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"
45 #define FRONT_UNFILLED_BIT 0x1
46 #define BACK_UNFILLED_BIT 0x2
49 static void compile_clip_prog( struct brw_context
*brw
,
50 struct brw_clip_prog_key
*key
)
52 struct intel_context
*intel
= &brw
->intel
;
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;
69 /* Need to locate the two positions present in vertex + header.
70 * These are currently hardcoded:
72 c
.header_position_offset
= ATTR_SIZE
;
79 for (i
= 0; i
< VERT_RESULT_MAX
; i
++)
80 if (c
.key
.attrs
& BITFIELD64_BIT(i
)) {
85 c
.nr_attrs
= brw_count_bits(c
.key
.attrs
);
88 c
.nr_regs
= (c
.nr_attrs
+ 1) / 2 + 3; /* are vertices packed, or reg-aligned? */
90 c
.nr_regs
= (c
.nr_attrs
+ 1) / 2 + 1; /* are vertices packed, or reg-aligned? */
92 c
.nr_bytes
= c
.nr_regs
* REG_SIZE
;
94 c
.prog_data
.clip_mode
= c
.key
.clip_mode
; /* XXX */
96 /* For some reason the thread is spawned with only 4 channels
99 brw_set_mask_control(&c
.func
, BRW_MASK_DISABLE
);
102 /* Would ideally have the option of producing a program which could
105 switch (key
->primitive
) {
107 if (key
->do_unfilled
)
108 brw_emit_unfilled_clip( &c
);
110 brw_emit_tri_clip( &c
);
113 brw_emit_line_clip( &c
);
116 brw_emit_point_clip( &c
);
127 program
= brw_get_program(&c
.func
, &program_size
);
129 if (INTEL_DEBUG
& DEBUG_CLIP
) {
131 for (i
= 0; i
< program_size
/ sizeof(struct brw_instruction
); i
++)
132 brw_disasm(stdout
, &((struct brw_instruction
*)program
)[i
],
139 drm_intel_bo_unreference(brw
->clip
.prog_bo
);
140 brw
->clip
.prog_bo
= brw_upload_cache_with_auxdata(&brw
->cache
,
142 &c
.key
, sizeof(c
.key
),
144 program
, program_size
,
147 &brw
->clip
.prog_data
);
150 /* Calculate interpolants for triangle and line rasterization.
152 static void upload_clip_prog(struct brw_context
*brw
)
154 struct intel_context
*intel
= &brw
->intel
;
155 GLcontext
*ctx
= &intel
->ctx
;
156 struct brw_clip_prog_key key
;
158 memset(&key
, 0, sizeof(key
));
162 /* BRW_NEW_REDUCED_PRIMITIVE */
163 key
.primitive
= brw
->intel
.reduced_primitive
;
164 /* CACHE_NEW_VS_PROG */
165 key
.attrs
= brw
->vs
.prog_data
->outputs_written
;
167 key
.do_flat_shading
= (ctx
->Light
.ShadeModel
== GL_FLAT
);
168 key
.pv_first
= (ctx
->Light
.ProvokingVertex
== GL_FIRST_VERTEX_CONVENTION
);
170 key
.nr_userclip
= brw_count_bits(ctx
->Transform
.ClipPlanesEnabled
);
173 key
.clip_mode
= BRW_CLIPMODE_KERNEL_CLIP
;
175 key
.clip_mode
= BRW_CLIPMODE_NORMAL
;
178 if (key
.primitive
== GL_TRIANGLES
) {
179 if (ctx
->Polygon
.CullFlag
&&
180 ctx
->Polygon
.CullFaceMode
== GL_FRONT_AND_BACK
)
181 key
.clip_mode
= BRW_CLIPMODE_REJECT_ALL
;
183 GLuint fill_front
= CLIP_CULL
;
184 GLuint fill_back
= CLIP_CULL
;
185 GLuint offset_front
= 0;
186 GLuint offset_back
= 0;
188 if (!ctx
->Polygon
.CullFlag
||
189 ctx
->Polygon
.CullFaceMode
!= GL_FRONT
) {
190 switch (ctx
->Polygon
.FrontMode
) {
192 fill_front
= CLIP_FILL
;
196 fill_front
= CLIP_LINE
;
197 offset_front
= ctx
->Polygon
.OffsetLine
;
200 fill_front
= CLIP_POINT
;
201 offset_front
= ctx
->Polygon
.OffsetPoint
;
206 if (!ctx
->Polygon
.CullFlag
||
207 ctx
->Polygon
.CullFaceMode
!= GL_BACK
) {
208 switch (ctx
->Polygon
.BackMode
) {
210 fill_back
= CLIP_FILL
;
214 fill_back
= CLIP_LINE
;
215 offset_back
= ctx
->Polygon
.OffsetLine
;
218 fill_back
= CLIP_POINT
;
219 offset_back
= ctx
->Polygon
.OffsetPoint
;
224 if (ctx
->Polygon
.BackMode
!= GL_FILL
||
225 ctx
->Polygon
.FrontMode
!= GL_FILL
) {
228 /* Most cases the fixed function units will handle. Cases where
229 * one or more polygon faces are unfilled will require help:
231 key
.clip_mode
= BRW_CLIPMODE_CLIP_NON_REJECTED
;
233 if (offset_back
|| offset_front
) {
234 /* _NEW_POLYGON, _NEW_BUFFERS */
235 key
.offset_units
= ctx
->Polygon
.OffsetUnits
* brw
->intel
.polygon_offset_scale
;
236 key
.offset_factor
= ctx
->Polygon
.OffsetFactor
* ctx
->DrawBuffer
->_MRD
;
239 switch (ctx
->Polygon
.FrontFace
) {
241 key
.fill_ccw
= fill_front
;
242 key
.fill_cw
= fill_back
;
243 key
.offset_ccw
= offset_front
;
244 key
.offset_cw
= offset_back
;
245 if (ctx
->Light
.Model
.TwoSide
&&
246 key
.fill_cw
!= CLIP_CULL
)
250 key
.fill_cw
= fill_front
;
251 key
.fill_ccw
= fill_back
;
252 key
.offset_cw
= offset_front
;
253 key
.offset_ccw
= offset_back
;
254 if (ctx
->Light
.Model
.TwoSide
&&
255 key
.fill_ccw
!= CLIP_CULL
)
256 key
.copy_bfc_ccw
= 1;
263 drm_intel_bo_unreference(brw
->clip
.prog_bo
);
264 brw
->clip
.prog_bo
= brw_search_cache(&brw
->cache
, BRW_CLIP_PROG
,
267 &brw
->clip
.prog_data
);
268 if (brw
->clip
.prog_bo
== NULL
)
269 compile_clip_prog( brw
, &key
);
273 const struct brw_tracked_state brw_clip_prog
= {
275 .mesa
= (_NEW_LIGHT
|
279 .brw
= (BRW_NEW_REDUCED_PRIMITIVE
),
280 .cache
= CACHE_NEW_VS_PROG
282 .prepare
= upload_clip_prog