1f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org/************************************************************************** 2f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 3f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Copyright 2010, VMware, inc. 4f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * All Rights Reserved. 5f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 6f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * Permission is hereby granted, free of charge, to any person obtaining a 7f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * copy of this software and associated documentation files (the 8f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * "Software"), to deal in the Software without restriction, including 9f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * without limitation the rights to use, copy, modify, merge, publish, 10f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * distribute, sub license, and/or sell copies of the Software, and to 11f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * permit persons to whom the Software is furnished to do so, subject to 12f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * the following conditions: 13f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 14f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * The above copyright notice and this permission notice (including the 15f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * next paragraph) shall be included in all copies or substantial portions 16f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * of the Software. 17f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 18f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 19f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 21f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR 22f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 23f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 24f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * 26f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org **************************************************************************/ 27f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 28f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 29f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 30f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.orgstatic boolean TAG(do_cliptest)( struct pt_post_vs *pvs, 31f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org struct draw_vertex_info *info ) 32f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org{ 33f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org struct vertex_header *out = info->verts; 34f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const float *scale = pvs->draw->viewport.scale; 35f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const float *trans = pvs->draw->viewport.translate; 36f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* const */ float (*plane)[4] = pvs->draw->plane; 37f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const unsigned pos = draw_current_shader_position_output(pvs->draw); 38f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const unsigned cv = draw_current_shader_clipvertex_output(pvs->draw); 39f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org unsigned cd[2]; 40f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const unsigned ef = pvs->draw->vs.edgeflag_output; 41f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const unsigned ucp_enable = pvs->draw->rasterizer->clip_plane_enable; 42f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const unsigned flags = (FLAGS); 43f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org unsigned need_pipeline = 0; 44f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org unsigned j; 45f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org unsigned i; 46f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org bool have_cd = false; 47f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org cd[0] = draw_current_shader_clipdistance_output(pvs->draw, 0); 48f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org cd[1] = draw_current_shader_clipdistance_output(pvs->draw, 1); 49f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 50f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (cd[0] != pos || cd[1] != pos) 51f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org have_cd = true; 52f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 53f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org for (j = 0; j < info->count; j++) { 54f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org float *position = out->data[pos]; 55f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org unsigned mask = 0x0; 56f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 57f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org initialize_vertex_header(out); 58f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 59f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (flags & (DO_CLIP_XY | DO_CLIP_XY_GUARD_BAND | 60f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org DO_CLIP_FULL_Z | DO_CLIP_HALF_Z | DO_CLIP_USER)) { 61f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org float *clipvertex = position; 62f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 63f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if ((flags & DO_CLIP_USER) && cv != pos) 64f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org clipvertex = out->data[cv]; 65f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 66f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org for (i = 0; i < 4; i++) { 67f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org out->clip[i] = clipvertex[i]; 68f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org out->pre_clip_pos[i] = position[i]; 69f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 70f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 71f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* Do the hardwired planes first: 72f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 73f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (flags & DO_CLIP_XY_GUARD_BAND) { 74f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (-0.50 * position[0] + position[3] < 0) mask |= (1<<0); 75f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if ( 0.50 * position[0] + position[3] < 0) mask |= (1<<1); 76f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (-0.50 * position[1] + position[3] < 0) mask |= (1<<2); 77f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if ( 0.50 * position[1] + position[3] < 0) mask |= (1<<3); 78f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 79f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org else if (flags & DO_CLIP_XY) { 80f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (-position[0] + position[3] < 0) mask |= (1<<0); 81f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if ( position[0] + position[3] < 0) mask |= (1<<1); 82f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (-position[1] + position[3] < 0) mask |= (1<<2); 83f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if ( position[1] + position[3] < 0) mask |= (1<<3); 84f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 85f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 86f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* Clip Z planes according to full cube, half cube or none. 87f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 88f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (flags & DO_CLIP_FULL_Z) { 89f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if ( position[2] + position[3] < 0) mask |= (1<<4); 90f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (-position[2] + position[3] < 0) mask |= (1<<5); 91f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 92f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org else if (flags & DO_CLIP_HALF_Z) { 93f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if ( position[2] < 0) mask |= (1<<4); 94f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (-position[2] + position[3] < 0) mask |= (1<<5); 95f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 96f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 97f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (flags & DO_CLIP_USER) { 98f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org unsigned ucp_mask = ucp_enable; 99f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org int num_written_clipdistance = pvs->draw->vs.vertex_shader->info.num_written_clipdistance; 100f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org while (ucp_mask) { 101f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org unsigned plane_idx = ffs(ucp_mask)-1; 102f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org ucp_mask &= ~(1 << plane_idx); 103f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org plane_idx += 6; 104f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 105f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* 106f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * for user clipping check if we have a clip distance output 107f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * and the shader has written to it, otherwise use clipvertex 108f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org * to decide when the plane is clipping. 109f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org */ 110f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (have_cd && num_written_clipdistance) { 111f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org float clipdist; 112f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org i = plane_idx - 6; 113f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org out->have_clipdist = 1; 114f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* first four clip distance in first vector etc. */ 115f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (i < 4) 116f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org clipdist = out->data[cd[0]][i]; 117f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org else 118f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org clipdist = out->data[cd[1]][i-4]; 119f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (clipdist < 0) 120f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org mask |= 1 << plane_idx; 121f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } else { 122f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if (dot4(clipvertex, plane[plane_idx]) < 0) 123f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org mask |= 1 << plane_idx; 124f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 125f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 126f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 127f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 128f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org out->clipmask = mask; 129f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org need_pipeline |= out->clipmask; 130f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 131f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 132f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if ((flags & DO_VIEWPORT) && mask == 0) 133f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org { 134f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* divide by w */ 135f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org float w = 1.0f / position[3]; 136f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 137f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org /* Viewport mapping */ 138f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org position[0] = position[0] * w * scale[0] + trans[0]; 139f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org position[1] = position[1] * w * scale[1] + trans[1]; 140f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org position[2] = position[2] * w * scale[2] + trans[2]; 141f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org position[3] = w; 142f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 143f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 144f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org if ((flags & DO_EDGEFLAG) && ef) { 145f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org const float *edgeflag = out->data[ef]; 146f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org out->edgeflag = !(edgeflag[0] != 1.0f); 147f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org need_pipeline |= !out->edgeflag; 148f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 149f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 150f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org out = (struct vertex_header *)( (char *)out + info->stride ); 151f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org } 152f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 153f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org return need_pipeline != 0; 154f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org} 155f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 156f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org 157f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#undef FLAGS 158f2ba7591b1407a7ee9209f842c50696914dc2dedkbr@chromium.org#undef TAG 159