feat(platform): Fix high-DPI scaling and add resolution option

- Fixed a 'squished' viewport bug on high-DPI (Retina) displays by querying the framebuffer size in pixels instead of using the window size in points.
- Centralized window dimension management within the platform layer.
- Added a '--resolution WxH' command-line option to allow specifying a custom window size at startup. This option is stripped in STRIP_ALL builds.
- Updated all test and tool executables to use the new platform API.

1 files changed, 13 insertions, 8 deletions

diff --git a/src/main.cc b/src/main.cc
index 8cedfce..f7136ef 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -130,7 +130,10 @@ float* generate_tone(float* buffer, float freq) {
 
 int main(int argc, char** argv) {
   bool fullscreen_enabled = false;
-  double seek_time = 0.0;
+  float seek_time = 0.0f;
+  int* width_ptr = nullptr;
+  int* height_ptr = nullptr;
+  int custom_width, custom_height;
 
 #if !defined(STRIP_ALL)
   for (int i = 1; i < argc; ++i) {
@@ -139,6 +142,12 @@ int main(int argc, char** argv) {
     } else if (strcmp(argv[i], "--seek") == 0 && i + 1 < argc) {
       seek_time = atof(argv[i + 1]);
       ++i;
+    } else if (strcmp(argv[i], "--resolution") == 0 && i + 1 < argc) {
+      const char* res_str = argv[++i];
+      if (sscanf(res_str, "%dx%d", &custom_width, &custom_height) == 2) {
+        width_ptr = &custom_width;
+        height_ptr = &custom_height;
+      }
     }
   }
 #else
@@ -147,10 +156,8 @@ int main(int argc, char** argv) {
   fullscreen_enabled = true;
 #endif /* STRIP_ALL */
 
-  platform_init_window(fullscreen_enabled);
-  int width, height;
-  glfwGetFramebufferSize(platform_get_window(), &width, &height);
-  gpu_init(platform_get_window(), width, height);
+  platform_init_window(fullscreen_enabled, width_ptr, height_ptr);
+  gpu_init(platform_get_window(), platform_get_width(), platform_get_height());
   audio_init();
 
   // Register drum assets
@@ -234,9 +241,7 @@ int main(int argc, char** argv) {
 
     update_game_logic(current_time);
 
-    int width, height;
-    glfwGetFramebufferSize(platform_get_window(), &width, &height);
-    float aspect_ratio = (float)width / (float)height;
+    float aspect_ratio = platform_get_aspect_ratio();
 
     // Adjusted multiplier for visuals (preventing constant 1.0 saturation)
     float raw_peak = synth_get_output_peak();