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/glheader.h"
33 #include "main/macros.h"
34 #include "main/enums.h"
36 #include "intel_batchbuffer.h"
38 #include "brw_defines.h"
39 #include "brw_context.h"
42 #include "brw_state.h"
45 #include "glsl/ralloc.h"
47 #define FRONT_UNFILLED_BIT 0x1
48 #define BACK_UNFILLED_BIT 0x2
51 static void compile_clip_prog( struct brw_context
*brw
,
52 struct brw_clip_prog_key
*key
)
54 struct brw_clip_compile c
;
55 const GLuint
*program
;
60 memset(&c
, 0, sizeof(c
));
62 mem_ctx
= ralloc_context(NULL
);
64 /* Begin the compilation:
66 brw_init_compile(brw
, &c
.func
, mem_ctx
);
68 c
.func
.single_program_flow
= 1;
71 c
.vue_map
= brw
->vue_map_geom_out
;
74 brw_any_flat_varyings(&key
->interpolation_mode
);
75 c
.has_noperspective_shading
=
76 brw_any_noperspective_varyings(&key
->interpolation_mode
);
78 /* nr_regs is the number of registers filled by reading data from the VUE.
79 * This program accesses the entire VUE, so nr_regs needs to be the size of
80 * the VUE (measured in pairs, since two slots are stored in each
83 c
.nr_regs
= (c
.vue_map
.num_slots
+ 1)/2;
85 c
.prog_data
.clip_mode
= c
.key
.clip_mode
; /* XXX */
87 /* For some reason the thread is spawned with only 4 channels
90 brw_set_mask_control(&c
.func
, BRW_MASK_DISABLE
);
93 /* Would ideally have the option of producing a program which could
96 switch (key
->primitive
) {
99 brw_emit_unfilled_clip( &c
);
101 brw_emit_tri_clip( &c
);
104 brw_emit_line_clip( &c
);
107 brw_emit_point_clip( &c
);
118 program
= brw_get_program(&c
.func
, &program_size
);
120 if (unlikely(INTEL_DEBUG
& DEBUG_CLIP
)) {
121 fprintf(stderr
, "clip:\n");
122 for (i
= 0; i
< program_size
/ sizeof(struct brw_instruction
); i
++)
123 brw_disasm(stderr
, &((struct brw_instruction
*)program
)[i
],
125 fprintf(stderr
, "\n");
128 brw_upload_cache(&brw
->cache
,
130 &c
.key
, sizeof(c
.key
),
131 program
, program_size
,
132 &c
.prog_data
, sizeof(c
.prog_data
),
133 &brw
->clip
.prog_offset
, &brw
->clip
.prog_data
);
134 ralloc_free(mem_ctx
);
137 /* Calculate interpolants for triangle and line rasterization.
140 brw_upload_clip_prog(struct brw_context
*brw
)
142 struct gl_context
*ctx
= &brw
->ctx
;
143 struct brw_clip_prog_key key
;
145 memset(&key
, 0, sizeof(key
));
150 /* BRW_NEW_INTERPOLATION_MAP */
151 key
.interpolation_mode
= brw
->interpolation_mode
;
153 /* BRW_NEW_REDUCED_PRIMITIVE */
154 key
.primitive
= brw
->reduced_primitive
;
155 /* BRW_NEW_VUE_MAP_GEOM_OUT */
156 key
.attrs
= brw
->vue_map_geom_out
.slots_valid
;
159 key
.pv_first
= (ctx
->Light
.ProvokingVertex
== GL_FIRST_VERTEX_CONVENTION
);
160 /* _NEW_TRANSFORM (also part of VUE map)*/
161 if (ctx
->Transform
.ClipPlanesEnabled
)
162 key
.nr_userclip
= _mesa_logbase2(ctx
->Transform
.ClipPlanesEnabled
) + 1;
165 key
.clip_mode
= BRW_CLIPMODE_KERNEL_CLIP
;
167 key
.clip_mode
= BRW_CLIPMODE_NORMAL
;
170 if (key
.primitive
== GL_TRIANGLES
) {
171 if (ctx
->Polygon
.CullFlag
&&
172 ctx
->Polygon
.CullFaceMode
== GL_FRONT_AND_BACK
)
173 key
.clip_mode
= BRW_CLIPMODE_REJECT_ALL
;
175 GLuint fill_front
= CLIP_CULL
;
176 GLuint fill_back
= CLIP_CULL
;
177 GLuint offset_front
= 0;
178 GLuint offset_back
= 0;
180 if (!ctx
->Polygon
.CullFlag
||
181 ctx
->Polygon
.CullFaceMode
!= GL_FRONT
) {
182 switch (ctx
->Polygon
.FrontMode
) {
184 fill_front
= CLIP_FILL
;
188 fill_front
= CLIP_LINE
;
189 offset_front
= ctx
->Polygon
.OffsetLine
;
192 fill_front
= CLIP_POINT
;
193 offset_front
= ctx
->Polygon
.OffsetPoint
;
198 if (!ctx
->Polygon
.CullFlag
||
199 ctx
->Polygon
.CullFaceMode
!= GL_BACK
) {
200 switch (ctx
->Polygon
.BackMode
) {
202 fill_back
= CLIP_FILL
;
206 fill_back
= CLIP_LINE
;
207 offset_back
= ctx
->Polygon
.OffsetLine
;
210 fill_back
= CLIP_POINT
;
211 offset_back
= ctx
->Polygon
.OffsetPoint
;
216 if (ctx
->Polygon
.BackMode
!= GL_FILL
||
217 ctx
->Polygon
.FrontMode
!= GL_FILL
) {
220 /* Most cases the fixed function units will handle. Cases where
221 * one or more polygon faces are unfilled will require help:
223 key
.clip_mode
= BRW_CLIPMODE_CLIP_NON_REJECTED
;
225 if (offset_back
|| offset_front
) {
226 /* _NEW_POLYGON, _NEW_BUFFERS */
227 key
.offset_units
= ctx
->Polygon
.OffsetUnits
* ctx
->DrawBuffer
->_MRD
* 2;
228 key
.offset_factor
= ctx
->Polygon
.OffsetFactor
* ctx
->DrawBuffer
->_MRD
;
231 switch (ctx
->Polygon
.FrontFace
) {
233 key
.fill_ccw
= fill_front
;
234 key
.fill_cw
= fill_back
;
235 key
.offset_ccw
= offset_front
;
236 key
.offset_cw
= offset_back
;
237 if (ctx
->Light
.Model
.TwoSide
&&
238 key
.fill_cw
!= CLIP_CULL
)
242 key
.fill_cw
= fill_front
;
243 key
.fill_ccw
= fill_back
;
244 key
.offset_cw
= offset_front
;
245 key
.offset_ccw
= offset_back
;
246 if (ctx
->Light
.Model
.TwoSide
&&
247 key
.fill_ccw
!= CLIP_CULL
)
248 key
.copy_bfc_ccw
= 1;
255 if (!brw_search_cache(&brw
->cache
, BRW_CLIP_PROG
,
257 &brw
->clip
.prog_offset
, &brw
->clip
.prog_data
)) {
258 compile_clip_prog( brw
, &key
);
263 const struct brw_tracked_state brw_clip_prog
= {
265 .mesa
= (_NEW_LIGHT
|
269 .brw
= (BRW_NEW_REDUCED_PRIMITIVE
|
270 BRW_NEW_VUE_MAP_GEOM_OUT
|
271 BRW_NEW_INTERPOLATION_MAP
)
273 .emit
= brw_upload_clip_prog