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/* -*- Mode: C++; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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 "GLImages.h"
#include "GLContext.h"
#include "GLContextProvider.h"
#include "ScopedGLHelpers.h"
#include "GLImages.h"
#include "GLBlitHelper.h"
#include "GLReadTexImageHelper.h"
#include "GLLibraryEGL.h"
#include "mozilla/gfx/Logging.h"
using namespace mozilla;
using namespace mozilla::gl;
namespace mozilla {
namespace layers {
static RefPtr<GLContext> sSnapshotContext;
EGLImageImage::EGLImageImage(EGLImage aImage, EGLSync aSync,
const gfx::IntSize& aSize, const gl::OriginPos& aOrigin,
bool aOwns)
: GLImage(ImageFormat::EGLIMAGE),
mImage(aImage),
mSync(aSync),
mSize(aSize),
mPos(aOrigin),
mOwns(aOwns)
{
}
EGLImageImage::~EGLImageImage()
{
if (!mOwns) {
return;
}
if (mImage) {
sEGLLibrary.fDestroyImage(EGL_DISPLAY(), mImage);
mImage = nullptr;
}
if (mSync) {
sEGLLibrary.fDestroySync(EGL_DISPLAY(), mSync);
mSync = nullptr;
}
}
already_AddRefed<gfx::SourceSurface>
GLImage::GetAsSourceSurface()
{
MOZ_ASSERT(NS_IsMainThread(), "Should be on the main thread");
if (!sSnapshotContext) {
nsCString discardFailureId;
sSnapshotContext = GLContextProvider::CreateHeadless(CreateContextFlags::NONE,
&discardFailureId);
if (!sSnapshotContext) {
NS_WARNING("Failed to create snapshot GLContext");
return nullptr;
}
}
sSnapshotContext->MakeCurrent();
ScopedTexture scopedTex(sSnapshotContext);
ScopedBindTexture boundTex(sSnapshotContext, scopedTex.Texture());
gfx::IntSize size = GetSize();
sSnapshotContext->fTexImage2D(LOCAL_GL_TEXTURE_2D, 0, LOCAL_GL_RGBA,
size.width, size.height, 0,
LOCAL_GL_RGBA,
LOCAL_GL_UNSIGNED_BYTE,
nullptr);
ScopedFramebufferForTexture autoFBForTex(sSnapshotContext, scopedTex.Texture());
if (!autoFBForTex.IsComplete()) {
gfxCriticalError() << "GetAsSourceSurface: ScopedFramebufferForTexture failed.";
return nullptr;
}
const gl::OriginPos destOrigin = gl::OriginPos::TopLeft;
if (!sSnapshotContext->BlitHelper()->BlitImageToFramebuffer(this, size,
autoFBForTex.FB(),
destOrigin))
{
return nullptr;
}
RefPtr<gfx::DataSourceSurface> source =
gfx::Factory::CreateDataSourceSurface(size, gfx::SurfaceFormat::B8G8R8A8);
if (NS_WARN_IF(!source)) {
return nullptr;
}
ScopedBindFramebuffer bind(sSnapshotContext, autoFBForTex.FB());
ReadPixelsIntoDataSurface(sSnapshotContext, source);
return source.forget();
}
} // namespace layers
} // namespace mozilla
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