renderer_gl: Disable stereo on bottom screen

* Remove reverse interlaced in favour of the checkbox

src/citra/config.cpp

@@ -143,7 +143,7 @@ void Config::ReadValues() {
     ReadSetting("Renderer", Settings::values.use_vsync_new);
     ReadSetting("Renderer", Settings::values.texture_filter);
 
-    ReadSetting("Renderer", Settings::values.mono_render_option);
+    ReadSetting("Renderer", Settings::values.swap_eyes);
     ReadSetting("Renderer", Settings::values.render_3d);
     ReadSetting("Renderer", Settings::values.factor_3d);
     ReadSetting("Renderer", Settings::values.pp_shader_name);

src/citra_qt/bootmanager.cpp

@@ -582,6 +582,14 @@ void GRenderWindow::resizeEvent(QResizeEvent* event) {
     OnFramebufferSizeChanged();
 }
 
+void GRenderWindow::moveEvent(QMoveEvent* event) {
+    QWidget::moveEvent(event);
+    if (is_secondary) {
+        const auto screen_pos = Common::MakeVec(pos().x(), pos().y());
+        SetScreenPos(screen_pos);
+    }
+}
+
 bool GRenderWindow::InitRenderTarget() {
     {
         // Create a dummy render widget so that Qt

src/citra_qt/bootmanager.h

@@ -136,6 +136,7 @@ public:
     void closeEvent(QCloseEvent* event) override;
 
     void resizeEvent(QResizeEvent* event) override;
+    void moveEvent(QMoveEvent* event) override;
 
     void keyPressEvent(QKeyEvent* event) override;
     void keyReleaseEvent(QKeyEvent* event) override;

src/citra_qt/configuration/config.cpp

@@ -505,9 +505,9 @@ void Config::ReadLayoutValues() {
     ReadGlobalSetting(Settings::values.swap_screen);
     ReadGlobalSetting(Settings::values.upright_screen);
     ReadGlobalSetting(Settings::values.large_screen_proportion);
+    ReadBasicSetting(Settings::values.swap_eyes);
 
     if (global) {
-        ReadBasicSetting(Settings::values.mono_render_option);
         ReadBasicSetting(Settings::values.custom_layout);
         ReadBasicSetting(Settings::values.custom_top_left);
         ReadBasicSetting(Settings::values.custom_top_top);
@@ -1017,9 +1017,9 @@ void Config::SaveLayoutValues() {
     WriteGlobalSetting(Settings::values.swap_screen);
     WriteGlobalSetting(Settings::values.upright_screen);
     WriteGlobalSetting(Settings::values.large_screen_proportion);
+    WriteBasicSetting(Settings::values.swap_eyes);
 
     if (global) {
-        WriteBasicSetting(Settings::values.mono_render_option);
         WriteBasicSetting(Settings::values.custom_layout);
         WriteBasicSetting(Settings::values.custom_top_left);
         WriteBasicSetting(Settings::values.custom_top_top);

src/citra_qt/configuration/configure_enhancements.cpp

@@ -74,9 +74,8 @@ void ConfigureEnhancements::SetConfiguration() {
     ui->render_3d_combobox->setCurrentIndex(
         static_cast<int>(Settings::values.render_3d.GetValue()));
     ui->factor_3d->setValue(Settings::values.factor_3d.GetValue());
-    ui->mono_rendering_eye->setCurrentIndex(
-        static_cast<int>(Settings::values.mono_render_option.GetValue()));
     updateShaders(Settings::values.render_3d.GetValue());
+    ui->toggle_swap_eyes->setChecked(Settings::values.swap_eyes.GetValue());
     ui->toggle_linear_filter->setChecked(Settings::values.filter_mode.GetValue());
     ui->toggle_swap_screen->setChecked(Settings::values.swap_screen.GetValue());
     ui->toggle_upright_screen->setChecked(Settings::values.upright_screen.GetValue());
@@ -98,8 +97,7 @@ void ConfigureEnhancements::updateShaders(Settings::StereoRenderOption stereo_op
     ui->shader_combobox->clear();
     ui->shader_combobox->setEnabled(true);
 
-    if (stereo_option == Settings::StereoRenderOption::Interlaced ||
-        stereo_option == Settings::StereoRenderOption::ReverseInterlaced) {
+    if (stereo_option == Settings::StereoRenderOption::Interlaced) {
         ui->shader_combobox->addItem(QStringLiteral("horizontal (builtin)"));
         ui->shader_combobox->setCurrentIndex(0);
         ui->shader_combobox->setEnabled(false);
@@ -135,8 +133,6 @@ void ConfigureEnhancements::ApplyConfiguration() {
     Settings::values.render_3d =
         static_cast<Settings::StereoRenderOption>(ui->render_3d_combobox->currentIndex());
     Settings::values.factor_3d = ui->factor_3d->value();
-    Settings::values.mono_render_option =
-        static_cast<Settings::MonoRenderOption>(ui->mono_rendering_eye->currentIndex());
     if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::Anaglyph) {
         Settings::values.anaglyph_shader_name =
             ui->shader_combobox->itemText(ui->shader_combobox->currentIndex()).toStdString();
@@ -146,6 +142,8 @@ void ConfigureEnhancements::ApplyConfiguration() {
     }
     Settings::values.large_screen_proportion = ui->large_screen_proportion->value();
 
+    ConfigurationShared::ApplyPerGameSetting(&Settings::values.swap_eyes, ui->toggle_swap_eyes,
+                                             swap_eyes);
     ConfigurationShared::ApplyPerGameSetting(&Settings::values.filter_mode,
                                              ui->toggle_linear_filter, linear_filter);
     ConfigurationShared::ApplyPerGameSetting(&Settings::values.texture_filter,
@@ -174,6 +172,7 @@ void ConfigureEnhancements::SetupPerGameUI() {
     if (Settings::IsConfiguringGlobal()) {
         ui->widget_resolution->setEnabled(Settings::values.resolution_factor.UsingGlobal());
         ui->widget_texture_filter->setEnabled(Settings::values.texture_filter.UsingGlobal());
+        ui->toggle_swap_eyes->setEnabled(Settings::values.swap_eyes.UsingGlobal());
         ui->toggle_linear_filter->setEnabled(Settings::values.filter_mode.UsingGlobal());
         ui->toggle_swap_screen->setEnabled(Settings::values.swap_screen.UsingGlobal());
         ui->toggle_upright_screen->setEnabled(Settings::values.upright_screen.UsingGlobal());
@@ -193,6 +192,8 @@ void ConfigureEnhancements::SetupPerGameUI() {
                                             linear_filter);
     ConfigurationShared::SetColoredTristate(ui->toggle_swap_screen, Settings::values.swap_screen,
                                             swap_screen);
+    ConfigurationShared::SetColoredTristate(ui->toggle_swap_eyes, Settings::values.swap_eyes,
+                                            swap_eyes);
     ConfigurationShared::SetColoredTristate(ui->toggle_upright_screen,
                                             Settings::values.upright_screen, upright_screen);
     ConfigurationShared::SetColoredTristate(ui->toggle_dump_textures,

src/citra_qt/configuration/configure_enhancements.h

@@ -45,5 +45,6 @@ private:
     ConfigurationShared::CheckState custom_textures;
     ConfigurationShared::CheckState preload_textures;
     ConfigurationShared::CheckState async_custom_loading;
+    ConfigurationShared::CheckState swap_eyes;
     QColor bg_color;
 };

src/citra_qt/configuration/configure_enhancements.ui

@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>440</width>
-    <height>748</height>
+    <height>781</height>
    </rect>
   </property>
   <property name="minimumSize">
@@ -199,11 +199,11 @@
              <string>xBRZ</string>
             </property>
            </item>
-            <item>
-              <property name="text">
-                <string>MMPX</string>
-              </property>
-            </item>
+           <item>
+            <property name="text">
+             <string>MMPX</string>
+            </property>
+           </item>
           </widget>
          </item>
         </layout>
@@ -239,6 +239,11 @@
             <string>Side by Side</string>
            </property>
           </item>
+          <item>
+           <property name="text">
+            <string>Top Bottom</string>
+           </property>
+          </item>
           <item>
            <property name="text">
             <string>Anaglyph</string>
@@ -249,11 +254,6 @@
             <string>Interlaced</string>
            </property>
           </item>
-          <item>
-           <property name="text">
-            <string>Reverse Interlaced</string>
-           </property>
-          </item>
          </widget>
         </item>
        </layout>
@@ -288,26 +288,12 @@
       <item>
        <layout class="QHBoxLayout" name="horizontalLayout_9">
         <item>
-         <widget class="QLabel" name="label_6">
+         <widget class="QCheckBox" name="toggle_swap_eyes">
           <property name="text">
-           <string>Eye to Render in Monoscopic Mode</string>
+           <string>Swap Eyes</string>
           </property>
          </widget>
         </item>
-        <item>
-         <widget class="QComboBox" name="mono_rendering_eye">
-          <item>
-           <property name="text">
-            <string>Left Eye (default)</string>
-           </property>
-          </item>
-          <item>
-           <property name="text">
-            <string>Right Eye</string>
-           </property>
-          </item>
-         </widget>
-        </item>
        </layout>
       </item>
      </layout>
@@ -539,7 +525,6 @@
   <tabstop>texture_filter_combobox</tabstop>
   <tabstop>render_3d_combobox</tabstop>
   <tabstop>factor_3d</tabstop>
-  <tabstop>mono_rendering_eye</tabstop>
   <tabstop>layout_combobox</tabstop>
   <tabstop>toggle_swap_screen</tabstop>
   <tabstop>toggle_upright_screen</tabstop>

src/citra_qt/main.cpp

@@ -627,6 +627,8 @@ void GMainWindow::InitializeHotkeys() {
         Settings::values.frame_limit.SetGlobal(!Settings::values.frame_limit.UsingGlobal());
         UpdateStatusBar();
     });
+    connect_shortcut(QStringLiteral("Swap Eyes"),
+                     [&] { Settings::values.swap_eyes = !Settings::values.swap_eyes; });
     connect_shortcut(QStringLiteral("Toggle Texture Dumping"),
                      [&] { Settings::values.dump_textures = !Settings::values.dump_textures; });
     connect_shortcut(QStringLiteral("Toggle Custom Textures"),
@@ -2482,18 +2484,24 @@ void GMainWindow::OnMouseActivity() {
     ShowMouseCursor();
 }
 
-void GMainWindow::mouseMoveEvent([[maybe_unused]] QMouseEvent* event) {
+void GMainWindow::mouseMoveEvent(QMouseEvent*) {
     OnMouseActivity();
 }
 
-void GMainWindow::mousePressEvent([[maybe_unused]] QMouseEvent* event) {
+void GMainWindow::mousePressEvent(QMouseEvent*) {
     OnMouseActivity();
 }
 
-void GMainWindow::mouseReleaseEvent([[maybe_unused]] QMouseEvent* event) {
+void GMainWindow::mouseReleaseEvent(QMouseEvent*) {
     OnMouseActivity();
 }
 
+void GMainWindow::moveEvent(QMoveEvent* event) {
+    QMainWindow::moveEvent(event);
+    const auto screen_pos = Common::MakeVec(pos().x(), pos().y());
+    render_window->SetScreenPos(screen_pos);
+}
+
 void GMainWindow::OnCoreError(Core::System::ResultStatus result, std::string details) {
     QString status_message;
 

src/citra_qt/main.h

@@ -374,6 +374,7 @@ protected:
     void mouseMoveEvent(QMouseEvent* event) override;
     void mousePressEvent(QMouseEvent* event) override;
     void mouseReleaseEvent(QMouseEvent* event) override;
+    void moveEvent(QMoveEvent* event) override;
 };
 
 Q_DECLARE_METATYPE(std::size_t);

src/common/settings.cpp

@@ -84,7 +84,7 @@ void LogSettings() {
     log_setting("Renderer_TextureFilter", GetTextureFilterName(values.texture_filter.GetValue()));
     log_setting("Stereoscopy_Render3d", values.render_3d.GetValue());
     log_setting("Stereoscopy_Factor3d", values.factor_3d.GetValue());
-    log_setting("Stereoscopy_MonoRenderOption", values.mono_render_option.GetValue());
+    log_setting("Stereoscopy_SwapEyes", values.swap_eyes.GetValue());
     if (values.render_3d.GetValue() == StereoRenderOption::Anaglyph) {
         log_setting("Renderer_AnaglyphShader", values.anaglyph_shader_name.GetValue());
     }

src/common/settings.h

@@ -49,19 +49,12 @@ enum class LayoutOption : u32 {
 enum class StereoRenderOption : u32 {
     Off = 0,
     SideBySide = 1,
-    Anaglyph = 2,
-    Interlaced = 3,
-    ReverseInterlaced = 4,
+    TopBottom = 2,
+    Anaglyph = 3,
+    Interlaced = 4,
     CardboardVR = 5
 };
 
-// Which eye to render when 3d is off. 800px wide mode could be added here in the future, when
-// implemented
-enum class MonoRenderOption : u32 {
-    LeftEye = 0,
-    RightEye = 1,
-};
-
 enum class AudioEmulation : u32 {
     HLE = 0,
     LLE = 1,
@@ -467,8 +460,7 @@ struct Values {
 
     SwitchableSetting<StereoRenderOption> render_3d{StereoRenderOption::Off, "render_3d"};
     SwitchableSetting<u32> factor_3d{0, "factor_3d"};
-    SwitchableSetting<MonoRenderOption> mono_render_option{MonoRenderOption::LeftEye,
-                                                           "mono_render_option"};
+    SwitchableSetting<bool> swap_eyes{false, "swap_eyes"};
 
     Setting<u32> cardboard_screen_size{85, "cardboard_screen_size"};
     Setting<s32> cardboard_x_shift{0, "cardboard_x_shift"};

src/core/frontend/emu_window.cpp

@@ -73,6 +73,13 @@ bool EmuWindow::IsWithinTouchscreen(const Layout::FramebufferLayout& layout, uns
                   framebuffer_x < layout.bottom_screen.right / 2) ||
                  (framebuffer_x >= (layout.bottom_screen.left / 2) + (layout.width / 2) &&
                   framebuffer_x < (layout.bottom_screen.right / 2) + (layout.width / 2))));
+    } else if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::TopBottom) {
+        return framebuffer_x >= layout.bottom_screen.left &&
+               framebuffer_x < layout.bottom_screen.right &&
+               ((framebuffer_y >= layout.bottom_screen.top / 2 &&
+                 framebuffer_y < layout.bottom_screen.bottom / 2) ||
+                (framebuffer_y >= (layout.bottom_screen.top / 2) + (layout.height / 2) &&
+                 framebuffer_y < (layout.bottom_screen.bottom / 2) + (layout.height / 2)));
     } else if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::CardboardVR) {
         return (framebuffer_y >= layout.bottom_screen.top &&
                 framebuffer_y < layout.bottom_screen.bottom &&
@@ -91,22 +98,35 @@ bool EmuWindow::IsWithinTouchscreen(const Layout::FramebufferLayout& layout, uns
 
 std::tuple<unsigned, unsigned> EmuWindow::ClipToTouchScreen(unsigned new_x, unsigned new_y) const {
     if (new_x >= framebuffer_layout.width / 2) {
-        if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::SideBySide)
+        if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::SideBySide) {
             new_x -= framebuffer_layout.width / 2;
-        else if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::CardboardVR)
+        } else if (Settings::values.render_3d.GetValue() ==
+                   Settings::StereoRenderOption::CardboardVR) {
             new_x -=
                 (framebuffer_layout.width / 2) - (framebuffer_layout.cardboard.user_x_shift * 2);
+        }
     }
-    if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::SideBySide) {
-        new_x = std::max(new_x, framebuffer_layout.bottom_screen.left / 2);
-        new_x = std::min(new_x, framebuffer_layout.bottom_screen.right / 2 - 1);
-    } else {
-        new_x = std::max(new_x, framebuffer_layout.bottom_screen.left);
-        new_x = std::min(new_x, framebuffer_layout.bottom_screen.right - 1);
+    if (new_y >= framebuffer_layout.height / 2) {
+        if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::TopBottom) {
+            new_y -= framebuffer_layout.height / 2;
+        }
     }
 
-    new_y = std::max(new_y, framebuffer_layout.bottom_screen.top);
-    new_y = std::min(new_y, framebuffer_layout.bottom_screen.bottom - 1);
+    if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::SideBySide) {
+        new_x = std::clamp(new_x, framebuffer_layout.bottom_screen.left / 2,
+                           framebuffer_layout.bottom_screen.right / 2 - 1);
+    } else {
+        new_x = std::clamp(new_x, framebuffer_layout.bottom_screen.left,
+                           framebuffer_layout.bottom_screen.right - 1);
+    }
+
+    if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::TopBottom) {
+        new_y = std::clamp(new_y, framebuffer_layout.bottom_screen.top / 2,
+                           framebuffer_layout.bottom_screen.bottom / 2 - 1);
+    } else {
+        new_y = std::clamp(new_y, framebuffer_layout.bottom_screen.top,
+                           framebuffer_layout.bottom_screen.bottom - 1);
+    }
 
     return std::make_tuple(new_x, new_y);
 }
@@ -122,17 +142,25 @@ void EmuWindow::CreateTouchState() {
 }
 
 bool EmuWindow::TouchPressed(unsigned framebuffer_x, unsigned framebuffer_y) {
-    if (!IsWithinTouchscreen(framebuffer_layout, framebuffer_x, framebuffer_y))
+    if (!IsWithinTouchscreen(framebuffer_layout, framebuffer_x, framebuffer_y)) {
         return false;
+    }
 
     if (framebuffer_x >= framebuffer_layout.width / 2) {
-        if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::SideBySide)
+        if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::SideBySide) {
             framebuffer_x -= framebuffer_layout.width / 2;
-        else if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::CardboardVR)
+        } else if (Settings::values.render_3d.GetValue() ==
+                   Settings::StereoRenderOption::CardboardVR) {
             framebuffer_x -=
                 (framebuffer_layout.width / 2) - (framebuffer_layout.cardboard.user_x_shift * 2);
+        }
     }
-    std::lock_guard guard(touch_state->mutex);
+    if (framebuffer_y >= framebuffer_layout.height / 2) {
+        if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::TopBottom) {
+            framebuffer_y -= framebuffer_layout.height / 2;
+        }
+    }
+    std::scoped_lock lock{touch_state->mutex};
     if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::SideBySide) {
         touch_state->touch_x =
             static_cast<float>(framebuffer_x - framebuffer_layout.bottom_screen.left / 2) /
@@ -143,9 +171,17 @@ bool EmuWindow::TouchPressed(unsigned framebuffer_x, unsigned framebuffer_y) {
             static_cast<float>(framebuffer_x - framebuffer_layout.bottom_screen.left) /
             (framebuffer_layout.bottom_screen.right - framebuffer_layout.bottom_screen.left);
     }
-    touch_state->touch_y =
-        static_cast<float>(framebuffer_y - framebuffer_layout.bottom_screen.top) /
-        (framebuffer_layout.bottom_screen.bottom - framebuffer_layout.bottom_screen.top);
+
+    if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::TopBottom) {
+        touch_state->touch_y =
+            static_cast<float>(framebuffer_y - framebuffer_layout.bottom_screen.top / 2) /
+            (framebuffer_layout.bottom_screen.bottom / 2 -
+             framebuffer_layout.bottom_screen.top / 2);
+    } else {
+        touch_state->touch_y =
+            static_cast<float>(framebuffer_y - framebuffer_layout.bottom_screen.top) /
+            (framebuffer_layout.bottom_screen.bottom - framebuffer_layout.bottom_screen.top);
+    }
 
     if (!framebuffer_layout.is_rotated) {
         std::swap(touch_state->touch_x, touch_state->touch_y);
@@ -157,18 +193,20 @@ bool EmuWindow::TouchPressed(unsigned framebuffer_x, unsigned framebuffer_y) {
 }
 
 void EmuWindow::TouchReleased() {
-    std::lock_guard guard{touch_state->mutex};
+    std::scoped_lock lock{touch_state->mutex};
     touch_state->touch_pressed = false;
     touch_state->touch_x = 0;
     touch_state->touch_y = 0;
 }
 
 void EmuWindow::TouchMoved(unsigned framebuffer_x, unsigned framebuffer_y) {
-    if (!touch_state->touch_pressed)
+    if (!touch_state->touch_pressed) {
         return;
+    }
 
-    if (!IsWithinTouchscreen(framebuffer_layout, framebuffer_x, framebuffer_y))
+    if (!IsWithinTouchscreen(framebuffer_layout, framebuffer_x, framebuffer_y)) {
         std::tie(framebuffer_x, framebuffer_y) = ClipToTouchScreen(framebuffer_x, framebuffer_y);
+    }
 
     TouchPressed(framebuffer_x, framebuffer_y);
 }

src/core/frontend/emu_window.h

@@ -9,6 +9,7 @@
 #include <utility>
 
 #include "common/common_types.h"
+#include "common/vector_math.h"
 #include "core/3ds.h"
 #include "core/frontend/framebuffer_layout.h"
 
@@ -217,6 +218,17 @@ public:
         config = val;
     }
 
+    /**
+     * Updates the position of the client window area relative to the origin of the host display.
+     */
+    void SetScreenPos(const Common::Vec2i pos) {
+        screen_pos = pos;
+    }
+
+    Common::Vec2i GetScreenPos() const {
+        return screen_pos;
+    }
+
     /**
      * Returns system information about the drawing area.
      */
@@ -274,6 +286,7 @@ protected:
     bool is_secondary{};
     bool strict_context_required{};
     WindowSystemInfo window_info;
+    Common::Vec2i screen_pos{};
 
 private:
     /**

src/core/frontend/framebuffer_layout.cpp

@@ -4,6 +4,7 @@
 
 #include <cmath>
 
+#include "common/alignment.h"
 #include "common/assert.h"
 #include "common/settings.h"
 #include "core/3ds.h"

src/core/telemetry_session.cpp

@@ -151,8 +151,8 @@ void TelemetrySession::AddInitialInfo(Loader::AppLoader& app_loader) {
              static_cast<int>(Settings::values.render_3d.GetValue()));
     AddField(Telemetry::FieldType::UserConfig, "Renderer_Factor3d",
              Settings::values.factor_3d.GetValue());
-    AddField(Telemetry::FieldType::UserConfig, "Renderer_MonoRenderOption",
-             static_cast<int>(Settings::values.mono_render_option.GetValue()));
+    AddField(Telemetry::FieldType::UserConfig, "Renderer_SwapEyes",
+             static_cast<int>(Settings::values.swap_eyes.GetValue()));
     AddField(Telemetry::FieldType::UserConfig, "System_IsNew3ds",
              Settings::values.is_new_3ds.GetValue());
     AddField(Telemetry::FieldType::UserConfig, "System_RegionValue",

src/video_core/host_shaders/CMakeLists.txt

@@ -103,4 +103,4 @@ add_custom_target(host_shaders
         ${SHADER_HEADERS}
     SOURCES
         ${SHADER_SOURCES}
-)
+)

src/video_core/host_shaders/opengl_present_anaglyph.frag

@@ -4,17 +4,16 @@
 
 //? #version 430 core
 
-// Anaglyph Red-Cyan shader based on Dubois algorithm
-// Constants taken from the paper:
-// "Conversion of a Stereo Pair to Anaglyph with
-// the Least-Squares Projection Method"
-// Eric Dubois, March 2009
-const mat3 l = mat3( 0.437, 0.449, 0.164,
-              -0.062,-0.062,-0.024,
-              -0.048,-0.050,-0.017);
-const mat3 r = mat3(-0.011,-0.032,-0.007,
-               0.377, 0.761, 0.009,
-              -0.026,-0.093, 1.234);
+// https://cybereality.com/rendepth-red-cyan-anaglyph-filter-optimized-for-stereoscopic-3d-on-lcd-monitors/
+const mat3 left_filter = mat3(
+        vec3(0.4561, 0.500484, 0.176381),
+        vec3(-0.400822, -0.0378246, -0.0157589),
+        vec3(-0.0152161, -0.0205971, -0.00546856));
+
+const mat3 right_filter = mat3(
+        vec3(-0.0434706, -0.0879388, -0.00155529),
+        vec3(0.378476, 0.73364, -0.0184503),
+        vec3(-0.0721527, -0.112961, 1.2264));
 
 layout(location = 0) in vec2 frag_tex_coord;
 layout(location = 0) out vec4 color;
@@ -24,9 +23,22 @@ layout(binding = 1) uniform sampler2D color_texture_r;
 
 uniform vec4 resolution;
 uniform int layer;
+uniform bool swap_eyes;
+
+const vec3 gamma_map = vec3(1.6, 0.8, 1.0);
+
+vec3 correct_color(vec3 original) {
+    vec3 corrected;
+    corrected.r = pow(original.r, 1.0 / gamma_map.r);
+    corrected.g = pow(original.g, 1.0 / gamma_map.g);
+    corrected.b = pow(original.b, 1.0 / gamma_map.b);
+    return corrected;
+}
 
 void main() {
-    vec4 color_tex_l = texture(color_texture, frag_tex_coord);
-    vec4 color_tex_r = texture(color_texture_r, frag_tex_coord);
-    color = vec4(color_tex_l.rgb*l+color_tex_r.rgb*r, color_tex_l.a);
+    vec4 color_left = texture(color_texture, frag_tex_coord);
+    vec4 color_right = texture(color_texture_r, frag_tex_coord);
+    vec3 optimized_color = clamp(color_left.rgb * (swap_eyes ? right_filter : left_filter), vec3(0.0), vec3(1.0)) +
+                           clamp(color_right.rgb * (swap_eyes ? left_filter : right_filter), vec3(0.0), vec3(1.0));
+    color = vec4(correct_color(optimized_color), color_left.a);
 }

src/video_core/host_shaders/opengl_present_interlaced.frag

@@ -7,16 +7,22 @@
 layout(location = 0) in vec2 frag_tex_coord;
 layout(location = 0) out vec4 color;
 
-layout(binding = 0) uniform sampler2D color_texture;
+layout(binding = 0) uniform sampler2D color_texture_l;
 layout(binding = 1) uniform sampler2D color_texture_r;
 
 uniform vec4 o_resolution;
-uniform int reverse_interlaced;
+uniform ivec2 screen_pos;
+uniform bool swap_eyes;
 
 void main() {
     float screen_row = o_resolution.x * frag_tex_coord.x;
-    if (int(screen_row) % 2 == reverse_interlaced)
-        color = texture(color_texture, frag_tex_coord);
-    else
+    bool is_even = screen_pos.y % 2 == 0;
+    if (swap_eyes) {
+        is_even = !is_even;
+    }
+    if (int(screen_row) % 2 == int(is_even)) {
+        color = texture(color_texture_l, frag_tex_coord);
+    } else {
         color = texture(color_texture_r, frag_tex_coord);
+    }
 }

src/video_core/renderer_opengl/post_processing_opengl.cpp

@@ -49,6 +49,8 @@ uniform float4 i_resolution;
 uniform float4 o_resolution;
 // Layer
 uniform int layer;
+// Screen position
+uniform int2 screen_pos;
 
 uniform sampler2D color_texture;
 uniform sampler2D color_texture_r;
@@ -119,6 +121,11 @@ float2 GetCoordinates()
     return frag_tex_coord;
 }
 
+int2 GetScreenPos()
+{
+    return screen_pos;
+}
+
 void SetOutput(float4 color_in)
 {
     color = color_in;

src/video_core/renderer_opengl/renderer_opengl.cpp

@@ -54,8 +54,7 @@ struct ScreenRectVertex {
  *
  * @param flipped Whether the frame should be flipped upside down.
  */
-static std::array<GLfloat, 3 * 2> MakeOrthographicMatrix(const float width, const float height,
-                                                         bool flipped) {
+static std::array<GLfloat, 3 * 2> MakeOrthographicMatrix(u32 width, u32 height, bool flipped) {
 
     std::array<GLfloat, 3 * 2> matrix; // Laid out in column-major order
 
@@ -405,9 +404,7 @@ void RendererOpenGL::ReloadShader() {
                 shader_data += shader_text;
             }
         }
-    } else if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::Interlaced ||
-               Settings::values.render_3d.GetValue() ==
-                   Settings::StereoRenderOption::ReverseInterlaced) {
+    } else if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::Interlaced) {
         shader_data += HostShaders::OPENGL_PRESENT_INTERLACED_FRAG;
     } else {
         if (Settings::values.pp_shader_name.GetValue() == "none (builtin)") {
@@ -429,23 +426,14 @@ void RendererOpenGL::ReloadShader() {
     uniform_modelview_matrix = glGetUniformLocation(shader.handle, "modelview_matrix");
     uniform_color_texture = glGetUniformLocation(shader.handle, "color_texture");
     if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::Anaglyph ||
-        Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::Interlaced ||
-        Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::ReverseInterlaced) {
+        Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::Interlaced) {
+        uniform_swap_eyes = glGetUniformLocation(shader.handle, "swap_eyes");
         uniform_color_texture_r = glGetUniformLocation(shader.handle, "color_texture_r");
     }
-    if (Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::Interlaced ||
-        Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::ReverseInterlaced) {
-        GLuint uniform_reverse_interlaced =
-            glGetUniformLocation(shader.handle, "reverse_interlaced");
-        if (Settings::values.render_3d.GetValue() ==
-            Settings::StereoRenderOption::ReverseInterlaced)
-            glUniform1i(uniform_reverse_interlaced, 1);
-        else
-            glUniform1i(uniform_reverse_interlaced, 0);
-    }
     uniform_i_resolution = glGetUniformLocation(shader.handle, "i_resolution");
     uniform_o_resolution = glGetUniformLocation(shader.handle, "o_resolution");
     uniform_layer = glGetUniformLocation(shader.handle, "layer");
+    uniform_screen_pos = glGetUniformLocation(shader.handle, "screen_pos");
     attrib_position = glGetAttribLocation(shader.handle, "vert_position");
     attrib_tex_coord = glGetAttribLocation(shader.handle, "vert_tex_coord");
 }
@@ -678,8 +666,7 @@ void RendererOpenGL::DrawScreens(const Layout::FramebufferLayout& layout, bool f
     glClear(GL_COLOR_BUFFER_BIT);
 
     // Set projection matrix
-    std::array<GLfloat, 3 * 2> ortho_matrix =
-        MakeOrthographicMatrix((float)layout.width, (float)layout.height, flipped);
+    const auto ortho_matrix = MakeOrthographicMatrix(layout.width, layout.height, flipped);
     glUniformMatrix3x2fv(uniform_modelview_matrix, 1, GL_FALSE, ortho_matrix.data());
 
     // Bind texture in Texture Unit 0
@@ -687,8 +674,12 @@ void RendererOpenGL::DrawScreens(const Layout::FramebufferLayout& layout, bool f
 
     const bool stereo_single_screen =
         Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::Anaglyph ||
-        Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::Interlaced ||
-        Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::ReverseInterlaced;
+        Settings::values.render_3d.GetValue() == Settings::StereoRenderOption::Interlaced;
+
+    // Set the screen position
+    const auto screen_pos = render_window.GetScreenPos() +
+                            Common::MakeVec<s32>(layout.top_screen.left, layout.top_screen.bottom);
+    glUniform2i(uniform_screen_pos, screen_pos.x, screen_pos.y);
 
     // Bind a second texture for the right eye if in Anaglyph mode
     if (stereo_single_screen) {
@@ -756,7 +747,7 @@ void RendererOpenGL::DrawTopScreen(const Layout::FramebufferLayout& layout,
                                                : Layout::DisplayOrientation::Portrait;
     switch (Settings::values.render_3d.GetValue()) {
     case Settings::StereoRenderOption::Off: {
-        const int eye = static_cast<int>(Settings::values.mono_render_option.GetValue());
+        const u32 eye = static_cast<u32>(Settings::values.swap_eyes.GetValue());
         DrawSingleScreen(screen_infos[eye], top_screen_left, top_screen_top, top_screen_width,
                          top_screen_height, orientation);
         break;
@@ -770,6 +761,15 @@ void RendererOpenGL::DrawTopScreen(const Layout::FramebufferLayout& layout,
                          top_screen_top, top_screen_width / 2, top_screen_height, orientation);
         break;
     }
+    case Settings::StereoRenderOption::TopBottom: {
+        DrawSingleScreen(screen_infos[0], top_screen_left, top_screen_top / 2, top_screen_width,
+                         top_screen_height / 2, orientation);
+        glUniform1i(uniform_layer, 1);
+        DrawSingleScreen(screen_infos[1], top_screen_left,
+                         static_cast<float>((top_screen_top / 2) + (layout.height / 2)),
+                         top_screen_width, top_screen_height / 2, orientation);
+        break;
+    }
     case Settings::StereoRenderOption::CardboardVR: {
         DrawSingleScreen(screen_infos[0], top_screen_left, top_screen_top, top_screen_width,
                          top_screen_height, orientation);
@@ -781,8 +781,8 @@ void RendererOpenGL::DrawTopScreen(const Layout::FramebufferLayout& layout,
         break;
     }
     case Settings::StereoRenderOption::Anaglyph:
-    case Settings::StereoRenderOption::Interlaced:
-    case Settings::StereoRenderOption::ReverseInterlaced: {
+    case Settings::StereoRenderOption::Interlaced: {
+        glUniform1i(uniform_swap_eyes, Settings::values.swap_eyes.GetValue());
         DrawSingleScreenStereo(screen_infos[0], screen_infos[1], top_screen_left, top_screen_top,
                                top_screen_width, top_screen_height, orientation);
         break;
@@ -803,8 +803,17 @@ void RendererOpenGL::DrawBottomScreen(const Layout::FramebufferLayout& layout,
 
     const auto orientation = layout.is_rotated ? Layout::DisplayOrientation::Landscape
                                                : Layout::DisplayOrientation::Portrait;
+    const auto render_3d =
+#ifndef ANDROID
+        Settings::values.layout_option.GetValue() == Settings::LayoutOption::SeparateWindows &&
+                Settings::values.render_3d.GetValue() != Settings::StereoRenderOption::Anaglyph
+            ? Settings::StereoRenderOption::Off
+            : Settings::values.render_3d.GetValue();
+#else
+        const auto render_3d = Settings::values.render_3d.GetValue();
+#endif
 
-    switch (Settings::values.render_3d.GetValue()) {
+    switch (render_3d) {
     case Settings::StereoRenderOption::Off: {
         DrawSingleScreen(screen_infos[2], bottom_screen_left, bottom_screen_top,
                          bottom_screen_width, bottom_screen_height, orientation);
@@ -819,6 +828,15 @@ void RendererOpenGL::DrawBottomScreen(const Layout::FramebufferLayout& layout,
             bottom_screen_top, bottom_screen_width / 2, bottom_screen_height, orientation);
         break;
     }
+    case Settings::StereoRenderOption::TopBottom: {
+        DrawSingleScreen(screen_infos[2], bottom_screen_left, bottom_screen_top / 2,
+                         bottom_screen_width, bottom_screen_height / 2, orientation);
+        glUniform1i(uniform_layer, 1);
+        DrawSingleScreen(screen_infos[2], bottom_screen_left,
+                         static_cast<float>((bottom_screen_top / 2) + (layout.height / 2)),
+                         bottom_screen_width, bottom_screen_height / 2, orientation);
+        break;
+    }
     case Settings::StereoRenderOption::CardboardVR: {
         DrawSingleScreen(screen_infos[2], bottom_screen_left, bottom_screen_top,
                          bottom_screen_width, bottom_screen_height, orientation);
@@ -830,8 +848,8 @@ void RendererOpenGL::DrawBottomScreen(const Layout::FramebufferLayout& layout,
         break;
     }
     case Settings::StereoRenderOption::Anaglyph:
-    case Settings::StereoRenderOption::Interlaced:
-    case Settings::StereoRenderOption::ReverseInterlaced: {
+    case Settings::StereoRenderOption::Interlaced: {
+        glUniform1i(uniform_swap_eyes, Settings::values.swap_eyes.GetValue());
         DrawSingleScreenStereo(screen_infos[2], screen_infos[2], bottom_screen_left,
                                bottom_screen_top, bottom_screen_width, bottom_screen_height,
                                orientation);

src/video_core/renderer_opengl/renderer_opengl.h

@@ -103,11 +103,13 @@ private:
     GLuint uniform_modelview_matrix;
     GLuint uniform_color_texture;
     GLuint uniform_color_texture_r;
+    GLuint uniform_swap_eyes;
 
     // Shader uniform for Dolphin compatibility
     GLuint uniform_i_resolution;
     GLuint uniform_o_resolution;
     GLuint uniform_layer;
+    GLuint uniform_screen_pos;
 
     // Shader attribute input indices
     GLuint attrib_position;