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 #include "../glsl/ralloc.h"
47 #define FRONT_UNFILLED_BIT 0x1
48 #define BACK_UNFILLED_BIT 0x2
51 static void compile_clip_prog( struct brw_context
*brw
,
52 struct brw_clip_prog_key
*key
)
54 struct intel_context
*intel
= &brw
->intel
;
55 struct brw_clip_compile c
;
56 const GLuint
*program
;
63 memset(&c
, 0, sizeof(c
));
65 mem_ctx
= ralloc_context(NULL
);
67 /* Begin the compilation:
69 brw_init_compile(brw
, &c
.func
, mem_ctx
);
71 c
.func
.single_program_flow
= 1;
75 /* Need to locate the two positions present in vertex + header.
76 * These are currently hardcoded:
78 c
.header_position_offset
= ATTR_SIZE
;
85 delta
= header_regs
* REG_SIZE
;
87 for (i
= 0; i
< VERT_RESULT_MAX
; i
++) {
88 if (c
.key
.attrs
& BITFIELD64_BIT(i
)) {
92 c
.idx_to_attr
[c
.nr_attrs
] = i
;
97 /* The vertex attributes start at a URB row-aligned offset after
98 * the 8-20 dword vertex header, and continue for a URB row-aligned
99 * length. nr_regs determines the urb_read_length from the start
100 * of the header to the end of the vertex data.
102 c
.nr_regs
= header_regs
+ (c
.nr_attrs
+ 1) / 2;
104 c
.nr_bytes
= c
.nr_regs
* REG_SIZE
;
106 c
.prog_data
.clip_mode
= c
.key
.clip_mode
; /* XXX */
108 /* For some reason the thread is spawned with only 4 channels
111 brw_set_mask_control(&c
.func
, BRW_MASK_DISABLE
);
114 /* Would ideally have the option of producing a program which could
117 switch (key
->primitive
) {
119 if (key
->do_unfilled
)
120 brw_emit_unfilled_clip( &c
);
122 brw_emit_tri_clip( &c
);
125 brw_emit_line_clip( &c
);
128 brw_emit_point_clip( &c
);
139 program
= brw_get_program(&c
.func
, &program_size
);
141 if (unlikely(INTEL_DEBUG
& DEBUG_CLIP
)) {
143 for (i
= 0; i
< program_size
/ sizeof(struct brw_instruction
); i
++)
144 brw_disasm(stdout
, &((struct brw_instruction
*)program
)[i
],
149 brw_upload_cache(&brw
->cache
,
151 &c
.key
, sizeof(c
.key
),
152 program
, program_size
,
153 &c
.prog_data
, sizeof(c
.prog_data
),
154 &brw
->clip
.prog_offset
, &brw
->clip
.prog_data
);
155 ralloc_free(mem_ctx
);
158 /* Calculate interpolants for triangle and line rasterization.
160 static void upload_clip_prog(struct brw_context
*brw
)
162 struct intel_context
*intel
= &brw
->intel
;
163 struct gl_context
*ctx
= &intel
->ctx
;
164 struct brw_clip_prog_key key
;
166 memset(&key
, 0, sizeof(key
));
170 /* BRW_NEW_REDUCED_PRIMITIVE */
171 key
.primitive
= brw
->intel
.reduced_primitive
;
172 /* CACHE_NEW_VS_PROG */
173 key
.attrs
= brw
->vs
.prog_data
->outputs_written
;
175 key
.do_flat_shading
= (ctx
->Light
.ShadeModel
== GL_FLAT
);
176 key
.pv_first
= (ctx
->Light
.ProvokingVertex
== GL_FIRST_VERTEX_CONVENTION
);
178 key
.nr_userclip
= brw_count_bits(ctx
->Transform
.ClipPlanesEnabled
);
181 key
.clip_mode
= BRW_CLIPMODE_KERNEL_CLIP
;
183 key
.clip_mode
= BRW_CLIPMODE_NORMAL
;
186 if (key
.primitive
== GL_TRIANGLES
) {
187 if (ctx
->Polygon
.CullFlag
&&
188 ctx
->Polygon
.CullFaceMode
== GL_FRONT_AND_BACK
)
189 key
.clip_mode
= BRW_CLIPMODE_REJECT_ALL
;
191 GLuint fill_front
= CLIP_CULL
;
192 GLuint fill_back
= CLIP_CULL
;
193 GLuint offset_front
= 0;
194 GLuint offset_back
= 0;
196 if (!ctx
->Polygon
.CullFlag
||
197 ctx
->Polygon
.CullFaceMode
!= GL_FRONT
) {
198 switch (ctx
->Polygon
.FrontMode
) {
200 fill_front
= CLIP_FILL
;
204 fill_front
= CLIP_LINE
;
205 offset_front
= ctx
->Polygon
.OffsetLine
;
208 fill_front
= CLIP_POINT
;
209 offset_front
= ctx
->Polygon
.OffsetPoint
;
214 if (!ctx
->Polygon
.CullFlag
||
215 ctx
->Polygon
.CullFaceMode
!= GL_BACK
) {
216 switch (ctx
->Polygon
.BackMode
) {
218 fill_back
= CLIP_FILL
;
222 fill_back
= CLIP_LINE
;
223 offset_back
= ctx
->Polygon
.OffsetLine
;
226 fill_back
= CLIP_POINT
;
227 offset_back
= ctx
->Polygon
.OffsetPoint
;
232 if (ctx
->Polygon
.BackMode
!= GL_FILL
||
233 ctx
->Polygon
.FrontMode
!= GL_FILL
) {
236 /* Most cases the fixed function units will handle. Cases where
237 * one or more polygon faces are unfilled will require help:
239 key
.clip_mode
= BRW_CLIPMODE_CLIP_NON_REJECTED
;
241 if (offset_back
|| offset_front
) {
242 /* _NEW_POLYGON, _NEW_BUFFERS */
243 key
.offset_units
= ctx
->Polygon
.OffsetUnits
* brw
->intel
.polygon_offset_scale
;
244 key
.offset_factor
= ctx
->Polygon
.OffsetFactor
* ctx
->DrawBuffer
->_MRD
;
247 switch (ctx
->Polygon
.FrontFace
) {
249 key
.fill_ccw
= fill_front
;
250 key
.fill_cw
= fill_back
;
251 key
.offset_ccw
= offset_front
;
252 key
.offset_cw
= offset_back
;
253 if (ctx
->Light
.Model
.TwoSide
&&
254 key
.fill_cw
!= CLIP_CULL
)
258 key
.fill_cw
= fill_front
;
259 key
.fill_ccw
= fill_back
;
260 key
.offset_cw
= offset_front
;
261 key
.offset_ccw
= offset_back
;
262 if (ctx
->Light
.Model
.TwoSide
&&
263 key
.fill_ccw
!= CLIP_CULL
)
264 key
.copy_bfc_ccw
= 1;
271 if (!brw_search_cache(&brw
->cache
, BRW_CLIP_PROG
,
273 &brw
->clip
.prog_offset
, &brw
->clip
.prog_data
)) {
274 compile_clip_prog( brw
, &key
);
279 const struct brw_tracked_state brw_clip_prog
= {
281 .mesa
= (_NEW_LIGHT
|
285 .brw
= (BRW_NEW_REDUCED_PRIMITIVE
),
286 .cache
= CACHE_NEW_VS_PROG
288 .prepare
= upload_clip_prog