From f533df23fb1cd3044aaa02bf74625e9b53c032c1 Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@eclectronics.org>
Date: Thu, 23 Jan 2014 17:57:37 +0000
Subject: mosaic node

---
 rotord/src/cvimage.h        | 32 ++++++++++++++++++++++++++++++--
 rotord/src/libavwrapper.cpp |  5 ++++-
 rotord/src/nodes_drawing.h  | 45 +++++++++++++++++++++++++--------------------
 rotord/src/rotor.cpp        |  1 +
 4 files changed, 60 insertions(+), 23 deletions(-)

diff --git a/rotord/src/cvimage.h b/rotord/src/cvimage.h
index b356f82..25cf3e8 100644
--- a/rotord/src/cvimage.h
+++ b/rotord/src/cvimage.h
@@ -218,10 +218,38 @@ namespace Rotor {
 				*/
 				return t;
 			}
-			void crop(int _w,int _h){ //change borders, crop/ extend
+			void crop(int _w,int _h){ //change borders, crop/ extend, centred
+				cv::Mat source;
+				int X,Y,W,H;
+				//do crop part
 				if ( _w<w||_h<h){
-
+					//create crop rectangle xywh
+					X=Y=0;
+					W=w;
+					H=h;
+					if (_w<w){
+						W=_w;
+						X=(w-_w)/2;
+						w=_w;
+					}
+					if (_h<h){
+						H=_h;
+						Y=(h-_h)/2;
+						h=_h;
+					}
+					cv::Mat cropped;
+					CvRect r=cvRect(X,Y,W,H) ;
+					rgb(r).copyTo(source);
 				}
+				else source=rgb;
+				copyMakeBorder(source,rgb,(_h-h)/2,(_h-h)/2,(_w-w)/2,(_w-w)/2,cv::BORDER_REPLICATE);
+				w=rgb.rows;
+				h=rgb.cols;
+			}
+			void resize(int _w,int _h){
+				cv::resize(rgb,rgb,cv::Size(_w,_h),0,0,cv::INTER_LINEAR );
+				w=rgb.rows;
+				h=rgb.cols;
 			}
 			Image & operator=(const Image &other);
 			//believe these still work, don't know if these optimisations are better than opencvs..
diff --git a/rotord/src/libavwrapper.cpp b/rotord/src/libavwrapper.cpp
index a6cb56d..4a8315f 100644
--- a/rotord/src/libavwrapper.cpp
+++ b/rotord/src/libavwrapper.cpp
@@ -267,10 +267,13 @@ bool libav::exporter::record(std::string filename){
 
     AVDictionary *opts = NULL; // "create" an empty dictionary
 
+    // https://libav.org/avprobe.html#MOV_002fMP4_002fISMV
+
     //THIS DOES SEEM TO SET CONTAINER OPTS= AS MOOV_SIZE MAKES THE MOVIE BANJAXED
     //av_dict_set(&opts, "moov_size", "20000", 0);
     if (fragmentation) {
-       av_dict_set(&opts, "movflags","frag_keyframe", 0);
+       av_dict_set(&opts, "movflags","frag_keyframe", 0); //makes a video watchable in chrome, quicktime & mplayer
+       //av_dict_set(&opts, "movflags","empty_moov",1); 
     }
 
 
diff --git a/rotord/src/nodes_drawing.h b/rotord/src/nodes_drawing.h
index f4ddbf7..7e7a178 100644
--- a/rotord/src/nodes_drawing.h
+++ b/rotord/src/nodes_drawing.h
@@ -201,39 +201,44 @@ namespace Rotor {
 	class Mosaic: public Draw_node {
 		//the difficulty here is in keeping the pixels centred
 		//the center of the screen should remain in between pixels
-		//this implies that the 
 		public:
 			Mosaic(){
 				title="Mosaic";
 				description="Increases size of pixels";
 				create_image_input("Image to mosaic","Image input");
-				create_parameter("pixels","number","Height of scrren in pixels","Pixels",20.0,0.0,1.0);
+				create_parameter("pixels","number","Height of screen in pixels","Pixels",20.0,0.0,1.0);
 				NODEID="a33a1a6a-8420-11e3-831b-74d02b29f6a6";
 			};
-			Mosaic(map<string,string> &settings):Shape() {
+			Mosaic(map<string,string> &settings):Mosaic() {
 				base_settings(settings);
 			};
 			~Mosaic(){};
 			Mosaic* clone(map<string,string> &_settings) { return new Mosaic(_settings);};
 			void vector_output(cairo_t * cr,const Frame_spec &frame){
-				colour=Colour(attributes["colour"]->value);
-				cairo_set_source_rgb(cr, colour.Rdouble(),colour.Gdouble(),colour.Bdouble());
-				switch(attributes["shape"]->intVal) {
-					case SHAPE_square:
-						cairo_rectangle(cr,-frame.w/2,-frame.w/2,frame.w,frame.w);
-                        break;
-					case SHAPE_circle:
-						cairo_arc(cr,0,0,frame.w/2,0.0, 2 * M_PI);
-                        break;
-                    case SHAPE_triangle:
-                    	//subtracting PI/2 =(1.5*PI)/3 so the triangle is pointing up
-						cairo_line_to(cr,0,-frame.w/2);
-						cairo_line_to(cr,cos((0.5 * M_PI)/3)*frame.w/2,sin((0.5 * M_PI)/3)*frame.w/2);
-						cairo_line_to(cr,cos((2.5 * M_PI)/3)*frame.w/2,sin((2.5 * M_PI)/3)*frame.w/2);
-						cairo_close_path(cr);
-                        break;
+				double vpix=max(parameters["pixels"]->value,1.0);
+				double pixel_size=frame.h/vpix;
+				int h_padded=ceil(vpix/2)*2;
+				int w_padded=ceil((((vpix/frame.h)*frame.w))/2)*2;
+
+				Image *in1=image_inputs[0]->get(frame);
+				if (in1){
+					Image in=*(in1);
+					in.crop(w_padded*pixel_size,h_padded*pixel_size);
+					in.resize(w_padded,h_padded);
+					int x_start=-((w_padded*pixel_size)/2);
+					int y_start=-((h_padded*pixel_size)/2);
+					cairo_translate(cr,x_start,y_start);
+					for (int i=0;i<w_padded;i++){
+						for (int j=0;j<h_padded;j++){
+							double R=((double)in.rgb.data[3*(w_padded*j + i) + 0])/255.0;
+							double G=((double)in.rgb.data[3*(w_padded*j + i) + 1])/255.0;
+							double B=((double)in.rgb.data[3*(w_padded*j + i) + 2])/255.0;
+							cairo_set_source_rgb(cr, R,G,B);
+							cairo_rectangle(cr,i*pixel_size,j*pixel_size,pixel_size,pixel_size);
+							cairo_fill(cr);
+						}
+					}
 				}
-				cairo_fill(cr);
 			}
 		private:
 	};
diff --git a/rotord/src/rotor.cpp b/rotord/src/rotor.cpp
index d16d9f4..b31e2ce 100644
--- a/rotord/src/rotor.cpp
+++ b/rotord/src/rotor.cpp
@@ -74,6 +74,7 @@ Node_factory::Node_factory(){
 
 	category["FX"]=vector<Node*>();
 	add_type("blur",new Blur(),category["FX"]);
+	add_type("mosaic",new Mosaic(),category["FX"]);
 	//add_type("vhs",new VHS(),category["FX"]);
 	add_type("echo_trails",new Echo_trails(),category["FX"]);
 	add_type("video_feedback",new Video_feedback(),category["FX"]);
-- 
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