The Tor Browser: content/canvas/src/DocumentRendererParent.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 #include "mozilla/ipc/DocumentRendererParent.h"

     6 #include "gfxImageSurface.h"

     7 #include "gfxPattern.h"

     8 #include "nsICanvasRenderingContextInternal.h"

    10 using namespace mozilla::ipc;

    12 DocumentRendererParent::DocumentRendererParent()

    13 {}

    15 DocumentRendererParent::~DocumentRendererParent()

    16 {}

    18 void DocumentRendererParent::SetCanvasContext(nsICanvasRenderingContextInternal* aCanvas,

    19                                               gfxContext* ctx)

    20 {

    21     mCanvas = aCanvas;

    22     mCanvasContext = ctx;

    23 }

    25 void DocumentRendererParent::DrawToCanvas(const nsIntSize& aSize,

    26                                           const nsCString& aData)

    27 {

    28     if (!mCanvas || !mCanvasContext)

    29         return;

    31     nsRefPtr<gfxImageSurface> surf =

    32         new gfxImageSurface(reinterpret_cast<uint8_t*>(const_cast<nsCString&>(aData).BeginWriting()),

    33                             gfxIntSize(aSize.width, aSize.height),

    34                             aSize.width * 4,

    35                             gfxImageFormat::ARGB32);

    36     nsRefPtr<gfxPattern> pat = new gfxPattern(surf);

    38     gfxRect rect(gfxPoint(0, 0), gfxSize(aSize.width, aSize.height));

    39     mCanvasContext->NewPath();

    40     mCanvasContext->PixelSnappedRectangleAndSetPattern(rect, pat);

    41     mCanvasContext->Fill();

    43     // get rid of the pattern surface ref, because aData is very

    44     // likely to go away shortly

    45     mCanvasContext->SetColor(gfxRGBA(1,1,1,1));

    47     gfxRect damageRect = mCanvasContext->UserToDevice(rect);

    48     mCanvas->Redraw(damageRect);

    49 }

    51 bool

    52 DocumentRendererParent::Recv__delete__(const nsIntSize& renderedSize,

    53                                        const nsCString& data)

    54 {

    55     DrawToCanvas(renderedSize, data);

    56     return true;

    57 }

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