зеркало из https://github.com/mozilla/gecko-dev.git
93 строки
2.8 KiB
C++
93 строки
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
* 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/. */
|
|
|
|
#include <iostream>
|
|
#include <windows.h>
|
|
|
|
#include "DisplayConfigWindows.h"
|
|
|
|
namespace mozilla {
|
|
namespace gfx {
|
|
|
|
using namespace std;
|
|
|
|
optional<DisplayConfig> GetDisplayConfig() {
|
|
LONG result;
|
|
|
|
UINT32 numPaths;
|
|
UINT32 numModes;
|
|
vector<DISPLAYCONFIG_PATH_INFO> paths;
|
|
vector<DISPLAYCONFIG_MODE_INFO> modes;
|
|
do {
|
|
result = GetDisplayConfigBufferSizes(QDC_ONLY_ACTIVE_PATHS, &numPaths,
|
|
&numModes);
|
|
if (result != ERROR_SUCCESS) {
|
|
return {};
|
|
}
|
|
// allocate the recommended amount of space
|
|
paths.resize(numPaths);
|
|
modes.resize(numModes);
|
|
|
|
result = QueryDisplayConfig(QDC_ONLY_ACTIVE_PATHS, &numPaths, paths.data(),
|
|
&numModes, modes.data(), NULL);
|
|
// try again if there wasn't enough space
|
|
} while (result == ERROR_INSUFFICIENT_BUFFER);
|
|
|
|
if (result != ERROR_SUCCESS) return {};
|
|
|
|
// shrink to fit the actual number of modes and paths returned
|
|
modes.resize(numModes);
|
|
paths.resize(numPaths);
|
|
|
|
return DisplayConfig{paths, modes};
|
|
}
|
|
|
|
bool HasScaledResolution() {
|
|
auto config = GetDisplayConfig();
|
|
if (config) {
|
|
for (auto& path : config->mPaths) {
|
|
auto& modes = config->mModes;
|
|
int targetModeIndex = path.targetInfo.modeInfoIdx;
|
|
int sourceModeIndex = path.sourceInfo.modeInfoIdx;
|
|
|
|
// Check if the source and target resolutions are different
|
|
if ((modes[targetModeIndex]
|
|
.targetMode.targetVideoSignalInfo.activeSize.cx !=
|
|
modes[sourceModeIndex].sourceMode.width) ||
|
|
(modes[targetModeIndex]
|
|
.targetMode.targetVideoSignalInfo.activeSize.cy !=
|
|
modes[sourceModeIndex].sourceMode.height)) {
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void GetScaledResolutions(ScaledResolutionSet& aRv) {
|
|
auto config = GetDisplayConfig();
|
|
if (config) {
|
|
for (auto& path : config->mPaths) {
|
|
auto& modes = config->mModes;
|
|
int targetModeIndex = path.targetInfo.modeInfoIdx;
|
|
int sourceModeIndex = path.sourceInfo.modeInfoIdx;
|
|
|
|
// Check if the source and target resolutions are different
|
|
IntSize src(modes[sourceModeIndex].sourceMode.width,
|
|
modes[sourceModeIndex].sourceMode.height);
|
|
IntSize dst(
|
|
modes[targetModeIndex].targetMode.targetVideoSignalInfo.activeSize.cx,
|
|
modes[targetModeIndex]
|
|
.targetMode.targetVideoSignalInfo.activeSize.cy);
|
|
if (src != dst) {
|
|
aRv.AppendElement(std::pair<IntSize, IntSize>{src, dst});
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace gfx
|
|
} // namespace mozilla
|