| /* |
| * Copyright 2018 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "src/core/SkGlyphRunPainter.h" |
| |
| #if SK_SUPPORT_GPU |
| #include "include/private/GrRecordingContext.h" |
| #include "src/gpu/GrCaps.h" |
| #include "src/gpu/GrColorInfo.h" |
| #include "src/gpu/GrContextPriv.h" |
| #include "src/gpu/GrRecordingContextPriv.h" |
| #include "src/gpu/GrRenderTargetContext.h" |
| #include "src/gpu/SkGr.h" |
| #include "src/gpu/text/GrTextBlobCache.h" |
| #include "src/gpu/text/GrTextContext.h" |
| #endif |
| |
| #include "include/core/SkColorFilter.h" |
| #include "include/core/SkMaskFilter.h" |
| #include "include/core/SkPathEffect.h" |
| #include "include/private/SkTDArray.h" |
| #include "src/core/SkDevice.h" |
| #include "src/core/SkDistanceFieldGen.h" |
| #include "src/core/SkDraw.h" |
| #include "src/core/SkEnumerate.h" |
| #include "src/core/SkFontPriv.h" |
| #include "src/core/SkRasterClip.h" |
| #include "src/core/SkStrike.h" |
| #include "src/core/SkStrikeCache.h" |
| #include "src/core/SkStrikeForGPU.h" |
| #include "src/core/SkStrikeSpec.h" |
| #include "src/core/SkTraceEvent.h" |
| |
| #include <climits> |
| |
| // -- SkGlyphRunListPainter ------------------------------------------------------------------------ |
| SkGlyphRunListPainter::SkGlyphRunListPainter(const SkSurfaceProps& props, |
| SkColorType colorType, |
| SkScalerContextFlags flags, |
| SkStrikeForGPUCacheInterface* strikeCache) |
| : fDeviceProps{props} |
| , fBitmapFallbackProps{SkSurfaceProps{props.flags(), kUnknown_SkPixelGeometry}} |
| , fColorType{colorType}, fScalerContextFlags{flags} |
| , fStrikeCache{strikeCache} {} |
| |
| // TODO: unify with code in GrTextContext.cpp |
| static SkScalerContextFlags compute_scaler_context_flags(const SkColorSpace* cs) { |
| // If we're doing linear blending, then we can disable the gamma hacks. |
| // Otherwise, leave them on. In either case, we still want the contrast boost: |
| // TODO: Can we be even smarter about mask gamma based on the dest transfer function? |
| if (cs && cs->gammaIsLinear()) { |
| return SkScalerContextFlags::kBoostContrast; |
| } else { |
| return SkScalerContextFlags::kFakeGammaAndBoostContrast; |
| } |
| } |
| |
| SkGlyphRunListPainter::SkGlyphRunListPainter(const SkSurfaceProps& props, |
| SkColorType colorType, |
| SkColorSpace* cs, |
| SkStrikeForGPUCacheInterface* strikeCache) |
| : SkGlyphRunListPainter(props, colorType, compute_scaler_context_flags(cs), strikeCache) {} |
| |
| #if SK_SUPPORT_GPU |
| SkGlyphRunListPainter::SkGlyphRunListPainter(const SkSurfaceProps& props, const GrColorInfo& csi) |
| : SkGlyphRunListPainter(props, |
| kUnknown_SkColorType, |
| compute_scaler_context_flags(csi.colorSpace()), |
| SkStrikeCache::GlobalStrikeCache()) {} |
| |
| SkGlyphRunListPainter::SkGlyphRunListPainter(const GrRenderTargetContext& rtc) |
| : SkGlyphRunListPainter{rtc.surfaceProps(), rtc.colorInfo()} {} |
| |
| #endif |
| |
| void SkGlyphRunListPainter::drawForBitmapDevice( |
| const SkGlyphRunList& glyphRunList, const SkMatrix& deviceMatrix, |
| const BitmapDevicePainter* bitmapDevice) { |
| ScopedBuffers _ = this->ensureBuffers(glyphRunList); |
| |
| // TODO: fStrikeCache is only used for GPU, and some compilers complain about it during the no |
| // gpu build. Remove when SkGlyphRunListPainter is split into GPU and CPU version. |
| (void)fStrikeCache; |
| |
| const SkPaint& runPaint = glyphRunList.paint(); |
| // The bitmap blitters can only draw lcd text to a N32 bitmap in srcOver. Otherwise, |
| // convert the lcd text into A8 text. The props communicates this to the scaler. |
| auto& props = (kN32_SkColorType == fColorType && runPaint.isSrcOver()) |
| ? fDeviceProps |
| : fBitmapFallbackProps; |
| |
| SkPoint origin = glyphRunList.origin(); |
| for (auto& glyphRun : glyphRunList) { |
| const SkFont& runFont = glyphRun.font(); |
| |
| fRejects.setSource(glyphRun.source()); |
| |
| if (SkStrikeSpec::ShouldDrawAsPath(runPaint, runFont, deviceMatrix)) { |
| |
| SkStrikeSpec strikeSpec = SkStrikeSpec::MakePath( |
| runFont, runPaint, props, fScalerContextFlags); |
| |
| auto strike = strikeSpec.findOrCreateExclusiveStrike(); |
| |
| fDrawable.startSource(fRejects.source(), origin); |
| strike->prepareForPathDrawing(&fDrawable, &fRejects); |
| fRejects.flipRejectsToSource(); |
| |
| // The paint we draw paths with must have the same anti-aliasing state as the runFont |
| // allowing the paths to have the same edging as the glyph masks. |
| SkPaint pathPaint = runPaint; |
| pathPaint.setAntiAlias(runFont.hasSomeAntiAliasing()); |
| |
| bitmapDevice->paintPaths(&fDrawable, strikeSpec.strikeToSourceRatio(), pathPaint); |
| } |
| if (!fRejects.source().empty()) { |
| SkStrikeSpec strikeSpec = SkStrikeSpec::MakeMask( |
| runFont, runPaint, props, fScalerContextFlags, deviceMatrix); |
| |
| auto strike = strikeSpec.findOrCreateExclusiveStrike(); |
| |
| fDrawable.startDevice(fRejects.source(), origin, deviceMatrix, strike->roundingSpec()); |
| strike->prepareForDrawingMasksCPU(&fDrawable); |
| bitmapDevice->paintMasks(&fDrawable, runPaint); |
| } |
| |
| // TODO: have the mask stage above reject the glyphs that are too big, and handle the |
| // rejects in a more sophisticated stage. |
| } |
| } |
| |
| #if SK_SUPPORT_GPU |
| void SkGlyphRunListPainter::processGlyphRunList(const SkGlyphRunList& glyphRunList, |
| const SkMatrix& viewMatrix, |
| const SkSurfaceProps& props, |
| bool contextSupportsDistanceFieldText, |
| const GrTextContext::Options& options, |
| SkGlyphRunPainterInterface* process) { |
| |
| SkPoint origin = glyphRunList.origin(); |
| const SkPaint& runPaint = glyphRunList.paint(); |
| ScopedBuffers _ = this->ensureBuffers(glyphRunList); |
| |
| for (const auto& glyphRun : glyphRunList) { |
| fRejects.setSource(glyphRun.source()); |
| const SkFont& runFont = glyphRun.font(); |
| |
| |
| bool useSDFT = GrTextContext::CanDrawAsDistanceFields( |
| runPaint, runFont, viewMatrix, props, contextSupportsDistanceFieldText, options); |
| |
| bool usePaths = |
| useSDFT ? false : SkStrikeSpec::ShouldDrawAsPath(runPaint, runFont, viewMatrix); |
| |
| if (useSDFT) { |
| // Process SDFT - This should be the .009% case. |
| SkScalar minScale, maxScale; |
| SkStrikeSpec strikeSpec; |
| std::tie(strikeSpec, minScale, maxScale) = |
| SkStrikeSpec::MakeSDFT(runFont, runPaint, fDeviceProps, viewMatrix, options); |
| |
| if (!strikeSpec.isEmpty()) { |
| SkScopedStrikeForGPU strike = strikeSpec.findOrCreateScopedStrike(fStrikeCache); |
| |
| fDrawable.startSource(fRejects.source(), origin); |
| strike->prepareForSDFTDrawing(&fDrawable, &fRejects); |
| fRejects.flipRejectsToSource(); |
| |
| if (process) { |
| // processSourceSDFT must be called even if there are no glyphs to make sure |
| // runs are set correctly. |
| process->processSourceSDFT( |
| fDrawable.drawable(), strikeSpec, runFont, minScale, maxScale); |
| } |
| } |
| } |
| |
| if (!usePaths && !fRejects.source().empty()) { |
| // Process masks including ARGB - this should be the 99.99% case. |
| |
| SkStrikeSpec strikeSpec = SkStrikeSpec::MakeMask( |
| runFont, runPaint, fDeviceProps, fScalerContextFlags, viewMatrix); |
| |
| SkScopedStrikeForGPU strike = strikeSpec.findOrCreateScopedStrike(fStrikeCache); |
| |
| fDrawable.startDevice(fRejects.source(), origin, viewMatrix, strike->roundingSpec()); |
| strike->prepareForMaskDrawing(&fDrawable, &fRejects); |
| fRejects.flipRejectsToSource(); |
| |
| if (process) { |
| // processDeviceMasks must be called even if there are no glyphs to make sure runs |
| // are set correctly. |
| process->processDeviceMasks(fDrawable.drawable(), strikeSpec); |
| } |
| } |
| |
| // Glyphs are generated in different scales relative to the source space. Masks are drawn |
| // in device space, and SDFT and Paths are draw in a fixed constant space. The |
| // maxDimensionInSourceSpace is used to calculate the factor from strike space to source |
| // space. |
| SkScalar maxDimensionInSourceSpace = 0.0; |
| if (!fRejects.source().empty()) { |
| // Path case - handle big things without color and that have a path. |
| SkStrikeSpec strikeSpec = SkStrikeSpec::MakePath( |
| runFont, runPaint, fDeviceProps, fScalerContextFlags); |
| |
| if (!strikeSpec.isEmpty()) { |
| SkScopedStrikeForGPU strike = strikeSpec.findOrCreateScopedStrike(fStrikeCache); |
| |
| fDrawable.startSource(fRejects.source(), origin); |
| strike->prepareForPathDrawing(&fDrawable, &fRejects); |
| fRejects.flipRejectsToSource(); |
| maxDimensionInSourceSpace = |
| fRejects.rejectedMaxDimension() * strikeSpec.strikeToSourceRatio(); |
| |
| if (process) { |
| // processSourcePaths must be called even if there are no glyphs to make sure |
| // runs are set correctly. |
| process->processSourcePaths(fDrawable.drawable(), runFont, strikeSpec); |
| } |
| } |
| } |
| |
| if (!fRejects.source().empty() && maxDimensionInSourceSpace != 0) { |
| // Draw of last resort. Scale the bitmap to the screen. |
| SkStrikeSpec strikeSpec = SkStrikeSpec::MakeSourceFallback( |
| runFont, runPaint, fDeviceProps, |
| fScalerContextFlags, maxDimensionInSourceSpace); |
| |
| if (!strikeSpec.isEmpty()) { |
| SkScopedStrikeForGPU strike = strikeSpec.findOrCreateScopedStrike(fStrikeCache); |
| |
| fDrawable.startSource(fRejects.source(), origin); |
| strike->prepareForMaskDrawing(&fDrawable, &fRejects); |
| fRejects.flipRejectsToSource(); |
| SkASSERT(fRejects.source().empty()); |
| |
| if (process) { |
| process->processSourceMasks(fDrawable.drawable(), strikeSpec); |
| } |
| } |
| } |
| } // For all glyph runs |
| } |
| #endif // SK_SUPPORT_GPU |
| |
| auto SkGlyphRunListPainter::ensureBuffers(const SkGlyphRunList& glyphRunList) -> ScopedBuffers { |
| size_t size = 0; |
| for (const SkGlyphRun& run : glyphRunList) { |
| size = std::max(run.runSize(), size); |
| } |
| return ScopedBuffers(this, size); |
| } |
| |
| SkGlyphRunListPainter::ScopedBuffers |
| SkGlyphRunListPainter::ensureBuffers(const SkGlyphRun& glyphRun) { |
| return ScopedBuffers(this, glyphRun.runSize()); |
| } |
| |
| #if SK_SUPPORT_GPU |
| // -- GrTextContext -------------------------------------------------------------------------------- |
| SkPMColor4f generate_filtered_color(const SkPaint& paint, const GrColorInfo& colorInfo) { |
| SkColor4f filteredColor = paint.getColor4f(); |
| if (auto* xform = colorInfo.colorSpaceXformFromSRGB()) { |
| filteredColor = xform->apply(filteredColor); |
| } |
| if (paint.getColorFilter() != nullptr) { |
| filteredColor = paint.getColorFilter()->filterColor4f(filteredColor, colorInfo.colorSpace(), |
| colorInfo.colorSpace()); |
| } |
| return filteredColor.premul(); |
| } |
| |
| void GrTextContext::drawGlyphRunList( |
| GrRecordingContext* context, GrTextTarget* target, const GrClip& clip, |
| const SkMatrix& viewMatrix, const SkSurfaceProps& props, |
| const SkGlyphRunList& glyphRunList) { |
| SkPoint origin = glyphRunList.origin(); |
| |
| // Get the first paint to use as the key paint. |
| const SkPaint& listPaint = glyphRunList.paint(); |
| |
| SkPMColor4f filteredColor = generate_filtered_color(listPaint, target->colorInfo()); |
| GrColor color = generate_filtered_color(listPaint, target->colorInfo()).toBytes_RGBA(); |
| |
| // If we have been abandoned, then don't draw |
| if (context->priv().abandoned()) { |
| return; |
| } |
| |
| SkMaskFilterBase::BlurRec blurRec; |
| // It might be worth caching these things, but its not clear at this time |
| // TODO for animated mask filters, this will fill up our cache. We need a safeguard here |
| const SkMaskFilter* mf = listPaint.getMaskFilter(); |
| bool canCache = glyphRunList.canCache() && !(listPaint.getPathEffect() || |
| (mf && !as_MFB(mf)->asABlur(&blurRec))); |
| SkScalerContextFlags scalerContextFlags = ComputeScalerContextFlags(target->colorInfo()); |
| |
| auto grStrikeCache = context->priv().getGrStrikeCache(); |
| GrTextBlobCache* textBlobCache = context->priv().getTextBlobCache(); |
| |
| sk_sp<GrTextBlob> cacheBlob; |
| GrTextBlob::Key key; |
| if (canCache) { |
| bool hasLCD = glyphRunList.anyRunsLCD(); |
| |
| // We canonicalize all non-lcd draws to use kUnknown_SkPixelGeometry |
| SkPixelGeometry pixelGeometry = hasLCD ? props.pixelGeometry() : |
| kUnknown_SkPixelGeometry; |
| |
| // TODO we want to figure out a way to be able to use the canonical color on LCD text, |
| // see the note on ComputeCanonicalColor above. We pick a dummy value for LCD text to |
| // ensure we always match the same key |
| GrColor canonicalColor = hasLCD ? SK_ColorTRANSPARENT : |
| ComputeCanonicalColor(listPaint, hasLCD); |
| |
| key.fPixelGeometry = pixelGeometry; |
| key.fUniqueID = glyphRunList.uniqueID(); |
| key.fStyle = listPaint.getStyle(); |
| key.fHasBlur = SkToBool(mf); |
| key.fCanonicalColor = canonicalColor; |
| key.fScalerContextFlags = scalerContextFlags; |
| cacheBlob = textBlobCache->find(key); |
| } |
| |
| bool forceW = fOptions.fDistanceFieldVerticesAlwaysHaveW; |
| if (cacheBlob) { |
| if (cacheBlob->mustRegenerate(listPaint, glyphRunList.anyRunsSubpixelPositioned(), |
| blurRec, viewMatrix, origin.x(),origin.y())) { |
| // We have to remake the blob because changes may invalidate our masks. |
| // TODO we could probably get away reuse most of the time if the pointer is unique, |
| // but we'd have to clear the subrun information |
| textBlobCache->remove(cacheBlob.get()); |
| cacheBlob = textBlobCache->makeCachedBlob( |
| glyphRunList, grStrikeCache, key, blurRec, viewMatrix, color, forceW); |
| cacheBlob->generateFromGlyphRunList( |
| *context->priv().caps()->shaderCaps(), fOptions, |
| listPaint, viewMatrix, props, |
| glyphRunList, target->glyphPainter()); |
| } else { |
| textBlobCache->makeMRU(cacheBlob.get()); |
| |
| if (CACHE_SANITY_CHECK) { |
| sk_sp<GrTextBlob> sanityBlob(textBlobCache->makeBlob( |
| glyphRunList, grStrikeCache, viewMatrix, color, forceW)); |
| sanityBlob->setupKey(key, blurRec, listPaint); |
| cacheBlob->generateFromGlyphRunList( |
| *context->priv().caps()->shaderCaps(), fOptions, |
| listPaint, viewMatrix, props, glyphRunList, |
| target->glyphPainter()); |
| GrTextBlob::AssertEqual(*sanityBlob, *cacheBlob); |
| } |
| } |
| } else { |
| if (canCache) { |
| cacheBlob = textBlobCache->makeCachedBlob( |
| glyphRunList, grStrikeCache, key, blurRec, viewMatrix, color, forceW); |
| } else { |
| cacheBlob = textBlobCache->makeBlob( |
| glyphRunList, grStrikeCache, viewMatrix, color, forceW); |
| } |
| cacheBlob->generateFromGlyphRunList( |
| *context->priv().caps()->shaderCaps(), fOptions, listPaint, |
| viewMatrix, props, glyphRunList, |
| target->glyphPainter()); |
| } |
| |
| cacheBlob->flush(target, props, fDistanceAdjustTable.get(), listPaint, filteredColor, |
| clip, viewMatrix, origin.x(), origin.y()); |
| } |
| |
| #if GR_TEST_UTILS |
| |
| #include "src/gpu/GrRecordingContextPriv.h" |
| #include "src/gpu/GrRenderTargetContext.h" |
| |
| std::unique_ptr<GrDrawOp> GrTextContext::createOp_TestingOnly(GrRecordingContext* context, |
| GrTextContext* textContext, |
| GrRenderTargetContext* rtc, |
| const SkPaint& skPaint, |
| const SkFont& font, |
| const SkMatrix& viewMatrix, |
| const char* text, |
| int x, |
| int y) { |
| auto direct = context->priv().asDirectContext(); |
| if (!direct) { |
| return nullptr; |
| } |
| |
| auto strikeCache = direct->priv().getGrStrikeCache(); |
| |
| static SkSurfaceProps surfaceProps(SkSurfaceProps::kLegacyFontHost_InitType); |
| |
| size_t textLen = (int)strlen(text); |
| |
| SkPMColor4f filteredColor = generate_filtered_color(skPaint, rtc->colorInfo()); |
| GrColor color = filteredColor.toBytes_RGBA(); |
| |
| auto origin = SkPoint::Make(x, y); |
| SkGlyphRunBuilder builder; |
| builder.drawTextUTF8(skPaint, font, text, textLen, origin); |
| |
| auto glyphRunList = builder.useGlyphRunList(); |
| sk_sp<GrTextBlob> blob; |
| if (!glyphRunList.empty()) { |
| blob = direct->priv().getTextBlobCache()->makeBlob( |
| glyphRunList, strikeCache, viewMatrix, color, false); |
| blob->generateFromGlyphRunList( |
| *context->priv().caps()->shaderCaps(), textContext->fOptions, |
| skPaint, viewMatrix, surfaceProps, |
| glyphRunList, rtc->textTarget()->glyphPainter()); |
| } |
| |
| return blob->test_makeOp(textLen, viewMatrix, x, y, skPaint, filteredColor, surfaceProps, |
| textContext->dfAdjustTable(), rtc->textTarget()); |
| } |
| |
| #endif // GR_TEST_UTILS |
| #endif // SK_SUPPORT_GPU |
| |
| SkGlyphRunListPainter::ScopedBuffers::ScopedBuffers(SkGlyphRunListPainter* painter, size_t size) |
| : fPainter{painter} { |
| fPainter->fDrawable.ensureSize(size); |
| } |
| |
| SkGlyphRunListPainter::ScopedBuffers::~ScopedBuffers() { |
| fPainter->fDrawable.reset(); |
| fPainter->fRejects.reset(); |
| } |
| |
| SkVector SkGlyphPositionRoundingSpec::HalfAxisSampleFreq(bool isSubpixel, SkAxisAlignment axisAlignment) { |
| if (!isSubpixel) { |
| return {SK_ScalarHalf, SK_ScalarHalf}; |
| } else { |
| switch (axisAlignment) { |
| case kX_SkAxisAlignment: |
| return {SkPackedGlyphID::kSubpixelRound, SK_ScalarHalf}; |
| case kY_SkAxisAlignment: |
| return {SK_ScalarHalf, SkPackedGlyphID::kSubpixelRound}; |
| case kNone_SkAxisAlignment: |
| return {SkPackedGlyphID::kSubpixelRound, SkPackedGlyphID::kSubpixelRound}; |
| } |
| } |
| |
| // Some compilers need this. |
| return {0, 0}; |
| } |
| |
| SkIPoint SkGlyphPositionRoundingSpec::IgnorePositionMask( |
| bool isSubpixel, SkAxisAlignment axisAlignment) { |
| return SkIPoint::Make((!isSubpixel || axisAlignment == kY_SkAxisAlignment) ? 0 : ~0, |
| (!isSubpixel || axisAlignment == kX_SkAxisAlignment) ? 0 : ~0); |
| } |
| |
| SkIPoint SkGlyphPositionRoundingSpec::IgnorePositionFieldMask(bool isSubpixel, |
| SkAxisAlignment axisAlignment) { |
| SkIPoint ignoreMask = IgnorePositionMask(isSubpixel, axisAlignment); |
| SkIPoint answer{ignoreMask.x() & SkPackedGlyphID::kXYFieldMask.x(), |
| ignoreMask.y() & SkPackedGlyphID::kXYFieldMask.y()}; |
| return answer; |
| } |
| |
| SkGlyphPositionRoundingSpec::SkGlyphPositionRoundingSpec( |
| bool isSubpixel,SkAxisAlignment axisAlignment) |
| : halfAxisSampleFreq{HalfAxisSampleFreq(isSubpixel, axisAlignment)} |
| , ignorePositionMask{IgnorePositionMask(isSubpixel, axisAlignment)} |
| , ignorePositionFieldMask {IgnorePositionFieldMask(isSubpixel, axisAlignment)}{ } |