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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkImage_Base.h"
#include "SkBitmap.h"
#include "SkData.h"
#include "SkImageCacherator.h"
#include "SkImagePriv.h"
#include "SkPixelRef.h"
#include "SkSurface.h"
class SkImage_Generator : public SkImage_Base {
public:
SkImage_Generator(SkImageCacherator* cache)
: INHERITED(cache->info().width(), cache->info().height(), kNeedNewImageUniqueID, NULL)
, fCache(cache) // take ownership
{}
SkSurface* onNewSurface(const SkImageInfo&, const SkSurfaceProps&) const override;
bool onReadPixels(const SkImageInfo&, void*, size_t, int srcX, int srcY) const override;
const void* onPeekPixels(SkImageInfo*, size_t* /*rowBytes*/) const override;
SkData* onRefEncoded() const override;
bool isOpaque() const override { return fCache->info().isOpaque(); }
bool getROPixels(SkBitmap*) const override;
GrTexture* asTextureRef(GrContext*, SkImageUsageType) const override;
SkShader* onNewShader(SkShader::TileMode,
SkShader::TileMode,
const SkMatrix* localMatrix) const override;
bool onIsLazyGenerated() const override { return true; }
private:
SkAutoTDelete<SkImageCacherator> fCache;
typedef SkImage_Base INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
SkShader* SkImage_Generator::onNewShader(SkShader::TileMode tileX, SkShader::TileMode tileY,
const SkMatrix* localMatrix) const {
// TODO: need a native Shader that takes Cacherator (or this image) so we can natively return
// textures as output from the shader.
SkBitmap bm;
if (this->getROPixels(&bm)) {
return SkShader::CreateBitmapShader(bm, tileX, tileY, localMatrix);
}
return nullptr;
}
SkSurface* SkImage_Generator::onNewSurface(const SkImageInfo& info,
const SkSurfaceProps& props) const {
return SkSurface::NewRaster(info, &props);
}
bool SkImage_Generator::onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRB,
int srcX, int srcY) const {
SkBitmap bm;
if (this->getROPixels(&bm)) {
return bm.readPixels(dstInfo, dstPixels, dstRB, srcX, srcY);
}
return false;
}
const void* SkImage_Generator::onPeekPixels(SkImageInfo* infoPtr, size_t* rowBytesPtr) const {
return NULL;
}
SkData* SkImage_Generator::onRefEncoded() const {
return fCache->refEncoded();
}
bool SkImage_Generator::getROPixels(SkBitmap* bitmap) const {
return fCache->lockAsBitmap(bitmap);
}
GrTexture* SkImage_Generator::asTextureRef(GrContext* ctx, SkImageUsageType usage) const {
return fCache->lockAsTexture(ctx, usage);
}
#ifndef SK_SUPPORT_LEGACY_NEWFROMGENERATOR
SkImage* SkImage::NewFromGenerator(SkImageGenerator* generator, const SkIRect* subset) {
SkImageCacherator* cache = SkImageCacherator::NewFromGenerator(generator, subset);
if (!cache) {
return nullptr;
}
return SkNEW_ARGS(SkImage_Generator, (cache));
}
#endif
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