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/**************************************************************************

 *

 * Copyright 2008 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 VMWARE 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 "util/u_memory.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"

#include "translate/translate_cache.h"

#include "util/u_prim.h"

struct pt_emit {

   struct draw_context *draw;

   struct translate *translate;

   struct translate_cache *cache;

   unsigned prim;

   const struct vertex_info *vinfo;

};

void

draw_pt_emit_prepare(struct pt_emit *emit,

                     unsigned prim,

                     unsigned *max_vertices)

{

   struct draw_context *draw = emit->draw;

   const struct vertex_info *vinfo;

   unsigned dst_offset;

   struct translate_key hw_key;

   unsigned i;

   /* XXX: need to flush to get prim_vbuf.c to release its allocation??

    */

   draw_do_flush( draw, DRAW_FLUSH_BACKEND );

   /* XXX: may need to defensively reset this later on as clipping can

    * clobber this state in the render backend.

    */

   emit->prim = prim;

   draw->render->set_primitive(draw->render, emit->prim);

   /* Must do this after set_primitive() above:

    */

   emit->vinfo = 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->attrib[i].src_index * 4 * sizeof(float) );

      output_format = draw_translate_vinfo_format(vinfo->attrib[i].emit);

      emit_sz = draw_translate_vinfo_size(vinfo->attrib[i].emit);

      /* doesn't handle EMIT_OMIT */

      assert(emit_sz != 0);

      if (vinfo->attrib[i].emit == EMIT_1F_PSIZE) {

	 src_buffer = 1;

	 src_offset = 0;

      }

      hw_key.element[i].type = TRANSLATE_ELEMENT_NORMAL;

      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].instance_divisor = 0;

      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;

   if (!emit->translate ||

       translate_key_compare(&emit->translate->key, &hw_key) != 0) {

      translate_key_sanitize(&hw_key);

      emit->translate = translate_cache_find(emit->cache, &hw_key);

   }

   if (!vinfo->size)

      *max_vertices = 0;

   else

      *max_vertices = (draw->render->max_vertex_buffer_bytes /

                       (vinfo->size * 4));

}

void

draw_pt_emit(struct pt_emit *emit,

             const struct draw_vertex_info *vert_info,

             const struct draw_prim_info *prim_info)

{

   const float (*vertex_data)[4] = (const float (*)[4])vert_info->verts->data;

   unsigned vertex_count = vert_info->count;

   unsigned stride = vert_info->stride;

   const ushort *elts = prim_info->elts;

   struct draw_context *draw = emit->draw;

   struct translate *translate = emit->translate;

   struct vbuf_render *render = draw->render;

   unsigned start, i;

   void *hw_verts;

   /* XXX: need to flush to get prim_vbuf.c to release its allocation??

    */

   draw_do_flush( draw, DRAW_FLUSH_BACKEND );

   if (vertex_count == 0)

      return;

   /* XXX: and work out some way to coordinate the render primitive

    * between vbuf.c and here...

    */

   render->set_primitive(draw->render, prim_info->prim);

   render->allocate_vertices(render,

                             (ushort)translate->key.output_stride,

                             (ushort)vertex_count);

   hw_verts = render->map_vertices( render );

   if (!hw_verts) {

      debug_warn_once("map of vertex buffer failed (out of memory?)");

      return;

   }

   translate->set_buffer(translate,

			 0,

			 vertex_data,

			 stride,

			 ~0);

   translate->set_buffer(translate,

			 1,

			 &draw->rasterizer->point_size,

			 0,

			 ~0);

   /* fetch/translate vertex attribs to fill hw_verts[] */

   translate->run(translate,

		  0,

		  vertex_count,

                  draw->start_instance,

                  draw->instance_id,

		  hw_verts );

   render->unmap_vertices(render, 0, vertex_count - 1);

   for (start = i = 0;

        i < prim_info->primitive_count;

        start += prim_info->primitive_lengths[i], i++)

   {

      render->draw_elements(render,

                            elts + start,

                            prim_info->primitive_lengths[i]);

   }

   render->release_vertices(render);

}

void

draw_pt_emit_linear(struct pt_emit *emit,

                    const struct draw_vertex_info *vert_info,

                    const struct draw_prim_info *prim_info)

{

   const float (*vertex_data)[4] = (const float (*)[4])vert_info->verts->data;

   unsigned stride = vert_info->stride;

   unsigned count = vert_info->count;

   struct draw_context *draw = emit->draw;

   struct translate *translate = emit->translate;

   struct vbuf_render *render = draw->render;

   void *hw_verts;

   unsigned start, i;

#if 0

   debug_printf("Linear emit\n");

#endif

   /* XXX: need to flush to get prim_vbuf.c to release its allocation??

    */

   draw_do_flush( draw, DRAW_FLUSH_BACKEND );

   /* XXX: and work out some way to coordinate the render primitive

    * between vbuf.c and here...

    */

   render->set_primitive(draw->render, prim_info->prim);

   if (!render->allocate_vertices(render,

                                  (ushort)translate->key.output_stride,

                                  (ushort)count))

      goto fail;

   hw_verts = render->map_vertices( render );

   if (!hw_verts)

      goto fail;

   translate->set_buffer(translate, 0,

			 vertex_data, stride, count - 1);

   translate->set_buffer(translate, 1,

			 &draw->rasterizer->point_size,

			 0, ~0);

   translate->run(translate,

                  0,

                  count,

                  draw->start_instance,

                  draw->instance_id,

                  hw_verts);

   if (0) {

      unsigned i;

      for (i = 0; i < count; i++) {

         debug_printf("\n\n%s vertex %d:\n", __FUNCTION__, i);

         draw_dump_emitted_vertex( emit->vinfo,

                                   (const uint8_t *)hw_verts +

                                   translate->key.output_stride * i );

      }

   }

   render->unmap_vertices( render, 0, count - 1 );

   for (start = i = 0;

        i < prim_info->primitive_count;

        start += prim_info->primitive_lengths[i], i++)

   {

      render->draw_arrays(render,

                          start,

                          prim_info->primitive_lengths[i]);

   }

   render->release_vertices(render);

   return;

fail:

   debug_warn_once("allocate or map of vertex buffer failed (out of memory?)");

   return;

}

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;

   emit->cache = translate_cache_create();

   if (!emit->cache) {

      FREE(emit);

      return NULL;

   }

   return emit;

}

void

draw_pt_emit_destroy(struct pt_emit *emit)

{

   if (emit->cache)

      translate_cache_destroy(emit->cache);

   FREE(emit);

}