16c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell/************************************************************************** 26c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * 36c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * Copyright 2010, VMware, inc. 46c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * All Rights Reserved. 56c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * 66c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * Permission is hereby granted, free of charge, to any person obtaining a 76c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * copy of this software and associated documentation files (the 86c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * "Software"), to deal in the Software without restriction, including 96c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * without limitation the rights to use, copy, modify, merge, publish, 106c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * distribute, sub license, and/or sell copies of the Software, and to 116c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * permit persons to whom the Software is furnished to do so, subject to 126c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * the following conditions: 136c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * 146c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * The above copyright notice and this permission notice (including the 156c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * next paragraph) shall be included in all copies or substantial portions 166c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * of the Software. 176c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * 186c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 196c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 206c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 216c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 226c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 236c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 246c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 256c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell * 266c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell **************************************************************************/ 276c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 286c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 296c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 306c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwellstatic boolean TAG(do_cliptest)( struct pt_post_vs *pvs, 316c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell struct draw_vertex_info *info ) 326c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell{ 336c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell struct vertex_header *out = info->verts; 346c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell const float *scale = pvs->draw->viewport.scale; 356c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell const float *trans = pvs->draw->viewport.translate; 366c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell /* const */ float (*plane)[4] = pvs->draw->plane; 376c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell const unsigned pos = draw_current_shader_position_output(pvs->draw); 3840c5987ed84f9f0b8bb1f707bb13c1aafc39330aDave Airlie const unsigned cv = draw_current_shader_clipvertex_output(pvs->draw); 391865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie unsigned cd[2]; 406c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell const unsigned ef = pvs->draw->vs.edgeflag_output; 41dc4c821f0817a3db716f965692fb701079f66340Marek Olšák const unsigned ucp_enable = pvs->draw->rasterizer->clip_plane_enable; 426c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell const unsigned flags = (FLAGS); 436c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell unsigned need_pipeline = 0; 446c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell unsigned j; 4540c5987ed84f9f0b8bb1f707bb13c1aafc39330aDave Airlie unsigned i; 461865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie bool have_cd = false; 471865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie cd[0] = draw_current_shader_clipdistance_output(pvs->draw, 0); 481865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie cd[1] = draw_current_shader_clipdistance_output(pvs->draw, 1); 491865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie 501865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie if (cd[0] != pos || cd[1] != pos) 511865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie have_cd = true; 526c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 536c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell for (j = 0; j < info->count; j++) { 546c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell float *position = out->data[pos]; 556c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell unsigned mask = 0x0; 566c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 576c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell initialize_vertex_header(out); 586c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 594465efc3bf8d755a9afb7a4bb5382e2f5bf113e1Brian Paul if (flags & (DO_CLIP_XY | DO_CLIP_XY_GUARD_BAND | 604465efc3bf8d755a9afb7a4bb5382e2f5bf113e1Brian Paul DO_CLIP_FULL_Z | DO_CLIP_HALF_Z | DO_CLIP_USER)) { 6140c5987ed84f9f0b8bb1f707bb13c1aafc39330aDave Airlie float *clipvertex = position; 6240c5987ed84f9f0b8bb1f707bb13c1aafc39330aDave Airlie 6340c5987ed84f9f0b8bb1f707bb13c1aafc39330aDave Airlie if ((flags & DO_CLIP_USER) && cv != pos) 6440c5987ed84f9f0b8bb1f707bb13c1aafc39330aDave Airlie clipvertex = out->data[cv]; 6540c5987ed84f9f0b8bb1f707bb13c1aafc39330aDave Airlie 6640c5987ed84f9f0b8bb1f707bb13c1aafc39330aDave Airlie for (i = 0; i < 4; i++) { 6740c5987ed84f9f0b8bb1f707bb13c1aafc39330aDave Airlie out->clip[i] = clipvertex[i]; 6840c5987ed84f9f0b8bb1f707bb13c1aafc39330aDave Airlie out->pre_clip_pos[i] = position[i]; 6940c5987ed84f9f0b8bb1f707bb13c1aafc39330aDave Airlie } 706c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 716c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell /* Do the hardwired planes first: 726c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell */ 734465efc3bf8d755a9afb7a4bb5382e2f5bf113e1Brian Paul if (flags & DO_CLIP_XY_GUARD_BAND) { 744465efc3bf8d755a9afb7a4bb5382e2f5bf113e1Brian Paul if (-0.50 * position[0] + position[3] < 0) mask |= (1<<0); 754465efc3bf8d755a9afb7a4bb5382e2f5bf113e1Brian Paul if ( 0.50 * position[0] + position[3] < 0) mask |= (1<<1); 764465efc3bf8d755a9afb7a4bb5382e2f5bf113e1Brian Paul if (-0.50 * position[1] + position[3] < 0) mask |= (1<<2); 774465efc3bf8d755a9afb7a4bb5382e2f5bf113e1Brian Paul if ( 0.50 * position[1] + position[3] < 0) mask |= (1<<3); 784465efc3bf8d755a9afb7a4bb5382e2f5bf113e1Brian Paul } 794465efc3bf8d755a9afb7a4bb5382e2f5bf113e1Brian Paul else if (flags & DO_CLIP_XY) { 806c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell if (-position[0] + position[3] < 0) mask |= (1<<0); 816c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell if ( position[0] + position[3] < 0) mask |= (1<<1); 826c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell if (-position[1] + position[3] < 0) mask |= (1<<2); 836c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell if ( position[1] + position[3] < 0) mask |= (1<<3); 846c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell } 856c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 866c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell /* Clip Z planes according to full cube, half cube or none. 876c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell */ 886c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell if (flags & DO_CLIP_FULL_Z) { 896c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell if ( position[2] + position[3] < 0) mask |= (1<<4); 906c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell if (-position[2] + position[3] < 0) mask |= (1<<5); 916c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell } 926c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell else if (flags & DO_CLIP_HALF_Z) { 936c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell if ( position[2] < 0) mask |= (1<<4); 946c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell if (-position[2] + position[3] < 0) mask |= (1<<5); 956c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell } 966c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 976c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell if (flags & DO_CLIP_USER) { 98dc4c821f0817a3db716f965692fb701079f66340Marek Olšák unsigned ucp_mask = ucp_enable; 991865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie int num_written_clipdistance = pvs->draw->vs.vertex_shader->info.num_written_clipdistance; 100dc4c821f0817a3db716f965692fb701079f66340Marek Olšák while (ucp_mask) { 101dc4c821f0817a3db716f965692fb701079f66340Marek Olšák unsigned plane_idx = ffs(ucp_mask)-1; 102dc4c821f0817a3db716f965692fb701079f66340Marek Olšák ucp_mask &= ~(1 << plane_idx); 103dc4c821f0817a3db716f965692fb701079f66340Marek Olšák plane_idx += 6; 104dc4c821f0817a3db716f965692fb701079f66340Marek Olšák 1051865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie /* 1061865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie * for user clipping check if we have a clip distance output 1071865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie * and the shader has written to it, otherwise use clipvertex 1081865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie * to decide when the plane is clipping. 1091865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie */ 1101865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie if (have_cd && num_written_clipdistance) { 1111865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie float clipdist; 1121865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie i = plane_idx - 6; 1131865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie out->have_clipdist = 1; 1141865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie /* first four clip distance in first vector etc. */ 1151865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie if (i < 4) 1161865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie clipdist = out->data[cd[0]][i]; 1171865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie else 1181865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie clipdist = out->data[cd[1]][i-4]; 1191865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie if (clipdist < 0) 1201865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie mask |= 1 << plane_idx; 1211865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie } else { 1221865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie if (dot4(clipvertex, plane[plane_idx]) < 0) 1231865f341d8f45b389061fc08d2da90b7aa8a6099Dave Airlie mask |= 1 << plane_idx; 124dc4c821f0817a3db716f965692fb701079f66340Marek Olšák } 1256c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell } 1266c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell } 1276c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 1286c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell out->clipmask = mask; 1296c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell need_pipeline |= out->clipmask; 1306c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell } 1316c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 1326c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell if ((flags & DO_VIEWPORT) && mask == 0) 1336c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell { 1346c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell /* divide by w */ 1356c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell float w = 1.0f / position[3]; 1366c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 1376c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell /* Viewport mapping */ 1386c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell position[0] = position[0] * w * scale[0] + trans[0]; 1396c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell position[1] = position[1] * w * scale[1] + trans[1]; 1406c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell position[2] = position[2] * w * scale[2] + trans[2]; 1416c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell position[3] = w; 1426c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell } 1436c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 1446c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell if ((flags & DO_EDGEFLAG) && ef) { 1456c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell const float *edgeflag = out->data[ef]; 1466c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell out->edgeflag = !(edgeflag[0] != 1.0f); 1476c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell need_pipeline |= !out->edgeflag; 1486c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell } 1496c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 1506c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell out = (struct vertex_header *)( (char *)out + info->stride ); 1516c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell } 1526c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 1536c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell return need_pipeline != 0; 1546c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell} 1556c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 1566c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell 1576c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell#undef FLAGS 1586c0dc4bafbdbdc0cb4b6e5934fe064226dbd47ecKeith Whitwell#undef TAG 159