Follow-up fixes from PR #508 review

include/cute_app.h

@@ -369,23 +369,23 @@ CF_API int CF_CALL cf_app_draw_onto_screen(bool clear);
  * @brief    Gets the size of the window in logical points (called "points" on Retina/HiDPI displays; use `cf_app_get_pixel_scale` to convert to physical pixels).
  * @param    w          The width of the window in logical points.
  * @param    h          The height of the window in logical points.
- * @related  cf_app_set_size cf_app_get_position cf_app_set_position cf_app_get_width cf_app_get_height cf_app_get_dpi_scale
+ * @related  cf_app_set_size cf_app_get_position cf_app_set_position cf_app_get_width cf_app_get_height cf_app_get_dpi_scale cf_app_get_pixel_scale
  */
 CF_API void CF_CALL cf_app_get_size(int* w, int* h);
 
 /**
  * @function cf_app_get_width
  * @category app
  * @brief    Returns the size of the window width in logical points (use `cf_app_get_pixel_scale` to convert to physical pixels).
- * @related  cf_app_set_size cf_app_get_position cf_app_set_position cf_app_get_width cf_app_get_height cf_app_get_dpi_scale
+ * @related  cf_app_set_size cf_app_get_position cf_app_set_position cf_app_get_width cf_app_get_height cf_app_get_dpi_scale cf_app_get_pixel_scale
  */
 CF_API int CF_CALL cf_app_get_width(void);
 
 /**
  * @function cf_app_get_height
  * @category app
  * @brief    Returns the size of the window height in logical points (use `cf_app_get_pixel_scale` to convert to physical pixels).
- * @related  cf_app_set_size cf_app_get_position cf_app_set_position cf_app_get_width cf_app_get_height cf_app_get_dpi_scale
+ * @related  cf_app_set_size cf_app_get_position cf_app_set_position cf_app_get_width cf_app_get_height cf_app_get_dpi_scale cf_app_get_pixel_scale
  */
 CF_API int CF_CALL cf_app_get_height(void);
 

samples/window_resizing.cpp

@@ -116,7 +116,7 @@ int main(int argc, char* argv[])
 		// blit is 1:1 and stays crisp on HiDPI displays. The projection below
 		// stays in logical units, so game content doesn't move.
 		float pixel_scale = app_get_pixel_scale();
-		app_set_canvas_size((int)(window_w * pixel_scale), (int)(window_h * pixel_scale));
+		app_set_canvas_size((int)CF_ROUNDF(window_w * pixel_scale), (int)CF_ROUNDF(window_h * pixel_scale));
 		CF_V2 dest = calculate_dest_size(game_w, game_h, window_w, window_h, scale_mode);
 
 		// Draw the canvas scaled and centered in the window.

src/cute_app.cpp

@@ -756,7 +756,11 @@ bool cf_app_set_msaa(int sample_count)
 
 	if (supported && app->sample_count != sample_count) {
 		app->sample_count = sample_count;
-		cf_app_recreate_default_canvas_if_needed();
+		if (app->canvas_pinned) {
+			s_canvas(app->canvas_w, app->canvas_h);
+		} else {
+			cf_app_recreate_default_canvas_if_needed();
+		}
 	}
 
 	return supported;

src/cute_input.cpp

@@ -501,13 +501,16 @@ void cf_begin_frame_input()
 
 // Re-queries the window's physical pixel density and, if it changed, updates
 // app->pixel_scale and recreates the default canvas to match (unless pinned).
+// No-ops entirely when CF_APP_OPTIONS_NO_HIGH_DPI_BIT is set, since pixel_scale
+// must stay pinned at 1.0f in that mode.
 // Called from both SDL_EVENT_WINDOW_DISPLAY_SCALE_CHANGED and
 // SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED -- the former is the OS's content-scale
 // signal and the latter is the authoritative physical-pixel-size signal;
 // either can fire without the other depending on platform/monitor setup, so
 // both are handled the same way and this is idempotent when both fire together.
 static void s_refresh_pixel_scale()
 {
+	if (app->options & CF_APP_OPTIONS_NO_HIGH_DPI_BIT) return;
 	float pixel_scale = SDL_GetWindowPixelDensity(app->window);
 	if (pixel_scale <= 0.0f) pixel_scale = 1.0f;
 	if (pixel_scale != app->pixel_scale) {