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