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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrGLTexture_DEFINED
#define GrGLTexture_DEFINED
#include "GrGpu.h"
#include "GrTexture.h"
#include "GrGLUtil.h"
/**
* A ref counted tex id that deletes the texture in its destructor.
*/
class GrGLTexID : public SkRefCnt {
public:
SK_DECLARE_INST_COUNT(GrGLTexID)
GrGLTexID(const GrGLInterface* gl, GrGLuint texID, bool isWrapped)
: fGL(gl)
, fTexID(texID)
, fIsWrapped(isWrapped) {
}
virtual ~GrGLTexID() {
if (0 != fTexID && !fIsWrapped) {
GR_GL_CALL(fGL, DeleteTextures(1, &fTexID));
}
}
void abandon() { fTexID = 0; }
GrGLuint id() const { return fTexID; }
private:
const GrGLInterface* fGL;
GrGLuint fTexID;
bool fIsWrapped;
typedef SkRefCnt INHERITED;
};
////////////////////////////////////////////////////////////////////////////////
class GrGLTexture : public GrTexture {
public:
struct TexParams {
GrGLenum fMinFilter;
GrGLenum fMagFilter;
GrGLenum fWrapS;
GrGLenum fWrapT;
GrGLenum fSwizzleRGBA[4];
void invalidate() { memset(this, 0xff, sizeof(TexParams)); }
};
struct IDDesc {
GrGLuint fTextureID;
bool fIsWrapped;
};
GrGLTexture(GrGpuGL*, const GrSurfaceDesc&, const IDDesc&);
virtual ~GrGLTexture() { this->release(); }
virtual GrBackendObject getTextureHandle() const SK_OVERRIDE;
virtual void textureParamsModified() SK_OVERRIDE { fTexParams.invalidate(); }
// These functions are used to track the texture parameters associated with the texture.
const TexParams& getCachedTexParams(GrGpu::ResetTimestamp* timestamp) const {
*timestamp = fTexParamsTimestamp;
return fTexParams;
}
void setCachedTexParams(const TexParams& texParams,
GrGpu::ResetTimestamp timestamp) {
fTexParams = texParams;
fTexParamsTimestamp = timestamp;
}
GrGLuint textureID() const { return (fTexIDObj.get()) ? fTexIDObj->id() : 0; }
protected:
// The public constructor registers this object with the cache. However, only the most derived
// class should register with the cache. This constructor does not do the registration and
// rather moves that burden onto the derived class.
enum Derived { kDerived };
GrGLTexture(GrGpuGL*, const GrSurfaceDesc&, const IDDesc&, Derived);
void init(const GrSurfaceDesc&, const IDDesc&);
virtual void onAbandon() SK_OVERRIDE;
virtual void onRelease() SK_OVERRIDE;
private:
TexParams fTexParams;
GrGpu::ResetTimestamp fTexParamsTimestamp;
SkAutoTUnref<GrGLTexID> fTexIDObj;
typedef GrTexture INHERITED;
};
#endif
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