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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2011 Google Inc. | 3 * Copyright 2011 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 SkGLContext_DEFINED | 8 #ifndef SkGLContext_DEFINED |
9 #define SkGLContext_DEFINED | 9 #define SkGLContext_DEFINED |
10 | 10 |
| 11 #include "GrGLExtensions.h" |
11 #include "GrGLInterface.h" | 12 #include "GrGLInterface.h" |
12 #include "SkString.h" | |
13 | 13 |
14 /** | 14 /** |
15 * Create an offscreen opengl context with an RGBA8 / 8bit stencil FBO. | 15 * Create an offscreen opengl context with an RGBA8 / 8bit stencil FBO. |
16 * Provides a GrGLInterface struct of function pointers for the context. | 16 * Provides a GrGLInterface struct of function pointers for the context. |
17 */ | 17 */ |
18 | 18 |
19 class SkGLContext : public SkRefCnt { | 19 class SkGLContext : public SkRefCnt { |
20 public: | 20 public: |
21 SK_DECLARE_INST_COUNT(SkGLContext) | 21 SK_DECLARE_INST_COUNT(SkGLContext) |
22 | 22 |
23 SkGLContext(); | 23 SkGLContext(); |
24 virtual ~SkGLContext(); | 24 virtual ~SkGLContext(); |
25 | 25 |
26 /** | 26 /** |
27 * Initializes the context and makes it current. | 27 * Initializes the context and makes it current. |
28 */ | 28 */ |
29 bool init(const int width, const int height); | 29 bool init(const int width, const int height); |
30 | 30 |
31 int getFBOID() const { return fFBO; } | 31 int getFBOID() const { return fFBO; } |
32 | 32 |
33 const GrGLInterface* gl() const { return fGL; } | 33 const GrGLInterface* gl() const { return fGL; } |
34 | 34 |
35 virtual void makeCurrent() const = 0; | 35 virtual void makeCurrent() const = 0; |
36 | 36 |
37 bool hasExtension(const char* extensionName) const; | 37 bool hasExtension(const char* extensionName) const { |
| 38 GrAssert(NULL != fGL); |
| 39 return fExtensions.has(extensionName); |
| 40 } |
38 | 41 |
39 protected: | 42 protected: |
40 /** | 43 /** |
41 * Subclass implements this to make a GL context. The returned GrGLInterface | 44 * Subclass implements this to make a GL context. The returned GrGLInterface |
42 * should be populated with functions compatible with the context. The | 45 * should be populated with functions compatible with the context. The |
43 * format and size of backbuffers does not matter since an FBO will be | 46 * format and size of backbuffers does not matter since an FBO will be |
44 * created. | 47 * created. |
45 */ | 48 */ |
46 virtual const GrGLInterface* createGLContext() = 0; | 49 virtual const GrGLInterface* createGLContext() = 0; |
47 | 50 |
48 /** | 51 /** |
49 * Subclass should destroy the underlying GL context. | 52 * Subclass should destroy the underlying GL context. |
50 */ | 53 */ |
51 virtual void destroyGLContext() = 0; | 54 virtual void destroyGLContext() = 0; |
52 | 55 |
53 private: | 56 private: |
54 SkString fExtensionString; | 57 GrGLExtensions fExtensions; |
55 GrGLuint fFBO; | 58 GrGLuint fFBO; |
56 GrGLuint fColorBufferID; | 59 GrGLuint fColorBufferID; |
57 GrGLuint fDepthStencilBufferID; | 60 GrGLuint fDepthStencilBufferID; |
58 const GrGLInterface* fGL; | 61 const GrGLInterface* fGL; |
59 | 62 |
60 typedef SkRefCnt INHERITED; | 63 typedef SkRefCnt INHERITED; |
61 }; | 64 }; |
62 | 65 |
63 /** | 66 /** |
64 * Helper macros for using the GL context through the GrGLInterface. Example: | 67 * Helper macros for using the GL context through the GrGLInterface. Example: |
65 * SK_GL(glCtx, GenTextures(1, &texID)); | 68 * SK_GL(glCtx, GenTextures(1, &texID)); |
66 */ | 69 */ |
67 #define SK_GL(ctx, X) (ctx).gl()->f ## X; \ | 70 #define SK_GL(ctx, X) (ctx).gl()->f ## X; \ |
68 SkASSERT(GR_GL_NO_ERROR == (ctx).gl()->fGetError()) | 71 SkASSERT(GR_GL_NO_ERROR == (ctx).gl()->fGetError()) |
69 #define SK_GL_RET(ctx, RET, X) (RET) = (ctx).gl()->f ## X; \ | 72 #define SK_GL_RET(ctx, RET, X) (RET) = (ctx).gl()->f ## X; \ |
70 SkASSERT(GR_GL_NO_ERROR == (ctx).gl()->fGetError()) | 73 SkASSERT(GR_GL_NO_ERROR == (ctx).gl()->fGetError()) |
71 #define SK_GL_NOERRCHECK(ctx, X) (ctx).gl()->f ## X | 74 #define SK_GL_NOERRCHECK(ctx, X) (ctx).gl()->f ## X |
72 #define SK_GL_RET_NOERRCHECK(ctx, RET, X) (RET) = (ctx).gl()->f ## X | 75 #define SK_GL_RET_NOERRCHECK(ctx, RET, X) (RET) = (ctx).gl()->f ## X |
73 | 76 |
74 #endif | 77 #endif |
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