p_state.h revision 16f8308c3df020a786908be065d3dcb90c8ca2a5
1/************************************************************************** 2 * 3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the 15 * next paragraph) shall be included in all copies or substantial portions 16 * of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR 22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 **************************************************************************/ 27 28 29/** 30 * @file 31 * 32 * Abstract graphics pipe state objects. 33 * 34 * Basic notes: 35 * 1. Want compact representations, so we use bitfields. 36 * 2. Put bitfields before other (GLfloat) fields. 37 */ 38 39 40#ifndef PIPE_STATE_H 41#define PIPE_STATE_H 42 43#include "p_compiler.h" 44#include "p_defines.h" 45#include "p_format.h" 46 47 48#ifdef __cplusplus 49extern "C" { 50#endif 51 52 53/** 54 * Implementation limits 55 */ 56#define PIPE_MAX_ATTRIBS 32 57#define PIPE_MAX_CLIP_PLANES 8 58#define PIPE_MAX_COLOR_BUFS 8 59#define PIPE_MAX_CONSTANT_BUFFERS 32 60#define PIPE_MAX_SAMPLERS 16 61#define PIPE_MAX_VERTEX_SAMPLERS 16 62#define PIPE_MAX_GEOMETRY_SAMPLERS 16 63#define PIPE_MAX_SHADER_INPUTS 32 64#define PIPE_MAX_SHADER_OUTPUTS 32 65#define PIPE_MAX_SHADER_RESOURCES 32 66#define PIPE_MAX_TEXTURE_LEVELS 16 67#define PIPE_MAX_SO_BUFFERS 4 68 69 70struct pipe_reference 71{ 72 int32_t count; /* atomic */ 73}; 74 75 76 77/** 78 * Primitive (point/line/tri) rasterization info 79 */ 80struct pipe_rasterizer_state 81{ 82 unsigned flatshade:1; 83 unsigned light_twoside:1; 84 unsigned clamp_vertex_color:1; 85 unsigned clamp_fragment_color:1; 86 unsigned front_ccw:1; 87 unsigned cull_face:2; /**< PIPE_FACE_x */ 88 unsigned fill_front:2; /**< PIPE_POLYGON_MODE_x */ 89 unsigned fill_back:2; /**< PIPE_POLYGON_MODE_x */ 90 unsigned offset_point:1; 91 unsigned offset_line:1; 92 unsigned offset_tri:1; 93 unsigned scissor:1; 94 unsigned poly_smooth:1; 95 unsigned poly_stipple_enable:1; 96 unsigned point_smooth:1; 97 unsigned sprite_coord_mode:1; /**< PIPE_SPRITE_COORD_ */ 98 unsigned point_quad_rasterization:1; /** points rasterized as quads or points */ 99 unsigned point_size_per_vertex:1; /**< size computed in vertex shader */ 100 unsigned multisample:1; /* XXX maybe more ms state in future */ 101 unsigned line_smooth:1; 102 unsigned line_stipple_enable:1; 103 unsigned line_last_pixel:1; 104 105 /** 106 * Use the first vertex of a primitive as the provoking vertex for 107 * flat shading. 108 */ 109 unsigned flatshade_first:1; 110 111 /** 112 * When true, triangle rasterization uses (0.5, 0.5) pixel centers 113 * for determining pixel ownership. 114 * 115 * When false, triangle rasterization uses (0,0) pixel centers for 116 * determining pixel ownership. 117 * 118 * Triangle rasterization always uses a 'top,left' rule for pixel 119 * ownership, this just alters which point we consider the pixel 120 * center for that test. 121 */ 122 unsigned gl_rasterization_rules:1; 123 124 unsigned line_stipple_factor:8; /**< [1..256] actually */ 125 unsigned line_stipple_pattern:16; 126 127 unsigned sprite_coord_enable:PIPE_MAX_SHADER_OUTPUTS; 128 129 float line_width; 130 float point_size; /**< used when no per-vertex size */ 131 float offset_units; 132 float offset_scale; 133 float offset_clamp; 134}; 135 136 137struct pipe_poly_stipple 138{ 139 unsigned stipple[32]; 140}; 141 142 143struct pipe_viewport_state 144{ 145 float scale[4]; 146 float translate[4]; 147}; 148 149 150struct pipe_scissor_state 151{ 152 unsigned minx:16; 153 unsigned miny:16; 154 unsigned maxx:16; 155 unsigned maxy:16; 156}; 157 158 159struct pipe_clip_state 160{ 161 float ucp[PIPE_MAX_CLIP_PLANES][4]; 162 unsigned nr; 163 unsigned depth_clamp:1; 164}; 165 166 167struct pipe_shader_state 168{ 169 const struct tgsi_token *tokens; 170}; 171 172 173struct pipe_depth_state 174{ 175 unsigned enabled:1; /**< depth test enabled? */ 176 unsigned writemask:1; /**< allow depth buffer writes? */ 177 unsigned func:3; /**< depth test func (PIPE_FUNC_x) */ 178}; 179 180 181struct pipe_stencil_state 182{ 183 unsigned enabled:1; /**< stencil[0]: stencil enabled, stencil[1]: two-side enabled */ 184 unsigned func:3; /**< PIPE_FUNC_x */ 185 unsigned fail_op:3; /**< PIPE_STENCIL_OP_x */ 186 unsigned zpass_op:3; /**< PIPE_STENCIL_OP_x */ 187 unsigned zfail_op:3; /**< PIPE_STENCIL_OP_x */ 188 unsigned valuemask:8; 189 unsigned writemask:8; 190}; 191 192 193struct pipe_alpha_state 194{ 195 unsigned enabled:1; 196 unsigned func:3; /**< PIPE_FUNC_x */ 197 float ref_value; /**< reference value */ 198}; 199 200 201struct pipe_depth_stencil_alpha_state 202{ 203 struct pipe_depth_state depth; 204 struct pipe_stencil_state stencil[2]; /**< [0] = front, [1] = back */ 205 struct pipe_alpha_state alpha; 206}; 207 208 209struct pipe_rt_blend_state 210{ 211 unsigned blend_enable:1; 212 213 unsigned rgb_func:3; /**< PIPE_BLEND_x */ 214 unsigned rgb_src_factor:5; /**< PIPE_BLENDFACTOR_x */ 215 unsigned rgb_dst_factor:5; /**< PIPE_BLENDFACTOR_x */ 216 217 unsigned alpha_func:3; /**< PIPE_BLEND_x */ 218 unsigned alpha_src_factor:5; /**< PIPE_BLENDFACTOR_x */ 219 unsigned alpha_dst_factor:5; /**< PIPE_BLENDFACTOR_x */ 220 221 unsigned colormask:4; /**< bitmask of PIPE_MASK_R/G/B/A */ 222}; 223 224struct pipe_blend_state 225{ 226 unsigned independent_blend_enable:1; 227 unsigned logicop_enable:1; 228 unsigned logicop_func:4; /**< PIPE_LOGICOP_x */ 229 unsigned dither:1; 230 unsigned alpha_to_coverage:1; 231 unsigned alpha_to_one:1; 232 struct pipe_rt_blend_state rt[PIPE_MAX_COLOR_BUFS]; 233}; 234 235 236struct pipe_blend_color 237{ 238 float color[4]; 239}; 240 241struct pipe_stencil_ref 242{ 243 ubyte ref_value[2]; 244}; 245 246struct pipe_framebuffer_state 247{ 248 unsigned width, height; 249 250 /** multiple color buffers for multiple render targets */ 251 unsigned nr_cbufs; 252 struct pipe_surface *cbufs[PIPE_MAX_COLOR_BUFS]; 253 254 struct pipe_surface *zsbuf; /**< Z/stencil buffer */ 255}; 256 257 258/** 259 * Texture sampler state. 260 */ 261struct pipe_sampler_state 262{ 263 unsigned wrap_s:3; /**< PIPE_TEX_WRAP_x */ 264 unsigned wrap_t:3; /**< PIPE_TEX_WRAP_x */ 265 unsigned wrap_r:3; /**< PIPE_TEX_WRAP_x */ 266 unsigned min_img_filter:2; /**< PIPE_TEX_FILTER_x */ 267 unsigned min_mip_filter:2; /**< PIPE_TEX_MIPFILTER_x */ 268 unsigned mag_img_filter:2; /**< PIPE_TEX_FILTER_x */ 269 unsigned compare_mode:1; /**< PIPE_TEX_COMPARE_x */ 270 unsigned compare_func:3; /**< PIPE_FUNC_x */ 271 unsigned normalized_coords:1; /**< Are coords normalized to [0,1]? */ 272 unsigned max_anisotropy:6; 273 unsigned seamless_cube_map:1; 274 float lod_bias; /**< LOD/lambda bias */ 275 float min_lod, max_lod; /**< LOD clamp range, after bias */ 276 union pipe_color_union border_color; 277}; 278 279 280/** 281 * A view into a texture that can be bound to a color render target / 282 * depth stencil attachment point. 283 */ 284struct pipe_surface 285{ 286 struct pipe_reference reference; 287 struct pipe_resource *texture; /**< resource into which this is a view */ 288 struct pipe_context *context; /**< context this view belongs to */ 289 enum pipe_format format; 290 291 /* XXX width/height should be removed */ 292 unsigned width; /**< logical width in pixels */ 293 unsigned height; /**< logical height in pixels */ 294 295 unsigned usage; /**< bitmask of PIPE_BIND_x */ 296 297 union { 298 struct { 299 unsigned level; 300 unsigned first_layer:16; 301 unsigned last_layer:16; 302 } tex; 303 struct { 304 unsigned first_element; 305 unsigned last_element; 306 } buf; 307 } u; 308}; 309 310 311/** 312 * A view into a texture that can be bound to a shader stage. 313 */ 314struct pipe_sampler_view 315{ 316 struct pipe_reference reference; 317 enum pipe_format format; /**< typed PIPE_FORMAT_x */ 318 struct pipe_resource *texture; /**< texture into which this is a view */ 319 struct pipe_context *context; /**< context this view belongs to */ 320 union { 321 struct { 322 unsigned first_layer:16; /**< first layer to use for array textures */ 323 unsigned last_layer:16; /**< last layer to use for array textures */ 324 unsigned first_level:8; /**< first mipmap level to use */ 325 unsigned last_level:8; /**< last mipmap level to use */ 326 } tex; 327 struct { 328 unsigned first_element; 329 unsigned last_element; 330 } buf; 331 } u; 332 unsigned swizzle_r:3; /**< PIPE_SWIZZLE_x for red component */ 333 unsigned swizzle_g:3; /**< PIPE_SWIZZLE_x for green component */ 334 unsigned swizzle_b:3; /**< PIPE_SWIZZLE_x for blue component */ 335 unsigned swizzle_a:3; /**< PIPE_SWIZZLE_x for alpha component */ 336}; 337 338 339/** 340 * Subregion of 1D/2D/3D image resource. 341 */ 342struct pipe_box 343{ 344 unsigned x; 345 unsigned y; 346 unsigned z; 347 unsigned width; 348 unsigned height; 349 unsigned depth; 350}; 351 352 353/** 354 * A memory object/resource such as a vertex buffer or texture. 355 */ 356struct pipe_resource 357{ 358 struct pipe_reference reference; 359 struct pipe_screen *screen; /**< screen that this texture belongs to */ 360 enum pipe_texture_target target; /**< PIPE_TEXTURE_x */ 361 enum pipe_format format; /**< PIPE_FORMAT_x */ 362 363 unsigned width0; 364 unsigned height0; 365 unsigned depth0; 366 unsigned array_size; 367 368 unsigned last_level:8; /**< Index of last mipmap level present/defined */ 369 unsigned nr_samples:8; /**< for multisampled surfaces, nr of samples */ 370 unsigned usage:8; /**< PIPE_USAGE_x (not a bitmask) */ 371 372 unsigned bind; /**< bitmask of PIPE_BIND_x */ 373 unsigned flags; /**< bitmask of PIPE_RESOURCE_FLAG_x */ 374}; 375 376 377/** 378 * Stream output for vertex transform feedback. 379 */ 380struct pipe_stream_output_state 381{ 382 /** number of the output buffer to insert each element into */ 383 int output_buffer[PIPE_MAX_SHADER_OUTPUTS]; 384 /** which register to grab each output from */ 385 int register_index[PIPE_MAX_SHADER_OUTPUTS]; 386 /** TGSI_WRITEMASK signifying which components to output */ 387 ubyte register_mask[PIPE_MAX_SHADER_OUTPUTS]; 388 /** number of outputs */ 389 int num_outputs; 390 /** stride for an entire vertex, only used if all output_buffers are 0 */ 391 unsigned stride; 392}; 393 394 395/** 396 * Transfer object. For data transfer to/from a resource. 397 */ 398struct pipe_transfer 399{ 400 struct pipe_resource *resource; /**< resource to transfer to/from */ 401 unsigned level; /**< texture mipmap level */ 402 enum pipe_transfer_usage usage; 403 struct pipe_box box; /**< region of the resource to access */ 404 unsigned stride; /**< row stride in bytes */ 405 unsigned layer_stride; /**< image/layer stride in bytes */ 406 void *data; 407}; 408 409 410 411/** 412 * A vertex buffer. Typically, all the vertex data/attributes for 413 * drawing something will be in one buffer. But it's also possible, for 414 * example, to put colors in one buffer and texcoords in another. 415 */ 416struct pipe_vertex_buffer 417{ 418 unsigned stride; /**< stride to same attrib in next vertex, in bytes */ 419 unsigned buffer_offset; /**< offset to start of data in buffer, in bytes */ 420 struct pipe_resource *buffer; /**< the actual buffer */ 421}; 422 423 424/** 425 * Information to describe a vertex attribute (position, color, etc) 426 */ 427struct pipe_vertex_element 428{ 429 /** Offset of this attribute, in bytes, from the start of the vertex */ 430 unsigned src_offset; 431 432 /** Instance data rate divisor. 0 means this is per-vertex data, 433 * n means per-instance data used for n consecutive instances (n > 0). 434 */ 435 unsigned instance_divisor; 436 437 /** Which vertex_buffer (as given to pipe->set_vertex_buffer()) does 438 * this attribute live in? 439 */ 440 unsigned vertex_buffer_index; 441 442 enum pipe_format src_format; 443}; 444 445 446/** 447 * An index buffer. When an index buffer is bound, all indices to vertices 448 * will be looked up in the buffer. 449 */ 450struct pipe_index_buffer 451{ 452 unsigned index_size; /**< size of an index, in bytes */ 453 unsigned offset; /**< offset to start of data in buffer, in bytes */ 454 struct pipe_resource *buffer; /**< the actual buffer */ 455}; 456 457 458/** 459 * Information to describe a draw_vbo call. 460 */ 461struct pipe_draw_info 462{ 463 boolean indexed; /**< use index buffer */ 464 465 unsigned mode; /**< the mode of the primitive */ 466 unsigned start; /**< the index of the first vertex */ 467 unsigned count; /**< number of vertices */ 468 469 unsigned start_instance; /**< first instance id */ 470 unsigned instance_count; /**< number of instances */ 471 472 /** 473 * For indexed drawing, these fields apply after index lookup. 474 */ 475 int index_bias; /**< a bias to be added to each index */ 476 unsigned min_index; /**< the min index */ 477 unsigned max_index; /**< the max index */ 478 479 /** 480 * Primitive restart enable/index (only applies to indexed drawing) 481 */ 482 boolean primitive_restart; 483 unsigned restart_index; 484}; 485 486 487/** 488 * Information to describe a resource_resolve call. 489 */ 490struct pipe_resolve_info 491{ 492 struct { 493 struct pipe_resource *res; 494 unsigned level; 495 unsigned layer; 496 int x0; /**< always left */ 497 int y0; /**< always top */ 498 int x1; /**< determines scale if PIPE_CAP_SCALED_RESOLVE is supported */ 499 int y1; /**< determines scale if PIPE_CAP_SCALED_RESOLVE is supported */ 500 } dst; 501 502 struct { 503 struct pipe_resource *res; 504 unsigned layer; 505 int x0; 506 int y0; 507 int x1; /**< may be < x0 only if PIPE_CAP_SCALED_RESOLVE is supported */ 508 int y1; /**< may be < y1 even if PIPE_CAP_SCALED_RESOLVE not supported */ 509 } src; 510 511 unsigned mask; /**< PIPE_MASK_RGBA, Z, S or ZS */ 512}; 513 514 515#ifdef __cplusplus 516} 517#endif 518 519#endif 520