Re-land: C++ readability review
[chromium-blink-merge.git] / ui / display / chromeos / x11 / native_display_delegate_x11.h
blob1d7d42a805bfb2badc48d2d35f1596071a243820
1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef UI_DISPLAY_CHROMEOS_X11_NATIVE_DISPLAY_DELEGATE_X11_H_
6 #define UI_DISPLAY_CHROMEOS_X11_NATIVE_DISPLAY_DELEGATE_X11_H_
8 #include <stdint.h>
10 #include <map>
11 #include <set>
12 #include <vector>
14 #include "base/compiler_specific.h"
15 #include "base/event_types.h"
16 #include "base/memory/scoped_ptr.h"
17 #include "base/memory/scoped_vector.h"
18 #include "base/observer_list.h"
19 #include "ui/display/display_export.h"
20 #include "ui/display/types/native_display_delegate.h"
21 #include "ui/gfx/geometry/point.h"
22 #include "ui/gfx/geometry/size.h"
23 #include "ui/gfx/x/x11_types.h"
25 // Forward declarations for Xlib and Xrandr.
26 // This is so unused X definitions don't pollute the namespace.
27 typedef XID RROutput;
28 typedef XID RRCrtc;
29 typedef XID RRMode;
30 typedef XID Window;
32 struct _XRROutputInfo;
33 typedef _XRROutputInfo XRROutputInfo;
34 struct _XRRScreenResources;
35 typedef _XRRScreenResources XRRScreenResources;
36 struct _XRRCrtcGamma;
37 typedef _XRRCrtcGamma XRRCrtcGamma;
39 extern "C" {
40 void XRRFreeScreenResources(XRRScreenResources* resources);
43 namespace ui {
45 class DisplayModeX11;
46 class DisplaySnapshotX11;
47 class NativeDisplayEventDispatcherX11;
49 class DISPLAY_EXPORT NativeDisplayDelegateX11 : public NativeDisplayDelegate {
50 public:
51 // Helper class that allows NativeDisplayEventDispatcherX11 and
52 // NativeDisplayDelegateX11::PlatformEventObserverX11 to interact with this
53 // class or with mocks in tests.
54 class HelperDelegate {
55 public:
56 virtual ~HelperDelegate() {}
58 // Tells XRandR to update its configuration in response to |event|, an
59 // RRScreenChangeNotify event.
60 virtual void UpdateXRandRConfiguration(const base::NativeEvent& event) = 0;
62 // Returns the list of current outputs. This is used to discard duplicate
63 // events.
64 virtual const std::vector<DisplaySnapshot*>& GetCachedDisplays() const = 0;
66 // Notify |observers_| that a change in configuration has occurred.
67 virtual void NotifyDisplayObservers() = 0;
70 NativeDisplayDelegateX11();
71 ~NativeDisplayDelegateX11() override;
73 // NativeDisplayDelegate overrides:
74 void Initialize() override;
75 void GrabServer() override;
76 void UngrabServer() override;
77 bool TakeDisplayControl() override;
78 bool RelinquishDisplayControl() override;
79 void SyncWithServer() override;
80 void SetBackgroundColor(uint32_t color_argb) override;
81 void ForceDPMSOn() override;
82 void GetDisplays(const GetDisplaysCallback& callback) override;
83 void AddMode(const DisplaySnapshot& output, const DisplayMode* mode) override;
84 void Configure(const DisplaySnapshot& output,
85 const DisplayMode* mode,
86 const gfx::Point& origin,
87 const ConfigureCallback& callback) override;
88 void CreateFrameBuffer(const gfx::Size& size) override;
89 bool GetHDCPState(const DisplaySnapshot& output, HDCPState* state) override;
90 bool SetHDCPState(const DisplaySnapshot& output, HDCPState state) override;
91 std::vector<ColorCalibrationProfile> GetAvailableColorCalibrationProfiles(
92 const DisplaySnapshot& output) override;
93 bool SetColorCalibrationProfile(const DisplaySnapshot& output,
94 ColorCalibrationProfile new_profile) override;
95 void AddObserver(NativeDisplayObserver* observer) override;
96 void RemoveObserver(NativeDisplayObserver* observer) override;
98 private:
99 class HelperDelegateX11;
101 // Parses all the modes made available by |screen_|.
102 void InitModes();
104 // Helper method for GetOutputs() that returns an OutputSnapshot struct based
105 // on the passed-in information.
106 DisplaySnapshotX11* InitDisplaySnapshot(RROutput id,
107 XRROutputInfo* info,
108 std::set<RRCrtc>* last_used_crtcs,
109 int index);
111 // Destroys unused CRTCs.
112 void DestroyUnusedCrtcs();
114 // Parks used CRTCs in a way which allows a framebuffer resize. This is faster
115 // than turning them off, resizing, then turning them back on.
116 // |min_screen_size| represent the smallest size between the current
117 // framebuffer size and the requested framebuffer size.
118 void UpdateCrtcsForNewFramebuffer(const gfx::Size& min_screen_size);
120 bool ConfigureCrtc(RRCrtc crtc, RRMode mode, RROutput output, int x, int y);
122 // Returns whether |id| is configured to preserve aspect when scaling.
123 bool IsOutputAspectPreservingScaling(RROutput id);
125 // Creates the gamma ramp for |new_profile|, or NULL if it doesn't exist.
126 // The caller should take the ownership.
127 XRRCrtcGamma* CreateGammaRampForProfile(
128 const DisplaySnapshotX11& x11_output,
129 ColorCalibrationProfile new_profile);
131 void DrawBackground();
133 XDisplay* display_;
134 Window window_;
136 // Initialized when the server is grabbed and freed when it's ungrabbed.
137 gfx::XScopedPtr<
138 XRRScreenResources,
139 gfx::XObjectDeleter<XRRScreenResources, void, XRRFreeScreenResources>>
140 screen_;
142 std::map<RRMode, DisplayModeX11*> modes_;
144 // Every time GetOutputs() is called we cache the updated list of outputs in
145 // |cached_outputs_| so that we can check for duplicate events rather than
146 // propagate them.
147 ScopedVector<DisplaySnapshot> cached_outputs_;
149 scoped_ptr<HelperDelegate> helper_delegate_;
151 // Processes X11 display events associated with the root window and notifies
152 // |observers_| when a display change has occurred.
153 scoped_ptr<NativeDisplayEventDispatcherX11> platform_event_dispatcher_;
155 // List of observers waiting for display configuration change events.
156 ObserverList<NativeDisplayObserver> observers_;
158 // A background color used during boot time + multi displays.
159 uint32_t background_color_argb_;
161 DISALLOW_COPY_AND_ASSIGN(NativeDisplayDelegateX11);
164 } // namespace ui
166 #endif // UI_DISPLAY_CHROMEOS_X11_NATIVE_DISPLAY_DELEGATE_X11_H_