Fix broken rotationsperspective-transform

Patch thanks to Derek Foreman <derekf@osg.samsung.com>

1 files changed, 4 insertions, 4 deletions

diff --git a/src/cairo-matrix.c b/src/cairo-matrix.c
index 6d6e3446e..83c6ebad1 100644
--- a/src/cairo-matrix.c
+++ b/src/cairo-matrix.c
@@ -356,8 +356,6 @@ cairo_matrix_multiply (cairo_matrix_t *result, const cairo_matrix_t *a, const ca
     r.py = a->xy * b->px + a->yy * b->py + a->py *     1;
     p0   = a->x0 * b->px + a->y0 * b->py +     1 *     1;
 
-    printf("cairo_matrix_multiply: xx=%f yx=%f xy=%f yy=%f x0=%f y0=%f\n", r.xx, r.yx, r.xy, r.yy, r.x0, r.y0);
-
     _cairo_matrix_scalar_multiply (&r, 1 / p0);
 
     *result = r;
@@ -414,10 +412,11 @@ void
 cairo_matrix_transform_distance (const cairo_matrix_t *matrix, double *dx, double *dy)
 {
     double new_p;
+    double old_x = *dx;
 
     new_p = matrix->px * *dx + matrix->py * *dy + 1;
     *dx = (matrix->xx * *dx + matrix->xy * *dy) / new_p;
-    *dy = (matrix->yx * *dx + matrix->yy * *dy) / new_p;
+    *dy = (matrix->yx * old_x + matrix->yy * *dy) / new_p;
 }
 slim_hidden_def(cairo_matrix_transform_distance);
 
@@ -435,10 +434,11 @@ void
 cairo_matrix_transform_point (const cairo_matrix_t *matrix, double *x, double *y)
 {
     double new_p;
+    double old_x = *x;
 
     new_p = matrix->px * *x + matrix->py * *y + 1;
     *x = (matrix->xx * *x + matrix->xy * *y + matrix->x0) / new_p;
-    *y = (matrix->yx * *x + matrix->yy * *y + matrix->y0) / new_p;
+    *y = (matrix->yx * old_x + matrix->yy * *y + matrix->y0) / new_p;
 }
 slim_hidden_def(cairo_matrix_transform_point);