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 intel_context
*intel
= &brw
->intel
;
54 struct brw_clip_compile c
;
55 const GLuint
*program
;
60 memset(&c
, 0, sizeof(c
));
62 /* Begin the compilation:
64 brw_init_compile(brw
, &c
.func
);
66 c
.func
.single_program_flow
= 1;
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 (intel
->is_ironlake
)
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 (intel
->is_ironlake
)
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 struct intel_context
*intel
= &brw
->intel
;
147 GLcontext
*ctx
= &intel
->ctx
;
148 struct brw_clip_prog_key key
;
150 memset(&key
, 0, sizeof(key
));
154 /* BRW_NEW_REDUCED_PRIMITIVE */
155 key
.primitive
= brw
->intel
.reduced_primitive
;
156 /* CACHE_NEW_VS_PROG */
157 key
.attrs
= brw
->vs
.prog_data
->outputs_written
;
159 key
.do_flat_shading
= (ctx
->Light
.ShadeModel
== GL_FLAT
);
160 key
.pv_first
= (ctx
->Light
.ProvokingVertex
== GL_FIRST_VERTEX_CONVENTION
);
162 key
.nr_userclip
= brw_count_bits(ctx
->Transform
.ClipPlanesEnabled
);
164 if (intel
->is_ironlake
)
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
* brw
->intel
.polygon_offset_scale
;
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 dri_bo_unreference(brw
->clip
.prog_bo
);
256 brw
->clip
.prog_bo
= brw_search_cache(&brw
->cache
, BRW_CLIP_PROG
,
259 &brw
->clip
.prog_data
);
260 if (brw
->clip
.prog_bo
== NULL
)
261 compile_clip_prog( brw
, &key
);
265 const struct brw_tracked_state brw_clip_prog
= {
267 .mesa
= (_NEW_LIGHT
|
271 .brw
= (BRW_NEW_REDUCED_PRIMITIVE
),
272 .cache
= CACHE_NEW_VS_PROG
274 .prepare
= upload_clip_prog