1 /**************************************************************************
3 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
4 * Copyright 2009 Intel Corporation.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the
9 * "Software"), to deal in the Software without restriction, including
10 * without limitation the rights to use, copy, modify, merge, publish,
11 * distribute, sub license, and/or sell copies of the Software, and to
12 * permit persons to whom the Software is furnished to do so, subject to
13 * the following conditions:
15 * The above copyright notice and this permission notice (including the
16 * next paragraph) shall be included in all copies or substantial portions
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
27 **************************************************************************/
29 #include "main/glheader.h"
30 #include "main/mtypes.h"
31 #include "swrast/swrast.h"
32 #include "drivers/common/meta.h"
34 #include "intel_context.h"
35 #include "intel_blit.h"
36 #include "intel_chipset.h"
37 #include "intel_clear.h"
38 #include "intel_fbo.h"
39 #include "intel_pixel.h"
40 #include "intel_regions.h"
41 #include "intel_batchbuffer.h"
43 #define FILE_DEBUG_FLAG DEBUG_BLIT
45 static const char *buffer_names
[] = {
46 [BUFFER_FRONT_LEFT
] = "front",
47 [BUFFER_BACK_LEFT
] = "back",
48 [BUFFER_FRONT_RIGHT
] = "front right",
49 [BUFFER_BACK_RIGHT
] = "back right",
50 [BUFFER_DEPTH
] = "depth",
51 [BUFFER_STENCIL
] = "stencil",
52 [BUFFER_ACCUM
] = "accum",
53 [BUFFER_AUX0
] = "aux0",
54 [BUFFER_COLOR0
] = "color0",
55 [BUFFER_COLOR1
] = "color1",
56 [BUFFER_COLOR2
] = "color2",
57 [BUFFER_COLOR3
] = "color3",
58 [BUFFER_COLOR4
] = "color4",
59 [BUFFER_COLOR5
] = "color5",
60 [BUFFER_COLOR6
] = "color6",
61 [BUFFER_COLOR7
] = "color7",
65 * Called by ctx->Driver.Clear.
68 intelClear(GLcontext
*ctx
, GLbitfield mask
)
70 struct intel_context
*intel
= intel_context(ctx
);
71 const GLuint colorMask
= *((GLuint
*) & ctx
->Color
.ColorMask
);
72 GLbitfield tri_mask
= 0;
73 GLbitfield blit_mask
= 0;
74 GLbitfield swrast_mask
= 0;
75 struct gl_framebuffer
*fb
= ctx
->DrawBuffer
;
79 fprintf(stderr
, "%s\n", __FUNCTION__
);
81 /* HW color buffers (front, back, aux, generic FBO, etc) */
82 if (colorMask
== ~0) {
83 /* clear all R,G,B,A */
84 /* XXX FBO: need to check if colorbuffers are software RBOs! */
85 blit_mask
|= (mask
& BUFFER_BITS_COLOR
);
88 /* glColorMask in effect */
89 tri_mask
|= (mask
& (BUFFER_BIT_FRONT_LEFT
| BUFFER_BIT_BACK_LEFT
));
93 if (mask
& BUFFER_BIT_STENCIL
) {
94 const struct intel_region
*stencilRegion
95 = intel_get_rb_region(fb
, BUFFER_STENCIL
);
98 if (stencilRegion
->tiling
== I915_TILING_Y
||
99 (ctx
->Stencil
.WriteMask
[0] & 0xff) != 0xff) {
100 /* We have to use the 3D engine if we're clearing a partial mask
101 * of the stencil buffer, or if we're on a 965 which has a tiled
102 * depth/stencil buffer in a layout we can't blit to.
104 tri_mask
|= BUFFER_BIT_STENCIL
;
107 /* clearing all stencil bits, use blitting */
108 blit_mask
|= BUFFER_BIT_STENCIL
;
114 if (mask
& BUFFER_BIT_DEPTH
) {
115 const struct intel_region
*irb
= intel_get_rb_region(fb
, BUFFER_DEPTH
);
117 /* clear depth with whatever method is used for stencil (see above) */
118 if (irb
->tiling
== I915_TILING_Y
|| tri_mask
& BUFFER_BIT_STENCIL
)
119 tri_mask
|= BUFFER_BIT_DEPTH
;
121 blit_mask
|= BUFFER_BIT_DEPTH
;
124 /* If we're doing a tri pass for depth/stencil, include a likely color
127 if (mask
& (BUFFER_BIT_DEPTH
| BUFFER_BIT_STENCIL
)) {
128 int color_bit
= _mesa_ffs(mask
& BUFFER_BITS_COLOR
);
129 if (color_bit
!= 0) {
130 tri_mask
|= blit_mask
& (1 << (color_bit
- 1));
131 blit_mask
&= ~(1 << (color_bit
- 1));
135 /* SW fallback clearing */
136 swrast_mask
= mask
& ~tri_mask
& ~blit_mask
;
139 /* look for non-Intel renderbuffers (clear them with swrast) */
140 GLbitfield blit_or_tri
= blit_mask
| tri_mask
;
141 while (blit_or_tri
) {
142 GLuint i
= _mesa_ffs(blit_or_tri
) - 1;
143 GLbitfield bufBit
= 1 << i
;
144 if (!fb
->Attachment
[i
].Renderbuffer
->ClassID
) {
145 blit_mask
&= ~bufBit
;
147 swrast_mask
|= bufBit
;
149 blit_or_tri
^= bufBit
;
154 if (INTEL_DEBUG
& DEBUG_BLIT
) {
156 for (i
= 0; i
< BUFFER_COUNT
; i
++) {
157 if (blit_mask
& (1 << i
))
158 DBG(" %s", buffer_names
[i
]);
162 intelClearWithBlit(ctx
, blit_mask
);
166 if (INTEL_DEBUG
& DEBUG_BLIT
) {
168 for (i
= 0; i
< BUFFER_COUNT
; i
++) {
169 if (tri_mask
& (1 << i
))
170 DBG(" %s", buffer_names
[i
]);
175 _mesa_meta_Clear(&intel
->ctx
, tri_mask
);
176 intel_batchbuffer_flush(intel
->batch
);
180 if (INTEL_DEBUG
& DEBUG_BLIT
) {
181 DBG("swrast clear:");
182 for (i
= 0; i
< BUFFER_COUNT
; i
++) {
183 if (swrast_mask
& (1 << i
))
184 DBG(" %s", buffer_names
[i
]);
188 _swrast_Clear(ctx
, swrast_mask
);
194 intelInitClearFuncs(struct dd_function_table
*functions
)
196 functions
->Clear
= intelClear
;