| /* |
| * 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 "GrAtlasTextOp.h" |
| |
| #include "GrContext.h" |
| #include "GrOpFlushState.h" |
| #include "GrResourceProvider.h" |
| |
| #include "SkGlyphCache.h" |
| #include "SkMathPriv.h" |
| |
| #include "effects/GrBitmapTextGeoProc.h" |
| #include "effects/GrDistanceFieldGeoProc.h" |
| #include "text/GrAtlasGlyphCache.h" |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| static const int kDistanceAdjustLumShift = 5; |
| |
| SkString GrAtlasTextOp::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].fX, |
| fGeoData[i].fY, |
| fGeoData[i].fBlob->runCount()); |
| } |
| |
| str += fProcessors.dumpProcessors(); |
| str += INHERITED::dumpInfo(); |
| return str; |
| } |
| |
| GrDrawOp::FixedFunctionFlags GrAtlasTextOp::fixedFunctionFlags() const { |
| return FixedFunctionFlags::kNone; |
| } |
| |
| GrDrawOp::RequiresDstTexture GrAtlasTextOp::finalize(const GrCaps& caps, |
| const GrAppliedClip* clip, |
| GrPixelConfigIsClamped dstIsClamped) { |
| GrProcessorAnalysisCoverage coverage; |
| GrProcessorAnalysisColor color; |
| if (kColorBitmapMask_MaskType == fMaskType) { |
| color.setToUnknown(); |
| } else { |
| color.setToConstant(fColor); |
| } |
| switch (fMaskType) { |
| case kGrayscaleCoverageMask_MaskType: |
| case kAliasedDistanceField_MaskType: |
| case kGrayscaleDistanceField_MaskType: |
| coverage = GrProcessorAnalysisCoverage::kSingleChannel; |
| break; |
| case kLCDCoverageMask_MaskType: |
| case kLCDDistanceField_MaskType: |
| case kLCDBGRDistanceField_MaskType: |
| coverage = GrProcessorAnalysisCoverage::kLCD; |
| break; |
| case kColorBitmapMask_MaskType: |
| coverage = GrProcessorAnalysisCoverage::kNone; |
| break; |
| } |
| auto analysis = fProcessors.finalize(color, coverage, clip, false, caps, dstIsClamped, &fColor); |
| fUsesLocalCoords = analysis.usesLocalCoords(); |
| fCanCombineOnTouchOrOverlap = |
| !analysis.requiresDstTexture() && |
| !(fProcessors.xferProcessor() && fProcessors.xferProcessor()->xferBarrierType(caps)); |
| return analysis.requiresDstTexture() ? RequiresDstTexture::kYes : RequiresDstTexture::kNo; |
| } |
| |
| static void clip_quads(const SkIRect& clipRect, |
| unsigned char* currVertex, unsigned char* blobVertices, |
| size_t vertexStride, int glyphCount) { |
| for (int i = 0; i < glyphCount; ++i) { |
| SkPoint* blobPositionLT = reinterpret_cast<SkPoint*>(blobVertices); |
| SkPoint* blobPositionRB = reinterpret_cast<SkPoint*>(blobVertices + 3*vertexStride); |
| |
| // positions for bitmap glyphs are pixel boundary aligned |
| SkIRect positionRect = SkIRect::MakeLTRB(blobPositionLT->fX, |
| blobPositionLT->fY, |
| blobPositionRB->fX, |
| blobPositionRB->fY); |
| if (clipRect.contains(positionRect)) { |
| memcpy(currVertex, blobVertices, 4 * vertexStride); |
| currVertex += 4 * vertexStride; |
| } else { |
| // Pull out some more data that we'll need. |
| // In the LCD case the color will be garbage, but we'll overwrite it with the texcoords |
| // and it avoids a lot of conditionals. |
| SkColor color = *reinterpret_cast<SkColor*>(blobVertices + sizeof(SkPoint)); |
| size_t coordOffset = vertexStride - 2*sizeof(uint16_t); |
| uint16_t* blobCoordsLT = reinterpret_cast<uint16_t*>(blobVertices + coordOffset); |
| uint16_t* blobCoordsRB = reinterpret_cast<uint16_t*>(blobVertices + 3*vertexStride + |
| coordOffset); |
| // Pull out the texel coordinates and texture index bits |
| uint16_t coordsRectL = blobCoordsLT[0] >> 1; |
| uint16_t coordsRectT = blobCoordsLT[1] >> 1; |
| uint16_t coordsRectR = blobCoordsRB[0] >> 1; |
| uint16_t coordsRectB = blobCoordsRB[1] >> 1; |
| uint16_t pageIndexX = blobCoordsLT[0] & 0x1; |
| uint16_t pageIndexY = blobCoordsLT[1] & 0x1; |
| |
| int positionRectWidth = positionRect.width(); |
| int positionRectHeight = positionRect.height(); |
| SkASSERT(positionRectWidth == (coordsRectR - coordsRectL)); |
| SkASSERT(positionRectHeight == (coordsRectB - coordsRectT)); |
| |
| // Clip position and texCoords to the clipRect |
| unsigned int delta; |
| delta = SkTMin(SkTMax(clipRect.fLeft - positionRect.fLeft, 0), positionRectWidth); |
| coordsRectL += delta; |
| positionRect.fLeft += delta; |
| |
| delta = SkTMin(SkTMax(clipRect.fTop - positionRect.fTop, 0), positionRectHeight); |
| coordsRectT += delta; |
| positionRect.fTop += delta; |
| |
| delta = SkTMin(SkTMax(positionRect.fRight - clipRect.fRight, 0), positionRectWidth); |
| coordsRectR -= delta; |
| positionRect.fRight -= delta; |
| |
| delta = SkTMin(SkTMax(positionRect.fBottom - clipRect.fBottom, 0), positionRectHeight); |
| coordsRectB -= delta; |
| positionRect.fBottom -= delta; |
| |
| // Repack texel coordinates and index |
| coordsRectL = coordsRectL << 1 | pageIndexX; |
| coordsRectT = coordsRectT << 1 | pageIndexY; |
| coordsRectR = coordsRectR << 1 | pageIndexX; |
| coordsRectB = coordsRectB << 1 | pageIndexY; |
| |
| // Set new positions and coords |
| SkPoint* currPosition = reinterpret_cast<SkPoint*>(currVertex); |
| currPosition->fX = positionRect.fLeft; |
| currPosition->fY = positionRect.fTop; |
| *(reinterpret_cast<SkColor*>(currVertex + sizeof(SkPoint))) = color; |
| uint16_t* currCoords = reinterpret_cast<uint16_t*>(currVertex + coordOffset); |
| currCoords[0] = coordsRectL; |
| currCoords[1] = coordsRectT; |
| currVertex += vertexStride; |
| |
| currPosition = reinterpret_cast<SkPoint*>(currVertex); |
| currPosition->fX = positionRect.fLeft; |
| currPosition->fY = positionRect.fBottom; |
| *(reinterpret_cast<SkColor*>(currVertex + sizeof(SkPoint))) = color; |
| currCoords = reinterpret_cast<uint16_t*>(currVertex + coordOffset); |
| currCoords[0] = coordsRectL; |
| currCoords[1] = coordsRectB; |
| currVertex += vertexStride; |
| |
| currPosition = reinterpret_cast<SkPoint*>(currVertex); |
| currPosition->fX = positionRect.fRight; |
| currPosition->fY = positionRect.fTop; |
| *(reinterpret_cast<SkColor*>(currVertex + sizeof(SkPoint))) = color; |
| currCoords = reinterpret_cast<uint16_t*>(currVertex + coordOffset); |
| currCoords[0] = coordsRectR; |
| currCoords[1] = coordsRectT; |
| currVertex += vertexStride; |
| |
| currPosition = reinterpret_cast<SkPoint*>(currVertex); |
| currPosition->fX = positionRect.fRight; |
| currPosition->fY = positionRect.fBottom; |
| *(reinterpret_cast<SkColor*>(currVertex + sizeof(SkPoint))) = color; |
| currCoords = reinterpret_cast<uint16_t*>(currVertex + coordOffset); |
| currCoords[0] = coordsRectR; |
| currCoords[1] = coordsRectB; |
| currVertex += vertexStride; |
| } |
| |
| blobVertices += 4 * vertexStride; |
| } |
| } |
| |
| void GrAtlasTextOp::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; |
| } |
| |
| GrMaskFormat maskFormat = this->maskFormat(); |
| |
| uint32_t atlasPageCount = fFontCache->getAtlasPageCount(maskFormat); |
| const sk_sp<GrTextureProxy>* proxies = fFontCache->getProxies(maskFormat); |
| if (!atlasPageCount || !proxies[0]) { |
| SkDebugf("Could not allocate backing texture for atlas\n"); |
| return; |
| } |
| |
| FlushInfo flushInfo; |
| flushInfo.fPipeline = |
| target->makePipeline(fSRGBFlags, std::move(fProcessors), target->detachAppliedClip()); |
| if (this->usesDistanceFields()) { |
| flushInfo.fGeometryProcessor = this->setupDfProcessor(); |
| } else { |
| flushInfo.fGeometryProcessor = GrBitmapTextGeoProc::Make( |
| this->color(), proxies, GrSamplerState::ClampNearest(), maskFormat, |
| localMatrix, this->usesLocalCoords()); |
| } |
| |
| flushInfo.fGlyphsToFlush = 0; |
| size_t vertexStride = flushInfo.fGeometryProcessor->getVertexStride(); |
| SkASSERT(vertexStride == GrAtlasTextBlob::GetVertexStride(maskFormat)); |
| |
| int glyphCount = this->numGlyphs(); |
| const GrBuffer* vertexBuffer; |
| |
| void* vertices = target->makeVertexSpace( |
| vertexStride, glyphCount * kVerticesPerGlyph, &vertexBuffer, &flushInfo.fVertexOffset); |
| flushInfo.fVertexBuffer.reset(SkRef(vertexBuffer)); |
| flushInfo.fIndexBuffer = target->resourceProvider()->refQuadIndexBuffer(); |
| if (!vertices || !flushInfo.fVertexBuffer) { |
| SkDebugf("Could not allocate vertices\n"); |
| return; |
| } |
| |
| unsigned char* currVertex = reinterpret_cast<unsigned char*>(vertices); |
| |
| GrBlobRegenHelper helper(this, target, &flushInfo); |
| SkAutoGlyphCache glyphCache; |
| // each of these is a SubRun |
| for (int i = 0; i < fGeoCount; i++) { |
| const Geometry& args = fGeoData[i]; |
| Blob* blob = args.fBlob; |
| size_t byteCount; |
| void* blobVertices; |
| int subRunGlyphCount; |
| blob->regenInOp(target, fFontCache, &helper, args.fRun, args.fSubRun, &glyphCache, |
| vertexStride, args.fViewMatrix, args.fX, args.fY, args.fColor, |
| &blobVertices, &byteCount, &subRunGlyphCount); |
| |
| // now copy all vertices |
| if (args.fClipRect.isEmpty()) { |
| memcpy(currVertex, blobVertices, byteCount); |
| } else { |
| clip_quads(args.fClipRect, currVertex, reinterpret_cast<unsigned char*>(blobVertices), |
| vertexStride, subRunGlyphCount); |
| } |
| |
| currVertex += byteCount; |
| } |
| |
| this->flush(target, &flushInfo); |
| } |
| |
| void GrAtlasTextOp::flush(GrMeshDrawOp::Target* target, FlushInfo* flushInfo) const { |
| GrGeometryProcessor* gp = flushInfo->fGeometryProcessor.get(); |
| GrMaskFormat maskFormat = this->maskFormat(); |
| if (gp->numTextureSamplers() != (int)fFontCache->getAtlasPageCount(maskFormat)) { |
| // During preparation the number of atlas pages has increased. |
| // Update the proxies used in the GP to match. |
| if (this->usesDistanceFields()) { |
| if (this->isLCD()) { |
| reinterpret_cast<GrDistanceFieldLCDTextGeoProc*>(gp)->addNewProxies( |
| fFontCache->getProxies(maskFormat), GrSamplerState::ClampBilerp()); |
| } else { |
| reinterpret_cast<GrDistanceFieldA8TextGeoProc*>(gp)->addNewProxies( |
| fFontCache->getProxies(maskFormat), GrSamplerState::ClampBilerp()); |
| } |
| } else { |
| reinterpret_cast<GrBitmapTextGeoProc*>(gp)->addNewProxies( |
| fFontCache->getProxies(maskFormat), GrSamplerState::ClampNearest()); |
| } |
| } |
| |
| GrMesh mesh(GrPrimitiveType::kTriangles); |
| int maxGlyphsPerDraw = |
| static_cast<int>(flushInfo->fIndexBuffer->gpuMemorySize() / sizeof(uint16_t) / 6); |
| mesh.setIndexedPatterned(flushInfo->fIndexBuffer.get(), kIndicesPerGlyph, kVerticesPerGlyph, |
| flushInfo->fGlyphsToFlush, maxGlyphsPerDraw); |
| mesh.setVertexData(flushInfo->fVertexBuffer.get(), flushInfo->fVertexOffset); |
| target->draw(flushInfo->fGeometryProcessor.get(), flushInfo->fPipeline, mesh); |
| flushInfo->fVertexOffset += kVerticesPerGlyph * flushInfo->fGlyphsToFlush; |
| flushInfo->fGlyphsToFlush = 0; |
| } |
| |
| bool GrAtlasTextOp::onCombineIfPossible(GrOp* t, const GrCaps& caps) { |
| GrAtlasTextOp* that = t->cast<GrAtlasTextOp>(); |
| if (fProcessors != that->fProcessors) { |
| return false; |
| } |
| |
| if (!fCanCombineOnTouchOrOverlap && GrRectsTouchOrOverlap(this->bounds(), that->bounds())) { |
| return false; |
| } |
| |
| if (fMaskType != that->fMaskType) { |
| return false; |
| } |
| |
| if (!this->usesDistanceFields()) { |
| if (kColorBitmapMask_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 (fLuminanceColor != that->fLuminanceColor) { |
| return false; |
| } |
| } |
| |
| 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); |
| } |
| |
| // We steal the ref on the blobs from the other AtlasTextOp and set its count to 0 so that |
| // it doesn't try to unref them. |
| memcpy(&fGeoData[fGeoCount], that->fGeoData.get(), that->fGeoCount * sizeof(Geometry)); |
| #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); |
| return true; |
| } |
| |
| // TODO trying to figure out why lcd is so whack |
| // (see comments in GrAtlasTextContext::ComputeCanonicalColor) |
| sk_sp<GrGeometryProcessor> GrAtlasTextOp::setupDfProcessor() const { |
| const SkMatrix& viewMatrix = this->viewMatrix(); |
| const sk_sp<GrTextureProxy>* p = fFontCache->getProxies(this->maskFormat()); |
| bool isLCD = this->isLCD(); |
| // set up any flags |
| uint32_t flags = viewMatrix.isSimilarity() ? kSimilarity_DistanceFieldEffectFlag : 0; |
| flags |= viewMatrix.isScaleTranslate() ? kScaleOnly_DistanceFieldEffectFlag : 0; |
| flags |= fUseGammaCorrectDistanceTable ? kGammaCorrect_DistanceFieldEffectFlag : 0; |
| flags |= (kAliasedDistanceField_MaskType == fMaskType) ? kAliased_DistanceFieldEffectFlag : 0; |
| |
| // see if we need to create a new effect |
| if (isLCD) { |
| flags |= kUseLCD_DistanceFieldEffectFlag; |
| flags |= (kLCDBGRDistanceField_MaskType == fMaskType) ? kBGR_DistanceFieldEffectFlag : 0; |
| |
| float redCorrection = fDistanceAdjustTable->getAdjustment( |
| SkColorGetR(fLuminanceColor) >> kDistanceAdjustLumShift, |
| fUseGammaCorrectDistanceTable); |
| float greenCorrection = fDistanceAdjustTable->getAdjustment( |
| SkColorGetG(fLuminanceColor) >> kDistanceAdjustLumShift, |
| fUseGammaCorrectDistanceTable); |
| float blueCorrection = fDistanceAdjustTable->getAdjustment( |
| SkColorGetB(fLuminanceColor) >> kDistanceAdjustLumShift, |
| fUseGammaCorrectDistanceTable); |
| GrDistanceFieldLCDTextGeoProc::DistanceAdjust widthAdjust = |
| GrDistanceFieldLCDTextGeoProc::DistanceAdjust::Make( |
| redCorrection, greenCorrection, blueCorrection); |
| |
| return GrDistanceFieldLCDTextGeoProc::Make(this->color(), viewMatrix, p, |
| GrSamplerState::ClampBilerp(), widthAdjust, |
| flags, this->usesLocalCoords()); |
| } else { |
| #ifdef SK_GAMMA_APPLY_TO_A8 |
| float correction = 0; |
| if (kAliasedDistanceField_MaskType != fMaskType) { |
| U8CPU lum = SkColorSpaceLuminance::computeLuminance(SK_GAMMA_EXPONENT, |
| fLuminanceColor); |
| correction = fDistanceAdjustTable->getAdjustment(lum >> kDistanceAdjustLumShift, |
| fUseGammaCorrectDistanceTable); |
| } |
| return GrDistanceFieldA8TextGeoProc::Make(this->color(), viewMatrix, p, |
| GrSamplerState::ClampBilerp(), correction, flags, |
| this->usesLocalCoords()); |
| #else |
| return GrDistanceFieldA8TextGeoProc::Make(this->color(), viewMatrix, p, |
| GrSamplerState::ClampBilerp(), flags, |
| this->usesLocalCoords()); |
| #endif |
| } |
| } |
| |
| void GrBlobRegenHelper::flush() { fOp->flush(fTarget, fFlushInfo); } |
