draw: clear the draw buffers in draw
[mesa.git] / src / gallium / drivers / llvmpipe / lp_draw_arrays.c
index 0aa13a1fc679d282e7606a42007d36855a7cf005..11b665af8ef307c6fd9a740987f1b066208a5488 100644 (file)
 
 #include "pipe/p_defines.h"
 #include "pipe/p_context.h"
-#include "pipe/internal/p_winsys_screen.h"
-#include "pipe/p_inlines.h"
 #include "util/u_prim.h"
 
-#include "lp_buffer.h"
 #include "lp_context.h"
 #include "lp_state.h"
+#include "lp_query.h"
 
 #include "draw/draw_context.h"
 
 
 
-boolean
-llvmpipe_draw_arrays(struct pipe_context *pipe, unsigned mode,
-                     unsigned start, unsigned count)
-{
-   return llvmpipe_draw_elements(pipe, NULL, 0, mode, start, count);
-}
-
-
 /**
- * Draw vertex arrays, with optional indexing.
+ * Draw vertex arrays, with optional indexing, optional instancing.
+ * All the other drawing functions are implemented in terms of this function.
  * Basically, map the vertex buffers (and drawing surfaces), then hand off
  * the drawing to the 'draw' module.
  */
-boolean
-llvmpipe_draw_range_elements(struct pipe_context *pipe,
-                             struct pipe_buffer *indexBuffer,
-                             unsigned indexSize,
-                             unsigned min_index,
-                             unsigned max_index,
-                             unsigned mode, unsigned start, unsigned count)
+static void
+llvmpipe_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
 {
    struct llvmpipe_context *lp = llvmpipe_context(pipe);
    struct draw_context *draw = lp->draw;
+   const void *mapped_indices = NULL;
    unsigned i;
 
-   lp->reduced_api_prim = u_reduced_prim(mode);
+   if (!llvmpipe_check_render_cond(lp))
+      return;
 
    if (lp->dirty)
       llvmpipe_update_derived( lp );
 
-   llvmpipe_map_transfers(lp);
-
    /*
     * Map vertex buffers
     */
    for (i = 0; i < lp->num_vertex_buffers; i++) {
-      void *buf = llvmpipe_buffer(lp->vertex_buffer[i].buffer)->data;
-      draw_set_mapped_vertex_buffer(draw, i, buf);
+      const void *buf = lp->vertex_buffer[i].user_buffer;
+      size_t size = ~0;
+      if (!buf) {
+         if (!lp->vertex_buffer[i].buffer) {
+            continue;
+         }
+         buf = llvmpipe_resource_data(lp->vertex_buffer[i].buffer);
+         size = lp->vertex_buffer[i].buffer->width0;
+      }
+      draw_set_mapped_vertex_buffer(draw, i, buf, size);
    }
 
    /* Map index buffer, if present */
-   if (indexBuffer) {
-      void *mapped_indexes = llvmpipe_buffer(indexBuffer)->data;
-      draw_set_mapped_element_buffer_range(draw, indexSize,
-                                           min_index,
-                                           max_index,
-                                           mapped_indexes);
+   if (info->indexed) {
+      unsigned available_space = ~0;
+      mapped_indices = lp->index_buffer.user_buffer;
+      if (!mapped_indices) {
+         mapped_indices = llvmpipe_resource_data(lp->index_buffer.buffer);
+         if (lp->index_buffer.buffer->width0 > lp->index_buffer.offset)
+            available_space =
+               (lp->index_buffer.buffer->width0 - lp->index_buffer.offset);
+         else
+            available_space = 0;
+      }
+      draw_set_indexes(draw,
+                       (ubyte *) mapped_indices + lp->index_buffer.offset,
+                       lp->index_buffer.index_size, available_space);
    }
-   else {
-      /* no index/element buffer */
-      draw_set_mapped_element_buffer_range(draw, 0, start,
-                                           start + count - 1, NULL);
+
+   for (i = 0; i < lp->num_so_targets; i++) {
+      void *buf = 0;
+      if (lp->so_targets[i]) {
+         buf = llvmpipe_resource(lp->so_targets[i]->target.buffer)->data;
+         lp->so_targets[i]->mapping = buf;
+      }
+   }
+   draw_set_mapped_so_targets(draw, lp->num_so_targets,
+                              lp->so_targets, lp->so_append_bitmask);
+
+   llvmpipe_prepare_vertex_sampling(lp,
+                                    lp->num_sampler_views[PIPE_SHADER_VERTEX],
+                                    lp->sampler_views[PIPE_SHADER_VERTEX]);
+   llvmpipe_prepare_geometry_sampling(lp,
+                                      lp->num_sampler_views[PIPE_SHADER_GEOMETRY],
+                                      lp->sampler_views[PIPE_SHADER_GEOMETRY]);
+   if (lp->gs && !lp->gs->shader.tokens) {
+      /* we have an empty geometry shader with stream output, so
+         attach the stream output info to the current vertex shader */
+      if (lp->vs) {
+         draw_vs_attach_so(lp->vs->draw_data, &lp->gs->shader.stream_output);
+      }
    }
+   draw_collect_pipeline_statistics(draw,
+                                    lp->active_statistics_queries > 0);
 
    /* draw! */
-   draw_arrays(draw, mode, start, count);
+   draw_vbo(draw, info);
 
    /*
-    * unmap vertex/index buffers - will cause draw module to flush
+    * unmap vertex/index buffers
     */
    for (i = 0; i < lp->num_vertex_buffers; i++) {
-      draw_set_mapped_vertex_buffer(draw, i, NULL);
+      draw_set_mapped_vertex_buffer(draw, i, NULL, 0);
    }
-   if (indexBuffer) {
-      draw_set_mapped_element_buffer(draw, 0, NULL);
+   if (mapped_indices) {
+      draw_set_indexes(draw, NULL, 0, 0);
+   }
+   draw_set_mapped_so_targets(draw, 0, NULL, 0);
+
+   if (lp->gs && !lp->gs->shader.tokens) {
+      /* we have attached stream output to the vs for rendering,
+         now lets reset it */
+      if (lp->vs) {
+         draw_vs_reset_so(lp->vs->draw_data);
+      }
    }
-
-
-   /* Note: leave drawing surfaces mapped */
-
-   lp->dirty_render_cache = TRUE;
    
-   return TRUE;
-}
-
+   llvmpipe_cleanup_vertex_sampling(lp);
+   llvmpipe_cleanup_geometry_sampling(lp);
 
-boolean
-llvmpipe_draw_elements(struct pipe_context *pipe,
-                       struct pipe_buffer *indexBuffer,
-                       unsigned indexSize,
-                       unsigned mode, unsigned start, unsigned count)
-{
-   return llvmpipe_draw_range_elements( pipe, indexBuffer,
-                                        indexSize,
-                                        0, 0xffffffff,
-                                        mode, start, count );
+   /*
+    * TODO: Flush only when a user vertex/index buffer is present
+    * (or even better, modify draw module to do this
+    * internally when this condition is seen?)
+    */
+   draw_flush(draw);
 }
 
 
 void
-llvmpipe_set_edgeflags(struct pipe_context *pipe, const unsigned *edgeflags)
+llvmpipe_init_draw_funcs(struct llvmpipe_context *llvmpipe)
 {
-   struct llvmpipe_context *lp = llvmpipe_context(pipe);
-   draw_set_edgeflags(lp->draw, edgeflags);
+   llvmpipe->pipe.draw_vbo = llvmpipe_draw_vbo;
 }