graphics: custom resolution for subscreen (#553)

## Link to GitHub Issue, if one exists
n/a

## Description of change
Allow user to specify a custom resolution for the sub monitor, in
addition to the existing refresh rate option

This would allow practically any touch monitor (including ones with
weird resolution / aspect ratio / refresh rate) to be used with
IIDX/SDVX.

## Testing
Tested with various resolution / refresh rate combinations on IIDX /
SDVX.

src/spice2x/launcher/launcher.cpp

@@ -1406,6 +1406,15 @@ int main_implementation(int argc, char *argv[]) {
         }
     }
 
+    if (options[launcher::Options::FullscreenSubResolution].is_active()) {
+        std::pair<uint32_t, uint32_t> result;
+        if (parse_width_height(options[launcher::Options::FullscreenSubResolution].value_text(), result)) {
+            GRAPHICS_FS_CUSTOM_RESOLUTION_SUB = result;
+        } else {
+            log_warning("launcher", "failed to parse -forceressub");
+        }
+    }
+
     // SDVXFullscreenLandscape disabled due to it messing with in-game camera angle
     // FullscreenOrientationFlip continues to live on, however.
     if (options[launcher::Options::SDVXFullscreenLandscape].value_bool() && !cfg::CONFIGURATOR_STANDALONE) {

src/spice2x/launcher/options.cpp

@@ -256,9 +256,21 @@ static const std::vector<OptionDefinition> OPTION_DEFINITIONS = {
         .hidden = true,
         .category = "Graphics (Full Screen)"
     },
+    {
+        // FullscreenSubResolution
+        .title = "Force FS Subscreen Resolution (EXPERIMENTAL)",
+        .name = "forceressub",
+        .desc =
+            "Override fullscreen resolution requested by the game for second monitor, "
+            "useful if you have a sub monitor that is not quite exactly what the game expects.\n\n"
+            "WARNING: experimental as we have not done extensive testing to see if this causes desyncs.",
+        .type = OptionType::Text,
+        .setting_name = "1280,720",
+        .category = "Graphics (Full Screen)"
+    },
     {
         // FullscreenSubRefreshRate
-        .title = "Force Submonitor Refresh Rate (EXPERIMENTAL)",
+        .title = "Force FS Subscreen Refresh Rate (EXPERIMENTAL)",
         .name = "graphics-force-refresh-sub",
         .desc =
             "Override fullscreen refresh rate requested by the game for second monitor, "
@@ -814,7 +826,7 @@ static const std::vector<OptionDefinition> OPTION_DEFINITIONS = {
         .category = "Game Options",
     },
     {
-        .title = "SDVX Native Touch Handling",
+        .title = "SDVX FS Subscreen Native Touch Handling",
         .name = "sdvxnativetouch",
         .desc = "Disables touch hooks and lets the game access a touch screen directly. "
                 "Requires a touch screen to be connected as a secondary monitor. "
@@ -824,6 +836,18 @@ static const std::vector<OptionDefinition> OPTION_DEFINITIONS = {
         .game_name = "Sound Voltex",
         .category = "Game Options (Advanced)",
     },
+    {
+        // spice2x_SDVXSubRedraw
+        .title = "SDVX FS Subscreen Force Redraw",
+        .name = "sp2x-sdvxsubredraw",
+        .display_name = "sdvxsubredraw",
+        .aliases= "sdvxsubredraw",
+        .desc = "Check if submonitor in fullscreen mode doesn't update every frame; "
+            "this option forces subscreen to redraw every frame.",
+        .type = OptionType::Bool,
+        .game_name = "Sound Voltex",
+        .category = "Game Options (Advanced)",
+    },
     {
         // spice2x_SDVXDigitalKnobSensitivity
         .title = "SDVX Digital Knob Sensitivity",
@@ -884,18 +908,6 @@ static const std::vector<OptionDefinition> OPTION_DEFINITIONS = {
             {"bottomright", "for landscape"},
         },
     },
-    {
-        // spice2x_SDVXSubRedraw
-        .title = "SDVX Subscreen Force Redraw",
-        .name = "sp2x-sdvxsubredraw",
-        .display_name = "sdvxsubredraw",
-        .aliases= "sdvxsubredraw",
-        .desc = "Check if second monitor for subscreen doesn't update every frame; "
-            "forces subscreen to redraw every frame, only needed for newer EG.",
-        .type = OptionType::Bool,
-        .game_name = "Sound Voltex",
-        .category = "Game Options (Advanced)",
-    },
     {
         .title = "Force Load DDR Module",
         .name = "ddr",
@@ -2251,7 +2263,7 @@ static const std::vector<OptionDefinition> OPTION_DEFINITIONS = {
     },
     {
         // spice2x_IIDXNativeTouch
-        .title = "IIDX Native Touch Handling",
+        .title = "IIDX TDJ Subscreen Native Touch Handling",
         .name = "sp2x-iidxnativetouch",
         .display_name = "iidxnativetouch",
         .aliases= "iidxnativetouch",

src/spice2x/launcher/options.h

@@ -31,6 +31,7 @@ namespace launcher {
             GraphicsForceRefresh,
             FullscreenResolution,
             FullscreenOrientationFlip,
+            FullscreenSubResolution,
             FullscreenSubRefreshRate,
             Graphics9On12,
             spice2x_Dx9On12,
@@ -85,11 +86,11 @@ namespace launcher {
             SDVXPrinterJPGQuality,
             SDVXDisableCameras,
             SDVXNativeTouch,
+            spice2x_SDVXSubRedraw,
             spice2x_SDVXDigitalKnobSensitivity,
             SDVXDigitalKnobSocd,
             spice2x_SDVXAsioDriver,
             spice2x_SDVXSubPos,
-            spice2x_SDVXSubRedraw,
             LoadDDRModule,
             DDR43Mode,
             DDRSkipCodecRegisteration,