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      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
      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 #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       const struct pipe_vertex_element *vertex_elements,
    149       unsigned nr_vertex_elements,
    150       const struct pipe_draw_info *info);
    151 
    152 
    153 #ifdef __cplusplus
    154 }
    155 #endif
    156 
    157 #endif /* !U_DRAW_H */
    158