main: Add FSR command line option and shortcut.

src/main.cpp

@@ -37,6 +37,7 @@ const struct option *gamescope_options = (struct option[]){
 	{ "output-width", required_argument, nullptr, 'W' },
 	{ "output-height", required_argument, nullptr, 'H' },
 	{ "nearest-neighbor-filter", no_argument, nullptr, 'n' },
+	{ "fsr-upscaling", no_argument, nullptr, 'U' },
 
 	// nested mode options
 	{ "nested-unfocused-refresh", required_argument, nullptr, 'o' },
@@ -85,6 +86,7 @@ const char usage[] =
 	"  -W, --output-width             output width\n"
 	"  -H, --output-height            output height\n"
 	"  -n, --nearest-neighbor-filter  use nearest neighbor filtering\n"
+	"  -U  --fsr-upscaling            use AMD FidelityFX™ Super Resolution 1.0 for upscaling"
 	"  --cursor                       path to default cursor image\n"
 	"  -R, --ready-fd                 notify FD when ready\n"
 	"  -T, --stats-path               write statistics to path\n"
@@ -116,6 +118,7 @@ const char usage[] =
 	"Keyboard shortcuts:\n"
 	"  Super + F                      toggle fullscreen\n"
 	"  Super + N                      toggle nearest neighbour filtering\n"
+	"  Super + U                      toggle FSR upscaling\n"
 	"  Super + S                      take a screenshot\n"
 	"";
 
@@ -135,6 +138,7 @@ bool g_bFullscreen = false;
 bool g_bIsNested = false;
 
 bool g_bFilterGameWindow = true;
+bool g_fsrUpscale = false;
 
 bool g_bBorderlessOutputWindow = false;
 
@@ -253,6 +257,9 @@ int main(int argc, char **argv)
 			case 'O':
 				g_sOutputName = optarg;
 				break;
+			case 'U':
+				g_fsrUpscale = true;
+				break;
 			case 0: // long options without a short option
 				opt_name = gamescope_options[opt_index].name;
 				if (strcmp(opt_name, "help") == 0) {

src/main.hpp

@@ -22,6 +22,8 @@ extern bool g_bFullscreen;
 
 extern bool g_bFilterGameWindow;
 
+extern bool g_fsrUpscale;
+
 extern bool g_bBorderlessOutputWindow;
 
 extern bool g_bNiceCap;

src/sdlwindow.cpp

@@ -152,6 +152,9 @@ void inputSDLThreadRun( void )
 						case KEY_N:
 							g_bFilterGameWindow = !g_bFilterGameWindow;
 							break;
+						case KEY_U:
+							g_fsrUpscale = !g_fsrUpscale;
+							break;
 						case KEY_S:
 							take_screenshot();
 							break;

src/steamcompmgr.cpp

@@ -1506,6 +1506,8 @@ paint_all()
 				}
 				// Just draw focused window as normal, be it Steam or the game
 				paint_window(w, w, &composite, &pipeline, global_focus.cursor, PaintWindowFlag::BasePlane | PaintWindowFlag::DrawBorders, 1.0f);
+
+				composite.useFSRLayer0 = g_fsrUpscale;
 			}
 			update_touch_scaling( &composite );
 		}