mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-10-31 14:15:30 +00:00
128 lines
4.3 KiB
C++
128 lines
4.3 KiB
C++
// vim:set ts=4 sts=4 sw=4 et cin:
|
|
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
|
|
* ***** 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 Nokia Corporation code.
|
|
*
|
|
* The Initial Developer of the Original Code is Nokia Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 2005
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Oleg Romashin <romaxa@gmail.com>
|
|
*
|
|
* 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 "base/basictypes.h"
|
|
#include "gfxSharedImageSurface.h"
|
|
#include "cairo.h"
|
|
|
|
#define MOZ_ALIGN_WORD(x) (((x) + 3) & ~3)
|
|
|
|
using namespace mozilla::ipc;
|
|
|
|
static const cairo_user_data_key_t SHM_KEY = {0};
|
|
|
|
struct SharedImageInfo {
|
|
PRInt32 width;
|
|
PRInt32 height;
|
|
PRInt32 format;
|
|
};
|
|
|
|
static SharedImageInfo*
|
|
GetShmInfoPtr(const Shmem& aShmem)
|
|
{
|
|
return reinterpret_cast<SharedImageInfo*>
|
|
(aShmem.get<char>() + aShmem.Size<char>() - sizeof(SharedImageInfo));
|
|
}
|
|
|
|
gfxSharedImageSurface::~gfxSharedImageSurface()
|
|
{
|
|
MOZ_COUNT_DTOR(gfxSharedImageSurface);
|
|
}
|
|
|
|
/*static*/ PRBool
|
|
gfxSharedImageSurface::IsSharedImage(gfxASurface* aSurface)
|
|
{
|
|
return (aSurface
|
|
&& aSurface->GetType() == gfxASurface::SurfaceTypeImage
|
|
&& aSurface->GetData(&SHM_KEY));
|
|
}
|
|
|
|
gfxSharedImageSurface::gfxSharedImageSurface(const gfxIntSize& aSize,
|
|
gfxImageFormat aFormat,
|
|
const Shmem& aShmem)
|
|
{
|
|
MOZ_COUNT_CTOR(gfxSharedImageSurface);
|
|
|
|
mSize = aSize;
|
|
mFormat = aFormat;
|
|
mStride = ComputeStride(aSize, aFormat);
|
|
mShmem = aShmem;
|
|
mData = aShmem.get<unsigned char>();
|
|
cairo_surface_t *surface =
|
|
cairo_image_surface_create_for_data(mData,
|
|
(cairo_format_t)mFormat,
|
|
mSize.width,
|
|
mSize.height,
|
|
mStride);
|
|
if (surface) {
|
|
cairo_surface_set_user_data(surface, &SHM_KEY, this, NULL);
|
|
}
|
|
Init(surface);
|
|
}
|
|
|
|
void
|
|
gfxSharedImageSurface::WriteShmemInfo()
|
|
{
|
|
SharedImageInfo* shmInfo = GetShmInfoPtr(mShmem);
|
|
shmInfo->width = mSize.width;
|
|
shmInfo->height = mSize.height;
|
|
shmInfo->format = mFormat;
|
|
}
|
|
|
|
/*static*/ size_t
|
|
gfxSharedImageSurface::GetAlignedSize(const gfxIntSize& aSize, long aStride)
|
|
{
|
|
return MOZ_ALIGN_WORD(sizeof(SharedImageInfo) + aSize.height * aStride);
|
|
}
|
|
|
|
/*static*/ already_AddRefed<gfxSharedImageSurface>
|
|
gfxSharedImageSurface::Open(const Shmem& aShmem)
|
|
{
|
|
SharedImageInfo* shmInfo = GetShmInfoPtr(aShmem);
|
|
gfxIntSize size(shmInfo->width, shmInfo->height);
|
|
if (!CheckSurfaceSize(size))
|
|
return nsnull;
|
|
|
|
nsRefPtr<gfxSharedImageSurface> s =
|
|
new gfxSharedImageSurface(size,
|
|
(gfxImageFormat)shmInfo->format,
|
|
aShmem);
|
|
// We didn't create this Shmem and so don't free it on errors
|
|
return (s->CairoStatus() != 0) ? nsnull : s.forget();
|
|
}
|