src/gallium/auxiliary/util/u_draw.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2008 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
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  12  * the following conditions:
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  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
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #ifndef U_DRAW_H
  29 #define U_DRAW_H
  30
  31
  32 #include "pipe/p_compiler.h"
  33 #include "pipe/p_context.h"
  34 #include "pipe/p_state.h"
  35
  36
  37 #ifdef __cplusplus
  38 extern "C" {
  39 #endif
  40
  41
  42 static INLINE void
  43 util_draw_init_info(struct pipe_draw_info *info)
  44 {
  45    memset(info, 0, sizeof(*info));
  46    info->instance_count = 1;
  47    info->max_index = 0xffffffff;
  48 }
  49
  50
  51 static INLINE void
  52 util_draw_arrays(struct pipe_context *pipe, uint mode, uint start, uint count)
  53 {
  54    struct pipe_draw_info info;
  55
  56    util_draw_init_info(&info);
  57    info.mode = mode;
  58    info.start = start;
  59    info.count = count;
  60    info.min_index = start;
  61    info.max_index = start + count - 1;
  62
  63    pipe->draw_vbo(pipe, &info);
  64 }
  65
  66 static INLINE void
  67 util_draw_elements(struct pipe_context *pipe, int index_bias,
  68                    uint mode, uint start, uint count)
  69 {
  70    struct pipe_draw_info info;
  71
  72    util_draw_init_info(&info);
  73    info.indexed = TRUE;
  74    info.mode = mode;
  75    info.start = start;
  76    info.count = count;
  77    info.index_bias = index_bias;
  78
  79    pipe->draw_vbo(pipe, &info);
  80 }
  81
  82 static INLINE void
  83 util_draw_arrays_instanced(struct pipe_context *pipe,
  84                            uint mode, uint start, uint count,
  85                            uint start_instance,
  86                            uint instance_count)
  87 {
  88    struct pipe_draw_info info;
  89
  90    util_draw_init_info(&info);
  91    info.mode = mode;
  92    info.start = start;
  93    info.count = count;
  94    info.start_instance = start_instance;
  95    info.instance_count = instance_count;
  96    info.min_index = start;
  97    info.max_index = start + count - 1;
  98
  99    pipe->draw_vbo(pipe, &info);
 100 }
 101
 102 static INLINE void
 103 util_draw_elements_instanced(struct pipe_context *pipe,
 104                              int index_bias,
 105                              uint mode, uint start, uint count,
 106                              uint start_instance,
 107                              uint instance_count)
 108 {
 109    struct pipe_draw_info info;
 110
 111    util_draw_init_info(&info);
 112    info.indexed = TRUE;
 113    info.mode = mode;
 114    info.start = start;
 115    info.count = count;
 116    info.index_bias = index_bias;
 117    info.start_instance = start_instance;
 118    info.instance_count = instance_count;
 119
 120    pipe->draw_vbo(pipe, &info);
 121 }
 122
 123 static INLINE void
 124 util_draw_range_elements(struct pipe_context *pipe,
 125                          int index_bias,
 126                          uint min_index,
 127                          uint max_index,
 128                          uint mode, uint start, uint count)
 129 {
 130    struct pipe_draw_info info;
 131
 132    util_draw_init_info(&info);
 133    info.indexed = TRUE;
 134    info.mode = mode;
 135    info.start = start;
 136    info.count = count;
 137    info.index_bias = index_bias;
 138    info.min_index = min_index;
 139    info.max_index = max_index;
 140
 141    pipe->draw_vbo(pipe, &info);
 142 }
 143
 144
 145 unsigned
 146 util_draw_max_index(
 147       const struct pipe_vertex_buffer *vertex_buffers,
 148       unsigned nr_vertex_buffers,
 149       const struct pipe_vertex_element *vertex_elements,
 150       unsigned nr_vertex_elements,
 151       const struct pipe_draw_info *info);
 152
 153
 154 #ifdef __cplusplus
 155 }
 156 #endif
 157
 158 #endif /* !U_DRAW_H */