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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 "GrGLInterface.h" | 11 #include "GrGLInterface.h" |
12 | 12 |
13 /** | 13 /** |
14 * Create an offscreen opengl context with an RGBA8 / 8bit stencil FBO. | 14 * Create an offscreen opengl context with an RGBA8 / 8bit stencil FBO. |
15 * Provides a GrGLInterface struct of function pointers for the context. | 15 * Provides a GrGLInterface struct of function pointers for the context. |
16 */ | 16 */ |
17 | 17 |
18 class SK_API SkGLContextHelper : public SkRefCnt { | 18 class SK_API SkGLContextHelper : public SkRefCnt { |
19 public: | 19 public: |
20 SK_DECLARE_INST_COUNT(SkGLContextHelper) | 20 SK_DECLARE_INST_COUNT(SkGLContextHelper) |
21 | 21 |
22 SkGLContextHelper(); | 22 SkGLContextHelper(); |
23 virtual ~SkGLContextHelper(); | 23 virtual ~SkGLContextHelper(); |
24 | 24 |
25 /** | 25 /** |
26 * Initializes the context and makes it current. | 26 * Initializes the context and makes it current. |
27 */ | 27 */ |
28 bool init(const int width, const int height); | 28 bool init(GrGLStandard forcedStandard, const int width, const int height); |
29 | 29 |
30 int getFBOID() const { return fFBO; } | 30 int getFBOID() const { return fFBO; } |
31 | 31 |
32 const GrGLInterface* gl() const { return fGL; } | 32 const GrGLInterface* gl() const { return fGL; } |
33 | 33 |
34 virtual void makeCurrent() const = 0; | 34 virtual void makeCurrent() const = 0; |
35 | 35 |
36 /** | 36 /** |
37 * The primary purpose of this function it to provide a means of scheduling | 37 * The primary purpose of this function it to provide a means of scheduling |
38 * work on the GPU (since all of the subclasses create primary buffers for | 38 * work on the GPU (since all of the subclasses create primary buffers for |
(...skipping 11 matching lines...) Expand all Loading... |
50 return fGL->hasExtension(extensionName); | 50 return fGL->hasExtension(extensionName); |
51 } | 51 } |
52 | 52 |
53 protected: | 53 protected: |
54 /** | 54 /** |
55 * Subclass implements this to make a GL context. The returned GrGLInterface | 55 * Subclass implements this to make a GL context. The returned GrGLInterface |
56 * should be populated with functions compatible with the context. The | 56 * should be populated with functions compatible with the context. The |
57 * 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 |
58 * created. | 58 * created. |
59 */ | 59 */ |
60 virtual const GrGLInterface* createGLContext() = 0; | 60 virtual const GrGLInterface* createGLContext(GrGLStandard forcedStandard) =
0; |
61 | 61 |
62 /** | 62 /** |
63 * Subclass should destroy the underlying GL context. | 63 * Subclass should destroy the underlying GL context. |
64 */ | 64 */ |
65 virtual void destroyGLContext() = 0; | 65 virtual void destroyGLContext() = 0; |
66 | 66 |
67 private: | 67 private: |
68 GrGLuint fFBO; | 68 GrGLuint fFBO; |
69 GrGLuint fColorBufferID; | 69 GrGLuint fColorBufferID; |
70 GrGLuint fDepthStencilBufferID; | 70 GrGLuint fDepthStencilBufferID; |
71 const GrGLInterface* fGL; | 71 const GrGLInterface* fGL; |
72 | 72 |
73 typedef SkRefCnt INHERITED; | 73 typedef SkRefCnt INHERITED; |
74 }; | 74 }; |
75 | 75 |
76 /** | 76 /** |
77 * Helper macros for using the GL context through the GrGLInterface. Example: | 77 * Helper macros for using the GL context through the GrGLInterface. Example: |
78 * SK_GL(glCtx, GenTextures(1, &texID)); | 78 * SK_GL(glCtx, GenTextures(1, &texID)); |
79 */ | 79 */ |
80 #define SK_GL(ctx, X) (ctx).gl()->fFunctions.f ## X; \ | 80 #define SK_GL(ctx, X) (ctx).gl()->fFunctions.f ## X; \ |
81 SkASSERT(GR_GL_NO_ERROR == (ctx).gl()->fFunctions.fGetErro
r()) | 81 SkASSERT(GR_GL_NO_ERROR == (ctx).gl()->fFunctions.fGetErro
r()) |
82 #define SK_GL_RET(ctx, RET, X) (RET) = (ctx).gl()->fFunctions.f ## X; \ | 82 #define SK_GL_RET(ctx, RET, X) (RET) = (ctx).gl()->fFunctions.f ## X; \ |
83 SkASSERT(GR_GL_NO_ERROR == (ctx).gl()->fFunctions.fGetError()) | 83 SkASSERT(GR_GL_NO_ERROR == (ctx).gl()->fFunctions.fGetError()) |
84 #define SK_GL_NOERRCHECK(ctx, X) (ctx).gl()->fFunctions.f ## X | 84 #define SK_GL_NOERRCHECK(ctx, X) (ctx).gl()->fFunctions.f ## X |
85 #define SK_GL_RET_NOERRCHECK(ctx, RET, X) (RET) = (ctx).gl()->fFunctions.f ## X | 85 #define SK_GL_RET_NOERRCHECK(ctx, RET, X) (RET) = (ctx).gl()->fFunctions.f ## X |
86 | 86 |
87 #endif | 87 #endif |
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