| /* |
| * Copyright 2014 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "GrPathRendering.h" |
| #include "SkDescriptor.h" |
| #include "SkGlyph.h" |
| #include "SkMatrix.h" |
| #include "SkTypeface.h" |
| #include "GrPathRange.h" |
| |
| const GrUserStencilSettings& GrPathRendering::GetStencilPassSettings(FillType fill) { |
| switch (fill) { |
| default: |
| SkFAIL("Unexpected path fill."); |
| case GrPathRendering::kWinding_FillType: { |
| constexpr static GrUserStencilSettings kWindingStencilPass( |
| GrUserStencilSettings::StaticInit< |
| 0xffff, |
| GrUserStencilTest::kAlwaysIfInClip, |
| 0xffff, |
| GrUserStencilOp::kIncWrap, |
| GrUserStencilOp::kIncWrap, |
| 0xffff>() |
| ); |
| return kWindingStencilPass; |
| } |
| case GrPathRendering::kEvenOdd_FillType: { |
| constexpr static GrUserStencilSettings kEvenOddStencilPass( |
| GrUserStencilSettings::StaticInit< |
| 0xffff, |
| GrUserStencilTest::kAlwaysIfInClip, |
| 0xffff, |
| GrUserStencilOp::kInvert, |
| GrUserStencilOp::kInvert, |
| 0xffff>() |
| ); |
| return kEvenOddStencilPass; |
| } |
| } |
| } |
| |
| class GlyphGenerator : public GrPathRange::PathGenerator { |
| public: |
| GlyphGenerator(const SkTypeface& typeface, const SkScalerContextEffects& effects, |
| const SkDescriptor& desc) |
| : fScalerContext(typeface.createScalerContext(effects, &desc)) |
| #ifdef SK_DEBUG |
| , fDesc(desc.copy()) |
| #endif |
| {} |
| |
| int getNumPaths() override { |
| return fScalerContext->getGlyphCount(); |
| } |
| |
| void generatePath(int glyphID, SkPath* out) override { |
| SkGlyph skGlyph; |
| skGlyph.initWithGlyphID(glyphID); |
| fScalerContext->getMetrics(&skGlyph); |
| |
| fScalerContext->getPath(skGlyph, out); |
| } |
| #ifdef SK_DEBUG |
| bool isEqualTo(const SkDescriptor& desc) const override { return *fDesc == desc; } |
| #endif |
| private: |
| const std::unique_ptr<SkScalerContext> fScalerContext; |
| #ifdef SK_DEBUG |
| const std::unique_ptr<SkDescriptor> fDesc; |
| #endif |
| }; |
| |
| GrPathRange* GrPathRendering::createGlyphs(const SkTypeface* typeface, |
| const SkScalerContextEffects& effects, |
| const SkDescriptor* desc, |
| const GrStyle& style) { |
| if (nullptr == typeface) { |
| typeface = SkTypeface::GetDefaultTypeface(); |
| SkASSERT(nullptr != typeface); |
| } |
| |
| if (desc) { |
| sk_sp<GlyphGenerator> generator(new GlyphGenerator(*typeface, effects, *desc)); |
| return this->createPathRange(generator.get(), style); |
| } |
| |
| SkScalerContextRec rec; |
| memset(&rec, 0, sizeof(rec)); |
| rec.fFontID = typeface->uniqueID(); |
| rec.fTextSize = SkPaint::kCanonicalTextSizeForPaths; |
| rec.fPreScaleX = rec.fPost2x2[0][0] = rec.fPost2x2[1][1] = SK_Scalar1; |
| // Don't bake stroke information into the glyphs, we'll let the GPU do the stroking. |
| |
| SkAutoDescriptor ad(sizeof(rec) + SkDescriptor::ComputeOverhead(1)); |
| SkDescriptor* genericDesc = ad.getDesc(); |
| |
| genericDesc->init(); |
| genericDesc->addEntry(kRec_SkDescriptorTag, sizeof(rec), &rec); |
| genericDesc->computeChecksum(); |
| |
| // No effects, so we make a dummy struct |
| SkScalerContextEffects noEffects; |
| |
| sk_sp<GlyphGenerator> generator(new GlyphGenerator(*typeface, noEffects, *genericDesc)); |
| return this->createPathRange(generator.get(), style); |
| } |