--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebCore/platform/graphics/svg/filters/cg/WKArithmeticFilter.m	Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2005 Oliver Hunt <ojh16@student.canterbury.ac.nz>.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#import "config.h"
+#import "WKArithmeticFilter.h"
+
+#if ENABLE(SVG) && ENABLE(SVG_EXPERIMENTAL_FEATURES)
+
+static CIKernel *arithmeticFilter = nil;
+
+@implementation WKArithmeticFilter
++ (void)initialize
+{
+    [CIFilter registerFilterName:@"WKArithmeticFilter"  
+                     constructor:self
+                 classAttributes:[NSDictionary dictionaryWithObjectsAndKeys:
+                     @"WebKit Arithmetic Filter", kCIAttributeFilterDisplayName,
+                     [NSArray arrayWithObjects:kCICategoryStylize, kCICategoryVideo,
+                         kCICategoryStillImage, kCICategoryNonSquarePixels,nil], kCIAttributeFilterCategories,
+                     [NSDictionary dictionaryWithObjectsAndKeys:
+                         [NSNumber numberWithDouble:0.0], kCIAttributeMin,
+                         [NSNumber numberWithDouble:0.0], kCIAttributeDefault,
+                         [NSNumber numberWithDouble:1.0], kCIAttributeIdentity,
+                         kCIAttributeTypeScalar, kCIAttributeType,
+                         nil], @"inputK1",                   
+                     [NSDictionary dictionaryWithObjectsAndKeys:
+                         [NSNumber numberWithDouble:0.0], kCIAttributeMin,
+                         [NSNumber numberWithDouble:0.0], kCIAttributeDefault,
+                         [NSNumber numberWithDouble:1.0], kCIAttributeIdentity,
+                         kCIAttributeTypeScalar, kCIAttributeType,
+                         nil], @"inputK2",              
+                     [NSDictionary dictionaryWithObjectsAndKeys:
+                         [NSNumber numberWithDouble:0.0], kCIAttributeMin,
+                         [NSNumber numberWithDouble:0.0], kCIAttributeDefault,
+                         [NSNumber numberWithDouble:1.0], kCIAttributeIdentity,
+                         kCIAttributeTypeScalar, kCIAttributeType,
+                         nil], @"inputK3",              
+                     [NSDictionary dictionaryWithObjectsAndKeys:
+                         [NSNumber numberWithDouble:0.0], kCIAttributeMin,
+                         [NSNumber numberWithDouble:0.0], kCIAttributeDefault,
+                         [NSNumber numberWithDouble:1.0], kCIAttributeIdentity,
+                         kCIAttributeTypeScalar, kCIAttributeType,
+                         nil], @"inputK4",
+                     nil]];
+}
+
++ (CIFilter *)filterWithName:(NSString *)name
+{
+    return [[[self alloc] init] autorelease];
+}
+
+- (id)init
+{
+    if (!arithmeticFilter) {
+        NSBundle *bundle = [NSBundle bundleForClass:[self class]];
+        NSString *kernelFile = [bundle pathForResource:@"WKArithmeticFilter" ofType:@"cikernel"];
+        NSString *code = [NSString stringWithContentsOfFile:kernelFile encoding:NSUTF8StringEncoding error:0];
+        NSArray *kernels = [CIKernel kernelsWithString:code];
+        arithmeticFilter = [[kernels objectAtIndex:0] retain];
+    }
+    return [super init];
+}
+
+- (CIImage *)outputImage
+{
+    return [self apply:arithmeticFilter, inputImage, inputBackgroundImage, inputK1, inputK2, inputK3,
+        inputK4, nil];
+}
+
+@end
+
+#endif // ENABLE(SVG) && ENABLE(SVG_EXPERIMENTAL_FEATURES)