+static unsigned
+picture_format_fixups(struct exa_pixmap_priv *pSrc, PicturePtr pSrcPicture, boolean mask,
+ PicturePtr pDstPicture)
+{
+ boolean set_alpha = FALSE;
+ boolean swizzle = FALSE;
+ unsigned ret = 0;
+
+ if (pSrc->picture_format == pSrcPicture->format) {
+ if (pSrc->picture_format == PICT_a8) {
+ if (mask)
+ return FS_MASK_LUMINANCE;
+ else if (pDstPicture->format != PICT_a8) {
+ /* if both dst and src are luminance then
+ * we don't want to swizzle the alpha (X) of the
+ * source into W component of the dst because
+ * it will break our destination */
+ return FS_SRC_LUMINANCE;
+ }
+ }
+ return 0;
+ }
+
+ if (pSrc->picture_format != PICT_a8r8g8b8) {
+ assert(!"can not handle formats");
+ return 0;
+ }
+
+ /* pSrc->picture_format == PICT_a8r8g8b8 */
+ switch (pSrcPicture->format) {
+ case PICT_x8b8g8r8:
+ case PICT_b8g8r8:
+ set_alpha = TRUE; /* fall trough */
+ case PICT_a8b8g8r8:
+ swizzle = TRUE;
+ break;
+ case PICT_x8r8g8b8:
+ case PICT_r8g8b8:
+ set_alpha = TRUE; /* fall through */
+ case PICT_a8r8g8b8:
+ break;
+#ifdef PICT_TYPE_BGRA
+ case PICT_b8g8r8a8:
+ case PICT_b8g8r8x8:
+ case PICT_a2r10g10b10:
+ case PICT_x2r10g10b10:
+ case PICT_a2b10g10r10:
+ case PICT_x2b10g10r10:
+#endif
+ default:
+ assert(!"can not handle formats");
+ return 0;
+ }
+
+ if (set_alpha)
+ ret |= mask ? FS_MASK_SET_ALPHA : FS_SRC_SET_ALPHA;
+ if (swizzle)
+ ret |= mask ? FS_MASK_SWIZZLE_RGB : FS_SRC_SWIZZLE_RGB;
+
+ return ret;
+}