gecko/gfx/ipc/SharedDIBSurface.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla Firefox.
*
* The Initial Developer of the Original Code is
* the Mozilla Foundation <http://www.mozilla.org>.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "SharedDIBSurface.h"
#include "cairo.h"
namespace mozilla {
namespace gfx {
static const cairo_user_data_key_t SHAREDDIB_KEY = {0};
static const long kBytesPerPixel = 4;
bool
SharedDIBSurface::Create(HDC adc, PRUint32 aWidth, PRUint32 aHeight,
bool aTransparent)
{
nsresult rv = mSharedDIB.Create(adc, aWidth, aHeight, aTransparent);
if (NS_FAILED(rv) || !mSharedDIB.IsValid())
return false;
InitSurface(aWidth, aHeight, aTransparent);
return true;
}
bool
SharedDIBSurface::Attach(Handle aHandle, PRUint32 aWidth, PRUint32 aHeight,
bool aTransparent)
{
nsresult rv = mSharedDIB.Attach(aHandle, aWidth, aHeight, aTransparent);
if (NS_FAILED(rv) || !mSharedDIB.IsValid())
return false;
InitSurface(aWidth, aHeight, aTransparent);
return true;
}
void
SharedDIBSurface::InitSurface(PRUint32 aWidth, PRUint32 aHeight,
bool aTransparent)
{
long stride = long(aWidth * kBytesPerPixel);
unsigned char* data = reinterpret_cast<unsigned char*>(mSharedDIB.GetBits());
gfxImageFormat format = aTransparent ? ImageFormatARGB32 : ImageFormatRGB24;
gfxImageSurface::InitWithData(data, gfxIntSize(aWidth, aHeight),
stride, format);
cairo_surface_set_user_data(mSurface, &SHAREDDIB_KEY, this, NULL);
}
bool
SharedDIBSurface::IsSharedDIBSurface(gfxASurface* aSurface)
{
return aSurface &&
aSurface->GetType() == gfxASurface::SurfaceTypeImage &&
aSurface->GetData(&SHAREDDIB_KEY);
}
} // namespace gfx
} // namespace mozilla