1 /* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SkScalarContext_win_dw_DEFINED 9 #define SkScalarContext_win_dw_DEFINED 10 11 #include "SkScalar.h" 12 #include "SkScalerContext.h" 13 #include "SkTypeface_win_dw.h" 14 #include "SkTypes.h" 15 16 #include <dwrite.h> 17 18 class SkGlyph; 19 class SkDescriptor; 20 21 class SkScalerContext_DW : public SkScalerContext { 22 public: 23 SkScalerContext_DW(DWriteFontTypeface*, const SkDescriptor* desc); 24 virtual ~SkScalerContext_DW(); 25 26 protected: 27 unsigned generateGlyphCount() override; 28 uint16_t generateCharToGlyph(SkUnichar uni) override; 29 void generateAdvance(SkGlyph* glyph) override; 30 void generateMetrics(SkGlyph* glyph) override; 31 void generateImage(const SkGlyph& glyph) override; 32 void generatePath(const SkGlyph& glyph, SkPath* path) override; 33 void generateFontMetrics(SkPaint::FontMetrics*) override; 34 35 private: 36 const void* drawDWMask(const SkGlyph& glyph, 37 DWRITE_RENDERING_MODE renderingMode, 38 DWRITE_TEXTURE_TYPE textureType); 39 40 HRESULT getBoundingBox(SkGlyph* glyph, 41 DWRITE_RENDERING_MODE renderingMode, 42 DWRITE_TEXTURE_TYPE textureType, 43 RECT* bbox); 44 45 SkTDArray<uint8_t> fBits; 46 /** The total matrix without the text height scale. */ 47 SkMatrix fSkXform; 48 /** The total matrix without the text height scale. */ 49 DWRITE_MATRIX fXform; 50 /** The non-rotational part of total matrix without the text height scale. 51 * This is used to find the magnitude of gdi compatible advances. 52 */ 53 DWRITE_MATRIX fGsA; 54 /** The inverse of the rotational part of the total matrix. 55 * This is used to find the direction of gdi compatible advances. 56 */ 57 SkMatrix fG_inv; 58 /** The text size to render with. */ 59 SkScalar fTextSizeRender; 60 /** The text size to measure with. */ 61 SkScalar fTextSizeMeasure; 62 SkAutoTUnref<DWriteFontTypeface> fTypeface; 63 int fGlyphCount; 64 DWRITE_RENDERING_MODE fRenderingMode; 65 DWRITE_TEXTURE_TYPE fTextureType; 66 DWRITE_MEASURING_MODE fMeasuringMode; 67 }; 68 69 #endif 70
