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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkSurface_Base.h"
#include "SkImagePriv.h"
#include "SkCanvas.h"
#include "SkGpuDevice.h"
class SkSurface_Gpu : public SkSurface_Base {
public:
SK_DECLARE_INST_COUNT(SkSurface_Gpu)
SkSurface_Gpu(GrRenderTarget*);
virtual ~SkSurface_Gpu();
virtual SkCanvas* onNewCanvas() SK_OVERRIDE;
virtual SkSurface* onNewSurface(const SkImageInfo&) SK_OVERRIDE;
virtual SkImage* onNewImageSnapshot() SK_OVERRIDE;
virtual void onDraw(SkCanvas*, SkScalar x, SkScalar y,
const SkPaint*) SK_OVERRIDE;
virtual void onCopyOnWrite(ContentChangeMode) SK_OVERRIDE;
private:
SkGpuDevice* fDevice;
typedef SkSurface_Base INHERITED;
};
///////////////////////////////////////////////////////////////////////////////
SkSurface_Gpu::SkSurface_Gpu(GrRenderTarget* renderTarget)
: INHERITED(renderTarget->width(), renderTarget->height()) {
fDevice = SkNEW_ARGS(SkGpuDevice, (renderTarget->getContext(), renderTarget));
if (kRGB_565_GrPixelConfig != renderTarget->config()) {
fDevice->clear(0x0);
}
}
SkSurface_Gpu::~SkSurface_Gpu() {
SkSafeUnref(fDevice);
}
SkCanvas* SkSurface_Gpu::onNewCanvas() {
return SkNEW_ARGS(SkCanvas, (fDevice));
}
SkSurface* SkSurface_Gpu::onNewSurface(const SkImageInfo& info) {
GrRenderTarget* rt = fDevice->accessRenderTarget();
int sampleCount = rt->numSamples();
return SkSurface::NewRenderTarget(fDevice->context(), info, sampleCount);
}
SkImage* SkSurface_Gpu::onNewImageSnapshot() {
return SkImage::NewTexture(fDevice->accessBitmap(false));
}
void SkSurface_Gpu::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y,
const SkPaint* paint) {
canvas->drawBitmap(fDevice->accessBitmap(false), x, y, paint);
}
// Create a new SkGpuDevice and, if necessary, copy the contents of the old
// device into it. Note that this flushes the SkGpuDevice but
// doesn't force an OpenGL flush.
void SkSurface_Gpu::onCopyOnWrite(ContentChangeMode mode) {
GrRenderTarget* rt = fDevice->accessRenderTarget();
// are we sharing our render target with the image?
SkASSERT(NULL != this->getCachedImage());
if (rt->asTexture() == SkTextureImageGetTexture(this->getCachedImage())) {
SkAutoTUnref<SkGpuDevice> newDevice(SkGpuDevice::Create(fDevice->context(),
fDevice->imageInfo(),
rt->numSamples()));
SkASSERT(newDevice.get());
if (kRetain_ContentChangeMode == mode) {
fDevice->context()->copyTexture(rt->asTexture(),
reinterpret_cast<GrRenderTarget*>(newDevice->accessRenderTarget()));
}
SkASSERT(NULL != this->getCachedCanvas());
SkASSERT(this->getCachedCanvas()->getDevice() == fDevice);
this->getCachedCanvas()->setRootDevice(newDevice);
SkRefCnt_SafeAssign(fDevice, newDevice.get());
}
}
///////////////////////////////////////////////////////////////////////////////
SkSurface* SkSurface::NewRenderTargetDirect(GrRenderTarget* target) {
if (NULL == target) {
return NULL;
}
return SkNEW_ARGS(SkSurface_Gpu, (target));
}
SkSurface* SkSurface::NewRenderTarget(GrContext* ctx, const SkImageInfo& info, int sampleCount) {
if (NULL == ctx) {
return NULL;
}
SkBitmap::Config config = SkImageInfoToBitmapConfig(info);
GrTextureDesc desc;
desc.fFlags = kRenderTarget_GrTextureFlagBit | kCheckAllocation_GrTextureFlagBit;
desc.fWidth = info.fWidth;
desc.fHeight = info.fHeight;
desc.fConfig = SkBitmapConfig2GrPixelConfig(config);
desc.fSampleCnt = sampleCount;
SkAutoTUnref<GrTexture> tex(ctx->createUncachedTexture(desc, NULL, 0));
if (NULL == tex) {
return NULL;
}
return SkNEW_ARGS(SkSurface_Gpu, (tex->asRenderTarget()));
}
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