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 /* XXX maths need to go to util */
  26
  27 static int minify(int i)
  28 {
  29     return MAX2(1, i >> 1);
  30 }
  31
  32 static void r300_setup_texture_state(struct r300_texture* tex,
  33                                      unsigned width,
  34                                      unsigned height,
  35                                      unsigned pitch,
  36                                      unsigned levels)
  37 {
  38     struct r300_texture_state* state = &tex->state;
  39
  40     state->format0 = R300_TX_WIDTH((width - 1) & 0x7ff) |
  41         R300_TX_HEIGHT((height - 1) & 0x7ff) |
  42         R300_TX_NUM_LEVELS(levels) |
  43         R300_TX_PITCH_EN;
  44
  45     /* XXX */
  46     state->format1 = r300_translate_texformat(tex->tex.format);
  47
  48     state->format2 = pitch - 1;
  49
  50     /* Assume (somewhat foolishly) that oversized textures will
  51      * not be permitted by the state tracker. */
  52     if (width > 2048) {
  53         state->format2 |= R500_TXWIDTH_BIT11;
  54     }
  55     if (height > 2048) {
  56         state->format2 |= R500_TXHEIGHT_BIT11;
  57     }
  58 }
  59
  60 static void r300_setup_miptree(struct r300_texture* tex)
  61 {
  62     struct pipe_texture* base = &tex->tex;
  63     int stride, size, offset;
  64     int i;
  65
  66     for (i = 0; i <= base->last_level; i++) {
  67         if (i > 0) {
  68             base->width[i] = minify(base->width[i-1]);
  69             base->height[i] = minify(base->height[i-1]);
  70             base->depth[i] = minify(base->depth[i-1]);
  71         }
  72
  73         base->nblocksx[i] = pf_get_nblocksx(&base->block, base->width[i]);
  74         base->nblocksy[i] = pf_get_nblocksy(&base->block, base->width[i]);
  75
  76         /* Radeons enjoy things in multiples of 64.
  77          *
  78          * XXX
  79          * POT, uncompressed, unmippmapped textures can be aligned to 32,
  80          * instead of 64. */
  81         stride = align(base->nblocksx[i] * base->block.size, 64);
  82         size = stride * base->nblocksy[i] * base->depth[i];
  83
  84         tex->offset[i] = align(tex->size, 64);
  85         tex->size = tex->offset[i] + size;
  86
  87         /* Save stride of first level to the texture. */
  88         if (i == 0) {
  89             tex->stride = stride;
  90         }
  91     }
  92 }
  93
  94 /* Create a new texture. */
  95 static struct pipe_texture*
  96     r300_texture_create(struct pipe_screen* screen,
  97                         const struct pipe_texture* template)
  98 {
  99     struct r300_texture* tex = CALLOC_STRUCT(r300_texture);
 100
 101     if (!tex) {
 102         return NULL;
 103     }
 104
 105     tex->tex = *template;
 106     pipe_reference_init(&tex->tex.reference, 1);
 107     tex->tex.screen = screen;
 108
 109     r300_setup_miptree(tex);
 110
 111     r300_setup_texture_state(tex, template->width[0], template->height[0],
 112             template->width[0], template->last_level);
 113
 114     tex->buffer = screen->buffer_create(screen, 64,
 115                                         PIPE_BUFFER_USAGE_PIXEL,
 116                                         tex->size);
 117
 118     if (!tex->buffer) {
 119         FREE(tex);
 120         return NULL;
 121     }
 122
 123     return (struct pipe_texture*)tex;
 124 }
 125
 126 static void r300_texture_destroy(struct pipe_texture* texture)
 127 {
 128     struct r300_texture* tex = (struct r300_texture*)texture;
 129
 130     pipe_buffer_reference(&tex->buffer, NULL);
 131
 132     FREE(tex);
 133 }
 134
 135 static struct pipe_surface* r300_get_tex_surface(struct pipe_screen* screen,
 136                                                  struct pipe_texture* texture,
 137                                                  unsigned face,
 138                                                  unsigned level,
 139                                                  unsigned zslice,
 140                                                  unsigned flags)
 141 {
 142     struct r300_texture* tex = (struct r300_texture*)texture;
 143     struct pipe_surface* surface = CALLOC_STRUCT(pipe_surface);
 144     unsigned offset;
 145
 146     /* XXX this is certainly dependent on tex target */
 147     offset = tex->offset[level];
 148
 149     if (surface) {
 150         pipe_reference_init(&surface->reference, 1);
 151         pipe_texture_reference(&surface->texture, texture);
 152         surface->format = texture->format;
 153         surface->width = texture->width[level];
 154         surface->height = texture->height[level];
 155         surface->offset = offset;
 156         surface->usage = flags;
 157     }
 158
 159     return surface;
 160 }
 161
 162 static void r300_tex_surface_destroy(struct pipe_surface* s)
 163 {
 164     pipe_texture_reference(&s->texture, NULL);
 165     FREE(s);
 166 }
 167
 168 static struct pipe_texture*
 169     r300_texture_blanket(struct pipe_screen* screen,
 170                          const struct pipe_texture* base,
 171                          const unsigned* stride,
 172                          struct pipe_buffer* buffer)
 173 {
 174     struct r300_texture* tex;
 175
 176     /* XXX we should start doing mips now... */
 177     if (base->target != PIPE_TEXTURE_2D ||
 178         base->last_level != 0 ||
 179         base->depth[0] != 1) {
 180         return NULL;
 181     }
 182
 183     tex = CALLOC_STRUCT(r300_texture);
 184     if (!tex) {
 185         return NULL;
 186     }
 187
 188     tex->tex = *base;
 189     pipe_reference_init(&tex->tex.reference, 1);
 190     tex->tex.screen = screen;
 191
 192     tex->stride = *stride;
 193
 194     /* XXX */
 195     r300_setup_texture_state(tex, tex->tex.width[0], tex->tex.height[0],
 196             tex->stride, 0);
 197
 198     pipe_buffer_reference(&tex->buffer, buffer);
 199
 200     return (struct pipe_texture*)tex;
 201 }
 202
 203 void r300_init_screen_texture_functions(struct pipe_screen* screen)
 204 {
 205     screen->texture_create = r300_texture_create;
 206     screen->texture_destroy = r300_texture_destroy;
 207     screen->get_tex_surface = r300_get_tex_surface;
 208     screen->tex_surface_destroy = r300_tex_surface_destroy;
 209     screen->texture_blanket = r300_texture_blanket;
 210 }
 211
 212 boolean r300_get_texture_buffer(struct pipe_texture* texture,
 213                                 struct pipe_buffer** buffer,
 214                                 unsigned* stride)
 215 {
 216     struct r300_texture* tex = (struct r300_texture*)texture;
 217     if (!tex) {
 218         return FALSE;
 219     }
 220
 221     pipe_buffer_reference(buffer, tex->buffer);
 222
 223     if (stride) {
 224         *stride = tex->stride;
 225     }
 226
 227     return TRUE;
 228 }