compositor-x11: Allow r5g6b5 visuals for X11 backend SHM

The support is already present in the pixman renderer, so we can just
check and use it.

diff --git a/src/compositor-x11.c b/src/compositor-x11.c
index 1d1b6a4..d98e48d 100644 (file)
--- a/src/compositor-x11.c
+++ b/src/compositor-x11.c
@@ -703,6 +703,12 @@ x11_output_init_shm(struct x11_compositor *c, struct x11_output *output,
             visual_type->blue_mask == 0x0000ff) {
                weston_log("Will use x8r8g8b8 format for SHM surfaces\n");
                pixman_format = PIXMAN_x8r8g8b8;
+       } else if (bitsperpixel == 16 &&
+                  visual_type->red_mask == 0x00f800 &&
+                  visual_type->green_mask == 0x0007e0 &&
+                  visual_type->blue_mask == 0x00001f) {
+               weston_log("Will use r5g6b5 format for SHM surfaces\n");
+               pixman_format = PIXMAN_r5g6b5;
        } else {
                weston_log("Can't find appropriate format for SHM pixmap\n");
                errno = ENOTSUP;