2 Copyright (C) Intel Corp. 2006. All Rights Reserved.
3 Intel funded Tungsten Graphics (http://www.tungstengraphics.com) 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 <keith@tungstengraphics.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"
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
;
59 memset(&c
, 0, sizeof(c
));
61 /* Begin the compilation:
63 brw_init_compile(brw
, &c
.func
);
65 c
.func
.single_program_flow
= 1;
68 c
.need_ff_sync
= BRW_IS_IGDNG(brw
);
70 /* Need to locate the two positions present in vertex + header.
71 * These are currently hardcoded:
73 c
.header_position_offset
= ATTR_SIZE
;
75 if (BRW_IS_IGDNG(brw
))
80 for (i
= 0; i
< VERT_RESULT_MAX
; i
++)
81 if (c
.key
.attrs
& (1<<i
)) {
86 c
.nr_attrs
= brw_count_bits(c
.key
.attrs
);
88 if (BRW_IS_IGDNG(brw
))
89 c
.nr_regs
= (c
.nr_attrs
+ 1) / 2 + 3; /* are vertices packed, or reg-aligned? */
91 c
.nr_regs
= (c
.nr_attrs
+ 1) / 2 + 1; /* are vertices packed, or reg-aligned? */
93 c
.nr_bytes
= c
.nr_regs
* REG_SIZE
;
95 c
.prog_data
.clip_mode
= c
.key
.clip_mode
; /* XXX */
97 /* For some reason the thread is spawned with only 4 channels
100 brw_set_mask_control(&c
.func
, BRW_MASK_DISABLE
);
103 /* Would ideally have the option of producing a program which could
106 switch (key
->primitive
) {
108 if (key
->do_unfilled
)
109 brw_emit_unfilled_clip( &c
);
111 brw_emit_tri_clip( &c
);
114 brw_emit_line_clip( &c
);
117 brw_emit_point_clip( &c
);
128 program
= brw_get_program(&c
.func
, &program_size
);
132 dri_bo_unreference(brw
->clip
.prog_bo
);
133 brw
->clip
.prog_bo
= brw_upload_cache( &brw
->cache
,
135 &c
.key
, sizeof(c
.key
),
137 program
, program_size
,
139 &brw
->clip
.prog_data
);
142 /* Calculate interpolants for triangle and line rasterization.
144 static void upload_clip_prog(struct brw_context
*brw
)
146 GLcontext
*ctx
= &brw
->intel
.ctx
;
147 struct brw_clip_prog_key key
;
149 memset(&key
, 0, sizeof(key
));
153 /* BRW_NEW_REDUCED_PRIMITIVE */
154 key
.primitive
= brw
->intel
.reduced_primitive
;
155 /* CACHE_NEW_VS_PROG */
156 key
.attrs
= brw
->vs
.prog_data
->outputs_written
;
158 key
.do_flat_shading
= (ctx
->Light
.ShadeModel
== GL_FLAT
);
160 key
.nr_userclip
= brw_count_bits(ctx
->Transform
.ClipPlanesEnabled
);
162 if (BRW_IS_IGDNG(brw
))
163 key
.clip_mode
= BRW_CLIPMODE_KERNEL_CLIP
;
165 key
.clip_mode
= BRW_CLIPMODE_NORMAL
;
168 if (key
.primitive
== GL_TRIANGLES
) {
169 if (ctx
->Polygon
.CullFlag
&&
170 ctx
->Polygon
.CullFaceMode
== GL_FRONT_AND_BACK
)
171 key
.clip_mode
= BRW_CLIPMODE_REJECT_ALL
;
173 GLuint fill_front
= CLIP_CULL
;
174 GLuint fill_back
= CLIP_CULL
;
175 GLuint offset_front
= 0;
176 GLuint offset_back
= 0;
178 if (!ctx
->Polygon
.CullFlag
||
179 ctx
->Polygon
.CullFaceMode
!= GL_FRONT
) {
180 switch (ctx
->Polygon
.FrontMode
) {
182 fill_front
= CLIP_FILL
;
186 fill_front
= CLIP_LINE
;
187 offset_front
= ctx
->Polygon
.OffsetLine
;
190 fill_front
= CLIP_POINT
;
191 offset_front
= ctx
->Polygon
.OffsetPoint
;
196 if (!ctx
->Polygon
.CullFlag
||
197 ctx
->Polygon
.CullFaceMode
!= GL_BACK
) {
198 switch (ctx
->Polygon
.BackMode
) {
200 fill_back
= CLIP_FILL
;
204 fill_back
= CLIP_LINE
;
205 offset_back
= ctx
->Polygon
.OffsetLine
;
208 fill_back
= CLIP_POINT
;
209 offset_back
= ctx
->Polygon
.OffsetPoint
;
214 if (ctx
->Polygon
.BackMode
!= GL_FILL
||
215 ctx
->Polygon
.FrontMode
!= GL_FILL
) {
218 /* Most cases the fixed function units will handle. Cases where
219 * one or more polygon faces are unfilled will require help:
221 key
.clip_mode
= BRW_CLIPMODE_CLIP_NON_REJECTED
;
223 if (offset_back
|| offset_front
) {
224 /* _NEW_POLYGON, _NEW_BUFFERS */
225 key
.offset_units
= ctx
->Polygon
.OffsetUnits
* brw
->intel
.polygon_offset_scale
;
226 key
.offset_factor
= ctx
->Polygon
.OffsetFactor
* ctx
->DrawBuffer
->_MRD
;
229 switch (ctx
->Polygon
.FrontFace
) {
231 key
.fill_ccw
= fill_front
;
232 key
.fill_cw
= fill_back
;
233 key
.offset_ccw
= offset_front
;
234 key
.offset_cw
= offset_back
;
235 if (ctx
->Light
.Model
.TwoSide
&&
236 key
.fill_cw
!= CLIP_CULL
)
240 key
.fill_cw
= fill_front
;
241 key
.fill_ccw
= fill_back
;
242 key
.offset_cw
= offset_front
;
243 key
.offset_ccw
= offset_back
;
244 if (ctx
->Light
.Model
.TwoSide
&&
245 key
.fill_ccw
!= CLIP_CULL
)
246 key
.copy_bfc_ccw
= 1;
253 dri_bo_unreference(brw
->clip
.prog_bo
);
254 brw
->clip
.prog_bo
= brw_search_cache(&brw
->cache
, BRW_CLIP_PROG
,
257 &brw
->clip
.prog_data
);
258 if (brw
->clip
.prog_bo
== NULL
)
259 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 .cache
= CACHE_NEW_VS_PROG
272 .prepare
= upload_clip_prog