1
2/*
3 * Copyright 2010 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8
9
10
11#ifndef SkGr_DEFINED
12#define SkGr_DEFINED
13
14#include <stddef.h>
15
16// Gr headers
17#include "GrTypes.h"
18#include "GrContext.h"
19#include "GrFontScaler.h"
20
21// skia headers
22#include "SkBitmap.h"
23#include "SkPath.h"
24#include "SkPoint.h"
25#include "SkRegion.h"
26#include "SkClipStack.h"
27
28////////////////////////////////////////////////////////////////////////////////
29// Sk to Gr Type conversions
30
31GR_STATIC_ASSERT((int)kZero_GrBlendCoeff == (int)SkXfermode::kZero_Coeff);
32GR_STATIC_ASSERT((int)kOne_GrBlendCoeff  == (int)SkXfermode::kOne_Coeff);
33GR_STATIC_ASSERT((int)kSC_GrBlendCoeff   == (int)SkXfermode::kSC_Coeff);
34GR_STATIC_ASSERT((int)kISC_GrBlendCoeff  == (int)SkXfermode::kISC_Coeff);
35GR_STATIC_ASSERT((int)kDC_GrBlendCoeff   == (int)SkXfermode::kDC_Coeff);
36GR_STATIC_ASSERT((int)kIDC_GrBlendCoeff  == (int)SkXfermode::kIDC_Coeff);
37GR_STATIC_ASSERT((int)kSA_GrBlendCoeff   == (int)SkXfermode::kSA_Coeff);
38GR_STATIC_ASSERT((int)kISA_GrBlendCoeff  == (int)SkXfermode::kISA_Coeff);
39GR_STATIC_ASSERT((int)kDA_GrBlendCoeff   == (int)SkXfermode::kDA_Coeff);
40GR_STATIC_ASSERT((int)kIDA_GrBlendCoeff  == (int)SkXfermode::kIDA_Coeff);
41
42#define sk_blend_to_grblend(X) ((GrBlendCoeff)(X))
43
44///////////////////////////////////////////////////////////////////////////////
45
46#include "SkColorPriv.h"
47
48#ifdef SK_SUPPORT_LEGACY_BITMAP_CONFIG
49/**
50 *  Convert the SkBitmap::Config to the corresponding PixelConfig, or
51 *  kUnknown_PixelConfig if the conversion cannot be done.
52 */
53GrPixelConfig SkBitmapConfig2GrPixelConfig(SkBitmap::Config);
54#endif
55GrPixelConfig SkImageInfo2GrPixelConfig(SkColorType, SkAlphaType);
56
57static inline GrPixelConfig SkImageInfo2GrPixelConfig(const SkImageInfo& info) {
58    return SkImageInfo2GrPixelConfig(info.colorType(), info.alphaType());
59}
60
61bool GrPixelConfig2ColorType(GrPixelConfig, SkColorType*);
62
63static inline GrColor SkColor2GrColor(SkColor c) {
64    SkPMColor pm = SkPreMultiplyColor(c);
65    unsigned r = SkGetPackedR32(pm);
66    unsigned g = SkGetPackedG32(pm);
67    unsigned b = SkGetPackedB32(pm);
68    unsigned a = SkGetPackedA32(pm);
69    return GrColorPackRGBA(r, g, b, a);
70}
71
72static inline GrColor SkColor2GrColorJustAlpha(SkColor c) {
73    U8CPU a = SkColorGetA(c);
74    return GrColorPackRGBA(a, a, a, a);
75}
76
77////////////////////////////////////////////////////////////////////////////////
78
79bool GrIsBitmapInCache(const GrContext*, const SkBitmap&, const GrTextureParams*);
80
81GrTexture* GrLockAndRefCachedBitmapTexture(GrContext*, const SkBitmap&, const GrTextureParams*);
82
83void GrUnlockAndUnrefCachedBitmapTexture(GrTexture*);
84
85////////////////////////////////////////////////////////////////////////////////
86
87// Converts a SkPaint to a GrPaint, ignoring the SkPaint's shader.
88// Sets the color of GrPaint to the value of the parameter grColor
89// Callers may subsequently modify the GrPaint. Setting constantColor indicates
90// that the final paint will draw the same color at every pixel. This allows
91// an optimization where the the color filter can be applied to the SkPaint's
92// color once while converting to GrPaint and then ignored.
93void SkPaint2GrPaintNoShader(GrContext* context, const SkPaint& skPaint, GrColor grColor,
94                             bool constantColor, GrPaint* grPaint);
95
96// This function is similar to skPaint2GrPaintNoShader but also converts
97// skPaint's shader to a GrTexture/GrEffectStage if possible.
98// constantColor has the same meaning as in skPaint2GrPaintNoShader.
99void SkPaint2GrPaintShader(GrContext* context, const SkPaint& skPaint,
100                           bool constantColor, GrPaint* grPaint);
101
102////////////////////////////////////////////////////////////////////////////////
103// Classes
104
105class SkGlyphCache;
106
107class SkGrFontScaler : public GrFontScaler {
108public:
109    explicit SkGrFontScaler(SkGlyphCache* strike);
110    virtual ~SkGrFontScaler();
111
112    // overrides
113    virtual const GrKey* getKey();
114    virtual GrMaskFormat getMaskFormat();
115    virtual bool getPackedGlyphBounds(GrGlyph::PackedID, SkIRect* bounds) SK_OVERRIDE;
116    virtual bool getPackedGlyphImage(GrGlyph::PackedID, int width, int height,
117                                     int rowBytes, void* image) SK_OVERRIDE;
118    virtual bool getPackedGlyphDFBounds(GrGlyph::PackedID, SkIRect* bounds) SK_OVERRIDE;
119    virtual bool getPackedGlyphDFImage(GrGlyph::PackedID, int width, int height,
120                                       void* image) SK_OVERRIDE;
121    virtual bool getGlyphPath(uint16_t glyphID, SkPath*);
122
123private:
124    SkGlyphCache* fStrike;
125    GrKey*  fKey;
126//    DECLARE_INSTANCE_COUNTER(SkGrFontScaler);
127};
128
129////////////////////////////////////////////////////////////////////////////////
130
131#endif
132