p_state.h revision b2021e7c06a9ec13b82eeeb352ad2408fe060518
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 * Abstract graphics pipe state objects. 31 * 32 * Basic notes: 33 * 1. Want compact representations, so we use bitfields. 34 * 2. Put bitfields before other (GLfloat) fields. 35 */ 36 37 38#ifndef PIPE_STATE_H 39#define PIPE_STATE_H 40 41#include "p_compiler.h" 42#include "p_defines.h" 43#include "p_format.h" 44 45 46#ifdef __cplusplus 47extern "C" { 48#endif 49 50 51/** 52 * Implementation limits 53 */ 54#define PIPE_MAX_ATTRIBS 32 55#define PIPE_MAX_CLIP_PLANES 6 56#define PIPE_MAX_COLOR_BUFS 8 57#define PIPE_MAX_CONSTANT 32 58#define PIPE_MAX_SAMPLERS 16 59#define PIPE_MAX_SHADER_INPUTS 16 60#define PIPE_MAX_SHADER_OUTPUTS 16 61#define PIPE_MAX_TEXTURE_LEVELS 16 62 63 64/* fwd decls */ 65struct pipe_screen; 66struct pipe_surface; 67struct pipe_winsys; 68 69 70 71/** 72 * The driver will certainly subclass this to include actual memory 73 * management information. 74 */ 75struct pipe_buffer 76{ 77 unsigned alignment; 78 unsigned usage; 79 unsigned size; 80 81 /** Reference count */ 82 unsigned refcount; 83}; 84 85 86/** 87 * Primitive (point/line/tri) rasterization info 88 */ 89struct pipe_rasterizer_state 90{ 91 unsigned flatshade:1; 92 unsigned light_twoside:1; 93 unsigned front_winding:2; /**< PIPE_WINDING_x */ 94 unsigned cull_mode:2; /**< PIPE_WINDING_x */ 95 unsigned fill_cw:2; /**< PIPE_POLYGON_MODE_x */ 96 unsigned fill_ccw:2; /**< PIPE_POLYGON_MODE_x */ 97 unsigned offset_cw:1; 98 unsigned offset_ccw:1; 99 unsigned scissor:1; 100 unsigned poly_smooth:1; 101 unsigned poly_stipple_enable:1; 102 unsigned point_smooth:1; 103 unsigned point_sprite:1; 104 unsigned point_size_per_vertex:1; /**< size computed in vertex shader */ 105 unsigned multisample:1; /* XXX maybe more ms state in future */ 106 unsigned line_smooth:1; 107 unsigned line_stipple_enable:1; 108 unsigned line_stipple_factor:8; /**< [1..256] actually */ 109 unsigned line_stipple_pattern:16; 110 unsigned line_last_pixel:1; 111 unsigned bypass_clipping:1; 112 unsigned bypass_vs:1; /**< Skip the vertex shader. Note that the shader is 113 still needed though, to indicate inputs/outputs */ 114 unsigned origin_lower_left:1; /**< Is (0,0) the lower-left corner? */ 115 unsigned flatshade_first:1; /**< take color attribute from the first vertex of a primitive */ 116 unsigned gl_rasterization_rules:1; /**< enable tweaks for GL rasterization? */ 117 118 float line_width; 119 float point_size; /**< used when no per-vertex size */ 120 float point_size_min; /* XXX - temporary, will go away */ 121 float point_size_max; /* XXX - temporary, will go away */ 122 float offset_units; 123 float offset_scale; 124 ubyte sprite_coord_mode[PIPE_MAX_SHADER_OUTPUTS]; /**< PIPE_SPRITE_COORD_ */ 125}; 126 127 128struct pipe_poly_stipple 129{ 130 unsigned stipple[32]; 131}; 132 133 134struct pipe_viewport_state 135{ 136 float scale[4]; 137 float translate[4]; 138}; 139 140 141struct pipe_scissor_state 142{ 143 unsigned minx:16; 144 unsigned miny:16; 145 unsigned maxx:16; 146 unsigned maxy:16; 147}; 148 149 150struct pipe_clip_state 151{ 152 float ucp[PIPE_MAX_CLIP_PLANES][4]; 153 unsigned nr; 154}; 155 156 157/** 158 * Constants for vertex/fragment shaders 159 */ 160struct pipe_constant_buffer 161{ 162 struct pipe_buffer *buffer; 163 unsigned size; /** in bytes (XXX: redundant!) */ 164}; 165 166 167struct pipe_shader_state 168{ 169 const struct tgsi_token *tokens; 170}; 171 172 173struct pipe_depth_stencil_alpha_state 174{ 175 struct { 176 unsigned enabled:1; /**< depth test enabled? */ 177 unsigned writemask:1; /**< allow depth buffer writes? */ 178 unsigned func:3; /**< depth test func (PIPE_FUNC_x) */ 179 unsigned occlusion_count:1; /**< do occlusion counting? */ 180 } depth; 181 struct { 182 unsigned enabled:1; /**< stencil[0]: stencil enabled, stencil[1]: two-side enabled */ 183 unsigned func:3; /**< PIPE_FUNC_x */ 184 unsigned fail_op:3; /**< PIPE_STENCIL_OP_x */ 185 unsigned zpass_op:3; /**< PIPE_STENCIL_OP_x */ 186 unsigned zfail_op:3; /**< PIPE_STENCIL_OP_x */ 187 ubyte ref_value; 188 ubyte value_mask; 189 ubyte write_mask; 190 } stencil[2]; /**< [0] = front, [1] = back */ 191 struct { 192 unsigned enabled:1; 193 unsigned func:3; /**< PIPE_FUNC_x */ 194 float ref; /**< reference value */ 195 } alpha; 196}; 197 198 199struct pipe_blend_state 200{ 201 unsigned blend_enable:1; 202 203 unsigned rgb_func:3; /**< PIPE_BLEND_x */ 204 unsigned rgb_src_factor:5; /**< PIPE_BLENDFACTOR_x */ 205 unsigned rgb_dst_factor:5; /**< PIPE_BLENDFACTOR_x */ 206 207 unsigned alpha_func:3; /**< PIPE_BLEND_x */ 208 unsigned alpha_src_factor:5; /**< PIPE_BLENDFACTOR_x */ 209 unsigned alpha_dst_factor:5; /**< PIPE_BLENDFACTOR_x */ 210 211 unsigned logicop_enable:1; 212 unsigned logicop_func:4; /**< PIPE_LOGICOP_x */ 213 214 unsigned colormask:4; /**< bitmask of PIPE_MASK_R/G/B/A */ 215 unsigned dither:1; 216}; 217 218 219struct pipe_blend_color 220{ 221 float color[4]; 222}; 223 224 225struct pipe_framebuffer_state 226{ 227 unsigned width, height; 228 229 /** multiple colorbuffers for multiple render targets */ 230 unsigned num_cbufs; 231 struct pipe_surface *cbufs[PIPE_MAX_COLOR_BUFS]; 232 233 struct pipe_surface *zsbuf; /**< Z/stencil buffer */ 234}; 235 236 237/** 238 * Texture sampler state. 239 */ 240struct pipe_sampler_state 241{ 242 unsigned wrap_s:3; /**< PIPE_TEX_WRAP_x */ 243 unsigned wrap_t:3; /**< PIPE_TEX_WRAP_x */ 244 unsigned wrap_r:3; /**< PIPE_TEX_WRAP_x */ 245 unsigned min_img_filter:2; /**< PIPE_TEX_FILTER_x */ 246 unsigned min_mip_filter:2; /**< PIPE_TEX_MIPFILTER_x */ 247 unsigned mag_img_filter:2; /**< PIPE_TEX_FILTER_x */ 248 unsigned compare_mode:1; /**< PIPE_TEX_COMPARE_x */ 249 unsigned compare_func:3; /**< PIPE_FUNC_x */ 250 unsigned normalized_coords:1; /**< Are coords normalized to [0,1]? */ 251 unsigned prefilter:4; /**< Wierd sampling state exposed by some api's */ 252 float shadow_ambient; /**< shadow test fail color/intensity */ 253 float lod_bias; /**< LOD/lambda bias */ 254 float min_lod, max_lod; /**< LOD clamp range, after bias */ 255 float border_color[4]; 256 float max_anisotropy; 257}; 258 259 260/** 261 * 2D surface. This is basically a view into a memory buffer. 262 * May be a renderbuffer, texture mipmap level, etc. 263 */ 264struct pipe_surface 265{ 266 struct pipe_buffer *buffer; /**< surface's buffer/memory */ 267 enum pipe_format format; /**< PIPE_FORMAT_x */ 268 unsigned status; /**< PIPE_SURFACE_STATUS_x */ 269 unsigned clear_value; /**< XXX may be temporary */ 270 unsigned cpp; /**< bytes per pixel */ 271 unsigned width; 272 unsigned height; 273 unsigned pitch; /**< in pixels */ 274 unsigned offset; /**< offset from start of buffer, in bytes */ 275 unsigned refcount; 276 unsigned usage; /**< PIPE_BUFFER_USAGE_* */ 277 278 struct pipe_winsys *winsys; /**< winsys which owns/created the surface */ 279 280 struct pipe_texture *texture; /**< optional texture into which this is a view */ 281 unsigned face; 282 unsigned level; 283 unsigned zslice; 284}; 285 286 287#define PIPE_TEXTURE_USAGE_RENDER_TARGET 0x1 288#define PIPE_TEXTURE_USAGE_DISPLAY_TARGET 0x2 /* ie a backbuffer */ 289#define PIPE_TEXTURE_USAGE_DEPTH_STENCIL 0x4 290#define PIPE_TEXTURE_USAGE_SAMPLER 0x8 291 292/** 293 * Texture object. 294 */ 295struct pipe_texture 296{ 297 enum pipe_texture_target target; /**< PIPE_TEXTURE_x */ 298 enum pipe_format format; /**< PIPE_FORMAT_x */ 299 300 unsigned width[PIPE_MAX_TEXTURE_LEVELS]; 301 unsigned height[PIPE_MAX_TEXTURE_LEVELS]; 302 unsigned depth[PIPE_MAX_TEXTURE_LEVELS]; 303 304 unsigned cpp:8; 305 unsigned last_level:8; /**< Index of last mipmap level present/defined */ 306 unsigned compressed:1; 307 308 unsigned tex_usage; /* PIPE_TEXTURE_USAGE_* */ 309 310 /* These are also refcounted: 311 */ 312 unsigned refcount; 313 314 struct pipe_screen *screen; /**< screen that this texture belongs to */ 315}; 316 317 318/** 319 * A vertex buffer. Typically, all the vertex data/attributes for 320 * drawing something will be in one buffer. But it's also possible, for 321 * example, to put colors in one buffer and texcoords in another. 322 */ 323struct pipe_vertex_buffer 324{ 325 unsigned pitch; /**< stride to same attrib in next vertex, in bytes */ 326 unsigned max_index; /**< number of vertices in this buffer */ 327 unsigned buffer_offset; /**< offset to start of data in buffer, in bytes */ 328 struct pipe_buffer *buffer; /**< the actual buffer */ 329}; 330 331 332/** 333 * Information to describe a vertex attribute (position, color, etc) 334 */ 335struct pipe_vertex_element 336{ 337 /** Offset of this attribute, in bytes, from the start of the vertex */ 338 unsigned src_offset; 339 340 /** Which vertex_buffer (as given to pipe->set_vertex_buffer()) does 341 * this attribute live in? 342 */ 343 unsigned vertex_buffer_index:8; 344 unsigned nr_components:8; 345 346 enum pipe_format src_format; /**< PIPE_FORMAT_* */ 347}; 348 349 350#ifdef __cplusplus 351} 352#endif 353 354#endif 355