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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2013 Google Inc. | 3 * Copyright 2013 Google Inc. |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 #ifndef SkGLContextHelper_DEFINED | 8 #ifndef SkGLContextHelper_DEFINED |
9 #define SkGLContextHelper_DEFINED | 9 #define SkGLContextHelper_DEFINED |
10 | 10 |
11 #include "GrGLExtensions.h" | |
12 #include "GrGLInterface.h" | 11 #include "GrGLInterface.h" |
13 | 12 |
14 /** | 13 /** |
15 * Create an offscreen opengl context with an RGBA8 / 8bit stencil FBO. | 14 * Create an offscreen opengl context with an RGBA8 / 8bit stencil FBO. |
16 * Provides a GrGLInterface struct of function pointers for the context. | 15 * Provides a GrGLInterface struct of function pointers for the context. |
17 */ | 16 */ |
18 | 17 |
19 class SkGLContextHelper : public SkRefCnt { | 18 class SkGLContextHelper : public SkRefCnt { |
20 public: | 19 public: |
21 SK_DECLARE_INST_COUNT(SkGLContextHelper) | 20 SK_DECLARE_INST_COUNT(SkGLContextHelper) |
(...skipping 19 matching lines...) Expand all Loading... |
41 * | 40 * |
42 * If the drawing surface provided by the platform is double buffered this | 41 * If the drawing surface provided by the platform is double buffered this |
43 * call will cause the platform to swap which buffer is currently being | 42 * call will cause the platform to swap which buffer is currently being |
44 * targeted. If the current surface does not include a back buffer, this | 43 * targeted. If the current surface does not include a back buffer, this |
45 * call has no effect. | 44 * call has no effect. |
46 */ | 45 */ |
47 virtual void swapBuffers() const = 0; | 46 virtual void swapBuffers() const = 0; |
48 | 47 |
49 bool hasExtension(const char* extensionName) const { | 48 bool hasExtension(const char* extensionName) const { |
50 SkASSERT(NULL != fGL); | 49 SkASSERT(NULL != fGL); |
51 return fExtensions.has(extensionName); | 50 return fGL->hasExtension(extensionName); |
52 } | 51 } |
53 | 52 |
54 protected: | 53 protected: |
55 /** | 54 /** |
56 * Subclass implements this to make a GL context. The returned GrGLInterface | 55 * Subclass implements this to make a GL context. The returned GrGLInterface |
57 * should be populated with functions compatible with the context. The | 56 * should be populated with functions compatible with the context. The |
58 * format and size of backbuffers does not matter since an FBO will be | 57 * format and size of backbuffers does not matter since an FBO will be |
59 * created. | 58 * created. |
60 */ | 59 */ |
61 virtual const GrGLInterface* createGLContext() = 0; | 60 virtual const GrGLInterface* createGLContext() = 0; |
62 | 61 |
63 /** | 62 /** |
64 * Subclass should destroy the underlying GL context. | 63 * Subclass should destroy the underlying GL context. |
65 */ | 64 */ |
66 virtual void destroyGLContext() = 0; | 65 virtual void destroyGLContext() = 0; |
67 | 66 |
68 private: | 67 private: |
69 GrGLExtensions fExtensions; | |
70 GrGLuint fFBO; | 68 GrGLuint fFBO; |
71 GrGLuint fColorBufferID; | 69 GrGLuint fColorBufferID; |
72 GrGLuint fDepthStencilBufferID; | 70 GrGLuint fDepthStencilBufferID; |
73 const GrGLInterface* fGL; | 71 const GrGLInterface* fGL; |
74 | 72 |
75 typedef SkRefCnt INHERITED; | 73 typedef SkRefCnt INHERITED; |
76 }; | 74 }; |
77 | 75 |
78 /** | 76 /** |
79 * Helper macros for using the GL context through the GrGLInterface. Example: | 77 * Helper macros for using the GL context through the GrGLInterface. Example: |
80 * SK_GL(glCtx, GenTextures(1, &texID)); | 78 * SK_GL(glCtx, GenTextures(1, &texID)); |
81 */ | 79 */ |
82 #define SK_GL(ctx, X) (ctx).gl()->f ## X; \ | 80 #define SK_GL(ctx, X) (ctx).gl()->f ## X; \ |
83 SkASSERT(GR_GL_NO_ERROR == (ctx).gl()->fGetError()) | 81 SkASSERT(GR_GL_NO_ERROR == (ctx).gl()->fGetError()) |
84 #define SK_GL_RET(ctx, RET, X) (RET) = (ctx).gl()->f ## X; \ | 82 #define SK_GL_RET(ctx, RET, X) (RET) = (ctx).gl()->f ## X; \ |
85 SkASSERT(GR_GL_NO_ERROR == (ctx).gl()->fGetError()) | 83 SkASSERT(GR_GL_NO_ERROR == (ctx).gl()->fGetError()) |
86 #define SK_GL_NOERRCHECK(ctx, X) (ctx).gl()->f ## X | 84 #define SK_GL_NOERRCHECK(ctx, X) (ctx).gl()->f ## X |
87 #define SK_GL_RET_NOERRCHECK(ctx, RET, X) (RET) = (ctx).gl()->f ## X | 85 #define SK_GL_RET_NOERRCHECK(ctx, RET, X) (RET) = (ctx).gl()->f ## X |
88 | 86 |
89 #endif | 87 #endif |
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