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
& BITFIELD64_BIT(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
);
159 key
.pv_first
= (ctx
->Light
.ProvokingVertex
== GL_FIRST_VERTEX_CONVENTION
);
161 key
.nr_userclip
= brw_count_bits(ctx
->Transform
.ClipPlanesEnabled
);
163 if (BRW_IS_IGDNG(brw
))
164 key
.clip_mode
= BRW_CLIPMODE_KERNEL_CLIP
;
166 key
.clip_mode
= BRW_CLIPMODE_NORMAL
;
169 if (key
.primitive
== GL_TRIANGLES
) {
170 if (ctx
->Polygon
.CullFlag
&&
171 ctx
->Polygon
.CullFaceMode
== GL_FRONT_AND_BACK
)
172 key
.clip_mode
= BRW_CLIPMODE_REJECT_ALL
;
174 GLuint fill_front
= CLIP_CULL
;
175 GLuint fill_back
= CLIP_CULL
;
176 GLuint offset_front
= 0;
177 GLuint offset_back
= 0;
179 if (!ctx
->Polygon
.CullFlag
||
180 ctx
->Polygon
.CullFaceMode
!= GL_FRONT
) {
181 switch (ctx
->Polygon
.FrontMode
) {
183 fill_front
= CLIP_FILL
;
187 fill_front
= CLIP_LINE
;
188 offset_front
= ctx
->Polygon
.OffsetLine
;
191 fill_front
= CLIP_POINT
;
192 offset_front
= ctx
->Polygon
.OffsetPoint
;
197 if (!ctx
->Polygon
.CullFlag
||
198 ctx
->Polygon
.CullFaceMode
!= GL_BACK
) {
199 switch (ctx
->Polygon
.BackMode
) {
201 fill_back
= CLIP_FILL
;
205 fill_back
= CLIP_LINE
;
206 offset_back
= ctx
->Polygon
.OffsetLine
;
209 fill_back
= CLIP_POINT
;
210 offset_back
= ctx
->Polygon
.OffsetPoint
;
215 if (ctx
->Polygon
.BackMode
!= GL_FILL
||
216 ctx
->Polygon
.FrontMode
!= GL_FILL
) {
219 /* Most cases the fixed function units will handle. Cases where
220 * one or more polygon faces are unfilled will require help:
222 key
.clip_mode
= BRW_CLIPMODE_CLIP_NON_REJECTED
;
224 if (offset_back
|| offset_front
) {
225 /* _NEW_POLYGON, _NEW_BUFFERS */
226 key
.offset_units
= ctx
->Polygon
.OffsetUnits
* brw
->intel
.polygon_offset_scale
;
227 key
.offset_factor
= ctx
->Polygon
.OffsetFactor
* ctx
->DrawBuffer
->_MRD
;
230 switch (ctx
->Polygon
.FrontFace
) {
232 key
.fill_ccw
= fill_front
;
233 key
.fill_cw
= fill_back
;
234 key
.offset_ccw
= offset_front
;
235 key
.offset_cw
= offset_back
;
236 if (ctx
->Light
.Model
.TwoSide
&&
237 key
.fill_cw
!= CLIP_CULL
)
241 key
.fill_cw
= fill_front
;
242 key
.fill_ccw
= fill_back
;
243 key
.offset_cw
= offset_front
;
244 key
.offset_ccw
= offset_back
;
245 if (ctx
->Light
.Model
.TwoSide
&&
246 key
.fill_ccw
!= CLIP_CULL
)
247 key
.copy_bfc_ccw
= 1;
254 dri_bo_unreference(brw
->clip
.prog_bo
);
255 brw
->clip
.prog_bo
= brw_search_cache(&brw
->cache
, BRW_CLIP_PROG
,
258 &brw
->clip
.prog_data
);
259 if (brw
->clip
.prog_bo
== NULL
)
260 compile_clip_prog( brw
, &key
);
264 const struct brw_tracked_state brw_clip_prog
= {
266 .mesa
= (_NEW_LIGHT
|
270 .brw
= (BRW_NEW_REDUCED_PRIMITIVE
),
271 .cache
= CACHE_NEW_VS_PROG
273 .prepare
= upload_clip_prog