1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
|
/*
* Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas. All Rights Reserved.
* Copyright (c) 2005 Jesse Barnes <jbarnes@virtuousgeek.org>
* Copyright © 2010 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Authors:
* Jesse Barns <jbarnes@virtuousgeek.org>
* Chris Wilson <chris@chris-wilson.co.uk>
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "xf86.h"
#include "sna.h"
/**
* Returns whether the provided transform is affine.
*
* transform may be null.
*/
Bool sna_transform_is_affine(const PictTransform *t)
{
if (t == NULL)
return TRUE;
return t->matrix[2][0] == 0 && t->matrix[2][1] == 0;
}
Bool
sna_transform_is_translation(const PictTransform *t,
pixman_fixed_t *tx,
pixman_fixed_t *ty)
{
if (t == NULL) {
*tx = *ty = 0;
return TRUE;
}
if (t->matrix[0][0] != IntToxFixed(1) ||
t->matrix[0][1] != 0 ||
t->matrix[1][0] != 0 ||
t->matrix[1][1] != IntToxFixed(1) ||
t->matrix[2][0] != 0 ||
t->matrix[2][1] != 0 ||
t->matrix[2][2] != IntToxFixed(1))
return FALSE;
*tx = t->matrix[0][2];
*ty = t->matrix[1][2];
return TRUE;
}
Bool
sna_transform_is_integer_translation(const PictTransform *t, int16_t *tx, int16_t *ty)
{
if (t == NULL) {
*tx = *ty = 0;
return TRUE;
}
if (t->matrix[0][0] != IntToxFixed(1) ||
t->matrix[0][1] != 0 ||
t->matrix[1][0] != 0 ||
t->matrix[1][1] != IntToxFixed(1) ||
t->matrix[2][0] != 0 ||
t->matrix[2][1] != 0 ||
t->matrix[2][2] != IntToxFixed(1))
return FALSE;
if (pixman_fixed_fraction(t->matrix[0][2]) ||
pixman_fixed_fraction(t->matrix[1][2]))
return FALSE;
*tx = pixman_fixed_to_int(t->matrix[0][2]);
*ty = pixman_fixed_to_int(t->matrix[1][2]);
return TRUE;
}
/**
* Returns the floating-point coordinates transformed by the given transform.
*/
void
sna_get_transformed_coordinates(int x, int y,
const PictTransform *transform,
float *x_out, float *y_out)
{
if (transform == NULL) {
*x_out = x;
*y_out = y;
} else
_sna_get_transformed_coordinates(x, y, transform, x_out, y_out);
}
/**
* Returns the un-normalized floating-point coordinates transformed by the given transform.
*/
Bool
sna_get_transformed_coordinates_3d(int x, int y,
const PictTransform *transform,
float *x_out, float *y_out, float *w_out)
{
if (transform == NULL) {
*x_out = x;
*y_out = y;
*w_out = 1;
} else {
int64_t result[3];
if (!_sna_transform_point(transform, x, y, result))
return FALSE;
*x_out = result[0] / 65536.;
*y_out = result[1] / 65536.;
*w_out = result[2] / 65536.;
}
return TRUE;
}
|
