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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cmath>
#include "common/assert.h"
#include "core/frontend/framebuffer_layout.h"
#include "core/settings.h"
namespace Layout {
// Finds the largest size subrectangle contained in window area that is confined to the aspect ratio
template <class T>
static MathUtil::Rectangle<T> maxRectangle(MathUtil::Rectangle<T> window_area,
float screen_aspect_ratio) {
float scale = std::min(static_cast<float>(window_area.GetWidth()),
window_area.GetHeight() / screen_aspect_ratio);
return MathUtil::Rectangle<T>{0, 0, static_cast<T>(std::round(scale)),
static_cast<T>(std::round(scale * screen_aspect_ratio))};
}
FramebufferLayout DefaultFrameLayout(unsigned width, unsigned height) {
ASSERT(width > 0);
ASSERT(height > 0);
// The drawing code needs at least somewhat valid values for both screens
// so just calculate them both even if the other isn't showing.
FramebufferLayout res{width, height};
const float emulation_aspect_ratio{static_cast<float>(ScreenUndocked::Height) /
ScreenUndocked::Width};
MathUtil::Rectangle<unsigned> screen_window_area{0, 0, width, height};
MathUtil::Rectangle<unsigned> screen = maxRectangle(screen_window_area, emulation_aspect_ratio);
float window_aspect_ratio = static_cast<float>(height) / width;
if (window_aspect_ratio < emulation_aspect_ratio) {
screen = screen.TranslateX((screen_window_area.GetWidth() - screen.GetWidth()) / 2);
} else {
screen = screen.TranslateY((height - screen.GetHeight()) / 2);
}
res.screen = screen;
return res;
}
FramebufferLayout FrameLayoutFromResolutionScale(u16 res_scale) {
int width, height;
if (Settings::values.use_docked_mode) {
width = ScreenDocked::WidthDocked * res_scale;
height = ScreenDocked::HeightDocked * res_scale;
} else {
width = ScreenUndocked::Width * res_scale;
height = ScreenUndocked::Height * res_scale;
}
return DefaultFrameLayout(width, height);
}
} // namespace Layout
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