graphics: custom full screen resolution (#274)

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

## Description of change
Adds a new option to forcibly set the full screen resolution.

Same idea as -windowscale.

## Compiling
🔺 

## Testing
Seems to be showing similar results as -windowscale:

* Works GREAT for IIDX/SDVX
* popn launches at correct resolution but only draws a small image (at
native res) - can be scaled with F11 menu
* nostalgia is broken in weird ways, image is drawn correctly but bottom
`credits` text draws at wrong offset, game's wintouch logic broken
(perhaps expectedly)

## Other notes
In theory this could enable "play sdvx in landscape mode" option but the
image scaling doesn't quite work with extreme values.

src/spice2x/launcher/launcher.cpp

@@ -102,6 +102,7 @@
 #include "util/sysutils.h"
 #include "util/tapeled.h"
 #include "util/time.h"
+#include "util/utils.h"
 #include "avs/ssl.h"
 #include "nvapi/nvapi.h"
 #include "hooks/graphics/nvapi_hook.h"
@@ -366,6 +367,15 @@ int main_implementation(int argc, char *argv[]) {
         GRAPHICS_FORCE_SINGLE_ADAPTER = false;
     }
 
+    if (options[launcher::Options::FullscreenResolution].is_active()) {
+        std::pair<uint32_t, uint32_t> result;
+        if (parse_width_height(options[launcher::Options::FullscreenResolution].value_text(), result)) {
+            GRAPHICS_FS_CUSTOM_RESOLUTION = result;
+        } else {
+            log_warning("launcher", "failed to parse -forceres");
+        }
+    }
+
     if (options[launcher::Options::spice2x_NvapiProfile].value_bool() && !cfg::CONFIGURATOR_STANDALONE) {
         nvapi::ADD_PROFILE = true;
     }
@@ -952,12 +962,9 @@ int main_implementation(int argc, char *argv[]) {
         GRAPHICS_WINDOW_STYLE = options[launcher::Options::spice2x_WindowBorder].value_uint32();
     }
     if (options[launcher::Options::spice2x_WindowSize].is_active()) {
-        auto s = options[launcher::Options::spice2x_WindowSize].value_text();
-        uint32_t w, h;
-        const auto remove_spaces = [](const char& c) { return c == ' '; };
-        s.erase(std::remove_if(s.begin(), s.end(), remove_spaces), s.end());
-        if (sscanf(s.c_str(), "%u,%u", &w, &h) == 2) {
-            GRAPHICS_WINDOW_SIZE = std::pair(w, h);
+        std::pair<uint32_t, uint32_t> result;
+        if (parse_width_height(options[launcher::Options::spice2x_WindowSize].value_text(), result)) {
+            GRAPHICS_WINDOW_SIZE = result;
         } else {
             log_warning("launcher", "failed to parse -windowsize");
         }

src/spice2x/launcher/options.cpp

@@ -189,6 +189,14 @@ static const std::vector<OptionDefinition> OPTION_DEFINITIONS = {
         .type = OptionType::Integer,
         .category = "Graphics (Common)",
     },
+    {
+        .title = "Only Use One Monitor",
+        .name = "graphics-force-single-adapter",
+        .desc = "Force the graphics device to be opened utilizing only one adapter in multi-monitor systems.\n\n"
+            "May cause unstable framerate and desyncs, especially if monitors have different refresh rates!",
+        .type = OptionType::Bool,
+        .category = "Graphics (Common)",
+    },
     {
         .title = "Force Refresh Rate",
         .name = "graphics-force-refresh",
@@ -197,12 +205,16 @@ static const std::vector<OptionDefinition> OPTION_DEFINITIONS = {
         .category = "Graphics (Common)",
     },
     {
-        .title = "Only Use One Monitor",
-        .name = "graphics-force-single-adapter",
-        .desc = "Force the graphics device to be opened utilizing only one adapter in multi-monitor systems.\n\n"
-            "May cause unstable framerate and desyncs, especially if monitors have different refresh rates!",
-        .type = OptionType::Bool,
-        .category = "Graphics (Common)",
+        // FullscreenResolution
+        .title = "Force Full Screen Resolution",
+        .name = "forceres",
+        .desc =
+            "For full screen mode, forcibly set a custom resolution.\n\n"
+            "Works great for some games, but can COMPLETELY BREAK other games - YMMV!\n\n"
+            "This should only be used as last resort if your GPU/monitor can't display the resolution required by the game",
+        .type = OptionType::Text,
+        .setting_name = "1280,720",
+        .category = "Graphics (Common)"
     },
     {
         // Graphics9On12
@@ -1783,7 +1795,7 @@ static const std::vector<OptionDefinition> OPTION_DEFINITIONS = {
         .title = "Window Forced Render Scaling",
         .name = "windowscale",
         .desc = "For windowed mode: forcibly set DX9 back buffer dimensions to match window size. "
-            "Reduces pixelated scaling artifacts. Works great on some games, but completely broken on others",
+            "Reduces pixelated scaling artifacts. Works great for some games, but can COMPLETELY BREAK other games - YMMV!",
         .type = OptionType::Bool,
         .category = "Graphics (Windowed)",
     },

src/spice2x/launcher/options.h

@@ -27,8 +27,9 @@ namespace launcher {
             CaptureCursor,
             ShowCursor,
             DisplayAdapter,
-            GraphicsForceRefresh,
             GraphicsForceSingleAdapter,
+            GraphicsForceRefresh,
+            FullscreenResolution,
             Graphics9On12,
             spice2x_Dx9On12,
             NoLegacy,