1 /*
2 * Copyright (C) 2019 Collabora, Ltd.
3 *
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:
10 *
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
13 * Software.
14 *
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 FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 */
23
24 #include <stdio.h>
25 #include "pan_texture.h"
26 #include "panfrost-quirks.h"
27
28 /* Translate a PIPE swizzle quad to a 12-bit Mali swizzle code. PIPE
29 * swizzles line up with Mali swizzles for the XYZW01, but PIPE swizzles have
30 * an additional "NONE" field that we have to mask out to zero. Additionally,
31 * PIPE swizzles are sparse but Mali swizzles are packed */
32
33 unsigned
panfrost_translate_swizzle_4(const unsigned char swizzle[4])34 panfrost_translate_swizzle_4(const unsigned char swizzle[4])
35 {
36 unsigned out = 0;
37
38 for (unsigned i = 0; i < 4; ++i) {
39 unsigned translated = (swizzle[i] > PIPE_SWIZZLE_1) ? PIPE_SWIZZLE_0 : swizzle[i];
40 out |= (translated << (3*i));
41 }
42
43 return out;
44 }
45
46 void
panfrost_invert_swizzle(const unsigned char * in,unsigned char * out)47 panfrost_invert_swizzle(const unsigned char *in, unsigned char *out)
48 {
49 /* First, default to all zeroes to prevent uninitialized junk */
50
51 for (unsigned c = 0; c < 4; ++c)
52 out[c] = PIPE_SWIZZLE_0;
53
54 /* Now "do" what the swizzle says */
55
56 for (unsigned c = 0; c < 4; ++c) {
57 unsigned char i = in[c];
58
59 /* Who cares? */
60 assert(PIPE_SWIZZLE_X == 0);
61 if (i > PIPE_SWIZZLE_W)
62 continue;
63
64 /* Invert */
65 unsigned idx = i - PIPE_SWIZZLE_X;
66 out[idx] = PIPE_SWIZZLE_X + c;
67 }
68 }
69
70 /* Formats requiring blend shaders are stored raw in the tilebuffer and will
71 * have 0 as their pixel format. Assumes dithering is set, I don't know of a
72 * case when it makes sense to turn off dithering. */
73
74 unsigned
panfrost_format_to_bifrost_blend(const struct panfrost_device * dev,enum pipe_format format,bool dithered)75 panfrost_format_to_bifrost_blend(const struct panfrost_device *dev,
76 enum pipe_format format,
77 bool dithered)
78 {
79 mali_pixel_format pixfmt = (dev->arch >= 7) ?
80 panfrost_blendable_formats_v7[format].bifrost[dithered] :
81 panfrost_blendable_formats_v6[format].bifrost[dithered];
82
83 return pixfmt ?: dev->formats[format].hw;
84 }
85