gallium: Support RGB888/BGR888 formats

Signed-off-by: Ryan Mckeever <ryan.mckeever@collabora.com>
Reviewed-by: Eric R. Smith <eric.smith@collabora.com>
Reviewed-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34889>

src/gallium/frontends/dri/dri_helpers.c

@@ -458,9 +458,15 @@ static const struct dri2_format_mapping dri2_format_table[] = {
       { DRM_FORMAT_XRGB8888,      __DRI_IMAGE_FORMAT_XRGB8888,
         __DRI_IMAGE_COMPONENTS_RGB,       PIPE_FORMAT_BGRX8888_UNORM, 1,
         { { 0, 0, 0, __DRI_IMAGE_FORMAT_XRGB8888 } } },
+      { DRM_FORMAT_RGB888,        __DRI_IMAGE_FORMAT_RGB888,
+        __DRI_IMAGE_COMPONENTS_RGB,       PIPE_FORMAT_B8G8R8_UNORM, 1,
+        { { 0, 0, 0, __DRI_IMAGE_FORMAT_RGB888 } } },
       { DRM_FORMAT_XBGR8888,      __DRI_IMAGE_FORMAT_XBGR8888,
         __DRI_IMAGE_COMPONENTS_RGB,       PIPE_FORMAT_RGBX8888_UNORM, 1,
         { { 0, 0, 0, __DRI_IMAGE_FORMAT_XBGR8888 } } },
+      { DRM_FORMAT_BGR888,        __DRI_IMAGE_FORMAT_BGR888,
+        __DRI_IMAGE_COMPONENTS_RGB,       PIPE_FORMAT_R8G8B8_UNORM, 1,
+        { { 0, 0, 0, __DRI_IMAGE_FORMAT_BGR888 } } },
       { DRM_FORMAT_ARGB1555,      __DRI_IMAGE_FORMAT_ARGB1555,
         __DRI_IMAGE_COMPONENTS_RGBA,      PIPE_FORMAT_B5G5R5A1_UNORM, 1,
         { { 0, 0, 0, __DRI_IMAGE_FORMAT_ARGB1555 } } },

src/loader/loader_dri_helper.h

@@ -79,6 +79,8 @@ struct loader_screen_resources {
 #define __DRI_IMAGE_FORMAT_ARGB8888     PIPE_FORMAT_BGRA8888_UNORM
 #define __DRI_IMAGE_FORMAT_ABGR8888     PIPE_FORMAT_RGBA8888_UNORM
 #define __DRI_IMAGE_FORMAT_XBGR8888     PIPE_FORMAT_RGBX8888_UNORM
+#define __DRI_IMAGE_FORMAT_RGB888       PIPE_FORMAT_B8G8R8_UNORM
+#define __DRI_IMAGE_FORMAT_BGR888       PIPE_FORMAT_R8G8B8_UNORM
 #define __DRI_IMAGE_FORMAT_R8           PIPE_FORMAT_R8_UNORM
 #define __DRI_IMAGE_FORMAT_GR88         PIPE_FORMAT_RG88_UNORM
 #define __DRI_IMAGE_FORMAT_NONE         PIPE_FORMAT_NONE