draw_context.c revision 507fbe2d327efb8d608ce8e07436b97321560808
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 * Authors: 30 * Keith Whitwell <keith@tungstengraphics.com> 31 */ 32 33 34#include "pipe/p_util.h" 35#include "draw_context.h" 36#include "draw_vbuf.h" 37#include "draw_vs.h" 38#include "draw_pt.h" 39#include "draw_pipe.h" 40 41 42struct draw_context *draw_create( void ) 43{ 44 struct draw_context *draw = CALLOC_STRUCT( draw_context ); 45 if (draw == NULL) 46 goto fail; 47 48#if defined(__i386__) || defined(__386__) 49 draw->use_sse = GETENV( "GALLIUM_NOSSE" ) == NULL; 50#else 51 draw->use_sse = FALSE; 52#endif 53 54 ASSIGN_4V( draw->plane[0], -1, 0, 0, 1 ); 55 ASSIGN_4V( draw->plane[1], 1, 0, 0, 1 ); 56 ASSIGN_4V( draw->plane[2], 0, -1, 0, 1 ); 57 ASSIGN_4V( draw->plane[3], 0, 1, 0, 1 ); 58 ASSIGN_4V( draw->plane[4], 0, 0, 1, 1 ); /* yes these are correct */ 59 ASSIGN_4V( draw->plane[5], 0, 0, -1, 1 ); /* mesa's a bit wonky */ 60 draw->nr_planes = 6; 61 62 63 draw->reduced_prim = ~0; /* != any of PIPE_PRIM_x */ 64 65 draw_set_mapped_element_buffer( draw, 0, NULL ); 66 67 tgsi_exec_machine_init(&draw->machine); 68 69 /* FIXME: give this machine thing a proper constructor: 70 */ 71 draw->machine.Inputs = align_malloc(PIPE_MAX_ATTRIBS * sizeof(struct tgsi_exec_vector), 16); 72 draw->machine.Outputs = align_malloc(PIPE_MAX_ATTRIBS * sizeof(struct tgsi_exec_vector), 16); 73 74 if (!draw_pipeline_init( draw )) 75 goto fail; 76 77 if (!draw_pt_init( draw )) 78 goto fail; 79 80 return draw; 81 82fail: 83 draw_destroy( draw ); 84 return NULL; 85} 86 87 88void draw_destroy( struct draw_context *draw ) 89{ 90 if (!draw) 91 return; 92 93 94 if (draw->machine.Inputs) 95 align_free(draw->machine.Inputs); 96 97 if (draw->machine.Outputs) 98 align_free(draw->machine.Outputs); 99 100 tgsi_exec_machine_free_data(&draw->machine); 101 102 /* Not so fast -- we're just borrowing this at the moment. 103 * 104 if (draw->render) 105 draw->render->destroy( draw->render ); 106 */ 107 108 draw_pipeline_destroy( draw ); 109 draw_pt_destroy( draw ); 110 111 FREE( draw ); 112} 113 114 115 116void draw_flush( struct draw_context *draw ) 117{ 118 draw_do_flush( draw, DRAW_FLUSH_BACKEND ); 119} 120 121 122 123/** 124 * Register new primitive rasterization/rendering state. 125 * This causes the drawing pipeline to be rebuilt. 126 */ 127void draw_set_rasterizer_state( struct draw_context *draw, 128 const struct pipe_rasterizer_state *raster ) 129{ 130 draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); 131 132 draw->rasterizer = raster; 133} 134 135 136/** 137 * Plug in the primitive rendering/rasterization stage (which is the last 138 * stage in the drawing pipeline). 139 * This is provided by the device driver. 140 */ 141void draw_set_rasterize_stage( struct draw_context *draw, 142 struct draw_stage *stage ) 143{ 144 draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); 145 146 draw->pipeline.rasterize = stage; 147} 148 149 150/** 151 * Set the draw module's clipping state. 152 */ 153void draw_set_clip_state( struct draw_context *draw, 154 const struct pipe_clip_state *clip ) 155{ 156 draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); 157 158 assert(clip->nr <= PIPE_MAX_CLIP_PLANES); 159 memcpy(&draw->plane[6], clip->ucp, clip->nr * sizeof(clip->ucp[0])); 160 draw->nr_planes = 6 + clip->nr; 161} 162 163 164/** 165 * Set the draw module's viewport state. 166 */ 167void draw_set_viewport_state( struct draw_context *draw, 168 const struct pipe_viewport_state *viewport ) 169{ 170 draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); 171 draw->viewport = *viewport; /* struct copy */ 172 draw->identity_viewport = (viewport->scale[0] == 1.0f && 173 viewport->scale[1] == 1.0f && 174 viewport->scale[2] == 1.0f && 175 viewport->scale[3] == 1.0f && 176 viewport->translate[0] == 0.0f && 177 viewport->translate[1] == 0.0f && 178 viewport->translate[2] == 0.0f && 179 viewport->translate[3] == 0.0f); 180} 181 182 183 184void 185draw_set_vertex_buffers(struct draw_context *draw, 186 unsigned count, 187 const struct pipe_vertex_buffer *buffers) 188{ 189 assert(count <= PIPE_MAX_ATTRIBS); 190 191 memcpy(draw->vertex_buffer, buffers, count * sizeof(buffers[0])); 192 draw->nr_vertex_buffers = count; 193} 194 195 196void 197draw_set_vertex_elements(struct draw_context *draw, 198 unsigned count, 199 const struct pipe_vertex_element *elements) 200{ 201 assert(count <= PIPE_MAX_ATTRIBS); 202 203 memcpy(draw->vertex_element, elements, count * sizeof(elements[0])); 204 draw->nr_vertex_elements = count; 205} 206 207 208/** 209 * Tell drawing context where to find mapped vertex buffers. 210 */ 211void 212draw_set_mapped_vertex_buffer(struct draw_context *draw, 213 unsigned attr, const void *buffer) 214{ 215 draw->user.vbuffer[attr] = buffer; 216} 217 218 219void 220draw_set_mapped_constant_buffer(struct draw_context *draw, 221 const void *buffer) 222{ 223 draw->user.constants = buffer; 224} 225 226 227/** 228 * Tells the draw module to draw points with triangles if their size 229 * is greater than this threshold. 230 */ 231void 232draw_wide_point_threshold(struct draw_context *draw, float threshold) 233{ 234 draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); 235 draw->pipeline.wide_point_threshold = threshold; 236} 237 238 239/** 240 * Tells the draw module to draw lines with triangles if their width 241 * is greater than this threshold. 242 */ 243void 244draw_wide_line_threshold(struct draw_context *draw, float threshold) 245{ 246 draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); 247 draw->pipeline.wide_line_threshold = threshold; 248} 249 250 251/** 252 * Tells the draw module whether or not to implement line stipple. 253 */ 254void 255draw_enable_line_stipple(struct draw_context *draw, boolean enable) 256{ 257 draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); 258 draw->pipeline.line_stipple = enable; 259} 260 261 262/** 263 * Tells draw module whether to convert points to quads for sprite mode. 264 */ 265void 266draw_enable_point_sprites(struct draw_context *draw, boolean enable) 267{ 268 draw_do_flush( draw, DRAW_FLUSH_STATE_CHANGE ); 269 draw->pipeline.point_sprite = enable; 270} 271 272 273/** 274 * Ask the draw module for the location/slot of the given vertex attribute in 275 * a post-transformed vertex. 276 * 277 * With this function, drivers that use the draw module should have no reason 278 * to track the current vertex shader. 279 * 280 * Note that the draw module may sometimes generate vertices with extra 281 * attributes (such as texcoords for AA lines). The driver can call this 282 * function to find those attributes. 283 * 284 * Zero is returned if the attribute is not found since this is 285 * a don't care / undefined situtation. Returning -1 would be a bit more 286 * work for the drivers. 287 */ 288int 289draw_find_vs_output(struct draw_context *draw, 290 uint semantic_name, uint semantic_index) 291{ 292 const struct draw_vertex_shader *vs = draw->vertex_shader; 293 uint i; 294 for (i = 0; i < vs->info.num_outputs; i++) { 295 if (vs->info.output_semantic_name[i] == semantic_name && 296 vs->info.output_semantic_index[i] == semantic_index) 297 return i; 298 } 299 300 /* XXX there may be more than one extra vertex attrib. 301 * For example, simulated gl_FragCoord and gl_PointCoord. 302 */ 303 if (draw->extra_vp_outputs.semantic_name == semantic_name && 304 draw->extra_vp_outputs.semantic_index == semantic_index) { 305 return draw->extra_vp_outputs.slot; 306 } 307 return 0; 308} 309 310 311/** 312 * Return number of vertex shader outputs. 313 */ 314uint 315draw_num_vs_outputs(struct draw_context *draw) 316{ 317 uint count = draw->vertex_shader->info.num_outputs; 318 if (draw->extra_vp_outputs.slot > 0) 319 count++; 320 return count; 321} 322 323 324 325boolean draw_use_sse(struct draw_context *draw) 326{ 327 return (boolean) draw->use_sse; 328} 329 330 331void draw_set_render( struct draw_context *draw, 332 struct vbuf_render *render ) 333{ 334 draw->render = render; 335} 336 337void draw_set_edgeflags( struct draw_context *draw, 338 const unsigned *edgeflag ) 339{ 340 draw->user.edgeflag = edgeflag; 341} 342 343 344boolean draw_get_edgeflag( struct draw_context *draw, 345 unsigned idx ) 346{ 347 if (draw->user.edgeflag) 348 return (draw->user.edgeflag[idx/32] & (1 << (idx%32))) != 0; 349 else 350 return 1; 351} 352 353 354/** 355 * Tell the drawing context about the index/element buffer to use 356 * (ala glDrawElements) 357 * If no element buffer is to be used (i.e. glDrawArrays) then this 358 * should be called with eltSize=0 and elements=NULL. 359 * 360 * \param draw the drawing context 361 * \param eltSize size of each element (1, 2 or 4 bytes) 362 * \param elements the element buffer ptr 363 */ 364void 365draw_set_mapped_element_buffer( struct draw_context *draw, 366 unsigned eltSize, void *elements ) 367{ 368 draw->user.elts = elements; 369 draw->user.eltSize = eltSize; 370} 371 372 373 374/* Revamp me please: 375 */ 376void draw_do_flush( struct draw_context *draw, unsigned flags ) 377{ 378 if (!draw->flushing) 379 { 380 draw->flushing = TRUE; 381 382 if (flags >= DRAW_FLUSH_STATE_CHANGE) { 383 draw->pipeline.first->flush( draw->pipeline.first, flags ); 384 draw->pipeline.first = draw->pipeline.validate; 385 draw->reduced_prim = ~0; /* is reduced_prim needed any more? */ 386 } 387 388 draw->flushing = FALSE; 389 } 390} 391