initial drop of a few sources to start things out

1 files changed, 76 insertions, 0 deletions

diff --git a/AppKit/GTMLinearRGBShading.h b/AppKit/GTMLinearRGBShading.h
new file mode 100644
index 0000000..f6b6405
--- /dev/null
+++ b/AppKit/GTMLinearRGBShading.h
@@ -0,0 +1,76 @@
+//
+//  GTMLinearRGBShading.h
+//
+//  Copyright 2006-2008 Google Inc.
+//
+//  Licensed under the Apache License, Version 2.0 (the "License"); you may not
+//  use this file except in compliance with the License.  You may obtain a copy
+//  of the License at
+// 
+//  http://www.apache.org/licenses/LICENSE-2.0
+// 
+//  Unless required by applicable law or agreed to in writing, software
+//  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+//  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+//  License for the specific language governing permissions and limitations under
+//  the License.
+//
+
+#import <Cocoa/Cocoa.h>
+#import "GTMShading.h"
+#import "GTMCalculatedRange.h"
+
+///  A shading that does returns smooth linear values for RGB.
+//
+///  Thus if you create a shading from 0.0->red to 1.0->blue you will get
+///  \verbatim
+///    - 0.5->purple
+///    - 0.75->eggplant
+///    - 0.25->magenta
+/// \endverbatim
+
+@interface GTMLinearRGBShading : GTMCalculatedRange <GTMShading> {
+@private
+  CGFunctionRef function_;  // function used to calculated shading (STRONG)
+  CGColorSpaceRef colorSpace_; // colorspace used for shading (STRONG)
+  BOOL isCalibrated_;  // are we using calibrated or device RGB.
+  float colorValue[4];  // the RGBA color values
+}
+
+///  Generate a shading with color |begin| at position 0.0 and color |end| at 1.0.
+//
+//  Args: 
+//    begin: color at beginning of range
+//    end: color at end of range
+//    colorSpaceName: name of colorspace to draw into must be either
+//                    NSCalibratedRGBColorSpace or NSDeviceRGBColorSpace
+//
+//  Returns:
+//    a GTMLinearRGBShading
++ (id)shadingFromColor:(NSColor *)begin toColor:(NSColor *)end 
+        fromSpaceNamed:(NSString*)colorSpaceName;
+
+///  Generate a shading with a collection of colors at various positions.
+//
+//  Args:
+//    colors: a C style array containg the colors we are adding
+//    colorSpaceName: name of colorspace to draw into must be either
+//                    NSCalibratedRGBColorSpace or NSDeviceRGBColorSpace
+//    positions: a C style array containg the positions we want to 
+//              add the colors at
+//    numberOfColors: how many colors/positions we are adding
+//
+//  Returns:
+//    a GTMLinearRGBShading
++ (id)shadingWithColors:(NSColor **)colors
+         fromSpaceNamed:(NSString*)colorSpaceName
+            atPositions:(float *)positions 
+                  count:(unsigned int)numberOfColors;
+
+/// Designated initializer
+//  Args:
+//    colorSpaceName - name of the colorspace to use must be either
+//                     NSCalibratedRGBColorSpace or NSDeviceRGBColorSpace
+- (id)initWithColorSpaceName:(NSString*)colorSpaceName;
+
+@end