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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 GrTexture_DEFINED
#define GrTexture_DEFINED
#include "GrSurface.h"
#include "GrRenderTarget.h"
#include "SkPoint.h"
#include "SkRefCnt.h"
class GrResourceKey;
class GrTextureParams;
class GrTexturePriv;
class GrTexture : public GrSurface {
public:
/**
* Approximate number of bytes used by the texture
*/
virtual size_t gpuMemorySize() const SK_OVERRIDE;
virtual GrTexture* asTexture() SK_OVERRIDE { return this; }
virtual const GrTexture* asTexture() const SK_OVERRIDE { return this; }
virtual GrRenderTarget* asRenderTarget() SK_OVERRIDE { return fRenderTarget.get(); }
virtual const GrRenderTarget* asRenderTarget() const SK_OVERRIDE { return fRenderTarget.get(); }
/**
* Return the native ID or handle to the texture, depending on the
* platform. e.g. on OpenGL, return the texture ID.
*/
virtual GrBackendObject getTextureHandle() const = 0;
/**
* This function indicates that the texture parameters (wrap mode, filtering, ...) have been
* changed externally to Skia.
*/
virtual void textureParamsModified() = 0;
#ifdef SK_DEBUG
void validate() const {
this->INHERITED::validate();
this->validateDesc();
}
#endif
/** Access methods that are only to be used within Skia code. */
inline GrTexturePriv texturePriv();
inline const GrTexturePriv texturePriv() const;
protected:
// A texture refs its rt representation but not vice-versa. It is up to
// the subclass constructor to initialize this pointer.
SkAutoTUnref<GrRenderTarget> fRenderTarget;
GrTexture(GrGpu* gpu, bool isWrapped, const GrTextureDesc& desc);
virtual ~GrTexture();
// GrResource overrides
virtual void onRelease() SK_OVERRIDE;
virtual void onAbandon() SK_OVERRIDE;
void validateDesc() const;
private:
void dirtyMipMaps(bool mipMapsDirty);
enum MipMapsStatus {
kNotAllocated_MipMapsStatus,
kAllocated_MipMapsStatus,
kValid_MipMapsStatus
};
MipMapsStatus fMipMapsStatus;
// These two shift a fixed-point value into normalized coordinates
// for this texture if the texture is power of two sized.
int fShiftFixedX;
int fShiftFixedY;
friend class GrTexturePriv;
typedef GrSurface INHERITED;
};
/**
* Represents a texture that is intended to be accessed in device coords with an offset.
*/
class GrDeviceCoordTexture {
public:
GrDeviceCoordTexture() { fOffset.set(0, 0); }
GrDeviceCoordTexture(const GrDeviceCoordTexture& other) {
*this = other;
}
GrDeviceCoordTexture(GrTexture* texture, const SkIPoint& offset)
: fTexture(SkSafeRef(texture))
, fOffset(offset) {
}
GrDeviceCoordTexture& operator=(const GrDeviceCoordTexture& other) {
fTexture.reset(SkSafeRef(other.fTexture.get()));
fOffset = other.fOffset;
return *this;
}
const SkIPoint& offset() const { return fOffset; }
void setOffset(const SkIPoint& offset) { fOffset = offset; }
void setOffset(int ox, int oy) { fOffset.set(ox, oy); }
GrTexture* texture() const { return fTexture.get(); }
GrTexture* setTexture(GrTexture* texture) {
fTexture.reset(SkSafeRef(texture));
return texture;
}
private:
SkAutoTUnref<GrTexture> fTexture;
SkIPoint fOffset;
};
#endif
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