diff options
Diffstat (limited to 'src/drivers/Xlib')
| -rw-r--r-- | src/drivers/Xlib/Fl_Xlib_Graphics_Driver_image.cxx | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/src/drivers/Xlib/Fl_Xlib_Graphics_Driver_image.cxx b/src/drivers/Xlib/Fl_Xlib_Graphics_Driver_image.cxx index 2dc9a76aa..b43d29c91 100644 --- a/src/drivers/Xlib/Fl_Xlib_Graphics_Driver_image.cxx +++ b/src/drivers/Xlib/Fl_Xlib_Graphics_Driver_image.cxx @@ -812,6 +812,15 @@ int Fl_Xlib_Graphics_Driver::scale_and_render_pixmap(Fl_Offscreen pixmap, int de { XDoubleToFixed( 0 ), XDoubleToFixed( 0 ), XDoubleToFixed( 1 ) } }}; XRenderSetPictureTransform(fl_display, src, &mat); + if (Fl_Image::scaling_algorithm() == FL_RGB_SCALING_BILINEAR) { + XRenderSetPictureFilter(fl_display, src, FilterBilinear, 0, 0); + // A note at https://www.talisman.org/~erlkonig/misc/x11-composite-tutorial/ : + // "When you use a filter you'll probably want to use PictOpOver as the render op, + // regardless of whether the source picture has an alpha channel or not, since + // the edges may end up having alpha values after the filter has been applied." + // suggests this would be preferable : + // has_alpha = true; + } } XRenderComposite(fl_display, (has_alpha ? PictOpOver : PictOpSrc), src, None, dst, srcx, srcy, 0, 0, XP, YP, WP, HP); |