xref: /external/mesa3d/src/gallium/auxiliary/draw/draw_pt_emit.c

/**************************************************************************
 *
 * Copyright 2008 Tungsten Graphics, Inc., Cedar Park, Texas.
 * 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 "pipe/p_util.h"
#include "draw/draw_context.h"
#include "draw/draw_private.h"
#include "draw/draw_vbuf.h"
#include "draw/draw_vertex.h"
#include "draw/draw_pt.h"
#include "translate/translate.h"


struct pt_emit {
   struct draw_context *draw;

   struct translate *translate;
};


void draw_pt_emit_prepare( struct pt_emit *emit,
			   unsigned prim )
{
   struct draw_context *draw = emit->draw;
   const struct vertex_info *vinfo;
   unsigned dst_offset;
   struct translate_key hw_key;
   unsigned i;
   boolean ok;

   ok = draw->render->set_primitive(draw->render, prim);
   if (!ok) {
      assert(0);
      return;
   }

   /* Must do this after set_primitive() above:
    */
   vinfo = draw->render->get_vertex_info(draw->render);


   /* Translate from pipeline vertices to hw vertices.
    */
   dst_offset = 0;
   for (i = 0; i < vinfo->num_attribs; i++) {
      unsigned emit_sz = 0;
      unsigned src_buffer = 0;
      unsigned output_format;
      unsigned src_offset = (vinfo->src_index[i] * 4 * sizeof(float) );



      switch (vinfo->emit[i]) {
      case EMIT_4F:
	 output_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
	 emit_sz = 4 * sizeof(float);
	 break;
      case EMIT_3F:
	 output_format = PIPE_FORMAT_R32G32B32_FLOAT;
	 emit_sz = 3 * sizeof(float);
	 break;
      case EMIT_2F:
	 output_format = PIPE_FORMAT_R32G32_FLOAT;
	 emit_sz = 2 * sizeof(float);
	 break;
      case EMIT_1F:
	 output_format = PIPE_FORMAT_R32_FLOAT;
	 emit_sz = 1 * sizeof(float);
	 break;
      case EMIT_1F_PSIZE:
	 output_format = PIPE_FORMAT_R32_FLOAT;
	 emit_sz = 1 * sizeof(float);
	 src_buffer = 1;
	 src_offset = 0;
	 break;
      case EMIT_4UB:
	 output_format = PIPE_FORMAT_B8G8R8A8_UNORM;
	 emit_sz = 4 * sizeof(ubyte);
      default:
	 assert(0);
	 output_format = PIPE_FORMAT_NONE;
	 emit_sz = 0;
	 break;
      }

      hw_key.element[i].input_format = PIPE_FORMAT_R32G32B32A32_FLOAT;
      hw_key.element[i].input_buffer = src_buffer;
      hw_key.element[i].input_offset = src_offset;
      hw_key.element[i].output_format = output_format;
      hw_key.element[i].output_offset = dst_offset;

      dst_offset += emit_sz;
   }

   hw_key.nr_elements = vinfo->num_attribs;
   hw_key.output_stride = vinfo->size * 4;

   /* Don't bother with caching at this stage:
    */
   if (!emit->translate ||
       memcmp(&emit->translate->key, &hw_key, sizeof(hw_key)) != 0)
   {
      if (emit->translate)
	 emit->translate->release(emit->translate);

      emit->translate = translate_create( &hw_key );
   }
}


void draw_pt_emit( struct pt_emit *emit,
		   const float (*vertex_data)[4],
		   unsigned vertex_count,
		   unsigned stride,
		   const ushort *elts,
		   unsigned count )
{
   struct draw_context *draw = emit->draw;
   struct translate *translate = emit->translate;
   struct vbuf_render *render = draw->render;
   void *hw_verts;

   /* XXX: need to flush to get prim_vbuf.c to release its allocation??
    */
   draw_do_flush( draw, DRAW_FLUSH_BACKEND );

   hw_verts = render->allocate_vertices(render,
					(ushort)translate->key.output_stride,
					(ushort)count);
   if (!hw_verts) {
      assert(0);
      return;
   }

   translate->set_buffer(translate,
			 0,
			 vertex_data,
			 stride );

   translate->set_buffer(translate,
			 1,
			 &draw->rasterizer->point_size,
			 0);

   translate->run( translate,
		   0,
		   vertex_count,
		   hw_verts );

   render->draw(render,
		elts,
		count);

   render->release_vertices(render,
			    hw_verts,
			    translate->key.output_stride,
			    vertex_count);
}


struct pt_emit *draw_pt_emit_create( struct draw_context *draw )
{
   struct pt_emit *emit = CALLOC_STRUCT(pt_emit);
   if (!emit)
      return NULL;

   emit->draw = draw;

   return emit;
}

void draw_pt_emit_destroy( struct pt_emit *emit )
{
   if (emit->translate)
      emit->translate->release( emit->translate );

   FREE(emit);
}