5 files changed, 41 insertions, 0 deletions

diff --git a/src/mesa/pipe/softpipe/Makefile b/src/mesa/pipe/softpipe/Makefile
index ffa31102d55..401df1cfb76 100644
--- a/src/mesa/pipe/softpipe/Makefile
+++ b/src/mesa/pipe/softpipe/Makefile
@@ -26,6 +26,7 @@ DRIVER_SOURCES = \
 	sp_state_blend.c \
 	sp_state_clip.c \
 	sp_state_derived.c \
+	sp_state_feedback.c \
 	sp_state_fs.c \
 	sp_state_sampler.c \
 	sp_state_setup.c \
diff --git a/src/mesa/pipe/softpipe/sp_context.c b/src/mesa/pipe/softpipe/sp_context.c
index 5404b7f7905..26453d97852 100644
--- a/src/mesa/pipe/softpipe/sp_context.c
+++ b/src/mesa/pipe/softpipe/sp_context.c
@@ -239,6 +239,7 @@ struct pipe_context *softpipe_create( struct pipe_winsys *pipe_winsys,
    softpipe->pipe.set_clear_color_state = softpipe_set_clear_color_state;
    softpipe->pipe.set_constant_buffer = softpipe_set_constant_buffer;
    softpipe->pipe.set_depth_state = softpipe_set_depth_test_state;
+   softpipe->pipe.set_feedback_state = softpipe_set_feedback_state;
    softpipe->pipe.set_framebuffer_state = softpipe_set_framebuffer_state;
    softpipe->pipe.set_fs_state = softpipe_set_fs_state;
    softpipe->pipe.set_vs_state = softpipe_set_vs_state;
@@ -249,8 +250,10 @@ struct pipe_context *softpipe_create( struct pipe_winsys *pipe_winsys,
    softpipe->pipe.set_stencil_state = softpipe_set_stencil_state;
    softpipe->pipe.set_texture_state = softpipe_set_texture_state;
    softpipe->pipe.set_viewport_state = softpipe_set_viewport_state;
+
    softpipe->pipe.set_vertex_buffer = softpipe_set_vertex_buffer;
    softpipe->pipe.set_vertex_element = softpipe_set_vertex_element;
+   softpipe->pipe.set_feedback_buffer = softpipe_set_feedback_buffer;
 
    softpipe->pipe.draw_arrays = softpipe_draw_arrays;
    softpipe->pipe.draw_elements = softpipe_draw_elements;
diff --git a/src/mesa/pipe/softpipe/sp_context.h b/src/mesa/pipe/softpipe/sp_context.h
index fd0af6f727d..2a6b932523a 100644
--- a/src/mesa/pipe/softpipe/sp_context.h
+++ b/src/mesa/pipe/softpipe/sp_context.h
@@ -78,6 +78,7 @@ struct softpipe_context {
    struct pipe_clip_state clip;
    struct pipe_constant_buffer constants[2];
    struct pipe_depth_state depth_test;
+   struct pipe_feedback_state feedback;
    struct pipe_framebuffer_state framebuffer;
    struct pipe_shader_state fs;
    struct pipe_shader_state vs;
@@ -107,6 +108,9 @@ struct softpipe_context {
    boolean need_z;  /**< produce quad/fragment Z values? */
    boolean need_w;  /**< produce quad/fragment W values? */
 
+   /** Feedback buffers */
+   struct pipe_feedback_buffer feedback_buffer[PIPE_MAX_FEEDBACK_ATTRIBS];
+
 #if 0
    /* Stipple derived state:
     */
diff --git a/src/mesa/pipe/softpipe/sp_draw_arrays.c b/src/mesa/pipe/softpipe/sp_draw_arrays.c
index 5198a493da3..7ea29a0a269 100644
--- a/src/mesa/pipe/softpipe/sp_draw_arrays.c
+++ b/src/mesa/pipe/softpipe/sp_draw_arrays.c
@@ -135,6 +135,19 @@ softpipe_draw_elements(struct pipe_context *pipe,
       draw_set_mapped_element_buffer(draw, 0, NULL);
    }
 
+   /* Map feedback buffers if enabled */
+   if (sp->feedback.enabled) {
+      const uint n = sp->feedback.interleaved ? 1 : sp->feedback.num_attribs;
+      for (i = 0; i < n; i++) {
+         void *ptr = pipe->winsys->buffer_map(pipe->winsys,
+                                              sp->feedback_buffer[i].buffer,
+                                              PIPE_BUFFER_FLAG_WRITE);
+         draw_set_mapped_feedback_buffer(draw, i, ptr,
+                                         sp->feedback_buffer[i].size);
+      }
+   }
+
+
    /* draw! */
    draw_arrays(draw, mode, start, count);
 
@@ -152,6 +165,17 @@ softpipe_draw_elements(struct pipe_context *pipe,
       draw_set_mapped_element_buffer(draw, 0, NULL);
    }
 
+   /* Unmap feedback buffers if enabled */
+   if (sp->feedback.enabled) {
+      const uint n = sp->feedback.interleaved ? 1 : sp->feedback.num_attribs;
+      for (i = 0; i < n; i++) {
+         pipe->winsys->buffer_unmap(pipe->winsys,
+                                    sp->feedback_buffer[i].buffer);
+         draw_set_mapped_feedback_buffer(draw, i, NULL, 0);
+      }
+   }
+
+
    softpipe_unmap_surfaces(sp);
    softpipe_unmap_constant_buffers(sp);
 
diff --git a/src/mesa/pipe/softpipe/sp_state.h b/src/mesa/pipe/softpipe/sp_state.h
index 354580b2a5a..f40ebe3e2b8 100644
--- a/src/mesa/pipe/softpipe/sp_state.h
+++ b/src/mesa/pipe/softpipe/sp_state.h
@@ -59,6 +59,9 @@ void softpipe_set_constant_buffer(struct pipe_context *,
 void softpipe_set_depth_test_state( struct pipe_context *,
                                     const struct pipe_depth_state * );
 
+void softpipe_set_feedback_state( struct pipe_context *,
+                                  const struct pipe_feedback_state * );
+
 void softpipe_set_fs_state( struct pipe_context *,
                             const struct pipe_shader_state * );
 
@@ -96,6 +99,12 @@ void softpipe_set_vertex_buffer(struct pipe_context *,
                                 unsigned index,
                                 const struct pipe_vertex_buffer *);
 
+void softpipe_set_feedback_buffer(struct pipe_context *,
+                                  uint index,
+                                  const struct pipe_feedback_buffer *);
+
+
+
 void softpipe_update_derived( struct softpipe_context *softpipe );