rnd-20030404-4-src

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

diff --git a/src/libgame/sdl.c b/src/libgame/sdl.c
index 2406489587d0c74b67a7a1cd7d9d92c661d8e321..51c2baf83e8ef9e4f5f5508c3ac9b34a158f8e36 100644 (file)
--- a/src/libgame/sdl.c
+++ b/src/libgame/sdl.c
@@ -1233,6 +1233,72 @@ Bitmap *SDLLoadImage(char *filename)
 }
 
 
+/* ------------------------------------------------------------------------- */
+/* custom cursor fuctions                                                    */
+/* ------------------------------------------------------------------------- */
+
+static SDL_Cursor *create_cursor(const char **image)
+{
+  int i, row, col;
+  Uint8 data[4*32];
+  Uint8 mask[4*32];
+  int hot_x, hot_y;
+
+  i = -1;
+  for (row=0; row<32; ++row)
+  {
+    for (col=0; col<32; ++col)
+    {
+      if (col % 8)
+      {
+        data[i] <<= 1;
+        mask[i] <<= 1;
+      }
+      else
+      {
+        i++;
+        data[i] = mask[i] = 0;
+      }
+
+      switch (image[4+row][col])
+      {
+        case 'X':
+         data[i] |= 0x01;
+         mask[i] |= 0x01;
+         break;
+        case '.':
+         mask[i] |= 0x01;
+         break;
+        case ' ':
+         break;
+      }
+    }
+  }
+
+  sscanf(image[4+row], "%d,%d", &hot_x, &hot_y);
+
+  return SDL_CreateCursor(data, mask, 32, 32, hot_x, hot_y);
+}
+
+void SDLSetMouseCursor(const char **cursor_image)
+{
+  static const char **last_cursor_image = NULL;
+  static SDL_Cursor *cursor_default = NULL;
+  static SDL_Cursor *cursor_current = NULL;
+
+  if (cursor_default == NULL)
+    cursor_default = SDL_GetCursor();
+
+  if (cursor_image != NULL && cursor_image != last_cursor_image)
+  {
+    cursor_current = create_cursor(cursor_image);
+    last_cursor_image = cursor_image;
+  }
+
+  SDL_SetCursor(cursor_image ? cursor_current : cursor_default);
+}
+
+
 /* ========================================================================= */
 /* audio functions                                                           */
 /* ========================================================================= */