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
;
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
;
80 delta
= header_regs
* REG_SIZE
;
82 for (i
= 0; i
< VERT_RESULT_MAX
; i
++) {
83 if (c
.key
.attrs
& BITFIELD64_BIT(i
)) {
87 c
.idx_to_attr
[c
.nr_attrs
] = i
;
92 /* The vertex attributes start at a URB row-aligned offset after
93 * the 8-20 dword vertex header, and continue for a URB row-aligned
94 * length. nr_regs determines the urb_read_length from the start
95 * of the header to the end of the vertex data.
97 c
.nr_regs
= header_regs
+ (c
.nr_attrs
+ 1) / 2;
99 c
.nr_bytes
= c
.nr_regs
* REG_SIZE
;
101 c
.prog_data
.clip_mode
= c
.key
.clip_mode
; /* XXX */
103 /* For some reason the thread is spawned with only 4 channels
106 brw_set_mask_control(&c
.func
, BRW_MASK_DISABLE
);
109 /* Would ideally have the option of producing a program which could
112 switch (key
->primitive
) {
114 if (key
->do_unfilled
)
115 brw_emit_unfilled_clip( &c
);
117 brw_emit_tri_clip( &c
);
120 brw_emit_line_clip( &c
);
123 brw_emit_point_clip( &c
);
134 program
= brw_get_program(&c
.func
, &program_size
);
136 if (INTEL_DEBUG
& DEBUG_CLIP
) {
138 for (i
= 0; i
< program_size
/ sizeof(struct brw_instruction
); i
++)
139 brw_disasm(stdout
, &((struct brw_instruction
*)program
)[i
],
146 drm_intel_bo_unreference(brw
->clip
.prog_bo
);
147 brw
->clip
.prog_bo
= brw_upload_cache_with_auxdata(&brw
->cache
,
149 &c
.key
, sizeof(c
.key
),
151 program
, program_size
,
154 &brw
->clip
.prog_data
);
157 /* Calculate interpolants for triangle and line rasterization.
159 static void upload_clip_prog(struct brw_context
*brw
)
161 struct intel_context
*intel
= &brw
->intel
;
162 GLcontext
*ctx
= &intel
->ctx
;
163 struct brw_clip_prog_key key
;
165 memset(&key
, 0, sizeof(key
));
169 /* BRW_NEW_REDUCED_PRIMITIVE */
170 key
.primitive
= brw
->intel
.reduced_primitive
;
171 /* CACHE_NEW_VS_PROG */
172 key
.attrs
= brw
->vs
.prog_data
->outputs_written
;
174 key
.do_flat_shading
= (ctx
->Light
.ShadeModel
== GL_FLAT
);
175 key
.pv_first
= (ctx
->Light
.ProvokingVertex
== GL_FIRST_VERTEX_CONVENTION
);
177 key
.nr_userclip
= brw_count_bits(ctx
->Transform
.ClipPlanesEnabled
);
180 key
.clip_mode
= BRW_CLIPMODE_KERNEL_CLIP
;
182 key
.clip_mode
= BRW_CLIPMODE_NORMAL
;
185 if (key
.primitive
== GL_TRIANGLES
) {
186 if (ctx
->Polygon
.CullFlag
&&
187 ctx
->Polygon
.CullFaceMode
== GL_FRONT_AND_BACK
)
188 key
.clip_mode
= BRW_CLIPMODE_REJECT_ALL
;
190 GLuint fill_front
= CLIP_CULL
;
191 GLuint fill_back
= CLIP_CULL
;
192 GLuint offset_front
= 0;
193 GLuint offset_back
= 0;
195 if (!ctx
->Polygon
.CullFlag
||
196 ctx
->Polygon
.CullFaceMode
!= GL_FRONT
) {
197 switch (ctx
->Polygon
.FrontMode
) {
199 fill_front
= CLIP_FILL
;
203 fill_front
= CLIP_LINE
;
204 offset_front
= ctx
->Polygon
.OffsetLine
;
207 fill_front
= CLIP_POINT
;
208 offset_front
= ctx
->Polygon
.OffsetPoint
;
213 if (!ctx
->Polygon
.CullFlag
||
214 ctx
->Polygon
.CullFaceMode
!= GL_BACK
) {
215 switch (ctx
->Polygon
.BackMode
) {
217 fill_back
= CLIP_FILL
;
221 fill_back
= CLIP_LINE
;
222 offset_back
= ctx
->Polygon
.OffsetLine
;
225 fill_back
= CLIP_POINT
;
226 offset_back
= ctx
->Polygon
.OffsetPoint
;
231 if (ctx
->Polygon
.BackMode
!= GL_FILL
||
232 ctx
->Polygon
.FrontMode
!= GL_FILL
) {
235 /* Most cases the fixed function units will handle. Cases where
236 * one or more polygon faces are unfilled will require help:
238 key
.clip_mode
= BRW_CLIPMODE_CLIP_NON_REJECTED
;
240 if (offset_back
|| offset_front
) {
241 /* _NEW_POLYGON, _NEW_BUFFERS */
242 key
.offset_units
= ctx
->Polygon
.OffsetUnits
* brw
->intel
.polygon_offset_scale
;
243 key
.offset_factor
= ctx
->Polygon
.OffsetFactor
* ctx
->DrawBuffer
->_MRD
;
246 switch (ctx
->Polygon
.FrontFace
) {
248 key
.fill_ccw
= fill_front
;
249 key
.fill_cw
= fill_back
;
250 key
.offset_ccw
= offset_front
;
251 key
.offset_cw
= offset_back
;
252 if (ctx
->Light
.Model
.TwoSide
&&
253 key
.fill_cw
!= CLIP_CULL
)
257 key
.fill_cw
= fill_front
;
258 key
.fill_ccw
= fill_back
;
259 key
.offset_cw
= offset_front
;
260 key
.offset_ccw
= offset_back
;
261 if (ctx
->Light
.Model
.TwoSide
&&
262 key
.fill_ccw
!= CLIP_CULL
)
263 key
.copy_bfc_ccw
= 1;
270 drm_intel_bo_unreference(brw
->clip
.prog_bo
);
271 brw
->clip
.prog_bo
= brw_search_cache(&brw
->cache
, BRW_CLIP_PROG
,
274 &brw
->clip
.prog_data
);
275 if (brw
->clip
.prog_bo
== NULL
)
276 compile_clip_prog( brw
, &key
);
280 const struct brw_tracked_state brw_clip_prog
= {
282 .mesa
= (_NEW_LIGHT
|
286 .brw
= (BRW_NEW_REDUCED_PRIMITIVE
),
287 .cache
= CACHE_NEW_VS_PROG
289 .prepare
= upload_clip_prog