gallium: fix some render to texture bugs

Before, we were sometimes rendering into a stale texture because
st_finalize_texture() would discard the old texture and create a new one.

Moved st_update_framebuffer atom after texture validation so that we
can create a new renderbuffer surface if the texture changes.

Also, split texture validation into two parts: finalize_textures and
update_textures.  Do finalize_textures first to avoid getting into the
situtation where we're doing a pipe->surface_copy() mid-way through
state validation.

Some debug code still in place, but disabled...

1 files changed, 1 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_cb_texture.c b/src/mesa/state_tracker/st_cb_texture.c
index 3206215b2e..3468b5f2a1 100644
--- a/src/mesa/state_tracker/st_cb_texture.c
+++ b/src/mesa/state_tracker/st_cb_texture.c
@@ -1496,6 +1496,7 @@ st_finalize_texture(GLcontext *ctx,
           stObj->pt->cpp != cpp ||
           stObj->pt->compressed != firstImage->base.IsCompressed) {
          pipe_texture_release(&stObj->pt);
+         ctx->st->dirty.st |= ST_NEW_FRAMEBUFFER;
       }
    }