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Fix surface transforms

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emersion 2017-11-30 23:58:12 +01:00
parent 779cccf8b4
commit f4754ad1a2
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4 changed files with 36 additions and 0 deletions
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17
render/matrix.c
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@ -118,6 +118,23 @@ static const float transforms[][4] = {
},
};
void wlr_matrix_transform(float mat[static 16],
enum wl_output_transform transform) {
memset(mat, 0, sizeof(*mat) * 16);
const float *t = transforms[transform];
// Rotation + relection
mat[0] = t[0];
mat[1] = t[1];
mat[4] = -t[2];
mat[5] = -t[3];
// Identity
mat[10] = 1.0f;
mat[15] = 1.0f;
}
// Equivilent to glOrtho(0, width, 0, height, 1, -1) with the transform applied
void wlr_matrix_texture(float mat[static 16], int32_t width, int32_t height,
enum wl_output_transform transform) {