToken = fDrawTarget->getCurrentDrawToken(); |
| 571 | glyph->fPlot->setDrawToken(drawToken); |
| 572 | |
| 573 | // now promote them to fixed (TODO: Rethink using fixed pt). |
| 574 | width = SkIntToFixed(width); |
| 575 | height = SkIntToFixed(height); |
| 576 | |
| 577 | GrTexture* texture = glyph->fPlot->texture(); |
| 578 | SkASSERT(texture); |
| 579 | |
| 580 | if (fCurrTexture != texture || fCurrVertex + 4 > fMaxVertices) { |
| 581 | this->flushGlyphs(); |
| 582 | fCurrTexture = texture; |
| 583 | fCurrTexture->ref(); |
| 584 | } |
| 585 | |
| 586 | if (NULL == fVertices) { |
| 587 | // If we need to reserve vertices allow the draw target to suggest |
| 588 | // a number of verts to reserve and whether to perform a flush. |
| 589 | fMaxVertices = kMinRequestedVerts; |
| 590 | fDrawTarget->drawState()->setVertexAttribs<gTextVertexAttribs>( |
| 591 | SK_ARRAY_COUNT(gTextVertexAttribs)); |
| 592 | bool flush = fDrawTarget->geometryHints(&fMaxVertices, NULL); |
| 593 | if (flush) { |
| 594 | this->flushGlyphs(); |
| 595 | fContext->flush(); |
| 596 | fDrawTarget->drawState()->setVertexAttribs<gTextVertexAttribs>( |
| 597 | SK_ARRAY_COUNT(gTextVertexAttribs)); |
| 598 | } |
| 599 | fMaxVertices = kDefaultRequestedVerts; |
| 600 | // ignore return, no point in flushing again. |
| 601 | fDrawTarget->geometryHints(&fMaxVertices, NULL); |
| 602 | |
| 603 | int maxQuadVertices = 4 * fContext->getQuadIndexBuffer()->maxQuads(); |
| 604 | if (fMaxVertices < kMinRequestedVerts) { |
| 605 | fMaxVertices = kDefaultRequestedVerts; |
| 606 | } else if (fMaxVertices > maxQuadVertices) { |
| 607 | // don't exceed the limit of the index buffer |
| 608 | fMaxVertices = maxQuadVertices; |
| 609 | } |
| 610 | bool success = fDrawTarget->reserveVertexAndIndexSpace(fMaxVertices, |
| 611 | 0, |
| 612 | GrTCast<void**>(&fVertices), |
| 613 | NULL); |
| 614 | GrAlwaysAssert(success); |
| 615 | SkASSERT(2*sizeof(GrPoint) == fDrawTarget->getDrawState().getVertexSize()); |
| 616 | } |
| 617 | |
| 618 | GrFixed tx = SkIntToFixed(glyph->fAtlasLocation.fX); |
| 619 | GrFixed ty = SkIntToFixed(glyph->fAtlasLocation.fY); |
| 620 | |
commit-bot@chromium.org | 3ae0e6c | 2014-02-11 18:24:25 +0000 | [diff] [blame] | 621 | SkRect r; |
| 622 | r.fLeft = SkFixedToFloat(vx); |
| 623 | r.fTop = SkFixedToFloat(vy); |
| 624 | r.fRight = SkFixedToFloat(vx + width); |
| 625 | r.fBottom = SkFixedToFloat(vy + height); |
| 626 | |
| 627 | fVertexBounds.growToInclude(r); |
| 628 | |
| 629 | fVertices[2*fCurrVertex].setRectFan(r.fLeft, r.fTop, r.fRight, r.fBottom, |
jvanverth@google.com | c7a40fa | 2013-10-16 18:15:34 +0000 | [diff] [blame] | 630 | 2 * sizeof(SkPoint)); |
| 631 | fVertices[2*fCurrVertex+1].setRectFan(SkFixedToFloat(texture->normalizeFixedX(tx)), |
| 632 | SkFixedToFloat(texture->normalizeFixedY(ty)), |
| 633 | SkFixedToFloat(texture->normalizeFixedX(tx + width)), |
| 634 | SkFixedToFloat(texture->normalizeFixedY(ty + height)), |
| 635 | 2 * sizeof(SkPoint)); |
| 636 | fCurrVertex += 4; |
| 637 | } |