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             return 0;
 196
 197         /* SWTCL-only features. */
 198         case PIPE_CAP_PRIMITIVE_RESTART:
 199         case PIPE_CAP_USER_VERTEX_BUFFERS:
 200         case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 201             return !r300screen->caps.has_tcl;
 202
 203         /* HWTCL-only features / limitations. */
 204         case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 205         case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 206         case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 207             return r300screen->caps.has_tcl;
 208         case PIPE_CAP_TGSI_TEXCOORD:
 209             return 0;
 210
 211         /* Texturing. */
 212         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 213         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 214         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 215             /* 13 == 4096, 12 == 2048 */
 216             return is_r500 ? 13 : 12;
 217
 218         /* Render targets. */
 219         case PIPE_CAP_MAX_RENDER_TARGETS:
 220             return 4;
 221         case PIPE_CAP_ENDIANNESS:
 222             return PIPE_ENDIAN_LITTLE;
 223
 224         case PIPE_CAP_MAX_VIEWPORTS:
 225             return 1;
 226
 227         case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 228             return 2048;
 229
 230         case PIPE_CAP_VENDOR_ID:
 231                 return 0x1002;
 232         case PIPE_CAP_DEVICE_ID:
 233                 return r300screen->info.pci_id;
 234         case PIPE_CAP_ACCELERATED:
 235                 return 1;
 236         case PIPE_CAP_VIDEO_MEMORY:
 237                 return r300screen->info.vram_size >> 20;
 238         case PIPE_CAP_UMA:
 239                 return 0;
 240     }
 241     return 0;
 242 }
 243
 244 static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param)
 245 {
 246    struct r300_screen* r300screen = r300_screen(pscreen);
 247    boolean is_r400 = r300screen->caps.is_r400;
 248    boolean is_r500 = r300screen->caps.is_r500;
 249
 250    switch (shader) {
 251     case PIPE_SHADER_FRAGMENT:
 252         switch (param)
 253         {
 254         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 255             return is_r500 || is_r400 ? 512 : 96;
 256         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 257             return is_r500 || is_r400 ? 512 : 64;
 258         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 259             return is_r500 || is_r400 ? 512 : 32;
 260         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 261             return is_r500 ? 511 : 4;
 262         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 263             return is_r500 ? 64 : 0; /* Actually unlimited on r500. */
 264             /* Fragment shader limits. */
 265         case PIPE_SHADER_CAP_MAX_INPUTS:
 266             /* 2 colors + 8 texcoords are always supported
 267              * (minus fog and wpos).
 268              *
 269              * R500 has the ability to turn 3rd and 4th color into
 270              * additional texcoords but there is no two-sided color
 271              * selection then. However the facing bit can be used instead. */
 272             return 10;
 273         case PIPE_SHADER_CAP_MAX_OUTPUTS:
 274             return 4;
 275         case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 276             return (is_r500 ? 256 : 32) * sizeof(float[4]);
 277         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 278         case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
 279             return 1;
 280         case PIPE_SHADER_CAP_MAX_TEMPS:
 281             return is_r500 ? 128 : is_r400 ? 64 : 32;
 282         case PIPE_SHADER_CAP_MAX_PREDS:
 283             return 0; /* unused */
 284         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 285         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 286            return r300screen->caps.num_tex_units;
 287         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 288         case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 289         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 290         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 291         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 292         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 293         case PIPE_SHADER_CAP_SUBROUTINES:
 294         case PIPE_SHADER_CAP_INTEGERS:
 295         case PIPE_SHADER_CAP_DOUBLES:
 296         case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
 297         case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
 298         case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
 299             return 0;
 300         case PIPE_SHADER_CAP_PREFERRED_IR:
 301             return PIPE_SHADER_IR_TGSI;
 302         }
 303         break;
 304     case PIPE_SHADER_VERTEX:
 305         switch (param)
 306         {
 307         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 308         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 309         case PIPE_SHADER_CAP_SUBROUTINES:
 310             return 0;
 311         default:;
 312         }
 313
 314         if (!r300screen->caps.has_tcl) {
 315             return draw_get_shader_param(shader, param);
 316         }
 317
 318         switch (param)
 319         {
 320         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 321         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 322             return is_r500 ? 1024 : 256;
 323         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 324             return is_r500 ? 4 : 0; /* For loops; not sure about conditionals. */
 325         case PIPE_SHADER_CAP_MAX_INPUTS:
 326             return 16;
 327         case PIPE_SHADER_CAP_MAX_OUTPUTS:
 328             return 10;
 329         case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 330             return 256 * sizeof(float[4]);
 331         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 332             return 1;
 333         case PIPE_SHADER_CAP_MAX_TEMPS:
 334             return 32;
 335         case PIPE_SHADER_CAP_MAX_PREDS:
 336             return 0; /* unused */
 337         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 338         case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
 339             return 1;
 340         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 341         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 342         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 343         case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 344         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 345         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 346         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 347         case PIPE_SHADER_CAP_SUBROUTINES:
 348         case PIPE_SHADER_CAP_INTEGERS:
 349         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 350         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 351         case PIPE_SHADER_CAP_DOUBLES:
 352         case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
 353         case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
 354         case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
 355             return 0;
 356         case PIPE_SHADER_CAP_PREFERRED_IR:
 357             return PIPE_SHADER_IR_TGSI;
 358         }
 359         break;
 360     }
 361     return 0;
 362 }
 363
 364 static float r300_get_paramf(struct pipe_screen* pscreen,
 365                              enum pipe_capf param)
 366 {
 367     struct r300_screen* r300screen = r300_screen(pscreen);
 368
 369     switch (param) {
 370         case PIPE_CAPF_MAX_LINE_WIDTH:
 371         case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 372         case PIPE_CAPF_MAX_POINT_WIDTH:
 373         case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 374             /* The maximum dimensions of the colorbuffer are our practical
 375              * rendering limits. 2048 pixels should be enough for anybody. */
 376             if (r300screen->caps.is_r500) {
 377                 return 4096.0f;
 378             } else if (r300screen->caps.is_r400) {
 379                 return 4021.0f;
 380             } else {
 381                 return 2560.0f;
 382             }
 383         case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 384             return 16.0f;
 385         case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 386             return 16.0f;
 387         case PIPE_CAPF_GUARD_BAND_LEFT:
 388         case PIPE_CAPF_GUARD_BAND_TOP:
 389         case PIPE_CAPF_GUARD_BAND_RIGHT:
 390         case PIPE_CAPF_GUARD_BAND_BOTTOM:
 391             return 0.0f;
 392         default:
 393             debug_printf("r300: Warning: Unknown CAP %d in get_paramf.\n",
 394                          param);
 395             return 0.0f;
 396     }
 397 }
 398
 399 static int r300_get_video_param(struct pipe_screen *screen,
 400                                 enum pipe_video_profile profile,
 401                                 enum pipe_video_entrypoint entrypoint,
 402                                 enum pipe_video_cap param)
 403 {
 404    switch (param) {
 405       case PIPE_VIDEO_CAP_SUPPORTED:
 406          return vl_profile_supported(screen, profile, entrypoint);
 407       case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 408          return 0;
 409       case PIPE_VIDEO_CAP_MAX_WIDTH:
 410       case PIPE_VIDEO_CAP_MAX_HEIGHT:
 411          return vl_video_buffer_max_size(screen);
 412       case PIPE_VIDEO_CAP_PREFERED_FORMAT:
 413          return PIPE_FORMAT_NV12;
 414       case PIPE_VIDEO_CAP_PREFERS_INTERLACED:
 415          return false;
 416       case PIPE_VIDEO_CAP_SUPPORTS_INTERLACED:
 417          return false;
 418       case PIPE_VIDEO_CAP_SUPPORTS_PROGRESSIVE:
 419          return true;
 420       case PIPE_VIDEO_CAP_MAX_LEVEL:
 421          return vl_level_supported(screen, profile);
 422       default:
 423          return 0;
 424    }
 425 }
 426
 427 /**
 428  * Whether the format matches:
 429  *   PIPE_FORMAT_?10?10?10?2_UNORM
 430  */
 431 static INLINE boolean
 432 util_format_is_rgba1010102_variant(const struct util_format_description *desc)
 433 {
 434    static const unsigned size[4] = {10, 10, 10, 2};
 435    unsigned chan;
 436
 437    if (desc->block.width != 1 ||
 438        desc->block.height != 1 ||
 439        desc->block.bits != 32)
 440       return FALSE;
 441
 442    for (chan = 0; chan < 4; ++chan) {
 443       if(desc->channel[chan].type != UTIL_FORMAT_TYPE_UNSIGNED &&
 444          desc->channel[chan].type != UTIL_FORMAT_TYPE_VOID)
 445          return FALSE;
 446       if (desc->channel[chan].size != size[chan])
 447          return FALSE;
 448    }
 449
 450    return TRUE;
 451 }
 452
 453 static bool r300_is_blending_supported(struct r300_screen *rscreen,
 454                                        enum pipe_format format)
 455 {
 456     int c;
 457     const struct util_format_description *desc =
 458         util_format_description(format);
 459
 460     if (desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 461         return false;
 462
 463     c = util_format_get_first_non_void_channel(format);
 464
 465     /* RGBA16F */
 466     if (rscreen->caps.is_r500 &&
 467         desc->nr_channels == 4 &&
 468         desc->channel[c].size == 16 &&
 469         desc->channel[c].type == UTIL_FORMAT_TYPE_FLOAT)
 470         return true;
 471
 472     if (desc->channel[c].normalized &&
 473         desc->channel[c].type == UTIL_FORMAT_TYPE_UNSIGNED &&
 474         desc->channel[c].size >= 4 &&
 475         desc->channel[c].size <= 10) {
 476         /* RGB10_A2, RGBA8, RGB5_A1, RGBA4, RGB565 */
 477         if (desc->nr_channels >= 3)
 478             return true;
 479
 480         if (format == PIPE_FORMAT_R8G8_UNORM)
 481             return true;
 482
 483         /* R8, I8, L8, A8 */
 484         if (desc->nr_channels == 1)
 485             return true;
 486     }
 487
 488     return false;
 489 }
 490
 491 static boolean r300_is_format_supported(struct pipe_screen* screen,
 492                                         enum pipe_format format,
 493                                         enum pipe_texture_target target,
 494                                         unsigned sample_count,
 495                                         unsigned usage)
 496 {
 497     uint32_t retval = 0;
 498     boolean drm_2_8_0 = r300_screen(screen)->info.drm_minor >= 8;
 499     boolean is_r500 = r300_screen(screen)->caps.is_r500;
 500     boolean is_r400 = r300_screen(screen)->caps.is_r400;
 501     boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM ||
 502                               format == PIPE_FORMAT_R10G10B10X2_SNORM ||
 503                               format == PIPE_FORMAT_B10G10R10A2_UNORM ||
 504                               format == PIPE_FORMAT_B10G10R10X2_UNORM ||
 505                               format == PIPE_FORMAT_R10SG10SB10SA2U_NORM;
 506     boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM ||
 507                        format == PIPE_FORMAT_RGTC1_SNORM ||
 508                        format == PIPE_FORMAT_LATC1_UNORM ||
 509                        format == PIPE_FORMAT_LATC1_SNORM;
 510     boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM ||
 511                        format == PIPE_FORMAT_RGTC2_SNORM ||
 512                        format == PIPE_FORMAT_LATC2_UNORM ||
 513                        format == PIPE_FORMAT_LATC2_SNORM;
 514     boolean is_x16f_xy16f = format == PIPE_FORMAT_R16_FLOAT ||
 515                             format == PIPE_FORMAT_R16G16_FLOAT ||
 516                             format == PIPE_FORMAT_A16_FLOAT ||
 517                             format == PIPE_FORMAT_L16_FLOAT ||
 518                             format == PIPE_FORMAT_L16A16_FLOAT ||
 519                             format == PIPE_FORMAT_R16A16_FLOAT ||
 520                             format == PIPE_FORMAT_I16_FLOAT;
 521     boolean is_half_float = format == PIPE_FORMAT_R16_FLOAT ||
 522                             format == PIPE_FORMAT_R16G16_FLOAT ||
 523                             format == PIPE_FORMAT_R16G16B16_FLOAT ||
 524                             format == PIPE_FORMAT_R16G16B16A16_FLOAT ||
 525                             format == PIPE_FORMAT_R16G16B16X16_FLOAT;
 526     const struct util_format_description *desc;
 527
 528     if (!util_format_is_supported(format, usage))
 529        return FALSE;
 530
 531     /* Check multisampling support. */
 532     switch (sample_count) {
 533         case 0:
 534         case 1:
 535             break;
 536         case 2:
 537         case 4:
 538         case 6:
 539             /* We need DRM 2.8.0. */
 540             if (!drm_2_8_0) {
 541                 return FALSE;
 542             }
 543             /* No texturing and scanout. */
 544             if (usage & (PIPE_BIND_SAMPLER_VIEW |
 545                          PIPE_BIND_DISPLAY_TARGET |
 546                          PIPE_BIND_SCANOUT)) {
 547                 return FALSE;
 548             }
 549
 550             desc = util_format_description(format);
 551
 552             if (is_r500) {
 553                 /* Only allow depth/stencil, RGBA8, RGBA1010102, RGBA16F. */
 554                 if (!util_format_is_depth_or_stencil(format) &&
 555                     !util_format_is_rgba8_variant(desc) &&
 556                     !util_format_is_rgba1010102_variant(desc) &&
 557                     format != PIPE_FORMAT_R16G16B16A16_FLOAT &&
 558                     format != PIPE_FORMAT_R16G16B16X16_FLOAT) {
 559                     return FALSE;
 560                 }
 561             } else {
 562                 /* Only allow depth/stencil, RGBA8. */
 563                 if (!util_format_is_depth_or_stencil(format) &&
 564                     !util_format_is_rgba8_variant(desc)) {
 565                     return FALSE;
 566                 }
 567             }
 568             break;
 569         default:
 570             return FALSE;
 571     }
 572
 573     /* Check sampler format support. */
 574     if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
 575         /* these two are broken for an unknown reason */
 576         format != PIPE_FORMAT_R8G8B8X8_SNORM &&
 577         format != PIPE_FORMAT_R16G16B16X16_SNORM &&
 578         /* ATI1N is r5xx-only. */
 579         (is_r500 || !is_ati1n) &&
 580         /* ATI2N is supported on r4xx-r5xx. */
 581         (is_r400 || is_r500 || !is_ati2n) &&
 582         /* R16F and RG16F texture support was added in as late as DRM 2.8.0 */
 583         (drm_2_8_0 || !is_x16f_xy16f) &&
 584         r300_is_sampler_format_supported(format)) {
 585         retval |= PIPE_BIND_SAMPLER_VIEW;
 586     }
 587
 588     /* Check colorbuffer format support. */
 589     if ((usage & (PIPE_BIND_RENDER_TARGET |
 590                   PIPE_BIND_DISPLAY_TARGET |
 591                   PIPE_BIND_SCANOUT |
 592                   PIPE_BIND_SHARED |
 593                   PIPE_BIND_BLENDABLE)) &&
 594         /* 2101010 cannot be rendered to on non-r5xx. */
 595         (!is_color2101010 || (is_r500 && drm_2_8_0)) &&
 596         r300_is_colorbuffer_format_supported(format)) {
 597         retval |= usage &
 598             (PIPE_BIND_RENDER_TARGET |
 599              PIPE_BIND_DISPLAY_TARGET |
 600              PIPE_BIND_SCANOUT |
 601              PIPE_BIND_SHARED);
 602
 603         if (r300_is_blending_supported(r300_screen(screen), format)) {
 604             retval |= usage & PIPE_BIND_BLENDABLE;
 605         }
 606     }
 607
 608     /* Check depth-stencil format support. */
 609     if (usage & PIPE_BIND_DEPTH_STENCIL &&
 610         r300_is_zs_format_supported(format)) {
 611         retval |= PIPE_BIND_DEPTH_STENCIL;
 612     }
 613
 614     /* Check vertex buffer format support. */
 615     if (usage & PIPE_BIND_VERTEX_BUFFER) {
 616         if (r300_screen(screen)->caps.has_tcl) {
 617             /* Half float is supported on >= R400. */
 618             if ((is_r400 || is_r500 || !is_half_float) &&
 619                 r300_translate_vertex_data_type(format) != R300_INVALID_FORMAT) {
 620                 retval |= PIPE_BIND_VERTEX_BUFFER;
 621             }
 622         } else {
 623             /* SW TCL */
 624             if (!util_format_is_pure_integer(format)) {
 625                 retval |= PIPE_BIND_VERTEX_BUFFER;
 626             }
 627         }
 628     }
 629
 630     /* Transfers are always supported. */
 631     if (usage & PIPE_BIND_TRANSFER_READ)
 632         retval |= PIPE_BIND_TRANSFER_READ;
 633     if (usage & PIPE_BIND_TRANSFER_WRITE)
 634         retval |= PIPE_BIND_TRANSFER_WRITE;
 635
 636     return retval == usage;
 637 }
 638
 639 static void r300_destroy_screen(struct pipe_screen* pscreen)
 640 {
 641     struct r300_screen* r300screen = r300_screen(pscreen);
 642     struct radeon_winsys *rws = radeon_winsys(pscreen);
 643
 644     if (rws && !rws->unref(rws))
 645       return;
 646
 647     pipe_mutex_destroy(r300screen->cmask_mutex);
 648
 649     if (rws)
 650       rws->destroy(rws);
 651
 652     FREE(r300screen);
 653 }
 654
 655 static void r300_fence_reference(struct pipe_screen *screen,
 656                                  struct pipe_fence_handle **ptr,
 657                                  struct pipe_fence_handle *fence)
 658 {
 659     struct radeon_winsys *rws = r300_screen(screen)->rws;
 660
 661     rws->fence_reference(ptr, fence);
 662 }
 663
 664 static boolean r300_fence_finish(struct pipe_screen *screen,
 665                                  struct pipe_fence_handle *fence,
 666                                  uint64_t timeout)
 667 {
 668     struct radeon_winsys *rws = r300_screen(screen)->rws;
 669
 670     return rws->fence_wait(rws, fence, timeout);
 671 }
 672
 673 struct pipe_screen* r300_screen_create(struct radeon_winsys *rws)
 674 {
 675     struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
 676
 677     if (!r300screen) {
 678         FREE(r300screen);
 679         return NULL;
 680     }
 681
 682     rws->query_info(rws, &r300screen->info);
 683
 684     r300_init_debug(r300screen);
 685     r300_parse_chipset(r300screen->info.pci_id, &r300screen->caps);
 686
 687     if (SCREEN_DBG_ON(r300screen, DBG_NO_ZMASK))
 688         r300screen->caps.zmask_ram = 0;
 689     if (SCREEN_DBG_ON(r300screen, DBG_NO_HIZ))
 690         r300screen->caps.hiz_ram = 0;
 691
 692     if (r300screen->info.drm_minor < 8)
 693         r300screen->caps.has_us_format = FALSE;
 694
 695     r300screen->rws = rws;
 696     r300screen->screen.destroy = r300_destroy_screen;
 697     r300screen->screen.get_name = r300_get_name;
 698     r300screen->screen.get_vendor = r300_get_vendor;
 699     r300screen->screen.get_device_vendor = r300_get_device_vendor;
 700     r300screen->screen.get_param = r300_get_param;
 701     r300screen->screen.get_shader_param = r300_get_shader_param;
 702     r300screen->screen.get_paramf = r300_get_paramf;
 703     r300screen->screen.get_video_param = r300_get_video_param;
 704     r300screen->screen.is_format_supported = r300_is_format_supported;
 705     r300screen->screen.is_video_format_supported = vl_video_buffer_is_format_supported;
 706     r300screen->screen.context_create = r300_create_context;
 707     r300screen->screen.fence_reference = r300_fence_reference;
 708     r300screen->screen.fence_finish = r300_fence_finish;
 709
 710     r300_init_screen_resource_functions(r300screen);
 711
 712     util_format_s3tc_init();
 713     pipe_mutex_init(r300screen->cmask_mutex);
 714
 715     return &r300screen->screen;
 716 }