llvmpipe: Port vertex sampler support from softpipe.

Just enough boilerplate code to avoid segfaulting.

src/gallium/drivers/llvmpipe/lp_context.c

@@ -118,6 +118,11 @@ static void llvmpipe_destroy( struct pipe_context *pipe )
       pipe_texture_reference(&llvmpipe->texture[i], NULL);
    }
 
+   for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
+      lp_destroy_tex_tile_cache(llvmpipe->vertex_tex_cache[i]);
+      pipe_texture_reference(&llvmpipe->vertex_textures[i], NULL);
+   }
+
    for (i = 0; i < Elements(llvmpipe->constants); i++) {
       if (llvmpipe->constants[i].buffer) {
          pipe_buffer_reference(&llvmpipe->constants[i].buffer, NULL);
@@ -145,6 +150,11 @@ llvmpipe_is_texture_referenced( struct pipe_context *pipe,
          llvmpipe->framebuffer.zsbuf->texture == texture)
          return PIPE_REFERENCED_FOR_WRITE;
    }
+   for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
+      if (llvmpipe->vertex_tex_cache[i] &&
+          llvmpipe->vertex_tex_cache[i]->texture == texture)
+         return PIPE_REFERENCED_FOR_READ;
+   }
    
    return PIPE_UNREFERENCED;
 }
@@ -181,6 +191,7 @@ llvmpipe_create( struct pipe_screen *screen )
 
    llvmpipe->pipe.create_sampler_state = llvmpipe_create_sampler_state;
    llvmpipe->pipe.bind_fragment_sampler_states  = llvmpipe_bind_sampler_states;
+   llvmpipe->pipe.bind_vertex_sampler_states  = llvmpipe_bind_vertex_sampler_states;
    llvmpipe->pipe.delete_sampler_state = llvmpipe_delete_sampler_state;
 
    llvmpipe->pipe.create_depth_stencil_alpha_state = llvmpipe_create_depth_stencil_state;
@@ -206,6 +217,7 @@ llvmpipe_create( struct pipe_screen *screen )
    llvmpipe->pipe.set_polygon_stipple = llvmpipe_set_polygon_stipple;
    llvmpipe->pipe.set_scissor_state = llvmpipe_set_scissor_state;
    llvmpipe->pipe.set_fragment_sampler_textures = llvmpipe_set_sampler_textures;
+   llvmpipe->pipe.set_vertex_sampler_textures = llvmpipe_set_vertex_sampler_textures;
    llvmpipe->pipe.set_viewport_state = llvmpipe_set_viewport_state;
 
    llvmpipe->pipe.set_vertex_buffers = llvmpipe_set_vertex_buffers;
@@ -234,13 +246,15 @@ llvmpipe_create( struct pipe_screen *screen )
 
    for (i = 0; i < PIPE_MAX_SAMPLERS; i++)
       llvmpipe->tex_cache[i] = lp_create_tex_tile_cache( screen );
+   for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++)
+      llvmpipe->vertex_tex_cache[i] = lp_create_tex_tile_cache(screen);
 
 
    /* vertex shader samplers */
-   for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
+   for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
       llvmpipe->tgsi.vert_samplers[i].base.get_samples = lp_get_samples;
       llvmpipe->tgsi.vert_samplers[i].processor = TGSI_PROCESSOR_VERTEX;
-      llvmpipe->tgsi.vert_samplers[i].cache = llvmpipe->tex_cache[i];
+      llvmpipe->tgsi.vert_samplers[i].cache = llvmpipe->vertex_tex_cache[i];
       llvmpipe->tgsi.vert_samplers_list[i] = &llvmpipe->tgsi.vert_samplers[i];
    }
 
@@ -260,7 +274,7 @@ llvmpipe_create( struct pipe_screen *screen )
       goto fail;
 
    draw_texture_samplers(llvmpipe->draw,
-                         PIPE_MAX_SAMPLERS,
+                         PIPE_MAX_VERTEX_SAMPLERS,
                          (struct tgsi_sampler **)
                             llvmpipe->tgsi.vert_samplers_list);
 

src/gallium/drivers/llvmpipe/lp_context.h

@@ -55,6 +55,7 @@ struct llvmpipe_context {
    /** Constant state objects */
    const struct pipe_blend_state *blend;
    const struct pipe_sampler_state *sampler[PIPE_MAX_SAMPLERS];
+   struct pipe_sampler_state *vertex_samplers[PIPE_MAX_VERTEX_SAMPLERS];
    const struct pipe_depth_stencil_alpha_state *depth_stencil;
    const struct pipe_rasterizer_state *rasterizer;
    struct lp_fragment_shader *fs;
@@ -68,12 +69,15 @@ struct llvmpipe_context {
    struct pipe_poly_stipple poly_stipple;
    struct pipe_scissor_state scissor;
    struct pipe_texture *texture[PIPE_MAX_SAMPLERS];
+   struct pipe_texture *vertex_textures[PIPE_MAX_VERTEX_SAMPLERS];
    struct pipe_viewport_state viewport;
    struct pipe_vertex_buffer vertex_buffer[PIPE_MAX_ATTRIBS];
    struct pipe_vertex_element vertex_element[PIPE_MAX_ATTRIBS];
 
    unsigned num_samplers;
    unsigned num_textures;
+   unsigned num_vertex_samplers;
+   unsigned num_vertex_textures;
    unsigned num_vertex_elements;
    unsigned num_vertex_buffers;
 
@@ -136,6 +140,7 @@ struct llvmpipe_context {
 
    unsigned tex_timestamp;
    struct llvmpipe_tex_tile_cache *tex_cache[PIPE_MAX_SAMPLERS];
+   struct llvmpipe_tex_tile_cache *vertex_tex_cache[PIPE_MAX_VERTEX_SAMPLERS];
 
    unsigned no_rast : 1;
 

src/gallium/drivers/llvmpipe/lp_screen.c

@@ -59,7 +59,9 @@ llvmpipe_get_param(struct pipe_screen *screen, int param)
    case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
       return PIPE_MAX_SAMPLERS;
    case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
-      return 0;
+      return PIPE_MAX_VERTEX_SAMPLERS;
+   case PIPE_CAP_MAX_COMBINED_SAMPLERS:
+      return PIPE_MAX_SAMPLERS + PIPE_MAX_VERTEX_SAMPLERS;
    case PIPE_CAP_NPOT_TEXTURES:
       return 1;
    case PIPE_CAP_TWO_SIDED_STENCIL:

src/gallium/drivers/llvmpipe/lp_state.h

@@ -126,6 +126,10 @@ void *
 llvmpipe_create_sampler_state(struct pipe_context *,
                               const struct pipe_sampler_state *);
 void llvmpipe_bind_sampler_states(struct pipe_context *, unsigned, void **);
+void
+llvmpipe_bind_vertex_sampler_states(struct pipe_context *,
+                                    unsigned num_samplers,
+                                    void **samplers);
 void llvmpipe_delete_sampler_state(struct pipe_context *, void *);
 
 void *
@@ -172,6 +176,11 @@ void llvmpipe_set_sampler_textures( struct pipe_context *,
                                     unsigned num,
                                     struct pipe_texture ** );
 
+void
+llvmpipe_set_vertex_sampler_textures(struct pipe_context *,
+                                     unsigned num_textures,
+                                     struct pipe_texture **);
+
 void llvmpipe_set_viewport_state( struct pipe_context *,
                                   const struct pipe_viewport_state * );
 

src/gallium/drivers/llvmpipe/lp_state_derived.c

@@ -198,10 +198,14 @@ update_tgsi_samplers( struct llvmpipe_context *llvmpipe )
    unsigned i;
 
    /* vertex shader samplers */
-   for (i = 0; i < PIPE_MAX_SAMPLERS; i++) {
+   for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
-      llvmpipe->tgsi.vert_samplers[i].sampler = llvmpipe->sampler[i];
+      llvmpipe->tgsi.vert_samplers[i].sampler = llvmpipe->vertex_samplers[i];
-      llvmpipe->tgsi.vert_samplers[i].texture = llvmpipe->texture[i];
+      llvmpipe->tgsi.vert_samplers[i].texture = llvmpipe->vertex_textures[i];
-      llvmpipe->tgsi.frag_samplers[i].base.get_samples = lp_get_samples;
+      llvmpipe->tgsi.vert_samplers[i].base.get_samples = lp_get_samples;
+   }
+
+   for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
+      lp_tex_tile_cache_validate_texture( llvmpipe->vertex_tex_cache[i] );
    }
 
    /* fragment shader samplers */

src/gallium/drivers/llvmpipe/lp_state_sampler.c

@@ -77,6 +77,34 @@ llvmpipe_bind_sampler_states(struct pipe_context *pipe,
 }
 
 
+void
+llvmpipe_bind_vertex_sampler_states(struct pipe_context *pipe,
+                                    unsigned num_samplers,
+                                    void **samplers)
+{
+   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
+   unsigned i;
+
+   assert(num_samplers <= PIPE_MAX_VERTEX_SAMPLERS);
+
+   /* Check for no-op */
+   if (num_samplers == llvmpipe->num_vertex_samplers &&
+       !memcmp(llvmpipe->vertex_samplers, samplers, num_samplers * sizeof(void *)))
+      return;
+
+   draw_flush(llvmpipe->draw);
+
+   for (i = 0; i < num_samplers; ++i)
+      llvmpipe->vertex_samplers[i] = samplers[i];
+   for (i = num_samplers; i < PIPE_MAX_VERTEX_SAMPLERS; ++i)
+      llvmpipe->vertex_samplers[i] = NULL;
+
+   llvmpipe->num_vertex_samplers = num_samplers;
+
+   llvmpipe->dirty |= LP_NEW_SAMPLER;
+}
+
+
 void
 llvmpipe_set_sampler_textures(struct pipe_context *pipe,
                               unsigned num, struct pipe_texture **texture)
@@ -116,6 +144,37 @@ llvmpipe_set_sampler_textures(struct pipe_context *pipe,
 }
 
 
+void
+llvmpipe_set_vertex_sampler_textures(struct pipe_context *pipe,
+                                     unsigned num_textures,
+                                     struct pipe_texture **textures)
+{
+   struct llvmpipe_context *llvmpipe = llvmpipe_context(pipe);
+   uint i;
+
+   assert(num_textures <= PIPE_MAX_VERTEX_SAMPLERS);
+
+   /* Check for no-op */
+   if (num_textures == llvmpipe->num_vertex_textures &&
+       !memcmp(llvmpipe->vertex_textures, textures, num_textures * sizeof(struct pipe_texture *))) {
+      return;
+   }
+
+   draw_flush(llvmpipe->draw);
+
+   for (i = 0; i < PIPE_MAX_VERTEX_SAMPLERS; i++) {
+      struct pipe_texture *tex = i < num_textures ? textures[i] : NULL;
+
+      pipe_texture_reference(&llvmpipe->vertex_textures[i], tex);
+      lp_tex_tile_cache_set_texture(llvmpipe->vertex_tex_cache[i], tex);
+   }
+
+   llvmpipe->num_vertex_textures = num_textures;
+
+   llvmpipe->dirty |= LP_NEW_TEXTURE;
+}
+
+
 void
 llvmpipe_delete_sampler_state(struct pipe_context *pipe,
                               void *sampler)