include/gpu/GrTextContext.h - Issue 145073005: Move GrTextContext to private interface

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Issue 145073005: Move GrTextContext to private interface (Closed) Base URL: https://skia.googlesource.com/skia.git@master

Patch Set: Remove use of GrTextContext.h from GrSkGpuDevice.h Created 6 years, 10 months ago

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1 /*

2 * Copyright 2010 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 GrTextContext_DEFINED

9 #define GrTextContext_DEFINED

10

11 #include "GrPoint.h"

12 #include "GrGlyph.h"

13 #include "GrPaint.h"

14 #include "SkDeviceProperties.h"

15

16 #include "SkPostConfig.h"

17

18 class GrContext;

19 class GrDrawTarget;

20 class GrFontScaler;

21

22 /*

23 * This class wraps the state for a single text render

24 */

25 class GrTextContext {

26 public:

27 virtual ~GrTextContext() {}

28 virtual void drawText(const char text[], size_t byteLength, SkScalar x, SkSc alar y) = 0;

29 virtual void drawPosText(const char text[], size_t byteLength,

30 const SkScalar pos[], SkScalar constY,

31 int scalarsPerPosition) = 0;

32

33 protected:

34 GrTextContext(GrContext*, const GrPaint&, const SkPaint&, const SkDeviceProp erties&);

35

36 static GrFontScaler* GetGrFontScaler(SkGlyphCache* cache);

37 static void MeasureText(SkGlyphCache* cache, SkDrawCacheProc glyphCacheProc,

38 const char text[], size_t byteLength, SkVector* stop Vector);

39

40 GrContext* fContext;

41 GrPaint fPaint;

42 SkPaint fSkPaint;

43 SkDeviceProperties fDeviceProperties;

44 GrDrawTarget* fDrawTarget;

45

46 SkIRect fClipRect;

47 };

48

49 /*

50 * These classes wrap the creation of a single text context for a given GPU devi ce. The

51 * assumption is that we'll only be using one text context at a time for that de vice.

52 */

53 class GrTextContextManager {

54 public:

55 virtual ~GrTextContextManager() {}

56 virtual GrTextContext* create(GrContext* grContext, const GrPaint& grPaint,

57 const SkPaint& skPaint, const SkDeviceProperti es& props) = 0;

58 virtual bool canDraw(const SkPaint& paint, const SkMatrix& ctm) = 0;

59 };

60

61 template <class TextContextClass>

62 class GrTTextContextManager : public GrTextContextManager {

63 private:

64 class ManagedTextContext : public TextContextClass {

65 public:

66 virtual ~ManagedTextContext() {}

67

68 ManagedTextContext(GrContext* grContext,

69 const GrPaint& grPaint,

70 const SkPaint& skPaint,

71 const SkDeviceProperties& properties,

72 GrTTextContextManager<TextContextClass>* manager) :

73 TextContextClass(grContext, grPaint, skPaint, properti es) {

74 fManager = manager;

75 }

76

77 static void operator delete(void* ptr) {

78 if (ptr == NULL) {

79 return;

80 }

81 ManagedTextContext* context = reinterpret_cast<ManagedTextContext*>( ptr);

82 context->fManager->recycle(context);

83 }

84

85 static void operator delete(void, void) {

86 }

87

88 GrTTextContextManager<TextContextClass>* fManager;

89 };

90

91 public:

92 GrTTextContextManager() {

93 fAllocation = sk_malloc_throw(sizeof(ManagedTextContext));

94 fUsed = false;

95 }

96

97 virtual ~GrTTextContextManager() {

98 SkASSERT(!fUsed);

99 sk_free(fAllocation);

100 }

101

102 virtual GrTextContext* create(GrContext* grContext, const GrPaint& grPaint,

103 const SkPaint& skPaint, const SkDeviceProperti es& properties)

104 SK_OVERRIDE {

105 // add check for usePath here?

106 SkASSERT(!fUsed);

107 ManagedTextContext* obj = SkNEW_PLACEMENT_ARGS(fAllocation, ManagedTextC ontext,

108 (grContext, grPaint, skPa int, properties,

109 this));

110 fUsed = true;

111 return obj;

112 }

113

114 virtual bool canDraw(const SkPaint& paint, const SkMatrix& ctm) SK_OVERRIDE {

115 return TextContextClass::CanDraw(paint, ctm);

116 }

117

118 private:

119 void recycle(GrTextContext* textContext) {

120 SkASSERT((void*)textContext == fAllocation);

121 SkASSERT(fUsed);

122 fUsed = false;

123 }

124

125 void* fAllocation;

126 bool fUsed;

127 };

128

129 #endif

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