gfx/skia/trunk/include/gpu/gl/SkGLContextHelper.h@deefc01c0e14 (annotated)
gfx/skia/trunk/include/gpu/gl/SkGLContextHelper.h
Thu, 15 Jan 2015 21:03:48 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 15 Jan 2015 21:03:48 +0100
- branch
- TOR_BUG_9701
- changeset 11
- deefc01c0e14
- permissions
- -rw-r--r--
Integrate friendly tips from Tor colleagues to make (or not) 4.5 alpha 3;
This includes removal of overloaded (but unused) methods, and addition of
a overlooked call to DataStruct::SetData(nsISupports, uint32_t, bool.)
| michael@0 | 1 | |
| michael@0 | 2 | /* |
| michael@0 | 3 | * Copyright 2013 Google Inc. |
| michael@0 | 4 | * |
| michael@0 | 5 | * Use of this source code is governed by a BSD-style license that can be |
| michael@0 | 6 | * found in the LICENSE file. |
| michael@0 | 7 | */ |
| michael@0 | 8 | #ifndef SkGLContextHelper_DEFINED |
| michael@0 | 9 | #define SkGLContextHelper_DEFINED |
| michael@0 | 10 | |
| michael@0 | 11 | #include "GrGLInterface.h" |
| michael@0 | 12 | |
| michael@0 | 13 | /** |
| michael@0 | 14 | * Create an offscreen opengl context with an RGBA8 / 8bit stencil FBO. |
| michael@0 | 15 | * Provides a GrGLInterface struct of function pointers for the context. |
| michael@0 | 16 | */ |
| michael@0 | 17 | |
| michael@0 | 18 | class SK_API SkGLContextHelper : public SkRefCnt { |
| michael@0 | 19 | public: |
| michael@0 | 20 | SK_DECLARE_INST_COUNT(SkGLContextHelper) |
| michael@0 | 21 | |
| michael@0 | 22 | SkGLContextHelper(); |
| michael@0 | 23 | virtual ~SkGLContextHelper(); |
| michael@0 | 24 | |
| michael@0 | 25 | /** |
| michael@0 | 26 | * Initializes the context and makes it current. |
| michael@0 | 27 | */ |
| michael@0 | 28 | bool init(const int width, const int height); |
| michael@0 | 29 | |
| michael@0 | 30 | int getFBOID() const { return fFBO; } |
| michael@0 | 31 | |
| michael@0 | 32 | const GrGLInterface* gl() const { return fGL; } |
| michael@0 | 33 | |
| michael@0 | 34 | virtual void makeCurrent() const = 0; |
| michael@0 | 35 | |
| michael@0 | 36 | /** |
| michael@0 | 37 | * The primary purpose of this function it to provide a means of scheduling |
| michael@0 | 38 | * work on the GPU (since all of the subclasses create primary buffers for |
| michael@0 | 39 | * testing that are small and not meant to be rendered to the screen). |
| michael@0 | 40 | * |
| michael@0 | 41 | * If the drawing surface provided by the platform is double buffered this |
| michael@0 | 42 | * call will cause the platform to swap which buffer is currently being |
| michael@0 | 43 | * targeted. If the current surface does not include a back buffer, this |
| michael@0 | 44 | * call has no effect. |
| michael@0 | 45 | */ |
| michael@0 | 46 | virtual void swapBuffers() const = 0; |
| michael@0 | 47 | |
| michael@0 | 48 | bool hasExtension(const char* extensionName) const { |
| michael@0 | 49 | SkASSERT(NULL != fGL); |
| michael@0 | 50 | return fGL->hasExtension(extensionName); |
| michael@0 | 51 | } |
| michael@0 | 52 | |
| michael@0 | 53 | protected: |
| michael@0 | 54 | /** |
| michael@0 | 55 | * Subclass implements this to make a GL context. The returned GrGLInterface |
| michael@0 | 56 | * should be populated with functions compatible with the context. The |
| michael@0 | 57 | * format and size of backbuffers does not matter since an FBO will be |
| michael@0 | 58 | * created. |
| michael@0 | 59 | */ |
| michael@0 | 60 | virtual const GrGLInterface* createGLContext() = 0; |
| michael@0 | 61 | |
| michael@0 | 62 | /** |
| michael@0 | 63 | * Subclass should destroy the underlying GL context. |
| michael@0 | 64 | */ |
| michael@0 | 65 | virtual void destroyGLContext() = 0; |
| michael@0 | 66 | |
| michael@0 | 67 | private: |
| michael@0 | 68 | GrGLuint fFBO; |
| michael@0 | 69 | GrGLuint fColorBufferID; |
| michael@0 | 70 | GrGLuint fDepthStencilBufferID; |
| michael@0 | 71 | const GrGLInterface* fGL; |
| michael@0 | 72 | |
| michael@0 | 73 | typedef SkRefCnt INHERITED; |
| michael@0 | 74 | }; |
| michael@0 | 75 | |
| michael@0 | 76 | /** |
| michael@0 | 77 | * Helper macros for using the GL context through the GrGLInterface. Example: |
| michael@0 | 78 | * SK_GL(glCtx, GenTextures(1, &texID)); |
| michael@0 | 79 | */ |
| michael@0 | 80 | #define SK_GL(ctx, X) (ctx).gl()->fFunctions.f ## X; \ |
| michael@0 | 81 | SkASSERT(GR_GL_NO_ERROR == (ctx).gl()->fFunctions.fGetError()) |
| michael@0 | 82 | #define SK_GL_RET(ctx, RET, X) (RET) = (ctx).gl()->fFunctions.f ## X; \ |
| michael@0 | 83 | SkASSERT(GR_GL_NO_ERROR == (ctx).gl()->fFunctions.fGetError()) |
| michael@0 | 84 | #define SK_GL_NOERRCHECK(ctx, X) (ctx).gl()->fFunctions.f ## X |
| michael@0 | 85 | #define SK_GL_RET_NOERRCHECK(ctx, RET, X) (RET) = (ctx).gl()->fFunctions.f ## X |
| michael@0 | 86 | |
| michael@0 | 87 | #endif |
