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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkScalarContext_win_dw_DEFINED
#define SkScalarContext_win_dw_DEFINED
#include "SkScalar.h"
#include "SkScalerContext.h"
#include "SkTypeface_win_dw.h"
#include "SkTypes.h"
#include <dwrite.h>
struct SkGlyph;
class SkDescriptor;
class SkScalerContext_DW : public SkScalerContext {
public:
SkScalerContext_DW(DWriteFontTypeface*, const SkDescriptor* desc);
virtual ~SkScalerContext_DW();
protected:
unsigned generateGlyphCount() SK_OVERRIDE;
uint16_t generateCharToGlyph(SkUnichar uni) SK_OVERRIDE;
void generateAdvance(SkGlyph* glyph) SK_OVERRIDE;
void generateMetrics(SkGlyph* glyph) SK_OVERRIDE;
void generateImage(const SkGlyph& glyph) SK_OVERRIDE;
void generatePath(const SkGlyph& glyph, SkPath* path) SK_OVERRIDE;
void generateFontMetrics(SkPaint::FontMetrics*) SK_OVERRIDE;
private:
const void* drawDWMask(const SkGlyph& glyph,
DWRITE_RENDERING_MODE renderingMode,
DWRITE_TEXTURE_TYPE textureType);
HRESULT getBoundingBox(SkGlyph* glyph,
DWRITE_RENDERING_MODE renderingMode,
DWRITE_TEXTURE_TYPE textureType,
RECT* bbox);
SkTDArray<uint8_t> fBits;
/** The total matrix without the text height scale. */
SkMatrix fSkXform;
/** The total matrix without the text height scale. */
DWRITE_MATRIX fXform;
/** The non-rotational part of total matrix without the text height scale.
* This is used to find the magnitude of gdi compatible advances.
*/
DWRITE_MATRIX fGsA;
/** The inverse of the rotational part of the total matrix.
* This is used to find the direction of gdi compatible advances.
*/
SkMatrix fG_inv;
/** The text size to render with. */
SkScalar fTextSizeRender;
/** The text size to measure with. */
SkScalar fTextSizeMeasure;
SkAutoTUnref<DWriteFontTypeface> fTypeface;
int fGlyphCount;
DWRITE_RENDERING_MODE fRenderingMode;
DWRITE_TEXTURE_TYPE fTextureType;
DWRITE_MEASURING_MODE fMeasuringMode;
};
#endif
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