mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-15 19:33:59 +03:00
148 lines
4.2 KiB
C
148 lines
4.2 KiB
C
/*
|
|
* 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 "sna.h"
|
|
|
|
#define pixman_fixed_e ((pixman_fixed_t) 1)
|
|
#define pixman_fixed_1 (pixman_int_to_fixed(1))
|
|
#define pixman_fixed_1_minus_e (pixman_fixed_1 - pixman_fixed_e)
|
|
#define pixman_fixed_to_int(f) ((int) ((f) >> 16))
|
|
#define pixman_int_to_fixed(i) ((pixman_fixed_t) ((i) << 16))
|
|
#define pixman_fixed_fraction(f) ((f) & pixman_fixed_1_minus_e)
|
|
|
|
#define IntToxFixed(i) pixman_int_to_fixed(i)
|
|
|
|
/**
|
|
* 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.
|
|
*/
|
|
void
|
|
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)) {
|
|
*x_out = result[0] / 65536.;
|
|
*y_out = result[1] / 65536.;
|
|
*w_out = result[2] / 65536.;
|
|
} else {
|
|
*x_out = *y_out = 0;
|
|
*w_out = 1.;
|
|
}
|
|
}
|
|
}
|