+/* Map format of render buffer to corresponding format for the linear_buffer
+ * used for sharing with the display gpu of a Prime setup (== is_different_gpu).
+ * Usually linear_format == format, except for depth >= 30 formats, where
+ * different gpu vendors have different preferences wrt. color channel ordering.
+ */
+static uint32_t
+dri3_linear_format_for_format(struct loader_dri3_drawable *draw, uint32_t format)
+{
+ switch (format) {
+ case __DRI_IMAGE_FORMAT_XRGB2101010:
+ case __DRI_IMAGE_FORMAT_XBGR2101010:
+ /* Different preferred formats for different hw */
+ if (dri3_get_red_mask_for_depth(draw, 30) == 0x3ff)
+ return __DRI_IMAGE_FORMAT_XBGR2101010;
+ else
+ return __DRI_IMAGE_FORMAT_XRGB2101010;
+
+ case __DRI_IMAGE_FORMAT_ARGB2101010:
+ case __DRI_IMAGE_FORMAT_ABGR2101010:
+ /* Different preferred formats for different hw */
+ if (dri3_get_red_mask_for_depth(draw, 30) == 0x3ff)
+ return __DRI_IMAGE_FORMAT_ABGR2101010;
+ else
+ return __DRI_IMAGE_FORMAT_ARGB2101010;
+
+ default:
+ return format;
+ }
+}
+
+/* the DRIimage createImage function takes __DRI_IMAGE_FORMAT codes, while
+ * the createImageFromFds call takes DRM_FORMAT codes. To avoid
+ * complete confusion, just deal in __DRI_IMAGE_FORMAT codes for now and
+ * translate to DRM_FORMAT codes in the call to createImageFromFds
+ */
+static int
+image_format_to_fourcc(int format)
+{
+
+ /* Convert from __DRI_IMAGE_FORMAT to DRM_FORMAT (sigh) */
+ switch (format) {
+ case __DRI_IMAGE_FORMAT_SARGB8: return __DRI_IMAGE_FOURCC_SARGB8888;
+ case __DRI_IMAGE_FORMAT_SABGR8: return __DRI_IMAGE_FOURCC_SABGR8888;
+ case __DRI_IMAGE_FORMAT_RGB565: return DRM_FORMAT_RGB565;
+ case __DRI_IMAGE_FORMAT_XRGB8888: return DRM_FORMAT_XRGB8888;
+ case __DRI_IMAGE_FORMAT_ARGB8888: return DRM_FORMAT_ARGB8888;
+ case __DRI_IMAGE_FORMAT_ABGR8888: return DRM_FORMAT_ABGR8888;
+ case __DRI_IMAGE_FORMAT_XBGR8888: return DRM_FORMAT_XBGR8888;
+ case __DRI_IMAGE_FORMAT_XRGB2101010: return DRM_FORMAT_XRGB2101010;
+ case __DRI_IMAGE_FORMAT_ARGB2101010: return DRM_FORMAT_ARGB2101010;
+ case __DRI_IMAGE_FORMAT_XBGR2101010: return DRM_FORMAT_XBGR2101010;
+ case __DRI_IMAGE_FORMAT_ABGR2101010: return DRM_FORMAT_ABGR2101010;
+ case __DRI_IMAGE_FORMAT_XBGR16161616F: return DRM_FORMAT_XBGR16161616F;
+ case __DRI_IMAGE_FORMAT_ABGR16161616F: return DRM_FORMAT_ABGR16161616F;
+ }
+ return 0;
+}
+
+#ifdef HAVE_DRI3_MODIFIERS
+static bool
+has_supported_modifier(struct loader_dri3_drawable *draw, unsigned int format,
+ uint64_t *modifiers, uint32_t count)
+{
+ uint64_t *supported_modifiers;
+ int32_t supported_modifiers_count;
+ bool found = false;
+ int i, j;
+
+ if (!draw->ext->image->queryDmaBufModifiers(draw->dri_screen,
+ format, 0, NULL, NULL,
+ &supported_modifiers_count) ||
+ supported_modifiers_count == 0)
+ return false;
+
+ supported_modifiers = malloc(supported_modifiers_count * sizeof(uint64_t));
+ if (!supported_modifiers)
+ return false;
+
+ draw->ext->image->queryDmaBufModifiers(draw->dri_screen, format,
+ supported_modifiers_count,
+ supported_modifiers, NULL,
+ &supported_modifiers_count);
+
+ for (i = 0; !found && i < supported_modifiers_count; i++) {
+ for (j = 0; !found && j < count; j++) {
+ if (supported_modifiers[i] == modifiers[j])
+ found = true;
+ }
+ }
+
+ free(supported_modifiers);
+ return found;
+}
+#endif
+