Hi,
when pdf2svg uses poppler to render a pdf to a cairo svg surface,
embedded images are downscaled by CairoOutputDev::downscaleSurface which
results in poor image quality.
Please find attached a simple patch preventing downscaling for svg
surfaces. Works for me.
Could this be useful for other scalable surface types, too?
Regards,
Jan
diff --git a/poppler/CairoOutputDev.cc b/poppler/CairoOutputDev.cc
index fae0136..10c61e9 100644
--- a/poppler/CairoOutputDev.cc
+++ b/poppler/CairoOutputDev.cc
@@ -1730,10 +1730,15 @@ cairo_surface_t *CairoOutputDev::downscaleSurface(cairo_surface_t *orig_surface)
int scaledHeight;
int scaledWidth;
GBool res;
+ cairo_surface_type_t surface_type;
if (printing)
return NULL;
+ surface_type = cairo_surface_get_type(cairo_get_target(cairo));
+ if (surface_type == CAIRO_SURFACE_TYPE_SVG)
+ return NULL;
+
orig_width = cairo_image_surface_get_width (orig_surface);
orig_height = cairo_image_surface_get_height (orig_surface);
getScaledSize (orig_width, orig_height, &scaledWidth, &scaledHeight);
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