src/gallium/drivers/r300/r300_texture.c

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  22
  23 #include "r300_texture.h"
  24
  25 static int minify(int i)
  26 {
  27     return MAX2(1, i >> 1);
  28 }
  29
  30 static void r300_setup_miptree(struct r300_texture* tex)
  31 {
  32     struct pipe_texture* base = &tex->tex;
  33     int stride, size, offset;
  34     int i;
  35
  36     for (i = 0; i <= base->last_level; i++) {
  37         if (i > 0) {
  38             base->width[i] = minify(base->width[i-1]);
  39             base->height[i] = minify(base->height[i-1]);
  40             base->depth[i] = minify(base->depth[i-1]);
  41         }
  42
  43         base->nblocksx[i] = pf_get_nblocksx(&base->block, base->width[i]);
  44         base->nblocksy[i] = pf_get_nblocksy(&base->block, base->width[i]);
  45
  46         /* Radeons enjoy things in multiples of 32. */
  47         /* XXX NPOT -> 64, not 32 */
  48         stride = (base->nblocksx[i] * base->block.size + 63) & ~63;
  49         size = stride * base->nblocksy[i] * base->depth[i];
  50
  51         /* XXX 64 for NPOT */
  52         tex->offset[i] = (tex->size + 63) & ~63;
  53         tex->size = tex->offset[i] + size;
  54     }
  55 }
  56
  57 /* Create a new texture. */
  58 static struct pipe_texture*
  59     r300_texture_create(struct pipe_screen* screen,
  60                         const struct pipe_texture* template)
  61 {
  62     /* XXX struct r300_screen* r300screen = r300_screen(screen); */
  63
  64     struct r300_texture* tex = CALLOC_STRUCT(r300_texture);
  65
  66     if (!tex) {
  67         return NULL;
  68     }
  69
  70     tex->tex = *template;
  71     tex->tex.refcount = 1;
  72     tex->tex.screen = screen;
  73
  74     r300_setup_miptree(tex);
  75
  76     tex->buffer = screen->buffer_create(screen, 64,
  77                                         PIPE_BUFFER_USAGE_PIXEL,
  78                                         tex->size);
  79
  80     if (!tex->buffer) {
  81         FREE(tex);
  82         return NULL;
  83     }
  84
  85     return (struct pipe_texture*)tex;
  86 }
  87
  88 static void r300_texture_release(struct pipe_screen* screen,
  89                                  struct pipe_texture** texture)
  90 {
  91     if (!*texture) {
  92         return;
  93     }
  94
  95     (*texture)->refcount--;
  96
  97     if ((*texture)->refcount <= 0) {
  98         struct r300_texture* tex = (struct r300_texture*)*texture;
  99
 100         pipe_buffer_reference(screen, &tex->buffer, NULL);
 101
 102         FREE(tex);
 103     }
 104
 105     *texture = NULL;
 106 }
 107
 108 static struct pipe_surface* r300_get_tex_surface(struct pipe_screen* screen,
 109                                                  struct pipe_texture* texture,
 110                                                  unsigned face,
 111                                                  unsigned level,
 112                                                  unsigned zslice,
 113                                                  unsigned flags)
 114 {
 115     struct r300_texture* tex = (struct r300_texture*)texture;
 116     struct pipe_surface* surface = CALLOC_STRUCT(pipe_surface);
 117     unsigned offset;
 118
 119     /* XXX this is certainly dependent on tex target */
 120     offset = tex->offset[level];
 121
 122     if (surface) {
 123         surface->refcount = 1;
 124         pipe_texture_reference(&surface->texture, texture);
 125         surface->format = texture->format;
 126         surface->width = texture->width[level];
 127         surface->height = texture->height[level];
 128         surface->offset = offset;
 129         surface->usage = flags;
 130         surface->status = PIPE_SURFACE_STATUS_DEFINED;
 131     }
 132
 133     return surface;
 134 }
 135
 136 static void r300_tex_surface_release(struct pipe_screen* screen,
 137                                      struct pipe_surface** surface)
 138 {
 139     struct pipe_surface* s = *surface;
 140
 141     s->refcount--;
 142
 143     if (s->refcount <= 0) {
 144         pipe_texture_reference(&s->texture, NULL);
 145         FREE(s);
 146     }
 147
 148     *surface = NULL;
 149 }
 150
 151 static struct pipe_texture*
 152     r300_texture_blanket(struct pipe_screen* screen,
 153                          const struct pipe_texture* base,
 154                          const unsigned* stride,
 155                          struct pipe_buffer* buffer)
 156 {
 157     struct r300_texture* tex;
 158
 159     if (base->target != PIPE_TEXTURE_2D ||
 160         base->last_level != 0 ||
 161         base->depth[0] != 1) {
 162         return NULL;
 163     }
 164
 165     tex = CALLOC_STRUCT(r300_texture);
 166     if (!tex) {
 167         return NULL;
 168     }
 169
 170     tex->tex = *base;
 171     tex->tex.refcount = 1;
 172     tex->tex.screen = screen;
 173
 174     tex->stride = *stride;
 175
 176     pipe_buffer_reference(screen, &tex->buffer, buffer);
 177
 178     return (struct pipe_texture*)tex;
 179 }
 180
 181 void r300_init_screen_texture_functions(struct pipe_screen* screen)
 182 {
 183     screen->texture_create = r300_texture_create;
 184     screen->texture_release = r300_texture_release;
 185     screen->get_tex_surface = r300_get_tex_surface;
 186     screen->tex_surface_release = r300_tex_surface_release;
 187     screen->texture_blanket = r300_texture_blanket;
 188 }