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/*
* Copyright 2019 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkStrikeSpec_DEFINED
#define SkStrikeSpec_DEFINED
#include "include/core/SkMaskFilter.h"
#include "include/core/SkPathEffect.h"
#include "include/core/SkSpan.h"
#include "src/core/SkDescriptor.h"
#include "src/text/StrikeForGPU.h"
#include <tuple>
#if defined(SK_GANESH) || defined(SK_GRAPHITE)
#include "src/text/gpu/SDFTControl.h"
namespace sktext::gpu {
class StrikeCache;
class TextStrike;
}
#endif
class SkFont;
class SkPaint;
class SkStrike;
class SkStrikeCache;
class SkSurfaceProps;
class SkStrikeSpec {
public:
SkStrikeSpec(const SkDescriptor& descriptor, sk_sp<SkTypeface> typeface);
SkStrikeSpec(const SkStrikeSpec&);
SkStrikeSpec& operator=(const SkStrikeSpec&) = delete;
SkStrikeSpec(SkStrikeSpec&&);
SkStrikeSpec& operator=(SkStrikeSpec&&) = delete;
~SkStrikeSpec();
// Create a strike spec for mask style cache entries.
static SkStrikeSpec MakeMask(
const SkFont& font,
const SkPaint& paint,
const SkSurfaceProps& surfaceProps,
SkScalerContextFlags scalerContextFlags,
const SkMatrix& deviceMatrix);
// A strike for finding the max size for transforming masks. This is used to calculate the
// maximum dimension of a SubRun of text.
static SkStrikeSpec MakeTransformMask(
const SkFont& font,
const SkPaint& paint,
const SkSurfaceProps& surfaceProps,
SkScalerContextFlags scalerContextFlags,
const SkMatrix& deviceMatrix);
// Create a strike spec for path style cache entries.
static std::tuple<SkStrikeSpec, SkScalar> MakePath(
const SkFont& font,
const SkPaint& paint,
const SkSurfaceProps& surfaceProps,
SkScalerContextFlags scalerContextFlags);
// Create a canonical strike spec for device-less measurements.
static std::tuple<SkStrikeSpec, SkScalar> MakeCanonicalized(
const SkFont& font, const SkPaint* paint = nullptr);
// Create a strike spec without a device, and does not switch over to path for large sizes.
static SkStrikeSpec MakeWithNoDevice(const SkFont& font, const SkPaint* paint = nullptr);
// Make a strike spec for PDF Vector strikes
static SkStrikeSpec MakePDFVector(const SkTypeface& typeface, int* size);
#if (defined(SK_GANESH) || defined(SK_GRAPHITE)) && !defined(SK_DISABLE_SDF_TEXT)
// Create a strike spec for scaled distance field text.
static std::tuple<SkStrikeSpec, SkScalar, sktext::gpu::SDFTMatrixRange> MakeSDFT(
const SkFont& font,
const SkPaint& paint,
const SkSurfaceProps& surfaceProps,
const SkMatrix& deviceMatrix,
const SkPoint& textLocation,
const sktext::gpu::SDFTControl& control);
#endif
sk_sp<sktext::StrikeForGPU> findOrCreateScopedStrike(
sktext::StrikeForGPUCacheInterface* cache) const;
sk_sp<SkStrike> findOrCreateStrike() const;
sk_sp<SkStrike> findOrCreateStrike(SkStrikeCache* cache) const;
std::unique_ptr<SkScalerContext> createScalerContext() const {
SkScalerContextEffects effects{fPathEffect.get(), fMaskFilter.get()};
return fTypeface->createScalerContext(effects, fAutoDescriptor.getDesc());
}
const SkDescriptor& descriptor() const { return *fAutoDescriptor.getDesc(); }
const SkTypeface& typeface() const { return *fTypeface; }
static bool ShouldDrawAsPath(const SkPaint& paint, const SkFont& font, const SkMatrix& matrix);
SkString dump() const;
private:
SkStrikeSpec(
const SkFont& font,
const SkPaint& paint,
const SkSurfaceProps& surfaceProps,
SkScalerContextFlags scalerContextFlags,
const SkMatrix& deviceMatrix);
SkAutoDescriptor fAutoDescriptor;
sk_sp<SkMaskFilter> fMaskFilter{nullptr};
sk_sp<SkPathEffect> fPathEffect{nullptr};
sk_sp<SkTypeface> fTypeface;
};
class SkBulkGlyphMetrics {
public:
explicit SkBulkGlyphMetrics(const SkStrikeSpec& spec);
SkSpan<const SkGlyph*> glyphs(SkSpan<const SkGlyphID> glyphIDs);
const SkGlyph* glyph(SkGlyphID glyphID);
private:
inline static constexpr int kTypicalGlyphCount = 20;
skia_private::AutoSTArray<kTypicalGlyphCount, const SkGlyph*> fGlyphs;
sk_sp<SkStrike> fStrike;
};
class SkBulkGlyphMetricsAndPaths {
public:
explicit SkBulkGlyphMetricsAndPaths(const SkStrikeSpec& spec);
explicit SkBulkGlyphMetricsAndPaths(sk_sp<SkStrike>&& strike);
~SkBulkGlyphMetricsAndPaths();
SkSpan<const SkGlyph*> glyphs(SkSpan<const SkGlyphID> glyphIDs);
const SkGlyph* glyph(SkGlyphID glyphID);
void findIntercepts(const SkScalar bounds[2], SkScalar scale, SkScalar xPos,
const SkGlyph* glyph, SkScalar* array, int* count);
private:
inline static constexpr int kTypicalGlyphCount = 20;
skia_private::AutoSTArray<kTypicalGlyphCount, const SkGlyph*> fGlyphs;
sk_sp<SkStrike> fStrike;
};
class SkBulkGlyphMetricsAndDrawables {
public:
explicit SkBulkGlyphMetricsAndDrawables(const SkStrikeSpec& spec);
explicit SkBulkGlyphMetricsAndDrawables(sk_sp<SkStrike>&& strike);
~SkBulkGlyphMetricsAndDrawables();
SkSpan<const SkGlyph*> glyphs(SkSpan<const SkGlyphID> glyphIDs);
const SkGlyph* glyph(SkGlyphID glyphID);
private:
inline static constexpr int kTypicalGlyphCount = 20;
skia_private::AutoSTArray<kTypicalGlyphCount, const SkGlyph*> fGlyphs;
sk_sp<SkStrike> fStrike;
};
class SkBulkGlyphMetricsAndImages {
public:
explicit SkBulkGlyphMetricsAndImages(const SkStrikeSpec& spec);
explicit SkBulkGlyphMetricsAndImages(sk_sp<SkStrike>&& strike);
~SkBulkGlyphMetricsAndImages();
SkSpan<const SkGlyph*> glyphs(SkSpan<const SkPackedGlyphID> packedIDs);
const SkGlyph* glyph(SkPackedGlyphID packedID);
const SkDescriptor& descriptor() const;
private:
inline static constexpr int kTypicalGlyphCount = 64;
skia_private::AutoSTArray<kTypicalGlyphCount, const SkGlyph*> fGlyphs;
sk_sp<SkStrike> fStrike;
};
#endif // SkStrikeSpec_DEFINED