1 /* 2 * Copyright (C) 2003, 2004, 2005, 2006 Apple Computer, Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #import "config.h" 27 #import "platform/mac/ColorMac.h" 28 29 #import <wtf/RetainPtr.h> 30 #import <wtf/StdLibExtras.h> 31 32 namespace WebCore { 33 34 // NSColor calls don't throw, so no need to block Cocoa exceptions in this file 35 36 NSColor *nsColor(const Color& color) 37 { 38 RGBA32 c = color.rgb(); 39 switch (c) { 40 case 0: { 41 // Need this to avoid returning nil because cachedRGBAValues will default to 0. 42 DEFINE_STATIC_LOCAL(RetainPtr<NSColor>, clearColor, ([NSColor colorWithDeviceRed:0 green:0 blue:0 alpha:0])); 43 return clearColor.get(); 44 } 45 case Color::black: { 46 DEFINE_STATIC_LOCAL(RetainPtr<NSColor>, blackColor, ([NSColor colorWithDeviceRed:0 green:0 blue:0 alpha:1])); 47 return blackColor.get(); 48 } 49 case Color::white: { 50 DEFINE_STATIC_LOCAL(RetainPtr<NSColor>, whiteColor, ([NSColor colorWithDeviceRed:1 green:1 blue:1 alpha:1])); 51 return whiteColor.get(); 52 } 53 default: { 54 const int cacheSize = 32; 55 static unsigned cachedRGBAValues[cacheSize]; 56 static RetainPtr<NSColor>* cachedColors = new RetainPtr<NSColor>[cacheSize]; 57 58 for (int i = 0; i != cacheSize; ++i) { 59 if (cachedRGBAValues[i] == c) 60 return cachedColors[i].get(); 61 } 62 63 NSColor *result = [NSColor colorWithDeviceRed:static_cast<CGFloat>(color.red()) / 255 64 green:static_cast<CGFloat>(color.green()) / 255 65 blue:static_cast<CGFloat>(color.blue()) / 255 66 alpha:static_cast<CGFloat>(color.alpha()) / 255]; 67 68 static int cursor; 69 cachedRGBAValues[cursor] = c; 70 cachedColors[cursor] = result; 71 if (++cursor == cacheSize) 72 cursor = 0; 73 return result; 74 } 75 } 76 } 77 78 79 } // namespace WebCore 80
