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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2011 Marek Olšák <maraeo@gmail.com>
  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 AUTHORS 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. #ifndef U_VBUF_H
  29. #define U_VBUF_H
  30.  
  31. /* This module takes care of user buffer uploads and vertex format fallbacks.
  32.  * It's designed for the drivers which don't want to use the Draw module.
  33.  * There is a more detailed description at the beginning of the .c file.
  34.  */
  35.  
  36. #include "pipe/p_context.h"
  37. #include "pipe/p_state.h"
  38. #include "pipe/p_format.h"
  39.  
  40. struct cso_context;
  41. struct u_vbuf;
  42.  
  43. /* Hardware vertex fetcher limitations can be described by this structure. */
  44. struct u_vbuf_caps {
  45.    enum pipe_format format_translation[PIPE_FORMAT_COUNT];
  46.  
  47.    /* Whether vertex fetches don't have to be 4-byte-aligned. */
  48.    /* TRUE if hardware supports it. */
  49.    unsigned buffer_offset_unaligned:1;
  50.    unsigned buffer_stride_unaligned:1;
  51.    unsigned velem_src_offset_unaligned:1;
  52.  
  53.    /* Whether the driver supports user vertex buffers. */
  54.    unsigned user_vertex_buffers:1;
  55. };
  56.  
  57.  
  58. boolean u_vbuf_get_caps(struct pipe_screen *screen, struct u_vbuf_caps *caps);
  59.  
  60. struct u_vbuf *
  61. u_vbuf_create(struct pipe_context *pipe,
  62.               struct u_vbuf_caps *caps, unsigned aux_vertex_buffer_index);
  63.  
  64. void u_vbuf_destroy(struct u_vbuf *mgr);
  65.  
  66. /* State and draw functions. */
  67. void u_vbuf_set_vertex_elements(struct u_vbuf *mgr, unsigned count,
  68.                                 const struct pipe_vertex_element *states);
  69. void u_vbuf_set_vertex_buffers(struct u_vbuf *mgr,
  70.                                unsigned start_slot, unsigned count,
  71.                                const struct pipe_vertex_buffer *bufs);
  72. void u_vbuf_set_index_buffer(struct u_vbuf *mgr,
  73.                              const struct pipe_index_buffer *ib);
  74. void u_vbuf_draw_vbo(struct u_vbuf *mgr, const struct pipe_draw_info *info);
  75.  
  76. /* Save/restore functionality. */
  77. void u_vbuf_save_vertex_elements(struct u_vbuf *mgr);
  78. void u_vbuf_restore_vertex_elements(struct u_vbuf *mgr);
  79. void u_vbuf_save_aux_vertex_buffer_slot(struct u_vbuf *mgr);
  80. void u_vbuf_restore_aux_vertex_buffer_slot(struct u_vbuf *mgr);
  81.  
  82. #endif
  83.