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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(GrGLStandard forcedGpuAPI, const int width, const int height); | 28 bool init(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(GrGLStandard forcedGpuAPI) = 0; | 60 virtual const GrGLInterface* createGLContext() = 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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