From f8d8ce4d35bfbba5391af2a3fbce2ad88f94dd69 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juha=20Vehvil=C3=A4inen?= <jusu@users.sourceforge.net>
Date: Tue, 9 Jul 2002 12:36:46 +0000
Subject: PeRColate

svn path=/trunk/Framestein/; revision=31
---
 Plugins/traffic.c | 106 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 Plugins/traffic.c

(limited to 'Plugins/traffic.c')

diff --git a/Plugins/traffic.c b/Plugins/traffic.c
new file mode 100644
index 0000000..be2dbba
--- /dev/null
+++ b/Plugins/traffic.c
@@ -0,0 +1,106 @@
+// 242.traffic -- does tristimulus matrix operations on an input image.
+//		by r. luke dubois (luke@music.columbia.edu),
+//			computer music center, columbia university, 2001.
+//
+//  Pd / Framestein port by Olaf Matthes <olaf.matthes@gmx.de>, June 2002
+//
+//	objects and source are provided without warranty of any kind, express or implied.
+//
+
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+#include <stdlib.h>
+#include "plugin.h"
+
+// tristimulus product used for matrix conversions
+
+static void tristimulus_product(float *matrix, byte *input, byte *output)
+{
+	int f, g;
+	for(f = 0; f < 3; f++)
+	{
+		output[f] = (byte)input[0]*matrix[f*3+0]+
+					      input[1]*matrix[f*3+1]+
+					      input[2]*matrix[f*3+2]; 
+	}
+}
+
+
+void perform_effect(struct frame f, struct args a)
+{
+	int i, x, y;
+	float matrix[9];
+	byte bits = f.pixelformat/8;
+	byte input[3], output[3];	// the color values
+	byte r, g, b;
+	pixel16 *c16;
+	pixel24 *c24;
+	pixel32 *c32;
+	char *t;
+
+	// get matrix params
+	if(!a.s) return;
+	matrix[0] = atof(a.s);
+	for(i = 1; i < 9; i++)
+	{
+		if(!(t = strstr(t+1, " "))) return;
+		matrix[i] = atof(t+1);
+	}
+
+	printf("traffic: matrix: %d %d %d\n"
+		   "                 %d %d %d\n"
+		   "                 %d %d %d\n", matrix[0], matrix[1], matrix[2],
+		    matrix[3], matrix[4], matrix[5], matrix[6], matrix[7], matrix[8]);
+
+	for(y = 0; y < f.height; y++) 
+	{
+		for(x = 0; x < f.width; x++)
+		{
+			switch (f.pixelformat)
+			{
+				case 16:
+					c16 = scanline16(f, y);
+					input[0] = r16(c16[x]);
+					input[1] = g16(c16[x]);
+					input[2] = b16(c16[x]);
+					tristimulus_product(matrix,input,output);
+					r = output[0]; 
+					g = output[1]; 
+					b = output[2]; 
+
+					c16[x] = rgbtocolor16(r, g, b);
+					break;
+				case 24:
+					c24 = scanline24(f, y);
+					input[0] = r24(c24[x]);
+					input[1] = g24(c24[x]);
+					input[2] = b24(c24[x]);
+					tristimulus_product(matrix,input,output);
+					r = output[0]; 
+					g = output[1]; 
+					b = output[2]; 
+
+					c24[x] = rgbtocolor24(r, g, b);
+					break;
+				case 32:
+					c32 = scanline32(f, y);
+					input[0] = r32(c32[x]);
+					input[1] = g32(c32[x]);
+					input[2] = b32(c32[x]);
+					tristimulus_product(matrix,input,output);
+					r = output[0]; 
+					g = output[1]; 
+					b = output[2]; 
+
+					c32[x] = rgbtocolor32(r, g, b);
+					break;
+			}
+		}
+	}
+}
+
+void perform_copy(struct frame f1, struct frame f2, struct args a)
+{
+	printf("Using traffic as copy operation does nothing!\n");
+}
-- 
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