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_with_auxdata(&brw
->cache
,
135 &c
.key
, sizeof(c
.key
),
137 program
, program_size
,
140 &brw
->clip
.prog_data
);
143 /* Calculate interpolants for triangle and line rasterization.
145 static void upload_clip_prog(struct brw_context
*brw
)
147 struct intel_context
*intel
= &brw
->intel
;
148 GLcontext
*ctx
= &intel
->ctx
;
149 struct brw_clip_prog_key key
;
151 memset(&key
, 0, sizeof(key
));
155 /* BRW_NEW_REDUCED_PRIMITIVE */
156 key
.primitive
= brw
->intel
.reduced_primitive
;
157 /* CACHE_NEW_VS_PROG */
158 key
.attrs
= brw
->vs
.prog_data
->outputs_written
;
160 key
.do_flat_shading
= (ctx
->Light
.ShadeModel
== GL_FLAT
);
161 key
.pv_first
= (ctx
->Light
.ProvokingVertex
== GL_FIRST_VERTEX_CONVENTION
);
163 key
.nr_userclip
= brw_count_bits(ctx
->Transform
.ClipPlanesEnabled
);
165 if (intel
->is_ironlake
)
166 key
.clip_mode
= BRW_CLIPMODE_KERNEL_CLIP
;
168 key
.clip_mode
= BRW_CLIPMODE_NORMAL
;
171 if (key
.primitive
== GL_TRIANGLES
) {
172 if (ctx
->Polygon
.CullFlag
&&
173 ctx
->Polygon
.CullFaceMode
== GL_FRONT_AND_BACK
)
174 key
.clip_mode
= BRW_CLIPMODE_REJECT_ALL
;
176 GLuint fill_front
= CLIP_CULL
;
177 GLuint fill_back
= CLIP_CULL
;
178 GLuint offset_front
= 0;
179 GLuint offset_back
= 0;
181 if (!ctx
->Polygon
.CullFlag
||
182 ctx
->Polygon
.CullFaceMode
!= GL_FRONT
) {
183 switch (ctx
->Polygon
.FrontMode
) {
185 fill_front
= CLIP_FILL
;
189 fill_front
= CLIP_LINE
;
190 offset_front
= ctx
->Polygon
.OffsetLine
;
193 fill_front
= CLIP_POINT
;
194 offset_front
= ctx
->Polygon
.OffsetPoint
;
199 if (!ctx
->Polygon
.CullFlag
||
200 ctx
->Polygon
.CullFaceMode
!= GL_BACK
) {
201 switch (ctx
->Polygon
.BackMode
) {
203 fill_back
= CLIP_FILL
;
207 fill_back
= CLIP_LINE
;
208 offset_back
= ctx
->Polygon
.OffsetLine
;
211 fill_back
= CLIP_POINT
;
212 offset_back
= ctx
->Polygon
.OffsetPoint
;
217 if (ctx
->Polygon
.BackMode
!= GL_FILL
||
218 ctx
->Polygon
.FrontMode
!= GL_FILL
) {
221 /* Most cases the fixed function units will handle. Cases where
222 * one or more polygon faces are unfilled will require help:
224 key
.clip_mode
= BRW_CLIPMODE_CLIP_NON_REJECTED
;
226 if (offset_back
|| offset_front
) {
227 /* _NEW_POLYGON, _NEW_BUFFERS */
228 key
.offset_units
= ctx
->Polygon
.OffsetUnits
* brw
->intel
.polygon_offset_scale
;
229 key
.offset_factor
= ctx
->Polygon
.OffsetFactor
* ctx
->DrawBuffer
->_MRD
;
232 switch (ctx
->Polygon
.FrontFace
) {
234 key
.fill_ccw
= fill_front
;
235 key
.fill_cw
= fill_back
;
236 key
.offset_ccw
= offset_front
;
237 key
.offset_cw
= offset_back
;
238 if (ctx
->Light
.Model
.TwoSide
&&
239 key
.fill_cw
!= CLIP_CULL
)
243 key
.fill_cw
= fill_front
;
244 key
.fill_ccw
= fill_back
;
245 key
.offset_cw
= offset_front
;
246 key
.offset_ccw
= offset_back
;
247 if (ctx
->Light
.Model
.TwoSide
&&
248 key
.fill_ccw
!= CLIP_CULL
)
249 key
.copy_bfc_ccw
= 1;
256 dri_bo_unreference(brw
->clip
.prog_bo
);
257 brw
->clip
.prog_bo
= brw_search_cache(&brw
->cache
, BRW_CLIP_PROG
,
260 &brw
->clip
.prog_data
);
261 if (brw
->clip
.prog_bo
== NULL
)
262 compile_clip_prog( brw
, &key
);
266 const struct brw_tracked_state brw_clip_prog
= {
268 .mesa
= (_NEW_LIGHT
|
272 .brw
= (BRW_NEW_REDUCED_PRIMITIVE
),
273 .cache
= CACHE_NEW_VS_PROG
275 .prepare
= upload_clip_prog