From d1bf7919daf830befd8c2166f3844fcdb56d68fa Mon Sep 17 00:00:00 2001
From: Yuri Kunde Schlesner <yuriks@yuriks.net>
Date: Sat, 27 May 2017 16:10:25 -0700
Subject: Move framebuffer_layout from Common to Core
This removes a dependency inversion between core and common. It's also
the proper place for the file since it makes screen layout decisions
specific to the 3DS.
---
src/core/frontend/framebuffer_layout.cpp | 157 +++++++++++++++++++++++++++++++
1 file changed, 157 insertions(+)
create mode 100644 src/core/frontend/framebuffer_layout.cpp
(limited to 'src/core/frontend/framebuffer_layout.cpp')
diff --git a/src/core/frontend/framebuffer_layout.cpp b/src/core/frontend/framebuffer_layout.cpp
new file mode 100644
index 0000000000..f3815170d5
--- /dev/null
+++ b/src/core/frontend/framebuffer_layout.cpp
@@ -0,0 +1,157 @@
+// Copyright 2016 Citra Emulator Project
+// 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"
+#include "video_core/video_core.h"
+
+namespace Layout {
+
+static const float TOP_SCREEN_ASPECT_RATIO =
+ static_cast<float>(VideoCore::kScreenTopHeight) / VideoCore::kScreenTopWidth;
+static const float BOT_SCREEN_ASPECT_RATIO =
+ static_cast<float>(VideoCore::kScreenBottomHeight) / VideoCore::kScreenBottomWidth;
+
+// 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, bool swapped) {
+ ASSERT(width > 0);
+ ASSERT(height > 0);
+
+ FramebufferLayout res{width, height, true, true, {}, {}};
+ // Default layout gives equal screen sizes to the top and bottom screen
+ MathUtil::Rectangle<unsigned> screen_window_area{0, 0, width, height / 2};
+ MathUtil::Rectangle<unsigned> top_screen =
+ maxRectangle(screen_window_area, TOP_SCREEN_ASPECT_RATIO);
+ MathUtil::Rectangle<unsigned> bot_screen =
+ maxRectangle(screen_window_area, BOT_SCREEN_ASPECT_RATIO);
+
+ float window_aspect_ratio = static_cast<float>(height) / width;
+ // both screens height are taken into account by multiplying by 2
+ float emulation_aspect_ratio = TOP_SCREEN_ASPECT_RATIO * 2;
+
+ if (window_aspect_ratio < emulation_aspect_ratio) {
+ // Apply borders to the left and right sides of the window.
+ top_screen =
+ top_screen.TranslateX((screen_window_area.GetWidth() - top_screen.GetWidth()) / 2);
+ bot_screen =
+ bot_screen.TranslateX((screen_window_area.GetWidth() - bot_screen.GetWidth()) / 2);
+ } else {
+ // Window is narrower than the emulation content => apply borders to the top and bottom
+ // Recalculate the bottom screen to account for the width difference between top and bottom
+ screen_window_area = {0, 0, width, top_screen.GetHeight()};
+ bot_screen = maxRectangle(screen_window_area, BOT_SCREEN_ASPECT_RATIO);
+ bot_screen = bot_screen.TranslateX((top_screen.GetWidth() - bot_screen.GetWidth()) / 2);
+ if (swapped) {
+ bot_screen = bot_screen.TranslateY(height / 2 - bot_screen.GetHeight());
+ } else {
+ top_screen = top_screen.TranslateY(height / 2 - top_screen.GetHeight());
+ }
+ }
+ // Move the top screen to the bottom if we are swapped.
+ res.top_screen = swapped ? top_screen.TranslateY(height / 2) : top_screen;
+ res.bottom_screen = swapped ? bot_screen : bot_screen.TranslateY(height / 2);
+ return res;
+}
+
+FramebufferLayout SingleFrameLayout(unsigned width, unsigned height, bool swapped) {
+ 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, !swapped, swapped, {}, {}};
+
+ MathUtil::Rectangle<unsigned> screen_window_area{0, 0, width, height};
+ MathUtil::Rectangle<unsigned> top_screen =
+ maxRectangle(screen_window_area, TOP_SCREEN_ASPECT_RATIO);
+ MathUtil::Rectangle<unsigned> bot_screen =
+ maxRectangle(screen_window_area, BOT_SCREEN_ASPECT_RATIO);
+
+ float window_aspect_ratio = static_cast<float>(height) / width;
+ float emulation_aspect_ratio = (swapped) ? BOT_SCREEN_ASPECT_RATIO : TOP_SCREEN_ASPECT_RATIO;
+
+ if (window_aspect_ratio < emulation_aspect_ratio) {
+ top_screen =
+ top_screen.TranslateX((screen_window_area.GetWidth() - top_screen.GetWidth()) / 2);
+ bot_screen =
+ bot_screen.TranslateX((screen_window_area.GetWidth() - bot_screen.GetWidth()) / 2);
+ } else {
+ top_screen = top_screen.TranslateY((height - top_screen.GetHeight()) / 2);
+ bot_screen = bot_screen.TranslateY((height - bot_screen.GetHeight()) / 2);
+ }
+ res.top_screen = top_screen;
+ res.bottom_screen = bot_screen;
+ return res;
+}
+
+FramebufferLayout LargeFrameLayout(unsigned width, unsigned height, bool swapped) {
+ ASSERT(width > 0);
+ ASSERT(height > 0);
+
+ FramebufferLayout res{width, height, true, true, {}, {}};
+ // Split the window into two parts. Give 4x width to the main screen and 1x width to the small
+ // To do that, find the total emulation box and maximize that based on window size
+ float window_aspect_ratio = static_cast<float>(height) / width;
+ float emulation_aspect_ratio =
+ swapped
+ ? VideoCore::kScreenBottomHeight * 4 /
+ (VideoCore::kScreenBottomWidth * 4.0f + VideoCore::kScreenTopWidth)
+ : VideoCore::kScreenTopHeight * 4 /
+ (VideoCore::kScreenTopWidth * 4.0f + VideoCore::kScreenBottomWidth);
+ float large_screen_aspect_ratio = swapped ? BOT_SCREEN_ASPECT_RATIO : TOP_SCREEN_ASPECT_RATIO;
+ float small_screen_aspect_ratio = swapped ? TOP_SCREEN_ASPECT_RATIO : BOT_SCREEN_ASPECT_RATIO;
+
+ MathUtil::Rectangle<unsigned> screen_window_area{0, 0, width, height};
+ MathUtil::Rectangle<unsigned> total_rect =
+ maxRectangle(screen_window_area, emulation_aspect_ratio);
+ MathUtil::Rectangle<unsigned> large_screen =
+ maxRectangle(total_rect, large_screen_aspect_ratio);
+ MathUtil::Rectangle<unsigned> fourth_size_rect = total_rect.Scale(.25f);
+ MathUtil::Rectangle<unsigned> small_screen =
+ maxRectangle(fourth_size_rect, small_screen_aspect_ratio);
+
+ if (window_aspect_ratio < emulation_aspect_ratio) {
+ large_screen =
+ large_screen.TranslateX((screen_window_area.GetWidth() - total_rect.GetWidth()) / 2);
+ } else {
+ large_screen = large_screen.TranslateY((height - total_rect.GetHeight()) / 2);
+ }
+ // Shift the small screen to the bottom right corner
+ small_screen =
+ small_screen.TranslateX(large_screen.right)
+ .TranslateY(large_screen.GetHeight() + large_screen.top - small_screen.GetHeight());
+ res.top_screen = swapped ? small_screen : large_screen;
+ res.bottom_screen = swapped ? large_screen : small_screen;
+ return res;
+}
+
+FramebufferLayout CustomFrameLayout(unsigned width, unsigned height) {
+ ASSERT(width > 0);
+ ASSERT(height > 0);
+
+ FramebufferLayout res{width, height, true, true, {}, {}};
+
+ MathUtil::Rectangle<unsigned> top_screen{
+ Settings::values.custom_top_left, Settings::values.custom_top_top,
+ Settings::values.custom_top_right, Settings::values.custom_top_bottom};
+ MathUtil::Rectangle<unsigned> bot_screen{
+ Settings::values.custom_bottom_left, Settings::values.custom_bottom_top,
+ Settings::values.custom_bottom_right, Settings::values.custom_bottom_bottom};
+
+ res.top_screen = top_screen;
+ res.bottom_screen = bot_screen;
+ return res;
+}
+}
--
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