зеркало из https://github.com/mozilla/gecko-dev.git
87 строки
2.3 KiB
C++
87 строки
2.3 KiB
C++
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#include "GLImages.h"
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#include "GLContext.h"
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#include "GLContextProvider.h"
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#include "ScopedGLHelpers.h"
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#include "GLImages.h"
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#include "GLBlitHelper.h"
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#include "GLReadTexImageHelper.h"
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#include "GLLibraryEGL.h"
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using namespace mozilla;
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using namespace mozilla::gl;
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namespace mozilla {
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namespace layers {
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static nsRefPtr<GLContext> sSnapshotContext;
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EGLImageImage::~EGLImageImage()
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{
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if (!mData.mOwns) {
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return;
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}
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if (mData.mImage) {
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sEGLLibrary.fDestroyImage(EGL_DISPLAY(), mData.mImage);
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mData.mImage = nullptr;
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}
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if (mData.mSync) {
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sEGLLibrary.fDestroySync(EGL_DISPLAY(), mData.mSync);
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mData.mSync = nullptr;
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}
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}
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already_AddRefed<gfx::SourceSurface>
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GLImage::GetAsSourceSurface()
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{
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MOZ_ASSERT(NS_IsMainThread(), "Should be on the main thread");
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if (!sSnapshotContext) {
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sSnapshotContext = GLContextProvider::CreateHeadless(CreateContextFlags::NONE);
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if (!sSnapshotContext) {
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NS_WARNING("Failed to create snapshot GLContext");
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return nullptr;
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}
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}
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sSnapshotContext->MakeCurrent();
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ScopedTexture scopedTex(sSnapshotContext);
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ScopedBindTexture boundTex(sSnapshotContext, scopedTex.Texture());
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gfx::IntSize size = GetSize();
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sSnapshotContext->fTexImage2D(LOCAL_GL_TEXTURE_2D, 0, LOCAL_GL_RGBA,
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size.width, size.height, 0,
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LOCAL_GL_RGBA,
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LOCAL_GL_UNSIGNED_BYTE,
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nullptr);
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ScopedFramebufferForTexture autoFBForTex(sSnapshotContext, scopedTex.Texture());
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if (!autoFBForTex.IsComplete()) {
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MOZ_CRASH("ScopedFramebufferForTexture failed.");
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}
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const gl::OriginPos destOrigin = gl::OriginPos::TopLeft;
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if (!sSnapshotContext->BlitHelper()->BlitImageToFramebuffer(this, size,
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autoFBForTex.FB(),
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destOrigin))
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{
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return nullptr;
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}
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RefPtr<gfx::DataSourceSurface> source =
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gfx::Factory::CreateDataSourceSurface(size, gfx::SurfaceFormat::B8G8R8A8);
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if (NS_WARN_IF(!source)) {
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return nullptr;
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}
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ScopedBindFramebuffer bind(sSnapshotContext, autoFBForTex.FB());
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ReadPixelsIntoDataSurface(sSnapshotContext, source);
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return source.forget();
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}
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} // namespace layers
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} // namespace mozilla
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