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             return 1;
  92         case PIPE_CAP_GLSL:
  93             /* I'll be frank. This is a lie.
  94              *
  95              * We don't truly support GLSL on any of this driver's chipsets.
  96              * To be fair, no chipset supports the full GLSL specification
  97              * to the best of our knowledge, but some of the less esoteric
  98              * features are still missing here.
  99              *
 100              * Rather than cripple ourselves intentionally, I'm going to set
 101              * this flag, and as Gallium's interface continues to change, I
 102              * hope that this single monolithic GLSL enable can slowly get
 103              * split down into many different pieces and the state tracker
 104              * will handle fallbacks transparently, like it should.
 105              *
 106              * ~ C.
 107              */
 108             return 1;
 109         case PIPE_CAP_DUAL_SOURCE_BLEND:
 110             return 0;
 111         case PIPE_CAP_ANISOTROPIC_FILTER:
 112             return 1;
 113         case PIPE_CAP_POINT_SPRITE:
 114             return 1;
 115         case PIPE_CAP_MAX_RENDER_TARGETS:
 116             return 4;
 117         case PIPE_CAP_OCCLUSION_QUERY:
 118             return 1;
 119         case PIPE_CAP_TEXTURE_SHADOW_MAP:
 120             return 1;
 121         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 122         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 123         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 124             if (r300screen->caps.is_r500) {
 125                 /* 13 == 4096 */
 126                 return 13;
 127             } else {
 128                 /* 12 == 2048 */
 129                 return 12;
 130             }
 131         case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 132             return 1;
 133         case PIPE_CAP_TEXTURE_MIRROR_REPEAT:
 134             return 1;
 135         case PIPE_CAP_MAX_VERTEX_TEXTURE_UNITS:
 136             return 0;
 137         case PIPE_CAP_TGSI_CONT_SUPPORTED:
 138             return 0;
 139         case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 140             return 1;
 141         case PIPE_CAP_SM3:
 142             if (r300screen->caps.is_r500) {
 143                 return 1;
 144             } else {
 145                 return 0;
 146             }
 147         case PIPE_CAP_MAX_CONST_BUFFERS:
 148             return 1;
 149         case PIPE_CAP_MAX_CONST_BUFFER_SIZE:
 150             return 256;
 151         case PIPE_CAP_INDEP_BLEND_ENABLE:
 152             return 0;
 153         case PIPE_CAP_INDEP_BLEND_FUNC:
 154             return 0;
 155         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 156         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 157             return 1;
 158         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 159         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 160             return 0;
 161         default:
 162             fprintf(stderr, "r300: Implementation error: Bad param %d\n",
 163                 param);
 164             return 0;
 165     }
 166 }
 167
 168 static float r300_get_paramf(struct pipe_screen* pscreen, int param)
 169 {
 170     struct r300_screen* r300screen = r300_screen(pscreen);
 171
 172     switch (param) {
 173         case PIPE_CAP_MAX_LINE_WIDTH:
 174         case PIPE_CAP_MAX_LINE_WIDTH_AA:
 175         case PIPE_CAP_MAX_POINT_WIDTH:
 176         case PIPE_CAP_MAX_POINT_WIDTH_AA:
 177             /* The maximum dimensions of the colorbuffer are our practical
 178              * rendering limits. 2048 pixels should be enough for anybody. */
 179             if (r300screen->caps.is_r500) {
 180                 return 4096.0f;
 181             } else if (r300screen->caps.is_r400) {
 182                 return 4021.0f;
 183             } else {
 184                 return 2560.0f;
 185             }
 186         case PIPE_CAP_MAX_TEXTURE_ANISOTROPY:
 187             return 16.0f;
 188         case PIPE_CAP_MAX_TEXTURE_LOD_BIAS:
 189             return 16.0f;
 190         default:
 191             fprintf(stderr, "r300: Implementation error: Bad paramf %d\n",
 192                 param);
 193             return 0.0f;
 194     }
 195 }
 196
 197 static boolean r300_is_format_supported(struct pipe_screen* screen,
 198                                         enum pipe_format format,
 199                                         enum pipe_texture_target target,
 200                                         unsigned usage,
 201                                         unsigned geom_flags)
 202 {
 203     uint32_t retval = 0;
 204     boolean is_r500 = r300_screen(screen)->caps.is_r500;
 205     boolean is_r400 = r300_screen(screen)->caps.is_r400;
 206     boolean is_z24 = format == PIPE_FORMAT_X8Z24_UNORM ||
 207                      format == PIPE_FORMAT_S8_USCALED_Z24_UNORM;
 208     boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM;
 209     boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM ||
 210                        format == PIPE_FORMAT_RGTC1_SNORM;
 211     boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM ||
 212                        format == PIPE_FORMAT_RGTC2_SNORM;
 213
 214     if (target >= PIPE_MAX_TEXTURE_TYPES) {
 215         fprintf(stderr, "r300: Implementation error: Received bogus texture "
 216             "target %d in %s\n", target, __FUNCTION__);
 217         return FALSE;
 218     }
 219
 220     /* Check sampler format support. */
 221     if ((usage & PIPE_TEXTURE_USAGE_SAMPLER) &&
 222         /* Z24 cannot be sampled from on non-r5xx. */
 223         (is_r500 || !is_z24) &&
 224         /* ATI1N is r5xx-only. */
 225         (is_r500 || !is_ati1n) &&
 226         /* ATI2N is supported on r4xx-r5xx. */
 227         (is_r400 || is_r500 || !is_ati2n) &&
 228         r300_is_sampler_format_supported(format)) {
 229         retval |= PIPE_TEXTURE_USAGE_SAMPLER;
 230     }
 231
 232     /* Check colorbuffer format support. */
 233     if ((usage & (PIPE_TEXTURE_USAGE_RENDER_TARGET |
 234                   PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 235                   PIPE_TEXTURE_USAGE_SCANOUT |
 236                   PIPE_TEXTURE_USAGE_SHARED)) &&
 237         /* 2101010 cannot be rendered to on non-r5xx. */
 238         (is_r500 || !is_color2101010) &&
 239         r300_is_colorbuffer_format_supported(format)) {
 240         retval |= usage &
 241             (PIPE_TEXTURE_USAGE_RENDER_TARGET |
 242              PIPE_TEXTURE_USAGE_DISPLAY_TARGET |
 243              PIPE_TEXTURE_USAGE_SCANOUT |
 244              PIPE_TEXTURE_USAGE_SHARED);
 245     }
 246
 247     /* Check depth-stencil format support. */
 248     if (usage & PIPE_TEXTURE_USAGE_DEPTH_STENCIL &&
 249         r300_is_zs_format_supported(format)) {
 250         retval |= PIPE_TEXTURE_USAGE_DEPTH_STENCIL;
 251     }
 252
 253     return retval == usage;
 254 }
 255
 256 static void r300_destroy_screen(struct pipe_screen* pscreen)
 257 {
 258     struct r300_screen* r300screen = r300_screen(pscreen);
 259     struct r300_winsys_screen *rws = r300_winsys_screen(pscreen);
 260
 261     if (rws)
 262       rws->destroy(rws);
 263
 264     FREE(r300screen);
 265 }
 266
 267 struct pipe_screen* r300_create_screen(struct r300_winsys_screen *rws)
 268 {
 269     struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
 270
 271     if (!r300screen) {
 272         FREE(r300screen);
 273         return NULL;
 274     }
 275
 276     r300screen->caps.pci_id = rws->get_value(rws, R300_VID_PCI_ID);
 277     r300screen->caps.num_frag_pipes = rws->get_value(rws, R300_VID_GB_PIPES);
 278     r300screen->caps.num_z_pipes = rws->get_value(rws, R300_VID_Z_PIPES);
 279
 280     r300_init_debug(r300screen);
 281     r300_parse_chipset(&r300screen->caps);
 282
 283     r300screen->rws = rws;
 284     r300screen->screen.winsys = (struct pipe_winsys*)rws;
 285     r300screen->screen.destroy = r300_destroy_screen;
 286     r300screen->screen.get_name = r300_get_name;
 287     r300screen->screen.get_vendor = r300_get_vendor;
 288     r300screen->screen.get_param = r300_get_param;
 289     r300screen->screen.get_paramf = r300_get_paramf;
 290     r300screen->screen.is_format_supported = r300_is_format_supported;
 291     r300screen->screen.context_create = r300_create_context;
 292
 293     r300_init_screen_texture_functions(&r300screen->screen);
 294
 295     r300_screen_init_buffer_functions(r300screen);
 296     return &r300screen->screen;
 297 }
 298
 299 struct r300_winsys_screen *
 300 r300_winsys_screen(struct pipe_screen *screen)
 301 {
 302     return r300_screen(screen)->rws;
 303 }