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authorGeorges Basile Stavracas Neto <georges.stavracas@gmail.com>2019-02-27 17:30:08 -0300
committerGeorges Basile Stavracas Neto <georges.stavracas@gmail.com>2019-03-20 15:17:12 +0000
commitecee1591132cdb20e62e9841f1ec1547e1127e63 (patch)
tree1b2dc8dc1cc23b226cfec1d9a82cb90be1a5f66b
parentbb257868f3e686d8c231455a1f20e4f2a4b3d1b4 (diff)
downloadmutter-ecee1591132cdb20e62e9841f1ec1547e1127e63.tar.gz
cogl/matrix: Scale using Graphene
It sucks that we have to double transpose the matrix.
-rw-r--r--cogl/cogl/cogl-matrix.c29
1 files changed, 10 insertions, 19 deletions
diff --git a/cogl/cogl/cogl-matrix.c b/cogl/cogl/cogl-matrix.c
index 95139b22d..2c568c755 100644
--- a/cogl/cogl/cogl-matrix.c
+++ b/cogl/cogl/cogl-matrix.c
@@ -555,31 +555,22 @@ cogl_matrix_orthographic (CoglMatrix *matrix,
_COGL_MATRIX_DEBUG_PRINT (matrix);
}
-/*
- * Multiply a matrix with a general scaling matrix.
- *
- * Multiplies in-place the elements of matrix by the scale factors. Checks if
- * the scales factors are roughly the same, marking the MAT_FLAG_UNIFORM_SCALE
- * flag, or MAT_FLAG_GENERAL_SCALE. Marks the MAT_DIRTY_TYPE and
- * MAT_DIRTY_INVERSE dirty flags.
- */
-static void
-_cogl_matrix_scale (CoglMatrix *matrix, float x, float y, float z)
-{
- float *m = (float *)matrix;
- m[0] *= x; m[4] *= y; m[8] *= z;
- m[1] *= x; m[5] *= y; m[9] *= z;
- m[2] *= x; m[6] *= y; m[10] *= z;
- m[3] *= x; m[7] *= y; m[11] *= z;
-}
-
void
cogl_matrix_scale (CoglMatrix *matrix,
float sx,
float sy,
float sz)
{
- _cogl_matrix_scale (matrix, sx, sy, sz);
+ graphene_matrix_t m;
+
+ cogl_matrix_to_graphene_matrix (matrix, &m);
+
+ graphene_matrix_transpose (&m, &m);
+ graphene_matrix_scale (&m, sx, sy, sz);
+ graphene_matrix_transpose (&m, &m);
+
+ graphene_matrix_to_cogl_matrix (&m, matrix);
+
_COGL_MATRIX_DEBUG_PRINT (matrix);
}