本文整理汇总了C++中GLContext::Screen方法的典型用法代码示例。如果您正苦于以下问题：C++ GLContext::Screen方法的具体用法？C++ GLContext::Screen怎么用？C++ GLContext::Screen使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类GLContext的用法示例。
在下文中一共展示了GLContext::Screen方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: CloneSurface
void
CanvasClientSharedSurface::UpdateRenderer(gfx::IntSize aSize, Renderer& aRenderer)
{
GLContext* gl = nullptr;
ClientCanvasLayer* layer = nullptr;
AsyncCanvasRenderer* asyncRenderer = nullptr;
if (aRenderer.constructed<ClientCanvasLayer*>()) {
layer = aRenderer.ref<ClientCanvasLayer*>();
gl = layer->mGLContext;
} else {
asyncRenderer = aRenderer.ref<AsyncCanvasRenderer*>();
gl = asyncRenderer->mGLContext;
}
gl->MakeCurrent();
RefPtr<TextureClient> newFront;
if (layer && layer->mGLFrontbuffer) {
mShSurfClient = CloneSurface(layer->mGLFrontbuffer.get(), layer->mFactory.get());
if (!mShSurfClient) {
gfxCriticalError() << "Invalid canvas front buffer";
return;
}
} else {
mShSurfClient = gl->Screen()->Front();
if (!mShSurfClient) {
return;
}
}
MOZ_ASSERT(mShSurfClient);
newFront = mShSurfClient;
SharedSurface* surf = mShSurfClient->Surf();
// Readback if needed.
mReadbackClient = nullptr;
auto forwarder = GetForwarder();
bool needsReadback = (surf->mType == SharedSurfaceType::Basic);
if (needsReadback) {
TextureFlags flags = TextureFlags::IMMUTABLE;
CompositableForwarder* shadowForwarder = nullptr;
if (layer) {
flags |= layer->Flags();
shadowForwarder = layer->ClientManager()->AsShadowForwarder();
} else {
MOZ_ASSERT(asyncRenderer);
flags |= mTextureFlags;
shadowForwarder = GetForwarder();
}
auto layersBackend = shadowForwarder->GetCompositorBackendType();
mReadbackClient = TexClientFromReadback(surf, forwarder, flags, layersBackend);
if (asyncRenderer) {
// Above codes will readback the GLContext to mReadbackClient
// in order to send frame to compositor. We copy from this
// TextureClient directly by calling CopyFromTextureClient().
// Therefore, if main-thread want the content of GLContext,
// it don't have to readback it again.
asyncRenderer->CopyFromTextureClient(mReadbackClient);
}
newFront = mReadbackClient;
} else {
mReadbackClient = nullptr;
}
MOZ_ASSERT(newFront);
if (!newFront) {
// May happen in a release build in case of memory pressure.
gfxCriticalError() << "Failed to allocate a TextureClient for SharedSurface Canvas. Size: " << aSize;
return;
}
mNewFront = newFront;
}