Update core_highdpi_testbed.c

Author: raysan5

examples/core/core_highdpi_testbed.c

@@ -49,6 +49,7 @@ int main(void)
         scaleDpi = GetWindowScaleDPI();
 
         if (IsKeyPressed(KEY_SPACE)) ToggleBorderlessWindowed();
+        if (IsKeyPressed(KEY_F)) ToggleFullscreen();
         //----------------------------------------------------------------------------------
 
         // Draw
@@ -58,12 +59,12 @@ int main(void)
             ClearBackground(RAYWHITE);
 
             // Draw grid
-            for (int h = 0; h < 20; h++)
+            for (int h = 0; h < GetScreenHeight()/gridSpacing + 1; h++)
             {
                 DrawText(TextFormat("%02i", h*gridSpacing), 4, h*gridSpacing - 4, 10, GRAY);
                 DrawLine(24, h*gridSpacing, GetScreenWidth(), h*gridSpacing, LIGHTGRAY);
             }
-            for (int v = 0; v < 40; v++)
+            for (int v = 0; v < GetScreenWidth()/gridSpacing + 1; v++)
             {
                 DrawText(TextFormat("%02i", v*gridSpacing), v*gridSpacing - 10, 4, 10, GRAY);
                 DrawLine(v*gridSpacing, 20, v*gridSpacing, GetScreenHeight(), LIGHTGRAY);
@@ -76,6 +77,10 @@ int main(void)
             DrawText(TextFormat("RENDER SIZE: %ix%i", GetRenderWidth(), GetRenderHeight()), 50, 130, 20, DARKGRAY);
             DrawText(TextFormat("SCALE FACTOR: %.1fx%.1f", scaleDpi.x, scaleDpi.y), 50, 170, 20, GRAY);
 
+            // Draw reference rectangles, top-left and bottom-right corners
+            DrawRectangle(0, 0, 30, 60, RED);
+            DrawRectangle(GetScreenWidth() - 30, GetScreenHeight() - 60, 30, 60, BLUE);
+
             // Draw mouse position
             DrawCircleV(GetMousePosition(), 20, MAROON);
             DrawRectangle(mousePos.x - 25, mousePos.y, 50, 2, BLACK);