| 0,0 → 1,147 |
|---|
| /* |
| * 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.; |
| } |
| } |
| } |