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/keyscreen.c | 131 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)
 create mode 100644 Plugins/keyscreen.c

(limited to 'Plugins/keyscreen.c')

diff --git a/Plugins/keyscreen.c b/Plugins/keyscreen.c
new file mode 100644
index 0000000..45aea88
--- /dev/null
+++ b/Plugins/keyscreen.c
@@ -0,0 +1,131 @@
+// 242.keyscreen -- does 3-source chroma keying.
+//		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.
+//
+//  usage: keyscreen <red> <green> <blue> <fuzzi red> <fuzzi green> <fuzzi blue>
+//
+//         f2 is the key & target, f1 is the mask
+//
+
+#include <stdio.h>
+#include <string.h>
+#include "plugin.h"
+
+void perform_effect(struct frame f, struct args a)
+{
+	printf("Using keyscreen as effect does nothing!\n");
+}
+
+void perform_copy(struct frame f1, struct frame f2, struct args a)
+{
+	short x, y, w, h;
+	pixel16 *pix1_16, *pix2_16;
+	pixel24 *pix1_24, *pix2_24;
+	pixel32 *pix1_32, *pix2_32;
+	byte redpix, greenpix, bluepix;
+	byte red, green, blue, check, rf, gf, bf;
+	char *t;
+
+	w = f1.width<f2.width ? f1.width : f2.width;
+	h = f1.height<f2.height ? f1.height : f2.height;
+
+	// get params
+	if(!a.s) return;
+	red = atoi(a.s);
+	if(!(t = strstr(a.s, " "))) return;
+	green = atoi(t+1);
+	if(!(t = strstr(t+1, " "))) return;
+	blue = atoi(t+1);
+	if(!(t = strstr(t+1, " "))) return;
+	rf = atoi(t+1);
+	if(!(t = strstr(t+1, " "))) return;
+	gf = atoi(t+1);
+	if(!(t = strstr(t+1, " "))) return;
+	bf = atoi(t+1);
+
+	printf("keyscreen: r%d g%d b%d rf%d gf%d bf%d\n", red, green, blue, rf, gf, bf);
+
+	// key all channels simultaneously
+	switch(f1.pixelformat)
+	{
+		case 16:
+			for(y = 0; y < h; y++) 
+			{
+				pix1_16 = scanline16(f1, y);
+				pix2_16 = scanline16(f2, y);
+				for(x = 0; x < w; x++)
+				{
+					check = 0; // start with each pixel anew
+
+					redpix = r16(pix2_16[x]);
+					greenpix = g16(pix2_16[x]);
+					bluepix = b16(pix2_16[x]);
+					if ((redpix>=(red-rf))&&(redpix<=(red+rf))&&(greenpix>=(green-gf))&&(greenpix<=(green+gf))&&(bluepix>=(blue-bf))&&(bluepix<=(blue+bf)))
+					{
+						check = 1; // mask it
+					}        
+
+
+					if(check)		// output frame 1
+					{
+						pix2_16[x] = pix1_16[x];
+					}
+				}
+			}
+			break;
+		case 24:
+			for(y = 0; y < h; y++) 
+			{
+				pix1_24 = scanline24(f1, y);
+				pix2_24 = scanline24(f2, y);
+				for(x = 0; x < w; x++)
+				{
+					check = 0; // start with each pixel anew
+
+					redpix = r24(pix2_24[x]);
+					greenpix = g24(pix2_24[x]);
+					bluepix = b24(pix2_24[x]);
+					if ((redpix>=(red-rf))&&(redpix<=(red+rf))&&(greenpix>=(green-gf))&&(greenpix<=(green+gf))&&(bluepix>=(blue-bf))&&(bluepix<=(blue+bf)))
+					{
+						check = 1; // mask it
+					}        
+
+
+					if(check)		// output frame 1
+					{
+						pix1_24[x] = pix1_24[x];
+					}
+				}
+			}
+			break;
+		case 32:
+			for(y = 0; y < h; y++) 
+			{
+				pix1_32 = scanline32(f1, y);
+				pix2_32 = scanline32(f2, y);
+				for(x = 0; x < w; x++)
+				{
+					check = 0; // start with each pixel anew
+
+					redpix = r32(pix2_32[x]);
+					greenpix = g32(pix2_32[x]);
+					bluepix = b32(pix2_32[x]);
+					if ((redpix>=(red-rf))&&(redpix<=(red+rf))&&(greenpix>=(green-gf))&&(greenpix<=(green+gf))&&(bluepix>=(blue-bf))&&(bluepix<=(blue+bf)))
+					{
+						check = 1; // mask it
+					}        
+
+
+					if(check)		// output frame 1
+					{
+						pix2_32[x] = pix1_32[x];
+					}
+				}
+			}
+			break;
+	}
+}
-- 
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