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Diffstat (limited to 'src/gallium/drivers/i965simple/brw_clip_line.c')
-rw-r--r--src/gallium/drivers/i965simple/brw_clip_line.c245
1 files changed, 0 insertions, 245 deletions
diff --git a/src/gallium/drivers/i965simple/brw_clip_line.c b/src/gallium/drivers/i965simple/brw_clip_line.c
deleted file mode 100644
index 75d9e5fcda..0000000000
--- a/src/gallium/drivers/i965simple/brw_clip_line.c
+++ /dev/null
@@ -1,245 +0,0 @@
-/*
- Copyright (C) Intel Corp. 2006. All Rights Reserved.
- Intel funded Tungsten Graphics (http://www.tungstengraphics.com) to
- develop this 3D driver.
-
- Permission is hereby granted, free of charge, to any person obtaining
- a copy of this software and associated documentation files (the
- "Software"), to deal in the Software without restriction, including
- without limitation the rights to use, copy, modify, merge, publish,
- distribute, sublicense, and/or sell copies of the Software, and to
- permit persons to whom the Software is furnished to do so, subject to
- the following conditions:
-
- The above copyright notice and this permission notice (including the
- next paragraph) shall be included in all copies or substantial
- portions of the Software.
-
- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
- IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
- LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
- OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
- **********************************************************************/
- /*
- * Authors:
- * Keith Whitwell <keith@tungstengraphics.com>
- */
-
-#include "brw_defines.h"
-#include "brw_context.h"
-#include "brw_eu.h"
-#include "brw_util.h"
-#include "brw_clip.h"
-
-
-
-static void brw_clip_line_alloc_regs( struct brw_clip_compile *c )
-{
- unsigned i = 0,j;
-
- /* Register usage is static, precompute here:
- */
- c->reg.R0 = retype(brw_vec8_grf(i, 0), BRW_REGISTER_TYPE_UD); i++;
-
- if (c->key.nr_userclip) {
- c->reg.fixed_planes = brw_vec4_grf(i, 0);
- i += (6 + c->key.nr_userclip + 1) / 2;
-
- c->prog_data.curb_read_length = (6 + c->key.nr_userclip + 1) / 2;
- }
- else
- c->prog_data.curb_read_length = 0;
-
-
- /* Payload vertices plus space for more generated vertices:
- */
- for (j = 0; j < 4; j++) {
- c->reg.vertex[j] = brw_vec4_grf(i, 0);
- i += c->nr_regs;
- }
-
- c->reg.t = brw_vec1_grf(i, 0);
- c->reg.t0 = brw_vec1_grf(i, 1);
- c->reg.t1 = brw_vec1_grf(i, 2);
- c->reg.planemask = retype(brw_vec1_grf(i, 3), BRW_REGISTER_TYPE_UD);
- c->reg.plane_equation = brw_vec4_grf(i, 4);
- i++;
-
- c->reg.dp0 = brw_vec1_grf(i, 0); /* fixme - dp4 will clobber r.1,2,3 */
- c->reg.dp1 = brw_vec1_grf(i, 4);
- i++;
-
- if (!c->key.nr_userclip) {
- c->reg.fixed_planes = brw_vec8_grf(i, 0);
- i++;
- }
-
-
- c->first_tmp = i;
- c->last_tmp = i;
-
- c->prog_data.urb_read_length = c->nr_regs; /* ? */
- c->prog_data.total_grf = i;
-}
-
-
-
-/* Line clipping, more or less following the following algorithm:
- *
- * for (p=0;p<MAX_PLANES;p++) {
- * if (clipmask & (1 << p)) {
- * float dp0 = DOTPROD( vtx0, plane[p] );
- * float dp1 = DOTPROD( vtx1, plane[p] );
- *
- * if (IS_NEGATIVE(dp1)) {
- * float t = dp1 / (dp1 - dp0);
- * if (t > t1) t1 = t;
- * } else {
- * float t = dp0 / (dp0 - dp1);
- * if (t > t0) t0 = t;
- * }
- *
- * if (t0 + t1 >= 1.0)
- * return;
- * }
- * }
- *
- * interp( ctx, newvtx0, vtx0, vtx1, t0 );
- * interp( ctx, newvtx1, vtx1, vtx0, t1 );
- *
- */
-static void clip_and_emit_line( struct brw_clip_compile *c )
-{
- struct brw_compile *p = &c->func;
- struct brw_indirect vtx0 = brw_indirect(0, 0);
- struct brw_indirect vtx1 = brw_indirect(1, 0);
- struct brw_indirect newvtx0 = brw_indirect(2, 0);
- struct brw_indirect newvtx1 = brw_indirect(3, 0);
- struct brw_indirect plane_ptr = brw_indirect(4, 0);
- struct brw_instruction *plane_loop;
- struct brw_instruction *plane_active;
- struct brw_instruction *is_negative;
- struct brw_instruction *is_neg2;
- struct brw_instruction *not_culled;
- struct brw_reg v1_null_ud = retype(vec1(brw_null_reg()), BRW_REGISTER_TYPE_UD);
-
- brw_MOV(p, get_addr_reg(vtx0), brw_address(c->reg.vertex[0]));
- brw_MOV(p, get_addr_reg(vtx1), brw_address(c->reg.vertex[1]));
- brw_MOV(p, get_addr_reg(newvtx0), brw_address(c->reg.vertex[2]));
- brw_MOV(p, get_addr_reg(newvtx1), brw_address(c->reg.vertex[3]));
- brw_MOV(p, get_addr_reg(plane_ptr), brw_clip_plane0_address(c));
-
- /* Note: init t0, t1 together:
- */
- brw_MOV(p, vec2(c->reg.t0), brw_imm_f(0));
-
- brw_clip_init_planes(c);
- brw_clip_init_clipmask(c);
-
- /* -ve rhw workaround */
- brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ);
- brw_AND(p, brw_null_reg(), get_element_ud(c->reg.R0, 2),
- brw_imm_ud(1<<20));
- brw_OR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud(0x3f));
- brw_set_predicate_control(p, BRW_PREDICATE_NONE);
-
- plane_loop = brw_DO(p, BRW_EXECUTE_1);
- {
- /* if (planemask & 1)
- */
- brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ);
- brw_AND(p, v1_null_ud, c->reg.planemask, brw_imm_ud(1));
-
- plane_active = brw_IF(p, BRW_EXECUTE_1);
- {
- if (c->key.nr_userclip)
- brw_MOV(p, c->reg.plane_equation, deref_4f(plane_ptr, 0));
- else
- brw_MOV(p, c->reg.plane_equation, deref_4b(plane_ptr, 0));
-
-#if 0
- /* dp = DP4(vtx->position, plane)
- */
- brw_DP4(p, vec4(c->reg.dp0), deref_4f(vtx0, c->offset[VERT_RESULT_HPOS]), c->reg.plane_equation);
-
- /* if (IS_NEGATIVE(dp1))
- */
- brw_set_conditionalmod(p, BRW_CONDITIONAL_L);
- brw_DP4(p, vec4(c->reg.dp1), deref_4f(vtx1, c->offset[VERT_RESULT_HPOS]), c->reg.plane_equation);
-#else
- #warning "disabled"
-#endif
- is_negative = brw_IF(p, BRW_EXECUTE_1);
- {
- brw_ADD(p, c->reg.t, c->reg.dp1, negate(c->reg.dp0));
- brw_math_invert(p, c->reg.t, c->reg.t);
- brw_MUL(p, c->reg.t, c->reg.t, c->reg.dp1);
-
- brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_G, c->reg.t, c->reg.t1 );
- brw_MOV(p, c->reg.t1, c->reg.t);
- brw_set_predicate_control(p, BRW_PREDICATE_NONE);
- }
- is_negative = brw_ELSE(p, is_negative);
- {
- /* Coming back in. We know that both cannot be negative
- * because the line would have been culled in that case.
- */
-
- /* If both are positive, do nothing */
- brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_L, c->reg.dp0, brw_imm_f(0.0));
- is_neg2 = brw_IF(p, BRW_EXECUTE_1);
- {
- brw_ADD(p, c->reg.t, c->reg.dp0, negate(c->reg.dp1));
- brw_math_invert(p, c->reg.t, c->reg.t);
- brw_MUL(p, c->reg.t, c->reg.t, c->reg.dp0);
-
- brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_G, c->reg.t, c->reg.t0 );
- brw_MOV(p, c->reg.t0, c->reg.t);
- brw_set_predicate_control(p, BRW_PREDICATE_NONE);
- }
- brw_ENDIF(p, is_neg2);
- }
- brw_ENDIF(p, is_negative);
- }
- brw_ENDIF(p, plane_active);
-
- /* plane_ptr++;
- */
- brw_ADD(p, get_addr_reg(plane_ptr), get_addr_reg(plane_ptr), brw_clip_plane_stride(c));
-
- /* while (planemask>>=1) != 0
- */
- brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ);
- brw_SHR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud(1));
- }
- brw_WHILE(p, plane_loop);
-
- brw_ADD(p, c->reg.t, c->reg.t0, c->reg.t1);
- brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_L, c->reg.t, brw_imm_f(1.0));
- not_culled = brw_IF(p, BRW_EXECUTE_1);
- {
- brw_clip_interp_vertex(c, newvtx0, vtx0, vtx1, c->reg.t0, FALSE);
- brw_clip_interp_vertex(c, newvtx1, vtx1, vtx0, c->reg.t1, FALSE);
-
- brw_clip_emit_vue(c, newvtx0, 1, 0, (_3DPRIM_LINESTRIP << 2) | R02_PRIM_START);
- brw_clip_emit_vue(c, newvtx1, 0, 1, (_3DPRIM_LINESTRIP << 2) | R02_PRIM_END);
- }
- brw_ENDIF(p, not_culled);
- brw_clip_kill_thread(c);
-}
-
-
-
-void brw_emit_line_clip( struct brw_clip_compile *c )
-{
- brw_clip_line_alloc_regs(c);
-
- if (c->key.do_flat_shading)
- brw_clip_copy_colors(c, 0, 1);
-
- clip_and_emit_line(c);
-}
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