1 /**************************************************************************
3 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * 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, sub license, 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 portions
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
26 **************************************************************************/
28 #include "util/u_pack_color.h"
30 #include "pipe/p_state.h"
32 #include "brw_batchbuffer.h"
33 #include "brw_screen.h"
34 #include "brw_context.h"
37 #define MASK24 0xffffff
41 * Use blitting to clear the renderbuffers named by 'flags'.
42 * Note: we can't use the ctx->DrawBuffer->_ColorDrawBufferIndexes field
43 * since that might include software renderbuffers or renderbuffers
44 * which we're clearing with triangles.
45 * \param mask bitmask of BUFFER_BIT_* values indicating buffers to clear
47 static enum pipe_error
48 try_clear( struct brw_context
*brw
,
49 struct brw_surface
*surface
,
55 int x2
= surface
->base
.width
;
56 int y2
= surface
->base
.height
;
57 int pitch
= surface
->pitch
;
58 int cpp
= surface
->cpp
;
60 if (x2
== 0 || y2
== 0)
63 debug_printf("%s dst:buf(%p)/%d+%d %d,%d sz:%dx%d\n",
65 (void *)surface
->bo
, pitch
* cpp
,
67 x1
, y1
, x2
- x1
, y2
- y1
);
70 CMD
= XY_COLOR_BLT_CMD
| XY_BLT_WRITE_RGB
| XY_BLT_WRITE_ALPHA
;
72 /* Setup the blit command */
75 CMD
|= XY_BLT_WRITE_ALPHA
| XY_BLT_WRITE_RGB
;
82 /* XXX: nasty hack for clearing depth buffers
84 if (surface
->tiling
== BRW_TILING_Y
) {
88 if (surface
->tiling
== BRW_TILING_X
) {
93 BR13
|= (pitch
* cpp
);
98 OUT_BATCH((y1
<< 16) | x1
);
99 OUT_BATCH((y2
<< 16) | x2
);
100 OUT_RELOC(surface
->bo
,
102 surface
->base
.offset
);
112 static void color_clear(struct brw_context
*brw
,
113 struct brw_surface
*bsurface
,
119 util_pack_color( rgba
, bsurface
->base
.format
, &value
);
121 if (bsurface
->cpp
== 2)
122 value
|= value
<< 16;
124 ret
= try_clear( brw
, bsurface
, value
);
127 brw_context_flush( brw
);
128 ret
= try_clear( brw
, bsurface
, value
);
133 static void zstencil_clear(struct brw_context
*brw
,
134 struct brw_surface
*bsurface
,
141 switch (bsurface
->base
.format
) {
142 case PIPE_FORMAT_X8Z24_UNORM
:
143 case PIPE_FORMAT_S8Z24_UNORM
:
144 value
= ((unsigned)(depth
* MASK24
) & MASK24
);
146 case PIPE_FORMAT_Z16_UNORM
:
147 value
= ((unsigned)(depth
* MASK16
) & MASK16
);
154 switch (bsurface
->base
.format
) {
155 case PIPE_FORMAT_X8Z24_UNORM
:
156 case PIPE_FORMAT_S8Z24_UNORM
:
157 value
= value
| (stencil
<< 24);
160 case PIPE_FORMAT_Z16_UNORM
:
161 value
= value
| (value
<< 16);
168 ret
= try_clear( brw
, bsurface
, value
);
171 brw_context_flush( brw
);
172 ret
= try_clear( brw
, bsurface
, value
);
180 * Clear the given surface to the specified value.
181 * No masking, no scissor (clear entire buffer).
183 static void brw_clear(struct pipe_context
*pipe
,
189 struct brw_context
*brw
= brw_context( pipe
);
192 if (buffers
& PIPE_CLEAR_COLOR
) {
193 for (i
= 0; i
< brw
->curr
.fb
.nr_cbufs
; i
++) {
195 brw_surface(brw
->curr
.fb
.cbufs
[i
]),
200 if (buffers
& PIPE_CLEAR_DEPTHSTENCIL
) {
201 if (brw
->curr
.fb
.zsbuf
) {
203 brw_surface(brw
->curr
.fb
.zsbuf
),
210 void brw_pipe_clear_init( struct brw_context
*brw
)
212 brw
->base
.clear
= brw_clear
;
216 void brw_pipe_clear_cleanup( struct brw_context
*brw
)