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             /* XXX 4 eventually */
 104             return 1;
 105         case PIPE_CAP_OCCLUSION_QUERY:
 106             /* IN THEORY */
 107             return 0;
 108         case PIPE_CAP_TEXTURE_SHADOW_MAP:
 109             /* IN THEORY */
 110             return 0;
 111         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 112             if (r300screen->caps->is_r500) {
 113                 /* 13 == 4096x4096 */
 114                 return 13;
 115             } else {
 116                 /* 12 == 2048x2048 */
 117                 return 12;
 118             }
 119         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 120             /* So, technically, the limit is the same as above, but some math
 121              * shows why this is silly. Assuming RGBA, 4cpp, we can see that
 122              * 4096*4096*4096 = 64.0 GiB exactly, so it's not exactly
 123              * practical. However, if at some point a game really wants this,
 124              * then we can remove this limit. */
 125             if (r300screen->caps->is_r500) {
 126                 /* 9 == 256x256x256 */
 127                 return 9;
 128             } else {
 129                 /* 8 == 128*128*128 */
 130                 return 8;
 131             }
 132         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 133             if (r300screen->caps->is_r500) {
 134                 /* 13 == 4096x4096 */
 135                 return 13;
 136             } else {
 137                 /* 12 == 2048x2048 */
 138                 return 12;
 139             }
 140         case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 141             return 1;
 142         case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
 143             return 1;
 144         case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
 145             /* XXX guessing */
 146             return 2;
 147         default:
 148             debug_printf("r300: Implementation error: Bad param %d\n",
 149                 param);
 150             return 0;
 151     }
 152 }
 153
 154 static float r300_get_paramf(struct pipe_screen* pscreen, int param)
 155 {
 156     switch (param) {
 157         case PIPE_CAP_MAX_LINE_WIDTH:
 158         case PIPE_CAP_MAX_LINE_WIDTH_AA:
 159             /* XXX this is the biggest thing that will fit in that register.
 160             * Perhaps the actual rendering limits are less? */
 161             return 10922.0f;
 162         case PIPE_CAP_MAX_POINT_WIDTH:
 163         case PIPE_CAP_MAX_POINT_WIDTH_AA:
 164             /* XXX this is the biggest thing that will fit in that register.
 165              * Perhaps the actual rendering limits are less? */
 166             return 10922.0f;
 167         case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 168             return 16.0f;
 169         case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 170             return 16.0f;
 171         default:
 172             debug_printf("r300: Implementation error: Bad paramf %d\n",
 173                 param);
 174             return 0.0f;
 175     }
 176 }
 177
 178 /* XXX moar formats */
 179 static boolean check_tex_2d_format(enum pipe_format format)
 180 {
 181     switch (format) {
 182         case PIPE_FORMAT_A8R8G8B8_UNORM:
 183         case PIPE_FORMAT_I8_UNORM:
 184             return TRUE;
 185         default:
 186             debug_printf("r300: Warning: Got unknown format: %s, in %s\n",
 187                 pf_name(format), __FUNCTION__);
 188             break;
 189     }
 190
 191     return FALSE;
 192 }
 193
 194 /* XXX moar targets */
 195 static boolean r300_is_format_supported(struct pipe_screen* pscreen,
 196                                         enum pipe_format format,
 197                                         enum pipe_texture_target target,
 198                                         unsigned tex_usage,
 199                                         unsigned geom_flags)
 200 {
 201     switch (target) {
 202         case PIPE_TEXTURE_2D:
 203             return check_tex_2d_format(format);
 204         default:
 205             debug_printf("r300: Warning: Got unknown format target: %d\n",
 206                 format);
 207             break;
 208     }
 209
 210     return FALSE;
 211 }
 212
 213 static void* r300_surface_map(struct pipe_screen* screen,
 214                               struct pipe_surface* surface,
 215                               unsigned flags)
 216 {
 217     char* map = pipe_buffer_map(screen, surface->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     pipe_buffer_unmap(screen, surface->buffer);
 230 }
 231
 232 static void r300_destroy_screen(struct pipe_screen* pscreen)
 233 {
 234     struct r300_screen* r300screen = r300_screen(pscreen);
 235
 236     FREE(r300screen->caps);
 237     FREE(r300screen);
 238 }
 239
 240 struct pipe_screen* r300_create_screen(struct pipe_winsys* winsys,
 241                                        struct r300_winsys* r300_winsys)
 242 {
 243     struct r300_screen* r300screen = CALLOC_STRUCT(r300_screen);
 244     struct r300_capabilities* caps = CALLOC_STRUCT(r300_capabilities);
 245
 246     if (!r300screen || !caps)
 247         return NULL;
 248
 249     caps->pci_id = r300_winsys->pci_id;
 250     caps->num_frag_pipes = r300_winsys->gb_pipes;
 251
 252     r300_parse_chipset(caps);
 253
 254     r300screen->caps = caps;
 255     r300screen->screen.winsys = winsys;
 256     r300screen->screen.destroy = r300_destroy_screen;
 257     r300screen->screen.get_name = r300_get_name;
 258     r300screen->screen.get_vendor = r300_get_vendor;
 259     r300screen->screen.get_param = r300_get_param;
 260     r300screen->screen.get_paramf = r300_get_paramf;
 261     r300screen->screen.is_format_supported = r300_is_format_supported;
 262     r300screen->screen.surface_map = r300_surface_map;
 263     r300screen->screen.surface_unmap = r300_surface_unmap;
 264
 265     r300_init_screen_texture_functions(&r300screen->screen);
 266     u_simple_screen_init(&r300screen->screen);
 267
 268     return &r300screen->screen;
 269 }