r300_screen.c revision bc1c8369384b5e16547c5bf9728aa78f8dfd66cc
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.) */ 45static const char* r300_get_vendor(struct pipe_screen* pscreen) 46{ 47 return "X.Org R300 Project"; 48} 49 50static const char* chip_families[] = { 51 "ATI R300", 52 "ATI R350", 53 "ATI RV350", 54 "ATI RV370", 55 "ATI RV380", 56 "ATI RS400", 57 "ATI RC410", 58 "ATI RS480", 59 "ATI R420", 60 "ATI R423", 61 "ATI R430", 62 "ATI R480", 63 "ATI R481", 64 "ATI RV410", 65 "ATI RS600", 66 "ATI RS690", 67 "ATI RS740", 68 "ATI RV515", 69 "ATI R520", 70 "ATI RV530", 71 "ATI R580", 72 "ATI RV560", 73 "ATI RV570" 74}; 75 76static const char* r300_get_name(struct pipe_screen* pscreen) 77{ 78 struct r300_screen* r300screen = r300_screen(pscreen); 79 80 return chip_families[r300screen->caps.family]; 81} 82 83static int r300_get_param(struct pipe_screen* pscreen, enum pipe_cap param) 84{ 85 struct r300_screen* r300screen = r300_screen(pscreen); 86 boolean is_r500 = r300screen->caps.is_r500; 87 88 switch (param) { 89 /* Supported features (boolean caps). */ 90 case PIPE_CAP_NPOT_TEXTURES: 91 case PIPE_CAP_TWO_SIDED_STENCIL: 92 case PIPE_CAP_ANISOTROPIC_FILTER: 93 case PIPE_CAP_POINT_SPRITE: 94 case PIPE_CAP_OCCLUSION_QUERY: 95 case PIPE_CAP_TEXTURE_SHADOW_MAP: 96 case PIPE_CAP_TEXTURE_MIRROR_CLAMP: 97 case PIPE_CAP_BLEND_EQUATION_SEPARATE: 98 case PIPE_CAP_VERTEX_ELEMENT_INSTANCE_DIVISOR: 99 case PIPE_CAP_TGSI_FS_COORD_ORIGIN_UPPER_LEFT: 100 case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_HALF_INTEGER: 101 case PIPE_CAP_CONDITIONAL_RENDER: 102 case PIPE_CAP_TEXTURE_BARRIER: 103 case PIPE_CAP_TGSI_CAN_COMPACT_VARYINGS: 104 case PIPE_CAP_TGSI_CAN_COMPACT_CONSTANTS: 105 case PIPE_CAP_VERTEX_COLOR_CLAMPED: 106 return 1; 107 108 /* r300 cannot do swizzling of compressed textures. Supported otherwise. */ 109 case PIPE_CAP_TEXTURE_SWIZZLE: 110 return util_format_s3tc_enabled ? r300screen->caps.dxtc_swizzle : 1; 111 112 /* Supported on r500 only. */ 113 case PIPE_CAP_VERTEX_COLOR_UNCLAMPED: 114 case PIPE_CAP_MIXED_COLORBUFFER_FORMATS: 115 case PIPE_CAP_SM3: 116 return is_r500 ? 1 : 0; 117 118 /* Unsupported features. */ 119 case PIPE_CAP_TIMER_QUERY: 120 case PIPE_CAP_DUAL_SOURCE_BLEND: 121 case PIPE_CAP_INDEP_BLEND_ENABLE: 122 case PIPE_CAP_INDEP_BLEND_FUNC: 123 case PIPE_CAP_DEPTH_CLIP_DISABLE: 124 case PIPE_CAP_DEPTHSTENCIL_CLEAR_SEPARATE: 125 case PIPE_CAP_SHADER_STENCIL_EXPORT: 126 case PIPE_CAP_MAX_TEXTURE_ARRAY_LAYERS: 127 case PIPE_CAP_TGSI_INSTANCEID: 128 case PIPE_CAP_TGSI_FS_COORD_ORIGIN_LOWER_LEFT: 129 case PIPE_CAP_TGSI_FS_COORD_PIXEL_CENTER_INTEGER: 130 case PIPE_CAP_SEAMLESS_CUBE_MAP: 131 case PIPE_CAP_SEAMLESS_CUBE_MAP_PER_TEXTURE: 132 case PIPE_CAP_SCALED_RESOLVE: 133 case PIPE_CAP_MIN_TEXEL_OFFSET: 134 case PIPE_CAP_MAX_TEXEL_OFFSET: 135 case PIPE_CAP_MAX_STREAM_OUTPUT_BUFFERS: 136 case PIPE_CAP_MAX_STREAM_OUTPUT_SEPARATE_COMPONENTS: 137 case PIPE_CAP_MAX_STREAM_OUTPUT_INTERLEAVED_COMPONENTS: 138 case PIPE_CAP_STREAM_OUTPUT_PAUSE_RESUME: 139 case PIPE_CAP_FRAGMENT_COLOR_CLAMPED: 140 return 0; 141 142 /* SWTCL-only features. */ 143 case PIPE_CAP_PRIMITIVE_RESTART: 144 return !r300screen->caps.has_tcl; 145 146 /* Texturing. */ 147 case PIPE_CAP_MAX_COMBINED_SAMPLERS: 148 return r300screen->caps.num_tex_units; 149 case PIPE_CAP_MAX_TEXTURE_2D_LEVELS: 150 case PIPE_CAP_MAX_TEXTURE_3D_LEVELS: 151 case PIPE_CAP_MAX_TEXTURE_CUBE_LEVELS: 152 /* 13 == 4096, 12 == 2048 */ 153 return is_r500 ? 13 : 12; 154 155 /* Render targets. */ 156 case PIPE_CAP_MAX_RENDER_TARGETS: 157 return 4; 158 } 159 return 0; 160} 161 162static int r300_get_shader_param(struct pipe_screen *pscreen, unsigned shader, enum pipe_shader_cap param) 163{ 164 struct r300_screen* r300screen = r300_screen(pscreen); 165 boolean is_r400 = r300screen->caps.is_r400; 166 boolean is_r500 = r300screen->caps.is_r500; 167 168 switch (shader) { 169 case PIPE_SHADER_FRAGMENT: 170 switch (param) 171 { 172 case PIPE_SHADER_CAP_MAX_INSTRUCTIONS: 173 return is_r500 || is_r400 ? 512 : 96; 174 case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS: 175 return is_r500 || is_r400 ? 512 : 64; 176 case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS: 177 return is_r500 || is_r400 ? 512 : 32; 178 case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS: 179 return is_r500 ? 511 : 4; 180 case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH: 181 return is_r500 ? 64 : 0; /* Actually unlimited on r500. */ 182 /* Fragment shader limits. */ 183 case PIPE_SHADER_CAP_MAX_INPUTS: 184 /* 2 colors + 8 texcoords are always supported 185 * (minus fog and wpos). 186 * 187 * R500 has the ability to turn 3rd and 4th color into 188 * additional texcoords but there is no two-sided color 189 * selection then. However the facing bit can be used instead. */ 190 return 10; 191 case PIPE_SHADER_CAP_MAX_CONSTS: 192 return is_r500 ? 256 : 32; 193 case PIPE_SHADER_CAP_MAX_CONST_BUFFERS: 194 return 1; 195 case PIPE_SHADER_CAP_MAX_TEMPS: 196 return is_r500 ? 128 : is_r400 ? 64 : 32; 197 case PIPE_SHADER_CAP_MAX_PREDS: 198 return is_r500 ? 1 : 0; 199 case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS: 200 return r300screen->caps.num_tex_units; 201 case PIPE_SHADER_CAP_MAX_ADDRS: 202 case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED: 203 case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR: 204 case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR: 205 case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR: 206 case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR: 207 case PIPE_SHADER_CAP_SUBROUTINES: 208 case PIPE_SHADER_CAP_INTEGERS: 209 case PIPE_SHADER_CAP_OUTPUT_READ: 210 return 0; 211 } 212 break; 213 case PIPE_SHADER_VERTEX: 214 switch (param) 215 { 216 case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS: 217 return 0; 218 default:; 219 } 220 221 if (!r300screen->caps.has_tcl) { 222 return draw_get_shader_param(shader, param); 223 } 224 225 switch (param) 226 { 227 case PIPE_SHADER_CAP_MAX_INSTRUCTIONS: 228 case PIPE_SHADER_CAP_MAX_ALU_INSTRUCTIONS: 229 return is_r500 ? 1024 : 256; 230 case PIPE_SHADER_CAP_MAX_CONTROL_FLOW_DEPTH: 231 return is_r500 ? 4 : 0; /* For loops; not sure about conditionals. */ 232 case PIPE_SHADER_CAP_MAX_INPUTS: 233 return 16; 234 case PIPE_SHADER_CAP_MAX_CONSTS: 235 return 256; 236 case PIPE_SHADER_CAP_MAX_CONST_BUFFERS: 237 return 1; 238 case PIPE_SHADER_CAP_MAX_TEMPS: 239 return 32; 240 case PIPE_SHADER_CAP_MAX_ADDRS: 241 return 1; /* XXX guessed */ 242 case PIPE_SHADER_CAP_MAX_PREDS: 243 return is_r500 ? 4 : 0; /* XXX guessed. */ 244 case PIPE_SHADER_CAP_INDIRECT_CONST_ADDR: 245 return 1; 246 case PIPE_SHADER_CAP_MAX_TEX_INSTRUCTIONS: 247 case PIPE_SHADER_CAP_MAX_TEX_INDIRECTIONS: 248 case PIPE_SHADER_CAP_TGSI_CONT_SUPPORTED: 249 case PIPE_SHADER_CAP_INDIRECT_INPUT_ADDR: 250 case PIPE_SHADER_CAP_INDIRECT_OUTPUT_ADDR: 251 case PIPE_SHADER_CAP_INDIRECT_TEMP_ADDR: 252 case PIPE_SHADER_CAP_SUBROUTINES: 253 case PIPE_SHADER_CAP_INTEGERS: 254 case PIPE_SHADER_CAP_MAX_TEXTURE_SAMPLERS: 255 case PIPE_SHADER_CAP_OUTPUT_READ: 256 return 0; 257 } 258 break; 259 } 260 return 0; 261} 262 263static float r300_get_paramf(struct pipe_screen* pscreen, 264 enum pipe_capf param) 265{ 266 struct r300_screen* r300screen = r300_screen(pscreen); 267 268 switch (param) { 269 case PIPE_CAPF_MAX_LINE_WIDTH: 270 case PIPE_CAPF_MAX_LINE_WIDTH_AA: 271 case PIPE_CAPF_MAX_POINT_WIDTH: 272 case PIPE_CAPF_MAX_POINT_WIDTH_AA: 273 /* The maximum dimensions of the colorbuffer are our practical 274 * rendering limits. 2048 pixels should be enough for anybody. */ 275 if (r300screen->caps.is_r500) { 276 return 4096.0f; 277 } else if (r300screen->caps.is_r400) { 278 return 4021.0f; 279 } else { 280 return 2560.0f; 281 } 282 case PIPE_CAPF_MAX_TEXTURE_ANISOTROPY: 283 return 16.0f; 284 case PIPE_CAPF_MAX_TEXTURE_LOD_BIAS: 285 return 16.0f; 286 case PIPE_CAPF_GUARD_BAND_LEFT: 287 case PIPE_CAPF_GUARD_BAND_TOP: 288 case PIPE_CAPF_GUARD_BAND_RIGHT: 289 case PIPE_CAPF_GUARD_BAND_BOTTOM: 290 /* XXX I don't know what these should be but the least we can do is 291 * silence the potential error message */ 292 return 0.0f; 293 default: 294 debug_printf("r300: Warning: Unknown CAP %d in get_paramf.\n", 295 param); 296 return 0.0f; 297 } 298} 299 300static int r300_get_video_param(struct pipe_screen *screen, 301 enum pipe_video_profile profile, 302 enum pipe_video_cap param) 303{ 304 switch (param) { 305 case PIPE_VIDEO_CAP_SUPPORTED: 306 return vl_profile_supported(screen, profile); 307 case PIPE_VIDEO_CAP_NPOT_TEXTURES: 308 return 0; 309 case PIPE_VIDEO_CAP_MAX_WIDTH: 310 case PIPE_VIDEO_CAP_MAX_HEIGHT: 311 return vl_video_buffer_max_size(screen); 312 case PIPE_VIDEO_CAP_PREFERED_FORMAT: 313 return PIPE_FORMAT_NV12; 314 default: 315 return 0; 316 } 317} 318 319static boolean r300_is_format_supported(struct pipe_screen* screen, 320 enum pipe_format format, 321 enum pipe_texture_target target, 322 unsigned sample_count, 323 unsigned usage) 324{ 325 uint32_t retval = 0; 326 boolean drm_2_8_0 = r300_screen(screen)->info.drm_minor >= 8; 327 boolean is_r500 = r300_screen(screen)->caps.is_r500; 328 boolean is_r400 = r300_screen(screen)->caps.is_r400; 329 boolean is_color2101010 = format == PIPE_FORMAT_R10G10B10A2_UNORM || 330 format == PIPE_FORMAT_R10G10B10X2_SNORM || 331 format == PIPE_FORMAT_B10G10R10A2_UNORM || 332 format == PIPE_FORMAT_R10SG10SB10SA2U_NORM; 333 boolean is_ati1n = format == PIPE_FORMAT_RGTC1_UNORM || 334 format == PIPE_FORMAT_RGTC1_SNORM || 335 format == PIPE_FORMAT_LATC1_UNORM || 336 format == PIPE_FORMAT_LATC1_SNORM; 337 boolean is_ati2n = format == PIPE_FORMAT_RGTC2_UNORM || 338 format == PIPE_FORMAT_RGTC2_SNORM || 339 format == PIPE_FORMAT_LATC2_UNORM || 340 format == PIPE_FORMAT_LATC2_SNORM; 341 boolean is_x16f_xy16f = format == PIPE_FORMAT_R16_FLOAT || 342 format == PIPE_FORMAT_R16G16_FLOAT || 343 format == PIPE_FORMAT_A16_FLOAT || 344 format == PIPE_FORMAT_L16_FLOAT || 345 format == PIPE_FORMAT_L16A16_FLOAT || 346 format == PIPE_FORMAT_I16_FLOAT; 347 boolean is_half_float = format == PIPE_FORMAT_R16_FLOAT || 348 format == PIPE_FORMAT_R16G16_FLOAT || 349 format == PIPE_FORMAT_R16G16B16_FLOAT || 350 format == PIPE_FORMAT_R16G16B16A16_FLOAT; 351 boolean is_fixed = format == PIPE_FORMAT_R32_FIXED || 352 format == PIPE_FORMAT_R32G32_FIXED || 353 format == PIPE_FORMAT_R32G32B32_FIXED || 354 format == PIPE_FORMAT_R32G32B32A32_FIXED; 355 356 if (!util_format_is_supported(format, usage)) 357 return FALSE; 358 359 /* Check multisampling support. */ 360 switch (sample_count) { 361 case 0: 362 case 1: 363 break; 364 case 2: 365 case 3: 366 case 4: 367 case 6: 368 return FALSE; 369#if 0 370 if (usage != PIPE_BIND_RENDER_TARGET || 371 !util_format_is_rgba8_variant( 372 util_format_description(format))) { 373 return FALSE; 374 } 375#endif 376 break; 377 default: 378 return FALSE; 379 } 380 381 /* Check sampler format support. */ 382 if ((usage & PIPE_BIND_SAMPLER_VIEW) && 383 /* ATI1N is r5xx-only. */ 384 (is_r500 || !is_ati1n) && 385 /* ATI2N is supported on r4xx-r5xx. */ 386 (is_r400 || is_r500 || !is_ati2n) && 387 /* R16F and RG16F texture support was added in as late as DRM 2.8.0 */ 388 (drm_2_8_0 || !is_x16f_xy16f) && 389 r300_is_sampler_format_supported(format)) { 390 retval |= PIPE_BIND_SAMPLER_VIEW; 391 } 392 393 /* Check colorbuffer format support. */ 394 if ((usage & (PIPE_BIND_RENDER_TARGET | 395 PIPE_BIND_DISPLAY_TARGET | 396 PIPE_BIND_SCANOUT | 397 PIPE_BIND_SHARED)) && 398 /* 2101010 cannot be rendered to on non-r5xx. */ 399 (!is_color2101010 || (is_r500 && drm_2_8_0)) && 400 r300_is_colorbuffer_format_supported(format)) { 401 retval |= usage & 402 (PIPE_BIND_RENDER_TARGET | 403 PIPE_BIND_DISPLAY_TARGET | 404 PIPE_BIND_SCANOUT | 405 PIPE_BIND_SHARED); 406 } 407 408 /* Check depth-stencil format support. */ 409 if (usage & PIPE_BIND_DEPTH_STENCIL && 410 r300_is_zs_format_supported(format)) { 411 retval |= PIPE_BIND_DEPTH_STENCIL; 412 } 413 414 /* Check vertex buffer format support. */ 415 if (usage & PIPE_BIND_VERTEX_BUFFER && 416 /* Half float is supported on >= R400. */ 417 (is_r400 || is_r500 || !is_half_float) && 418 /* We have a fallback for FIXED. */ 419 (is_fixed || r300_translate_vertex_data_type(format) != R300_INVALID_FORMAT)) { 420 retval |= PIPE_BIND_VERTEX_BUFFER; 421 } 422 423 /* Transfers are always supported. */ 424 if (usage & PIPE_BIND_TRANSFER_READ) 425 retval |= PIPE_BIND_TRANSFER_READ; 426 if (usage & PIPE_BIND_TRANSFER_WRITE) 427 retval |= PIPE_BIND_TRANSFER_WRITE; 428 429 return retval == usage; 430} 431 432static void r300_destroy_screen(struct pipe_screen* pscreen) 433{ 434 struct r300_screen* r300screen = r300_screen(pscreen); 435 struct radeon_winsys *rws = radeon_winsys(pscreen); 436 437 util_slab_destroy(&r300screen->pool_buffers); 438 pipe_mutex_destroy(r300screen->num_contexts_mutex); 439 440 if (rws) 441 rws->destroy(rws); 442 443 FREE(r300screen); 444} 445 446static void r300_fence_reference(struct pipe_screen *screen, 447 struct pipe_fence_handle **ptr, 448 struct pipe_fence_handle *fence) 449{ 450 pb_reference((struct pb_buffer**)ptr, 451 (struct pb_buffer*)fence); 452} 453 454static boolean r300_fence_signalled(struct pipe_screen *screen, 455 struct pipe_fence_handle *fence) 456{ 457 struct radeon_winsys *rws = r300_screen(screen)->rws; 458 struct pb_buffer *rfence = (struct pb_buffer*)fence; 459 460 return !rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE); 461} 462 463static boolean r300_fence_finish(struct pipe_screen *screen, 464 struct pipe_fence_handle *fence, 465 uint64_t timeout) 466{ 467 struct radeon_winsys *rws = r300_screen(screen)->rws; 468 struct pb_buffer *rfence = (struct pb_buffer*)fence; 469 470 if (timeout != PIPE_TIMEOUT_INFINITE) { 471 int64_t start_time = os_time_get(); 472 473 /* Convert to microseconds. */ 474 timeout /= 1000; 475 476 /* Wait in a loop. */ 477 while (rws->buffer_is_busy(rfence, RADEON_USAGE_READWRITE)) { 478 if (os_time_get() - start_time >= timeout) { 479 return FALSE; 480 } 481 os_time_sleep(10); 482 } 483 return TRUE; 484 } 485 486 rws->buffer_wait(rfence, RADEON_USAGE_READWRITE); 487 return TRUE; 488} 489 490struct pipe_screen* r300_screen_create(struct radeon_winsys *rws) 491{ 492 struct r300_screen *r300screen = CALLOC_STRUCT(r300_screen); 493 494 if (!r300screen) { 495 FREE(r300screen); 496 return NULL; 497 } 498 499 rws->query_info(rws, &r300screen->info); 500 501 r300_init_debug(r300screen); 502 r300_parse_chipset(r300screen->info.pci_id, &r300screen->caps); 503 504 if (SCREEN_DBG_ON(r300screen, DBG_NO_ZMASK)) 505 r300screen->caps.zmask_ram = 0; 506 if (SCREEN_DBG_ON(r300screen, DBG_NO_HIZ)) 507 r300screen->caps.hiz_ram = 0; 508 509 if (r300screen->info.drm_minor < 8) 510 r300screen->caps.has_us_format = FALSE; 511 512 pipe_mutex_init(r300screen->num_contexts_mutex); 513 514 util_slab_create(&r300screen->pool_buffers, 515 sizeof(struct r300_resource), 64, 516 UTIL_SLAB_SINGLETHREADED); 517 518 r300screen->rws = rws; 519 r300screen->screen.winsys = (struct pipe_winsys*)rws; 520 r300screen->screen.destroy = r300_destroy_screen; 521 r300screen->screen.get_name = r300_get_name; 522 r300screen->screen.get_vendor = r300_get_vendor; 523 r300screen->screen.get_param = r300_get_param; 524 r300screen->screen.get_shader_param = r300_get_shader_param; 525 r300screen->screen.get_paramf = r300_get_paramf; 526 r300screen->screen.get_video_param = r300_get_video_param; 527 r300screen->screen.is_format_supported = r300_is_format_supported; 528 r300screen->screen.is_video_format_supported = vl_video_buffer_is_format_supported; 529 r300screen->screen.context_create = r300_create_context; 530 r300screen->screen.fence_reference = r300_fence_reference; 531 r300screen->screen.fence_signalled = r300_fence_signalled; 532 r300screen->screen.fence_finish = r300_fence_finish; 533 534 r300_init_screen_resource_functions(r300screen); 535 536 util_format_s3tc_init(); 537 538 return &r300screen->screen; 539} 540