+ if (overlay.grid_button[x][y] == CHAR_GRID_BUTTON_NONE)
+ SDL_RenderDrawRect(sdl_renderer, &rect);
+ }
+ }
+
+ SDL_SetRenderDrawColor(sdl_renderer, 0, 0, 0, 255);
+}
+
+static void DrawTouchInputOverlay_ShowGridButtons(int alpha)
+{
+ static int alpha_max = SDL_ALPHA_OPAQUE / 2;
+ static int alpha_step = 5;
+ static int alpha_direction = 0;
+ static int alpha_highlight = 0;
+ SDL_Rect rect;
+ int grid_xsize = overlay.grid_xsize;
+ int grid_ysize = overlay.grid_ysize;
+ int x, y;
+
+ if (alpha == alpha_max)
+ {
+ if (alpha_direction < 0)
+ {
+ alpha_highlight = MAX(0, alpha_highlight - alpha_step);
+
+ if (alpha_highlight == 0)
+ alpha_direction = 1;
+ }
+ else
+ {
+ alpha_highlight = MIN(alpha_highlight + alpha_step, alpha_max);
+
+ if (alpha_highlight == alpha_max)
+ alpha_direction = -1;
+ }
+ }
+ else
+ {
+ alpha_direction = 1;
+ alpha_highlight = alpha;
+ }
+
+ SDL_SetRenderDrawBlendMode(sdl_renderer, SDL_BLENDMODE_BLEND);
+
+ for (x = 0; x < grid_xsize; x++)
+ {
+ rect.x = (x + 0) * video.screen_width / grid_xsize;
+ rect.w = (x + 1) * video.screen_width / grid_xsize - rect.x;
+
+ for (y = 0; y < grid_ysize; y++)
+ {
+ rect.y = (y + 0) * video.screen_height / grid_ysize;
+ rect.h = (y + 1) * video.screen_height / grid_ysize - rect.y;
+
+ if (overlay.grid_button[x][y] == overlay.grid_button_highlight)
+ SDL_SetRenderDrawColor(sdl_renderer, 255, 255, 255, alpha_highlight);
+ else
+ SDL_SetRenderDrawColor(sdl_renderer, 255, 255, 255, alpha);
+
+ if (overlay.grid_button[x][y] != CHAR_GRID_BUTTON_NONE)
+ SDL_RenderFillRect(sdl_renderer, &rect);