calculate help overlay width from text instead of hardcoding it

cudoku.c

@@ -13,7 +13,6 @@
 #include "audio.h"
 
 #define HELP_TEXT_SIZE 13
-#define HELP_OVERLAY_WIDTH 700
 
 static const float quad_vertices[] = {
   // positions     // texture coords
@@ -623,12 +622,14 @@ void draw_help_overlay(Shader overlay_shader, Shader font_shader, unsigned int o
   int const text_padding = 10;
   float const text_scale = 0.3f;
   int overlay_height = 0;
+  int overlay_width = 0;
 
   for (int i = 0; i < HELP_TEXT_SIZE; i++) {
     Size text_size = calculate_text_size(help_texts[i], text_scale);
     overlay_height += text_size.height + text_padding;
+    overlay_width = max(overlay_width, text_size.width + text_padding * 2);
   }
-Size size = {.width = HELP_OVERLAY_WIDTH, .height = overlay_height + 20};
+  Size size = {.width = overlay_width, .height = overlay_height + text_padding * 2};
   Vec2 pos = {
     .x = 0,
     .y = window_height - size.height
@@ -656,7 +657,7 @@ Size size = {.width = HELP_OVERLAY_WIDTH, .height = overlay_height + 20};
     snprintf(closing_in_text, sizeof(closing_in_text), "Hiding in %ds", (int)timer_remaining(timer) + 1);
     Size closing_in_text_size = calculate_text_size(closing_in_text, text_scale / 2.0);
     Vec2 closing_in_text_pos = {
-      .x = HELP_OVERLAY_WIDTH - closing_in_text_size.width,
+      .x = overlay_width - closing_in_text_size.width,
       .y = window_height - closing_in_text_size.height - text_padding,
     };
     Color closing_in_text_color = {

helper.c

@@ -1,14 +1,18 @@
 #include "helper.h"
 
-Matrix4x4 orthographic_projection_2d(float left, float right, float bottom, float top) {
+Matrix4x4 identity() {
-    Matrix4x4 result;
+    Matrix4x4 result = {0};
 
-    // Identity matrix
+    result.m[0][0] = 1.0f;
-    for (int i = 0; i < 4; i++) {
+    result.m[1][1] = 1.0f;
-        for (int j = 0; j < 4; j++) {
+    result.m[2][2] = 1.0f;
-            result.m[i][j] = 0.0f;
+    result.m[3][3] = 1.0f;
-        }
+
-    }
+    return result;
+}
+
+Matrix4x4 orthographic_projection_2d(float left, float right, float bottom, float top) {
+    Matrix4x4 result = identity();
 
     result.m[0][0] = 2.0f / (right - left);
     result.m[3][0] = -(right + left) / (right - left);
@@ -19,3 +23,7 @@ Matrix4x4 orthographic_projection_2d(float left, float right, float bottom, floa
 
     return result;
 }
+
+int max(int a, int b) {
+    return a > b ? a : b;
+}

helper.h

@@ -5,3 +5,4 @@ typedef struct {
 } Matrix4x4;
 
 Matrix4x4 orthographic_projection_2d(float left, float right, float bottom, float top);
+int max(int a, int b);