Index: src/gpu/batches/GrAtlasTextBatch.cpp |
diff --git a/src/gpu/batches/GrAtlasTextBatch.cpp b/src/gpu/batches/GrAtlasTextBatch.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..91088c0c59068811a94fea0a48c9ba6dca51d39a |
--- /dev/null |
+++ b/src/gpu/batches/GrAtlasTextBatch.cpp |
@@ -0,0 +1,507 @@ |
+/* |
+ * Copyright 2015 Google Inc. |
+ * |
+ * Use of this source code is governed by a BSD-style license that can be |
+ * found in the LICENSE file. |
+ */ |
+ |
+#include "GrAtlasTextBatch.h" |
+ |
+#include "GrBatchFontCache.h" |
+#include "GrBatchFlushState.h" |
+#include "GrBatchTest.h" |
+#include "GrResourceProvider.h" |
+ |
+#include "SkDistanceFieldGen.h" |
+#include "SkGlyphCache.h" |
+ |
+#include "effects/GrBitmapTextGeoProc.h" |
+#include "effects/GrDistanceFieldGeoProc.h" |
+ |
+static inline GrColor skcolor_to_grcolor_nopremultiply(SkColor c) { |
+ unsigned r = SkColorGetR(c); |
+ unsigned g = SkColorGetG(c); |
+ unsigned b = SkColorGetB(c); |
+ return GrColorPackRGBA(r, g, b, 0xff); |
+} |
+ |
+static const int kDistanceAdjustLumShift = 5; |
+ |
+SkString GrAtlasTextBatch::dumpInfo() const { |
+ SkString str; |
+ |
+ for (int i = 0; i < fGeoCount; ++i) { |
+ str.appendf("%d: Color: 0x%08x Trans: %.2f,%.2f Runs: %d\n", |
+ i, |
+ fGeoData[i].fColor, |
+ fGeoData[i].fTransX, |
+ fGeoData[i].fTransY, |
+ fGeoData[i].fBlob->fRunCount); |
+ } |
+ |
+ str.append(INHERITED::dumpInfo()); |
+ return str; |
+} |
+ |
+void GrAtlasTextBatch::getInvariantOutputColor(GrInitInvariantOutput* out) const { |
+ if (kColorBitmapMask_MaskType == fMaskType) { |
+ out->setUnknownFourComponents(); |
+ } else { |
+ out->setKnownFourComponents(fBatch.fColor); |
+ } |
+} |
+ |
+void GrAtlasTextBatch::getInvariantOutputCoverage(GrInitInvariantOutput* out) const { |
+ switch (fMaskType) { |
+ case kGrayscaleDistanceField_MaskType: |
+ case kGrayscaleCoverageMask_MaskType: |
+ out->setUnknownSingleComponent(); |
+ break; |
+ case kLCDCoverageMask_MaskType: |
+ case kLCDDistanceField_MaskType: |
+ out->setUnknownOpaqueFourComponents(); |
+ out->setUsingLCDCoverage(); |
+ break; |
+ case kColorBitmapMask_MaskType: |
+ out->setKnownSingleComponent(0xff); |
+ } |
+} |
+ |
+void GrAtlasTextBatch::initBatchTracker(const GrPipelineOptimizations& opt) { |
+ // Handle any color overrides |
+ if (!opt.readsColor()) { |
+ fGeoData[0].fColor = GrColor_ILLEGAL; |
+ } |
+ opt.getOverrideColorIfSet(&fGeoData[0].fColor); |
+ |
+ // setup batch properties |
+ fBatch.fColorIgnored = !opt.readsColor(); |
+ fBatch.fColor = fGeoData[0].fColor; |
+ fBatch.fUsesLocalCoords = opt.readsLocalCoords(); |
+ fBatch.fCoverageIgnored = !opt.readsCoverage(); |
+} |
+ |
+void GrAtlasTextBatch::onPrepareDraws(Target* target) { |
+ // if we have RGB, then we won't have any SkShaders so no need to use a localmatrix. |
+ // TODO actually only invert if we don't have RGBA |
+ SkMatrix localMatrix; |
+ if (this->usesLocalCoords() && !this->viewMatrix().invert(&localMatrix)) { |
+ SkDebugf("Cannot invert viewmatrix\n"); |
+ return; |
+ } |
+ |
+ GrTexture* texture = fFontCache->getTexture(this->maskFormat()); |
+ if (!texture) { |
+ SkDebugf("Could not allocate backing texture for atlas\n"); |
+ return; |
+ } |
+ |
+ bool usesDistanceFields = this->usesDistanceFields(); |
+ GrMaskFormat maskFormat = this->maskFormat(); |
+ bool isLCD = this->isLCD(); |
+ |
+ SkAutoTUnref<const GrGeometryProcessor> gp; |
+ if (usesDistanceFields) { |
+ gp.reset(this->setupDfProcessor(this->viewMatrix(), fFilteredColor, this->color(), |
+ texture)); |
+ } else { |
+ GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kNone_FilterMode); |
+ gp.reset(GrBitmapTextGeoProc::Create(this->color(), |
+ texture, |
+ params, |
+ maskFormat, |
+ localMatrix, |
+ this->usesLocalCoords())); |
+ } |
+ |
+ FlushInfo flushInfo; |
+ flushInfo.fGlyphsToFlush = 0; |
+ size_t vertexStride = gp->getVertexStride(); |
+ SkASSERT(vertexStride == (usesDistanceFields ? |
+ GetVertexStrideDf(maskFormat, isLCD) : |
+ GetVertexStride(maskFormat))); |
+ |
+ target->initDraw(gp, this->pipeline()); |
+ |
+ int glyphCount = this->numGlyphs(); |
+ const GrVertexBuffer* vertexBuffer; |
+ |
+ void* vertices = target->makeVertexSpace(vertexStride, |
+ glyphCount * kVerticesPerGlyph, |
+ &vertexBuffer, |
+ &flushInfo.fVertexOffset); |
+ flushInfo.fVertexBuffer.reset(SkRef(vertexBuffer)); |
+ flushInfo.fIndexBuffer.reset(target->resourceProvider()->refQuadIndexBuffer()); |
+ if (!vertices || !flushInfo.fVertexBuffer) { |
+ SkDebugf("Could not allocate vertices\n"); |
+ return; |
+ } |
+ |
+ unsigned char* currVertex = reinterpret_cast<unsigned char*>(vertices); |
+ |
+ // We cache some values to avoid going to the glyphcache for the same fontScaler twice |
+ // in a row |
+ const SkDescriptor* desc = nullptr; |
+ SkGlyphCache* cache = nullptr; |
+ GrFontScaler* scaler = nullptr; |
+ SkTypeface* typeface = nullptr; |
+ |
+ for (int i = 0; i < fGeoCount; i++) { |
+ Geometry& args = fGeoData[i]; |
+ Blob* blob = args.fBlob; |
+ Run& run = blob->fRuns[args.fRun]; |
+ TextInfo& info = run.fSubRunInfo[args.fSubRun]; |
+ |
+ uint64_t currentAtlasGen = fFontCache->atlasGeneration(maskFormat); |
+ bool regenerateTextureCoords = info.fAtlasGeneration != currentAtlasGen || |
+ info.fStrike->isAbandoned(); |
+ bool regenerateColors; |
+ if (usesDistanceFields) { |
+ regenerateColors = !isLCD && run.fColor != args.fColor; |
+ } else { |
+ regenerateColors = kA8_GrMaskFormat == maskFormat && run.fColor != args.fColor; |
+ } |
+ bool regeneratePositions = args.fTransX != 0.f || args.fTransY != 0.f; |
+ int glyphCount = info.fGlyphEndIndex - info.fGlyphStartIndex; |
+ |
+ // We regenerate both texture coords and colors in the blob itself, and update the |
+ // atlas generation. If we don't end up purging any unused plots, we can avoid |
+ // regenerating the coords. We could take a finer grained approach to updating texture |
+ // coords but its not clear if the extra bookkeeping would offset any gains. |
+ // To avoid looping over the glyphs twice, we do one loop and conditionally update color |
+ // or coords as needed. One final note, if we have to break a run for an atlas eviction |
+ // then we can't really trust the atlas has all of the correct data. Atlas evictions |
+ // should be pretty rare, so we just always regenerate in those cases |
+ if (regenerateTextureCoords || regenerateColors || regeneratePositions) { |
+ // first regenerate texture coordinates / colors if need be |
+ bool brokenRun = false; |
+ |
+ // Because the GrBatchFontCache may evict the strike a blob depends on using for |
+ // generating its texture coords, we have to track whether or not the strike has |
+ // been abandoned. If it hasn't been abandoned, then we can use the GrGlyph*s as is |
+ // otherwise we have to get the new strike, and use that to get the correct glyphs. |
+ // Because we do not have the packed ids, and thus can't look up our glyphs in the |
+ // new strike, we instead keep our ref to the old strike and use the packed ids from |
+ // it. These ids will still be valid as long as we hold the ref. When we are done |
+ // updating our cache of the GrGlyph*s, we drop our ref on the old strike |
+ bool regenerateGlyphs = false; |
+ GrBatchTextStrike* strike = nullptr; |
+ if (regenerateTextureCoords) { |
+ info.fBulkUseToken.reset(); |
+ |
+ // We can reuse if we have a valid strike and our descriptors / typeface are the |
+ // same. The override descriptor is only for the non distance field text within |
+ // a run |
+ const SkDescriptor* newDesc = (run.fOverrideDescriptor && !usesDistanceFields) ? |
+ run.fOverrideDescriptor->getDesc() : |
+ run.fDescriptor.getDesc(); |
+ if (!cache || !SkTypeface::Equal(typeface, run.fTypeface) || |
+ !(desc->equals(*newDesc))) { |
+ if (cache) { |
+ SkGlyphCache::AttachCache(cache); |
+ } |
+ desc = newDesc; |
+ cache = SkGlyphCache::DetachCache(run.fTypeface, desc); |
+ scaler = GrTextContext::GetGrFontScaler(cache); |
+ strike = info.fStrike; |
+ typeface = run.fTypeface; |
+ } |
+ |
+ if (info.fStrike->isAbandoned()) { |
+ regenerateGlyphs = true; |
+ strike = fFontCache->getStrike(scaler); |
+ } else { |
+ strike = info.fStrike; |
+ } |
+ } |
+ |
+ for (int glyphIdx = 0; glyphIdx < glyphCount; glyphIdx++) { |
+ if (regenerateTextureCoords) { |
+ size_t glyphOffset = glyphIdx + info.fGlyphStartIndex; |
+ |
+ GrGlyph* glyph = blob->fGlyphs[glyphOffset]; |
+ GrGlyph::PackedID id = glyph->fPackedID; |
+ const SkGlyph& skGlyph = scaler->grToSkGlyph(id); |
+ if (regenerateGlyphs) { |
+ // Get the id from the old glyph, and use the new strike to lookup |
+ // the glyph. |
+ blob->fGlyphs[glyphOffset] = strike->getGlyph(skGlyph, id, maskFormat, |
+ scaler); |
+ } |
+ glyph = blob->fGlyphs[glyphOffset]; |
+ SkASSERT(glyph); |
+ SkASSERT(id == glyph->fPackedID); |
+ // We want to be able to assert this but cannot for testing purposes. |
+ // once skbug:4143 has landed we can revist this assert |
+ //SkASSERT(glyph->fMaskFormat == this->maskFormat()); |
+ |
+ if (!fFontCache->hasGlyph(glyph) && |
+ !strike->addGlyphToAtlas(target, glyph, scaler, skGlyph, maskFormat)) { |
+ this->flush(target, &flushInfo); |
+ target->initDraw(gp, this->pipeline()); |
+ brokenRun = glyphIdx > 0; |
+ |
+ SkDEBUGCODE(bool success =) strike->addGlyphToAtlas(target, |
+ glyph, |
+ scaler, |
+ skGlyph, |
+ maskFormat); |
+ SkASSERT(success); |
+ } |
+ fFontCache->addGlyphToBulkAndSetUseToken(&info.fBulkUseToken, glyph, |
+ target->currentToken()); |
+ |
+ // Texture coords are the last vertex attribute so we get a pointer to the |
+ // first one and then map with stride in regenerateTextureCoords |
+ intptr_t vertex = reinterpret_cast<intptr_t>(blob->fVertices); |
+ vertex += info.fVertexStartIndex; |
+ vertex += vertexStride * glyphIdx * kVerticesPerGlyph; |
+ vertex += vertexStride - sizeof(SkIPoint16); |
+ |
+ this->regenerateTextureCoords(glyph, vertex, vertexStride); |
+ } |
+ |
+ if (regenerateColors) { |
+ intptr_t vertex = reinterpret_cast<intptr_t>(blob->fVertices); |
+ vertex += info.fVertexStartIndex; |
+ vertex += vertexStride * glyphIdx * kVerticesPerGlyph + sizeof(SkPoint); |
+ this->regenerateColors(vertex, vertexStride, args.fColor); |
+ } |
+ |
+ if (regeneratePositions) { |
+ intptr_t vertex = reinterpret_cast<intptr_t>(blob->fVertices); |
+ vertex += info.fVertexStartIndex; |
+ vertex += vertexStride * glyphIdx * kVerticesPerGlyph; |
+ SkScalar transX = args.fTransX; |
+ SkScalar transY = args.fTransY; |
+ this->regeneratePositions(vertex, vertexStride, transX, transY); |
+ } |
+ flushInfo.fGlyphsToFlush++; |
+ } |
+ |
+ // We my have changed the color so update it here |
+ run.fColor = args.fColor; |
+ if (regenerateTextureCoords) { |
+ if (regenerateGlyphs) { |
+ info.fStrike.reset(SkRef(strike)); |
+ } |
+ info.fAtlasGeneration = brokenRun ? GrBatchAtlas::kInvalidAtlasGeneration : |
+ fFontCache->atlasGeneration(maskFormat); |
+ } |
+ } else { |
+ flushInfo.fGlyphsToFlush += glyphCount; |
+ |
+ // set use tokens for all of the glyphs in our subrun. This is only valid if we |
+ // have a valid atlas generation |
+ fFontCache->setUseTokenBulk(info.fBulkUseToken, target->currentToken(), maskFormat); |
+ } |
+ |
+ // now copy all vertices |
+ size_t byteCount = info.fVertexEndIndex - info.fVertexStartIndex; |
+ memcpy(currVertex, blob->fVertices + info.fVertexStartIndex, byteCount); |
+ |
+ currVertex += byteCount; |
+ } |
+ // Make sure to attach the last cache if applicable |
+ if (cache) { |
+ SkGlyphCache::AttachCache(cache); |
+ } |
+ this->flush(target, &flushInfo); |
+} |
+ |
+void GrAtlasTextBatch::regenerateTextureCoords(GrGlyph* glyph, intptr_t vertex, |
+ size_t vertexStride) { |
+ int width = glyph->fBounds.width(); |
+ int height = glyph->fBounds.height(); |
+ |
+ int u0, v0, u1, v1; |
+ if (this->usesDistanceFields()) { |
+ u0 = glyph->fAtlasLocation.fX + SK_DistanceFieldInset; |
+ v0 = glyph->fAtlasLocation.fY + SK_DistanceFieldInset; |
+ u1 = u0 + width - 2 * SK_DistanceFieldInset; |
+ v1 = v0 + height - 2 * SK_DistanceFieldInset; |
+ } else { |
+ u0 = glyph->fAtlasLocation.fX; |
+ v0 = glyph->fAtlasLocation.fY; |
+ u1 = u0 + width; |
+ v1 = v0 + height; |
+ } |
+ |
+ SkIPoint16* textureCoords; |
+ // V0 |
+ textureCoords = reinterpret_cast<SkIPoint16*>(vertex); |
+ textureCoords->set(u0, v0); |
+ vertex += vertexStride; |
+ |
+ // V1 |
+ textureCoords = reinterpret_cast<SkIPoint16*>(vertex); |
+ textureCoords->set(u0, v1); |
+ vertex += vertexStride; |
+ |
+ // V2 |
+ textureCoords = reinterpret_cast<SkIPoint16*>(vertex); |
+ textureCoords->set(u1, v1); |
+ vertex += vertexStride; |
+ |
+ // V3 |
+ textureCoords = reinterpret_cast<SkIPoint16*>(vertex); |
+ textureCoords->set(u1, v0); |
+} |
+ |
+void GrAtlasTextBatch::regenerateColors(intptr_t vertex, size_t vertexStride, GrColor color) { |
+ for (int i = 0; i < kVerticesPerGlyph; i++) { |
+ SkColor* vcolor = reinterpret_cast<SkColor*>(vertex); |
+ *vcolor = color; |
+ vertex += vertexStride; |
+ } |
+} |
+ |
+void GrAtlasTextBatch::regeneratePositions(intptr_t vertex, size_t vertexStride, SkScalar transX, |
+ SkScalar transY) { |
+ for (int i = 0; i < kVerticesPerGlyph; i++) { |
+ SkPoint* point = reinterpret_cast<SkPoint*>(vertex); |
+ point->fX += transX; |
+ point->fY += transY; |
+ vertex += vertexStride; |
+ } |
+} |
+ |
+void GrAtlasTextBatch::flush(GrVertexBatch::Target* target, FlushInfo* flushInfo) { |
+ GrVertices vertices; |
+ int maxGlyphsPerDraw = flushInfo->fIndexBuffer->maxQuads(); |
+ vertices.initInstanced(kTriangles_GrPrimitiveType, flushInfo->fVertexBuffer, |
+ flushInfo->fIndexBuffer, flushInfo->fVertexOffset, |
+ kVerticesPerGlyph, kIndicesPerGlyph, flushInfo->fGlyphsToFlush, |
+ maxGlyphsPerDraw); |
+ target->draw(vertices); |
+ flushInfo->fVertexOffset += kVerticesPerGlyph * flushInfo->fGlyphsToFlush; |
+ flushInfo->fGlyphsToFlush = 0; |
+} |
+ |
+bool GrAtlasTextBatch::onCombineIfPossible(GrBatch* t, const GrCaps& caps) { |
+ GrAtlasTextBatch* that = t->cast<GrAtlasTextBatch>(); |
+ if (!GrPipeline::CanCombine(*this->pipeline(), this->bounds(), *that->pipeline(), |
+ that->bounds(), caps)) { |
+ return false; |
+ } |
+ |
+ if (fMaskType != that->fMaskType) { |
+ return false; |
+ } |
+ |
+ if (!this->usesDistanceFields()) { |
+ // TODO we can often batch across LCD text if we have dual source blending and don't |
+ // have to use the blend constant |
+ if (kGrayscaleCoverageMask_MaskType != fMaskType && this->color() != that->color()) { |
+ return false; |
+ } |
+ if (this->usesLocalCoords() && !this->viewMatrix().cheapEqualTo(that->viewMatrix())) { |
+ return false; |
+ } |
+ } else { |
+ if (!this->viewMatrix().cheapEqualTo(that->viewMatrix())) { |
+ return false; |
+ } |
+ |
+ if (fFilteredColor != that->fFilteredColor) { |
+ return false; |
+ } |
+ |
+ if (fUseBGR != that->fUseBGR) { |
+ return false; |
+ } |
+ |
+ // TODO see note above |
+ if (kLCDDistanceField_MaskType == fMaskType && this->color() != that->color()) { |
+ return false; |
+ } |
+ } |
+ |
+ fBatch.fNumGlyphs += that->numGlyphs(); |
+ |
+ // Reallocate space for geo data if necessary and then import that's geo data. |
+ int newGeoCount = that->fGeoCount + fGeoCount; |
+ // We assume (and here enforce) that the allocation size is the smallest power of two that |
+ // is greater than or equal to the number of geometries (and at least |
+ // kMinGeometryAllocated). |
+ int newAllocSize = GrNextPow2(newGeoCount); |
+ int currAllocSize = SkTMax<int>(kMinGeometryAllocated, GrNextPow2(fGeoCount)); |
+ |
+ if (newGeoCount > currAllocSize) { |
+ fGeoData.realloc(newAllocSize); |
+ } |
+ |
+ memcpy(&fGeoData[fGeoCount], that->fGeoData.get(), that->fGeoCount * sizeof(Geometry)); |
+ // We steal the ref on the blobs from the other TextBatch and set its count to 0 so that |
+ // it doesn't try to unref them. |
+#ifdef SK_DEBUG |
+ for (int i = 0; i < that->fGeoCount; ++i) { |
+ that->fGeoData.get()[i].fBlob = (Blob*)0x1; |
+ } |
+#endif |
+ that->fGeoCount = 0; |
+ fGeoCount = newGeoCount; |
+ |
+ this->joinBounds(that->bounds()); |
+ return true; |
+} |
+ |
+// TODO just use class params |
+// TODO trying to figure out why lcd is so whack |
+GrGeometryProcessor* GrAtlasTextBatch::setupDfProcessor(const SkMatrix& viewMatrix, |
+ SkColor filteredColor, |
+ GrColor color, GrTexture* texture) { |
+ GrTextureParams params(SkShader::kClamp_TileMode, GrTextureParams::kBilerp_FilterMode); |
+ bool isLCD = this->isLCD(); |
+ // set up any flags |
+ uint32_t flags = viewMatrix.isSimilarity() ? kSimilarity_DistanceFieldEffectFlag : 0; |
+ |
+ // see if we need to create a new effect |
+ if (isLCD) { |
+ flags |= kUseLCD_DistanceFieldEffectFlag; |
+ flags |= viewMatrix.rectStaysRect() ? kRectToRect_DistanceFieldEffectFlag : 0; |
+ flags |= fUseBGR ? kBGR_DistanceFieldEffectFlag : 0; |
+ |
+ GrColor colorNoPreMul = skcolor_to_grcolor_nopremultiply(filteredColor); |
+ |
+ float redCorrection = |
+ (*fDistanceAdjustTable)[GrColorUnpackR(colorNoPreMul) >> kDistanceAdjustLumShift]; |
+ float greenCorrection = |
+ (*fDistanceAdjustTable)[GrColorUnpackG(colorNoPreMul) >> kDistanceAdjustLumShift]; |
+ float blueCorrection = |
+ (*fDistanceAdjustTable)[GrColorUnpackB(colorNoPreMul) >> kDistanceAdjustLumShift]; |
+ GrDistanceFieldLCDTextGeoProc::DistanceAdjust widthAdjust = |
+ GrDistanceFieldLCDTextGeoProc::DistanceAdjust::Make(redCorrection, |
+ greenCorrection, |
+ blueCorrection); |
+ |
+ return GrDistanceFieldLCDTextGeoProc::Create(color, |
+ viewMatrix, |
+ texture, |
+ params, |
+ widthAdjust, |
+ flags, |
+ this->usesLocalCoords()); |
+ } else { |
+ flags |= kColorAttr_DistanceFieldEffectFlag; |
+#ifdef SK_GAMMA_APPLY_TO_A8 |
+ U8CPU lum = SkColorSpaceLuminance::computeLuminance(SK_GAMMA_EXPONENT, filteredColor); |
+ float correction = (*fDistanceAdjustTable)[lum >> kDistanceAdjustLumShift]; |
+ return GrDistanceFieldA8TextGeoProc::Create(color, |
+ viewMatrix, |
+ texture, |
+ params, |
+ correction, |
+ flags, |
+ this->usesLocalCoords()); |
+#else |
+ return GrDistanceFieldA8TextGeoProc::Create(color, |
+ viewMatrix, |
+ texture, |
+ params, |
+ flags, |
+ this->usesLocalCoords()); |
+#endif |
+ } |
+ |
+} |