added empty borders between different virtual buttons

[rocksndiamonds.git] / src / libgame / sdl.c

diff --git a/src/libgame/sdl.c b/src/libgame/sdl.c
index 07064a4bf65dbdaac7b3ecec8f8d7770a57fe97d..0fd3aa62eb6a319d7523357ce0419e4b2d0f455f 100644 (file)
--- a/src/libgame/sdl.c
+++ b/src/libgame/sdl.c
@@ -2984,11 +2984,124 @@ boolean SDLReadJoystick(int nr, int *x, int *y, boolean *b1, boolean *b2)
 /* ========================================================================= */
 
 #if defined(USE_TOUCH_INPUT_OVERLAY)
+static void DrawTouchInputOverlay_ShowGrid(int alpha)
+{
+  SDL_Rect rect;
+  int grid_xsize = overlay.grid_xsize;
+  int grid_ysize = overlay.grid_ysize;
+  int x, y;
+
+  SDL_SetRenderDrawColor(sdl_renderer, 255, 255, 255, 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] == 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++)
+  {
+    for (y = 0; y < grid_ysize; y++)
+    {
+      rect.x = (x + 0) * video.screen_width  / grid_xsize;
+      rect.y = (y + 0) * video.screen_height / grid_ysize;
+      rect.w = (x + 1) * video.screen_width  / grid_xsize - rect.x;
+      rect.h = (y + 1) * video.screen_height / grid_ysize - rect.y;
+
+      if (x == 0 ||
+         overlay.grid_button[x - 1][y] != overlay.grid_button[x][y])
+      {
+       rect.x += 2;
+       rect.w -= 2;
+      }
+
+      if (x == grid_xsize - 1 ||
+         overlay.grid_button[x + 1][y] != overlay.grid_button[x][y])
+      {
+       rect.w -= 2;
+      }
+
+      if (y == 0 ||
+         overlay.grid_button[x][y - 1] != overlay.grid_button[x][y])
+      {
+       rect.y += 2;
+       rect.h -= 2;
+      }
+
+      if (y == grid_ysize - 1 ||
+         overlay.grid_button[x][y + 1] != overlay.grid_button[x][y])
+      {
+       rect.h -= 2;
+      }
+
+      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);
+    }
+  }
+
+  SDL_SetRenderDrawColor(sdl_renderer, 0, 0, 0, 255);
+}
+
 static void DrawTouchInputOverlay()
 {
   static SDL_Texture *texture = NULL;
   static boolean initialized = FALSE;
   static boolean deactivated = TRUE;
+  static boolean show_grid = FALSE;
   static int width = 0, height = 0;
   static int alpha_max = SDL_ALPHA_OPAQUE / 2;
   static int alpha_step = 5;
@@ -3014,6 +3127,21 @@ static void DrawTouchInputOverlay()
       deactivated = TRUE;
   }
 
+  if (overlay.show_grid)
+    show_grid = TRUE;
+  else if (deactivated)
+    show_grid = FALSE;
+
+  if (show_grid)
+    DrawTouchInputOverlay_ShowGrid(alpha);
+
+  DrawTouchInputOverlay_ShowGridButtons(alpha);
+
+  return;
+
+
+  // !!! VIRTUAL BUTTONS FROM IMAGE FILE NOT USED ANYMORE !!!
+
   if (!initialized)
   {
     char *basename = "overlay/VirtualButtons.png";