| /* |
| * 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 "SkGlyphRunPainter.h" |
| |
| #if SK_SUPPORT_GPU |
| #include "GrColorSpaceInfo.h" |
| #include "GrRenderTargetContext.h" |
| #include "SkGr.h" |
| #include "text/GrTextBlobCache.h" |
| #include "text/GrTextContext.h" |
| #endif |
| |
| #include "SkColorFilter.h" |
| #include "SkDevice.h" |
| #include "SkDistanceFieldGen.h" |
| #include "SkDraw.h" |
| #include "SkFontPriv.h" |
| #include "SkGlyphCache.h" |
| #include "SkMaskFilter.h" |
| #include "SkPaintPriv.h" |
| #include "SkPathEffect.h" |
| #include "SkRasterClip.h" |
| #include "SkRemoteGlyphCacheImpl.h" |
| #include "SkStrikeCache.h" |
| #include "SkTDArray.h" |
| #include "SkTraceEvent.h" |
| |
| // -- SkGlyphCacheCommon --------------------------------------------------------------------------- |
| |
| SkVector SkGlyphCacheCommon::PixelRounding(bool isSubpixel, SkAxisAlignment axisAlignment) { |
| if (!isSubpixel) { |
| return {SK_ScalarHalf, SK_ScalarHalf}; |
| } else { |
| static constexpr SkScalar kSubpixelRounding = SkFixedToScalar(SkGlyph::kSubpixelRound); |
| switch (axisAlignment) { |
| case kX_SkAxisAlignment: |
| return {kSubpixelRounding, SK_ScalarHalf}; |
| case kY_SkAxisAlignment: |
| return {SK_ScalarHalf, kSubpixelRounding}; |
| case kNone_SkAxisAlignment: |
| return {kSubpixelRounding, kSubpixelRounding}; |
| } |
| } |
| |
| // Some compilers need this. |
| return {0, 0}; |
| } |
| |
| SkIPoint SkGlyphCacheCommon::SubpixelLookup(SkAxisAlignment axisAlignment, SkPoint position) { |
| // TODO: SkScalarFraction uses truncf to calculate the fraction. This should be floorf. |
| SkFixed lookupX = SkScalarToFixed(SkScalarFraction(position.x())), |
| lookupY = SkScalarToFixed(SkScalarFraction(position.y())); |
| |
| // Snap to a given axis if alignment is requested. |
| if (axisAlignment == kX_SkAxisAlignment) { |
| lookupY = 0; |
| } else if (axisAlignment == kY_SkAxisAlignment) { |
| lookupX = 0; |
| } |
| |
| return {lookupX, lookupY}; |
| } |
| |
| bool SkGlyphCacheCommon::GlyphTooBigForAtlas(const SkGlyph& glyph) { |
| return glyph.fWidth > kSkSideTooBigForAtlas || glyph.fHeight > kSkSideTooBigForAtlas; |
| } |
| |
| // -- SkGlyphRunListPainter ------------------------------------------------------------------------ |
| SkGlyphRunListPainter::SkGlyphRunListPainter( |
| const SkSurfaceProps& props, SkColorType colorType, SkScalerContextFlags flags) |
| : fDeviceProps{props} |
| , fBitmapFallbackProps{SkSurfaceProps{props.flags(), kUnknown_SkPixelGeometry}} |
| , fColorType{colorType} |
| , fScalerContextFlags{flags} {} |
| |
| #if SK_SUPPORT_GPU |
| |
| // TODO: unify with code in GrTextContext.cpp |
| static SkScalerContextFlags compute_scaler_context_flags( |
| const GrColorSpaceInfo& colorSpaceInfo) { |
| // 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 (colorSpaceInfo.isLinearlyBlended()) { |
| return SkScalerContextFlags::kBoostContrast; |
| } else { |
| return SkScalerContextFlags::kFakeGammaAndBoostContrast; |
| } |
| } |
| |
| SkGlyphRunListPainter::SkGlyphRunListPainter( |
| const SkSurfaceProps& props, const GrColorSpaceInfo& csi) |
| : SkGlyphRunListPainter(props, kUnknown_SkColorType, compute_scaler_context_flags(csi)) {} |
| |
| SkGlyphRunListPainter::SkGlyphRunListPainter(const GrRenderTargetContext& rtc) |
| : SkGlyphRunListPainter{rtc.surfaceProps(), rtc.colorSpaceInfo()} {} |
| |
| #endif |
| |
| bool SkGlyphRunListPainter::ShouldDrawAsPath( |
| const SkPaint& paint, const SkFont& font, const SkMatrix& matrix) { |
| // hairline glyphs are fast enough so we don't need to cache them |
| if (SkPaint::kStroke_Style == paint.getStyle() && 0 == paint.getStrokeWidth()) { |
| return true; |
| } |
| |
| // we don't cache perspective |
| if (matrix.hasPerspective()) { |
| return true; |
| } |
| |
| return SkPaint::TooBigToUseCache(matrix, SkFontPriv::MakeTextMatrix(font), 1024); |
| } |
| |
| void SkGlyphRunListPainter::ensureBitmapBuffers(size_t runSize) { |
| if (runSize > fMaxRunSize) { |
| fPositions.reset(runSize); |
| fMaxRunSize = runSize; |
| } |
| } |
| |
| static bool check_glyph_position(SkPoint position) { |
| // Prevent glyphs from being drawn outside of or straddling the edge of device space. |
| // Comparisons written a little weirdly so that NaN coordinates are treated safely. |
| auto gt = [](float a, int b) { return !(a <= (float)b); }; |
| auto lt = [](float a, int b) { return !(a >= (float)b); }; |
| return !(gt(position.fX, INT_MAX - (INT16_MAX + SkTo<int>(UINT16_MAX))) || |
| lt(position.fX, INT_MIN - (INT16_MIN + 0 /*UINT16_MIN*/)) || |
| gt(position.fY, INT_MAX - (INT16_MAX + SkTo<int>(UINT16_MAX))) || |
| lt(position.fY, INT_MIN - (INT16_MIN + 0 /*UINT16_MIN*/))); |
| } |
| |
| static SkMask create_mask(const SkGlyph& glyph, SkPoint position, const void* image) { |
| SkMask mask; |
| int left = SkScalarFloorToInt(position.fX); |
| int top = SkScalarFloorToInt(position.fY); |
| |
| left += glyph.fLeft; |
| top += glyph.fTop; |
| |
| int right = left + glyph.fWidth; |
| int bottom = top + glyph.fHeight; |
| |
| mask.fBounds.set(left, top, right, bottom); |
| SkASSERT(!mask.fBounds.isEmpty()); |
| |
| mask.fImage = (uint8_t*)image; |
| mask.fRowBytes = glyph.rowBytes(); |
| mask.fFormat = static_cast<SkMask::Format>(glyph.fMaskFormat); |
| |
| return mask; |
| } |
| |
| void SkGlyphRunListPainter::drawForBitmapDevice( |
| const SkGlyphRunList& glyphRunList, const SkMatrix& deviceMatrix, |
| const BitmapDevicePainter* bitmapDevice) { |
| |
| SkPoint origin = glyphRunList.origin(); |
| for (auto& glyphRun : glyphRunList) { |
| // 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 && glyphRunList.paint().isSrcOver()) |
| ? fDeviceProps |
| : fBitmapFallbackProps; |
| |
| SkPaint paint{glyphRunList.paint()}; |
| glyphRun.font().LEGACY_applyToPaint(&paint); |
| auto runSize = glyphRun.runSize(); |
| this->ensureBitmapBuffers(runSize); |
| |
| if (ShouldDrawAsPath(paint, glyphRun.font(), deviceMatrix)) { |
| SkMatrix::MakeTrans(origin.x(), origin.y()).mapPoints( |
| fPositions, glyphRun.positions().data(), runSize); |
| // setup our std pathPaint, in hopes of getting hits in the cache |
| SkPaint pathPaint(paint); |
| SkScalar textScale = pathPaint.setupForAsPaths(); |
| |
| auto pathCache = SkStrikeCache::FindOrCreateStrikeExclusive( |
| SkFont::LEGACY_ExtractFromPaint(pathPaint), pathPaint, props, |
| fScalerContextFlags, SkMatrix::I()); |
| |
| SkTDArray<PathAndPos> pathsAndPositions; |
| pathsAndPositions.setReserve(runSize); |
| SkPoint* positionCursor = fPositions; |
| for (auto glyphID : glyphRun.glyphsIDs()) { |
| SkPoint position = *positionCursor++; |
| if (check_glyph_position(position)) { |
| const SkGlyph& glyph = pathCache->getGlyphMetrics(glyphID, {0, 0}); |
| if (!glyph.isEmpty()) { |
| const SkPath* path = pathCache->findPath(glyph); |
| if (path != nullptr) { |
| pathsAndPositions.push_back(PathAndPos{path, position}); |
| } |
| } |
| } |
| } |
| |
| bitmapDevice->paintPaths( |
| SkSpan<const PathAndPos>{pathsAndPositions.begin(), pathsAndPositions.size()}, |
| textScale, |
| paint); |
| } else { |
| auto cache = SkStrikeCache::FindOrCreateStrikeExclusive( |
| SkFont::LEGACY_ExtractFromPaint(paint), paint, props, |
| fScalerContextFlags, deviceMatrix); |
| |
| // Add rounding and origin. |
| SkMatrix matrix = deviceMatrix; |
| matrix.preTranslate(origin.x(), origin.y()); |
| SkPoint rounding = cache->rounding(); |
| matrix.postTranslate(rounding.x(), rounding.y()); |
| matrix.mapPoints(fPositions, glyphRun.positions().data(), runSize); |
| |
| SkTDArray<SkMask> masks; |
| masks.setReserve(runSize); |
| const SkPoint* positionCursor = fPositions; |
| for (auto glyphID : glyphRun.glyphsIDs()) { |
| auto position = *positionCursor++; |
| if (check_glyph_position(position)) { |
| const SkGlyph& glyph = cache->getGlyphMetrics(glyphID, position); |
| const void* image; |
| if (!glyph.isEmpty() && (image = cache->findImage(glyph))) { |
| masks.push_back(create_mask(glyph, position, image)); |
| } |
| } |
| } |
| bitmapDevice->paintMasks(SkSpan<const SkMask>{masks.begin(), masks.size()}, paint); |
| } |
| } |
| } |
| |
| // Getting glyphs to the screen in a fallback situation can be complex. Here is the set of |
| // transformations that have to happen. Normally, they would all be accommodated by the font |
| // scaler, but the atlas has an upper limit to the glyphs it can handle. So the GPU is used to |
| // make up the difference from the smaller atlas size to the larger size needed by the final |
| // transform. Here are the transformations that are applied. |
| // |
| // final transform = [view matrix] * [text scale] * [text size] |
| // |
| // There are three cases: |
| // * Go Fast - view matrix is scale and translate, and all the glyphs are small enough |
| // Just scale the positions, and have the glyph cache handle the view matrix transformation. |
| // The text scale is 1. |
| // * It's complicated - view matrix is not scale and translate, and the glyphs are small enough |
| // The glyph cache does not handle the view matrix, but stores the glyphs at the text size |
| // specified by the run paint. The GPU handles the rotation, etc. specified by the view matrix. |
| // The text scale is 1. |
| // * Too big - The glyphs are too big to fit in the atlas |
| // Reduce the text size so the glyphs will fit in the atlas, but don't apply any |
| // transformations from the view matrix. Calculate a text scale based on that reduction. This |
| // scale factor is used to increase the size of the destination rectangles. The destination |
| // rectangles are then scaled, rotated, etc. by the GPU using the view matrix. |
| void SkGlyphRunListPainter::processARGBFallback( |
| SkScalar maxGlyphDimension, const SkPaint& runPaint, |
| const SkMatrix& viewMatrix, SkScalar textScale, ARGBFallback argbFallback) { |
| SkASSERT(!fARGBGlyphsIDs.empty()); |
| |
| SkScalar maxScale = viewMatrix.getMaxScale(); |
| |
| // This is a conservative estimate of the longest dimension among all the glyph widths and |
| // heights. |
| SkScalar conservativeMaxGlyphDimension = maxGlyphDimension * textScale * maxScale; |
| |
| // If the situation that the matrix is simple, and all the glyphs are small enough. Go fast! |
| bool useFastPath = |
| viewMatrix.isScaleTranslate() && conservativeMaxGlyphDimension <= maxGlyphDimension; |
| |
| auto glyphIDs = SkSpan<const SkGlyphID>{fARGBGlyphsIDs}; |
| |
| // A scaled and translated transform is the common case, and is handled directly in fallback. |
| // Even if the transform is scale and translate, fallback must be careful to use glyphs that |
| // fit in the atlas. If a glyph will not fit in the atlas, then the general transform case is |
| // used to render the glyphs. |
| if (useFastPath) { |
| // Translate the positions to device space. |
| viewMatrix.mapPoints(fARGBPositions.data(), fARGBPositions.size()); |
| for (SkPoint& point : fARGBPositions) { |
| point.fX = SkScalarFloorToScalar(point.fX); |
| point.fY = SkScalarFloorToScalar(point.fY); |
| } |
| |
| auto positions = SkSpan<const SkPoint>{fARGBPositions}; |
| argbFallback(runPaint, glyphIDs, positions, SK_Scalar1, viewMatrix, kTransformDone); |
| |
| } else { |
| // If the matrix is complicated or if scaling is used to fit the glyphs in the cache, |
| // then this case is used. |
| |
| // Subtract 2 to account for the bilerp pad around the glyph |
| SkScalar maxAtlasDimension = SkGlyphCacheCommon::kSkSideTooBigForAtlas - 2; |
| |
| SkScalar runPaintTextSize = runPaint.getTextSize(); |
| |
| // Scale the text size down so the long side of all the glyphs will fit in the atlas. |
| SkScalar reducedTextSize = |
| (maxAtlasDimension / conservativeMaxGlyphDimension) * runPaintTextSize; |
| |
| // If there's a glyph in the font that's particularly large, it's possible |
| // that fScaledFallbackTextSize may end up minimizing too much. We'd rather skip |
| // that glyph than make the others blurry, so we set a minimum size of half the |
| // maximum text size to avoid this case. |
| SkScalar fallbackTextSize = |
| SkScalarFloorToScalar(std::max(reducedTextSize, 0.5f * runPaintTextSize)); |
| |
| // Don't allow the text size to get too big. This will also improve glyph cache hit rate |
| // for larger text sizes. |
| fallbackTextSize = std::min(fallbackTextSize, 256.0f); |
| |
| SkPaint fallbackPaint{runPaint}; |
| fallbackPaint.setTextSize(fallbackTextSize); |
| SkScalar fallbackTextScale = runPaintTextSize / fallbackTextSize; |
| auto positions = SkSpan<const SkPoint>{fARGBPositions}; |
| argbFallback( |
| fallbackPaint, glyphIDs, positions, fallbackTextScale, SkMatrix::I(), kDoTransform); |
| } |
| } |
| |
| // Beware! The following code will end up holding two glyph caches at the same time, but they |
| // will not be the same cache (which would cause two separate caches to be created). |
| template <typename PerEmptyT, typename PerPathT> |
| void SkGlyphRunListPainter::drawGlyphRunAsPathWithARGBFallback( |
| SkGlyphCacheInterface* pathCache, const SkGlyphRun& glyphRun, |
| SkPoint origin, const SkPaint& paint, const SkMatrix& viewMatrix, SkScalar textScale, |
| PerEmptyT&& perEmpty, PerPathT&& perPath, ARGBFallback&& argbFallback) { |
| fARGBGlyphsIDs.clear(); |
| fARGBPositions.clear(); |
| SkScalar maxFallbackDimension{-SK_ScalarInfinity}; |
| |
| const SkPoint* positionCursor = glyphRun.positions().data(); |
| for (auto glyphID : glyphRun.glyphsIDs()) { |
| SkPoint glyphPos = origin + *positionCursor++; |
| const SkGlyph& glyph = pathCache->getGlyphMetrics(glyphID, {0, 0}); |
| if (glyph.isEmpty()) { |
| perEmpty(glyph, glyphPos); |
| } else if (glyph.fMaskFormat != SkMask::kARGB32_Format) { |
| if (pathCache->hasPath(glyph)) { |
| perPath(glyph, glyphPos); |
| } else { |
| perEmpty(glyph, glyphPos); |
| } |
| } else { |
| SkScalar largestDimension = std::max(glyph.fWidth, glyph.fHeight); |
| maxFallbackDimension = std::max(maxFallbackDimension, largestDimension); |
| fARGBGlyphsIDs.push_back(glyphID); |
| fARGBPositions.push_back(glyphPos); |
| } |
| } |
| |
| if (!fARGBGlyphsIDs.empty()) { |
| SkPaint runPaint{paint}; |
| glyphRun.font().LEGACY_applyToPaint(&runPaint); |
| this->processARGBFallback( |
| maxFallbackDimension, runPaint, viewMatrix, textScale, |
| std::move(argbFallback)); |
| |
| } |
| } |
| |
| template <typename PerEmptyT, typename PerGlyphT, typename PerPathT> |
| void SkGlyphRunListPainter::drawGlyphRunAsBMPWithPathFallback( |
| SkGlyphCacheInterface* cache, const SkGlyphRun& glyphRun, |
| SkPoint origin, const SkMatrix& deviceMatrix, |
| PerEmptyT&& perEmpty, PerGlyphT&& perGlyph, PerPathT&& perPath) { |
| |
| SkMatrix mapping = deviceMatrix; |
| mapping.preTranslate(origin.x(), origin.y()); |
| SkVector rounding = cache->rounding(); |
| mapping.postTranslate(rounding.x(), rounding.y()); |
| |
| auto runSize = glyphRun.runSize(); |
| this->ensureBitmapBuffers(runSize); |
| mapping.mapPoints(fPositions, glyphRun.positions().data(), runSize); |
| const SkPoint* mappedPtCursor = fPositions; |
| for (auto glyphID : glyphRun.glyphsIDs()) { |
| auto mappedPt = *mappedPtCursor++; |
| if (SkScalarsAreFinite(mappedPt.x(), mappedPt.y())) { |
| const SkGlyph& glyph = cache->getGlyphMetrics(glyphID, mappedPt); |
| if (glyph.isEmpty()) { |
| perEmpty(glyph, mappedPt); |
| } else if (!SkGlyphCacheCommon::GlyphTooBigForAtlas(glyph)) { |
| // TODO: this check is probably not needed. Remove when proven. |
| if (cache->hasImage(glyph)) { |
| perGlyph(glyph, mappedPt); |
| } else { |
| perEmpty(glyph, mappedPt); |
| } |
| } else { |
| if (cache->hasPath(glyph)) { |
| perPath(glyph, mappedPt); |
| } else { |
| perEmpty(glyph, mappedPt); |
| } |
| } |
| } |
| } |
| } |
| |
| template <typename PerEmptyT, typename PerSDFT, typename PerPathT> |
| void SkGlyphRunListPainter::drawGlyphRunAsSDFWithARGBFallback( |
| SkGlyphCacheInterface* cache, const SkGlyphRun& glyphRun, |
| SkPoint origin, const SkPaint& paint, const SkMatrix& viewMatrix, SkScalar textScale, |
| PerEmptyT&& perEmpty, PerSDFT&& perSDF, PerPathT&& perPath, ARGBFallback&& argbFallback) { |
| fARGBGlyphsIDs.clear(); |
| fARGBPositions.clear(); |
| SkScalar maxFallbackDimension{-SK_ScalarInfinity}; |
| |
| const SkPoint* positionCursor = glyphRun.positions().data(); |
| for (auto glyphID : glyphRun.glyphsIDs()) { |
| const SkGlyph& glyph = cache->getGlyphMetrics(glyphID, {0, 0}); |
| SkPoint glyphPos = origin + *positionCursor++; |
| if (glyph.isEmpty()) { |
| perEmpty(glyph, glyphPos); |
| } else if (glyph.fMaskFormat == SkMask::kSDF_Format) { |
| if (!SkGlyphCacheCommon::GlyphTooBigForAtlas(glyph)) { |
| // TODO: this check is probably not needed. Remove when proven. |
| if (cache->hasImage(glyph)) { |
| perSDF(glyph, glyphPos); |
| } else { |
| perEmpty(glyph, glyphPos); |
| } |
| } else { |
| if (cache->hasPath(glyph)) { |
| perPath(glyph, glyphPos); |
| } else { |
| perEmpty(glyph, glyphPos); |
| } |
| } |
| } else { |
| SkASSERT(glyph.fMaskFormat == SkMask::kARGB32_Format); |
| SkScalar largestDimension = std::max(glyph.fWidth, glyph.fHeight); |
| maxFallbackDimension = std::max(maxFallbackDimension, largestDimension); |
| fARGBGlyphsIDs.push_back(glyphID); |
| fARGBPositions.push_back(glyphPos); |
| } |
| } |
| |
| if (!fARGBGlyphsIDs.empty()) { |
| SkPaint runPaint{paint}; |
| glyphRun.font().LEGACY_applyToPaint(&runPaint); |
| this->processARGBFallback( |
| maxFallbackDimension, runPaint, viewMatrix, textScale, |
| std::move(argbFallback)); |
| } |
| } |
| |
| #if SK_SUPPORT_GPU |
| // -- GrTextContext -------------------------------------------------------------------------------- |
| SkPMColor4f generate_filtered_color(const SkPaint& paint, const GrColorSpaceInfo& colorSpaceInfo) { |
| SkColor4f filteredColor = paint.getColor4f(); |
| if (auto* xform = colorSpaceInfo.colorSpaceXformFromSRGB()) { |
| filteredColor = xform->apply(filteredColor); |
| } |
| if (paint.getColorFilter() != nullptr) { |
| filteredColor = paint.getColorFilter()->filterColor4f(filteredColor, |
| colorSpaceInfo.colorSpace()); |
| } |
| return filteredColor.premul(); |
| } |
| |
| void GrTextContext::drawGlyphRunList( |
| GrContext* 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->colorSpaceInfo()); |
| GrColor color = generate_filtered_color(listPaint, target->colorSpaceInfo()).toBytes_RGBA(); |
| |
| // If we have been abandoned, then don't draw |
| if (context->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->colorSpaceInfo()); |
| |
| auto glyphCache = context->contextPriv().getGlyphCache(); |
| GrTextBlobCache* textBlobCache = context->contextPriv().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); |
| } |
| |
| 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, key, blurRec, listPaint, color); |
| cacheBlob->generateFromGlyphRunList( |
| glyphCache, *context->contextPriv().caps()->shaderCaps(), fOptions, |
| listPaint, scalerContextFlags, viewMatrix, props, |
| glyphRunList, target->glyphPainter()); |
| } else { |
| textBlobCache->makeMRU(cacheBlob.get()); |
| |
| if (CACHE_SANITY_CHECK) { |
| sk_sp<GrTextBlob> sanityBlob(textBlobCache->makeBlob(glyphRunList, color)); |
| sanityBlob->setupKey(key, blurRec, listPaint); |
| cacheBlob->generateFromGlyphRunList( |
| glyphCache, *context->contextPriv().caps()->shaderCaps(), fOptions, |
| listPaint, scalerContextFlags, viewMatrix, props, glyphRunList, |
| target->glyphPainter()); |
| GrTextBlob::AssertEqual(*sanityBlob, *cacheBlob); |
| } |
| } |
| } else { |
| if (canCache) { |
| cacheBlob = textBlobCache->makeCachedBlob(glyphRunList, key, blurRec, listPaint, color); |
| } else { |
| cacheBlob = textBlobCache->makeBlob(glyphRunList, color); |
| } |
| cacheBlob->generateFromGlyphRunList( |
| glyphCache, *context->contextPriv().caps()->shaderCaps(), fOptions, listPaint, |
| scalerContextFlags, viewMatrix, props, glyphRunList, |
| target->glyphPainter()); |
| } |
| |
| cacheBlob->flush(target, props, fDistanceAdjustTable.get(), listPaint, filteredColor, |
| clip, viewMatrix, origin.x(), origin.y()); |
| } |
| |
| void GrTextBlob::SubRun::appendGlyph(GrTextBlob* blob, GrGlyph* glyph, SkRect dstRect) { |
| |
| this->joinGlyphBounds(dstRect); |
| |
| bool hasW = this->hasWCoord(); |
| // glyphs drawn in perspective must always have a w coord. |
| SkASSERT(hasW || !blob->fInitialViewMatrix.hasPerspective()); |
| auto maskFormat = this->maskFormat(); |
| size_t vertexStride = GetVertexStride(maskFormat, hasW); |
| |
| intptr_t vertex = reinterpret_cast<intptr_t>(blob->fVertices + fVertexEndIndex); |
| |
| // We always write the third position component used by SDFs. If it is unused it gets |
| // overwritten. Similarly, we always write the color and the blob will later overwrite it |
| // with texture coords if it is unused. |
| size_t colorOffset = hasW ? sizeof(SkPoint3) : sizeof(SkPoint); |
| // V0 |
| *reinterpret_cast<SkPoint3*>(vertex) = {dstRect.fLeft, dstRect.fTop, 1.f}; |
| *reinterpret_cast<GrColor*>(vertex + colorOffset) = fColor; |
| vertex += vertexStride; |
| |
| // V1 |
| *reinterpret_cast<SkPoint3*>(vertex) = {dstRect.fLeft, dstRect.fBottom, 1.f}; |
| *reinterpret_cast<GrColor*>(vertex + colorOffset) = fColor; |
| vertex += vertexStride; |
| |
| // V2 |
| *reinterpret_cast<SkPoint3*>(vertex) = {dstRect.fRight, dstRect.fTop, 1.f}; |
| *reinterpret_cast<GrColor*>(vertex + colorOffset) = fColor; |
| vertex += vertexStride; |
| |
| // V3 |
| *reinterpret_cast<SkPoint3*>(vertex) = {dstRect.fRight, dstRect.fBottom, 1.f}; |
| *reinterpret_cast<GrColor*>(vertex + colorOffset) = fColor; |
| |
| fVertexEndIndex += vertexStride * kVerticesPerGlyph; |
| blob->fGlyphs[fGlyphEndIndex++] = glyph; |
| } |
| |
| static SkRect rect_to_draw( |
| const SkGlyph& glyph, SkPoint origin, SkScalar textScale, bool isDFT) { |
| |
| SkScalar dx = SkIntToScalar(glyph.fLeft); |
| SkScalar dy = SkIntToScalar(glyph.fTop); |
| SkScalar width = SkIntToScalar(glyph.fWidth); |
| SkScalar height = SkIntToScalar(glyph.fHeight); |
| |
| if (isDFT) { |
| dx += SK_DistanceFieldInset; |
| dy += SK_DistanceFieldInset; |
| width -= 2 * SK_DistanceFieldInset; |
| height -= 2 * SK_DistanceFieldInset; |
| } |
| |
| dx *= textScale; |
| dy *= textScale; |
| width *= textScale; |
| height *= textScale; |
| |
| return SkRect::MakeXYWH(origin.x() + dx, origin.y() + dy, width, height); |
| } |
| |
| void GrTextBlob::Run::appendGlyph(GrTextBlob* blob, |
| const sk_sp<GrTextStrike>& strike, |
| const SkGlyph& skGlyph, GrGlyph::MaskStyle maskStyle, |
| SkPoint origin, SkScalar textRatio, bool needsTransform) { |
| |
| GrGlyph::PackedID id = GrGlyph::Pack(skGlyph.getGlyphID(), |
| skGlyph.getSubXFixed(), |
| skGlyph.getSubYFixed(), |
| maskStyle); |
| GrGlyph* glyph = strike->getGlyph(skGlyph, id); |
| if (!glyph) { |
| return; |
| } |
| |
| SkASSERT(skGlyph.fWidth == glyph->width()); |
| SkASSERT(skGlyph.fHeight == glyph->height()); |
| |
| bool isDFT = maskStyle == GrGlyph::kDistance_MaskStyle; |
| |
| SkRect glyphRect = rect_to_draw(skGlyph, origin, textRatio, isDFT); |
| if (!glyphRect.isEmpty()) { |
| GrMaskFormat format = glyph->fMaskFormat; |
| |
| SubRun* subRun = &fSubRunInfo.back(); |
| if (fInitialized && subRun->maskFormat() != format) { |
| subRun = pushBackSubRun(fDescriptor, fColor); |
| subRun->setStrike(strike); |
| } else if (!fInitialized) { |
| subRun->setStrike(strike); |
| } |
| |
| fInitialized = true; |
| subRun->setMaskFormat(format); |
| subRun->setNeedsTransform(needsTransform); |
| |
| subRun->appendGlyph(blob, glyph, glyphRect); |
| } |
| } |
| |
| |
| void GrTextBlob::generateFromGlyphRunList(GrGlyphCache* glyphCache, |
| const GrShaderCaps& shaderCaps, |
| const GrTextContext::Options& options, |
| const SkPaint& paint, |
| SkScalerContextFlags scalerContextFlags, |
| const SkMatrix& viewMatrix, |
| const SkSurfaceProps& props, |
| const SkGlyphRunList& glyphRunList, |
| SkGlyphRunListPainter* glyphPainter) { |
| struct ARGBFallbackHelper { |
| void operator ()(const SkPaint& fallbackPaint, SkSpan<const SkGlyphID> glyphIDs, |
| SkSpan<const SkPoint> positions, SkScalar textScale, |
| const SkMatrix& glyphCacheMatrix, |
| SkGlyphRunListPainter::NeedsTransform needsTransform) const { |
| fBlob->setHasBitmap(); |
| fRun->setSubRunHasW(glyphCacheMatrix.hasPerspective()); |
| auto subRun = fRun->initARGBFallback(); |
| SkExclusiveStrikePtr fallbackCache = |
| fRun->setupCache(fallbackPaint, fProps, fScalerContextFlags, glyphCacheMatrix); |
| sk_sp<GrTextStrike> strike = fGlyphCache->getStrike(fallbackCache.get()); |
| SkASSERT(strike != nullptr); |
| subRun->setStrike(strike); |
| const SkPoint* glyphPos = positions.data(); |
| for (auto glyphID : glyphIDs) { |
| const SkGlyph& glyph = fallbackCache->getGlyphIDMetrics(glyphID); |
| fRun->appendGlyph(fBlob, strike, glyph, |
| GrGlyph::kCoverage_MaskStyle, |
| *glyphPos, textScale, needsTransform); |
| glyphPos++; |
| } |
| } |
| |
| GrTextBlob* const fBlob; |
| GrTextBlob::Run* fRun; |
| const SkSurfaceProps& fProps; |
| const SkScalerContextFlags fScalerContextFlags; |
| GrGlyphCache* const fGlyphCache; |
| }; |
| |
| SkPoint origin = glyphRunList.origin(); |
| this->initReusableBlob( |
| glyphRunList.paint().computeLuminanceColor(), viewMatrix, origin.x(), origin.y()); |
| |
| for (const auto& glyphRun : glyphRunList) { |
| SkPaint runPaint {glyphRunList.paint()}; |
| glyphRun.font().LEGACY_applyToPaint(&runPaint); |
| Run* run = this->pushBackRun(); |
| |
| run->setRunFontAntiAlias(runPaint.isAntiAlias()); |
| |
| if (GrTextContext::CanDrawAsDistanceFields(runPaint, |
| SkFont::LEGACY_ExtractFromPaint(runPaint), viewMatrix, props, |
| shaderCaps.supportsDistanceFieldText(), options)) { |
| bool hasWCoord = viewMatrix.hasPerspective() |
| || options.fDistanceFieldVerticesAlwaysHaveW; |
| |
| // Setup distance field runPaint and text ratio |
| SkScalar textScale; |
| SkPaint distanceFieldPaint{runPaint}; |
| SkScalerContextFlags flags; |
| GrTextContext::InitDistanceFieldPaint(this, &distanceFieldPaint, viewMatrix, |
| options, &textScale, &flags); |
| this->setHasDistanceField(); |
| run->setSubRunHasDistanceFields(runPaint.isLCDRenderText(), |
| runPaint.isAntiAlias(), hasWCoord); |
| |
| { |
| auto cache = run->setupCache(distanceFieldPaint, props, flags, SkMatrix::I()); |
| |
| sk_sp<GrTextStrike> currStrike = glyphCache->getStrike(cache.get()); |
| |
| auto perEmpty = [](const SkGlyph&, SkPoint) {}; |
| |
| auto perSDF = |
| [this, run, &currStrike, textScale] |
| (const SkGlyph& glyph, SkPoint position) { |
| run->appendGlyph(this, currStrike, |
| glyph, GrGlyph::kDistance_MaskStyle, position, |
| textScale, true); |
| }; |
| |
| auto perPath = |
| [run, textScale] |
| (const SkGlyph& glyph, SkPoint position) { |
| // TODO: path should always be set. Remove when proven. |
| if (const SkPath* glyphPath = glyph.path()) { |
| run->appendPathGlyph(*glyphPath, position, textScale, false); |
| } |
| }; |
| |
| ARGBFallbackHelper argbFallback{this, run, props, scalerContextFlags, |
| glyphCache}; |
| |
| glyphPainter->drawGlyphRunAsSDFWithARGBFallback( |
| cache.get(), glyphRun, origin, runPaint, viewMatrix, textScale, |
| std::move(perEmpty), std::move(perSDF), std::move(perPath), |
| std::move(argbFallback)); |
| } |
| } else if (SkGlyphRunListPainter::ShouldDrawAsPath( |
| glyphRunList.paint(), glyphRun.font(), viewMatrix)) { |
| // The glyphs are big, so use paths to draw them. |
| |
| // Ensure the blob is set for bitmaptext |
| this->setHasBitmap(); |
| |
| // setup our std runPaint, in hopes of getting hits in the cache |
| SkPaint pathPaint(runPaint); |
| |
| auto perEmpty = [](const SkGlyph&, SkPoint) {}; |
| |
| SkScalar textScale = pathPaint.setupForAsPaths(); |
| auto pathCache = SkStrikeCache::FindOrCreateStrikeExclusive( |
| SkFont::LEGACY_ExtractFromPaint(pathPaint), pathPaint, props, |
| scalerContextFlags, SkMatrix::I()); |
| |
| // Given a glyph that is not ARGB, draw it. |
| auto perPath = [textScale, run] |
| (const SkGlyph& glyph, SkPoint position) { |
| // TODO: path should always be set. Remove when proven. |
| if (const SkPath* glyphPath = glyph.path()) { |
| run->appendPathGlyph(*glyphPath, position, textScale, false); |
| } |
| }; |
| |
| ARGBFallbackHelper argbFallback{this, run, props, scalerContextFlags, |
| glyphCache}; |
| |
| glyphPainter->drawGlyphRunAsPathWithARGBFallback( |
| pathCache.get(), glyphRun, origin, runPaint, viewMatrix, textScale, |
| std::move(perEmpty), std::move(perPath), std::move(argbFallback)); |
| } else { |
| // Ensure the blob is set for bitmaptext |
| this->setHasBitmap(); |
| |
| auto cache = run->setupCache(runPaint, props, scalerContextFlags, viewMatrix); |
| |
| sk_sp<GrTextStrike> currStrike = glyphCache->getStrike(cache.get()); |
| |
| auto perEmpty = [](const SkGlyph&, SkPoint) {}; |
| |
| auto perGlyph = |
| [this, run, &currStrike] |
| (const SkGlyph& glyph, SkPoint mappedPt) { |
| SkPoint pt{SkScalarFloorToScalar(mappedPt.fX), |
| SkScalarFloorToScalar(mappedPt.fY)}; |
| run->appendGlyph(this, currStrike, |
| glyph, GrGlyph::kCoverage_MaskStyle, pt, |
| SK_Scalar1, false); |
| }; |
| |
| auto perPath = |
| [run] |
| (const SkGlyph& glyph, SkPoint position) { |
| SkPoint pt{SkScalarFloorToScalar(position.fX), |
| SkScalarFloorToScalar(position.fY)}; |
| // TODO: path should always be set. Remove when proven. |
| if (const SkPath* glyphPath = glyph.path()) { |
| run->appendPathGlyph(*glyphPath, pt, SK_Scalar1, true); |
| } |
| }; |
| |
| glyphPainter->drawGlyphRunAsBMPWithPathFallback( |
| cache.get(), glyphRun, origin, viewMatrix, |
| std::move(perEmpty), std::move(perGlyph), std::move(perPath)); |
| } |
| } |
| } |
| |
| #if GR_TEST_UTILS |
| |
| #include "GrRenderTargetContext.h" |
| |
| std::unique_ptr<GrDrawOp> GrTextContext::createOp_TestingOnly(GrContext* context, |
| GrTextContext* textContext, |
| GrRenderTargetContext* rtc, |
| const SkPaint& skPaint, |
| const SkMatrix& viewMatrix, |
| const char* text, |
| int x, |
| int y) { |
| auto glyphCache = context->contextPriv().getGlyphCache(); |
| |
| static SkSurfaceProps surfaceProps(SkSurfaceProps::kLegacyFontHost_InitType); |
| |
| size_t textLen = (int)strlen(text); |
| |
| SkPMColor4f filteredColor = generate_filtered_color(skPaint, rtc->colorSpaceInfo()); |
| GrColor color = filteredColor.toBytes_RGBA(); |
| |
| auto origin = SkPoint::Make(x, y); |
| SkGlyphRunBuilder builder; |
| builder.drawText(skPaint, text, textLen, origin); |
| |
| auto glyphRunList = builder.useGlyphRunList(); |
| sk_sp<GrTextBlob> blob; |
| if (!glyphRunList.empty()) { |
| blob = context->contextPriv().getTextBlobCache()->makeBlob(glyphRunList, color); |
| // Use the text and textLen below, because we don't want to mess with the paint. |
| SkScalerContextFlags scalerContextFlags = |
| ComputeScalerContextFlags(rtc->colorSpaceInfo()); |
| blob->generateFromGlyphRunList( |
| glyphCache, *context->contextPriv().caps()->shaderCaps(), textContext->fOptions, |
| skPaint, scalerContextFlags, viewMatrix, surfaceProps, |
| glyphRunList, rtc->textTarget()->glyphPainter()); |
| } |
| |
| return blob->test_makeOp(textLen, 0, 0, viewMatrix, x, y, skPaint, filteredColor, surfaceProps, |
| textContext->dfAdjustTable(), rtc->textTarget()); |
| } |
| |
| #endif // GR_TEST_UTILS |
| #endif // SK_SUPPORT_GPU |
| |
| // -- SkTextBlobCacheDiffCanvas::TrackLayerDevice -------------------------------------------------- |
| |
| void SkTextBlobCacheDiffCanvas::TrackLayerDevice::processGlyphRun( |
| const SkPoint& origin, const SkGlyphRun& glyphRun, const SkPaint& paint) { |
| TRACE_EVENT0("skia", "SkTextBlobCacheDiffCanvas::processGlyphRun"); |
| |
| SkPaint runPaint{paint}; |
| glyphRun.font().LEGACY_applyToPaint(&runPaint); |
| const SkMatrix& runMatrix = this->ctm(); |
| |
| // If the matrix has perspective, we fall back to using distance field text or paths. |
| #if SK_SUPPORT_GPU |
| if (this->maybeProcessGlyphRunForDFT(glyphRun, runMatrix, origin, runPaint)) { |
| return; |
| } else |
| #endif |
| if (SkDraw::ShouldDrawTextAsPaths(runPaint, runMatrix)) { |
| this->processGlyphRunForPaths(glyphRun, runMatrix, origin, runPaint); |
| } else { |
| this->processGlyphRunForMask(glyphRun, runMatrix, origin, runPaint); |
| } |
| } |
| |
| void SkTextBlobCacheDiffCanvas::TrackLayerDevice::processGlyphRunForMask( |
| const SkGlyphRun& glyphRun, const SkMatrix& runMatrix, |
| SkPoint origin, const SkPaint& runPaint) { |
| TRACE_EVENT0("skia", "SkTextBlobCacheDiffCanvas::processGlyphRunForMask"); |
| |
| SkScalerContextEffects effects; |
| auto* glyphCacheState = fStrikeServer->getOrCreateCache( |
| runPaint, this->surfaceProps(), runMatrix, |
| SkScalerContextFlags::kFakeGammaAndBoostContrast, &effects); |
| SkASSERT(glyphCacheState); |
| |
| auto perEmpty = [glyphCacheState] (const SkGlyph& glyph, SkPoint mappedPt) { |
| glyphCacheState->addGlyph(glyph.getPackedID(), false); |
| }; |
| |
| auto perGlyph = [glyphCacheState] (const SkGlyph& glyph, SkPoint mappedPt) { |
| glyphCacheState->addGlyph(glyph.getPackedID(), false); |
| }; |
| |
| // Glyphs which are too large for the atlas still request images when computing the bounds |
| // for the glyph, which is why its necessary to send both. See related code in |
| // get_packed_glyph_bounds in GrGlyphCache.cpp and crbug.com/510931. |
| auto perPath = [glyphCacheState] (const SkGlyph& glyph, SkPoint mappedPt) { |
| glyphCacheState->addGlyph(glyph.getPackedID(), true); |
| glyphCacheState->addGlyph(glyph.getPackedID(), false); |
| }; |
| |
| fPainter.drawGlyphRunAsBMPWithPathFallback( |
| glyphCacheState, glyphRun, origin, runMatrix, |
| std::move(perEmpty), std::move(perGlyph), std::move(perPath)); |
| } |
| |
| struct ARGBHelper { |
| void operator () (const SkPaint& fallbackPaint, SkSpan<const SkGlyphID> glyphIDs, |
| SkSpan<const SkPoint> positions, SkScalar textScale, |
| const SkMatrix& glyphCacheMatrix, |
| SkGlyphRunListPainter::NeedsTransform needsTransform) { |
| TRACE_EVENT0("skia", "argbFallback"); |
| |
| SkScalerContextEffects effects; |
| auto* fallbackCache = |
| fStrikeServer->getOrCreateCache( |
| fallbackPaint, fSurfaceProps, fFallbackMatrix, |
| SkScalerContextFlags::kFakeGammaAndBoostContrast, &effects); |
| |
| for (auto glyphID : glyphIDs) { |
| fallbackCache->addGlyph(SkPackedGlyphID(glyphID, 0, 0), false); |
| } |
| } |
| |
| const SkMatrix& fFallbackMatrix; |
| const SkSurfaceProps& fSurfaceProps; |
| SkStrikeServer* const fStrikeServer; |
| }; |
| |
| void SkTextBlobCacheDiffCanvas::TrackLayerDevice::processGlyphRunForPaths( |
| const SkGlyphRun& glyphRun, const SkMatrix& runMatrix, |
| SkPoint origin, const SkPaint& runPaint) { |
| TRACE_EVENT0("skia", "SkTextBlobCacheDiffCanvas::processGlyphRunForPaths"); |
| SkPaint pathPaint{runPaint}; |
| |
| SkScalar textScale = pathPaint.setupForAsPaths(); |
| |
| SkScalerContextEffects effects; |
| auto* glyphCacheState = fStrikeServer->getOrCreateCache( |
| pathPaint, this->surfaceProps(), SkMatrix::I(), |
| SkScalerContextFlags::kFakeGammaAndBoostContrast, &effects); |
| |
| auto perEmpty = [glyphCacheState] (const SkGlyph& glyph, SkPoint mappedPt) { |
| glyphCacheState->addGlyph(glyph.getPackedID(), false); |
| }; |
| |
| auto perPath = [glyphCacheState](const SkGlyph& glyph, SkPoint position) { |
| const bool asPath = true; |
| glyphCacheState->addGlyph(glyph.getGlyphID(), asPath); |
| }; |
| |
| ARGBHelper argbFallback{runMatrix, surfaceProps(), fStrikeServer}; |
| |
| fPainter.drawGlyphRunAsPathWithARGBFallback( |
| glyphCacheState, glyphRun, origin, runPaint, runMatrix, textScale, |
| std::move(perEmpty), std::move(perPath), std::move(argbFallback)); |
| } |
| |
| #if SK_SUPPORT_GPU |
| bool SkTextBlobCacheDiffCanvas::TrackLayerDevice::maybeProcessGlyphRunForDFT( |
| const SkGlyphRun& glyphRun, const SkMatrix& runMatrix, |
| SkPoint origin, const SkPaint& runPaint) { |
| TRACE_EVENT0("skia", "SkTextBlobCacheDiffCanvas::maybeProcessGlyphRunForDFT"); |
| |
| GrTextContext::Options options; |
| options.fMinDistanceFieldFontSize = fSettings.fMinDistanceFieldFontSize; |
| options.fMaxDistanceFieldFontSize = fSettings.fMaxDistanceFieldFontSize; |
| GrTextContext::SanitizeOptions(&options); |
| if (!GrTextContext::CanDrawAsDistanceFields(runPaint, SkFont::LEGACY_ExtractFromPaint(runPaint), |
| runMatrix, this->surfaceProps(), |
| fSettings.fContextSupportsDistanceFieldText, |
| options)) { |
| return false; |
| } |
| |
| SkScalar textRatio; |
| SkPaint dfPaint(runPaint); |
| SkScalerContextFlags flags; |
| GrTextContext::InitDistanceFieldPaint(nullptr, &dfPaint, runMatrix, options, &textRatio, |
| &flags); |
| SkScalerContextEffects effects; |
| auto* sdfCache = fStrikeServer->getOrCreateCache(dfPaint, this->surfaceProps(), |
| SkMatrix::I(), flags, &effects); |
| |
| ARGBHelper argbFallback{runMatrix, surfaceProps(), fStrikeServer}; |
| |
| auto perEmpty = [sdfCache] (const SkGlyph& glyph, SkPoint mappedPt) { |
| sdfCache->addGlyph(glyph.getPackedID(), false); |
| }; |
| |
| auto perSDF = [sdfCache] (const SkGlyph& glyph, SkPoint position) { |
| const bool asPath = false; |
| sdfCache->addGlyph(glyph.getGlyphID(), asPath); |
| }; |
| |
| auto perPath = [sdfCache] (const SkGlyph& glyph, SkPoint position) { |
| const bool asPath = true; |
| sdfCache->addGlyph(glyph.getGlyphID(), asPath); |
| }; |
| |
| fPainter.drawGlyphRunAsSDFWithARGBFallback( |
| sdfCache, glyphRun, origin, runPaint, runMatrix, textRatio, |
| std::move(perEmpty), std::move(perSDF), std::move(perPath), |
| std::move(argbFallback)); |
| |
| return true; |
| } |
| #endif |
