/usr/include/compiz/opengl/matrix.h is in compiz-dev 1:0.9.13.1+18.04.20180302-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | /*
* Copyright © 2008 Danny Baumann
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without
* fee, provided that the above copyright notice appear in all copies
* and that both that copyright notice and this permission notice
* appear in supporting documentation, and that the name of
* Dennis Kasprzyk not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior permission.
* Dennis Kasprzyk makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* DENNIS KASPRZYK DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
* NO EVENT SHALL DENNIS KASPRZYK BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Authors: Danny Baumann <maniac@compiz-fusion.org>
*/
#ifndef _GLMATRIX_H
#define _GLMATRIX_H
#include <core/point.h>
#include <core/rect.h>
#include <opengl/vector.h>
class CompOutput;
class GLMatrix {
public:
GLMatrix ();
GLMatrix (const float *);
const float* getMatrix () const;
GLMatrix& operator*= (const GLMatrix& rhs);
float& operator[] (unsigned int pos);
void reset ();
void toScreenSpace (const CompOutput *output, float z);
bool invert ();
void rotate (const float angle, const float x,
const float y, const float z);
void rotate (const float angle, const GLVector& vector);
void scale (const float x, const float y, const float z);
void scale (const GLVector& vector);
void translate (const float x, const float y, const float z);
void translate (const GLVector& vector);
private:
friend GLMatrix operator* (const GLMatrix& lhs,
const GLMatrix& rhs);
friend GLVector operator* (const GLMatrix& lhs,
const GLVector& rhs);
float m[16];
};
namespace compiz
{
namespace opengl
{
namespace matrix
{
/* This function returns co-ordinates into viewport space. In order
* to convert into something like damage rectangles please remember
* to flip on the y axis. */
inline CompPoint projectIntoViewport (const GLMatrix &modelview,
const GLMatrix &projection,
const CompRect &vp,
const GLVector &vector)
{
GLVector projected (projection * modelview * vector);
projected.homogenize ();
projected[0] = projected[0] * 0.5 + 0.5;
projected[1] = projected[1] * 0.5 + 0.5;
return CompPoint (projected[0] * vp.width () + vp.x (),
projected[1] * vp.height () + vp.y ());
}
}
}
}
#endif
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