From 311e440f30c218015d17fb390f50829f430d5128 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juha=20Vehvil=C3=A4inen?= <jusu@users.sourceforge.net>
Date: Tue, 9 Jul 2002 12:19:44 +0000
Subject: PixelPack002 by Olaf Matthes

svn path=/trunk/Framestein/; revision=30
---
 Plugins/multiply.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 Plugins/multiply.c

(limited to 'Plugins/multiply.c')

diff --git a/Plugins/multiply.c b/Plugins/multiply.c
new file mode 100644
index 0000000..45aa9bb
--- /dev/null
+++ b/Plugins/multiply.c
@@ -0,0 +1,85 @@
+//
+//  multiply - multiply of two images
+//  
+//	written by Olaf Matthes <olaf.matthes@gmx.de>
+//
+//  This program is free software; you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation; either version 2 of the License, or
+//  (at your option) any later version.
+//
+//  This program is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with this program; if not, write to the Free Software
+//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+//   
+//  usage: multiply
+//
+
+#include "plugin.h"
+
+void perform_effect(struct frame f, struct args a)
+{
+	printf("Using multiply 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;
+
+	w = f1.width<f2.width ? f1.width : f2.width;
+	h = f1.height<f2.height ? f1.height : f2.height;
+
+	printf("multiply\n");
+
+	switch(f1.pixelformat)
+	{
+		case 16:
+			// compare images pixel by pixel
+			for(y = 0; y < h; y++) 
+			{
+				pix1_16 = scanline16(f1, y);
+				pix2_16 = scanline16(f2, y);
+				for(x = 0; x < w; x++)
+				{
+					pix2_16[x] = rgbtocolor16(klamp255(r16(pix1_16[x])*r16(pix2_16[x])/255), 
+						                      klamp255(g16(pix1_16[x])*g16(pix2_16[x])/255), 
+											  klamp255(b16(pix1_16[x])*b16(pix2_16[x])/255));
+				}
+			}
+			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++)
+				{
+					pix2_24[x] = rgbtocolor24(klamp255(r24(pix1_24[x])*r24(pix2_24[x])/255), 
+						                      klamp255(g24(pix1_24[x])*g24(pix2_24[x])/255), 
+											  klamp255(b24(pix1_24[x])*b24(pix2_24[x])/255));
+				}
+			}
+			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++)
+				{
+					pix2_32[x] = rgbtocolor32(klamp255(r32(pix1_32[x])*r32(pix2_32[x])/255), 
+						                      klamp255(g32(pix1_32[x])*g32(pix2_32[x])/255), 
+											  klamp255(b32(pix1_32[x])*b32(pix2_32[x])/255));
+				}
+			}
+			break;
+	}
+}
-- 
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