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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/desktop_display_info_loader.h"
#include <Cocoa/Cocoa.h>
#include "base/check.h"
#include "base/strings/sys_string_conversions.h"
namespace remoting {
namespace {
constexpr int kDefaultScreenDpi = 96;
class DesktopDisplayInfoLoaderMac : public DesktopDisplayInfoLoader {
public:
DesktopDisplayInfoLoaderMac() = default;
~DesktopDisplayInfoLoaderMac() override = default;
DesktopDisplayInfo GetCurrentDisplayInfo() override;
};
DesktopDisplayInfo DesktopDisplayInfoLoaderMac::GetCurrentDisplayInfo() {
DesktopDisplayInfo result;
NSArray* screens = NSScreen.screens;
DCHECK(screens);
// Each display origin is the bottom left corner, so we need to record the
// height of the main display (#0) so that we can adjust the origin of
// the secondary displays.
int main_display_height = 0;
for (NSUInteger i = 0; i < screens.count; ++i) {
NSScreen* screen = screens[i];
NSDictionary* device = screen.deviceDescription;
CGDirectDisplayID id =
static_cast<CGDirectDisplayID>([device[@"NSScreenNumber"] intValue]);
NSRect bounds = screen.frame;
int32_t x = bounds.origin.x;
int32_t y = bounds.origin.y;
uint32_t width = bounds.size.width;
uint32_t height = bounds.size.height;
uint32_t dpi = kDefaultScreenDpi * screen.backingScaleFactor;
bool is_default = false;
std::string display_name = base::SysNSStringToUTF8(screen.localizedName);
if (i == 0) {
DCHECK(x == 0);
DCHECK(y == 0);
is_default = true;
main_display_height = height;
}
// Convert origin from lower left to upper left (based on main display).
y = main_display_height - y - height;
result.AddDisplay({id, x, y, width, height, dpi,
/*bpp=*/ 24, is_default, display_name});
}
return result;
}
} // namespace
// static
std::unique_ptr<DesktopDisplayInfoLoader> DesktopDisplayInfoLoader::Create() {
return std::make_unique<DesktopDisplayInfoLoaderMac>();
}
} // namespace remoting
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