skia/sgl/SkBlitter.h - Issue 113827: Remove the remainder of the skia source code from the Chromium repo....

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Issue 113827: Remove the remainder of the skia source code from the Chromium repo.... (Closed) Base URL: svn://chrome-svn/chrome/trunk/src/

Patch Set: Created 11 years, 7 months ago

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1 /* libs/graphics/sgl/SkBlitter.h

2 **

3 ** Copyright 2006, The Android Open Source Project

4 **

5 ** Licensed under the Apache License, Version 2.0 (the "License");

6 ** you may not use this file except in compliance with the License.

7 ** You may obtain a copy of the License at

8 **

9 ** http://www.apache.org/licenses/LICENSE-2.0

10 **

11 ** Unless required by applicable law or agreed to in writing, software

12 ** distributed under the License is distributed on an "AS IS" BASIS,

13 ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

14 ** See the License for the specific language governing permissions and

15 ** limitations under the License.

16 */

17

18 #ifndef SkBlitter_DEFINED

19 #define SkBlitter_DEFINED

20

21 #include "SkBitmap.h"

22 #include "SkMatrix.h"

23 #include "SkPaint.h"

24 #include "SkRefCnt.h"

25 #include "SkRegion.h"

26 #include "SkMask.h"

27

28 class SkBlitter {

29 public:

30 virtual ~SkBlitter();

31

32 virtual void blitH(int x, int y, int width);

33 virtual void blitAntiH(int x, int y, const SkAlpha[], const int16_t runs[]);

34 virtual void blitV(int x, int y, int height, SkAlpha alpha);

35 virtual void blitRect(int x, int y, int width, int height);

36 virtual void blitMask(const SkMask&, const SkIRect& clip);

37

38 /* If the blitter just sets a single value for each pixel, return the

39 bitmap it draws into, and assign value. If not, return NULL and ignore

40 the value parameter.

41 */

42 virtual const SkBitmap* justAnOpaqueColor(uint32_t* value);

43

44 // not virtual, just helpers

45 void blitMaskRegion(const SkMask& mask, const SkRegion& clip);

46 void blitRectRegion(const SkIRect& rect, const SkRegion& clip);

47 void blitRegion(const SkRegion& clip);

48

49 // factories

50 static SkBlitter* Choose(const SkBitmap& device,

51 const SkMatrix& matrix,

52 const SkPaint& paint) {

53 return Choose(device, matrix, paint, NULL, 0);

54 }

55

56 static SkBlitter* Choose(const SkBitmap& device,

57 const SkMatrix& matrix,

58 const SkPaint& paint,

59 void* storage, size_t storageSize);

60

61 static SkBlitter* ChooseSprite(const SkBitmap& device,

62 const SkPaint&,

63 const SkBitmap& src,

64 int left, int top,

65 void* storage, size_t storageSize);

66

67 private:

68 };

69

70 /** This blitter silently never draws anything.

71 */

72 class SkNullBlitter : public SkBlitter {

73 public:

74 virtual void blitH(int x, int y, int width);

75 virtual void blitAntiH(int x, int y, const SkAlpha[], const int16_t runs[]);

76 virtual void blitV(int x, int y, int height, SkAlpha alpha);

77 virtual void blitRect(int x, int y, int width, int height);

78 virtual void blitMask(const SkMask&, const SkIRect& clip);

79 virtual const SkBitmap* justAnOpaqueColor(uint32_t* value);

80 };

81

82 /** Wraps another (real) blitter, and ensures that the real blitter is only

83 called with coordinates that have been clipped by the specified clipRect.

84 This means the caller need not perform the clipping ahead of time.

85 */

86 class SkRectClipBlitter : public SkBlitter {

87 public:

88 void init(SkBlitter* blitter, const SkIRect& clipRect) {

89 SkASSERT(!clipRect.isEmpty());

90 fBlitter = blitter;

91 fClipRect = clipRect;

92 }

93

94 // overrides

95 virtual void blitH(int x, int y, int width);

96 virtual void blitAntiH(int x, int y, const SkAlpha[], const int16_t runs[]);

97 virtual void blitV(int x, int y, int height, SkAlpha alpha);

98 virtual void blitRect(int x, int y, int width, int height);

99 virtual void blitMask(const SkMask&, const SkIRect& clip);

100 virtual const SkBitmap* justAnOpaqueColor(uint32_t* value);

101

102 private:

103 SkBlitter* fBlitter;

104 SkIRect fClipRect;

105 };

106

107 /** Wraps another (real) blitter, and ensures that the real blitter is only

108 called with coordinates that have been clipped by the specified clipRgn.

109 This means the caller need not perform the clipping ahead of time.

110 */

111 class SkRgnClipBlitter : public SkBlitter {

112 public:

113 void init(SkBlitter* blitter, const SkRegion* clipRgn) {

114 SkASSERT(clipRgn && !clipRgn->isEmpty());

115 fBlitter = blitter;

116 fRgn = clipRgn;

117 }

118

119 // overrides

120 virtual void blitH(int x, int y, int width);

121 virtual void blitAntiH(int x, int y, const SkAlpha[], const int16_t runs[]);

122 virtual void blitV(int x, int y, int height, SkAlpha alpha);

123 virtual void blitRect(int x, int y, int width, int height);

124 virtual void blitMask(const SkMask&, const SkIRect& clip);

125 virtual const SkBitmap* justAnOpaqueColor(uint32_t* value);

126

127 private:

128 SkBlitter* fBlitter;

129 const SkRegion* fRgn;

130 };

131

132 class SkBlitterClipper {

133 public:

134 SkBlitter* apply(SkBlitter* blitter, const SkRegion* clip,

135 const SkIRect* bounds = NULL);

136

137 private:

138 SkNullBlitter fNullBlitter;

139 SkRectClipBlitter fRectBlitter;

140 SkRgnClipBlitter fRgnBlitter;

141 };

142

143 #endif

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