gecko/dom/canvas/DocumentRendererParent.cpp

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2012-05-21 04:12:37 -07:00
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/gfx/2D.h"
#include "mozilla/ipc/DocumentRendererParent.h"
#include "mozilla/RefPtr.h"
#include "gfxPattern.h"
#include "nsICanvasRenderingContextInternal.h"
using namespace mozilla;
using namespace mozilla::gfx;
using namespace mozilla::ipc;
DocumentRendererParent::DocumentRendererParent()
{}
DocumentRendererParent::~DocumentRendererParent()
{}
void DocumentRendererParent::SetCanvasContext(nsICanvasRenderingContextInternal* aCanvas,
gfxContext* ctx)
{
mCanvas = aCanvas;
mCanvasContext = ctx;
}
void DocumentRendererParent::DrawToCanvas(const nsIntSize& aSize,
const nsCString& aData)
{
if (!mCanvas || !mCanvasContext)
return;
RefPtr<DataSourceSurface> dataSurface =
Factory::CreateWrappingDataSourceSurface(reinterpret_cast<uint8_t*>(const_cast<nsCString&>(aData).BeginWriting()),
aSize.width * 4,
IntSize(aSize.width, aSize.height),
SurfaceFormat::B8G8R8A8);
nsRefPtr<gfxPattern> pat = new gfxPattern(dataSurface, Matrix());
gfxRect rect(gfxPoint(0, 0), gfxSize(aSize.width, aSize.height));
mCanvasContext->NewPath();
mCanvasContext->PixelSnappedRectangleAndSetPattern(rect, pat);
mCanvasContext->Fill();
// get rid of the pattern surface ref, because aData is very
// likely to go away shortly
mCanvasContext->SetColor(gfxRGBA(1,1,1,1));
gfxRect damageRect = mCanvasContext->UserToDevice(rect);
mCanvas->Redraw(damageRect);
}
void
DocumentRendererParent::ActorDestroy(ActorDestroyReason aWhy)
{
// Implement me! Bug 1005139
}
bool
DocumentRendererParent::Recv__delete__(const nsIntSize& renderedSize,
const nsCString& data)
{
DrawToCanvas(renderedSize, data);
return true;
}