| /* |
| * 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/ops/GrAtlasTextOp.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/SkScalerCache.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 drawOrigin = 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.findOrCreateStrike(); |
| |
| fDrawable.startSource(fRejects.source()); |
| 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(), drawOrigin, pathPaint); |
| } |
| if (!fRejects.source().empty()) { |
| SkStrikeSpec strikeSpec = SkStrikeSpec::MakeMask( |
| runFont, runPaint, props, fScalerContextFlags, deviceMatrix); |
| |
| auto strike = strikeSpec.findOrCreateStrike(); |
| |
| fDrawable.startBitmapDevice( |
| fRejects.source(), drawOrigin, 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& drawMatrix, |
| 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, drawMatrix, props, contextSupportsDistanceFieldText, options); |
| |
| bool usePaths = |
| useSDFT ? false : SkStrikeSpec::ShouldDrawAsPath(runPaint, runFont, drawMatrix); |
| |
| 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, drawMatrix, options); |
| |
| if (!strikeSpec.isEmpty()) { |
| SkScopedStrikeForGPU strike = strikeSpec.findOrCreateScopedStrike(fStrikeCache); |
| |
| fDrawable.startSource(fRejects.source()); |
| 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, drawMatrix); |
| |
| SkScopedStrikeForGPU strike = strikeSpec.findOrCreateScopedStrike(fStrikeCache); |
| |
| fDrawable.startGPUDevice(fRejects.source(), origin, drawMatrix, 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()); |
| 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()); |
| 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); |
| } |
| |
| #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 SkMatrixProvider& matrixProvider, |
| const SkSurfaceProps& props, |
| const SkGlyphRunList& glyphRunList) const { |
| auto contextPriv = context->priv(); |
| // If we have been abandoned, then don't draw |
| if (contextPriv.abandoned()) { |
| return; |
| } |
| GrTextBlobCache* textBlobCache = contextPriv.getTextBlobCache(); |
| |
| // Get the first paint to use as the key paint. |
| const SkPaint& blobPaint = glyphRunList.paint(); |
| |
| const GrColorInfo& colorInfo = target->colorInfo(); |
| // This is the color the op will use to draw. |
| SkPMColor4f drawingColor = generate_filtered_color(blobPaint, colorInfo); |
| // When creating the a new blob, use the GrColor calculated from the drawingColor. |
| GrColor initialVertexColor = drawingColor.toBytes_RGBA(); |
| |
| SkPoint drawOrigin = glyphRunList.origin(); |
| |
| 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 = blobPaint.getMaskFilter(); |
| bool canCache = glyphRunList.canCache() && !(blobPaint.getPathEffect() || |
| (mf && !as_MFB(mf)->asABlur(&blurRec))); |
| SkScalerContextFlags scalerContextFlags = ComputeScalerContextFlags(colorInfo); |
| |
| sk_sp<GrTextBlob> cachedBlob; |
| 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(blobPaint, hasLCD); |
| |
| key.fPixelGeometry = pixelGeometry; |
| key.fUniqueID = glyphRunList.uniqueID(); |
| key.fStyle = blobPaint.getStyle(); |
| key.fHasBlur = SkToBool(mf); |
| key.fCanonicalColor = canonicalColor; |
| key.fScalerContextFlags = scalerContextFlags; |
| cachedBlob = textBlobCache->find(key); |
| } |
| |
| bool forceW = fOptions.fDistanceFieldVerticesAlwaysHaveW; |
| bool supportsSDFT = context->priv().caps()->shaderCaps()->supportsDistanceFieldText(); |
| SkGlyphRunListPainter* painter = target->glyphPainter(); |
| const SkMatrix& drawMatrix(matrixProvider.localToDevice()); |
| if (cachedBlob) { |
| if (cachedBlob->mustRegenerate(blobPaint, glyphRunList.anyRunsSubpixelPositioned(), |
| blurRec, drawMatrix, drawOrigin)) { |
| // 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(cachedBlob.get()); |
| cachedBlob = textBlobCache->makeCachedBlob(glyphRunList, key, blurRec, drawMatrix, |
| initialVertexColor, forceW); |
| |
| painter->processGlyphRunList( |
| glyphRunList, drawMatrix, props, supportsSDFT, fOptions, cachedBlob.get()); |
| } else { |
| textBlobCache->makeMRU(cachedBlob.get()); |
| } |
| } else { |
| if (canCache) { |
| cachedBlob = textBlobCache->makeCachedBlob(glyphRunList, key, blurRec, drawMatrix, |
| initialVertexColor, forceW); |
| } else { |
| cachedBlob = GrTextBlob::Make(glyphRunList, drawMatrix, initialVertexColor, forceW); |
| } |
| painter->processGlyphRunList( |
| glyphRunList, drawMatrix, props, supportsSDFT, fOptions, cachedBlob.get()); |
| } |
| |
| cachedBlob->addOp(target, props, blobPaint, drawingColor, clip, matrixProvider, drawOrigin); |
| } |
| |
| #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 SkMatrixProvider& mtxProvider, |
| const char* text, |
| int x, |
| int y) { |
| auto direct = context->priv().asDirectContext(); |
| if (!direct) { |
| return nullptr; |
| } |
| |
| 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(); |
| const SkMatrix& drawMatrix(mtxProvider.localToDevice()); |
| |
| auto drawOrigin = SkPoint::Make(x, y); |
| SkGlyphRunBuilder builder; |
| builder.drawTextUTF8(skPaint, font, text, textLen, drawOrigin); |
| |
| auto glyphRunList = builder.useGlyphRunList(); |
| sk_sp<GrTextBlob> blob; |
| if (!glyphRunList.empty()) { |
| blob = GrTextBlob::Make(glyphRunList, drawMatrix, color, false); |
| SkGlyphRunListPainter* painter = rtc->textTarget()->glyphPainter(); |
| painter->processGlyphRunList( |
| glyphRunList, drawMatrix, surfaceProps, |
| context->priv().caps()->shaderCaps()->supportsDistanceFieldText(), |
| textContext->fOptions, blob.get()); |
| } |
| |
| SkASSERT(blob->firstSubRun()->fType == GrTextBlob::SubRunType::kDirectMask); |
| return blob->makeOp(blob->firstSubRun(), |
| mtxProvider, |
| drawOrigin, |
| SkIRect::MakeEmpty(), |
| skPaint, |
| filteredColor, |
| surfaceProps, |
| 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)}{ } |