From 6d28bf917fb1d741d90fd3f05c22769376021fca Mon Sep 17 00:00:00 2001
From: Chia-I Wu <olv@lunarg.com>
Date: Fri, 16 Jul 2010 04:35:58 +0800
Subject: gallium: Implement draw_vbo and set_index_buffer for all drivers.

Some drivers define a generic function that is called by all drawing
functions.  To implement draw_vbo for such drivers, either draw_vbo
calls the generic function or the prototype of the generic function is
changed to match draw_vbo.

Other drivers have no such generic function.  draw_vbo is implemented by
calling either draw_arrays and draw_elements.

For most drivers, set_index_buffer does not mark the state dirty for
tracking.  Instead, the index buffer state is emitted whenever draw_vbo
is called, just like the case with draw_elements.  It surely can be
improved.
---
 src/gallium/drivers/galahad/glhd_context.c | 47 ++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

(limited to 'src/gallium/drivers/galahad')

diff --git a/src/gallium/drivers/galahad/glhd_context.c b/src/gallium/drivers/galahad/glhd_context.c
index ab6f17b3ab..6473f2d499 100644
--- a/src/gallium/drivers/galahad/glhd_context.c
+++ b/src/gallium/drivers/galahad/glhd_context.c
@@ -112,6 +112,16 @@ galahad_draw_range_elements(struct pipe_context *_pipe,
                              count);
 }
 
+static void
+galahad_draw_vbo(struct pipe_context *_pipe,
+                 const struct pipe_draw_info *info)
+{
+   struct galahad_context *glhd_pipe = galahad_context(_pipe);
+   struct pipe_context *pipe = glhd_pipe->pipe;
+
+   pipe->draw_vbo(pipe, info);
+}
+
 static struct pipe_query *
 galahad_create_query(struct pipe_context *_pipe,
                       unsigned query_type)
@@ -650,6 +660,41 @@ galahad_set_vertex_buffers(struct pipe_context *_pipe,
                             num_buffers,
                             buffers);
 }
+
+static void
+galahad_set_index_buffer(struct pipe_context *_pipe,
+                         const struct pipe_index_buffer *_ib)
+{
+   struct galahad_context *glhd_pipe = galahad_context(_pipe);
+   struct pipe_context *pipe = glhd_pipe->pipe;
+   struct pipe_index_buffer unwrapped_ib, *ib = NULL;
+
+   if (_ib->buffer) {
+      switch (_ib->index_size) {
+      case 1:
+      case 2:
+      case 4:
+         break;
+      default:
+         glhd_warn("index buffer %p has unrecognized index size %d",
+               _ib->buffer, _ib->index_size);
+         break;
+      }
+   }
+   else if (_ib->offset || _ib->index_size) {
+      glhd_warn("non-indexed state with index offset %d and index size %d",
+            _ib->offset, _ib->index_size);
+   }
+
+   if (_ib) {
+      unwrapped_ib = *_ib;
+      unwrapped_ib.buffer = galahad_resource_unwrap(_ib->buffer);
+      ib = &unwrapped_ib;
+   }
+
+   pipe->set_index_buffer(pipe, ib);
+}
+
 static void
 galahad_resource_copy_region(struct pipe_context *_pipe,
                               struct pipe_resource *_dst,
@@ -937,6 +982,7 @@ galahad_context_create(struct pipe_screen *_screen, struct pipe_context *pipe)
    glhd_pipe->base.draw_arrays = galahad_draw_arrays;
    glhd_pipe->base.draw_elements = galahad_draw_elements;
    glhd_pipe->base.draw_range_elements = galahad_draw_range_elements;
+   glhd_pipe->base.draw_vbo = galahad_draw_vbo;
    glhd_pipe->base.create_query = galahad_create_query;
    glhd_pipe->base.destroy_query = galahad_destroy_query;
    glhd_pipe->base.begin_query = galahad_begin_query;
@@ -976,6 +1022,7 @@ galahad_context_create(struct pipe_screen *_screen, struct pipe_context *pipe)
    glhd_pipe->base.set_fragment_sampler_views = galahad_set_fragment_sampler_views;
    glhd_pipe->base.set_vertex_sampler_views = galahad_set_vertex_sampler_views;
    glhd_pipe->base.set_vertex_buffers = galahad_set_vertex_buffers;
+   glhd_pipe->base.set_index_buffer = galahad_set_index_buffer;
    glhd_pipe->base.resource_copy_region = galahad_resource_copy_region;
    glhd_pipe->base.clear = galahad_clear;
    glhd_pipe->base.clear_render_target = galahad_clear_render_target;
-- 
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