revert linear upside-down gradientswip/gl2

1 files changed, 3 insertions, 1 deletions

diff --git a/src/cairo-gl-composite.c b/src/cairo-gl-composite.c
index c0d4519fa..4bb15d65c 100644
--- a/src/cairo-gl-composite.c
+++ b/src/cairo-gl-composite.c
@@ -184,9 +184,11 @@ _cairo_gl_gradient_operand_init (cairo_gl_operand_t *operand,
 	dy *= invden;
 
 	cairo_matrix_transform_point (&matrix, &x0, &y0);
+	y0 -= dst->height;
+	y0 = -y0;
 
 	operand->linear.dx = dx * pattern->matrix.xx + dy * pattern->matrix.yx;
-	operand->linear.dy = dx * pattern->matrix.xy + dy * pattern->matrix.yy;
+	operand->linear.dy = -dx * pattern->matrix.xy - dy * pattern->matrix.yy;
 	operand->linear.off = -(x0 * operand->linear.dx + y0 * operand->linear.dy);
 
         operand->linear.extend = pattern->extend;