@ -1,20 +1,57 @@
/*
* This is a stable interface of wlroots . Future changes will be limited to :
*
* - New functions
* - New struct members
* - New enum members
*
* Note that wlroots does not make an ABI compatibility promise - in the future ,
* the layout and size of structs used by wlroots may change , requiring code
* depending on this header to be recompiled ( but not edited ) .
*
* Breaking changes are announced by email and follow a 1 - year deprecation
* schedule . Send an email to ~ sircmpwn / wlroots - announce + subscribe @ lists . sr . ht
* to receive these announcements .
*/
# ifndef WLR_TYPES_WLR_MATRIX_H
# define WLR_TYPES_WLR_MATRIX_H
# include <wayland-server.h>
# include <wlr/types/wlr_box.h>
/** Writes the identity matrix into mat */
void wlr_matrix_identity ( float mat [ static 9 ] ) ;
/** mat ← a ×
void wlr_matrix_multiply ( float mat [ static 9 ] , const float a [ static 9 ] ,
const float b [ static 9 ] ) ;
void wlr_matrix_transpose ( float mat [ static 9 ] , const float a [ static 9 ] ) ;
/** Writes a 2D translation matrix to mat of magnitude (x, y) */
void wlr_matrix_translate ( float mat [ static 9 ] , float x , float y ) ;
/** Writes a 2D scale matrix to mat of magnitude (x, y) */
void wlr_matrix_scale ( float mat [ static 9 ] , float x , float y ) ;
/** Writes a 2D rotation matrix to mat at an angle of rad radians */
void wlr_matrix_rotate ( float mat [ static 9 ] , float rad ) ;
/** Writes a transformation matrix which applies the specified
* wl_output_transform to mat */
void wlr_matrix_transform ( float mat [ static 9 ] ,
enum wl_output_transform transform ) ;
/** Writes a 2D orthographic projection matrix to mat of (width, height) with a
* specified wl_output_transform */
void wlr_matrix_projection ( float mat [ static 9 ] , int width , int height ,
enum wl_output_transform transform ) ;
/** Shortcut for the various matrix operations involved in projecting the
* specified wlr_box onto a given orthographic projection with a given
* rotation . The result is written to mat , which can be applied to each
* coordinate of the box to get a new coordinate from [ - 1 , 1 ] . */
void wlr_matrix_project_box ( float mat [ static 9 ] , const struct wlr_box * box ,
enum wl_output_transform transform , float rotation ,
const float projection [ static 9 ] ) ;
Drew DeVault
6 years ago