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_S3TC:
  84             /* IN THEORY */
  85             return 0;
  86         case PIPE_CAP_TWO_SIDED_STENCIL:
  87             /* IN THEORY */
  88             /* if (r300screen->is_r500) {
  89              * return 1;
  90              * } else {
  91              * return 0;
  92              * } */
  93             return 0;
  94         case PIPE_CAP_ANISOTROPIC_FILTER:
  95             /* IN THEORY */
  96             return 0;
  97         case PIPE_CAP_POINT_SPRITE:
  98             /* IN THEORY */
  99             return 0;
 100         case PIPE_CAP_OCCLUSION_QUERY:
 101             /* IN THEORY */
 102             return 0;
 103         case PIPE_CAP_TEXTURE_SHADOW_MAP:
 104             /* IN THEORY */
 105             return 0;
 106         case PIPE_CAP_GLSL:
 107             /* IN THEORY */
 108             return 0;
 109         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 110             if (r300screen->caps->is_r500) {
 111                 /* 13 == 4096x4096 */
 112                 return 13;
 113             } else {
 114                 /* 12 == 2048x2048 */
 115                 return 12;
 116             }
 117         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 118             /* So, technically, the limit is the same as above, but some math
 119              * shows why this is silly. Assuming RGBA, 4cpp, we can see that
 120              * 4096*4096*4096 = 64.0 GiB exactly, so it's not exactly
 121              * practical. However, if at some point a game really wants this,
 122              * then we can remove this limit. */
 123             if (r300screen->caps->is_r500) {
 124                 /* 9 == 256x256x256 */
 125                 return 9;
 126             } else {
 127                 /* 8 == 128*128*128 */
 128                 return 8;
 129             }
 130         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 131             if (r300screen->caps->is_r500) {
 132                 /* 13 == 4096x4096 */
 133                 return 13;
 134             } else {
 135                 /* 12 == 2048x2048 */
 136                 return 12;
 137             }
 138         case PIPE_CAP_MAX_RENDER_TARGETS:
 139             /* XXX 4 eventually */
 140             return 1;
 141         default:
 142             debug_printf("r300: Implementation error: Bad param %d", param);
 143             return 0;
 144     }
 145 }
 146
 147 static float r300_get_paramf(struct pipe_screen* pscreen, int param)
 148 {
 149     switch (param) {
 150         case PIPE_CAP_MAX_LINE_WIDTH:
 151         case PIPE_CAP_MAX_LINE_WIDTH_AA:
 152             /* XXX this is the biggest thing that will fit in that register.
 153             * Perhaps the actual rendering limits are less? */
 154             return 10922.0f;
 155         case PIPE_CAP_MAX_POINT_WIDTH:
 156         case PIPE_CAP_MAX_POINT_WIDTH_AA:
 157             /* XXX this is the biggest thing that will fit in that register.
 158              * Perhaps the actual rendering limits are less? */
 159             return 10922.0f;
 160         case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 161             return 16.0f;
 162         case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 163             return 16.0f;
 164         default:
 165             debug_printf("r300: Implementation error: Bad paramf %d", param);
 166             return 0.0f;
 167     }
 168 }
 169
 170 /* XXX moar formats */
 171 static boolean check_tex_2d_format(enum pipe_format format)
 172 {
 173     switch (format) {
 174         case PIPE_FORMAT_A8R8G8B8_UNORM:
 175         case PIPE_FORMAT_I8_UNORM:
 176             return TRUE;
 177         default:
 178             debug_printf("r300: Warning: Got unknown format: %d, in %s",
 179                 format, __FUNCTION__);
 180             break;
 181     }
 182
 183     return FALSE;
 184 }
 185
 186 /* XXX moar targets */
 187 static boolean r300_is_format_supported(struct pipe_screen* pscreen,
 188                                         enum pipe_format format,
 189                                         enum pipe_texture_target target,
 190                                         unsigned tex_usage,
 191                                         unsigned geom_flags)
 192 {
 193     switch (target) {
 194         case PIPE_TEXTURE_2D:
 195             return check_tex_2d_format(format);
 196         default:
 197             debug_printf("r300: Warning: Got unknown format target: %d",
 198                 format);
 199             break;
 200     }
 201
 202     return FALSE;
 203 }
 204
 205 static void* r300_surface_map(struct pipe_screen* screen,
 206                               struct pipe_surface* surface,
 207                               unsigned flags)
 208 {
 209     char* map = pipe_buffer_map(screen, surface->buffer, flags);
 210
 211     if (!map) {
 212         return NULL;
 213     }
 214
 215     return map + surface->offset;
 216 }
 217
 218 static void r300_surface_unmap(struct pipe_screen* screen,
 219                                struct pipe_surface* surface)
 220 {
 221     pipe_buffer_unmap(screen, surface->buffer);
 222 }
 223
 224 static void r300_destroy_screen(struct pipe_screen* pscreen)
 225 {
 226     struct r300_screen* r300screen = r300_screen(pscreen);
 227
 228     FREE(r300screen->caps);
 229     FREE(r300screen);
 230 }
 231
 232 struct pipe_screen* r300_create_screen(struct pipe_winsys* winsys,
 233                                        struct r300_winsys* r300_winsys)
 234 {
 235     struct r300_screen* r300screen = CALLOC_STRUCT(r300_screen);
 236     struct r300_capabilities* caps = CALLOC_STRUCT(r300_capabilities);
 237
 238     if (!r300screen || !caps)
 239         return NULL;
 240
 241     caps->pci_id = r300_winsys->pci_id;
 242     caps->num_frag_pipes = r300_winsys->gb_pipes;
 243
 244     r300_parse_chipset(caps);
 245
 246     r300screen->caps = caps;
 247     r300screen->screen.winsys = winsys;
 248     r300screen->screen.destroy = r300_destroy_screen;
 249     r300screen->screen.get_name = r300_get_name;
 250     r300screen->screen.get_vendor = r300_get_vendor;
 251     r300screen->screen.get_param = r300_get_param;
 252     r300screen->screen.get_paramf = r300_get_paramf;
 253     r300screen->screen.is_format_supported = r300_is_format_supported;
 254     r300screen->screen.surface_map = r300_surface_map;
 255     r300screen->screen.surface_unmap = r300_surface_unmap;
 256
 257     r300_init_screen_texture_functions(&r300screen->screen);
 258
 259     return &r300screen->screen;
 260 }