2 * Copyright © 2009 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Eric Anholt <eric@anholt.net>
28 #include "brw_context.h"
29 #include "brw_state.h"
30 #include "brw_defines.h"
32 #include "intel_batchbuffer.h"
33 #include "main/fbobject.h"
36 upload_clip_state(struct brw_context
*brw
)
38 struct intel_context
*intel
= &brw
->intel
;
39 struct gl_context
*ctx
= &intel
->ctx
;
43 struct gl_framebuffer
*fb
= ctx
->DrawBuffer
;
45 /* CACHE_NEW_WM_PROG */
46 if (brw
->wm
.prog_data
->barycentric_interp_modes
&
47 BRW_WM_NONPERSPECTIVE_BARYCENTRIC_BITS
) {
48 dw2
|= GEN6_CLIP_NON_PERSPECTIVE_BARYCENTRIC_ENABLE
;
51 if (!ctx
->Transform
.DepthClamp
)
52 dw2
|= GEN6_CLIP_Z_TEST
;
55 if (ctx
->Light
.ProvokingVertex
== GL_FIRST_VERTEX_CONVENTION
) {
57 (0 << GEN6_CLIP_TRI_PROVOKE_SHIFT
) |
58 (1 << GEN6_CLIP_TRIFAN_PROVOKE_SHIFT
) |
59 (0 << GEN6_CLIP_LINE_PROVOKE_SHIFT
);
62 (2 << GEN6_CLIP_TRI_PROVOKE_SHIFT
) |
63 (2 << GEN6_CLIP_TRIFAN_PROVOKE_SHIFT
) |
64 (1 << GEN6_CLIP_LINE_PROVOKE_SHIFT
);
68 dw2
|= (ctx
->Transform
.ClipPlanesEnabled
<<
69 GEN6_USER_CLIP_CLIP_DISTANCES_SHIFT
);
71 if (ctx
->Viewport
.X
== 0 &&
72 ctx
->Viewport
.Y
== 0 &&
73 ctx
->Viewport
.Width
== fb
->Width
&&
74 ctx
->Viewport
.Height
== fb
->Height
) {
75 dw2
|= GEN6_CLIP_GB_TEST
;
79 OUT_BATCH(_3DSTATE_CLIP
<< 16 | (4 - 2));
80 OUT_BATCH(GEN6_CLIP_STATISTICS_ENABLE
);
81 OUT_BATCH(GEN6_CLIP_ENABLE
|
83 GEN6_CLIP_MODE_NORMAL
|
86 OUT_BATCH(U_FIXED(0.125, 3) << GEN6_CLIP_MIN_POINT_WIDTH_SHIFT
|
87 U_FIXED(255.875, 3) << GEN6_CLIP_MAX_POINT_WIDTH_SHIFT
|
88 GEN6_CLIP_FORCE_ZERO_RTAINDEX
);
92 const struct brw_tracked_state gen6_clip_state
= {
94 .mesa
= _NEW_TRANSFORM
| _NEW_LIGHT
| _NEW_BUFFERS
,
95 .brw
= (BRW_NEW_CONTEXT
),
96 .cache
= CACHE_NEW_WM_PROG
98 .emit
= upload_clip_state
,