michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this file,
michael@0:  * You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "gfxReusableImageSurfaceWrapper.h"
michael@0: #include "gfxImageSurface.h"
michael@0: 
michael@0: gfxReusableImageSurfaceWrapper::gfxReusableImageSurfaceWrapper(gfxImageSurface* aSurface)
michael@0:   : mSurface(aSurface)
michael@0: {
michael@0:   MOZ_COUNT_CTOR(gfxReusableImageSurfaceWrapper);
michael@0: }
michael@0: 
michael@0: gfxReusableImageSurfaceWrapper::~gfxReusableImageSurfaceWrapper()
michael@0: {
michael@0:   MOZ_COUNT_DTOR(gfxReusableImageSurfaceWrapper);
michael@0: }
michael@0: 
michael@0: void
michael@0: gfxReusableImageSurfaceWrapper::ReadLock()
michael@0: {
michael@0:   NS_ASSERT_OWNINGTHREAD(gfxReusableImageSurfaceWrapper);
michael@0:   AddRef();
michael@0: }
michael@0: 
michael@0: void
michael@0: gfxReusableImageSurfaceWrapper::ReadUnlock()
michael@0: {
michael@0:   Release();
michael@0: }
michael@0: 
michael@0: gfxReusableSurfaceWrapper*
michael@0: gfxReusableImageSurfaceWrapper::GetWritable(gfxImageSurface** aSurface)
michael@0: {
michael@0:   NS_ASSERT_OWNINGTHREAD(gfxReusableImageSurfaceWrapper);
michael@0: 
michael@0:   if (mRefCnt == 1) {
michael@0:     *aSurface = mSurface;
michael@0:     return this;
michael@0:   }
michael@0: 
michael@0:   // Something else is reading the surface, copy it
michael@0:   gfxImageSurface* copySurface = new gfxImageSurface(mSurface->GetSize(), mSurface->Format(), false);
michael@0:   copySurface->CopyFrom(mSurface);
michael@0:   *aSurface = copySurface;
michael@0: 
michael@0:   return new gfxReusableImageSurfaceWrapper(copySurface);
michael@0: }
michael@0: 
michael@0: const unsigned char*
michael@0: gfxReusableImageSurfaceWrapper::GetReadOnlyData() const
michael@0: {
michael@0:   return mSurface->Data();
michael@0: }
michael@0: 
michael@0: gfxImageFormat
michael@0: gfxReusableImageSurfaceWrapper::Format()
michael@0: {
michael@0:   return mSurface->Format();
michael@0: }
michael@0: