118 lines
2.9 KiB
C++
118 lines
2.9 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 GrTexture_DEFINED
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#define GrTexture_DEFINED
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#include "GrSurface.h"
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#include "SkPoint.h"
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#include "SkRefCnt.h"
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class GrResourceKey;
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class GrTextureParams;
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class GrTexturePriv;
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class GrTexture : virtual public GrSurface {
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public:
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/**
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* Approximate number of bytes used by the texture
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*/
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virtual size_t gpuMemorySize() const SK_OVERRIDE;
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virtual GrTexture* asTexture() SK_OVERRIDE { return this; }
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virtual const GrTexture* asTexture() const SK_OVERRIDE { return this; }
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/**
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* Return the native ID or handle to the texture, depending on the
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* platform. e.g. on OpenGL, return the texture ID.
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*/
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virtual GrBackendObject getTextureHandle() const = 0;
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/**
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* This function indicates that the texture parameters (wrap mode, filtering, ...) have been
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* changed externally to Skia.
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*/
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virtual void textureParamsModified() = 0;
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#ifdef SK_DEBUG
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void validate() const {
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this->INHERITED::validate();
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this->validateDesc();
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}
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#endif
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/** Access methods that are only to be used within Skia code. */
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inline GrTexturePriv texturePriv();
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inline const GrTexturePriv texturePriv() const;
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protected:
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GrTexture(GrGpu* gpu, bool isWrapped, const GrSurfaceDesc& desc);
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void validateDesc() const;
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private:
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void dirtyMipMaps(bool mipMapsDirty);
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enum MipMapsStatus {
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kNotAllocated_MipMapsStatus,
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kAllocated_MipMapsStatus,
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kValid_MipMapsStatus
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};
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MipMapsStatus fMipMapsStatus;
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// These two shift a fixed-point value into normalized coordinates
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// for this texture if the texture is power of two sized.
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int fShiftFixedX;
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int fShiftFixedY;
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friend class GrTexturePriv;
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typedef GrSurface INHERITED;
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};
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/**
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* Represents a texture that is intended to be accessed in device coords with an offset.
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*/
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class GrDeviceCoordTexture {
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public:
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GrDeviceCoordTexture() { fOffset.set(0, 0); }
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GrDeviceCoordTexture(const GrDeviceCoordTexture& other) {
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*this = other;
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}
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GrDeviceCoordTexture(GrTexture* texture, const SkIPoint& offset)
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: fTexture(SkSafeRef(texture))
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, fOffset(offset) {
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}
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GrDeviceCoordTexture& operator=(const GrDeviceCoordTexture& other) {
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fTexture.reset(SkSafeRef(other.fTexture.get()));
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fOffset = other.fOffset;
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return *this;
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}
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const SkIPoint& offset() const { return fOffset; }
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void setOffset(const SkIPoint& offset) { fOffset = offset; }
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void setOffset(int ox, int oy) { fOffset.set(ox, oy); }
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GrTexture* texture() const { return fTexture.get(); }
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GrTexture* setTexture(GrTexture* texture) {
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fTexture.reset(SkSafeRef(texture));
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return texture;
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}
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private:
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SkAutoTUnref<GrTexture> fTexture;
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SkIPoint fOffset;
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};
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#endif
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