st/mesa: use private pipe_sampler_view in decompress_with_blit()

Similar to the previous commit.  Also fix incorrect setting of the
sampler view's state after it's created.  We need to specify the
first/last_level fields in the template instead.

NOTE: This is a candidate for the 8.0 branch.

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
(cherry picked from commit 0315cb9f8f3ec38fa9594860754fb53a67cf4c23)

1 files changed, 18 insertions, 4 deletions

diff --git a/src/mesa/state_tracker/st_cb_texture.c b/src/mesa/state_tracker/st_cb_texture.c
index a19120afc31..f5bf018c346 100644
--- a/src/mesa/state_tracker/st_cb_texture.c
+++ b/src/mesa/state_tracker/st_cb_texture.c
@@ -611,8 +611,7 @@ decompress_with_blit(struct gl_context * ctx,
    struct pipe_context *pipe = st->pipe;
    struct st_texture_image *stImage = st_texture_image(texImage);
    struct st_texture_object *stObj = st_texture_object(texImage->TexObject);
-   struct pipe_sampler_view *src_view =
-      st_get_texture_sampler_view(stObj, pipe);
+   struct pipe_sampler_view *src_view;
    const GLuint width = texImage->Width;
    const GLuint height = texImage->Height;
    struct pipe_surface *dst_surface;
@@ -634,8 +633,21 @@ decompress_with_blit(struct gl_context * ctx,
       pipe->render_condition(pipe, NULL, 0);
    }
 
-   /* Choose the source mipmap level */
-   src_view->u.tex.first_level = src_view->u.tex.last_level = texImage->Level;
+   /* Create sampler view that limits fetches to the source mipmap level */
+   {
+      struct pipe_sampler_view sv_temp;
+
+      u_sampler_view_default_template(&sv_temp, stObj->pt, stObj->pt->format);
+
+      sv_temp.u.tex.first_level =
+      sv_temp.u.tex.last_level = texImage->Level;
+
+      src_view = pipe->create_sampler_view(pipe, stObj->pt, &sv_temp);
+      if (!src_view) {
+         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glGetTexImage");
+         return;
+      }
+   }
 
    /* blit/render/decompress */
    util_blit_pixels_tex(st->blit,
@@ -704,6 +716,8 @@ decompress_with_blit(struct gl_context * ctx,
 
    /* destroy the temp / dest surface */
    util_destroy_rgba_surface(dst_texture, dst_surface);
+
+   pipe_sampler_view_reference(&src_view, NULL);
 }