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             return 0;
 195
 196         /* SWTCL-only features. */
 197         case PIPE_CAP_PRIMITIVE_RESTART:
 198         case PIPE_CAP_USER_VERTEX_BUFFERS:
 199         case PIPE_CAP_TGSI_VS_WINDOW_SPACE_POSITION:
 200             return !r300screen->caps.has_tcl;
 201
 202         /* HWTCL-only features / limitations. */
 203         case PIPE_CAP_VERTEX_BUFFER_OFFSET_4BYTE_ALIGNED_ONLY:
 204         case PIPE_CAP_VERTEX_BUFFER_STRIDE_4BYTE_ALIGNED_ONLY:
 205         case PIPE_CAP_VERTEX_ELEMENT_SRC_OFFSET_4BYTE_ALIGNED_ONLY:
 206             return r300screen->caps.has_tcl;
 207         case PIPE_CAP_TGSI_TEXCOORD:
 208             return 0;
 209
 210         /* Texturing. */
 211         case PIPE_CAP_MAX_TEXTURE_2D_LEVELS:
 212         case PIPE_CAP_MAX_TEXTURE_3D_LEVELS:
 213         case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS:
 214             /* 13 == 4096, 12 == 2048 */
 215             return is_r500 ? 13 : 12;
 216
 217         /* Render targets. */
 218         case PIPE_CAP_MAX_RENDER_TARGETS:
 219             return 4;
 220         case PIPE_CAP_ENDIANNESS:
 221             return PIPE_ENDIAN_LITTLE;
 222
 223         case PIPE_CAP_MAX_VIEWPORTS:
 224             return 1;
 225
 226         case PIPE_CAP_MAX_VERTEX_ATTRIB_STRIDE:
 227             return 2048;
 228
 229         case PIPE_CAP_VENDOR_ID:
 230                 return 0x1002;
 231         case PIPE_CAP_DEVICE_ID:
 232                 return r300screen->info.pci_id;
 233         case PIPE_CAP_ACCELERATED:
 234                 return 1;
 235         case PIPE_CAP_VIDEO_MEMORY:
 236                 return r300screen->info.vram_size >> 20;
 237         case PIPE_CAP_UMA:
 238                 return 0;
 239     }
 240     return 0;
 241 }
 242
 243 static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param)
 244 {
 245    struct r300_screen* r300screen = r300_screen(pscreen);
 246    boolean is_r400 = r300screen->caps.is_r400;
 247    boolean is_r500 = r300screen->caps.is_r500;
 248
 249    switch (shader) {
 250     case PIPE_SHADER_FRAGMENT:
 251         switch (param)
 252         {
 253         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 254             return is_r500 || is_r400 ? 512 : 96;
 255         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 256             return is_r500 || is_r400 ? 512 : 64;
 257         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 258             return is_r500 || is_r400 ? 512 : 32;
 259         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 260             return is_r500 ? 511 : 4;
 261         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 262             return is_r500 ? 64 : 0; /* Actually unlimited on r500. */
 263             /* Fragment shader limits. */
 264         case PIPE_SHADER_CAP_MAX_INPUTS:
 265             /* 2 colors + 8 texcoords are always supported
 266              * (minus fog and wpos).
 267              *
 268              * R500 has the ability to turn 3rd and 4th color into
 269              * additional texcoords but there is no two-sided color
 270              * selection then. However the facing bit can be used instead. */
 271             return 10;
 272         case PIPE_SHADER_CAP_MAX_OUTPUTS:
 273             return 4;
 274         case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 275             return (is_r500 ? 256 : 32) * sizeof(float[4]);
 276         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 277         case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
 278             return 1;
 279         case PIPE_SHADER_CAP_MAX_TEMPS:
 280             return is_r500 ? 128 : is_r400 ? 64 : 32;
 281         case PIPE_SHADER_CAP_MAX_PREDS:
 282             return 0; /* unused */
 283         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 284         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 285            return r300screen->caps.num_tex_units;
 286         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 287         case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 288         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 289         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 290         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 291         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 292         case PIPE_SHADER_CAP_SUBROUTINES:
 293         case PIPE_SHADER_CAP_INTEGERS:
 294         case PIPE_SHADER_CAP_DOUBLES:
 295         case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
 296         case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
 297         case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
 298             return 0;
 299         case PIPE_SHADER_CAP_PREFERRED_IR:
 300             return PIPE_SHADER_IR_TGSI;
 301         }
 302         break;
 303     case PIPE_SHADER_VERTEX:
 304         switch (param)
 305         {
 306         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 307         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 308         case PIPE_SHADER_CAP_SUBROUTINES:
 309             return 0;
 310         default:;
 311         }
 312
 313         if (!r300screen->caps.has_tcl) {
 314             return draw_get_shader_param(shader, param);
 315         }
 316
 317         switch (param)
 318         {
 319         case PIPE_SHADER_CAP_MAX_INSTRUCTIONS:
 320         case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS:
 321             return is_r500 ? 1024 : 256;
 322         case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH:
 323             return is_r500 ? 4 : 0; /* For loops; not sure about conditionals. */
 324         case PIPE_SHADER_CAP_MAX_INPUTS:
 325             return 16;
 326         case PIPE_SHADER_CAP_MAX_OUTPUTS:
 327             return 10;
 328         case PIPE_SHADER_CAP_MAX_CONST_BUFFER_SIZE:
 329             return 256 * sizeof(float[4]);
 330         case PIPE_SHADER_CAP_MAX_CONST_BUFFERS:
 331             return 1;
 332         case PIPE_SHADER_CAP_MAX_TEMPS:
 333             return 32;
 334         case PIPE_SHADER_CAP_MAX_PREDS:
 335             return 0; /* unused */
 336         case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR:
 337         case PIPE_SHADER_CAP_TGSI_ANY_INOUT_DECL_RANGE:
 338             return 1;
 339         case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS:
 340         case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS:
 341         case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED:
 342         case PIPE_SHADER_CAP_TGSI_SQRT_SUPPORTED:
 343         case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR:
 344         case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR:
 345         case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR:
 346         case PIPE_SHADER_CAP_SUBROUTINES:
 347         case PIPE_SHADER_CAP_INTEGERS:
 348         case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS:
 349         case PIPE_SHADER_CAP_MAX_SAMPLER_VIEWS:
 350         case PIPE_SHADER_CAP_DOUBLES:
 351         case PIPE_SHADER_CAP_TGSI_DROUND_SUPPORTED:
 352         case PIPE_SHADER_CAP_TGSI_DFRACEXP_DLDEXP_SUPPORTED:
 353         case PIPE_SHADER_CAP_TGSI_FMA_SUPPORTED:
 354             return 0;
 355         case PIPE_SHADER_CAP_PREFERRED_IR:
 356             return PIPE_SHADER_IR_TGSI;
 357         }
 358         break;
 359     }
 360     return 0;
 361 }
 362
 363 static float r300_get_paramf(struct pipe_screen* pscreen,
 364                              enum pipe_capf param)
 365 {
 366     struct r300_screen* r300screen = r300_screen(pscreen);
 367
 368     switch (param) {
 369         case PIPE_CAPF_MAX_LINE_WIDTH:
 370         case PIPE_CAPF_MAX_LINE_WIDTH_AA:
 371         case PIPE_CAPF_MAX_POINT_WIDTH:
 372         case PIPE_CAPF_MAX_POINT_WIDTH_AA:
 373             /* The maximum dimensions of the colorbuffer are our practical
 374              * rendering limits. 2048 pixels should be enough for anybody. */
 375             if (r300screen->caps.is_r500) {
 376                 return 4096.0f;
 377             } else if (r300screen->caps.is_r400) {
 378                 return 4021.0f;
 379             } else {
 380                 return 2560.0f;
 381             }
 382         case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY:
 383             return 16.0f;
 384         case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS:
 385             return 16.0f;
 386         case PIPE_CAPF_GUARD_BAND_LEFT:
 387         case PIPE_CAPF_GUARD_BAND_TOP:
 388         case PIPE_CAPF_GUARD_BAND_RIGHT:
 389         case PIPE_CAPF_GUARD_BAND_BOTTOM:
 390             return 0.0f;
 391         default:
 392             debug_printf("r300: Warning: Unknown CAP %d in get_paramf.\n",
 393                          param);
 394             return 0.0f;
 395     }
 396 }
 397
 398 static int r300_get_video_param(struct pipe_screen *screen,
 399                                 enum pipe_video_profile profile,
 400                                 enum pipe_video_entrypoint entrypoint,
 401                                 enum pipe_video_cap param)
 402 {
 403    switch (param) {
 404       case PIPE_VIDEO_CAP_SUPPORTED:
 405          return vl_profile_supported(screen, profile, entrypoint);
 406       case PIPE_VIDEO_CAP_NPOT_TEXTURES:
 407          return 0;
 408       case PIPE_VIDEO_CAP_MAX_WIDTH:
 409       case PIPE_VIDEO_CAP_MAX_HEIGHT:
 410          return vl_video_buffer_max_size(screen);
 411       case PIPE_VIDEO_CAP_PREFERED_FORMAT:
 412          return PIPE_FORMAT_NV12;
 413       case PIPE_VIDEO_CAP_PREFERS_INTERLACED:
 414          return false;
 415       case PIPE_VIDEO_CAP_SUPPORTS_INTERLACED:
 416          return false;
 417       case PIPE_VIDEO_CAP_SUPPORTS_PROGRESSIVE:
 418          return true;
 419       case PIPE_VIDEO_CAP_MAX_LEVEL:
 420          return vl_level_supported(screen, profile);
 421       default:
 422          return 0;
 423    }
 424 }
 425
 426 /**
 427  * Whether the format matches:
 428  *   PIPE_FORMAT_?10?10?10?2_UNORM
 429  */
 430 static INLINE boolean
 431 util_format_is_rgba1010102_variant(const struct util_format_description *desc)
 432 {
 433    static const unsigned size[4] = {10, 10, 10, 2};
 434    unsigned chan;
 435
 436    if (desc->block.width != 1 ||
 437        desc->block.height != 1 ||
 438        desc->block.bits != 32)
 439       return FALSE;
 440
 441    for (chan = 0; chan < 4; ++chan) {
 442       if(desc->channel[chan].type != UTIL_FORMAT_TYPE_UNSIGNED &&
 443          desc->channel[chan].type != UTIL_FORMAT_TYPE_VOID)
 444          return FALSE;
 445       if (desc->channel[chan].size != size[chan])
 446          return FALSE;
 447    }
 448
 449    return TRUE;
 450 }
 451
 452 static bool r300_is_blending_supported(struct r300_screen *rscreen,
 453                                        enum pipe_format format)
 454 {
 455     int c;
 456     const struct util_format_description *desc =
 457         util_format_description(format);
 458
 459     if (desc->layout != UTIL_FORMAT_LAYOUT_PLAIN)
 460         return false;
 461
 462     c = util_format_get_first_non_void_channel(format);
 463
 464     /* RGBA16F */
 465     if (rscreen->caps.is_r500 &&
 466         desc->nr_channels == 4 &&
 467         desc->channel[c].size == 16 &&
 468         desc->channel[c].type == UTIL_FORMAT_TYPE_FLOAT)
 469         return true;
 470
 471     if (desc->channel[c].normalized &&
 472         desc->channel[c].type == UTIL_FORMAT_TYPE_UNSIGNED &&
 473         desc->channel[c].size >= 4 &&
 474         desc->channel[c].size <= 10) {
 475         /* RGB10_A2, RGBA8, RGB5_A1, RGBA4, RGB565 */
 476         if (desc->nr_channels >= 3)
 477             return true;
 478
 479         if (format == PIPE_FORMAT_R8G8_UNORM)
 480             return true;
 481
 482         /* R8, I8, L8, A8 */
 483         if (desc->nr_channels == 1)
 484             return true;
 485     }
 486
 487     return false;
 488 }
 489
 490 static boolean r300_is_format_supported(struct pipe_screen* screen,
 491                                         enum pipe_format format,
 492                                         enum pipe_texture_target target,
 493                                         unsigned sample_count,
 494                                         unsigned usage)
 495 {
 496     uint32_t retval = 0;
 497     boolean drm_2_8_0 = r300_screen(screen)->info.drm_minor >= 8;
 498     boolean is_r500 = r300_screen(screen)->caps.is_r500;
 499     boolean is_r400 = r300_screen(screen)->caps.is_r400;
 500     boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM ||
 501                               format == PIPE_FORMAT_R10G10B10X2_SNORM ||
 502                               format == PIPE_FORMAT_B10G10R10A2_UNORM ||
 503                               format == PIPE_FORMAT_B10G10R10X2_UNORM ||
 504                               format == PIPE_FORMAT_R10SG10SB10SA2U_NORM;
 505     boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM ||
 506                        format == PIPE_FORMAT_RGTC1_SNORM ||
 507                        format == PIPE_FORMAT_LATC1_UNORM ||
 508                        format == PIPE_FORMAT_LATC1_SNORM;
 509     boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM ||
 510                        format == PIPE_FORMAT_RGTC2_SNORM ||
 511                        format == PIPE_FORMAT_LATC2_UNORM ||
 512                        format == PIPE_FORMAT_LATC2_SNORM;
 513     boolean is_x16f_xy16f = format == PIPE_FORMAT_R16_FLOAT ||
 514                             format == PIPE_FORMAT_R16G16_FLOAT ||
 515                             format == PIPE_FORMAT_A16_FLOAT ||
 516                             format == PIPE_FORMAT_L16_FLOAT ||
 517                             format == PIPE_FORMAT_L16A16_FLOAT ||
 518                             format == PIPE_FORMAT_R16A16_FLOAT ||
 519                             format == PIPE_FORMAT_I16_FLOAT;
 520     boolean is_half_float = format == PIPE_FORMAT_R16_FLOAT ||
 521                             format == PIPE_FORMAT_R16G16_FLOAT ||
 522                             format == PIPE_FORMAT_R16G16B16_FLOAT ||
 523                             format == PIPE_FORMAT_R16G16B16A16_FLOAT ||
 524                             format == PIPE_FORMAT_R16G16B16X16_FLOAT;
 525     const struct util_format_description *desc;
 526
 527     if (!util_format_is_supported(format, usage))
 528        return FALSE;
 529
 530     /* Check multisampling support. */
 531     switch (sample_count) {
 532         case 0:
 533         case 1:
 534             break;
 535         case 2:
 536         case 4:
 537         case 6:
 538             /* We need DRM 2.8.0. */
 539             if (!drm_2_8_0) {
 540                 return FALSE;
 541             }
 542             /* No texturing and scanout. */
 543             if (usage & (PIPE_BIND_SAMPLER_VIEW |
 544                          PIPE_BIND_DISPLAY_TARGET |
 545                          PIPE_BIND_SCANOUT)) {
 546                 return FALSE;
 547             }
 548
 549             desc = util_format_description(format);
 550
 551             if (is_r500) {
 552                 /* Only allow depth/stencil, RGBA8, RGBA1010102, RGBA16F. */
 553                 if (!util_format_is_depth_or_stencil(format) &&
 554                     !util_format_is_rgba8_variant(desc) &&
 555                     !util_format_is_rgba1010102_variant(desc) &&
 556                     format != PIPE_FORMAT_R16G16B16A16_FLOAT &&
 557                     format != PIPE_FORMAT_R16G16B16X16_FLOAT) {
 558                     return FALSE;
 559                 }
 560             } else {
 561                 /* Only allow depth/stencil, RGBA8. */
 562                 if (!util_format_is_depth_or_stencil(format) &&
 563                     !util_format_is_rgba8_variant(desc)) {
 564                     return FALSE;
 565                 }
 566             }
 567             break;
 568         default:
 569             return FALSE;
 570     }
 571
 572     /* Check sampler format support. */
 573     if ((usage & PIPE_BIND_SAMPLER_VIEW) &&
 574         /* these two are broken for an unknown reason */
 575         format != PIPE_FORMAT_R8G8B8X8_SNORM &&
 576         format != PIPE_FORMAT_R16G16B16X16_SNORM &&
 577         /* ATI1N is r5xx-only. */
 578         (is_r500 || !is_ati1n) &&
 579         /* ATI2N is supported on r4xx-r5xx. */
 580         (is_r400 || is_r500 || !is_ati2n) &&
 581         /* R16F and RG16F texture support was added in as late as DRM 2.8.0 */
 582         (drm_2_8_0 || !is_x16f_xy16f) &&
 583         r300_is_sampler_format_supported(format)) {
 584         retval |= PIPE_BIND_SAMPLER_VIEW;
 585     }
 586
 587     /* Check colorbuffer format support. */
 588     if ((usage & (PIPE_BIND_RENDER_TARGET |
 589                   PIPE_BIND_DISPLAY_TARGET |
 590                   PIPE_BIND_SCANOUT |
 591                   PIPE_BIND_SHARED |
 592                   PIPE_BIND_BLENDABLE)) &&
 593         /* 2101010 cannot be rendered to on non-r5xx. */
 594         (!is_color2101010 || (is_r500 && drm_2_8_0)) &&
 595         r300_is_colorbuffer_format_supported(format)) {
 596         retval |= usage &
 597             (PIPE_BIND_RENDER_TARGET |
 598              PIPE_BIND_DISPLAY_TARGET |
 599              PIPE_BIND_SCANOUT |
 600              PIPE_BIND_SHARED);
 601
 602         if (r300_is_blending_supported(r300_screen(screen), format)) {
 603             retval |= usage & PIPE_BIND_BLENDABLE;
 604         }
 605     }
 606
 607     /* Check depth-stencil format support. */
 608     if (usage & PIPE_BIND_DEPTH_STENCIL &&
 609         r300_is_zs_format_supported(format)) {
 610         retval |= PIPE_BIND_DEPTH_STENCIL;
 611     }
 612
 613     /* Check vertex buffer format support. */
 614     if (usage & PIPE_BIND_VERTEX_BUFFER) {
 615         if (r300_screen(screen)->caps.has_tcl) {
 616             /* Half float is supported on >= R400. */
 617             if ((is_r400 || is_r500 || !is_half_float) &&
 618                 r300_translate_vertex_data_type(format) != R300_INVALID_FORMAT) {
 619                 retval |= PIPE_BIND_VERTEX_BUFFER;
 620             }
 621         } else {
 622             /* SW TCL */
 623             if (!util_format_is_pure_integer(format)) {
 624                 retval |= PIPE_BIND_VERTEX_BUFFER;
 625             }
 626         }
 627     }
 628
 629     /* Transfers are always supported. */
 630     if (usage & PIPE_BIND_TRANSFER_READ)
 631         retval |= PIPE_BIND_TRANSFER_READ;
 632     if (usage & PIPE_BIND_TRANSFER_WRITE)
 633         retval |= PIPE_BIND_TRANSFER_WRITE;
 634
 635     return retval == usage;
 636 }
 637
 638 static void r300_destroy_screen(struct pipe_screen* pscreen)
 639 {
 640     struct r300_screen* r300screen = r300_screen(pscreen);
 641     struct radeon_winsys *rws = radeon_winsys(pscreen);
 642
 643     if (rws && !rws->unref(rws))
 644       return;
 645
 646     pipe_mutex_destroy(r300screen->cmask_mutex);
 647
 648     if (rws)
 649       rws->destroy(rws);
 650
 651     FREE(r300screen);
 652 }
 653
 654 static void r300_fence_reference(struct pipe_screen *screen,
 655                                  struct pipe_fence_handle **ptr,
 656                                  struct pipe_fence_handle *fence)
 657 {
 658     struct radeon_winsys *rws = r300_screen(screen)->rws;
 659
 660     rws->fence_reference(ptr, fence);
 661 }
 662
 663 static boolean r300_fence_finish(struct pipe_screen *screen,
 664                                  struct pipe_fence_handle *fence,
 665                                  uint64_t timeout)
 666 {
 667     struct radeon_winsys *rws = r300_screen(screen)->rws;
 668
 669     return rws->fence_wait(rws, fence, timeout);
 670 }
 671
 672 struct pipe_screen* r300_screen_create(struct radeon_winsys *rws)
 673 {
 674     struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen);
 675
 676     if (!r300screen) {
 677         FREE(r300screen);
 678         return NULL;
 679     }
 680
 681     rws->query_info(rws, &r300screen->info);
 682
 683     r300_init_debug(r300screen);
 684     r300_parse_chipset(r300screen->info.pci_id, &r300screen->caps);
 685
 686     if (SCREEN_DBG_ON(r300screen, DBG_NO_ZMASK))
 687         r300screen->caps.zmask_ram = 0;
 688     if (SCREEN_DBG_ON(r300screen, DBG_NO_HIZ))
 689         r300screen->caps.hiz_ram = 0;
 690
 691     if (r300screen->info.drm_minor < 8)
 692         r300screen->caps.has_us_format = FALSE;
 693
 694     r300screen->rws = rws;
 695     r300screen->screen.destroy = r300_destroy_screen;
 696     r300screen->screen.get_name = r300_get_name;
 697     r300screen->screen.get_vendor = r300_get_vendor;
 698     r300screen->screen.get_device_vendor = r300_get_device_vendor;
 699     r300screen->screen.get_param = r300_get_param;
 700     r300screen->screen.get_shader_param = r300_get_shader_param;
 701     r300screen->screen.get_paramf = r300_get_paramf;
 702     r300screen->screen.get_video_param = r300_get_video_param;
 703     r300screen->screen.is_format_supported = r300_is_format_supported;
 704     r300screen->screen.is_video_format_supported = vl_video_buffer_is_format_supported;
 705     r300screen->screen.context_create = r300_create_context;
 706     r300screen->screen.fence_reference = r300_fence_reference;
 707     r300screen->screen.fence_finish = r300_fence_finish;
 708
 709     r300_init_screen_resource_functions(r300screen);
 710
 711     util_format_s3tc_init();
 712     pipe_mutex_init(r300screen->cmask_mutex);
 713
 714     return &r300screen->screen;
 715 }