michael@0: /*
michael@0:  * Copyright 2013 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #ifndef GrGLContext_DEFINED
michael@0: #define GrGLContext_DEFINED
michael@0: 
michael@0: #include "gl/GrGLExtensions.h"
michael@0: #include "gl/GrGLInterface.h"
michael@0: #include "GrGLCaps.h"
michael@0: #include "GrGLSL.h"
michael@0: #include "GrGLUtil.h"
michael@0: 
michael@0: #include "SkString.h"
michael@0: 
michael@0: /**
michael@0:  * Encapsulates information about an OpenGL context including the OpenGL
michael@0:  * version, the GrGLStandard type of the context, and GLSL version.
michael@0:  */
michael@0: class GrGLContextInfo {
michael@0: public:
michael@0:     /**
michael@0:      * Default constructor
michael@0:      */
michael@0:     GrGLContextInfo() {
michael@0:         fGLCaps.reset(SkNEW(GrGLCaps));
michael@0:         this->reset();
michael@0:     }
michael@0: 
michael@0:     GrGLContextInfo(const GrGLContextInfo& that) {
michael@0:         fGLCaps.reset(SkNEW(GrGLCaps));
michael@0:         *this = that;
michael@0:     }
michael@0: 
michael@0:     GrGLContextInfo& operator= (const GrGLContextInfo&);
michael@0: 
michael@0:     /**
michael@0:      * Initializes a GrGLContextInfo from a GrGLInterface and the currently
michael@0:      * bound OpenGL context accessible by the GrGLInterface.
michael@0:      */
michael@0:     bool initialize(const GrGLInterface* interface);
michael@0:     bool isInitialized() const;
michael@0: 
michael@0:     GrGLStandard standard() const { return fInterface->fStandard; }
michael@0:     GrGLVersion version() const { return fGLVersion; }
michael@0:     GrGLSLGeneration glslGeneration() const { return fGLSLGeneration; }
michael@0:     GrGLVendor vendor() const { return fVendor; }
michael@0:     GrGLRenderer renderer() const { return fRenderer; }
michael@0:     /** Is this a mesa-based driver. Does not mean it is the osmesa software rasterizer. */
michael@0:     bool isMesa() const { return fIsMesa; }
michael@0:     /** Are we running inside Chromium (using the command buffer)? We make some different tradeoffs
michael@0:         about what errors to check for because queries are synchronous. We should probably expose
michael@0:         this as an option for clients other than Chromium. */
michael@0:     bool isChromium() const { return fIsChromium; }
michael@0:     const GrGLCaps* caps() const { return fGLCaps.get(); }
michael@0:     GrGLCaps* caps() { return fGLCaps; }
michael@0:     bool hasExtension(const char* ext) const {
michael@0:         if (!this->isInitialized()) {
michael@0:             return false;
michael@0:         }
michael@0:         return fInterface->hasExtension(ext);
michael@0:     }
michael@0: 
michael@0:     /**
michael@0:      * Reset the information
michael@0:      */
michael@0:     void reset();
michael@0: 
michael@0: protected:
michael@0:     SkAutoTUnref<const GrGLInterface>   fInterface;
michael@0:     GrGLVersion                         fGLVersion;
michael@0:     GrGLSLGeneration                    fGLSLGeneration;
michael@0:     GrGLVendor                          fVendor;
michael@0:     GrGLRenderer                        fRenderer;
michael@0:     bool                                fIsMesa;
michael@0:     bool                                fIsChromium;
michael@0:     SkAutoTUnref<GrGLCaps>              fGLCaps;
michael@0: };
michael@0: 
michael@0: /**
michael@0:  * Extension of GrGLContextInfo that also provides access to GrGLInterface.
michael@0:  */
michael@0: class GrGLContext : public GrGLContextInfo {
michael@0: public:
michael@0:     /**
michael@0:      * Creates a GrGLContext from a GrGLInterface and the currently
michael@0:      * bound OpenGL context accessible by the GrGLInterface.
michael@0:      */
michael@0:     explicit GrGLContext(const GrGLInterface* interface) {
michael@0:         this->initialize(interface);
michael@0:     }
michael@0: 
michael@0:     GrGLContext(const GrGLContext& that) : INHERITED(that) {}
michael@0: 
michael@0:     GrGLContext& operator= (const GrGLContext& that) {
michael@0:         this->INHERITED::operator=(that);
michael@0:         return *this;
michael@0:     }
michael@0: 
michael@0:     const GrGLInterface* interface() const { return fInterface.get(); }
michael@0: 
michael@0: private:
michael@0:     typedef GrGLContextInfo INHERITED;
michael@0: };
michael@0: 
michael@0: #endif