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util/matrix: Inline wlr_matrix_{identity, scale, translate}

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Alexander Orzechowski 2025-01-27 14:01:31 -05:00
parent 088b7c98c5
commit 99b6084fcd
2 changed files with 11 additions and 39 deletions
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9
include/util/matrix.h
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@ -6,19 +6,10 @@
struct wlr_box;
struct wlr_fbox;
/** Writes the identity matrix into mat */
void wlr_matrix_identity(float mat[static 9]);
/** mat ← a × b */
void wlr_matrix_multiply(float mat[static 9], const float a[static 9],
const float b[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 transformation matrix which applies the specified
* wl_output_transform to mat */
void wlr_matrix_transform(float mat[static 9],

41
util/matrix.c
View file

@ -3,15 +3,6 @@
#include <wlr/util/box.h>
#include "util/matrix.h"
void wlr_matrix_identity(float mat[static 9]) {
static const float identity[9] = {
1.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 1.0f,
};
memcpy(mat, identity, sizeof(identity));
}
void wlr_matrix_multiply(float mat[static 9], const float a[static 9],
const float b[static 9]) {
float product[9];
@ -31,24 +22,6 @@ void wlr_matrix_multiply(float mat[static 9], const float a[static 9],
memcpy(mat, product, sizeof(product));
}
void wlr_matrix_translate(float mat[static 9], float x, float y) {
float translate[9] = {
1.0f, 0.0f, x,
0.0f, 1.0f, y,
0.0f, 0.0f, 1.0f,
};
wlr_matrix_multiply(mat, mat, translate);
}
void wlr_matrix_scale(float mat[static 9], float x, float y) {
float scale[9] = {
x, 0.0f, 0.0f,
0.0f, y, 0.0f,
0.0f, 0.0f, 1.0f,
};
wlr_matrix_multiply(mat, mat, scale);
}
static const float transforms[][9] = {
[WL_OUTPUT_TRANSFORM_NORMAL] = {
1.0f, 0.0f, 0.0f,
@ -112,9 +85,17 @@ void matrix_projection(float mat[static 9], int width, int height) {
}
void wlr_matrix_project_fbox(float mat[static 9], const struct wlr_fbox *box) {
wlr_matrix_identity(mat);
wlr_matrix_translate(mat, box->x, box->y);
wlr_matrix_scale(mat, box->width, box->height);
mat[0] = box->width;
mat[1] = 0.0f;
mat[2] = box->x;
mat[3] = 0.0f;
mat[4] = box->height;
mat[5] = box->y;
mat[6] = 0.0f;
mat[7] = 0.0f;
mat[8] = 1.0f;
}
void wlr_matrix_project_box(float mat[static 9], const struct wlr_box *box) {