src/gallium/drivers/r300/r300_screen.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_screen.h"
  24
  25 /* Return the identifier behind whom the brave coders responsible for this
  26  * amalgamation of code, sweat, and duct tape, routinely obscure their names.
  27  *
  28  * ...I should have just put "Corbin Simpson", but I'm not that cool.
  29  *
  30  * (Or egotistical. Yet.) */
  31 static const char* r300_get_vendor(struct pipe_screen* pscreen)
  32 {
  33     return "X.Org R300 Project";
  34 }
  35
  36 static const char* chip_families[] = {
  37     "R300",
  38     "R350",
  39     "R360",
  40     "RV350",
  41     "RV370",
  42     "RV380",
  43     "R420",
  44     "R423",
  45     "R430",
  46     "R480",
  47     "R481",
  48     "RV410",
  49     "RS400",
  50     "RC410",
  51     "RS480",
  52     "RS482",
  53     "RS690",
  54     "RS740",
  55     "RV515",
  56     "R520",
  57     "RV530",
  58     "R580",
  59     "RV560",
  60     "RV570"
  61 };
  62
  63 static const char* r300_get_name(struct pipe_screen* pscreen)
  64 {
  65     struct r300_screen* r300screen = r300_screen(pscreen);
  66
  67     return chip_families[r300screen->caps->family];
  68 }
  69
  70 static int r300_get_param(struct pipe_screen* pscreen, int param)
  71 {
  72     struct r300_screen* r300screen = r300_screen(pscreen);
  73
  74     switch (param) {
  75         /* XXX cases marked "IN THEORY" are possible on the hardware,
  76          * but haven't been implemented yet. */
  77         case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  78             /* XXX I'm told this goes up to 16 */
  79             return 8;
  80         case PIPE_CAP_NPOT_TEXTURES:
  81             /* IN THEORY */
  82             return 0;
  83         case PIPE_CAP_TWO_SIDED_STENCIL:
  84             if (r300screen->caps->is_r500) {
  85                 return 1;
  86             } else {
  87                 return 0;
  88             }
  89             return 0;
  90         case PIPE_CAP_GLSL:
  91             /* IN THEORY */
  92             return 0;
  93         case PIPE_CAP_S3TC:
  94             /* IN THEORY */
  95             return 0;
  96         case PIPE_CAP_ANISOTROPIC_FILTER:
  97             /* IN THEORY */
  98             return 0;
  99         case PIPE_CAP_POINT_SPRITE:
 100             /* IN THEORY */
 101             return 0;
 102         case PIPE_CAP_MAX_RENDER_TARGETS:
 103             return 4;
 104         case PIPE_CAP_OCCLUSION_QUERY:
 105             /* IN THEORY */
 106             return 0;
 107         case PIPE_CAP_TEXTURE_SHADOW_MAP:
 108             /* IN THEORY */
 109             return 0;
 110         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 111             if (r300screen->caps->is_r500) {
 112                 /* 13 == 4096x4096 */
 113                 return 13;
 114             } else {
 115                 /* 12 == 2048x2048 */
 116                 return 12;
 117             }
 118         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 119             /* So, technically, the limit is the same as above, but some math
 120              * shows why this is silly. Assuming RGBA, 4cpp, we can see that
 121              * 4096*4096*4096 = 64.0 GiB exactly, so it's not exactly
 122              * practical. However, if at some point a game really wants this,
 123              * then we can remove this limit. */
 124             if (r300screen->caps->is_r500) {
 125                 /* 9 == 256x256x256 */
 126                 return 9;
 127             } else {
 128                 /* 8 == 128*128*128 */
 129                 return 8;
 130             }
 131         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 132             if (r300screen->caps->is_r500) {
 133                 /* 13 == 4096x4096 */
 134                 return 13;
 135             } else {
 136                 /* 12 == 2048x2048 */
 137                 return 12;
 138             }
 139         case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 140             return 1;
 141         case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
 142             return 1;
 143         case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
 144             /* XXX guessing */
 145             return 2;
 146         default:
 147             debug_printf("r300: Implementation error: Bad param %d\n",
 148                 param);
 149             return 0;
 150     }
 151 }
 152
 153 static float r300_get_paramf(struct pipe_screen* pscreen, int param)
 154 {
 155     switch (param) {
 156         case PIPE_CAP_MAX_LINE_WIDTH:
 157         case PIPE_CAP_MAX_LINE_WIDTH_AA:
 158             /* XXX this is the biggest thing that will fit in that register.
 159             * Perhaps the actual rendering limits are less? */
 160             return 10922.0f;
 161         case PIPE_CAP_MAX_POINT_WIDTH:
 162         case PIPE_CAP_MAX_POINT_WIDTH_AA:
 163             /* XXX this is the biggest thing that will fit in that register.
 164              * Perhaps the actual rendering limits are less? */
 165             return 10922.0f;
 166         case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 167             return 16.0f;
 168         case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 169             return 16.0f;
 170         default:
 171             debug_printf("r300: Implementation error: Bad paramf %d\n",
 172                 param);
 173             return 0.0f;
 174     }
 175 }
 176
 177 /* XXX moar formats */
 178 static boolean check_tex_2d_format(enum pipe_format format)
 179 {
 180     switch (format) {
 181         case PIPE_FORMAT_A8R8G8B8_UNORM:
 182         case PIPE_FORMAT_I8_UNORM:
 183             return TRUE;
 184         default:
 185             debug_printf("r300: Warning: Got unknown format: %s, in %s\n",
 186                 pf_name(format), __FUNCTION__);
 187             break;
 188     }
 189
 190     return FALSE;
 191 }
 192
 193 /* XXX moar targets */
 194 static boolean r300_is_format_supported(struct pipe_screen* pscreen,
 195                                         enum pipe_format format,
 196                                         enum pipe_texture_target target,
 197                                         unsigned tex_usage,
 198                                         unsigned geom_flags)
 199 {
 200     switch (target) {
 201         case PIPE_TEXTURE_2D:
 202             return check_tex_2d_format(format);
 203         default:
 204             debug_printf("r300: Warning: Got unknown format target: %d\n",
 205                 format);
 206             break;
 207     }
 208
 209     return FALSE;
 210 }
 211
 212 static void* r300_surface_map(struct pipe_screen* screen,
 213                               struct pipe_surface* surface,
 214                               unsigned flags)
 215 {
 216     struct r300_texture* tex = (struct r300_texture*)surface->texture;
 217     char* map = pipe_buffer_map(screen, tex->buffer, flags);
 218
 219     if (!map) {
 220         return NULL;
 221     }
 222
 223     return map + surface->offset;
 224 }
 225
 226 static void r300_surface_unmap(struct pipe_screen* screen,
 227                                struct pipe_surface* surface)
 228 {
 229     struct r300_texture* tex = (struct r300_texture*)surface->texture;
 230     pipe_buffer_unmap(screen, tex->buffer);
 231 }
 232
 233 static void r300_destroy_screen(struct pipe_screen* pscreen)
 234 {
 235     struct r300_screen* r300screen = r300_screen(pscreen);
 236
 237     FREE(r300screen->caps);
 238     FREE(r300screen);
 239 }
 240
 241 struct pipe_screen* r300_create_screen(struct pipe_winsys* winsys,
 242                                        struct r300_winsys* r300_winsys)
 243 {
 244     struct r300_screen* r300screen = CALLOC_STRUCT(r300_screen);
 245     struct r300_capabilities* caps = CALLOC_STRUCT(r300_capabilities);
 246
 247     if (!r300screen || !caps)
 248         return NULL;
 249
 250     caps->pci_id = r300_winsys->pci_id;
 251     caps->num_frag_pipes = r300_winsys->gb_pipes;
 252
 253     r300_parse_chipset(caps);
 254
 255     r300screen->caps = caps;
 256     r300screen->screen.winsys = winsys;
 257     r300screen->screen.destroy = r300_destroy_screen;
 258     r300screen->screen.get_name = r300_get_name;
 259     r300screen->screen.get_vendor = r300_get_vendor;
 260     r300screen->screen.get_param = r300_get_param;
 261     r300screen->screen.get_paramf = r300_get_paramf;
 262     r300screen->screen.is_format_supported = r300_is_format_supported;
 263     r300screen->screen.surface_map = r300_surface_map;
 264     r300screen->screen.surface_unmap = r300_surface_unmap;
 265
 266     r300_init_screen_texture_functions(&r300screen->screen);
 267     u_simple_screen_init(&r300screen->screen);
 268
 269     return &r300screen->screen;
 270 }