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/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file
*/
#include "SkCanvas.h"
#include "SkSpecialImage.h"
#include "SkSpecialSurface.h"
#include "SkSurfacePriv.h"
///////////////////////////////////////////////////////////////////////////////
class SkSpecialSurface_Base : public SkSpecialSurface {
public:
SkSpecialSurface_Base(const SkIRect& subset, const SkSurfaceProps* props)
: INHERITED(subset, props)
, fCanvas(nullptr) {
}
virtual ~SkSpecialSurface_Base() { }
// reset is called after an SkSpecialImage has been snapped
void reset() { fCanvas.reset(); }
// This can return nullptr if reset has already been called or something when wrong in the ctor
SkCanvas* onGetCanvas() { return fCanvas.get(); }
virtual sk_sp<SkSpecialImage> onMakeImageSnapshot() = 0;
protected:
std::unique_ptr<SkCanvas> fCanvas; // initialized by derived classes in ctors
private:
typedef SkSpecialSurface INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
static SkSpecialSurface_Base* as_SB(SkSpecialSurface* surface) {
return static_cast<SkSpecialSurface_Base*>(surface);
}
SkSpecialSurface::SkSpecialSurface(const SkIRect& subset,
const SkSurfaceProps* props)
: fProps(SkSurfacePropsCopyOrDefault(props).flags(), kUnknown_SkPixelGeometry)
, fSubset(subset) {
SkASSERT(fSubset.width() > 0);
SkASSERT(fSubset.height() > 0);
}
SkCanvas* SkSpecialSurface::getCanvas() {
return as_SB(this)->onGetCanvas();
}
sk_sp<SkSpecialImage> SkSpecialSurface::makeImageSnapshot() {
sk_sp<SkSpecialImage> image(as_SB(this)->onMakeImageSnapshot());
as_SB(this)->reset();
return image; // the caller gets the creation ref
}
///////////////////////////////////////////////////////////////////////////////
#include "SkMallocPixelRef.h"
class SkSpecialSurface_Raster : public SkSpecialSurface_Base {
public:
SkSpecialSurface_Raster(const SkImageInfo& info,
sk_sp<SkPixelRef> pr,
const SkIRect& subset,
const SkSurfaceProps* props)
: INHERITED(subset, props) {
SkASSERT(info.width() == pr->width() && info.height() == pr->height());
fBitmap.setInfo(info, info.minRowBytes());
fBitmap.setPixelRef(std::move(pr), 0, 0);
fCanvas.reset(new SkCanvas(fBitmap, this->props()));
fCanvas->clipRect(SkRect::Make(subset));
#ifdef SK_IS_BOT
fCanvas->clear(SK_ColorRED); // catch any imageFilter sloppiness
#endif
}
~SkSpecialSurface_Raster() override { }
sk_sp<SkSpecialImage> onMakeImageSnapshot() override {
return SkSpecialImage::MakeFromRaster(this->subset(), fBitmap, &this->props());
}
private:
SkBitmap fBitmap;
typedef SkSpecialSurface_Base INHERITED;
};
sk_sp<SkSpecialSurface> SkSpecialSurface::MakeFromBitmap(const SkIRect& subset, SkBitmap& bm,
const SkSurfaceProps* props) {
if (subset.isEmpty() || !SkSurfaceValidateRasterInfo(bm.info(), bm.rowBytes())) {
return nullptr;
}
return sk_make_sp<SkSpecialSurface_Raster>(bm.info(), sk_ref_sp(bm.pixelRef()), subset, props);
}
sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRaster(const SkImageInfo& info,
const SkSurfaceProps* props) {
if (!SkSurfaceValidateRasterInfo(info)) {
return nullptr;
}
sk_sp<SkPixelRef> pr = SkMallocPixelRef::MakeZeroed(info, 0);
if (!pr) {
return nullptr;
}
const SkIRect subset = SkIRect::MakeWH(info.width(), info.height());
return sk_make_sp<SkSpecialSurface_Raster>(info, std::move(pr), subset, props);
}
#if SK_SUPPORT_GPU
///////////////////////////////////////////////////////////////////////////////
#include "GrContext.h"
#include "SkGpuDevice.h"
class SkSpecialSurface_Gpu : public SkSpecialSurface_Base {
public:
SkSpecialSurface_Gpu(GrContext* context, sk_sp<GrRenderTargetContext> renderTargetContext,
int width, int height, const SkIRect& subset)
: INHERITED(subset, &renderTargetContext->surfaceProps())
, fRenderTargetContext(std::move(renderTargetContext)) {
sk_sp<SkBaseDevice> device(SkGpuDevice::Make(context, fRenderTargetContext, width, height,
SkGpuDevice::kUninit_InitContents));
if (!device) {
return;
}
fCanvas.reset(new SkCanvas(device.get()));
fCanvas->clipRect(SkRect::Make(subset));
#ifdef SK_IS_BOT
fCanvas->clear(SK_ColorRED); // catch any imageFilter sloppiness
#endif
}
~SkSpecialSurface_Gpu() override { }
sk_sp<SkSpecialImage> onMakeImageSnapshot() override {
if (!fRenderTargetContext->asTextureProxy()) {
return nullptr;
}
sk_sp<SkSpecialImage> tmp(SkSpecialImage::MakeDeferredFromGpu(
fCanvas->getGrContext(),
this->subset(),
kNeedNewImageUniqueID_SpecialImage,
fRenderTargetContext->asTextureProxyRef(),
fRenderTargetContext->refColorSpace(),
&this->props()));
fRenderTargetContext = nullptr;
return tmp;
}
private:
sk_sp<GrRenderTargetContext> fRenderTargetContext;
typedef SkSpecialSurface_Base INHERITED;
};
sk_sp<SkSpecialSurface> SkSpecialSurface::MakeRenderTarget(GrContext* context,
int width, int height,
GrPixelConfig config,
sk_sp<SkColorSpace> colorSpace) {
if (!context) {
return nullptr;
}
sk_sp<GrRenderTargetContext> renderTargetContext(context->makeDeferredRenderTargetContext(
SkBackingFit::kApprox, width, height, config, std::move(colorSpace)));
if (!renderTargetContext) {
return nullptr;
}
const SkIRect subset = SkIRect::MakeWH(width, height);
return sk_make_sp<SkSpecialSurface_Gpu>(context, std::move(renderTargetContext),
width, height, subset);
}
#endif
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