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_texture_state(struct r300_texture* tex,
  31                                      unsigned width,
  32                                      unsigned height,
  33                                      unsigned pitch)
  34 {
  35     struct r300_texture_state* state = &tex->state;
  36
  37     state->format0 = R300_TX_WIDTH((width - 1) & 0x7ff) |
  38         R300_TX_HEIGHT((height - 1) & 0x7ff) | R300_TX_PITCH_EN;
  39
  40     /* XXX */
  41     state->format1 = R300_TX_FORMAT_A8R8G8B8;
  42
  43     state->format2 = pitch - 1;
  44
  45     /* XXX
  46     if (width > 2048) {
  47         state->pitch |= R300_TXWIDTH_11;
  48     }
  49     if (height > 2048) {
  50         state->pitch |= R300_TXHEIGHT_11;
  51     } */
  52 }
  53
  54 static void r300_setup_miptree(struct r300_texture* tex)
  55 {
  56     struct pipe_texture* base = &tex->tex;
  57     int stride, size, offset;
  58     int i;
  59
  60     for (i = 0; i <= base->last_level; i++) {
  61         if (i > 0) {
  62             base->width[i] = minify(base->width[i-1]);
  63             base->height[i] = minify(base->height[i-1]);
  64             base->depth[i] = minify(base->depth[i-1]);
  65         }
  66
  67         base->nblocksx[i] = pf_get_nblocksx(&base->block, base->width[i]);
  68         base->nblocksy[i] = pf_get_nblocksy(&base->block, base->width[i]);
  69
  70         /* Radeons enjoy things in multiples of 32. */
  71         /* XXX this can be 32 when POT */
  72         stride = (base->nblocksx[i] * base->block.size + 63) & ~63;
  73         size = stride * base->nblocksy[i] * base->depth[i];
  74
  75         tex->offset[i] = (tex->size + 63) & ~63;
  76         tex->size = tex->offset[i] + size;
  77
  78         if (i == 0) {
  79             tex->stride = stride;
  80         }
  81     }
  82 }
  83
  84 /* Create a new texture. */
  85 static struct pipe_texture*
  86     r300_texture_create(struct pipe_screen* screen,
  87                         const struct pipe_texture* template)
  88 {
  89     struct r300_texture* tex = CALLOC_STRUCT(r300_texture);
  90
  91     if (!tex) {
  92         return NULL;
  93     }
  94
  95     tex->tex = *template;
  96     pipe_reference_init(&tex->tex.reference, 1);
  97     tex->tex.screen = screen;
  98
  99     r300_setup_miptree(tex);
 100
 101     /* XXX */
 102     r300_setup_texture_state(tex, tex->tex.width[0], tex->tex.height[0],
 103             tex->tex.width[0]);
 104
 105     tex->buffer = screen->buffer_create(screen, 64,
 106                                         PIPE_BUFFER_USAGE_PIXEL,
 107                                         tex->size);
 108
 109     if (!tex->buffer) {
 110         FREE(tex);
 111         return NULL;
 112     }
 113
 114     return (struct pipe_texture*)tex;
 115 }
 116
 117 static void r300_texture_destroy(struct pipe_texture* texture)
 118 {
 119     struct r300_texture* tex = (struct r300_texture*)texture;
 120
 121     pipe_buffer_reference(&tex->buffer, NULL);
 122
 123     FREE(tex);
 124 }
 125
 126 static struct pipe_surface* r300_get_tex_surface(struct pipe_screen* screen,
 127                                                  struct pipe_texture* texture,
 128                                                  unsigned face,
 129                                                  unsigned level,
 130                                                  unsigned zslice,
 131                                                  unsigned flags)
 132 {
 133     struct r300_texture* tex = (struct r300_texture*)texture;
 134     struct pipe_surface* surface = CALLOC_STRUCT(pipe_surface);
 135     unsigned offset;
 136
 137     /* XXX this is certainly dependent on tex target */
 138     offset = tex->offset[level];
 139
 140     if (surface) {
 141         pipe_reference_init(&surface->reference, 1);
 142         pipe_texture_reference(&surface->texture, texture);
 143         surface->format = texture->format;
 144         surface->width = texture->width[level];
 145         surface->height = texture->height[level];
 146         surface->offset = offset;
 147         surface->usage = flags;
 148     }
 149
 150     return surface;
 151 }
 152
 153 static void r300_tex_surface_destroy(struct pipe_surface* s)
 154 {
 155     pipe_texture_reference(&s->texture, NULL);
 156     FREE(s);
 157 }
 158
 159 static struct pipe_texture*
 160     r300_texture_blanket(struct pipe_screen* screen,
 161                          const struct pipe_texture* base,
 162                          const unsigned* stride,
 163                          struct pipe_buffer* buffer)
 164 {
 165     struct r300_texture* tex;
 166
 167     if (base->target != PIPE_TEXTURE_2D ||
 168         base->last_level != 0 ||
 169         base->depth[0] != 1) {
 170         return NULL;
 171     }
 172
 173     tex = CALLOC_STRUCT(r300_texture);
 174     if (!tex) {
 175         return NULL;
 176     }
 177
 178     tex->tex = *base;
 179     pipe_reference_init(&tex->tex.reference, 1);
 180     tex->tex.screen = screen;
 181
 182     tex->stride = *stride;
 183
 184     r300_setup_texture_state(tex, tex->tex.width[0], tex->tex.height[0],
 185             tex->stride);
 186
 187     pipe_buffer_reference(&tex->buffer, buffer);
 188
 189     return (struct pipe_texture*)tex;
 190 }
 191
 192 void r300_init_screen_texture_functions(struct pipe_screen* screen)
 193 {
 194     screen->texture_create = r300_texture_create;
 195     screen->texture_destroy = r300_texture_destroy;
 196     screen->get_tex_surface = r300_get_tex_surface;
 197     screen->tex_surface_destroy = r300_tex_surface_destroy;
 198     screen->texture_blanket = r300_texture_blanket;
 199 }
 200
 201 boolean r300_get_texture_buffer(struct pipe_texture* texture,
 202                                 struct pipe_buffer** buffer,
 203                                 unsigned* stride)
 204 {
 205     struct r300_texture* tex = (struct r300_texture*)texture;
 206     if (!tex) {
 207         return FALSE;
 208     }
 209
 210     pipe_buffer_reference(buffer, tex->buffer);
 211
 212     if (stride) {
 213         *stride = tex->stride;
 214     }
 215
 216     return TRUE;
 217 }