2 Copyright (C) Intel Corp. 2006. All Rights Reserved.
3 Intel funded Tungsten Graphics to
4 develop this 3D driver.
6 Permission is hereby granted, free of charge, to any person obtaining
7 a 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, sublicense, 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:
14 The above copyright notice and this permission notice (including the
15 next paragraph) shall be included in all copies or substantial
16 portions of the Software.
18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
21 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **********************************************************************/
29 * Keith Whitwell <keithw@vmware.com>
32 #include "main/macros.h"
33 #include "main/enums.h"
35 #include "intel_batchbuffer.h"
37 #include "brw_defines.h"
38 #include "brw_context.h"
41 #include "brw_state.h"
44 #include "util/ralloc.h"
46 #define FRONT_UNFILLED_BIT 0x1
47 #define BACK_UNFILLED_BIT 0x2
50 static void compile_clip_prog( struct brw_context
*brw
,
51 struct brw_clip_prog_key
*key
)
53 struct brw_clip_compile c
;
54 const GLuint
*program
;
58 memset(&c
, 0, sizeof(c
));
60 mem_ctx
= ralloc_context(NULL
);
62 /* Begin the compilation:
64 brw_init_codegen(brw
->intelScreen
->devinfo
, &c
.func
, mem_ctx
);
66 c
.func
.single_program_flow
= 1;
69 c
.vue_map
= brw
->vue_map_geom_out
;
72 brw_any_flat_varyings(&key
->interpolation_mode
);
73 c
.has_noperspective_shading
=
74 brw_any_noperspective_varyings(&key
->interpolation_mode
);
76 /* nr_regs is the number of registers filled by reading data from the VUE.
77 * This program accesses the entire VUE, so nr_regs needs to be the size of
78 * the VUE (measured in pairs, since two slots are stored in each
81 c
.nr_regs
= (c
.vue_map
.num_slots
+ 1)/2;
83 c
.prog_data
.clip_mode
= c
.key
.clip_mode
; /* XXX */
85 /* For some reason the thread is spawned with only 4 channels
88 brw_set_default_mask_control(&c
.func
, BRW_MASK_DISABLE
);
91 /* Would ideally have the option of producing a program which could
94 switch (key
->primitive
) {
97 brw_emit_unfilled_clip( &c
);
99 brw_emit_tri_clip( &c
);
102 brw_emit_line_clip( &c
);
105 brw_emit_point_clip( &c
);
108 unreachable("not reached");
111 brw_compact_instructions(&c
.func
, 0, 0, NULL
);
115 program
= brw_get_program(&c
.func
, &program_size
);
117 if (unlikely(INTEL_DEBUG
& DEBUG_CLIP
)) {
118 fprintf(stderr
, "clip:\n");
119 brw_disassemble(brw
->intelScreen
->devinfo
, c
.func
.store
,
120 0, program_size
, stderr
);
121 fprintf(stderr
, "\n");
124 brw_upload_cache(&brw
->cache
,
126 &c
.key
, sizeof(c
.key
),
127 program
, program_size
,
128 &c
.prog_data
, sizeof(c
.prog_data
),
129 &brw
->clip
.prog_offset
, &brw
->clip
.prog_data
);
130 ralloc_free(mem_ctx
);
133 /* Calculate interpolants for triangle and line rasterization.
136 brw_upload_clip_prog(struct brw_context
*brw
)
138 struct gl_context
*ctx
= &brw
->ctx
;
139 struct brw_clip_prog_key key
;
141 if (!brw_state_dirty(brw
,
147 BRW_NEW_INTERPOLATION_MAP
|
148 BRW_NEW_REDUCED_PRIMITIVE
|
149 BRW_NEW_VUE_MAP_GEOM_OUT
))
152 memset(&key
, 0, sizeof(key
));
157 /* BRW_NEW_INTERPOLATION_MAP */
158 key
.interpolation_mode
= brw
->interpolation_mode
;
160 /* BRW_NEW_REDUCED_PRIMITIVE */
161 key
.primitive
= brw
->reduced_primitive
;
162 /* BRW_NEW_VUE_MAP_GEOM_OUT */
163 key
.attrs
= brw
->vue_map_geom_out
.slots_valid
;
166 key
.pv_first
= (ctx
->Light
.ProvokingVertex
== GL_FIRST_VERTEX_CONVENTION
);
167 /* _NEW_TRANSFORM (also part of VUE map)*/
168 if (ctx
->Transform
.ClipPlanesEnabled
)
169 key
.nr_userclip
= _mesa_logbase2(ctx
->Transform
.ClipPlanesEnabled
) + 1;
172 key
.clip_mode
= BRW_CLIPMODE_KERNEL_CLIP
;
174 key
.clip_mode
= BRW_CLIPMODE_NORMAL
;
177 if (key
.primitive
== GL_TRIANGLES
) {
178 if (ctx
->Polygon
.CullFlag
&&
179 ctx
->Polygon
.CullFaceMode
== GL_FRONT_AND_BACK
)
180 key
.clip_mode
= BRW_CLIPMODE_REJECT_ALL
;
182 GLuint fill_front
= CLIP_CULL
;
183 GLuint fill_back
= CLIP_CULL
;
184 GLuint offset_front
= 0;
185 GLuint offset_back
= 0;
187 if (!ctx
->Polygon
.CullFlag
||
188 ctx
->Polygon
.CullFaceMode
!= GL_FRONT
) {
189 switch (ctx
->Polygon
.FrontMode
) {
191 fill_front
= CLIP_FILL
;
195 fill_front
= CLIP_LINE
;
196 offset_front
= ctx
->Polygon
.OffsetLine
;
199 fill_front
= CLIP_POINT
;
200 offset_front
= ctx
->Polygon
.OffsetPoint
;
205 if (!ctx
->Polygon
.CullFlag
||
206 ctx
->Polygon
.CullFaceMode
!= GL_BACK
) {
207 switch (ctx
->Polygon
.BackMode
) {
209 fill_back
= CLIP_FILL
;
213 fill_back
= CLIP_LINE
;
214 offset_back
= ctx
->Polygon
.OffsetLine
;
217 fill_back
= CLIP_POINT
;
218 offset_back
= ctx
->Polygon
.OffsetPoint
;
223 if (ctx
->Polygon
.BackMode
!= GL_FILL
||
224 ctx
->Polygon
.FrontMode
!= GL_FILL
) {
227 /* Most cases the fixed function units will handle. Cases where
228 * one or more polygon faces are unfilled will require help:
230 key
.clip_mode
= BRW_CLIPMODE_CLIP_NON_REJECTED
;
232 if (offset_back
|| offset_front
) {
233 /* _NEW_POLYGON, _NEW_BUFFERS */
234 key
.offset_units
= ctx
->Polygon
.OffsetUnits
* ctx
->DrawBuffer
->_MRD
* 2;
235 key
.offset_factor
= ctx
->Polygon
.OffsetFactor
* ctx
->DrawBuffer
->_MRD
;
236 key
.offset_clamp
= ctx
->Polygon
.OffsetClamp
* ctx
->DrawBuffer
->_MRD
;
239 if (!ctx
->Polygon
._FrontBit
) {
240 key
.fill_ccw
= fill_front
;
241 key
.fill_cw
= fill_back
;
242 key
.offset_ccw
= offset_front
;
243 key
.offset_cw
= offset_back
;
244 if (ctx
->Light
.Model
.TwoSide
&&
245 key
.fill_cw
!= CLIP_CULL
)
248 key
.fill_cw
= fill_front
;
249 key
.fill_ccw
= fill_back
;
250 key
.offset_cw
= offset_front
;
251 key
.offset_ccw
= offset_back
;
252 if (ctx
->Light
.Model
.TwoSide
&&
253 key
.fill_ccw
!= CLIP_CULL
)
254 key
.copy_bfc_ccw
= 1;
260 if (!brw_search_cache(&brw
->cache
, BRW_CACHE_CLIP_PROG
,
262 &brw
->clip
.prog_offset
, &brw
->clip
.prog_data
)) {
263 compile_clip_prog( brw
, &key
);