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5f9ec00358
In preperation to reuse it for a second `WindowSurface` backend as well as `NativeLayerWayland`. There should be no fundamental changes, just some restructuring: - Make `WaylandShmBuffer` as generic as possible so it can be easily reused - Remove resizing of buffers and create new ones instead. This is in order to reduce complexety at a likely low cost. - Make more use of refcounting, in order to make it easier to ensure things don't vanish beneath our feet. - Make some parts of the code more Mozillian/C++y, as opposed to Gnome-/C-ish, in order to make it easier to read for other FF-devs. - Fix some complains of static analysis Differential Revision: https://phabricator.services.mozilla.com/D115083
107 lines
3 KiB
C++
107 lines
3 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef _MOZILLA_WIDGET_GTK_WAYLAND_SHM_BUFFER_H
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#define _MOZILLA_WIDGET_GTK_WAYLAND_SHM_BUFFER_H
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#include "mozilla/gfx/2D.h"
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#include "mozilla/gfx/Types.h"
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#include "mozilla/Mutex.h"
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#include "nsTArray.h"
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#include "nsWaylandDisplay.h"
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namespace mozilla::widget {
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// Allocates and owns shared memory for Wayland drawing surface
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class WaylandShmPool {
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WaylandShmPool);
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static RefPtr<WaylandShmPool> Create(
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const RefPtr<nsWaylandDisplay>& aWaylandDisplay, int aSize);
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wl_shm_pool* GetShmPool() { return mShmPool; };
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void* GetImageData() { return mImageData; };
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private:
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explicit WaylandShmPool(int aSize);
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~WaylandShmPool();
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wl_shm_pool* mShmPool;
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int mShmPoolFd;
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int mAllocatedSize;
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void* mImageData;
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};
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// Holds actual graphics data for wl_surface
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class WaylandShmBuffer {
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public:
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NS_INLINE_DECL_THREADSAFE_REFCOUNTING(WaylandShmBuffer);
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static RefPtr<WaylandShmBuffer> Create(
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const RefPtr<nsWaylandDisplay>& aWaylandDisplay,
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const LayoutDeviceIntSize& aSize);
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already_AddRefed<gfx::DrawTarget> Lock();
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void AttachAndCommit(wl_surface* aSurface);
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bool IsAttached() { return mAttached; }
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void Clear();
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static void BufferReleaseCallbackHandler(void* aData, wl_buffer* aBuffer);
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void SetBufferReleaseFunc(void (*aBufferReleaseFunc)(void* aData,
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wl_buffer* aBuffer)) {
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mBufferReleaseFunc = aBufferReleaseFunc;
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}
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void SetBufferReleaseData(void* aBufferReleaseData) {
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mBufferReleaseData = aBufferReleaseData;
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}
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size_t GetBufferAge() { return mBufferAge; };
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LayoutDeviceIntSize GetSize() { return mSize; };
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static gfx::SurfaceFormat GetSurfaceFormat() { return mFormat; }
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wl_buffer* GetWlBuffer() { return mWLBuffer; };
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bool IsMatchingSize(const LayoutDeviceIntSize& aSize) {
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return aSize == mSize;
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}
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void IncrementBufferAge() { mBufferAge++; };
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void ResetBufferAge() { mBufferAge = 0; };
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#ifdef MOZ_LOGGING
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void DumpToFile(const char* aHint);
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#endif
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private:
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explicit WaylandShmBuffer(const LayoutDeviceIntSize& aSize);
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~WaylandShmBuffer();
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void BufferReleaseCallbackHandler(wl_buffer* aBuffer);
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// WaylandShmPoolMB provides actual shared memory we draw into
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RefPtr<WaylandShmPool> mShmPool;
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// wl_buffer is a wayland object that encapsulates the shared memory
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// and passes it to wayland compositor by wl_surface object.
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wl_buffer* mWLBuffer;
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void (*mBufferReleaseFunc)(void* aData, wl_buffer* aBuffer);
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void* mBufferReleaseData;
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LayoutDeviceIntSize mSize;
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size_t mBufferAge;
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bool mAttached;
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static gfx::SurfaceFormat mFormat;
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#ifdef MOZ_LOGGING
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static int mDumpSerial;
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static char* mDumpDir;
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#endif
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};
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} // namespace mozilla::widget
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#endif // _MOZILLA_WIDGET_GTK_WAYLAND_SHM_BUFFER_H
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