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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stdint.h>
#include <vector>
#include "base/callback.h"
#include "ui/display/types/display_constants.h"
#include "ui/display/types/display_types_export.h"
#include "ui/display/types/fake_display_controller.h"
namespace gfx {
class Point;
namespace display {
class DisplayMode;
class DisplaySnapshot;
class NativeDisplayObserver;
struct GammaRampRGBEntry;
using GetDisplaysCallback =
base::OnceCallback<void(const std::vector<DisplaySnapshot*>&)>;
using ConfigureCallback = base::OnceCallback<void(bool)>;
using GetHDCPStateCallback = base::OnceCallback<void(bool, HDCPState)>;
using SetHDCPStateCallback = base::OnceCallback<void(bool)>;
using DisplayControlCallback = base::OnceCallback<void(bool)>;
// Interface for classes that perform display configuration actions on behalf
// of DisplayConfigurator.
// Implementations may perform calls asynchronously. In the case of functions
// taking callbacks, the callbacks may be called asynchronously when the results
// are available. The implementations must provide a strong guarantee that the
// callbacks are always called.
class DISPLAY_TYPES_EXPORT NativeDisplayDelegate {
virtual ~NativeDisplayDelegate();
virtual void Initialize() = 0;
// Take control of the display from any other controlling process.
virtual void TakeDisplayControl(DisplayControlCallback callback) = 0;
// Let others control the display.
virtual void RelinquishDisplayControl(DisplayControlCallback callback) = 0;
// Queries for a list of fresh displays and returns them via |callback|.
// Note the query operation may be expensive and take over 60 milliseconds.
virtual void GetDisplays(GetDisplaysCallback callback) = 0;
// Configures the display represented by |output| to use |mode| and positions
// the display to |origin| in the framebuffer. |mode| can be NULL, which
// represents disabling the display. The callback will return the status of
// the operation.
virtual void Configure(const DisplaySnapshot& output,
const DisplayMode* mode,
const gfx::Point& origin,
ConfigureCallback callback) = 0;
// Gets HDCP state of output.
virtual void GetHDCPState(const DisplaySnapshot& output,
GetHDCPStateCallback callback) = 0;
// Sets HDCP state of output.
virtual void SetHDCPState(const DisplaySnapshot& output,
HDCPState state,
SetHDCPStateCallback callback) = 0;
// Sets the given 3x3 |color_matrix| on the display with |display_id|.
// This doesn't affect gamma or degamma. It returns true the color matrix was
// sent to the GPU process successfully.
virtual bool SetColorMatrix(int64_t display_id,
const std::vector<float>& color_matrix) = 0;
// Sets the given |gamma_lut| and |degamma_lut| on the display with
// |display_id|. Returns true if the given tables were sent to the GPU process
// successfully.
virtual bool SetGammaCorrection(
int64_t display_id,
const std::vector<GammaRampRGBEntry>& degamma_lut,
const std::vector<GammaRampRGBEntry>& gamma_lut) = 0;
virtual void AddObserver(NativeDisplayObserver* observer) = 0;
virtual void RemoveObserver(NativeDisplayObserver* observer) = 0;
// Returns a fake display controller that can modify the fake display state.
// Will return null if not needed, most likely because the delegate is
// intended for use on device and doesn't need to fake the display state.
virtual FakeDisplayController* GetFakeDisplayController() = 0;
} // namespace display