1 files changed, 73 insertions, 3 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_state_sampler.c b/src/gallium/drivers/llvmpipe/lp_state_sampler.c
index 0fea7f20a73..715ce2f02e4 100644
--- a/src/gallium/drivers/llvmpipe/lp_state_sampler.c
+++ b/src/gallium/drivers/llvmpipe/lp_state_sampler.c
@@ -35,10 +35,9 @@
 #include "draw/draw_context.h"
 
 #include "lp_context.h"
-#include "lp_context.h"
+#include "lp_screen.h"
 #include "lp_state.h"
-#include "draw/draw_context.h"
-
+#include "state_tracker/sw_winsys.h"
 
 
 static void *
@@ -222,6 +221,77 @@ llvmpipe_delete_sampler_state(struct pipe_context *pipe,
 }
 
 
+/**
+ * Called during state validation when LP_NEW_SAMPLER_VIEW is set.
+ */
+void
+llvmpipe_prepare_vertex_sampling(struct llvmpipe_context *lp,
+                                 unsigned num,
+                                 struct pipe_sampler_view **views)
+{
+   unsigned i;
+   uint32_t row_stride[DRAW_MAX_TEXTURE_LEVELS];
+   uint32_t img_stride[DRAW_MAX_TEXTURE_LEVELS];
+   const void *data[DRAW_MAX_TEXTURE_LEVELS];
+
+   assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
+   if (!num)
+      return;
+
+   for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
+      struct pipe_sampler_view *view = i < num ? views[i] : NULL;
+
+      if (view) {
+         struct pipe_resource *tex = view->texture;
+         struct llvmpipe_resource *lp_tex = llvmpipe_resource(tex);
+
+         /* We're referencing the texture's internal data, so save a
+          * reference to it.
+          */
+         pipe_resource_reference(&lp->mapped_vs_tex[i], tex);
+
+         if (!lp_tex->dt) {
+            /* regular texture - setup array of mipmap level pointers */
+            int j;
+            for (j = 0; j <= tex->last_level; j++) {
+               data[j] =
+                  llvmpipe_get_texture_image_all(lp_tex, j, LP_TEX_USAGE_READ,
+                                                 LP_TEX_LAYOUT_LINEAR);
+               row_stride[j] = lp_tex->row_stride[j];
+               img_stride[j] = lp_tex->img_stride[j];
+            }
+         }
+         else {
+            /* display target texture/surface */
+            /*
+             * XXX: Where should this be unmapped?
+             */
+            struct llvmpipe_screen *screen = llvmpipe_screen(tex->screen);
+            struct sw_winsys *winsys = screen->winsys;
+            data[0] = winsys->displaytarget_map(winsys, lp_tex->dt,
+                                                PIPE_TRANSFER_READ);
+            row_stride[0] = lp_tex->row_stride[0];
+            img_stride[0] = lp_tex->img_stride[0];
+            assert(data[0]);
+         }
+         draw_set_mapped_texture(lp->draw,
+                                 i,
+                                 tex->width0, tex->height0, tex->depth0,
+                                 tex->last_level,
+                                 row_stride, img_stride, data);
+      }
+   }
+}
+
+void
+llvmpipe_cleanup_vertex_sampling(struct llvmpipe_context *ctx)
+{
+   unsigned i;
+   for (i = 0; i < Elements(ctx->mapped_vs_tex); i++) {
+      pipe_resource_reference(&ctx->mapped_vs_tex[i], NULL);
+   }
+}
+
 void
 llvmpipe_init_sampler_funcs(struct llvmpipe_context *llvmpipe)
 {