gallium: Permit surface_copy and surface_fill to be NULL.

Uf. Lots of files touched. Would people with working vega, xorg, dri1, etc.
please make sure you are not broken, and fix yourself up if you are.

There were only two or three places where the code did not have painful
fallbacks, so I would advise st maintainers to find less painful workarounds,
or consider overhauling util_surface_copy and util_surface_fill.

Per ymanton, darktama, and Dr_Jakob's suggestions, clear has been left as-is.

I will not add PIPE_CAP_BLITTER unless it is deemed necessary.

2 files changed, 23 insertions, 8 deletions

diff --git a/src/gallium/state_trackers/xorg/xorg_exa.c b/src/gallium/state_trackers/xorg/xorg_exa.c
index af76d6690f5..4988af48641 100644
--- a/src/gallium/state_trackers/xorg/xorg_exa.c
+++ b/src/gallium/state_trackers/xorg/xorg_exa.c
@@ -693,9 +693,15 @@ ExaModifyPixmapHeader(PixmapPtr pPixmap, int width, int height,
 	    dst_surf = exa->scrn->get_tex_surface(
 		exa->scrn, texture, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_WRITE);
 	    src_surf = xorg_gpu_surface(exa->pipe->screen, priv);
-	    exa->pipe->surface_copy(exa->pipe, dst_surf, 0, 0, src_surf,
-				    0, 0, min(width, texture->width[0]),
-				    min(height, texture->height[0]));
+        if (exa->pipe->surface_copy) {
+            exa->pipe->surface_copy(exa->pipe, dst_surf, 0, 0, src_surf,
+                        0, 0, min(width, texture->width[0]),
+                        min(height, texture->height[0]));
+        } else {
+            util_surface_copy(exa->pipe, FALSE, dst_surf, 0, 0, src_surf,
+                        0, 0, min(width, texture->width[0]),
+                        min(height, texture->height[0]));
+        }
 	    exa->scrn->tex_surface_destroy(dst_surf);
 	    exa->scrn->tex_surface_destroy(src_surf);
 	}
diff --git a/src/gallium/state_trackers/xorg/xorg_renderer.c b/src/gallium/state_trackers/xorg/xorg_renderer.c
index 81b209cb596..ca69e1e0e92 100644
--- a/src/gallium/state_trackers/xorg/xorg_renderer.c
+++ b/src/gallium/state_trackers/xorg/xorg_renderer.c
@@ -7,6 +7,7 @@
 #include "util/u_draw_quad.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
+#include "util/u_rect.h"
 
 #include "pipe/p_inlines.h"
 
@@ -586,11 +587,19 @@ create_sampler_texture(struct xorg_renderer *r,
          screen, src, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_READ);
       struct pipe_surface *ps_tex = screen->get_tex_surface(
          screen, pt, 0, 0, 0, PIPE_BUFFER_USAGE_GPU_WRITE );
-      pipe->surface_copy(pipe,
-			 ps_tex, /* dest */
-			 0, 0, /* destx/y */
-			 ps_read,
-			 0, 0, src->width[0], src->height[0]);
+      if (pipe->surface_copy) {
+         pipe->surface_copy(pipe,
+                ps_tex, /* dest */
+                0, 0, /* destx/y */
+                ps_read,
+                0, 0, src->width[0], src->height[0]);
+      } else {
+          util_surface_copy(pipe, FALSE,
+                ps_tex, /* dest */
+                0, 0, /* destx/y */
+                ps_read,
+                0, 0, src->width[0], src->height[0]);
+      }
       pipe_surface_reference(&ps_read, NULL);
       pipe_surface_reference(&ps_tex, NULL);
    }