| /* |
| * 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. |
| */ |
| |
| #ifndef SkGlyphRun_DEFINED |
| #define SkGlyphRun_DEFINED |
| |
| #include <functional> |
| #include <vector> |
| |
| #include "SkFont.h" |
| #include "SkPaint.h" |
| #include "SkPoint.h" |
| #include "SkSpan.h" |
| #include "SkTemplates.h" |
| #include "SkTypes.h" |
| |
| class SkGlyph; |
| |
| class SkGlyphRun { |
| public: |
| SkGlyphRun() = default; |
| SkGlyphRun(const SkFont& font, |
| SkSpan<const SkPoint> positions, |
| SkSpan<const SkGlyphID> glyphIDs, |
| SkSpan<const char> text, |
| SkSpan<const uint32_t> clusters); |
| SkGlyphRun(const SkGlyphRun& glyphRun, const SkFont& font); |
| |
| // A function that turns an SkGlyphRun into an SkGlyphRun for each glyph. |
| using PerGlyph = std::function<void (const SkGlyphRun&)>; |
| void eachGlyphToGlyphRun(PerGlyph perGlyph); |
| |
| void filloutGlyphsAndPositions(SkGlyphID* glyphIDs, SkPoint* positions); |
| |
| size_t runSize() const { return fGlyphIDs.size(); } |
| SkSpan<const SkPoint> positions() const { return fPositions.toConst(); } |
| SkSpan<const SkGlyphID> glyphsIDs() const { return fGlyphIDs; } |
| const SkFont& font() const { return fFont; } |
| SkSpan<const uint32_t> clusters() const { return fClusters; } |
| SkSpan<const char> text() const { return fText; } |
| |
| private: |
| // Positions of each glyph. |
| const SkSpan<const SkPoint> fPositions; |
| // This is temporary while converting from the old per glyph code to the bulk code. |
| const SkSpan<const SkGlyphID> fGlyphIDs; |
| // Original text from SkTextBlob if present. Will be empty of not present. |
| const SkSpan<const char> fText; |
| // Original clusters from SkTextBlob if present. Will be empty if not present. |
| const SkSpan<const uint32_t> fClusters; |
| // Paint for this run modified to have glyph encoding and left alignment. |
| SkFont fFont; |
| }; |
| |
| class SkGlyphRunList { |
| const SkPaint* fOriginalPaint{nullptr}; // This should be deleted soon. |
| // The text blob is needed to hookup the call back that the SkTextBlob destructor calls. It |
| // should be used for nothing else |
| const SkTextBlob* fOriginalTextBlob{nullptr}; |
| SkPoint fOrigin = {0, 0}; |
| SkSpan<const SkGlyphRun> fGlyphRuns; |
| |
| public: |
| SkGlyphRunList(); |
| // Blob maybe null. |
| SkGlyphRunList( |
| const SkPaint& paint, |
| const SkTextBlob* blob, |
| SkPoint origin, |
| SkSpan<const SkGlyphRun> glyphRunList); |
| |
| SkGlyphRunList(const SkGlyphRun& glyphRun, const SkPaint& paint); |
| |
| uint64_t uniqueID() const; |
| bool anyRunsLCD() const; |
| bool anyRunsSubpixelPositioned() const; |
| void temporaryShuntBlobNotifyAddedToCache(uint32_t cacheID) const; |
| |
| bool canCache() const { return fOriginalTextBlob != nullptr; } |
| size_t runCount() const { return fGlyphRuns.size(); } |
| size_t totalGlyphCount() const { |
| size_t glyphCount = 0; |
| for(const auto& run : fGlyphRuns) { |
| glyphCount += run.runSize(); |
| } |
| return glyphCount; |
| } |
| |
| SkPoint origin() const { return fOrigin; } |
| const SkPaint& paint() const { return *fOriginalPaint; } |
| const SkTextBlob* blob() const { return fOriginalTextBlob; } |
| |
| auto begin() -> decltype(fGlyphRuns.begin()) { return fGlyphRuns.begin(); } |
| auto end() -> decltype(fGlyphRuns.end()) { return fGlyphRuns.end(); } |
| auto begin() const -> decltype(fGlyphRuns.cbegin()) { return fGlyphRuns.cbegin(); } |
| auto end() const -> decltype(fGlyphRuns.cend()) { return fGlyphRuns.cend(); } |
| auto size() const -> decltype(fGlyphRuns.size()) { return fGlyphRuns.size(); } |
| auto empty() const -> decltype(fGlyphRuns.empty()) { return fGlyphRuns.empty(); } |
| auto operator [] (size_t i) const -> decltype(fGlyphRuns[i]) { return fGlyphRuns[i]; } |
| }; |
| |
| class SkGlyphIDSet { |
| public: |
| SkSpan<const SkGlyphID> uniquifyGlyphIDs( |
| uint32_t universeSize, SkSpan<const SkGlyphID> glyphIDs, |
| SkGlyphID* uniqueGlyphIDs, uint16_t* denseindices); |
| private: |
| size_t fUniverseToUniqueSize{0}; |
| SkAutoTMalloc<uint16_t> fUniverseToUnique; |
| }; |
| |
| class SkGlyphRunBuilder { |
| public: |
| void drawTextAtOrigin(const SkPaint& paint, const void* bytes, size_t byteLength); |
| void drawText( |
| const SkPaint& paint, const void* bytes, size_t byteLength, SkPoint origin); |
| void drawTextBlob(const SkPaint& paint, const SkTextBlob& blob, SkPoint origin); |
| void drawGlyphsWithPositions( |
| const SkPaint& paint, SkSpan<const SkGlyphID> glyphIDs, const SkPoint* pos); |
| |
| const SkGlyphRunList& useGlyphRunList(); |
| |
| private: |
| void initialize(size_t totalRunSize); |
| SkSpan<const SkGlyphID> textToGlyphIDs( |
| const SkPaint& paint, const void* bytes, size_t byteLength); |
| |
| void makeGlyphRun( |
| const SkFont& font, |
| SkSpan<const SkGlyphID> glyphIDs, |
| SkSpan<const SkPoint> positions, |
| SkSpan<const char> text, |
| SkSpan<const uint32_t> clusters); |
| |
| void makeGlyphRunList(const SkPaint& paint, const SkTextBlob* blob, SkPoint origin); |
| |
| void simplifyDrawText( |
| const SkFont& font, SkSpan<const SkGlyphID> glyphIDs, |
| SkPoint origin, SkPoint* positions, |
| SkSpan<const char> text = SkSpan<const char>{}, |
| SkSpan<const uint32_t> clusters = SkSpan<const uint32_t>{}); |
| void simplifyDrawPosTextH( |
| const SkFont& font, SkSpan<const SkGlyphID> glyphIDs, |
| const SkScalar* xpos, SkScalar constY, SkPoint* positions, |
| SkSpan<const char> text = SkSpan<const char>{}, |
| SkSpan<const uint32_t> clusters = SkSpan<const uint32_t>{}); |
| void simplifyDrawPosText( |
| const SkFont& font, SkSpan<const SkGlyphID> glyphIDs, |
| const SkPoint* pos, |
| SkSpan<const char> text = SkSpan<const char>{}, |
| SkSpan<const uint32_t> clusters = SkSpan<const uint32_t>{}); |
| |
| size_t fMaxTotalRunSize{0}; |
| SkAutoTMalloc<SkPoint> fPositions; |
| |
| std::vector<SkGlyphRun> fGlyphRunListStorage; |
| SkGlyphRunList fGlyphRunList; |
| |
| // Used as a temporary for preparing using utfN text. This implies that only one run of |
| // glyph ids will ever be needed because blobs are already glyph based. |
| std::vector<SkGlyphID> fScratchGlyphIDs; |
| |
| // Used as temporary storage for calculating positions for drawText. |
| std::vector<SkPoint> fScratchAdvances; |
| |
| // Used for collecting the set of unique glyphs. |
| SkGlyphIDSet fGlyphIDSet; |
| SkAutoTMalloc<SkGlyphID> fUniqueGlyphIDs; |
| SkAutoTMalloc<uint16_t> fUniqueGlyphIDIndices; |
| }; |
| |
| #endif // SkGlyphRun_DEFINED |