| /* |
| * 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 "SkGlyphRun.h" |
| |
| #include <algorithm> |
| #include <new> |
| #include <tuple> |
| |
| #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 "SkFindAndPlaceGlyph.h" |
| #include "SkGlyphCache.h" |
| #include "SkMSAN.h" |
| #include "SkMakeUnique.h" |
| #include "SkMatrix.h" |
| #include "SkPaint.h" |
| #include "SkPaintPriv.h" |
| #include "SkPathEffect.h" |
| #include "SkRasterClip.h" |
| #include "SkStrikeCache.h" |
| #include "SkTextBlob.h" |
| #include "SkTextBlobPriv.h" |
| #include "SkTo.h" |
| #include "SkUtils.h" |
| |
| namespace { |
| static SkTypeface::Encoding convert_encoding(SkPaint::TextEncoding encoding) { |
| switch (encoding) { |
| case SkPaint::kUTF8_TextEncoding: return SkTypeface::kUTF8_Encoding; |
| case SkPaint::kUTF16_TextEncoding: return SkTypeface::kUTF16_Encoding; |
| case SkPaint::kUTF32_TextEncoding: return SkTypeface::kUTF32_Encoding; |
| default: return SkTypeface::kUTF32_Encoding; |
| } |
| } |
| } // namespace |
| |
| // -- SkGlyphRun ----------------------------------------------------------------------------------- |
| SkGlyphRun::SkGlyphRun(SkPaint&& runPaint, |
| SkSpan<const uint16_t> denseIndices, |
| SkSpan<const SkPoint> positions, |
| SkSpan<const SkGlyphID> glyphIDs, |
| SkSpan<const SkGlyphID> uniqueGlyphIDs, |
| SkSpan<const char> text, |
| SkSpan<const uint32_t> clusters) |
| : fUniqueGlyphIDIndices{denseIndices} |
| , fPositions{positions} |
| , fGlyphIDs{glyphIDs} |
| , fUniqueGlyphIDs{uniqueGlyphIDs} |
| , fText{text} |
| , fClusters{clusters} |
| , fRunPaint{std::move(runPaint)} {} |
| |
| void SkGlyphRun::eachGlyphToGlyphRun(SkGlyphRun::PerGlyph perGlyph) { |
| SkPaint paint{fRunPaint}; |
| SkPoint point; |
| SkGlyphID glyphID; |
| SkGlyphRun run{ |
| std::move(paint), |
| SkSpan<const uint16_t>{}, // No dense indices for now. |
| SkSpan<const SkPoint>{&point, 1}, |
| SkSpan<const SkGlyphID>{&glyphID, 1}, |
| SkSpan<const SkGlyphID>{}, |
| SkSpan<const char>{}, |
| SkSpan<const uint32_t>{} |
| }; |
| |
| auto runSize = fGlyphIDs.size(); |
| auto runPaint = run.mutablePaint(); |
| for (size_t i = 0; i < runSize; i++) { |
| glyphID = fGlyphIDs[i]; |
| point = fPositions[i]; |
| perGlyph(&run, runPaint); |
| } |
| } |
| |
| void SkGlyphRun::temporaryShuntToDrawPosText(SkBaseDevice* device, SkPoint origin) { |
| |
| auto pos = (const SkScalar*) this->positions().data(); |
| |
| if (!fGlyphIDs.empty()) { |
| device->drawPosText( |
| fGlyphIDs.data(), fGlyphIDs.size() * sizeof(SkGlyphID), |
| pos, 2, origin, fRunPaint); |
| } |
| } |
| |
| void SkGlyphRun::temporaryShuntToCallback(TemporaryShuntCallback callback) { |
| auto bytes = (const char *)fGlyphIDs.data(); |
| auto pos = (const SkScalar*) this->positions().data(); |
| callback(fGlyphIDs.size(), bytes, pos); |
| } |
| |
| void SkGlyphRun::filloutGlyphsAndPositions(SkGlyphID* glyphIDs, SkPoint* positions) { |
| memcpy(glyphIDs, fGlyphIDs.data(), fGlyphIDs.size_bytes()); |
| memcpy(positions, fPositions.data(), fPositions.size_bytes()); |
| } |
| |
| // -- SkGlyphRunListDrawer ------------------------------------------------------------------------- |
| SkGlyphRunListDrawer::SkGlyphRunListDrawer( |
| 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; |
| } |
| } |
| |
| SkGlyphRunListDrawer::SkGlyphRunListDrawer( |
| const SkSurfaceProps& props, const GrColorSpaceInfo& csi) |
| : SkGlyphRunListDrawer(props, kUnknown_SkColorType, compute_scaler_context_flags(csi)) {} |
| |
| SkGlyphRunListDrawer::SkGlyphRunListDrawer(const GrRenderTargetContext& rtc) |
| : SkGlyphRunListDrawer{rtc.surfaceProps(), rtc.colorSpaceInfo()} {} |
| |
| // TODO: all this logic should move to the glyph cache. |
| static const SkGlyph& lookup_glyph_by_subpixel( |
| SkAxisAlignment axisAlignment, SkPoint position, SkGlyphID glyphID, SkGlyphCache* cache) { |
| 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 cache->getGlyphIDMetrics(glyphID, lookupX, lookupY); |
| } |
| |
| |
| // forEachMappedDrawableGlyph handles positioning for mask type glyph handling for both sub-pixel |
| // and full pixel positioning. |
| template <typename EachGlyph> |
| void SkGlyphRunListDrawer::forEachMappedDrawableGlyph( |
| const SkGlyphRun& glyphRun, SkPoint origin, const SkMatrix& deviceMatrix, |
| SkGlyphCache* cache, EachGlyph eachGlyph) { |
| bool isSubpixel = cache->isSubpixel(); |
| |
| SkAxisAlignment axisAlignment = kNone_SkAxisAlignment; |
| SkMatrix mapping = deviceMatrix; |
| mapping.preTranslate(origin.x(), origin.y()); |
| // TODO: all this logic should move to the glyph cache. |
| if (isSubpixel) { |
| axisAlignment = cache->getScalerContext()->computeAxisAlignmentForHText(); |
| SkPoint rounding = SkFindAndPlaceGlyph::SubpixelPositionRounding(axisAlignment); |
| mapping.postTranslate(rounding.x(), rounding.y()); |
| } else { |
| mapping.postTranslate(SK_ScalarHalf, SK_ScalarHalf); |
| } |
| |
| auto runSize = glyphRun.runSize(); |
| if (this->ensureBitmapBuffers(runSize)) { |
| mapping.mapPoints(fPositions, glyphRun.positions().data(), runSize); |
| const SkPoint* mappedPtCursor = fPositions; |
| const SkPoint* ptCursor = glyphRun.positions().data(); |
| for (auto glyphID : glyphRun.shuntGlyphsIDs()) { |
| auto mappedPt = *mappedPtCursor++; |
| auto pt = origin + *ptCursor++; |
| if (SkScalarsAreFinite(mappedPt.x(), mappedPt.y())) { |
| // TODO: all this logic should move to the glyph cache. |
| const SkGlyph& glyph = |
| isSubpixel ? lookup_glyph_by_subpixel(axisAlignment, mappedPt, glyphID, cache) |
| : cache->getGlyphIDMetrics(glyphID); |
| if (!glyph.isEmpty()) { |
| // 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 le = [](float a, int b) { return a <= (float)b; }; |
| auto ge = [](float a, int b) { return a >= (float)b; }; |
| if (le(mappedPt.fX, INT_MAX - (INT16_MAX + SkTo<int>(UINT16_MAX))) && |
| ge(mappedPt.fX, INT_MIN - (INT16_MIN + 0 /*UINT16_MIN*/)) && |
| le(mappedPt.fY, INT_MAX - (INT16_MAX + SkTo<int>(UINT16_MAX))) && |
| ge(mappedPt.fY, INT_MIN - (INT16_MIN + 0 /*UINT16_MIN*/))) |
| { |
| eachGlyph(glyph, pt, mappedPt); |
| } |
| } |
| } |
| } |
| } |
| } |
| |
| #endif |
| |
| bool SkGlyphRunListDrawer::ShouldDrawAsPath(const SkPaint& paint, 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; |
| } |
| |
| SkMatrix textM; |
| SkPaintPriv::MakeTextMatrix(&textM, paint); |
| return SkPaint::TooBigToUseCache(matrix, textM, 1024); |
| } |
| |
| bool SkGlyphRunListDrawer::ensureBitmapBuffers(size_t runSize) { |
| if (runSize > fMaxRunSize) { |
| fPositions.reset(runSize); |
| fMaxRunSize = runSize; |
| } |
| |
| return true; |
| } |
| |
| void SkGlyphRunListDrawer::drawUsingPaths( |
| const SkGlyphRun& glyphRun, SkPoint origin, SkGlyphCache* cache, PerPath perPath) const { |
| |
| auto eachGlyph = |
| [perPath{std::move(perPath)}, origin, &cache] |
| (SkGlyphID glyphID, SkPoint position) { |
| const SkGlyph& glyph = cache->getGlyphIDMetrics(glyphID); |
| if (glyph.fWidth > 0) { |
| const SkPath* path = cache->findPath(glyph); |
| SkPoint loc = position + origin; |
| perPath(path, glyph, loc); |
| } |
| }; |
| |
| glyphRun.forEachGlyphAndPosition(eachGlyph); |
| } |
| |
| static bool prepare_mask( |
| SkGlyphCache* cache, const SkGlyph& glyph, SkPoint position, SkMask* mask) { |
| if (glyph.fWidth == 0) { return false; } |
| |
| // 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); }; |
| if (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*/))) { |
| return false; |
| } |
| |
| 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()); |
| |
| uint8_t* bits = (uint8_t*)(cache->findImage(glyph)); |
| if (nullptr == bits) { |
| return false; // can't rasterize glyph |
| } |
| |
| mask->fImage = bits; |
| mask->fRowBytes = glyph.rowBytes(); |
| mask->fFormat = static_cast<SkMask::Format>(glyph.fMaskFormat); |
| |
| return true; |
| } |
| |
| void SkGlyphRunListDrawer::drawGlyphRunAsSubpixelMask( |
| SkGlyphCache* cache, const SkGlyphRun& glyphRun, |
| SkPoint origin, const SkMatrix& deviceMatrix, |
| PerMask perMask) { |
| auto runSize = glyphRun.runSize(); |
| if (this->ensureBitmapBuffers(runSize)) { |
| // Add rounding and origin. |
| SkMatrix matrix = deviceMatrix; |
| SkAxisAlignment axisAlignment = cache->getScalerContext()->computeAxisAlignmentForHText(); |
| SkPoint rounding = SkFindAndPlaceGlyph::SubpixelPositionRounding(axisAlignment); |
| matrix.preTranslate(origin.x(), origin.y()); |
| matrix.postTranslate(rounding.x(), rounding.y()); |
| matrix.mapPoints(fPositions, glyphRun.positions().data(), runSize); |
| |
| const SkPoint* positionCursor = fPositions; |
| for (auto glyphID : glyphRun.shuntGlyphsIDs()) { |
| auto position = *positionCursor++; |
| if (SkScalarsAreFinite(position.fX, position.fY)) { |
| SkFixed lookupX = SkScalarToFixed(SkScalarFraction(position.fX)), |
| lookupY = SkScalarToFixed(SkScalarFraction(position.fY)); |
| |
| // Snap to a given axis if alignment is requested. |
| if (axisAlignment == kX_SkAxisAlignment ) { |
| lookupY = 0; |
| } else if (axisAlignment == kY_SkAxisAlignment) { |
| lookupX = 0; |
| } |
| |
| const SkGlyph& glyph = cache->getGlyphIDMetrics(glyphID, lookupX, lookupY); |
| SkMask mask; |
| if (prepare_mask(cache, glyph, position, &mask)) { |
| perMask(mask, glyph, position); |
| } |
| } |
| } |
| } |
| } |
| |
| void SkGlyphRunListDrawer::drawGlyphRunAsFullpixelMask( |
| SkGlyphCache* cache, const SkGlyphRun& glyphRun, |
| SkPoint origin, const SkMatrix& deviceMatrix, |
| PerMask perMask) { |
| auto runSize = glyphRun.runSize(); |
| if (this->ensureBitmapBuffers(runSize)) { |
| |
| // Add rounding and origin. |
| SkMatrix matrix = deviceMatrix; |
| matrix.preTranslate(origin.x(), origin.y()); |
| matrix.postTranslate(SK_ScalarHalf, SK_ScalarHalf); |
| matrix.mapPoints(fPositions, glyphRun.positions().data(), runSize); |
| |
| const SkPoint* positionCursor = fPositions; |
| for (auto glyphID : glyphRun.shuntGlyphsIDs()) { |
| auto position = *positionCursor++; |
| if (SkScalarsAreFinite(position.fX, position.fY)) { |
| const SkGlyph& glyph = cache->getGlyphIDMetrics(glyphID); |
| SkMask mask; |
| if (prepare_mask(cache, glyph, position, &mask)) { |
| perMask(mask, glyph, position); |
| } |
| } |
| } |
| } |
| } |
| |
| |
| void SkGlyphRunListDrawer::drawForBitmapDevice( |
| const SkGlyphRunList& glyphRunList, const SkMatrix& deviceMatrix, |
| PerMaskCreator perMaskCreator, PerPathCreator perPathCreator) { |
| |
| SkPoint origin = glyphRunList.origin(); |
| for (auto& glyphRun : glyphRunList) { |
| SkSTArenaAlloc<3332> alloc; |
| // 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 && glyphRun.paint().isSrcOver()) |
| ? fDeviceProps |
| : fBitmapFallbackProps; |
| auto paint = glyphRun.paint(); |
| if (ShouldDrawAsPath(glyphRun.paint(), deviceMatrix)) { |
| |
| // setup our std pathPaint, in hopes of getting hits in the cache |
| SkPaint pathPaint(glyphRun.paint()); |
| SkScalar matrixScale = pathPaint.setupForAsPaths(); |
| |
| // Temporarily jam in kFill, so we only ever ask for the raw outline from the cache. |
| pathPaint.setStyle(SkPaint::kFill_Style); |
| pathPaint.setPathEffect(nullptr); |
| |
| auto pathCache = SkStrikeCache::FindOrCreateStrikeExclusive( |
| pathPaint, &props, fScalerContextFlags, nullptr); |
| |
| auto perPath = perPathCreator(paint, matrixScale, &alloc); |
| this->drawUsingPaths(glyphRun, origin, pathCache.get(), perPath); |
| } else { |
| auto cache = SkStrikeCache::FindOrCreateStrikeExclusive( |
| paint, &props, fScalerContextFlags, &deviceMatrix); |
| auto perMask = perMaskCreator(paint, &alloc); |
| this->drawUsingMasks(cache.get(), glyphRun, origin, deviceMatrix, perMask); |
| } |
| } |
| } |
| |
| void SkGlyphRunListDrawer::drawUsingMasks( |
| SkGlyphCache* cache, const SkGlyphRun& glyphRun, |
| SkPoint origin, const SkMatrix& deviceMatrix, PerMask perMask) { |
| if (cache->isSubpixel()) { |
| this->drawGlyphRunAsSubpixelMask(cache, glyphRun, origin, deviceMatrix, perMask); |
| } else { |
| this->drawGlyphRunAsFullpixelMask(cache, glyphRun, origin, deviceMatrix, perMask); |
| } |
| } |
| |
| // -- SkGlyphRunList ------------------------------------------------------------------------------- |
| SkGlyphRunList::SkGlyphRunList() = default; |
| SkGlyphRunList::SkGlyphRunList( |
| const SkPaint& paint, |
| const SkTextBlob* blob, |
| SkPoint origin, |
| SkSpan<SkGlyphRun> glyphRunList) |
| : fOriginalPaint{&paint} |
| , fOriginalTextBlob{blob} |
| , fOrigin{origin} |
| , fGlyphRuns{glyphRunList} { } |
| |
| SkGlyphRunList::SkGlyphRunList(SkGlyphRun* glyphRun) |
| : fOriginalPaint{&glyphRun->paint()} |
| , fOriginalTextBlob{nullptr} |
| , fOrigin{SkPoint::Make(0, 0)} |
| , fGlyphRuns{SkSpan<SkGlyphRun>{glyphRun, 1}} {} |
| |
| uint64_t SkGlyphRunList::uniqueID() const { |
| return fOriginalTextBlob != nullptr ? fOriginalTextBlob->uniqueID() |
| : SK_InvalidUniqueID; |
| } |
| |
| bool SkGlyphRunList::anyRunsLCD() const { |
| for (const auto& r : fGlyphRuns) { |
| if (r.paint().isLCDRenderText()) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| void SkGlyphRunList::temporaryShuntBlobNotifyAddedToCache(uint32_t cacheID) const { |
| SkASSERT(fOriginalTextBlob != nullptr); |
| fOriginalTextBlob->notifyAddedToCache(cacheID); |
| } |
| |
| // -- SkGlyphRunListIterator ----------------------------------------------------------------------- |
| constexpr SkPoint SkGlyphRunListIterator::fZero; |
| |
| // -- SkGlyphIDSet --------------------------------------------------------------------------------- |
| // A faster set implementation that does not need any initialization, and reading the set items |
| // is order the number of items, and not the size of the universe. |
| // This implementation is based on the paper by Briggs and Torczon, "An Efficient Representation |
| // for Sparse Sets" |
| // |
| // This implementation assumes that the unique glyphs added are appended to a vector that may |
| // already have unique glyph from a previous computation. This allows the packing of multiple |
| // UniqueID sequences in a single vector. |
| SkSpan<const SkGlyphID> SkGlyphIDSet::uniquifyGlyphIDs( |
| uint32_t universeSize, |
| SkSpan<const SkGlyphID> glyphIDs, |
| SkGlyphID* uniqueGlyphIDs, |
| uint16_t* denseIndices) { |
| static constexpr SkGlyphID kUndefGlyph{0}; |
| |
| if (universeSize > fUniverseToUniqueSize) { |
| fUniverseToUnique.reset(universeSize); |
| fUniverseToUniqueSize = universeSize; |
| // If the following bzero becomes a performance problem, the memory can be marked as |
| // initialized for valgrind and msan. |
| // valgrind = VALGRIND_MAKE_MEM_DEFINED(fUniverseToUnique, universeSize * sizeof(SkGlyphID)) |
| // msan = sk_msan_mark_initialized(fUniverseToUnique, universeSize * sizeof(SkGlyphID)) |
| sk_bzero(fUniverseToUnique, universeSize * sizeof(SkGlyphID)); |
| } |
| |
| // No need to clear fUniverseToUnique here... the set insertion algorithm is designed to work |
| // correctly even when the fUniverseToUnique buffer is uninitialized! |
| |
| size_t uniqueSize = 0; |
| size_t denseIndicesCursor = 0; |
| for (auto glyphID : glyphIDs) { |
| |
| // If the glyphID is not in range then it is the undefined glyph. |
| if (glyphID >= universeSize) { |
| glyphID = kUndefGlyph; |
| } |
| |
| // The index into the unique ID vector. |
| auto uniqueIndex = fUniverseToUnique[glyphID]; |
| |
| if (uniqueIndex >= uniqueSize || uniqueGlyphIDs[uniqueIndex] != glyphID) { |
| uniqueIndex = SkTo<uint16_t>(uniqueSize); |
| uniqueGlyphIDs[uniqueSize] = glyphID; |
| fUniverseToUnique[glyphID] = uniqueIndex; |
| uniqueSize += 1; |
| } |
| |
| denseIndices[denseIndicesCursor++] = uniqueIndex; |
| } |
| |
| // If we're hanging onto these arrays for a long time, we don't want their size to drift |
| // endlessly upwards. It's unusual to see a typeface with more than 4096 possible glyphs. |
| if (fUniverseToUniqueSize > 4096) { |
| fUniverseToUnique.reset(4096); |
| sk_bzero(fUniverseToUnique, 4096 * sizeof(SkGlyphID)); |
| fUniverseToUniqueSize = 4096; |
| } |
| |
| return SkSpan<const SkGlyphID>(uniqueGlyphIDs, uniqueSize); |
| } |
| |
| // -- SkGlyphRunBuilder ---------------------------------------------------------------------------- |
| void SkGlyphRunBuilder::drawTextAtOrigin( |
| const SkPaint& paint, const void* bytes, size_t byteLength) { |
| auto glyphIDs = textToGlyphIDs(paint, bytes, byteLength); |
| if (!glyphIDs.empty()) { |
| this->initialize(glyphIDs.size()); |
| } |
| |
| auto positions = SkSpan<const SkPoint>{fPositions, glyphIDs.size()}; |
| |
| // Every glyph is at the origin. |
| sk_bzero((void *)positions.data(), positions.size_bytes()); |
| |
| this->makeGlyphRun( |
| paint, |
| glyphIDs, |
| positions, |
| SkSpan<const uint16_t>{}, // no dense indices for now., |
| SkSpan<const SkGlyphID>{}, |
| SkSpan<const char>{}, |
| SkSpan<const uint32_t>{}); |
| this->makeGlyphRunList(paint, nullptr, SkPoint::Make(0, 0)); |
| } |
| |
| void SkGlyphRunBuilder::drawText( |
| const SkPaint& paint, const void* bytes, size_t byteLength, SkPoint origin) { |
| auto glyphIDs = textToGlyphIDs(paint, bytes, byteLength); |
| if (!glyphIDs.empty()) { |
| this->initialize(glyphIDs.size()); |
| this->simplifyDrawText( |
| paint, glyphIDs, origin, fUniqueGlyphIDIndices, fUniqueGlyphIDs, fPositions); |
| } |
| |
| this->makeGlyphRunList(paint, nullptr, SkPoint::Make(0, 0)); |
| } |
| |
| void SkGlyphRunBuilder::drawPosTextH(const SkPaint& paint, const void* bytes, |
| size_t byteLength, const SkScalar* xpos, |
| SkScalar constY) { |
| auto glyphIDs = textToGlyphIDs(paint, bytes, byteLength); |
| if (!glyphIDs.empty()) { |
| this->initialize(glyphIDs.size()); |
| this->simplifyDrawPosTextH( |
| paint, glyphIDs, xpos, constY, fUniqueGlyphIDIndices, fUniqueGlyphIDs, fPositions); |
| } |
| |
| this->makeGlyphRunList(paint, nullptr, SkPoint::Make(0, 0)); |
| } |
| |
| void SkGlyphRunBuilder::drawPosText(const SkPaint& paint, const void* bytes, |
| size_t byteLength, const SkPoint* pos) { |
| auto glyphIDs = textToGlyphIDs(paint, bytes, byteLength); |
| if (!glyphIDs.empty()) { |
| this->initialize(glyphIDs.size()); |
| this->simplifyDrawPosText(paint, glyphIDs, pos, |
| fUniqueGlyphIDIndices, fUniqueGlyphIDs); |
| } |
| |
| this->makeGlyphRunList(paint, nullptr, SkPoint::Make(0, 0)); |
| } |
| |
| void SkGlyphRunBuilder::drawTextBlob(const SkPaint& paint, const SkTextBlob& blob, SkPoint origin) { |
| SkPaint runPaint = paint; |
| |
| // Figure out all the storage needed to pre-size everything below. |
| size_t totalGlyphs = 0; |
| for (SkTextBlobRunIterator it(&blob); !it.done(); it.next()) { |
| totalGlyphs += it.glyphCount(); |
| } |
| |
| // Pre-size all the buffers so they don't move during processing. |
| this->initialize(totalGlyphs); |
| |
| uint16_t* currentDenseIndices = fUniqueGlyphIDIndices; |
| SkPoint* currentPositions = fPositions; |
| SkGlyphID* currentUniqueGlyphIDs = fUniqueGlyphIDs; |
| |
| for (SkTextBlobRunIterator it(&blob); !it.done(); it.next()) { |
| // applyFontToPaint() always overwrites the exact same attributes, |
| // so it is safe to not re-seed the paint for this reason. |
| it.applyFontToPaint(&runPaint); |
| size_t runSize = it.glyphCount(); |
| |
| // These better be glyphs |
| SkASSERT(runPaint.getTextEncoding() == SkPaint::kGlyphID_TextEncoding); |
| |
| auto text = SkSpan<const char>(it.text(), it.textSize()); |
| auto clusters = SkSpan<const uint32_t>(it.clusters(), runSize); |
| const SkPoint& offset = it.offset(); |
| auto glyphIDs = SkSpan<const SkGlyphID>{it.glyphs(), runSize}; |
| |
| size_t uniqueGlyphIDsSize = 0; |
| switch (it.positioning()) { |
| case SkTextBlobRunIterator::kDefault_Positioning: { |
| uniqueGlyphIDsSize = this->simplifyDrawText( |
| runPaint, glyphIDs, offset, |
| currentDenseIndices, currentUniqueGlyphIDs, currentPositions, |
| text, clusters); |
| } |
| break; |
| case SkTextBlobRunIterator::kHorizontal_Positioning: { |
| auto constY = offset.y(); |
| uniqueGlyphIDsSize = this->simplifyDrawPosTextH( |
| runPaint, glyphIDs, it.pos(), constY, |
| currentDenseIndices, currentUniqueGlyphIDs, currentPositions, |
| text, clusters); |
| } |
| break; |
| case SkTextBlobRunIterator::kFull_Positioning: |
| uniqueGlyphIDsSize = this->simplifyDrawPosText( |
| runPaint, glyphIDs, (const SkPoint*)it.pos(), |
| currentDenseIndices, currentUniqueGlyphIDs, |
| text, clusters); |
| break; |
| } |
| |
| currentDenseIndices += runSize; |
| currentPositions += runSize; |
| currentUniqueGlyphIDs += uniqueGlyphIDsSize; |
| } |
| |
| this->makeGlyphRunList(paint, &blob, origin); |
| } |
| |
| void SkGlyphRunBuilder::drawGlyphPos( |
| const SkPaint& paint, SkSpan<const SkGlyphID> glyphIDs, const SkPoint* pos) { |
| if (!glyphIDs.empty()) { |
| this->initialize(glyphIDs.size()); |
| this->simplifyDrawPosText(paint, glyphIDs, pos, |
| fUniqueGlyphIDIndices, fUniqueGlyphIDs); |
| this->makeGlyphRunList(paint, nullptr, SkPoint::Make(0, 0)); |
| } |
| } |
| |
| const SkGlyphRunList& SkGlyphRunBuilder::useGlyphRunList() { |
| return fGlyphRunList; |
| } |
| |
| void SkGlyphRunBuilder::initialize(size_t totalRunSize) { |
| |
| if (totalRunSize > fMaxTotalRunSize) { |
| fMaxTotalRunSize = totalRunSize; |
| fUniqueGlyphIDIndices.reset(fMaxTotalRunSize); |
| fPositions.reset(fMaxTotalRunSize); |
| fUniqueGlyphIDs.reset(fMaxTotalRunSize); |
| } |
| |
| fGlyphRunListStorage.clear(); |
| } |
| |
| SkSpan<const SkGlyphID> SkGlyphRunBuilder::textToGlyphIDs( |
| const SkPaint& paint, const void* bytes, size_t byteLength) { |
| auto encoding = paint.getTextEncoding(); |
| if (encoding != SkPaint::kGlyphID_TextEncoding) { |
| auto tfEncoding = convert_encoding(encoding); |
| int utfSize = SkUTFN_CountUnichars(tfEncoding, bytes, byteLength); |
| if (utfSize > 0) { |
| size_t runSize = SkTo<size_t>(utfSize); |
| fScratchGlyphIDs.resize(runSize); |
| auto typeface = SkPaintPriv::GetTypefaceOrDefault(paint); |
| typeface->charsToGlyphs(bytes, tfEncoding, fScratchGlyphIDs.data(), runSize); |
| return SkSpan<const SkGlyphID>{fScratchGlyphIDs}; |
| } else { |
| return SkSpan<const SkGlyphID>(); |
| } |
| } else { |
| return SkSpan<const SkGlyphID>((const SkGlyphID*)bytes, byteLength / 2); |
| } |
| } |
| |
| SkSpan<const SkGlyphID> SkGlyphRunBuilder::addDenseAndUnique( |
| const SkPaint& paint, |
| SkSpan<const SkGlyphID> glyphIDs, |
| uint16_t* uniqueGlyphIDIndices, |
| SkGlyphID* uniqueGlyphIDs) { |
| SkSpan<const SkGlyphID> uniquifiedGlyphIDs; |
| if (!glyphIDs.empty()) { |
| auto typeface = SkPaintPriv::GetTypefaceOrDefault(paint); |
| auto glyphUniverseSize = typeface->countGlyphs(); |
| |
| // There better be glyphs in the font if we want to uniqify. |
| if (glyphUniverseSize > 0) { |
| uniquifiedGlyphIDs = fGlyphIDSet.uniquifyGlyphIDs( |
| glyphUniverseSize, glyphIDs, uniqueGlyphIDs, uniqueGlyphIDIndices); |
| } |
| } |
| |
| return uniquifiedGlyphIDs; |
| } |
| |
| void SkGlyphRunBuilder::makeGlyphRun( |
| const SkPaint& runPaint, |
| SkSpan<const SkGlyphID> glyphIDs, |
| SkSpan<const SkPoint> positions, |
| SkSpan<const uint16_t> uniqueGlyphIDIndices, |
| SkSpan<const SkGlyphID> uniqueGlyphIDs, |
| SkSpan<const char> text, |
| SkSpan<const uint32_t> clusters) { |
| |
| // Ignore empty runs. |
| if (!glyphIDs.empty()) { |
| SkPaint glyphRunPaint{runPaint}; |
| glyphRunPaint.setTextEncoding(SkPaint::kGlyphID_TextEncoding); |
| glyphRunPaint.setTextAlign(SkPaint::kLeft_Align); |
| |
| fGlyphRunListStorage.emplace_back( |
| std::move(glyphRunPaint), |
| uniqueGlyphIDIndices, |
| positions, |
| glyphIDs, |
| uniqueGlyphIDs, |
| text, |
| clusters); |
| } |
| } |
| |
| void SkGlyphRunBuilder::makeGlyphRunList( |
| const SkPaint& paint, const SkTextBlob* blob, SkPoint origin) { |
| |
| fGlyphRunList.~SkGlyphRunList(); |
| new (&fGlyphRunList) SkGlyphRunList{ |
| paint, blob, origin, SkSpan<SkGlyphRun>{fGlyphRunListStorage}}; |
| } |
| |
| size_t SkGlyphRunBuilder::simplifyDrawText( |
| const SkPaint& paint, SkSpan<const SkGlyphID> glyphIDs, SkPoint origin, |
| uint16_t* uniqueGlyphIDIndicesBuffer, SkGlyphID* uniqueGlyphIDsBuffer, SkPoint* positions, |
| SkSpan<const char> text, SkSpan<const uint32_t> clusters) { |
| SkASSERT(!glyphIDs.empty()); |
| |
| auto runSize = glyphIDs.size(); |
| |
| auto unqiueGlyphIDs = this->addDenseAndUnique( |
| paint, glyphIDs, uniqueGlyphIDIndicesBuffer, uniqueGlyphIDsBuffer); |
| |
| if (!unqiueGlyphIDs.empty()) { |
| fScratchAdvances.resize(runSize); |
| { |
| auto cache = SkStrikeCache::FindOrCreateStrikeExclusive(paint); |
| cache->getAdvances(unqiueGlyphIDs, fScratchAdvances.data()); |
| } |
| |
| SkPoint endOfLastGlyph = origin; |
| |
| for (size_t i = 0; i < runSize; i++) { |
| positions[i] = endOfLastGlyph; |
| endOfLastGlyph += fScratchAdvances[uniqueGlyphIDIndicesBuffer[i]]; |
| } |
| |
| if (paint.getTextAlign() != SkPaint::kLeft_Align) { |
| SkVector len = endOfLastGlyph - origin; |
| if (paint.getTextAlign() == SkPaint::kCenter_Align) { |
| len.scale(SK_ScalarHalf); |
| } |
| for (auto& pt : SkSpan<SkPoint>{positions, runSize}) { |
| pt -= len; |
| } |
| |
| } |
| |
| this->makeGlyphRun( |
| paint, |
| glyphIDs, |
| SkSpan<const SkPoint>{positions, runSize}, |
| SkSpan<const uint16_t>{uniqueGlyphIDIndicesBuffer, runSize}, |
| unqiueGlyphIDs, |
| text, |
| clusters); |
| } |
| |
| return unqiueGlyphIDs.size(); |
| } |
| |
| size_t SkGlyphRunBuilder::simplifyDrawPosTextH( |
| const SkPaint& paint, SkSpan<const SkGlyphID> glyphIDs, |
| const SkScalar* xpos, SkScalar constY, |
| uint16_t* uniqueGlyphIDIndicesBuffer, SkGlyphID* uniqueGlyphIDsBuffer, SkPoint* positions, |
| SkSpan<const char> text, SkSpan<const uint32_t> clusters) { |
| |
| auto posCursor = positions; |
| for (auto x : SkSpan<const SkScalar>{xpos, glyphIDs.size()}) { |
| *posCursor++ = SkPoint::Make(x, constY); |
| } |
| |
| return simplifyDrawPosText(paint, glyphIDs, positions, |
| uniqueGlyphIDIndicesBuffer, uniqueGlyphIDsBuffer, |
| text, clusters); |
| } |
| |
| size_t SkGlyphRunBuilder::simplifyDrawPosText( |
| const SkPaint& paint, SkSpan<const SkGlyphID> glyphIDs, const SkPoint* pos, |
| uint16_t* uniqueGlyphIDIndicesBuffer, SkGlyphID* uniqueGlyphIDsBuffer, |
| SkSpan<const char> text, SkSpan<const uint32_t> clusters) { |
| auto runSize = glyphIDs.size(); |
| |
| // The dense indices are not used by the rest of the stack yet. |
| SkSpan<const SkGlyphID> uniqueGlyphIDs; |
| #ifdef SK_DEBUG |
| uniqueGlyphIDs = this->addDenseAndUnique( |
| paint, glyphIDs, uniqueGlyphIDIndicesBuffer, uniqueGlyphIDsBuffer); |
| #endif |
| |
| // TODO: when using the unique glyph system have a guard that there are actually glyphs like |
| // drawText above. |
| this->makeGlyphRun( |
| paint, |
| glyphIDs, |
| SkSpan<const SkPoint>{pos, runSize}, |
| SkSpan<const SkGlyphID>{uniqueGlyphIDIndicesBuffer, runSize}, |
| uniqueGlyphIDs, |
| text, |
| clusters); |
| return uniqueGlyphIDs.size(); |
| } |
| |
| #if SK_SUPPORT_GPU |
| |
| static bool glyph_too_big_for_atlas(const SkGlyph& glyph) { |
| return glyph.fWidth >= 256 || glyph.fHeight >= 256; |
| } |
| |
| template <typename PerGlyphT, typename PerPathT> |
| void SkGlyphRunListDrawer::drawGlyphRunAsBMPWithPathFallback( |
| SkGlyphCache* cache, const SkGlyphRun& glyphRun, |
| SkPoint origin, const SkMatrix& deviceMatrix, |
| PerGlyphT perGlyph, PerPathT perPath) { |
| auto eachGlyph = |
| [cache, perGlyph{std::move(perGlyph)}, perPath{std::move(perPath)}] |
| (const SkGlyph& glyph, SkPoint pt, SkPoint mappedPt) { |
| if (glyph_too_big_for_atlas(glyph)) { |
| const SkPath* glyphPath = cache->findPath(glyph); |
| if (glyphPath != nullptr) { |
| perPath(glyphPath, glyph, mappedPt); |
| } |
| } else { |
| const void* glyphImage = cache->findImage(glyph); |
| if (glyphImage != nullptr) { |
| perGlyph(glyph, mappedPt); |
| } |
| } |
| }; |
| |
| this->forEachMappedDrawableGlyph(glyphRun, origin, deviceMatrix, cache, eachGlyph); |
| } |
| |
| static SkRect rect_to_draw( |
| const SkGlyph& glyph, SkPoint origin, SkScalar textScale, GrGlyph::MaskStyle maskStyle) { |
| |
| SkScalar dx = SkIntToScalar(glyph.fLeft); |
| SkScalar dy = SkIntToScalar(glyph.fTop); |
| SkScalar width = SkIntToScalar(glyph.fWidth); |
| SkScalar height = SkIntToScalar(glyph.fHeight); |
| |
| if (maskStyle == GrGlyph::kDistance_MaskStyle) { |
| 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); |
| } |
| |
| template <typename PerSDFT, typename PerPathT, typename PerFallbackT> |
| void SkGlyphRunListDrawer::drawGlyphRunAsSDFWithFallback( |
| SkGlyphCache* cache, const SkGlyphRun& glyphRun, |
| SkPoint origin, SkScalar textRatio, |
| PerSDFT perSDF, PerPathT perPath, PerFallbackT perFallback) { |
| |
| const SkPoint* positionCursor = glyphRun.positions().data(); |
| for (auto glyphID : glyphRun.shuntGlyphsIDs()) { |
| const SkGlyph& glyph = cache->getGlyphIDMetrics(glyphID); |
| SkPoint glyphPos = origin + *positionCursor++; |
| if (glyph.fWidth > 0) { |
| if (glyph.fMaskFormat == SkMask::kSDF_Format) { |
| |
| if (glyph_too_big_for_atlas(glyph)) { |
| SkRect glyphRect = |
| rect_to_draw(glyph, glyphPos, textRatio, |
| GrGlyph::kDistance_MaskStyle); |
| if (!glyphRect.isEmpty()) { |
| const SkPath* glyphPath = cache->findPath(glyph); |
| if (glyphPath != nullptr) { |
| perPath(glyphPath, glyph, glyphPos); |
| } |
| } |
| } else { |
| perSDF(glyph, glyphPos); |
| } |
| |
| } else { |
| perFallback(glyph, glyphPos); |
| } |
| } |
| } |
| } |
| |
| GrColor generate_filtered_color(const SkPaint& paint, const GrColorSpaceInfo& colorSpaceInfo) { |
| GrColor4f filteredColor = SkColorToUnpremulGrColor4f(paint.getColor(), colorSpaceInfo); |
| if (paint.getColorFilter() != nullptr) { |
| filteredColor = GrColor4f::FromSkColor4f( |
| paint.getColorFilter()->filterColor4f(filteredColor.toSkColor4f(), |
| colorSpaceInfo.colorSpace())); |
| } |
| return filteredColor.premul().toGrColor(); |
| } |
| |
| 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(); |
| GrColor filteredColor = generate_filtered_color(listPaint, target->colorSpaceInfo()); |
| |
| // 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, 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); |
| this->regenerateGlyphRunList(cacheBlob.get(), glyphCache, |
| *context->contextPriv().caps()->shaderCaps(), listPaint, |
| filteredColor, scalerContextFlags, viewMatrix, props, |
| glyphRunList, target->glyphDrawer()); |
| } else { |
| textBlobCache->makeMRU(cacheBlob.get()); |
| |
| if (CACHE_SANITY_CHECK) { |
| int glyphCount = glyphRunList.totalGlyphCount(); |
| int runCount = glyphRunList.runCount(); |
| sk_sp<GrTextBlob> sanityBlob(textBlobCache->makeBlob(glyphCount, runCount)); |
| sanityBlob->setupKey(key, blurRec, listPaint); |
| this->regenerateGlyphRunList( |
| sanityBlob.get(), glyphCache, *context->contextPriv().caps()->shaderCaps(), |
| listPaint, filteredColor, scalerContextFlags, viewMatrix, props, glyphRunList, |
| target->glyphDrawer()); |
| GrTextBlob::AssertEqual(*sanityBlob, *cacheBlob); |
| } |
| } |
| } else { |
| if (canCache) { |
| cacheBlob = textBlobCache->makeCachedBlob(glyphRunList, key, blurRec, listPaint); |
| } else { |
| cacheBlob = textBlobCache->makeBlob(glyphRunList); |
| } |
| this->regenerateGlyphRunList(cacheBlob.get(), glyphCache, |
| *context->contextPriv().caps()->shaderCaps(), listPaint, |
| filteredColor, scalerContextFlags, viewMatrix, props, |
| glyphRunList, target->glyphDrawer()); |
| } |
| |
| cacheBlob->flush(target, props, fDistanceAdjustTable.get(), listPaint, filteredColor, |
| clip, viewMatrix, origin.x(), origin.y()); |
| } |
| |
| void GrTextContext::AppendGlyph(GrTextBlob* blob, int runIndex, |
| GrGlyphCache* grGlyphCache, |
| sk_sp<GrTextStrike>* strike, |
| const SkGlyph& skGlyph, GrGlyph::MaskStyle maskStyle, |
| SkScalar sx, SkScalar sy, |
| GrColor color, SkGlyphCache* skGlyphCache, |
| SkScalar textRatio, bool needsTransform) { |
| if (!*strike) { |
| *strike = grGlyphCache->getStrike(skGlyphCache); |
| } |
| |
| GrGlyph::PackedID id = GrGlyph::Pack(skGlyph.getGlyphID(), |
| skGlyph.getSubXFixed(), |
| skGlyph.getSubYFixed(), |
| maskStyle); |
| GrGlyph* glyph = (*strike)->getGlyph(skGlyph, id, skGlyphCache); |
| if (!glyph) { |
| return; |
| } |
| |
| SkASSERT(skGlyph.fWidth == glyph->width()); |
| SkASSERT(skGlyph.fHeight == glyph->height()); |
| |
| SkRect glyphRect = rect_to_draw(skGlyph, {sx, sy}, textRatio, maskStyle); |
| |
| if (!glyphRect.isEmpty()) { |
| blob->appendGlyph(runIndex, glyphRect, color, *strike, glyph, !needsTransform); |
| } |
| } |
| |
| void GrTextContext::regenerateGlyphRunList(GrTextBlob* cacheBlob, |
| GrGlyphCache* glyphCache, |
| const GrShaderCaps& shaderCaps, |
| const SkPaint& paint, |
| GrColor filteredColor, |
| SkScalerContextFlags scalerContextFlags, |
| const SkMatrix& viewMatrix, |
| const SkSurfaceProps& props, |
| const SkGlyphRunList& glyphRunList, |
| SkGlyphRunListDrawer* glyphDrawer) { |
| SkPoint origin = glyphRunList.origin(); |
| cacheBlob->initReusableBlob( |
| glyphRunList.paint().computeLuminanceColor(), viewMatrix, origin.x(), origin.y()); |
| |
| int runIndex = 0; |
| for (const auto& glyphRun : glyphRunList) { |
| const SkPaint& runPaint = glyphRun.paint(); |
| cacheBlob->push_back_run(runIndex); |
| |
| cacheBlob->setRunPaintFlags(runIndex, runPaint.getFlags()); |
| |
| if (CanDrawAsDistanceFields(runPaint, viewMatrix, props, |
| shaderCaps.supportsDistanceFieldText(), fOptions)) { |
| bool hasWCoord = viewMatrix.hasPerspective() |
| || fOptions.fDistanceFieldVerticesAlwaysHaveW; |
| |
| // Setup distance field runPaint and text ratio |
| SkScalar textRatio; |
| SkPaint distanceFieldPaint{runPaint}; |
| SkScalerContextFlags flags; |
| InitDistanceFieldPaint(cacheBlob, &distanceFieldPaint, viewMatrix, |
| fOptions, &textRatio, &flags); |
| cacheBlob->setHasDistanceField(); |
| cacheBlob->setSubRunHasDistanceFields(runIndex, runPaint.isLCDRenderText(), |
| runPaint.isAntiAlias(), hasWCoord); |
| |
| FallbackGlyphRunHelper fallbackTextHelper( |
| viewMatrix, runPaint, glyphCache->getGlyphSizeLimit(), textRatio); |
| |
| sk_sp<GrTextStrike> currStrike; |
| |
| { |
| |
| auto cache = cacheBlob->setupCache( |
| runIndex, props, flags, distanceFieldPaint, nullptr); |
| |
| auto perSDF = |
| [cacheBlob, runIndex, glyphCache, &currStrike, |
| filteredColor, cache{cache.get()}, textRatio] |
| (const SkGlyph& glyph, SkPoint position) { |
| SkScalar sx = position.fX, |
| sy = position.fY; |
| AppendGlyph(cacheBlob, runIndex, glyphCache, &currStrike, |
| glyph, GrGlyph::kDistance_MaskStyle, sx, sy, |
| filteredColor, |
| cache, textRatio, true); |
| }; |
| |
| auto perPath = |
| [cacheBlob, runIndex, textRatio] |
| (const SkPath* path, const SkGlyph& glyph, SkPoint position) { |
| SkScalar sx = position.fX, |
| sy = position.fY; |
| cacheBlob->appendPathGlyph( |
| runIndex, *path, sx, sy, textRatio, false); |
| }; |
| |
| auto perFallback = |
| [&fallbackTextHelper] |
| (const SkGlyph& glyph, SkPoint position) { |
| fallbackTextHelper.appendGlyph(glyph, glyph.getGlyphID(), position); |
| }; |
| |
| glyphDrawer->drawGlyphRunAsSDFWithFallback( |
| cache.get(), glyphRun, origin, textRatio, perSDF, perPath, perFallback); |
| } |
| |
| fallbackTextHelper.drawGlyphs( |
| cacheBlob, runIndex, glyphCache, props, |
| runPaint, filteredColor, scalerContextFlags); |
| |
| } else if (SkDraw::ShouldDrawTextAsPaths(runPaint, viewMatrix)) { |
| // Ensure the blob is set for bitmaptext |
| cacheBlob->setHasBitmap(); |
| |
| // setup our std runPaint, in hopes of getting hits in the cache |
| SkPaint pathPaint(runPaint); |
| SkScalar matrixScale = pathPaint.setupForAsPaths(); |
| |
| FallbackGlyphRunHelper fallbackTextHelper( |
| viewMatrix, runPaint, glyphCache->getGlyphSizeLimit(), matrixScale); |
| |
| // Temporarily jam in kFill, so we only ever ask for the raw outline from the cache. |
| pathPaint.setStyle(SkPaint::kFill_Style); |
| pathPaint.setPathEffect(nullptr); |
| |
| auto cache = SkStrikeCache::FindOrCreateStrikeExclusive( |
| pathPaint, &props, SkScalerContextFlags::kFakeGammaAndBoostContrast, nullptr); |
| |
| auto drawOnePath = |
| [&fallbackTextHelper, matrixScale, runIndex, cacheBlob] |
| (const SkPath* path, const SkGlyph& glyph, SkPoint position) { |
| if (glyph.fMaskFormat == SkMask::kARGB32_Format) { |
| fallbackTextHelper.appendGlyph(glyph, glyph.getGlyphID(), position); |
| } else { |
| if (path != nullptr) { |
| cacheBlob->appendPathGlyph( |
| runIndex, *path, position.fX, position.fY, matrixScale, false); |
| } |
| } |
| }; |
| |
| glyphDrawer->drawUsingPaths(glyphRun, origin, cache.get(), drawOnePath); |
| |
| fallbackTextHelper.drawGlyphs( |
| cacheBlob, runIndex, glyphCache, props, |
| runPaint, filteredColor, scalerContextFlags); |
| |
| } else { |
| // Ensure the blob is set for bitmaptext |
| cacheBlob->setHasBitmap(); |
| sk_sp<GrTextStrike> currStrike; |
| auto cache = cacheBlob->setupCache( |
| runIndex, props, scalerContextFlags, runPaint, &viewMatrix); |
| |
| auto perGlyph = |
| [cacheBlob, runIndex, glyphCache, &currStrike, |
| filteredColor, cache{cache.get()}] |
| (const SkGlyph& glyph, SkPoint mappedPt) { |
| SkScalar sx = SkScalarFloorToScalar(mappedPt.fX), |
| sy = SkScalarFloorToScalar(mappedPt.fY); |
| AppendGlyph(cacheBlob, runIndex, glyphCache, &currStrike, |
| glyph, GrGlyph::kCoverage_MaskStyle, sx, sy, |
| filteredColor, cache, SK_Scalar1, false); |
| }; |
| |
| auto perPath = |
| [cacheBlob, runIndex] |
| (const SkPath* path, const SkGlyph& glyph, SkPoint position) { |
| SkScalar sx = SkScalarFloorToScalar(position.fX), |
| sy = SkScalarFloorToScalar(position.fY); |
| cacheBlob->appendPathGlyph( |
| runIndex, *path, sx, sy, SK_Scalar1, true); |
| }; |
| |
| glyphDrawer->drawGlyphRunAsBMPWithPathFallback( |
| cache.get(), glyphRun, origin, viewMatrix, perGlyph, perPath); |
| } |
| runIndex += 1; |
| } |
| } |
| |
| #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); |
| |
| GrColor filteredColor = generate_filtered_color(skPaint, rtc->colorSpaceInfo()); |
| |
| 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); |
| // Use the text and textLen below, because we don't want to mess with the paint. |
| SkScalerContextFlags scalerContextFlags = |
| ComputeScalerContextFlags(rtc->colorSpaceInfo()); |
| textContext->regenerateGlyphRunList( |
| blob.get(), glyphCache, *context->contextPriv().caps()->shaderCaps(), skPaint, |
| filteredColor, scalerContextFlags, viewMatrix, surfaceProps, |
| glyphRunList, rtc->textTarget()->glyphDrawer()); |
| } |
| |
| 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 |