d92780b558
git-svn-id: http://skia.googlecode.com/svn/trunk@2511 2bbb7eff-a529-9590-31e7-b0007b416f81
57 lines
1.3 KiB
C++
57 lines
1.3 KiB
C++
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkGLContext_DEFINED
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#define SkGLContext_DEFINED
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#include "GrGLInterface.h"
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/**
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* Create an offscreen opengl context with an RGBA8 / 8bit stencil FBO.
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* Provides a GrGLInterface struct of function pointers for the context.
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*/
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class SkGLContext : public SkRefCnt {
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public:
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SkGLContext();
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virtual ~SkGLContext();
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bool init(const int width, const int height);
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int getFBOID() const { return fFBO; }
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const GrGLInterface* gl() const { return fGL; }
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virtual void makeCurrent() const = 0;
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protected:
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/**
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* Subclass implements this to make a GL context. The returned GrGLInterface
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* should be populated with functions compatible with the context. The
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* format and size of backbuffers does not matter since an FBO will be
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* created.
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*/
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virtual const GrGLInterface* createGLContext() = 0;
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/**
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* Subclass should destroy the underlying GL context.
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*/
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virtual void destroyGLContext() = 0;
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private:
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GrGLuint fFBO;
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const GrGLInterface* fGL;
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};
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/**
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* Helper macro for using the GL context through the GrGLInterface. Example:
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* SK_GL(glCtx, GenTextures(1, &texID));
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*/
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#define SK_GL(ctx, X) (ctx).gl()->f ## X
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#endif
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