overlay in blend mode

1 files changed, 12 insertions, 0 deletions

diff --git a/rotord/src/cvimage.cpp b/rotord/src/cvimage.cpp
index 74a21dd..8f2c181 100644
--- a/rotord/src/cvimage.cpp
+++ b/rotord/src/cvimage.cpp
@@ -138,6 +138,18 @@ namespace Rotor {
 		//}
 		return *this;
 	}
+	Image & Image::overlay(cv::Mat &other){
+		if (other.w!=w||other.h!=h) {
+			cerr<<"Rotor: cannot overlay images with different sizes! (wanted "<<w<<"x"<<h<<", got "<<other.w<<"x"<<other.h<<")"<<endl;
+			//why not??
+		}
+		else {
+			for (int i=0;i<h*w*3;i++) {
+			rgb.data[i]=pixels.overlsy[rgb.data[i]][other.rgb.data[i]];
+			}
+		}
+		return *this;
+	}
 	Image & Image::operator=(const Image &other) {
 		//can be optimised? was trying to use other.data.clone()
 		setup(other.w,other.h);