fix(gpu): Add aspect ratio correction to shader

Implements aspect ratio correction to prevent the pulsating heptagon from being distorted when the window is resized.

- The main loop now queries the framebuffer size and calculates the aspect ratio each frame.

- This aspect ratio is passed to the GPU via an updated uniform buffer.

- The vertex shader in shader.wgsl now uses the aspect ratio to correctly scale the X coordinates of the vertices, ensuring the shape remains proportional.

1 files changed, 8 insertions, 1 deletions

diff --git a/src/main.cc b/src/main.cc
index ef48f21..e46468f 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -3,7 +3,9 @@
 #include "gpu/gpu.h"
 #include "platform.h"
 #include "util/math.h"
+#include <GLFW/glfw3.h>
 #include <math.h>
+#include <stdio.h>
 #include <string.h>
 
 #define DEMO_BPM 120.0f
@@ -75,7 +77,12 @@ int main(int argc, char **argv) {
       } 
     }
 
-    gpu_draw(synth_get_output_peak());
+    int width, height;
+    glfwGetFramebufferSize(platform_get_window(), &width, &height);
+    float aspect_ratio = (float)width / (float)height;
+
+    float visual_peak = fminf(synth_get_output_peak() * 80.0f, 1.0f);
+    gpu_draw(visual_peak, aspect_ratio);
     audio_update();
   }