michael@0: /*
michael@0:  * Copyright 2011 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 GrGLTexture_DEFINED
michael@0: #define GrGLTexture_DEFINED
michael@0: 
michael@0: #include "GrGpu.h"
michael@0: #include "GrGLRenderTarget.h"
michael@0: 
michael@0: /**
michael@0:  * A ref counted tex id that deletes the texture in its destructor.
michael@0:  */
michael@0: class GrGLTexID : public SkRefCnt {
michael@0: public:
michael@0:     SK_DECLARE_INST_COUNT(GrGLTexID)
michael@0: 
michael@0:     GrGLTexID(const GrGLInterface* gl, GrGLuint texID, bool isWrapped)
michael@0:         : fGL(gl)
michael@0:         , fTexID(texID)
michael@0:         , fIsWrapped(isWrapped) {
michael@0:     }
michael@0: 
michael@0:     virtual ~GrGLTexID() {
michael@0:         if (0 != fTexID && !fIsWrapped) {
michael@0:             GR_GL_CALL(fGL, DeleteTextures(1, &fTexID));
michael@0:         }
michael@0:     }
michael@0: 
michael@0:     void abandon() { fTexID = 0; }
michael@0:     GrGLuint id() const { return fTexID; }
michael@0: 
michael@0: private:
michael@0:     const GrGLInterface* fGL;
michael@0:     GrGLuint             fTexID;
michael@0:     bool                 fIsWrapped;
michael@0: 
michael@0:     typedef SkRefCnt INHERITED;
michael@0: };
michael@0: 
michael@0: ////////////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: 
michael@0: class GrGLTexture : public GrTexture {
michael@0: 
michael@0: public:
michael@0:     struct TexParams {
michael@0:         GrGLenum fMinFilter;
michael@0:         GrGLenum fMagFilter;
michael@0:         GrGLenum fWrapS;
michael@0:         GrGLenum fWrapT;
michael@0:         GrGLenum fSwizzleRGBA[4];
michael@0:         void invalidate() { memset(this, 0xff, sizeof(TexParams)); }
michael@0:     };
michael@0: 
michael@0:     struct Desc : public GrTextureDesc {
michael@0:         GrGLuint        fTextureID;
michael@0:         bool            fIsWrapped;
michael@0:     };
michael@0: 
michael@0:     // creates a texture that is also an RT
michael@0:     GrGLTexture(GrGpuGL* gpu,
michael@0:                 const Desc& textureDesc,
michael@0:                 const GrGLRenderTarget::Desc& rtDesc);
michael@0: 
michael@0:     // creates a non-RT texture
michael@0:     GrGLTexture(GrGpuGL* gpu,
michael@0:                 const Desc& textureDesc);
michael@0: 
michael@0:     virtual ~GrGLTexture() { this->release(); }
michael@0: 
michael@0:     virtual GrBackendObject getTextureHandle() const SK_OVERRIDE;
michael@0: 
michael@0:     virtual void invalidateCachedState() SK_OVERRIDE { fTexParams.invalidate(); }
michael@0: 
michael@0:     // These functions are used to track the texture parameters associated with the texture.
michael@0:     const TexParams& getCachedTexParams(GrGpu::ResetTimestamp* timestamp) const {
michael@0:         *timestamp = fTexParamsTimestamp;
michael@0:         return fTexParams;
michael@0:     }
michael@0: 
michael@0:     void setCachedTexParams(const TexParams& texParams,
michael@0:                             GrGpu::ResetTimestamp timestamp) {
michael@0:         fTexParams = texParams;
michael@0:         fTexParamsTimestamp = timestamp;
michael@0:     }
michael@0: 
michael@0:     GrGLuint textureID() const { return (NULL != fTexIDObj.get()) ? fTexIDObj->id() : 0; }
michael@0: 
michael@0: protected:
michael@0:     // overrides of GrTexture
michael@0:     virtual void onAbandon() SK_OVERRIDE;
michael@0:     virtual void onRelease() SK_OVERRIDE;
michael@0: 
michael@0: private:
michael@0:     TexParams                       fTexParams;
michael@0:     GrGpu::ResetTimestamp           fTexParamsTimestamp;
michael@0:     SkAutoTUnref<GrGLTexID>         fTexIDObj;
michael@0: 
michael@0:     void init(GrGpuGL* gpu,
michael@0:               const Desc& textureDesc,
michael@0:               const GrGLRenderTarget::Desc* rtDesc);
michael@0: 
michael@0:     typedef GrTexture INHERITED;
michael@0: };
michael@0: 
michael@0: #endif