Fix alpha handling for blur; it needs to be on the working (rewritten-to) effect.

[movit] / blur_effect.h

diff --git a/blur_effect.h b/blur_effect.h
index 792014b9214a7e7390a53762dcc5fe0992df101f..76f7389d1568739a3312df999c64e20857728367 100644 (file)
--- a/blur_effect.h
+++ b/blur_effect.h
@@ -24,7 +24,6 @@ public:
        virtual bool needs_texture_bounce() const { return true; }
        virtual bool needs_mipmaps() const { return true; }
        virtual bool needs_srgb_primaries() const { return false; }
-       virtual AlphaHandling alpha_handling() const { return INPUT_AND_OUTPUT_ALPHA_PREMULTIPLIED; }
 
        virtual void inform_input_size(unsigned input_num, unsigned width, unsigned height);
 
@@ -58,6 +57,7 @@ public:
        virtual bool needs_texture_bounce() const { return true; }
        virtual bool needs_mipmaps() const { return true; }
        virtual bool needs_srgb_primaries() const { return false; }
+       virtual AlphaHandling alpha_handling() const { return INPUT_PREMULTIPLIED_ALPHA_KEEP_BLANK; }
 
        virtual void inform_input_size(unsigned input_num, unsigned width, unsigned height) {
                if (parent != NULL) {