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_format_s3tc.h"
  26 #include "util/u_memory.h"
  27 #include "os/os_time.h"
  28 #include "vl/vl_decoder.h"
  29 #include "vl/vl_video_buffer.h"
  30
  31 #include "r300_context.h"
  32 #include "r300_texture.h"
  33 #include "r300_screen_buffer.h"
  34 #include "r300_state_inlines.h"
  35 #include "r300_public.h"
  36
  37 #include "draw/draw_context.h"
  38
  39 /* Return the identifier behind whom the brave coders responsible for this
  40  * amalgamation of code, sweat, and duct tape, routinely obscure their names.
  41  *
  42  * ...I should have just put "Corbin Simpson", but I'm not that cool.
  43  *
  44  * (Or egotistical. Yet.) */
  45 static const char* r300_get_vendor(struct pipe_screen* pscreen)
  46 {
  47     return "X.Org R300 Project";
  48 }
  49
  50 static const char* r300_get_device_vendor(struct pipe_screen* pscreen)
  51 {
  52     return "ATI";
  53 }
  54
  55 static const char* chip_families[] = {
  56     "unknown",
  57     "ATI R300",
  58     "ATI R350",
  59     "ATI RV350",
  60     "ATI RV370",
  61     "ATI RV380",
  62     "ATI RS400",
  63     "ATI RC410",
  64     "ATI RS480",
  65     "ATI R420",
  66     "ATI R423",
  67     "ATI R430",
  68     "ATI R480",
  69     "ATI R481",
  70     "ATI RV410",
  71     "ATI RS600",
  72     "ATI RS690",
  73     "ATI RS740",
  74     "ATI RV515",
  75     "ATI R520",
  76     "ATI RV530",
  77     "ATI R580",
  78     "ATI RV560",
  79     "ATI RV570"
  80 };
  81
  82 static const char* r300_get_name(struct pipe_screen* pscreen)
  83 {
  84     struct r300_screen* r300screen = r300_screen(pscreen);
  85
  86     return chip_families[r300screen->caps.family];
  87 }
  88
  89 static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
  90 {
  91     struct r300_screen* r300screen = r300_screen(pscreen);
  92     boolean is_r500 = r300screen->caps.is_r500;
  93
  94     switch (param) {
  95         /* Supported features (boolean caps). */
  96         case PIPE_CAP_NPOT_TEXTURES:
  97         case PIPE_CAP_MIXED_FRAMEBUFFER_SIZES:
  98         case PIPE_CAP_TWO_SIDED_STENCIL:
  99         case PIPE_CAP_ANISOTROPIC_FILTER:
 100         case PIPE_CAP_POINT_SPRITE:
 101         case PIPE_CAP_OCCLUSION_QUERY:
 102         case PIPE_CAP_TEXTURE_SHADOW_MAP:
 103         case PIPE_CAP_TEXTURE_MIRROR_CLAMP:
 104         case PIPE_CAP_BLEND_EQUATION_SEPARATE:
 105         case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR:
 106         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT:
 107         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER:
 108         case PIPE_CAP_CONDITIONAL_RENDER:
 109         case PIPE_CAP_TEXTURE_BARRIER:
 110         case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS:
 111         case PIPE_CAP_USER_INDEX_BUFFERS:
 112         case PIPE_CAP_USER_CONSTANT_BUFFERS:
 113         case PIPE_CAP_PREFER_BLIT_BASED_TEXTURE_TRANSFER:
 114         case PIPE_CAP_BUFFER_MAP_PERSISTENT_COHERENT:
 115         case PIPE_CAP_CLIP_HALFZ:
 116             return 1;
 117
 118         case PIPE_CAP_MIN_MAP_BUFFER_ALIGNMENT:
 119             return R300_BUFFER_ALIGNMENT;
 120
 121         case PIPE_CAP_CONSTANT_BUFFER_OFFSET_ALIGNMENT:
 122             return 16;
 123
 124         case PIPE_CAP_GLSL_FEATURE_LEVEL:
 125             return 120;
 126
 127         /* r300 cannot do swizzling of compressed textures. Supported otherwise. */
 128         case PIPE_CAP_TEXTURE_SWIZZLE:
 129             return util_format_s3tc_enabled ? r300screen->caps.dxtc_swizzle : 1;
 130
 131         /* We don't support color clamping on r500, so that we can use color
 132          * intepolators for generic varyings. */
 133         case PIPE_CAP_VERTEX_COLOR_CLAMPED:
 134             return !is_r500;
 135
 136         /* Supported on r500 only. */
 137         case PIPE_CAP_VERTEX_COLOR_UNCLAMPED:
 138         case PIPE_CAP_MIXED_COLORBUFFER_FORMATS:
 139         case PIPE_CAP_SM3:
 140             return is_r500 ? 1 : 0;
 141
 142         /* Unsupported features. */
 143         case PIPE_CAP_QUERY_TIME_ELAPSED:
 144         case PIPE_CAP_QUERY_PIPELINE_STATISTICS:
 145         case PIPE_CAP_MAX_DUAL_SOURCE_RENDER_TARGETS:
 146         case PIPE_CAP_INDEP_BLEND_ENABLE:
 147         case PIPE_CAP_INDEP_BLEND_FUNC:
 148         case PIPE_CAP_DEPTH_CLIP_DISABLE:
 149         case PIPE_CAP_SHADER_STENCIL_EXPORT:
 150         case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS:
 151         case PIPE_CAP_TGSI_INSTANCEID:
 152         case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT:
 153         case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER:
 154         case PIPE_CAP_SEAMLESS_CUBE_MAP:
 155         case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE:
 156         case PIPE_CAP_MIN_TEXEL_OFFSET:
 157         case PIPE_CAP_MAX_TEXEL_OFFSET:
 158         case PIPE_CAP_MIN_TEXTURE_GATHER_OFFSET:
 159         case PIPE_CAP_MAX_TEXTURE_GATHER_OFFSET:
 160         case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS:
 161         case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS:
 162         case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS:
 163         case PIPE_CAP_MAX_GEOMETRY_OUTPUT_VERTICES:
 164         case PIPE_CAP_MAX_GEOMETRY_TOTAL_OUTPUT_COMPONENTS:
 165         case PIPE_CAP_MAX_VERTEX_STREAMS:
 166         case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME:
 167         case PIPE_CAP_FRAGMENT_COLOR_CLAMPED:
 168         case PIPE_CAP_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION:
 169         case PIPE_CAP_COMPUTE:
 170         case PIPE_CAP_START_INSTANCE:
 171         case PIPE_CAP_QUERY_TIMESTAMP:
 172         case PIPE_CAP_TEXTURE_MULTISAMPLE:
 173         case PIPE_CAP_CUBE_MAP_ARRAY:
 174         case PIPE_CAP_TEXTURE_BUFFER_OBJECTS:
 175         case PIPE_CAP_TEXTURE_BUFFER_OFFSET_ALIGNMENT:
 176         case PIPE_CAP_TEXTURE_BORDER_COLOR_QUIRK:
 177         case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
 178         case PIPE_CAP_TGSI_VS_LAYER_VIEWPORT:
 179         case PIPE_CAP_MAX_TEXTURE_GATHER_COMPONENTS:
 180         case PIPE_CAP_TEXTURE_GATHER_SM5:
 181         case PIPE_CAP_TEXTURE_QUERY_LOD:
 182         case PIPE_CAP_FAKE_SW_MSAA:
 183         case PIPE_CAP_SAMPLE_SHADING:
 184         case PIPE_CAP_TEXTURE_GATHER_OFFSETS:
 185         case PIPE_CAP_DRAW_INDIRECT:
 186         case PIPE_CAP_TGSI_FS_FINE_DERIVATIVE:
 187         case PIPE_CAP_CONDITIONAL_RENDER_INVERTED:
 188         case PIPE_CAP_SAMPLER_VIEW_TARGET:
 189         case PIPE_CAP_VERTEXID_NOBASE:
 190         case PIPE_CAP_POLYGON_OFFSET_CLAMP:
 191         case PIPE_CAP_MULTISAMPLE_Z_RESOLVE:
 192         case PIPE_CAP_RESOURCE_FROM_USER_MEMORY:
 193         case PIPE_CAP_DEVICE_RESET_STATUS_QUERY:
 194         case PIPE_CAP_MAX_SHADER_PATCH_VARYINGS:
 195         case PIPE_CAP_TEXTURE_FLOAT_LINEAR:
 196         case PIPE_CAP_TEXTURE_HALF_FLOAT_LINEAR:
 197         case PIPE_CAP_DEPTH_BOUNDS_TEST:
 198             return 0;
 199
 200         /* SWTCL-only features. */
 201         case PIPE_CAP_PRIMITIVE_RESTART:
 202         case PIPE_CAP_USER_VERTEX_BUFFERS:
 203         case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 204             return !r300screen->caps.has_tcl;
 205
 206         /* HWTCL-only features / limitations. */
 207         case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 208         case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 209         case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 210             return r300screen->caps.has_tcl;
 211         case PIPE_CAP_TGSI_TEXCOORD:
 212             return 0;
 213
 214         /* Texturing. */
 215         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 216         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 217         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 218             /* 13 == 4096, 12 == 2048 */
 219             return is_r500 ? 13 : 12;
 220
 221         /* Render targets. */
 222         case PIPE_CAP_MAX_RENDER_TARGETS:
 223             return 4;
 224         case PIPE_CAP_ENDIANNESS:
 225             return PIPE_ENDIAN_LITTLE;
 226
 227         case PIPE_CAP_MAX_VIEWPORTS:
 228             return 1;
 229
 230         case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 231             return 2048;
 232
 233         case PIPE_CAP_VENDOR_ID:
 234                 return 0x1002;
 235         case PIPE_CAP_DEVICE_ID:
 236                 return r300screen->info.pci_id;
 237         case PIPE_CAP_ACCELERATED:
 238                 return 1;
 239         case PIPE_CAP_VIDEO_MEMORY:
 240                 return r300screen->info.vram_size >> 20;
 241         case PIPE_CAP_UMA:
 242                 return 0;
 243     }
 244     return 0;
 245 }
 246
 247 static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param)
 248 {
 249    struct r300_screen* r300screen = r300_screen(pscreen);
 250    boolean is_r400 = r300screen->caps.is_r400;
 251    boolean is_r500 = r300screen->caps.is_r500;
 252
 253    switch (shader) {
 254     case PIPE_SHADER_FRAGMENT:
 255         switch (param)
 256         {
 257         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 258             return is_r500 || is_r400 ? 512 : 96;
 259         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 260             return is_r500 || is_r400 ? 512 : 64;
 261         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 262             return is_r500 || is_r400 ? 512 : 32;
 263         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 264             return is_r500 ? 511 : 4;
 265         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 266             return is_r500 ? 64 : 0; /* Actually unlimited on r500. */
 267             /* Fragment shader limits. */
 268         case PIPE_SHADER_CAP_MAX_INPUTS:
 269             /* 2 colors + 8 texcoords are always supported
 270              * (minus fog and wpos).
 271              *
 272              * R500 has the ability to turn 3rd and 4th color into
 273              * additional texcoords but there is no two-sided color
 274              * selection then. However the facing bit can be used instead. */
 275             return 10;
 276         case PIPE_SHADER_CAP_MAX_OUTPUTS:
 277             return 4;
 278         case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 279             return (is_r500 ? 256 : 32) * sizeof(float[4]);
 280         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 281         case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
 282             return 1;
 283         case PIPE_SHADER_CAP_MAX_TEMPS:
 284             return is_r500 ? 128 : is_r400 ? 64 : 32;
 285         case PIPE_SHADER_CAP_MAX_PREDS:
 286             return 0; /* unused */
 287         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 288         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 289            return r300screen->caps.num_tex_units;
 290         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 291         case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 292         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 293         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 294         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 295         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 296         case PIPE_SHADER_CAP_SUBROUTINES:
 297         case PIPE_SHADER_CAP_INTEGERS:
 298         case PIPE_SHADER_CAP_DOUBLES:
 299         case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
 300         case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
 301         case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
 302             return 0;
 303         case PIPE_SHADER_CAP_PREFERRED_IR:
 304             return PIPE_SHADER_IR_TGSI;
 305         }
 306         break;
 307     case PIPE_SHADER_VERTEX:
 308         switch (param)
 309         {
 310         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 311         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 312         case PIPE_SHADER_CAP_SUBROUTINES:
 313             return 0;
 314         default:;
 315         }
 316
 317         if (!r300screen->caps.has_tcl) {
 318             return draw_get_shader_param(shader, param);
 319         }
 320
 321         switch (param)
 322         {
 323         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 324         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 325             return is_r500 ? 1024 : 256;
 326         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 327             return is_r500 ? 4 : 0; /* For loops; not sure about conditionals. */
 328         case PIPE_SHADER_CAP_MAX_INPUTS:
 329             return 16;
 330         case PIPE_SHADER_CAP_MAX_OUTPUTS:
 331             return 10;
 332         case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 333             return 256 * sizeof(float[4]);
 334         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 335             return 1;
 336         case PIPE_SHADER_CAP_MAX_TEMPS:
 337             return 32;
 338         case PIPE_SHADER_CAP_MAX_PREDS:
 339             return 0; /* unused */
 340         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 341         case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
 342             return 1;
 343         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 344         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 345         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 346         case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 347         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 348         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 349         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 350         case PIPE_SHADER_CAP_SUBROUTINES:
 351         case PIPE_SHADER_CAP_INTEGERS:
 352         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 353         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 354         case PIPE_SHADER_CAP_DOUBLES:
 355         case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
 356         case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
 357         case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
 358             return 0;
 359         case PIPE_SHADER_CAP_PREFERRED_IR:
 360             return PIPE_SHADER_IR_TGSI;
 361         }
 362         break;
 363     }
 364     return 0;
 365 }
 366
 367 static float r300_get_paramf(struct pipe_screen* pscreen,
 368                              enum pipe_capf param)
 369 {
 370     struct r300_screen* r300screen = r300_screen(pscreen);
 371
 372     switch (param) {
 373         case PIPE_CAPF_MAX_LINE_WIDTH:
 374         case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 375         case PIPE_CAPF_MAX_POINT_WIDTH:
 376         case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 377             /* The maximum dimensions of the colorbuffer are our practical
 378              * rendering limits. 2048 pixels should be enough for anybody. */
 379             if (r300screen->caps.is_r500) {
 380                 return 4096.0f;
 381             } else if (r300screen->caps.is_r400) {
 382                 return 4021.0f;
 383             } else {
 384                 return 2560.0f;
 385             }
 386         case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 387             return 16.0f;
 388         case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 389             return 16.0f;
 390         case PIPE_CAPF_GUARD_BAND_LEFT:
 391         case PIPE_CAPF_GUARD_BAND_TOP:
 392         case PIPE_CAPF_GUARD_BAND_RIGHT:
 393         case PIPE_CAPF_GUARD_BAND_BOTTOM:
 394             return 0.0f;
 395         default:
 396             debug_printf("r300: Warning: Unknown CAP %d in get_paramf.\n",
 397                          param);
 398             return 0.0f;
 399     }
 400 }
 401
 402 static int r300_get_video_param(struct pipe_screen *screen,
 403                                 enum pipe_video_profile profile,
 404                                 enum pipe_video_entrypoint entrypoint,
 405                                 enum pipe_video_cap param)
 406 {
 407    switch (param) {
 408       case PIPE_VIDEO_CAP_SUPPORTED:
 409          return vl_profile_supported(screen, profile, entrypoint);
 410       case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 411          return 0;
 412       case PIPE_VIDEO_CAP_MAX_WIDTH:
 413       case PIPE_VIDEO_CAP_MAX_HEIGHT:
 414          return vl_video_buffer_max_size(screen);
 415       case PIPE_VIDEO_CAP_PREFERED_FORMAT:
 416          return PIPE_FORMAT_NV12;
 417       case PIPE_VIDEO_CAP_PREFERS_INTERLACED:
 418          return false;
 419       case PIPE_VIDEO_CAP_SUPPORTS_INTERLACED:
 420          return false;
 421       case PIPE_VIDEO_CAP_SUPPORTS_PROGRESSIVE:
 422          return true;
 423       case PIPE_VIDEO_CAP_MAX_LEVEL:
 424          return vl_level_supported(screen, profile);
 425       default:
 426          return 0;
 427    }
 428 }
 429
 430 /**
 431  * Whether the format matches:
 432  *   PIPE_FORMAT_?10?10?10?2_UNORM
 433  */
 434 static inline boolean
 435 util_format_is_rgba1010102_variant(const struct util_format_description *desc)
 436 {
 437    static const unsigned size[4] = {10, 10, 10, 2};
 438    unsigned chan;
 439
 440    if (desc->block.width != 1 ||
 441        desc->block.height != 1 ||
 442        desc->block.bits != 32)
 443       return FALSE;
 444
 445    for (chan = 0; chan < 4; ++chan) {
 446       if(desc->channel[chan].type != UTIL_FORMAT_TYPE_UNSIGNED &&
 447          desc->channel[chan].type != UTIL_FORMAT_TYPE_VOID)
 448          return FALSE;
 449       if (desc->channel[chan].size != size[chan])
 450          return FALSE;
 451    }
 452
 453    return TRUE;
 454 }
 455
 456 static bool r300_is_blending_supported(struct r300_screen *rscreen,
 457                                        enum pipe_format format)
 458 {
 459     int c;
 460     const struct util_format_description *desc =
 461         util_format_description(format);
 462
 463     if (desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 464         return false;
 465
 466     c = util_format_get_first_non_void_channel(format);
 467
 468     /* RGBA16F */
 469     if (rscreen->caps.is_r500 &&
 470         desc->nr_channels == 4 &&
 471         desc->channel[c].size == 16 &&
 472         desc->channel[c].type == UTIL_FORMAT_TYPE_FLOAT)
 473         return true;
 474
 475     if (desc->channel[c].normalized &&
 476         desc->channel[c].type == UTIL_FORMAT_TYPE_UNSIGNED &&
 477         desc->channel[c].size >= 4 &&
 478         desc->channel[c].size <= 10) {
 479         /* RGB10_A2, RGBA8, RGB5_A1, RGBA4, RGB565 */
 480         if (desc->nr_channels >= 3)
 481             return true;
 482
 483         if (format == PIPE_FORMAT_R8G8_UNORM)
 484             return true;
 485
 486         /* R8, I8, L8, A8 */
 487         if (desc->nr_channels == 1)
 488             return true;
 489     }
 490
 491     return false;
 492 }
 493
 494 static boolean r300_is_format_supported(struct pipe_screen* screen,
 495                                         enum pipe_format format,
 496                                         enum pipe_texture_target target,
 497                                         unsigned sample_count,
 498                                         unsigned usage)
 499 {
 500     uint32_t retval = 0;
 501     boolean drm_2_8_0 = r300_screen(screen)->info.drm_minor >= 8;
 502     boolean is_r500 = r300_screen(screen)->caps.is_r500;
 503     boolean is_r400 = r300_screen(screen)->caps.is_r400;
 504     boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM ||
 505                               format == PIPE_FORMAT_R10G10B10X2_SNORM ||
 506                               format == PIPE_FORMAT_B10G10R10A2_UNORM ||
 507                               format == PIPE_FORMAT_B10G10R10X2_UNORM ||
 508                               format == PIPE_FORMAT_R10SG10SB10SA2U_NORM;
 509     boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM ||
 510                        format == PIPE_FORMAT_RGTC1_SNORM ||
 511                        format == PIPE_FORMAT_LATC1_UNORM ||
 512                        format == PIPE_FORMAT_LATC1_SNORM;
 513     boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM ||
 514                        format == PIPE_FORMAT_RGTC2_SNORM ||
 515                        format == PIPE_FORMAT_LATC2_UNORM ||
 516                        format == PIPE_FORMAT_LATC2_SNORM;
 517     boolean is_x16f_xy16f = format == PIPE_FORMAT_R16_FLOAT ||
 518                             format == PIPE_FORMAT_R16G16_FLOAT ||
 519                             format == PIPE_FORMAT_A16_FLOAT ||
 520                             format == PIPE_FORMAT_L16_FLOAT ||
 521                             format == PIPE_FORMAT_L16A16_FLOAT ||
 522                             format == PIPE_FORMAT_R16A16_FLOAT ||
 523                             format == PIPE_FORMAT_I16_FLOAT;
 524     boolean is_half_float = format == PIPE_FORMAT_R16_FLOAT ||
 525                             format == PIPE_FORMAT_R16G16_FLOAT ||
 526                             format == PIPE_FORMAT_R16G16B16_FLOAT ||
 527                             format == PIPE_FORMAT_R16G16B16A16_FLOAT ||
 528                             format == PIPE_FORMAT_R16G16B16X16_FLOAT;
 529     const struct util_format_description *desc;
 530
 531     if (!util_format_is_supported(format, usage))
 532        return FALSE;
 533
 534     /* Check multisampling support. */
 535     switch (sample_count) {
 536         case 0:
 537         case 1:
 538             break;
 539         case 2:
 540         case 4:
 541         case 6:
 542             /* We need DRM 2.8.0. */
 543             if (!drm_2_8_0) {
 544                 return FALSE;
 545             }
 546             /* No texturing and scanout. */
 547             if (usage & (PIPE_BIND_SAMPLER_VIEW |
 548                          PIPE_BIND_DISPLAY_TARGET |
 549                          PIPE_BIND_SCANOUT)) {
 550                 return FALSE;
 551             }
 552
 553             desc = util_format_description(format);
 554
 555             if (is_r500) {
 556                 /* Only allow depth/stencil, RGBA8, RGBA1010102, RGBA16F. */
 557                 if (!util_format_is_depth_or_stencil(format) &&
 558                     !util_format_is_rgba8_variant(desc) &&
 559                     !util_format_is_rgba1010102_variant(desc) &&
 560                     format != PIPE_FORMAT_R16G16B16A16_FLOAT &&
 561                     format != PIPE_FORMAT_R16G16B16X16_FLOAT) {
 562                     return FALSE;
 563                 }
 564             } else {
 565                 /* Only allow depth/stencil, RGBA8. */
 566                 if (!util_format_is_depth_or_stencil(format) &&
 567                     !util_format_is_rgba8_variant(desc)) {
 568                     return FALSE;
 569                 }
 570             }
 571             break;
 572         default:
 573             return FALSE;
 574     }
 575
 576     /* Check sampler format support. */
 577     if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
 578         /* these two are broken for an unknown reason */
 579         format != PIPE_FORMAT_R8G8B8X8_SNORM &&
 580         format != PIPE_FORMAT_R16G16B16X16_SNORM &&
 581         /* ATI1N is r5xx-only. */
 582         (is_r500 || !is_ati1n) &&
 583         /* ATI2N is supported on r4xx-r5xx. */
 584         (is_r400 || is_r500 || !is_ati2n) &&
 585         /* R16F and RG16F texture support was added in as late as DRM 2.8.0 */
 586         (drm_2_8_0 || !is_x16f_xy16f) &&
 587         r300_is_sampler_format_supported(format)) {
 588         retval |= PIPE_BIND_SAMPLER_VIEW;
 589     }
 590
 591     /* Check colorbuffer format support. */
 592     if ((usage & (PIPE_BIND_RENDER_TARGET |
 593                   PIPE_BIND_DISPLAY_TARGET |
 594                   PIPE_BIND_SCANOUT |
 595                   PIPE_BIND_SHARED |
 596                   PIPE_BIND_BLENDABLE)) &&
 597         /* 2101010 cannot be rendered to on non-r5xx. */
 598         (!is_color2101010 || (is_r500 && drm_2_8_0)) &&
 599         r300_is_colorbuffer_format_supported(format)) {
 600         retval |= usage &
 601             (PIPE_BIND_RENDER_TARGET |
 602              PIPE_BIND_DISPLAY_TARGET |
 603              PIPE_BIND_SCANOUT |
 604              PIPE_BIND_SHARED);
 605
 606         if (r300_is_blending_supported(r300_screen(screen), format)) {
 607             retval |= usage & PIPE_BIND_BLENDABLE;
 608         }
 609     }
 610
 611     /* Check depth-stencil format support. */
 612     if (usage & PIPE_BIND_DEPTH_STENCIL &&
 613         r300_is_zs_format_supported(format)) {
 614         retval |= PIPE_BIND_DEPTH_STENCIL;
 615     }
 616
 617     /* Check vertex buffer format support. */
 618     if (usage & PIPE_BIND_VERTEX_BUFFER) {
 619         if (r300_screen(screen)->caps.has_tcl) {
 620             /* Half float is supported on >= R400. */
 621             if ((is_r400 || is_r500 || !is_half_float) &&
 622                 r300_translate_vertex_data_type(format) != R300_INVALID_FORMAT) {
 623                 retval |= PIPE_BIND_VERTEX_BUFFER;
 624             }
 625         } else {
 626             /* SW TCL */
 627             if (!util_format_is_pure_integer(format)) {
 628                 retval |= PIPE_BIND_VERTEX_BUFFER;
 629             }
 630         }
 631     }
 632
 633     /* Transfers are always supported. */
 634     if (usage & PIPE_BIND_TRANSFER_READ)
 635         retval |= PIPE_BIND_TRANSFER_READ;
 636     if (usage & PIPE_BIND_TRANSFER_WRITE)
 637         retval |= PIPE_BIND_TRANSFER_WRITE;
 638
 639     return retval == usage;
 640 }
 641
 642 static void r300_destroy_screen(struct pipe_screen* pscreen)
 643 {
 644     struct r300_screen* r300screen = r300_screen(pscreen);
 645     struct radeon_winsys *rws = radeon_winsys(pscreen);
 646
 647     if (rws && !rws->unref(rws))
 648       return;
 649
 650     pipe_mutex_destroy(r300screen->cmask_mutex);
 651
 652     if (rws)
 653       rws->destroy(rws);
 654
 655     FREE(r300screen);
 656 }
 657
 658 static void r300_fence_reference(struct pipe_screen *screen,
 659                                  struct pipe_fence_handle **ptr,
 660                                  struct pipe_fence_handle *fence)
 661 {
 662     struct radeon_winsys *rws = r300_screen(screen)->rws;
 663
 664     rws->fence_reference(ptr, fence);
 665 }
 666
 667 static boolean r300_fence_finish(struct pipe_screen *screen,
 668                                  struct pipe_fence_handle *fence,
 669                                  uint64_t timeout)
 670 {
 671     struct radeon_winsys *rws = r300_screen(screen)->rws;
 672
 673     return rws->fence_wait(rws, fence, timeout);
 674 }
 675
 676 struct pipe_screen* r300_screen_create(struct radeon_winsys *rws)
 677 {
 678     struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
 679
 680     if (!r300screen) {
 681         FREE(r300screen);
 682         return NULL;
 683     }
 684
 685     rws->query_info(rws, &r300screen->info);
 686
 687     r300_init_debug(r300screen);
 688     r300_parse_chipset(r300screen->info.pci_id, &r300screen->caps);
 689
 690     if (SCREEN_DBG_ON(r300screen, DBG_NO_ZMASK))
 691         r300screen->caps.zmask_ram = 0;
 692     if (SCREEN_DBG_ON(r300screen, DBG_NO_HIZ))
 693         r300screen->caps.hiz_ram = 0;
 694
 695     if (r300screen->info.drm_minor < 8)
 696         r300screen->caps.has_us_format = FALSE;
 697
 698     r300screen->rws = rws;
 699     r300screen->screen.destroy = r300_destroy_screen;
 700     r300screen->screen.get_name = r300_get_name;
 701     r300screen->screen.get_vendor = r300_get_vendor;
 702     r300screen->screen.get_device_vendor = r300_get_device_vendor;
 703     r300screen->screen.get_param = r300_get_param;
 704     r300screen->screen.get_shader_param = r300_get_shader_param;
 705     r300screen->screen.get_paramf = r300_get_paramf;
 706     r300screen->screen.get_video_param = r300_get_video_param;
 707     r300screen->screen.is_format_supported = r300_is_format_supported;
 708     r300screen->screen.is_video_format_supported = vl_video_buffer_is_format_supported;
 709     r300screen->screen.context_create = r300_create_context;
 710     r300screen->screen.fence_reference = r300_fence_reference;
 711     r300screen->screen.fence_finish = r300_fence_finish;
 712
 713     r300_init_screen_resource_functions(r300screen);
 714
 715     util_format_s3tc_init();
 716     pipe_mutex_init(r300screen->cmask_mutex);
 717
 718     return &r300screen->screen;
 719 }