virgl: Add tweak to apply a swizzle when drawing/blitting to a emulated BGRA texture

With Qemu this final swizzle is not needed, but with vtest it is, i.e. it depends on
how a program using virglrenderer uses the surface that is rendered to, hence
a tweak is added.

v2: Update description and fix spelling (Emil)
v3: Send tweak as binary value instead of using strings (Gurchetan)
Reviewed-by: Gurchetan Singh <[email protected]>

1 files changed, 3 insertions, 0 deletions

diff --git a/src/gallium/drivers/virgl/virgl_screen.c b/src/gallium/drivers/virgl/virgl_screen.c
index 54bde6f1237..e96a10ffbc7 100644
--- a/src/gallium/drivers/virgl/virgl_screen.c
+++ b/src/gallium/drivers/virgl/virgl_screen.c
@@ -855,6 +855,7 @@ virgl_create_screen(struct virgl_winsys *vws, const struct pipe_screen_config *c
    struct virgl_screen *screen = CALLOC_STRUCT(virgl_screen);
 
    const char *VIRGL_GLES_EMULATE_BGRA = "gles_emulate_bgra";
+   const char *VIRGL_GLES_APPLY_BGRA_DEST_SWIZZLE = "gles_apply_bgra_dest_swizzle";
    if (!screen)
       return NULL;
 
@@ -863,6 +864,8 @@ virgl_create_screen(struct virgl_winsys *vws, const struct pipe_screen_config *c
    if (config && config->options) {
       screen->tweak_gles_emulate_bgra =
             driQueryOptionb(config->options, VIRGL_GLES_EMULATE_BGRA);
+      screen->tweak_gles_apply_bgra_dest_swizzle =
+            driQueryOptionb(config->options, VIRGL_GLES_APPLY_BGRA_DEST_SWIZZLE);
    }
    screen->vws = vws;
    screen->base.get_name = virgl_get_name;