graphics: option to change monitor resolution (#689)

## Link to GitHub Issue or related Pull Request, if one exists
n/a

## Description of change
Add a new option under `Monitor` group to change the monitor resolution
before booting the game, very similar to how orientation / refresh rate
options work.

This would be useful for games like Polaris Chord that boots at current
resolution but manages to have graphical issues when not in 1080p.

## Testing

src/spice2x/hooks/graphics/graphics.cpp

@@ -61,6 +61,7 @@ static std::condition_variable GRAPHICS_CAPTURE_CV[GRAPHICS_CAPTURE_SCREEN_NO] {
 
 static std::optional<graphics_orientation> target_orientation_on_boot;
 static UINT target_refresh_rate_on_boot = 0;
+static std::optional<std::pair<uint32_t, uint32_t>> target_resolution_on_boot;
 static bool monitor_settings_changed = false;
 static bool monitor_layout_needs_reset = false;
 
@@ -1279,8 +1280,13 @@ void change_primary_monitor(const std::string &monitor_name) {
     Sleep(2000);
 }
 
-void update_monitor(bool is_boot, std::optional<graphics_orientation> target_orientation, UINT target_refresh_rate) {
-    // note: all of this is only being done for the primary motnior
+void update_monitor(
+    bool is_boot,
+    std::optional<graphics_orientation> target_orientation,
+    UINT target_refresh_rate,
+    std::optional<std::pair<uint32_t, uint32_t>> target_resolution) {
+
+    // note: all of this is only being done for the primary monitor
 
     // get current settings
     DEVMODEA dm = {};
@@ -1358,6 +1364,22 @@ void update_monitor(bool is_boot, std::optional<graphics_orientation> target_ori
         needs_update = true;
     }
 
+    if (target_resolution.has_value()) {
+        if (dm.dmPelsWidth != target_resolution.value().first ||
+            dm.dmPelsHeight != target_resolution.value().second) {
+
+            log_misc(
+                "graphics",
+                "current resolution {}, {} => desired resolution {}, {}",
+                dm.dmPelsWidth, dm.dmPelsHeight,
+                target_resolution.value().first, target_resolution.value().second);
+
+            dm.dmPelsWidth = target_resolution.value().first;
+            dm.dmPelsHeight = target_resolution.value().second;
+            needs_update = true;
+        }
+    }
+
     if (!needs_update) {
         // nothing to do
         log_misc("graphics", "display settings are already up to date, no changes needed");
@@ -1394,17 +1416,30 @@ void update_monitor(bool is_boot, std::optional<graphics_orientation> target_ori
     }
 }
 
-void update_monitor_on_boot(std::optional<graphics_orientation> target_orientation, UINT target_refresh_rate) {
+void update_monitor_on_boot(
+    std::optional<graphics_orientation> target_orientation,
+    UINT target_refresh_rate,
+    std::optional<std::pair<uint32_t, uint32_t>> target_resolution) {
+
     target_orientation_on_boot = target_orientation;
     target_refresh_rate_on_boot = target_refresh_rate;
+    target_resolution_on_boot = target_resolution;
     log_misc("graphics", "applying monitor updates at boot...");
-    update_monitor(true, target_orientation, target_refresh_rate);
+    update_monitor(
+        true,
+        target_orientation,
+        target_refresh_rate,
+        target_resolution);
 }
 
 void update_monitor_at_runtime() {
     if (!GRAPHICS_WINDOWED && monitor_settings_changed) {
         log_misc("graphics", "applying monitor updates at runtime as window regained focus...");
-        update_monitor(false, target_orientation_on_boot, target_refresh_rate_on_boot);   
+        update_monitor(
+            false,
+            target_orientation_on_boot,
+            target_refresh_rate_on_boot,
+            target_resolution_on_boot);
     }
 }
 

src/spice2x/hooks/graphics/graphics.h

@@ -117,6 +117,10 @@ void graphics_load_windowed_subscreen_parameters();
 void graphics_window_check_bounds_before_creation(int &x, int &y, const int width, const int height);
 
 void change_primary_monitor(const std::string &monitor_name);
-void update_monitor_on_boot(std::optional<graphics_orientation> target_orientation, UINT target_refresh_rate);
+void update_monitor_on_boot(
+    std::optional<graphics_orientation> target_orientation,
+    UINT target_refresh_rate,
+    std::optional<std::pair<uint32_t, uint32_t>> target_resolution);
+
 void update_monitor_at_runtime();
 void reset_monitor_on_exit();

src/spice2x/launcher/launcher.cpp

@@ -385,6 +385,16 @@ int main_implementation(int argc, char *argv[]) {
         monitor_orientation = ORIENTATION_CW;
     }
 
+    std::optional<std::pair<uint32_t, uint32_t>> monitor_resolution;
+    if (options[launcher::Options::ChangeResolution].is_active()) {
+        std::pair<uint32_t, uint32_t> result;
+        if (parse_width_height(options[launcher::Options::ChangeResolution].value_text(), result)) {
+            monitor_resolution = result;
+        } else if (!cfg_run && !cfg::CONFIGURATOR_STANDALONE) {
+            log_fatal("launcher", "failed to parse -changeres");
+        }
+    }
+
     if (options[launcher::Options::spice2x_NoD3D9DeviceHook].value_bool()) {
         D3D9_DEVICE_HOOK_DISABLE = true;
         // touch emulation gets disabled, might as well turn these on
@@ -2189,7 +2199,7 @@ int main_implementation(int argc, char *argv[]) {
     if (options[launcher::Options::PrimaryMonitor].is_active()) {
         change_primary_monitor(options[launcher::Options::PrimaryMonitor].value_text());
     }
-    update_monitor_on_boot(monitor_orientation, GRAPHICS_FORCE_REFRESH);
+    update_monitor_on_boot(monitor_orientation, GRAPHICS_FORCE_REFRESH, monitor_resolution);
 
     // initialize raw input
     RI_MGR = std::make_unique<rawinput::RawInputManager>();

src/spice2x/launcher/options.cpp

@@ -1920,6 +1920,15 @@ static const std::vector<OptionDefinition> OPTION_DEFINITIONS = {
             {"3", "Landscape, Flipped"}
         },
     },
+    {
+        // ChangeResolution
+        .title = "Change Monitor Resolution",
+        .name = "changeres",
+        .desc = "Changes monitor resolution before booting the game.",
+        .type = OptionType::Text,
+        .setting_name = "1280,720",
+        .category = "Monitor"
+    },
     {
         .title = "AVS Log Level",
         .name = "loglevel",

src/spice2x/launcher/options.h

@@ -199,6 +199,7 @@ namespace launcher {
             LoadStubs,
             AdjustOrientation,
             spice2x_AutoOrientation,
+            ChangeResolution,
             LogLevel,
             EAAutomap,
             EANetdump,