Sdl backend (#670)

* [audio] added sdl audio backend and in-tree atrac9 decoder

* [input] replaced per-platform pad readers with sdl gamepad input

* [video] added sdl window and host display plumbing

* [gui] added host display options and per-game render settings

* [bink] synced host movie playback to the guest audio clock

* [cpu] hooked windows write faults into guest image tracking

* [perf] added guest and render profiling, reserved host cpu lanes

* [kernel] fixed stale pthread mutex handle alias

* [host] wired the sdl session, save-data paths and project references

* [audio] hoisted ajm trace stackalloc out of its loop

* [video] Add guest image sync setting

* [build] Strip native symbols

* reuse

src/SharpEmu.GUI/MainWindow.axaml

@@ -60,12 +60,6 @@ SPDX-License-Identifier: GPL-2.0-or-later
     <!-- Main content -->
     <Grid x:Name="MainContent" Grid.Row="1" Margin="32,24,32,20" RowDefinitions="Auto,*,Auto,Auto">
 
-      <!-- The game owns the full client area while running. Session controls
-           use a native popup so they can stay above this native child surface. -->
-      <Border x:Name="GameView" Grid.Row="0" Grid.RowSpan="4" IsVisible="False" Background="#000000" ClipToBounds="True">
-        <Grid x:Name="GameSurfaceContainer" />
-      </Border>
-
       <!-- Library / Options page switcher, with the library toolbar sharing
            the same row on the right. Plain buttons (not TabItem) so there is
            no underline; LB/RB hint chips flank the pair and the gamepad's
@@ -408,7 +402,6 @@ SPDX-License-Identifier: GPL-2.0-or-later
             <TabItem x:Name="GraphicsTabItem" Header="Graphics" FontSize="15">
               <ScrollViewer>
                 <StackPanel Margin="0,14,0,16" Spacing="16" MaxWidth="1280" HorizontalAlignment="Left">
-
                   <Border Classes="card">
                     <StackPanel Spacing="14">
                       <TextBlock x:Name="RenderingSectionTitle" Classes="sectionTitle" Text="RENDERING" />
@@ -425,6 +418,46 @@ SPDX-License-Identifier: GPL-2.0-or-later
                       </local:SettingRow>
                     </StackPanel>
                   </Border>
+
+                  <Border Classes="card">
+                    <StackPanel Spacing="14">
+                      <TextBlock x:Name="DisplaySectionTitle" Classes="sectionTitle" Text="DISPLAY" />
+                      <local:SettingRow x:Name="WindowModeRow" Label="Window mode" Description="Regular window, desktop borderless, or exclusive fullscreen.">
+                        <ComboBox x:Name="WindowModeBox" Width="180" SelectedIndex="0" CornerRadius="8">
+                          <ComboBoxItem Content="Windowed" />
+                          <ComboBoxItem Content="Borderless" />
+                          <ComboBoxItem Content="Exclusive" />
+                        </ComboBox>
+                      </local:SettingRow>
+                      <local:SettingRow x:Name="ResolutionRow" Label="Resolution" Description="Initial window size or exclusive fullscreen resolution.">
+                        <ComboBox x:Name="ResolutionBox" Width="180" CornerRadius="8" />
+                      </local:SettingRow>
+                      <local:SettingRow x:Name="DisplayRow" Label="Display" Description="Monitor used for centering and fullscreen.">
+                        <ComboBox x:Name="DisplayBox" Width="260" CornerRadius="8" />
+                      </local:SettingRow>
+                      <local:SettingRow x:Name="RefreshRateRow" Label="Refresh rate" Description="Exclusive fullscreen refresh rate. Automatic selects the closest mode.">
+                        <ComboBox x:Name="RefreshRateBox" Width="180" CornerRadius="8" />
+                      </local:SettingRow>
+                      <local:SettingRow x:Name="ScalingRow" Label="Scaling" Description="Scale the native guest image without changing its internal resolution.">
+                        <ComboBox x:Name="ScalingModeBox" Width="180" SelectedIndex="0" CornerRadius="8">
+                          <ComboBoxItem Content="Fit" />
+                          <ComboBoxItem Content="Cover" />
+                          <ComboBoxItem Content="Stretch" />
+                          <ComboBoxItem Content="Integer" />
+                        </ComboBox>
+                      </local:SettingRow>
+                      <local:SettingRow x:Name="VSyncRow" Label="VSync" Description="Use FIFO presentation for tear-free output.">
+                        <ToggleSwitch x:Name="VSyncToggle" IsChecked="True" OnContent="On" OffContent="Off" />
+                      </local:SettingRow>
+                      <local:SettingRow x:Name="HdrRow" Label="HDR" Description="Use HDR output when the selected display and graphics backend support it.">
+                        <ComboBox x:Name="HdrModeBox" Width="180" SelectedIndex="0" CornerRadius="8">
+                          <ComboBoxItem Content="Auto" />
+                          <ComboBoxItem Content="On" />
+                          <ComboBoxItem Content="Off" />
+                        </ComboBox>
+                      </local:SettingRow>
+                    </StackPanel>
+                  </Border>
                 </StackPanel>
               </ScrollViewer>
             </TabItem>
@@ -486,6 +519,12 @@ SPDX-License-Identifier: GPL-2.0-or-later
                         <ToggleSwitch x:Name="EnvLogNpToggle" OnContent="On" OffContent="Off"
                                       VerticalAlignment="Center" />
                       </local:SettingRow>
+
+                      <local:SettingRow x:Name="EnvGuestImageCpuSyncRow" LabelFontFamily="Consolas,monospace" Label="SHARPEMU_GUEST_IMAGE_CPU_SYNC"
+                                        Description="Re-upload guest surfaces the game's own CPU code rewrites.&#10;Enabled by default for compatibility.&#10;Disable only for titles that regress with it, such as GTA V.">
+                        <ToggleSwitch x:Name="EnvGuestImageCpuSyncToggle" OnContent="On" OffContent="Off"
+                                      VerticalAlignment="Center" />
+                      </local:SettingRow>
                     </StackPanel>
                   </Border>
 
@@ -595,51 +634,8 @@ SPDX-License-Identifier: GPL-2.0-or-later
       </Border>
     </Grid>
 
-    <!-- Avalonia's regular overlay layer cannot appear over a native child
-         HWND/X11/Metal surface. Keep the running-session controls in a native
-         popup so the game reaches the bottom status bar without losing Stop. -->
-    <primitives:Popup x:Name="SessionBarPopup"
-                      IsOpen="False"
-                      PlacementTarget="{Binding #GameView}"
-                      Placement="Bottom"
-                      VerticalOffset="-66"
-                      Topmost="True"
-                      ShouldUseOverlayLayer="False"
-                      TakesFocusFromNativeControl="False"
-                      IsLightDismissEnabled="False">
-      <Border Classes="card" Width="598" Height="58" CornerRadius="16" Padding="14,8">
-        <Grid ColumnDefinitions="*,Auto">
-          <StackPanel Spacing="3" VerticalAlignment="Center">
-            <StackPanel Orientation="Horizontal" Spacing="8">
-              <TextBlock x:Name="SessionGameTitle" Text="GAME RUNNING" FontSize="13" FontWeight="SemiBold"
-                         MaxWidth="240" TextTrimming="CharacterEllipsis" VerticalAlignment="Center" />
-              <Border Classes="badge running" VerticalAlignment="Center">
-                <TextBlock Text="RUNNING" FontSize="9" FontWeight="Bold" LetterSpacing="1"
-                           Foreground="{StaticResource SuccessBrush}" />
-              </Border>
-            </StackPanel>
-            <StackPanel Orientation="Horizontal" Spacing="7">
-              <Border x:Name="SessionF11Badge" Classes="badge key" VerticalAlignment="Center">
-                <TextBlock Text="F11" FontSize="9" FontWeight="Bold"
-                           Foreground="{StaticResource InfoBrush}" />
-              </Border>
-              <TextBlock x:Name="SessionHintText" Text="Fullscreen" FontSize="11"
-                         Foreground="{StaticResource MutedBrush}" VerticalAlignment="Center" />
-            </StackPanel>
-          </StackPanel>
-          <StackPanel Grid.Column="1" Orientation="Horizontal" Spacing="8" VerticalAlignment="Center">
-            <Button x:Name="SessionConsoleButton" Classes="ghost" Content="≡ Console" />
-            <Button x:Name="SessionStopButton" Classes="danger" Content="■  Stop" IsEnabled="False" />
-          </StackPanel>
-        </Grid>
-      </Border>
-    </primitives:Popup>
-
-    <!-- This is a native popup rather than an Avalonia overlay because the
-         emulated Vulkan surface is a native child window. -->
-    <!-- Anchored to MainContent, not GameView: the surface host is parked in
-         a 1x1 corner while loading/closing, which would pull a GameView-
-         anchored popup into the corner with it. -->
+    <!-- Keep launch progress above the blurred library while the SDL game
+         process owns its independent top-level window. -->
     <primitives:Popup x:Name="SessionLoadingPopup"
                       IsOpen="False"
                       PlacementTarget="{Binding #MainContent}"
@@ -653,7 +649,7 @@ SPDX-License-Identifier: GPL-2.0-or-later
           <TextBlock x:Name="SessionLoadingTitle" Text="Loading game" FontSize="16" FontWeight="SemiBold" />
           <TextBlock x:Name="SessionLoadingDetail" Text="Preparing the emulation session..." FontSize="12"
                      Foreground="{StaticResource MutedBrush}" TextTrimming="CharacterEllipsis" />
-          <ProgressBar IsIndeterminate="True" Height="5" />
+          <ProgressBar x:Name="SessionLoadingProgress" IsIndeterminate="True" Height="5" />
         </StackPanel>
       </Border>
     </primitives:Popup>