gallium: basic and initial implementation of the stream output interface

aka transform feedback

4 files changed, 29 insertions, 1 deletions

diff --git a/src/gallium/drivers/softpipe/SConscript b/src/gallium/drivers/softpipe/SConscript
index b80c6dea93..be5917a688 100644
--- a/src/gallium/drivers/softpipe/SConscript
+++ b/src/gallium/drivers/softpipe/SConscript
@@ -27,6 +27,7 @@ softpipe = env.ConvenienceLibrary(
 		'sp_state_fs.c',
 		'sp_state_rasterizer.c',
 		'sp_state_sampler.c',
+		'sp_state_so.c',
 		'sp_state_surface.c',
 		'sp_state_vertex.c',
 		'sp_surface.c',
diff --git a/src/gallium/drivers/softpipe/sp_context.c b/src/gallium/drivers/softpipe/sp_context.c
index 2f10b46e98..b1970140d5 100644
--- a/src/gallium/drivers/softpipe/sp_context.c
+++ b/src/gallium/drivers/softpipe/sp_context.c
@@ -251,6 +251,10 @@ softpipe_create_context( struct pipe_screen *screen,
    softpipe->pipe.bind_vertex_elements_state = softpipe_bind_vertex_elements_state;
    softpipe->pipe.delete_vertex_elements_state = softpipe_delete_vertex_elements_state;
 
+   softpipe->pipe.create_stream_output_state = softpipe_create_stream_output_state;
+   softpipe->pipe.bind_stream_output_state = softpipe_bind_stream_output_state;
+   softpipe->pipe.delete_stream_output_state = softpipe_delete_stream_output_state;
+
    softpipe->pipe.set_blend_color = softpipe_set_blend_color;
    softpipe->pipe.set_stencil_ref = softpipe_set_stencil_ref;
    softpipe->pipe.set_clip_state = softpipe_set_clip_state;
@@ -264,7 +268,7 @@ softpipe_create_context( struct pipe_screen *screen,
    softpipe->pipe.create_sampler_view = softpipe_create_sampler_view;
    softpipe->pipe.sampler_view_destroy = softpipe_sampler_view_destroy;
    softpipe->pipe.set_viewport_state = softpipe_set_viewport_state;
-
+   softpipe->pipe.set_stream_output_buffers = softpipe_set_stream_output_buffers;
    softpipe->pipe.set_vertex_buffers = softpipe_set_vertex_buffers;
 
    softpipe->pipe.draw_arrays = softpipe_draw_arrays;
diff --git a/src/gallium/drivers/softpipe/sp_context.h b/src/gallium/drivers/softpipe/sp_context.h
index b3d3fe620f..f8ffc5787d 100644
--- a/src/gallium/drivers/softpipe/sp_context.h
+++ b/src/gallium/drivers/softpipe/sp_context.h
@@ -50,6 +50,7 @@ struct softpipe_tex_tile_cache;
 struct sp_fragment_shader;
 struct sp_vertex_shader;
 struct sp_velems_state;
+struct sp_so_state;
 
 
 struct softpipe_context {
@@ -65,6 +66,7 @@ struct softpipe_context {
    struct sp_vertex_shader *vs;
    struct sp_geometry_shader *gs;
    struct sp_velems_state *velems;
+   struct sp_so_state *so;
 
    /** Other rendering state */
    struct pipe_blend_color blend_color;
diff --git a/src/gallium/drivers/softpipe/sp_state.h b/src/gallium/drivers/softpipe/sp_state.h
index 5b0faabeae..dd958ebb53 100644
--- a/src/gallium/drivers/softpipe/sp_state.h
+++ b/src/gallium/drivers/softpipe/sp_state.h
@@ -51,6 +51,8 @@
 #define SP_NEW_VS            0x2000
 #define SP_NEW_QUERY         0x4000
 #define SP_NEW_GS            0x8000
+#define SP_NEW_SO            0x10000
+#define SP_NEW_SO_BUFFERS    0x20000
 
 
 struct tgsi_sampler;
@@ -105,6 +107,10 @@ struct sp_velems_state {
    struct pipe_vertex_element velem[PIPE_MAX_ATTRIBS];
 };
 
+struct sp_so_state {
+   struct pipe_stream_output_state base;
+};
+
 
 void *
 softpipe_create_blend_state(struct pipe_context *,
@@ -263,5 +269,20 @@ softpipe_get_vertex_info(struct softpipe_context *softpipe);
 struct vertex_info *
 softpipe_get_vbuf_vertex_info(struct softpipe_context *softpipe);
 
+void *
+softpipe_create_stream_output_state(
+   struct pipe_context *pipe,
+   const struct pipe_stream_output_state *templ);
+void
+softpipe_bind_stream_output_state(struct pipe_context *pipe,
+                                  void *so);
+void
+softpipe_delete_stream_output_state(struct pipe_context *pipe, void *so);
+
+void
+softpipe_set_stream_output_buffers(struct pipe_context *pipe,
+                                   struct pipe_resource **buffers,
+                                   int *offsets,
+                                   int num_buffers);
 
 #endif