diff options
Diffstat (limited to 'render/matrix.c')
| -rw-r--r-- | render/matrix.c | 39 |
1 files changed, 28 insertions, 11 deletions
diff --git a/render/matrix.c b/render/matrix.c index e49d365e..54dba4cc 100644 --- a/render/matrix.c +++ b/render/matrix.c @@ -86,38 +86,55 @@ void wlr_matrix_mul(const float (*x)[16], const float (*y)[16], float (*product) static const float transforms[][4] = { [WL_OUTPUT_TRANSFORM_NORMAL] = { 1.0f, 0.0f, - 0.0f, -1.0f, + 0.0f, 1.0f, }, [WL_OUTPUT_TRANSFORM_90] = { 0.0f, -1.0f, - -1.0f, 0.0f, + 1.0f, 0.0f, }, [WL_OUTPUT_TRANSFORM_180] = { -1.0f, 0.0f, - 0.0f, 1.0f, + 0.0f, -1.0f, }, [WL_OUTPUT_TRANSFORM_270] = { 0.0f, 1.0f, - 1.0f, 0.0f, + -1.0f, 0.0f, }, [WL_OUTPUT_TRANSFORM_FLIPPED] = { -1.0f, 0.0f, - 0.0f, -1.0f, + 0.0f, 1.0f, }, [WL_OUTPUT_TRANSFORM_FLIPPED_90] = { - 0.0f, 1.0f, + 0.0f, -1.0f, -1.0f, 0.0f, }, [WL_OUTPUT_TRANSFORM_FLIPPED_180] = { 1.0f, 0.0f, - 0.0f, 1.0f, + 0.0f, -1.0f, }, [WL_OUTPUT_TRANSFORM_FLIPPED_270] = { - 0.0f, -1.0f, + 0.0f, 1.0f, 1.0f, 0.0f, }, }; +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 + reflection + 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) { @@ -127,11 +144,11 @@ void wlr_matrix_texture(float mat[static 16], int32_t width, int32_t height, float x = 2.0f / width; float y = 2.0f / height; - // Rotation + relection + // Rotation + reflection mat[0] = x * t[0]; mat[1] = x * t[1]; - mat[4] = y * t[2]; - mat[5] = y * t[3]; + mat[4] = y * -t[2]; + mat[5] = y * -t[3]; // Translation mat[3] = -copysign(1.0f, mat[0] + mat[1]); |