+ if (*x < 0)
+ {
+ *width += *x;
+ *x = 0;
+ }
+ else if (*x + *width > bitmap->width)
+ {
+ *width = bitmap->width - *x;
+ }
+
+ if (*y < 0)
+ {
+ *height += *y;
+ *y = 0;
+ }
+ else if (*y + *height > bitmap->height)
+ {
+ *height = bitmap->height - *y;
+ }
+
+ return TRUE;
+#endif
+}
+
+void BlitBitmap(Bitmap *src_bitmap, Bitmap *dst_bitmap,
+ int src_x, int src_y, int width, int height,
+ int dst_x, int dst_y)
+{
+ int dst_x_unclipped = dst_x;
+ int dst_y_unclipped = dst_y;
+
+ if (DrawingDeactivated(dst_x, dst_y, width, height))
+ return;
+
+#if 1
+ if (!InClippedRectangle(src_bitmap, &src_x, &src_y, &width, &height, FALSE) ||
+ !InClippedRectangle(dst_bitmap, &dst_x, &dst_y, &width, &height, TRUE))
+ return;
+
+ /* source x/y might need adjustment if destination x/y was clipped top/left */
+ src_x += dst_x - dst_x_unclipped;
+ src_y += dst_y - dst_y_unclipped;
+
+#else
+ /* skip if rectangle starts outside bitmap */
+ if (src_x >= src_bitmap->width ||
+ src_y >= src_bitmap->height ||
+ dst_x >= dst_bitmap->width ||
+ dst_y >= dst_bitmap->height)
+ return;
+
+ /* clip if rectangle overlaps bitmap */
+ if (src_x + width > src_bitmap->width)
+ width = src_bitmap->width - src_x;
+ if (src_y + height > src_bitmap->height)
+ height = src_bitmap->height - src_y;
+ if (dst_x + width > dst_bitmap->width)
+ width = dst_bitmap->width - dst_x;
+ if (dst_y + height > dst_bitmap->height)
+ height = dst_bitmap->height - dst_y;
+#endif
+
+#if 0
+ /* !!! 2009-03-30: Fixed by using self-compiled, patched SDL.dll !!! */
+ /* (This bug still exists in the actual (as of 2009-06-15) version 1.2.13,
+ but is already fixed in SVN and should therefore finally be fixed with
+ the next official SDL release, which is probably version 1.2.14.) */
+#if 1
+ /* !!! 2009-03-24: It seems that this problem still exists in 1.2.12 !!! */
+#if defined(TARGET_SDL) && defined(PLATFORM_WIN32)
+ if (src_bitmap == dst_bitmap)
+ {
+ /* !!! THIS IS A BUG (IN THE SDL LIBRARY?) AND SHOULD BE FIXED !!! */
+
+ /* needed when blitting directly to same bitmap -- should not be needed with
+ recent SDL libraries, but apparently does not work in 1.2.11 directly */
+
+ static Bitmap *tmp_bitmap = NULL;
+ static int tmp_bitmap_xsize = 0;
+ static int tmp_bitmap_ysize = 0;
+
+ /* start with largest static bitmaps for initial bitmap size ... */
+ if (tmp_bitmap_xsize == 0 && tmp_bitmap_ysize == 0)
+ {
+ tmp_bitmap_xsize = MAX(gfx.win_xsize, gfx.scrollbuffer_width);
+ tmp_bitmap_ysize = MAX(gfx.win_ysize, gfx.scrollbuffer_height);
+ }
+
+ /* ... and allow for later re-adjustments due to custom artwork bitmaps */
+ if (src_bitmap->width > tmp_bitmap_xsize ||
+ src_bitmap->height > tmp_bitmap_ysize)
+ {
+ tmp_bitmap_xsize = MAX(tmp_bitmap_xsize, src_bitmap->width);
+ tmp_bitmap_ysize = MAX(tmp_bitmap_ysize, src_bitmap->height);
+
+ FreeBitmap(tmp_bitmap);
+
+ tmp_bitmap = NULL;
+ }
+
+ if (tmp_bitmap == NULL)
+ tmp_bitmap = CreateBitmap(tmp_bitmap_xsize, tmp_bitmap_ysize,
+ DEFAULT_DEPTH);
+
+ sysCopyArea(src_bitmap, tmp_bitmap,
+ src_x, src_y, width, height, dst_x, dst_y, BLIT_OPAQUE);
+ sysCopyArea(tmp_bitmap, dst_bitmap,
+ dst_x, dst_y, width, height, dst_x, dst_y, BLIT_OPAQUE);
+
+ return;
+ }
+#endif
+#endif
+#endif
+
+#if 0
+ if (dst_x < gfx.sx + gfx.sxsize)
+ printf("::: %d: BlitBitmap(%d, %d, %d, %d)\n",
+ FrameCounter, dst_x, dst_y, width, height);
+#endif
+
+ sysCopyArea(src_bitmap, dst_bitmap,
+ src_x, src_y, width, height, dst_x, dst_y, BLIT_OPAQUE);
+}
+
+void BlitBitmapTiled(Bitmap *src_bitmap, Bitmap *dst_bitmap,
+ int src_x, int src_y, int src_width, int src_height,
+ int dst_x, int dst_y, int dst_width, int dst_height)
+{
+ int src_xsize = (src_width == 0 ? src_bitmap->width : src_width);
+ int src_ysize = (src_height == 0 ? src_bitmap->height : src_height);
+ int dst_xsize = dst_width;
+ int dst_ysize = dst_height;
+ int src_xsteps = (dst_xsize + src_xsize - 1) / src_xsize;
+ int src_ysteps = (dst_ysize + src_ysize - 1) / src_ysize;
+ int x, y;
+
+ for (y = 0; y < src_ysteps; y++)
+ {
+ for (x = 0; x < src_xsteps; x++)
+ {
+ int draw_x = dst_x + x * src_xsize;
+ int draw_y = dst_y + y * src_ysize;
+ int draw_xsize = MIN(src_xsize, dst_xsize - x * src_xsize);
+ int draw_ysize = MIN(src_ysize, dst_ysize - y * src_ysize);
+
+ BlitBitmap(src_bitmap, dst_bitmap, src_x, src_y, draw_xsize, draw_ysize,
+ draw_x, draw_y);
+ }
+ }
+}
+
+void FadeRectangle(Bitmap *bitmap_cross, int x, int y, int width, int height,
+ int fade_mode, int fade_delay, int post_delay,
+ void (*draw_border_function)(void))
+{
+#if 1
+ /* (use destination bitmap "backbuffer" -- "bitmap_cross" may be undefined) */
+ if (!InClippedRectangle(backbuffer, &x, &y, &width, &height, TRUE))
+ return;
+#endif
+
+#if defined(TARGET_SDL)
+ SDLFadeRectangle(bitmap_cross, x, y, width, height,
+ fade_mode, fade_delay, post_delay, draw_border_function);
+#else
+ X11FadeRectangle(bitmap_cross, x, y, width, height,
+ fade_mode, fade_delay, post_delay, draw_border_function);
+#endif
+}
+
+void FillRectangle(Bitmap *bitmap, int x, int y, int width, int height,
+ Pixel color)
+{
+ if (DrawingDeactivated(x, y, width, height))
+ return;
+
+#if 1
+ if (!InClippedRectangle(bitmap, &x, &y, &width, &height, TRUE))
+ return;
+#else
+ /* skip if rectangle starts outside bitmap */
+ if (x >= bitmap->width ||
+ y >= bitmap->height)
+ return;
+
+ /* clip if rectangle overlaps bitmap */
+ if (x + width > bitmap->width)
+ width = bitmap->width - x;
+ if (y + height > bitmap->height)
+ height = bitmap->height - y;
+#endif
+
+ sysFillRectangle(bitmap, x, y, width, height, color);
+}
+
+void ClearRectangle(Bitmap *bitmap, int x, int y, int width, int height)
+{
+ FillRectangle(bitmap, x, y, width, height, BLACK_PIXEL);
+}
+
+void ClearRectangleOnBackground(Bitmap *bitmap, int x, int y,
+ int width, int height)
+{
+ if (DrawingOnBackground(x, y))
+ BlitBitmap(gfx.background_bitmap, bitmap, x, y, width, height, x, y);
+ else
+ ClearRectangle(bitmap, x, y, width, height);
+}
+
+void SetClipMask(Bitmap *bitmap, GC clip_gc, Pixmap clip_pixmap)
+{
+#if defined(TARGET_X11)
+ if (clip_gc)
+ {
+ bitmap->clip_gc = clip_gc;
+ XSetClipMask(display, bitmap->clip_gc, clip_pixmap);
+ }