63 lines
2.2 KiB
C
63 lines
2.2 KiB
C
/*
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* This is a stable interface of wlroots. Future changes will be limited to:
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*
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* - New functions
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* - New struct members
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* - New enum members
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*
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* Note that wlroots does not make an ABI compatibility promise - in the future,
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* the layout and size of structs used by wlroots may change, requiring code
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* depending on this header to be recompiled (but not edited).
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*
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* Breaking changes are announced in the release notes and follow a 1-year
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* deprecation schedule.
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*/
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#ifndef WLR_TYPES_WLR_MATRIX_H
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#define WLR_TYPES_WLR_MATRIX_H
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#include <wayland-server-protocol.h>
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struct wlr_box;
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/** Writes the identity matrix into mat */
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void wlr_matrix_identity(float mat[static 9]);
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/** mat ← a × b */
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void wlr_matrix_multiply(float mat[static 9], const float a[static 9],
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const float b[static 9]);
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void wlr_matrix_transpose(float mat[static 9], const float a[static 9]);
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/** Writes a 2D translation matrix to mat of magnitude (x, y) */
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void wlr_matrix_translate(float mat[static 9], float x, float y);
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/** Writes a 2D scale matrix to mat of magnitude (x, y) */
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void wlr_matrix_scale(float mat[static 9], float x, float y);
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/** Writes a 2D rotation matrix to mat at an angle of rad radians */
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void wlr_matrix_rotate(float mat[static 9], float rad);
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/** Writes a transformation matrix which applies the specified
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* wl_output_transform to mat */
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void wlr_matrix_transform(float mat[static 9],
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enum wl_output_transform transform);
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/** Writes a 2D orthographic projection matrix to mat of (width, height) with a
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* specified wl_output_transform.
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*
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* Deprecated: this function is deprecated and will be removed in a future
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* version of wlroots. */
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void wlr_matrix_projection(float mat[static 9], int width, int height,
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enum wl_output_transform transform);
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/** Shortcut for the various matrix operations involved in projecting the
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* specified wlr_box onto a given orthographic projection with a given
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* rotation. The result is written to mat, which can be applied to each
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* coordinate of the box to get a new coordinate from [-1,1]. */
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void wlr_matrix_project_box(float mat[static 9], const struct wlr_box *box,
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enum wl_output_transform transform, float rotation,
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const float projection[static 9]);
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#endif
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