From 01eebfe1b6de2e36dd3af0952fc8329b7073a100 Mon Sep 17 00:00:00 2001
From: Zack Rusin <zackr@vmware.com>
Date: Mon, 14 Jun 2010 10:18:09 -0400
Subject: draw: implement vertex texture sampling using llvm

---
 src/gallium/drivers/llvmpipe/lp_setup.c | 73 ++++++++++++++++++++++++++++++++-
 1 file changed, 72 insertions(+), 1 deletion(-)

(limited to 'src/gallium/drivers/llvmpipe/lp_setup.c')

diff --git a/src/gallium/drivers/llvmpipe/lp_setup.c b/src/gallium/drivers/llvmpipe/lp_setup.c
index 2597fa8f71..fcb6e06123 100644
--- a/src/gallium/drivers/llvmpipe/lp_setup.c
+++ b/src/gallium/drivers/llvmpipe/lp_setup.c
@@ -641,7 +641,6 @@ lp_setup_set_fragment_sampler_views(struct lp_setup_context *setup,
             /*
              * XXX: Where should this be unmapped?
              */
-
             struct llvmpipe_screen *screen = llvmpipe_screen(tex->screen);
             struct sw_winsys *winsys = screen->winsys;
             jit_tex->data[0] = winsys->displaytarget_map(winsys, lp_tex->dt,
@@ -657,6 +656,75 @@ lp_setup_set_fragment_sampler_views(struct lp_setup_context *setup,
 }
 
 
+/**
+ * Called during state validation when LP_NEW_SAMPLER_VIEW is set.
+ */
+void
+lp_setup_set_vertex_sampler_views(struct lp_setup_context *setup,
+                                  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];
+   struct lp_scene *scene;
+   struct llvmpipe_context *lp;
+
+   LP_DBG(DEBUG_SETUP, "%s\n", __FUNCTION__);
+
+   assert(num <= PIPE_MAX_VERTEX_SAMPLERS);
+
+   scene = lp_setup_get_current_scene(setup);
+   lp = llvmpipe_context(scene->pipe);
+
+   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(&setup->vs.current_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);
+      }
+   }
+}
+
+
+
 /**
  * Is the given texture referenced by any scene?
  * Note: we have to check all scenes including any scenes currently
@@ -850,6 +918,9 @@ lp_setup_destroy( struct lp_setup_context *setup )
 
    util_unreference_framebuffer_state(&setup->fb);
 
+   for (i = 0; i < Elements(setup->vs.current_tex); i++) {
+      pipe_resource_reference(&setup->vs.current_tex[i], NULL);
+   }
    for (i = 0; i < Elements(setup->fs.current_tex); i++) {
       pipe_resource_reference(&setup->fs.current_tex[i], NULL);
    }
-- 
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