Fixed cairo_set_source_surface() point due to scale

15 years ago · b05b5fc154
1 changed files with 5 additions and 4 deletions
--- a/src/CanvasRenderingContext2d.cc
+++ b/src/CanvasRenderingContext2d.cc
@ -457,10 +457,11 @@ Context2d::DrawImage(const Arguments &args) {

  // Scale src
  if (dw != sw || dh != sh) {
-    cairo_scale(ctx
-      , (float) dw / sw
-      , (float) dh / sh
-      );
+    double fx = (double) dw / sw;
+    double fy = (double) dh / sh;
+    cairo_scale(ctx, fx, fy);
+    dx /= fx;
+    dy /= fy;
  }
  // TODO: globalAlpha
  cairo_set_source_surface(ctx, src, dx, dy);