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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_GFX_X_VISUAL_MANAGER_H_
#define UI_GFX_X_VISUAL_MANAGER_H_
#include <unordered_map>
#include "base/component_export.h"
#include "ui/gfx/x/connection.h"
#include "ui/gfx/x/xproto.h"
namespace x11 {
// Selects a visual with a preference for alpha support on compositing window
// managers.
class COMPONENT_EXPORT(X11) VisualManager : public EventObserver {
public:
explicit VisualManager(Connection* connection);
VisualManager(const VisualManager&) = delete;
VisualManager& operator=(const VisualManager&) = delete;
~VisualManager() override;
// Picks the best argb or opaque visual given |want_argb_visual|.
void ChooseVisualForWindow(bool want_argb_visual,
x11::VisualId* visual_id,
uint8_t* depth,
x11::ColorMap* colormap,
bool* visual_has_alpha);
bool GetVisualInfo(x11::VisualId visual_id,
uint8_t* depth,
x11::ColorMap* colormap,
bool* visual_has_alpha);
// Are all of the system requirements met for using transparent visuals?
bool ArgbVisualAvailable() const;
private:
class XVisualData {
public:
XVisualData(x11::Connection* connection,
uint8_t depth,
const x11::VisualType* info);
~XVisualData();
x11::ColorMap GetColormap(x11::Connection* connection);
const uint8_t depth;
const raw_ptr<const x11::VisualType> info;
private:
x11::ColorMap colormap_{};
};
// EventObserver:
void OnEvent(const x11::Event& event) override;
const raw_ptr<x11::Connection> connection_;
Atom compositor_atom_ = x11::Atom::None;
Window compositor_owner_ = x11::Window::None;
std::unordered_map<x11::VisualId, std::unique_ptr<XVisualData>> visuals_;
x11::VisualId opaque_visual_id_{};
x11::VisualId transparent_visual_id_{};
};
} // namespace x11
#endif // UI_GFX_X_VISUAL_MANAGER_H_
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