src/gallium/drivers/r300/r300_screen.c

   1 /*
   2  * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
   3  * Copyright 2010 Marek Olšák <maraeo@gmail.com>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * on the rights to use, copy, modify, merge, publish, distribute, sub
   9  * license, and/or sell copies of the Software, and to permit persons to whom
  10  * the Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  20  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  22  * USE OR OTHER DEALINGS IN THE SOFTWARE. */
  23
  24 #include "util/u_format.h"
  25 #include "util/u_memory.h"
  26
  27 #include "r300_context.h"
  28 #include "r300_texture.h"
  29 #include "r300_screen_buffer.h"
  30 #include "r300_winsys.h"
  31
  32 /* Return the identifier behind whom the brave coders responsible for this
  33  * amalgamation of code, sweat, and duct tape, routinely obscure their names.
  34  *
  35  * ...I should have just put "Corbin Simpson", but I'm not that cool.
  36  *
  37  * (Or egotistical. Yet.) */
  38 static const char* r300_get_vendor(struct pipe_screen* pscreen)
  39 {
  40     return "X.Org R300 Project";
  41 }
  42
  43 static const char* chip_families[] = {
  44     "R300",
  45     "R350",
  46     "R360",
  47     "RV350",
  48     "RV370",
  49     "RV380",
  50     "R420",
  51     "R423",
  52     "R430",
  53     "R480",
  54     "R481",
  55     "RV410",
  56     "RS400",
  57     "RC410",
  58     "RS480",
  59     "RS482",
  60     "RS600",
  61     "RS690",
  62     "RS740",
  63     "RV515",
  64     "R520",
  65     "RV530",
  66     "R580",
  67     "RV560",
  68     "RV570"
  69 };
  70
  71 static const char* r300_get_name(struct pipe_screen* pscreen)
  72 {
  73     struct r300_screen* r300screen = r300_screen(pscreen);
  74
  75     return chip_families[r300screen->caps->family];
  76 }
  77
  78 static int r300_get_param(struct pipe_screen* pscreen, int param)
  79 {
  80     struct r300_screen* r300screen = r300_screen(pscreen);
  81
  82     switch (param) {
  83         case PIPE_CAP_MAX_TEXTURE_IMAGE_UNITS:
  84         case PIPE_CAP_MAX_COMBINED_SAMPLERS:
  85             return r300screen->caps->num_tex_units;
  86         case PIPE_CAP_NPOT_TEXTURES:
  87             /* XXX enable now to get GL2.1 API,
  88              * figure out later how to emulate this */
  89             return 1;
  90         case PIPE_CAP_TWO_SIDED_STENCIL:
  91             if (r300screen->caps->is_r500) {
  92                 return 1;
  93             } else {
  94                 return 0;
  95             }
  96         case PIPE_CAP_GLSL:
  97             /* I'll be frank. This is a lie.
  98              *
  99              * We don't truly support GLSL on any of this driver's chipsets.
 100              * To be fair, no chipset supports the full GLSL specification
 101              * to the best of our knowledge, but some of the less esoteric
 102              * features are still missing here.
 103              *
 104              * Rather than cripple ourselves intentionally, I'm going to set
 105              * this flag, and as Gallium's interface continues to change, I
 106              * hope that this single monolithic GLSL enable can slowly get
 107              * split down into many different pieces and the state tracker
 108              * will handle fallbacks transparently, like it should.
 109              *
 110              * ~ C.
 111              */
 112             return 1;
 113         case PIPE_CAP_DUAL_SOURCE_BLEND:
 114             return 0;
 115         case PIPE_CAP_ANISOTROPIC_FILTER:
 116             return 1;
 117         case PIPE_CAP_POINT_SPRITE:
 118             return 1;
 119         case PIPE_CAP_MAX_RENDER_TARGETS:
 120             return 4;
 121         case PIPE_CAP_OCCLUSION_QUERY:
 122             return 1;
 123         case PIPE_CAP_TEXTURE_SHADOW_MAP:
 124             return 1;
 125         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 126         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 127         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 128             if (r300screen->caps->is_r500) {
 129                 /* 13 == 4096 */
 130                 return 13;
 131             } else {
 132                 /* 12 == 2048 */
 133                 return 12;
 134             }
 135         case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 136             return 1;
 137         case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
 138             return 1;
 139         case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
 140             return 0;
 141         case PIPE_CAP_TGSI_CONT_SUPPORTED:
 142             return 0;
 143         case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 144             return 1;
 145         case PIPE_CAP_SM3:
 146             if (r300screen->caps->is_r500) {
 147                 return 1;
 148             } else {
 149                 return 0;
 150             }
 151         case PIPE_CAP_MAX_CONST_BUFFERS:
 152             return 1;
 153         case PIPE_CAP_MAX_CONST_BUFFER_SIZE:
 154             return 256;
 155         case PIPE_CAP_INDEP_BLEND_ENABLE:
 156             return 0;
 157         case PIPE_CAP_INDEP_BLEND_FUNC:
 158             return 0;
 159         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 160         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 161             return 1;
 162         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 163         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 164             return 0;
 165         default:
 166             fprintf(stderr, "r300: Implementation error: Bad param %d\n",
 167                 param);
 168             return 0;
 169     }
 170 }
 171
 172 static float r300_get_paramf(struct pipe_screen* pscreen, int param)
 173 {
 174     struct r300_screen* r300screen = r300_screen(pscreen);
 175
 176     switch (param) {
 177         case PIPE_CAP_MAX_LINE_WIDTH:
 178         case PIPE_CAP_MAX_LINE_WIDTH_AA:
 179         case PIPE_CAP_MAX_POINT_WIDTH:
 180         case PIPE_CAP_MAX_POINT_WIDTH_AA:
 181             /* The maximum dimensions of the colorbuffer are our practical
 182              * rendering limits. 2048 pixels should be enough for anybody. */
 183             if (r300screen->caps->is_r500) {
 184                 return 4096.0f;
 185             } else if (r300screen->caps->is_r400) {
 186                 return 4021.0f;
 187             } else {
 188                 return 2560.0f;
 189             }
 190         case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 191             return 16.0f;
 192         case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 193             return 16.0f;
 194         default:
 195             fprintf(stderr, "r300: Implementation error: Bad paramf %d\n",
 196                 param);
 197             return 0.0f;
 198     }
 199 }
 200
 201 static boolean r300_is_format_supported(struct pipe_screen* screen,
 202                                         enum pipe_format format,
 203                                         enum pipe_texture_target target,
 204                                         unsigned usage,
 205                                         unsigned geom_flags)
 206 {
 207     uint32_t retval = 0;
 208     boolean is_r500 = r300_screen(screen)->caps->is_r500;
 209     boolean is_r400 = r300_screen(screen)->caps->is_r400;
 210     boolean is_z24 = format == PIPE_FORMAT_X8Z24_UNORM ||
 211                      format == PIPE_FORMAT_S8_USCALED_Z24_UNORM;
 212     boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM;
 213     boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM ||
 214                        format == PIPE_FORMAT_RGTC1_SNORM;
 215     boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM ||
 216                        format == PIPE_FORMAT_RGTC2_SNORM;
 217
 218     if (target >= PIPE_MAX_TEXTURE_TYPES) {
 219         fprintf(stderr, "r300: Implementation error: Received bogus texture "
 220             "target %d in %s\n", target, __FUNCTION__);
 221         return FALSE;
 222     }
 223
 224     /* Check sampler format support. */
 225     if ((usage & PIPE_TEXTURE_USAGE_SAMPLER) &&
 226         /* Z24 cannot be sampled from on non-r5xx. */
 227         (is_r500 || !is_z24) &&
 228         /* ATI1N is r5xx-only. */
 229         (is_r500 || !is_ati1n) &&
 230         /* ATI2N is supported on r4xx-r5xx. */
 231         (is_r400 || is_r500 || !is_ati2n) &&
 232         r300_is_sampler_format_supported(format)) {
 233         retval |= PIPE_TEXTURE_USAGE_SAMPLER;
 234     }
 235
 236     /* Check colorbuffer format support. */
 237     if ((usage & (PIPE_TEXTURE_USAGE_RENDER_TARGET |
 238                   PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 239                   PIPE_TEXTURE_USAGE_SCANOUT |
 240                   PIPE_TEXTURE_USAGE_SHARED)) &&
 241         /* 2101010 cannot be rendered to on non-r5xx. */
 242         (is_r500 || !is_color2101010) &&
 243         r300_is_colorbuffer_format_supported(format)) {
 244         retval |= usage &
 245             (PIPE_TEXTURE_USAGE_RENDER_TARGET |
 246              PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 247              PIPE_TEXTURE_USAGE_SCANOUT |
 248              PIPE_TEXTURE_USAGE_SHARED);
 249     }
 250
 251     /* Check depth-stencil format support. */
 252     if (usage & PIPE_TEXTURE_USAGE_DEPTH_STENCIL &&
 253         r300_is_zs_format_supported(format)) {
 254         retval |= PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
 255     }
 256
 257     return retval == usage;
 258 }
 259
 260 static void r300_destroy_screen(struct pipe_screen* pscreen)
 261 {
 262     struct r300_screen* r300screen = r300_screen(pscreen);
 263     struct r300_winsys_screen *rws = r300_winsys_screen(pscreen);
 264
 265     if (rws)
 266       rws->destroy(rws);
 267
 268     FREE(r300screen->caps);
 269     FREE(r300screen);
 270 }
 271
 272 struct pipe_screen* r300_create_screen(struct r300_winsys_screen *rws)
 273 {
 274     struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
 275     struct r300_capabilities *caps = CALLOC_STRUCT(r300_capabilities);
 276
 277     if (!r300screen || !caps) {
 278         FREE(r300screen);
 279         FREE(caps);
 280         return NULL;
 281     }
 282
 283     caps->pci_id = rws->get_value(rws, R300_VID_PCI_ID);
 284     caps->num_frag_pipes = rws->get_value(rws, R300_VID_GB_PIPES);
 285     caps->num_z_pipes = rws->get_value(rws, R300_VID_Z_PIPES);
 286
 287     r300_init_debug(r300screen);
 288     r300_parse_chipset(caps);
 289
 290     r300screen->caps = caps;
 291     r300screen->rws = rws;
 292     r300screen->screen.winsys = (struct pipe_winsys*)rws;
 293     r300screen->screen.destroy = r300_destroy_screen;
 294     r300screen->screen.get_name = r300_get_name;
 295     r300screen->screen.get_vendor = r300_get_vendor;
 296     r300screen->screen.get_param = r300_get_param;
 297     r300screen->screen.get_paramf = r300_get_paramf;
 298     r300screen->screen.is_format_supported = r300_is_format_supported;
 299     r300screen->screen.context_create = r300_create_context;
 300
 301     r300_init_screen_texture_functions(&r300screen->screen);
 302
 303     r300_screen_init_buffer_functions(r300screen);
 304     return &r300screen->screen;
 305 }
 306
 307 struct r300_winsys_screen *
 308 r300_winsys_screen(struct pipe_screen *screen)
 309 {
 310     return r300_screen(screen)->rws;
 311 }