2 * Copyright © 2014 Broadcom
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
27 * Contains the table and accessors for VC4 texture and render target format
30 * The hardware has limited support for texture formats, and extremely limited
31 * support for render target formats. As a result, we emulate other formats
32 * in our shader code, and this stores the table for doing so.
35 #include "util/u_format.h"
36 #include "util/macros.h"
38 #include "vc4_context.h"
45 /** Set if the pipe format is defined in the table. */
48 /** Set to 0 if unsupported, 1 if RGBA8888, 2 if rgb565. */
51 /** One of VC4_TEXTURE_TYPE_*. */
55 * Swizzle to apply to the RGBA shader output for storing to the tile
56 * buffer, to the RGBA tile buffer to produce shader input (for
57 * blending), and for turning the rgba8888 texture sampler return
58 * value into shader rgba values.
63 #define SWIZ(x,y,z,w) { \
70 #define FORMAT(pipe, rt, tex, swiz) \
71 [PIPE_FORMAT_##pipe] = { true, RT_##rt, VC4_TEXTURE_TYPE_##tex, swiz }
73 static const struct vc4_format vc4_format_table
[] = {
74 FORMAT(R8G8B8A8_UNORM
, RGBA8888
, RGBA8888
, SWIZ(X
, Y
, Z
, W
)),
75 FORMAT(R8G8B8X8_UNORM
, RGBA8888
, RGBA8888
, SWIZ(X
, Y
, Z
, 1)),
76 FORMAT(R8G8B8A8_SRGB
, RGBA8888
, RGBA8888
, SWIZ(X
, Y
, Z
, W
)),
77 FORMAT(R8G8B8X8_SRGB
, RGBA8888
, RGBA8888
, SWIZ(X
, Y
, Z
, 1)),
79 FORMAT(B8G8R8A8_UNORM
, RGBA8888
, RGBA8888
, SWIZ(Z
, Y
, X
, W
)),
80 FORMAT(B8G8R8X8_UNORM
, RGBA8888
, RGBA8888
, SWIZ(Z
, Y
, X
, 1)),
81 FORMAT(B8G8R8A8_SRGB
, RGBA8888
, RGBA8888
, SWIZ(Z
, Y
, X
, W
)),
82 FORMAT(B8G8R8X8_SRGB
, RGBA8888
, RGBA8888
, SWIZ(Z
, Y
, X
, 1)),
84 FORMAT(B5G6R5_UNORM
, RGB565
, RGB565
, SWIZ(X
, Y
, Z
, 1)),
86 FORMAT(ETC1_RGB8
, NO
, ETC1
, SWIZ(X
, Y
, Z
, 1)),
88 /* Depth sampling will be handled by doing nearest filtering and not
89 * unpacking the RGBA value.
91 FORMAT(S8_UINT_Z24_UNORM
, NO
, RGBA8888
, SWIZ(X
, Y
, Z
, W
)),
92 FORMAT(X8Z24_UNORM
, NO
, RGBA8888
, SWIZ(X
, Y
, Z
, W
)),
94 FORMAT(B4G4R4A4_UNORM
, NO
, RGBA4444
, SWIZ(Y
, Z
, W
, X
)),
95 FORMAT(B4G4R4X4_UNORM
, NO
, RGBA4444
, SWIZ(Y
, Z
, W
, 1)),
97 FORMAT(A1B5G5R5_UNORM
, NO
, RGBA5551
, SWIZ(X
, Y
, Z
, W
)),
98 FORMAT(X1B5G5R5_UNORM
, NO
, RGBA5551
, SWIZ(X
, Y
, Z
, 1)),
100 FORMAT(A8_UNORM
, NO
, ALPHA
, SWIZ(0, 0, 0, W
)),
101 FORMAT(L8_UNORM
, NO
, ALPHA
, SWIZ(W
, W
, W
, 1)),
102 FORMAT(I8_UNORM
, NO
, ALPHA
, SWIZ(W
, W
, W
, W
)),
103 FORMAT(R8_UNORM
, NO
, ALPHA
, SWIZ(W
, 0, 0, 1)),
105 FORMAT(L8A8_UNORM
, NO
, LUMALPHA
, SWIZ(X
, X
, X
, W
)),
106 FORMAT(R8G8_UNORM
, NO
, LUMALPHA
, SWIZ(X
, W
, 0, 1)),
109 static const struct vc4_format
*
110 get_format(enum pipe_format f
)
112 if (f
>= ARRAY_SIZE(vc4_format_table
) ||
113 !vc4_format_table
[f
].present
)
116 return &vc4_format_table
[f
];
120 vc4_rt_format_supported(enum pipe_format f
)
122 const struct vc4_format
*vf
= get_format(f
);
127 return vf
->rt_type
!= RT_NO
;
131 vc4_rt_format_is_565(enum pipe_format f
)
133 const struct vc4_format
*vf
= get_format(f
);
138 return vf
->rt_type
== RT_RGB565
;
142 vc4_tex_format_supported(enum pipe_format f
)
144 const struct vc4_format
*vf
= get_format(f
);
150 vc4_get_tex_format(enum pipe_format f
)
152 const struct vc4_format
*vf
= get_format(f
);
161 vc4_get_format_swizzle(enum pipe_format f
)
163 const struct vc4_format
*vf
= get_format(f
);
164 static const uint8_t fallback
[] = {0, 1, 2, 3};