Subversion Repositories Kolibri OS

Rev

Blame | Last modification | View Log | Download | RSS feed

  1. /**************************************************************************
  2.  *
  3.  * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
  4.  * All Rights Reserved.
  5.  *
  6.  * Permission is hereby granted, free of charge, to any person obtaining a
  7.  * copy of this software and associated documentation files (the
  8.  * "Software"), to deal in the Software without restriction, including
  9.  * without limitation the rights to use, copy, modify, merge, publish,
  10.  * distribute, sub license, and/or sell copies of the Software, and to
  11.  * permit persons to whom the Software is furnished to do so, subject to
  12.  * the following conditions:
  13.  *
  14.  * The above copyright notice and this permission notice (including the
  15.  * next paragraph) shall be included in all copies or substantial portions
  16.  * of the Software.
  17.  *
  18.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19.  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20.  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21.  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22.  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23.  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24.  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25.  *
  26.  **************************************************************************/
  27.  
  28.  /*
  29.   * Authors:
  30.   *   Keith Whitwell <keith@tungstengraphics.com>
  31.   */
  32.  
  33. #include "util/u_memory.h"
  34. #include "draw/draw_private.h"
  35. #include "draw/draw_pipe.h"
  36.  
  37.  
  38.  
  39. void
  40. draw_pipe_passthrough_point(struct draw_stage *stage, struct prim_header *header)
  41. {
  42.    stage->next->point(stage->next, header);
  43. }
  44.  
  45. void
  46. draw_pipe_passthrough_line(struct draw_stage *stage, struct prim_header *header)
  47. {
  48.    stage->next->line(stage->next, header);
  49. }
  50.  
  51. void
  52. draw_pipe_passthrough_tri(struct draw_stage *stage, struct prim_header *header)
  53. {
  54.    stage->next->tri(stage->next, header);
  55. }
  56.  
  57.  
  58.  
  59.  
  60.  
  61. /* This is only used for temporary verts.
  62.  */
  63. #define MAX_VERTEX_SIZE ((2 + PIPE_MAX_SHADER_OUTPUTS) * 4 * sizeof(float))
  64.  
  65.  
  66. /**
  67.  * Allocate space for temporary post-transform vertices, such as for clipping.
  68.  */
  69. boolean draw_alloc_temp_verts( struct draw_stage *stage, unsigned nr )
  70. {
  71.    assert(!stage->tmp);
  72.  
  73.    stage->tmp = NULL;
  74.    stage->nr_tmps = nr;
  75.  
  76.    if (nr != 0)
  77.    {
  78.       unsigned i;
  79.       ubyte *store = (ubyte *) MALLOC( MAX_VERTEX_SIZE * nr );
  80.  
  81.       if (store == NULL)
  82.          return FALSE;
  83.  
  84.       stage->tmp = (struct vertex_header **) MALLOC( sizeof(struct vertex_header *) * nr );
  85.       if (stage->tmp == NULL) {
  86.          FREE(store);
  87.          return FALSE;
  88.       }
  89.          
  90.       for (i = 0; i < nr; i++)
  91.          stage->tmp[i] = (struct vertex_header *)(store + i * MAX_VERTEX_SIZE);
  92.    }
  93.  
  94.    return TRUE;
  95. }
  96.  
  97.  
  98. void draw_free_temp_verts( struct draw_stage *stage )
  99. {
  100.    if (stage->tmp) {
  101.       FREE( stage->tmp[0] );
  102.       FREE( stage->tmp );
  103.       stage->tmp = NULL;
  104.    }
  105. }
  106.  
  107.  
  108. /* Reset vertex ids.  This is basically a type of flush.
  109.  *
  110.  * Called only from draw_pipe_vbuf.c
  111.  */
  112. void draw_reset_vertex_ids(struct draw_context *draw)
  113. {
  114.    struct draw_stage *stage = draw->pipeline.first;
  115.    
  116.    while (stage) {
  117.       unsigned i;
  118.  
  119.       for (i = 0; i < stage->nr_tmps; i++)
  120.          stage->tmp[i]->vertex_id = UNDEFINED_VERTEX_ID;
  121.  
  122.       stage = stage->next;
  123.    }
  124.  
  125.    if (draw->pipeline.verts)
  126.    {
  127.       unsigned i;
  128.       char *verts = draw->pipeline.verts;
  129.       unsigned stride = draw->pipeline.vertex_stride;
  130.  
  131.       for (i = 0; i < draw->pipeline.vertex_count; i++) {
  132.          ((struct vertex_header *)verts)->vertex_id = UNDEFINED_VERTEX_ID;
  133.          verts += stride;
  134.       }
  135.    }
  136. }
  137.  
  138.