gecko-dev/gfx/thebes/gfxReusableImageSurfaceWrap...

62 строки
1.4 KiB
C++

/* 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 "gfxReusableImageSurfaceWrapper.h"
#include "gfxImageSurface.h"
gfxReusableImageSurfaceWrapper::gfxReusableImageSurfaceWrapper(gfxImageSurface* aSurface)
: mSurface(aSurface)
{
MOZ_COUNT_CTOR(gfxReusableImageSurfaceWrapper);
}
gfxReusableImageSurfaceWrapper::~gfxReusableImageSurfaceWrapper()
{
MOZ_COUNT_DTOR(gfxReusableImageSurfaceWrapper);
}
void
gfxReusableImageSurfaceWrapper::ReadLock()
{
NS_ASSERT_OWNINGTHREAD(gfxReusableImageSurfaceWrapper);
AddRef();
}
void
gfxReusableImageSurfaceWrapper::ReadUnlock()
{
Release();
}
gfxReusableSurfaceWrapper*
gfxReusableImageSurfaceWrapper::GetWritable(gfxImageSurface** aSurface)
{
NS_ASSERT_OWNINGTHREAD(gfxReusableImageSurfaceWrapper);
if (mRefCnt == 1) {
*aSurface = mSurface;
return this;
}
// Something else is reading the surface, copy it
gfxImageSurface* copySurface = new gfxImageSurface(mSurface->GetSize(), mSurface->Format(), false);
copySurface->CopyFrom(mSurface);
*aSurface = copySurface;
return new gfxReusableImageSurfaceWrapper(copySurface);
}
const unsigned char*
gfxReusableImageSurfaceWrapper::GetReadOnlyData() const
{
return mSurface->Data();
}
gfxImageFormat
gfxReusableImageSurfaceWrapper::Format()
{
return mSurface->Format();
}