From f38cdcf952ac5c631ed285282e1bc2943f199101 Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@eclectronics.org>
Date: Fri, 30 Aug 2013 12:59:04 +0100
Subject: still image loader

---
 rotord/src/nodes_transform.h | 92 ++++----------------------------------------
 1 file changed, 8 insertions(+), 84 deletions(-)

diff --git a/rotord/src/nodes_transform.h b/rotord/src/nodes_transform.h
index 69a0af6..bb3a04f 100644
--- a/rotord/src/nodes_transform.h
+++ b/rotord/src/nodes_transform.h
@@ -32,6 +32,11 @@ namespace Rotor {
 			};
 			Image *transform(Image *in){
 					if (in){
+						//INTER_NEAREST - a nearest-neighbor interpolation
+						//INTER_LINEAR - a bilinear interpolation (used by default)
+						//INTER_AREA - resampling using pixel area relation. It may be a preferred method for image decimation, as it gives moire’-free results. But when the image is zoomed, it is similar to the INTER_NEAREST method.
+						//INTER_CUBIC - a bicubic interpolation over 4x4 pixel neighborhood
+						//INTER_LANCZOS4 - a Lanczos interpolation over 8x8 pixel neighborhood
 						int filtmode;
 						switch(attributes["filter"]->intVal){
 							case TRANSFORM_nearest:
@@ -83,7 +88,7 @@ namespace Rotor {
 
 						// Compute rotation matrix
 						//
-						cv::Point centre = cv::Point( oX*in->w, oY*in->h );
+						cv::Point centre = cv::Point( oX*image.w, oY*image.h );
 
 						rot_mat = getRotationMatrix2D( centre, r, s );
 						// Do the transformation
@@ -92,12 +97,6 @@ namespace Rotor {
 						warpAffine( inter.rgb, image.rgb, rot_mat, image.rgb.size(), filtmode, cv::BORDER_WRAP);
 						//BORDER_WRAP
 
-						//INTER_NEAREST - a nearest-neighbor interpolation
-						//INTER_LINEAR - a bilinear interpolation (used by default)
-						//INTER_AREA - resampling using pixel area relation. It may be a preferred method for image decimation, as it gives moire’-free results. But when the image is zoomed, it is similar to the INTER_NEAREST method.
-						//INTER_CUBIC - a bicubic interpolation over 4x4 pixel neighborhood
-						//INTER_LANCZOS4 - a Lanczos interpolation over 8x8 pixel neighborhood
-
 	                    return &image;
 	                }
 				return nullptr;
@@ -122,16 +121,9 @@ namespace Rotor {
 			}
 		private:
 	};
-	class Still_image: public Image_node {
+	class Still_image: public Transformer {
 		public:
 			Still_image(){
-				create_parameter("transformX","number","X transformation","Transform X",0.0f);
-				create_parameter("transformY","number","Y transformation","Transform X",0.0f);
-				create_parameter("originX","number","X transformation origin","Origin X",0.5f);
-				create_parameter("originY","number","Y transformation origin","Origin Y",0.5f);
-				create_parameter("rotation","number","Rotation about origin","Rotation",0.0f);
-				create_parameter("scale","number","Scale about origin","Scale",1.0f);
-				create_attribute("filter","Filtering mode","Filter mode","linear",{"nearest","linear","area","cubic","lanczos"});
 				create_attribute("filename","name of image file to load","File name","");
 				title="Still image";
 				description="Load a still image and apply 2D transformation";
@@ -151,75 +143,7 @@ namespace Rotor {
 			Still_image* clone(map<string,string> &_settings) { return new Still_image(_settings);};
 			Image *output(const Frame_spec &frame){
 				if (!still.rgb.empty()){
-					int filtmode;
-						switch(attributes["filter"]->intVal){
-							case TRANSFORM_nearest:
-								filtmode=cv::INTER_NEAREST;
-								break;
-							case TRANSFORM_linear:
-								filtmode=cv::INTER_LINEAR;
-								break;
-							case TRANSFORM_area:
-								filtmode=cv::INTER_AREA;
-								break;
-							case TRANSFORM_cubic:
-								filtmode=cv::INTER_CUBIC;
-								break;
-							case TRANSFORM_lanczos:
-								filtmode=cv::INTER_LANCZOS4;
-								break;
-						}
-
-						float tX=parameters["transformX"]->value;
-						float tY=parameters["transformY"]->value;
-						float oX=parameters["originX"]->value;
-						float oY=parameters["originY"]->value;
-						float r=parameters["rotation"]->value;
-						float s=parameters["scale"]->value;
-
-						cerr<<"still: xform "<<tX<<","<<tY<<" rotate "<<r<<", scale "<<s<<" from "<<oX<<","<<oY<<endl;
-
-						//do opencv transform
-						cv::Point2f srcTri[3], dstTri[3];
-						cv::Mat rot_mat(2,3,CV_32FC1);
-						cv::Mat trans_mat(2,3,CV_32FC1);
-
-						Image inter;
-						inter.setup(still.w,still.h);
-						// Compute matrix by creating triangle and transforming
-						//is there a better way - combine the 2? Just a bit of geometry
-						srcTri[0].x=0;
-						srcTri[0].y=0;
-						srcTri[1].x=still.w-1;
-						srcTri[1].y=0;
-						srcTri[2].x=0;
-						srcTri[2].y=still.h-1;
-						for (int i=0;i<3;i++){
-							dstTri[i].x=srcTri[i].x+(tX*still.w);
-							dstTri[i].y=srcTri[i].y+(tY*still.h);
-						}
-						trans_mat=getAffineTransform( srcTri, dstTri );
-						warpAffine( still.rgb, inter.rgb, trans_mat, inter.rgb.size(), filtmode, cv::BORDER_WRAP);
-
-
-						// Compute rotation matrix
-						//
-						cv::Point centre = cv::Point( oX*inter.w, oY*inter.h );
-
-						rot_mat = getRotationMatrix2D( centre, r, s );
-						// Do the transformation
-						//
-						
-						warpAffine( inter.rgb, image.rgb, rot_mat, image.rgb.size(), filtmode, cv::BORDER_WRAP);
-						//BORDER_WRAP
-
-						//INTER_NEAREST - a nearest-neighbor interpolation
-						//INTER_LINEAR - a bilinear interpolation (used by default)
-						//INTER_AREA - resampling using pixel area relation. It may be a preferred method for image decimation, as it gives moire’-free results. But when the image is zoomed, it is similar to the INTER_NEAREST method.
-						//INTER_CUBIC - a bicubic interpolation over 4x4 pixel neighborhood
-						//INTER_LANCZOS4 - a Lanczos interpolation over 8x8 pixel neighborhood
-
-	                    return &image;
+					return transform(&still);
 				}
 				else return nullptr;
 			}
-- 
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