gallium: a lot more complete implementation of stream output

interface wise we have everything needed by d3d10 and gl transform feedback.
the draw module misses implementation of some corner cases (e.g. when stream
output wants different number of components per output than normal rendering
paths)

1 files changed, 106 insertions, 0 deletions

diff --git a/src/gallium/drivers/softpipe/sp_state_so.c b/src/gallium/drivers/softpipe/sp_state_so.c
new file mode 100644
index 0000000000..49bde22e97
--- /dev/null
+++ b/src/gallium/drivers/softpipe/sp_state_so.c
@@ -0,0 +1,106 @@
+/**************************************************************************
+ *
+ * Copyright 2010 VMware, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#include "sp_context.h"
+#include "sp_state.h"
+#include "sp_texture.h"
+
+#include "util/u_format.h"
+#include "util/u_memory.h"
+#include "draw/draw_context.h"
+
+
+void *
+softpipe_create_stream_output_state(struct pipe_context *pipe,
+                                    const struct pipe_stream_output_state *templ)
+{
+   struct sp_so_state *so;
+   so = (struct sp_so_state *) CALLOC_STRUCT(sp_so_state);
+
+   if (so) {
+      so->base.num_outputs = templ->num_outputs;
+      so->base.stride = templ->stride;
+      memcpy(so->base.output_buffer,
+             templ->output_buffer,
+             sizeof(int) * templ->num_outputs);
+      memcpy(so->base.register_index,
+             templ->register_index,
+             sizeof(int) * templ->num_outputs);
+      memcpy(so->base.register_mask,
+             templ->register_mask,
+             sizeof(ubyte) * templ->num_outputs);
+   }
+   return so;
+}
+
+void
+softpipe_bind_stream_output_state(struct pipe_context *pipe,
+                                  void *so)
+{
+   struct softpipe_context *softpipe = softpipe_context(pipe);
+   struct sp_so_state *sp_so = (struct sp_so_state *) so;
+
+   softpipe->so = sp_so;
+
+   softpipe->dirty |= SP_NEW_SO;
+
+   if (sp_so)
+      draw_set_so_state(softpipe->draw, &sp_so->base);
+}
+
+void
+softpipe_delete_stream_output_state(struct pipe_context *pipe, void *so)
+{
+   FREE( so );
+}
+
+void
+softpipe_set_stream_output_buffers(struct pipe_context *pipe,
+                                   struct pipe_resource **buffers,
+                                   int *offsets,
+                                   int num_buffers)
+{
+   struct softpipe_context *softpipe = softpipe_context(pipe);
+   int i;
+   void *map_buffers[PIPE_MAX_SO_BUFFERS];
+
+   assert(num_buffers <= PIPE_MAX_SO_BUFFERS);
+
+   softpipe->dirty |= SP_NEW_SO_BUFFERS;
+
+   for (i = 0; i < num_buffers; ++i) {
+      void *mapped = softpipe_resource(buffers[i])->data;
+      if (offsets[i] >= 0)
+         map_buffers[i] = ((char*)mapped) + offsets[i];
+      else {
+         /* this is a buffer append */
+         assert(!"appending not implemented");
+         map_buffers[i] = mapped;
+      }
+   }
+   draw_set_mapped_so_buffers(softpipe->draw, map_buffers, num_buffers);
+}