src/mesa/drivers/dri/nouveau/nouveau_array.c

   1 /*
   2  * Copyright (C) 2009-2010 Francisco Jerez.
   3  * All Rights Reserved.
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining
   6  * a copy of this software and associated documentation files (the
   7  * "Software"), to deal in the Software without restriction, including
   8  * without limitation the rights to use, copy, modify, merge, publish,
   9  * distribute, sublicense, and/or sell copies of the Software, and to
  10  * permit persons to whom the Software is furnished to do so, subject to
  11  * the following conditions:
  12  *
  13  * The above copyright notice and this permission notice (including the
  14  * next paragraph) shall be included in all copies or substantial
  15  * portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  18  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  20  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  21  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  22  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  23  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  24  *
  25  */
  26
  27 #include "main/bufferobj.h"
  28 #include "nouveau_driver.h"
  29 #include "nouveau_array.h"
  30 #include "nouveau_bufferobj.h"
  31
  32 static void
  33 get_array_extract(struct nouveau_array *a, extract_u_t *extract_u,
  34                   extract_f_t *extract_f)
  35 {
  36 #define EXTRACT(in_t, out_t, k)                                         \
  37         ({                                                              \
  38                 auto out_t f(struct nouveau_array *, int, int);         \
  39                 out_t f(struct nouveau_array *a, int i, int j) {        \
  40                         in_t x = ((in_t *)(a->buf + i * a->stride))[j]; \
  41                                                                         \
  42                         return (out_t)x / (k);                          \
  43                 };                                                      \
  44                 f;                                                      \
  45         });
  46
  47         switch (a->type) {
  48         case GL_BYTE:
  49                 *extract_u = EXTRACT(char, unsigned, 1);
  50                 *extract_f = EXTRACT(char, float, SCHAR_MAX);
  51                 break;
  52         case GL_UNSIGNED_BYTE:
  53                 *extract_u = EXTRACT(unsigned char, unsigned, 1);
  54                 *extract_f = EXTRACT(unsigned char, float, UCHAR_MAX);
  55                 break;
  56         case GL_SHORT:
  57                 *extract_u = EXTRACT(short, unsigned, 1);
  58                 *extract_f = EXTRACT(short, float, SHRT_MAX);
  59                 break;
  60         case GL_UNSIGNED_SHORT:
  61                 *extract_u = EXTRACT(unsigned short, unsigned, 1);
  62                 *extract_f = EXTRACT(unsigned short, float, USHRT_MAX);
  63                 break;
  64         case GL_INT:
  65                 *extract_u = EXTRACT(int, unsigned, 1);
  66                 *extract_f = EXTRACT(int, float, INT_MAX);
  67                 break;
  68         case GL_UNSIGNED_INT:
  69                 *extract_u = EXTRACT(unsigned int, unsigned, 1);
  70                 *extract_f = EXTRACT(unsigned int, float, UINT_MAX);
  71                 break;
  72         case GL_FLOAT:
  73                 *extract_u = EXTRACT(float, unsigned, 1.0 / UINT_MAX);
  74                 *extract_f = EXTRACT(float, float, 1);
  75                 break;
  76         default:
  77                 assert(0);
  78         }
  79 }
  80
  81 void
  82 nouveau_init_array(struct nouveau_array *a, int attr, int stride,
  83                    int fields, int type, struct gl_buffer_object *obj,
  84                    const void *ptr, GLboolean map)
  85 {
  86         a->attr = attr;
  87         a->stride = stride;
  88         a->fields = fields;
  89         a->type = type;
  90         a->buf = NULL;
  91
  92         if (obj) {
  93                 if (nouveau_bufferobj_hw(obj)) {
  94                         struct nouveau_bufferobj *nbo =
  95                                 to_nouveau_bufferobj(obj);
  96
  97                         nouveau_bo_ref(nbo->bo, &a->bo);
  98                         a->offset = (intptr_t)ptr;
  99
 100                         if (map) {
 101                                 nouveau_bo_map(a->bo, NOUVEAU_BO_RD);
 102                                 a->buf = a->bo->map + a->offset;
 103                         }
 104
 105                 } else {
 106                         nouveau_bo_ref(NULL, &a->bo);
 107                         a->offset = 0;
 108
 109                         if (map)
 110                                 a->buf = ADD_POINTERS(
 111                                         nouveau_bufferobj_sys(obj), ptr);
 112                 }
 113         }
 114
 115         if (a->buf)
 116                 get_array_extract(a, &a->extract_u, &a->extract_f);
 117 }
 118
 119 void
 120 nouveau_deinit_array(struct nouveau_array *a)
 121 {
 122         if (a->bo) {
 123                 if (a->bo->map)
 124                         nouveau_bo_unmap(a->bo);
 125         }
 126
 127         a->buf = NULL;
 128         a->fields = 0;
 129 }
 130
 131 void
 132 nouveau_cleanup_array(struct nouveau_array *a)
 133 {
 134         nouveau_deinit_array(a);
 135         nouveau_bo_ref(NULL, &a->bo);
 136 }