summaryrefslogtreecommitdiffstats
path: root/gfx/gl/GLScreenBuffer.h
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /gfx/gl/GLScreenBuffer.h
parentInitial commit. (diff)
downloadfirefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz
firefox-26a029d407be480d791972afb5975cf62c9360a6.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'gfx/gl/GLScreenBuffer.h')
-rw-r--r--gfx/gl/GLScreenBuffer.h87
1 files changed, 87 insertions, 0 deletions
diff --git a/gfx/gl/GLScreenBuffer.h b/gfx/gl/GLScreenBuffer.h
new file mode 100644
index 0000000000..d281249771
--- /dev/null
+++ b/gfx/gl/GLScreenBuffer.h
@@ -0,0 +1,87 @@
+/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 4; -*- */
+/* 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/. */
+
+/* GLScreenBuffer is the abstraction for the "default framebuffer" used
+ * by an offscreen GLContext. Since it's only for offscreen GLContext's,
+ * it's only useful for things like WebGL, and is NOT used by the
+ * compositor's GLContext. Remember that GLContext provides an abstraction
+ * so that even if you want to draw to the 'screen', even if that's not
+ * actually the screen, just draw to 0. This GLScreenBuffer class takes the
+ * logic handling out of GLContext.
+ */
+
+#ifndef SCREEN_BUFFER_H_
+#define SCREEN_BUFFER_H_
+
+#include "GLTypes.h"
+#include "mozilla/gfx/Point.h"
+#include "mozilla/UniquePtr.h"
+
+#include <functional>
+#include <queue>
+#include <memory>
+
+namespace mozilla {
+namespace gl {
+
+class SharedSurface;
+class SurfaceFactory;
+class SwapChain;
+
+class SwapChainPresenter final {
+ friend class SwapChain;
+
+ SwapChain* mSwapChain;
+ std::shared_ptr<SharedSurface> mBackBuffer;
+
+ public:
+ explicit SwapChainPresenter(SwapChain& swapChain);
+ ~SwapChainPresenter();
+
+ const auto& BackBuffer() const { return mBackBuffer; }
+
+ std::shared_ptr<SharedSurface> SwapBackBuffer(std::shared_ptr<SharedSurface>);
+ GLuint Fb() const;
+};
+
+// -
+
+class SwapChain final {
+ friend class SwapChainPresenter;
+
+ public:
+ UniquePtr<SurfaceFactory> mFactory;
+
+ private:
+ std::queue<std::shared_ptr<SharedSurface>> mPool;
+ std::shared_ptr<SharedSurface> mFrontBuffer;
+ std::function<void()> mDestroyedCallback;
+
+ public:
+ std::shared_ptr<SharedSurface>
+ mPrevFrontBuffer; // Hold this ref while it's in-flight.
+ private:
+ SwapChainPresenter* mPresenter = nullptr;
+
+ public:
+ SwapChain();
+ virtual ~SwapChain();
+
+ void ClearPool();
+ bool StoreRecycledSurface(const std::shared_ptr<SharedSurface>& surf);
+ const auto& FrontBuffer() const { return mFrontBuffer; }
+ UniquePtr<SwapChainPresenter> Acquire(const gfx::IntSize&, gfx::ColorSpace2);
+
+ void SetDestroyedCallback(std::function<void()>&& aDestroyedCallback) {
+ MOZ_ASSERT(!mDestroyedCallback);
+ mDestroyedCallback = std::move(aDestroyedCallback);
+ mPool = {};
+ }
+};
+
+} // namespace gl
+} // namespace mozilla
+
+#endif // SCREEN_BUFFER_H_