From 741cba373d7e982026de91ee1ceeb18a8f64b367 Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@eclectronics.org>
Date: Wed, 4 Dec 2013 11:10:55 +0000
Subject: min/max

---
 rotord/src/cvimage.cpp      | 28 ++++++++++++++++++++++++++--
 rotord/src/cvimage.h        | 15 ++++++++++++++-
 rotord/src/nodes_channels.h | 34 +++++++++++++++++++++++++++++-----
 rotord/src/rotor.h          |  2 --
 4 files changed, 69 insertions(+), 10 deletions(-)

diff --git a/rotord/src/cvimage.cpp b/rotord/src/cvimage.cpp
index 2d0f8e2..7aae63e 100644
--- a/rotord/src/cvimage.cpp
+++ b/rotord/src/cvimage.cpp
@@ -150,6 +150,30 @@ namespace Rotor {
 		}
 		return *this;
 	}
+	Image & Image::min(const Image &other) {
+		if (other.w!=w||other.h!=h) {
+			cerr<<"Rotor: cannot min images with different sizes! (wanted "<<w<<"x"<<h<<", got "<<other.w<<"x"<<other.h<<")"<<endl;
+		}
+		else {
+			for (int i=0;i<w*h*3;i++){
+				//calculate with tables
+				rgb.data[i]=pixels.min[rgb.data[i]][other.rgb.data[i]];
+			}
+		}
+		return *this;
+	}
+	Image & Image::max(const Image &other) {
+		if (other.w!=w||other.h!=h) {
+			cerr<<"Rotor: cannot min images with different sizes! (wanted "<<w<<"x"<<h<<", got "<<other.w<<"x"<<other.h<<")"<<endl;
+		}
+		else {
+			for (int i=0;i<w*h*3;i++){
+				//calculate with tables
+				rgb.data[i]=pixels.max[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);
@@ -215,8 +239,8 @@ namespace Rotor {
 	cv::Mat& Image::get_mipmap(int level){
 		if (mipmaps.find(level)!=mipmaps.end()) return mipmaps[level];
 		//levels start at 1
-		int nw=max(1.0,w/pow(2,level));
-		int nh=max(1.0,h/pow(2,level));
+		int nw=std::max(1.0,w/pow(2,level));
+		int nh=std::max(1.0,h/pow(2,level));
 		cv::Mat mip;;
 		cv::resize(rgb,mip,cv::Size(nw,nh),0,0,cv::INTER_AREA );
 		mipmaps[level]=mip;
diff --git a/rotord/src/cvimage.h b/rotord/src/cvimage.h
index a0a2cf4..ee39edf 100644
--- a/rotord/src/cvimage.h
+++ b/rotord/src/cvimage.h
@@ -30,14 +30,20 @@ namespace Rotor {
 				add=new uint8_t*[256];
 				multiply=new uint8_t*[256];
 				overlay=new uint8_t*[256];
+				min=new uint8_t*[256];
+				max=new uint8_t*[256];
 				for (int i=0;i<256;i++){
 					add[i]=new uint8_t[256];
 					multiply[i]=new uint8_t[256];
 					overlay[i]=new uint8_t[256];
+					min[i]=new uint8_t[256];
+					max[i]=new uint8_t[256];
 					for (int j=0;j<256;j++){
 						add[i][j]=(uint8_t)std::min(i+j,0xFF);
 						multiply[i][j]=(uint8_t)(((float)i)*(((float)j)/255.0f));
 						overlay[i][j]=j<128?(uint8_t)((i*j)>>7):255-(((0xFF-i)*(0xFF-j))>>7);
+						min[i][j]=j<i?j:i;
+						max[i][j]=j>i?j:i;
 					}
 				}
 				mono_weights=new uint8_t*[3];
@@ -54,10 +60,14 @@ namespace Rotor {
 					delete[] add[i];
 					delete[] multiply[i];
 					delete[] overlay[i];
+					delete[] min[i];
+					delete[] max[i];
 				}
 				delete[] add;
 				delete[] multiply;
 				delete[] overlay;
+				delete[] min;
+				delete[] max;
 				for (int i=0;i<3;i++) {
 					delete[] mono_weights[i];
 				}
@@ -67,7 +77,8 @@ namespace Rotor {
 			uint8_t **multiply;
 			uint8_t **overlay;
 			uint8_t **mono_weights;
-
+			uint8_t **max;
+			uint8_t **min;
 	};
 	static pixeltables pixels;
 	class Image{
@@ -208,6 +219,8 @@ namespace Rotor {
 			Image &	add_wrap(const Image &other);
 			Image & divide_wrap(const Image &other);
 			Image & overlay(const Image &other);
+			Image &	min(const Image &other);
+			Image &	max(const Image &other);
 			Image & operator*=(const float &amount);
 			Image & operator+=(const float &amount);
 			Image & operator-=(const float &amount);
diff --git a/rotord/src/nodes_channels.h b/rotord/src/nodes_channels.h
index 1cb151e..4fdcd01 100644
--- a/rotord/src/nodes_channels.h
+++ b/rotord/src/nodes_channels.h
@@ -70,13 +70,15 @@ namespace Rotor {
 #define BLEND_wrap 5
 #define BLEND_xor 6
 #define BLEND_overlay 7
+#define BLEND_min 8
+#define BLEND_max 9
 	class Blend: public Image_node {
 		public:
 			Blend(){
 				create_image_input("image input 1","Image input 1");
 				create_image_input("image input 2","Image input 2");
 				create_parameter("amount","number","amount to blend input 2","Blend amount",0.5f,0.0f,1.0f);
-				create_attribute("mode","Blend mode","Blend mode","blend",{"blend","screen","multiply","alpha","wrap","xor","overlay"});
+				create_attribute("mode","Blend mode","Blend mode","blend",{"blend","screen","multiply","alpha","wrap","xor","overlay","min","max"});
 				title ="Blend";
 				description="Blend images in various modes";
 				NODEID="12ed7af0-2d0a-11e3-ae32-2b44203b93c9";
@@ -111,6 +113,12 @@ namespace Rotor {
 							case BLEND_overlay:
 								image=image.overlay(*in2);
 								break;
+							case BLEND_min:
+								image=image.min(*in2);
+								break;
+							case BLEND_max:
+								image=image.max(*in2);
+								break;
 							case BLEND_blend: //has to be last because of initialser of *in? go figure
 
 								image*=(1.0f-parameters["amount"]->value);
@@ -412,7 +420,7 @@ namespace Rotor {
 				//calls base class constructor first
 				create_parameter("number","number","number of echoes","Number echoes",25.0f);
 				create_parameter("fadeto","number","amount that echoes fade out","Fadout amount",1.0f,0.0f,1.0f);
-				create_attribute("mode","blend mode for echoes","Blend mode","screen",{"screen","wrap"});
+				create_attribute("mode","blend mode for echoes","Blend mode","screen",{"screen","wrap","min","max"});
 				title="Echo trails";
 				description="Draw trail frames additively that fade off over time";
 				NODEID="5b1ab684-2d0b-11e3-8fa2-970be8c360dd";
@@ -476,14 +484,30 @@ namespace Rotor {
 									if (attributes["mode"]->value=="screen") {
 										image+=*temp;
 									}
-									else {
+									if (attributes["mode"]->value=="wrap") {
 										image.add_wrap(*temp);
 									}
+									if (attributes["mode"]->value=="min") {
+										image.min(*temp);
+									}
+									if (attributes["mode"]->value=="max") {
+										image.max(*temp);
+									}
 									delete temp;
 								}
 								else {
-                                     if (attributes["mode"]->value=="screen") image+=*(images[absframe]);
-                                     else image=image.add_wrap(*(images[absframe]));
+                                     if (attributes["mode"]->value=="screen") {
+                                     	image+=*(images[absframe]);
+                                     }
+                                     if (attributes["mode"]->value=="screen") {
+                                     	image=image.add_wrap(*(images[absframe]));
+                                     }
+                                     if (attributes["mode"]->value=="min") {
+                                     	image=image.min(*(images[absframe]));
+                                     }
+                                     if (attributes["mode"]->value=="max") {
+                                     	image=image.max(*(images[absframe]));
+                                     }
 								}
 							}
 						}
diff --git a/rotord/src/rotor.h b/rotord/src/rotor.h
index c96663f..943464d 100644
--- a/rotord/src/rotor.h
+++ b/rotord/src/rotor.h
@@ -114,8 +114,6 @@ inputs: [
 	]
 
 
-REARCHITECTING STARTS HERE
-
 -------------------------*/
 
 
-- 
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