/*
* Copyright (c) 2008-2023 Jonathan Schleifer <js@nil.im>
*
* All rights reserved.
*
* This file is part of ObjFW. It may be distributed under the terms of the
* Q Public License 1.0, which can be found in the file LICENSE.QPL included in
* the packaging of this file.
*
* Alternatively, it may be distributed under the terms of the GNU General
* Public License, either version 2 or 3, which can be found in the file
* LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this
* file.
*/
#include "config.h"
#include <math.h>
#import "OFColor.h"
#import "OFOnce.h"
#import "OFString.h"
#import "OFInvalidArgumentException.h"
@interface OFConcreteColor: OFColor
{
float _red, _green, _blue, _alpha;
OF_RESERVE_IVARS(OFColor, 4)
}
@end
@interface OFColorSingleton: OFConcreteColor
@end
@interface OFColorPlaceholder: OFColorSingleton
@end
#ifdef OF_OBJFW_RUNTIME
@interface OFTaggedPointerColor: OFColorSingleton
@end
static const float allowedImprecision = 0.0000001;
#endif
static struct {
Class isa;
} placeholder;
#ifdef OF_OBJFW_RUNTIME
static int colorTag;
#endif
@implementation OFColorPlaceholder
- (instancetype)initWithRed: (float)red
green: (float)green
blue: (float)blue
alpha: (float)alpha
{
#ifdef OF_OBJFW_RUNTIME
uint8_t redInt = nearbyintf(red * 255);
uint8_t greenInt = nearbyintf(green * 255);
uint8_t blueInt = nearbyintf(blue * 255);
if (fabsf(red * 255 - redInt) < allowedImprecision &&
fabsf(green * 255 - greenInt) < allowedImprecision &&
fabsf(blue * 255 - blueInt) < allowedImprecision && alpha == 1) {
id ret = objc_createTaggedPointer(colorTag,
(uintptr_t)redInt << 16 | (uintptr_t)greenInt << 8 |
(uintptr_t)blueInt);
if (ret != nil)
return ret;
}
#endif
return (id)[[OFConcreteColor alloc] initWithRed: red
green: green
blue: blue
alpha: alpha];
}
@end
@implementation OFColorSingleton
- (instancetype)autorelease
{
return self;
}
- (instancetype)retain
{
return self;
}
- (void)release
{
}
- (unsigned int)retainCount
{
return OFMaxRetainCount;
}
@end
@implementation OFConcreteColor
- (instancetype)initWithRed: (float)red
green: (float)green
blue: (float)blue
alpha: (float)alpha
{
self = [super init];
@try {
if (red < 0.0 || red > 1.0 ||
green < 0.0 || green > 1.0 ||
blue < 0.0 || blue > 1.0 ||
alpha < 0.0 || alpha > 1.0)
@throw [OFInvalidArgumentException exception];
_red = red;
_green = green;
_blue = blue;
_alpha = alpha;
} @catch (id e) {
[self release];
@throw e;
}
return self;
}
- (void)getRed: (float *)red
green: (float *)green
blue: (float *)blue
alpha: (float *)alpha
{
*red = _red;
*green = _green;
*blue = _blue;
if (alpha != NULL)
*alpha = _alpha;
}
@end
#ifdef OF_OBJFW_RUNTIME
@implementation OFTaggedPointerColor
- (void)getRed: (float *)red
green: (float *)green
blue: (float *)blue
alpha: (float *)alpha
{
uintptr_t value = object_getTaggedPointerValue(self);
*red = (float)(value >> 16) / 255;
*green = (float)((value >> 8) & 0xFF) / 255;
*blue = (float)(value & 0xFF) / 255;
if (alpha != NULL)
*alpha = 1;
}
@end
#endif
@implementation OFColor
+ (void)initialize
{
if (self != [OFColor class])
return;
object_setClass((id)&placeholder, [OFColorPlaceholder class]);
#ifdef OF_OBJFW_RUNTIME
colorTag =
objc_registerTaggedPointerClass([OFTaggedPointerColor class]);
#endif
}
+ (instancetype)alloc
{
if (self == [OFColor class])
return (id)&placeholder;
return [super alloc];
}
#define PREDEFINED_COLOR(name, redValue, greenValue, blueValue) \
static OFColor *name##Color = nil; \
\
static void \
initPredefinedColor_##name(void) \
{ \
name##Color = [[OFColorSingleton alloc] \
initWithRed: redValue \
green: greenValue \
blue: blueValue \
alpha: 1]; \
} \
\
+ (OFColor *)name \
{ \
static OFOnceControl onceControl = OFOnceControlInitValue; \
OFOnce(&onceControl, initPredefinedColor_##name); \
\
return name##Color; \
}
PREDEFINED_COLOR(black, 0.00f, 0.00f, 0.00f)
PREDEFINED_COLOR(silver, 0.75f, 0.75f, 0.75f)
PREDEFINED_COLOR(grey, 0.50f, 0.50f, 0.50f)
PREDEFINED_COLOR(white, 1.00f, 1.00f, 1.00f)
PREDEFINED_COLOR(maroon, 0.50f, 0.00f, 0.00f)
PREDEFINED_COLOR(red, 1.00f, 0.00f, 0.00f)
PREDEFINED_COLOR(purple, 0.50f, 0.00f, 0.50f)
PREDEFINED_COLOR(fuchsia, 1.00f, 0.00f, 1.00f)
PREDEFINED_COLOR(green, 0.00f, 0.50f, 0.00f)
PREDEFINED_COLOR(lime, 0.00f, 1.00f, 0.00f)
PREDEFINED_COLOR(olive, 0.50f, 0.50f, 0.00f)
PREDEFINED_COLOR(yellow, 1.00f, 1.00f, 0.00f)
PREDEFINED_COLOR(navy, 0.00f, 0.00f, 0.50f)
PREDEFINED_COLOR(blue, 0.00f, 0.00f, 1.00f)
PREDEFINED_COLOR(teal, 0.00f, 0.50f, 0.50f)
PREDEFINED_COLOR(aqua, 0.00f, 1.00f, 1.00f)
+ (instancetype)colorWithRed: (float)red
green: (float)green
blue: (float)blue
alpha: (float)alpha
{
return [[[self alloc] initWithRed: red
green: green
blue: blue
alpha: alpha] autorelease];
}
- (instancetype)initWithRed: (float)red
green: (float)green
blue: (float)blue
alpha: (float)alpha
{
if ([self isMemberOfClass: [OFColor class]]) {
@try {
[self doesNotRecognizeSelector: _cmd];
} @catch (id e) {
[self release];
@throw e;
}
abort();
}
return [super init];
}
- (bool)isEqual: (id)object
{
OFColor *other;
float red, green, blue, alpha;
float otherRed, otherGreen, otherBlue, otherAlpha;
if (object == self)
return true;
if (![object isKindOfClass: [OFColor class]])
return false;
other = object;
[self getRed: &red green: &green blue: &blue alpha: &alpha];
[other getRed: &otherRed
green: &otherGreen
blue: &otherBlue
alpha: &otherAlpha];
if (otherRed != red)
return false;
if (otherGreen != green)
return false;
if (otherBlue != blue)
return false;
if (otherAlpha != alpha)
return false;
return true;
}
- (unsigned long)hash
{
float red, green, blue, alpha;
unsigned long hash;
float tmp;
[self getRed: &red green: &green blue: &blue alpha: &alpha];
OFHashInit(&hash);
tmp = OFToLittleEndianFloat(red);
for (uint_fast8_t i = 0; i < sizeof(float); i++)
OFHashAddByte(&hash, ((char *)&tmp)[i]);
tmp = OFToLittleEndianFloat(green);
for (uint_fast8_t i = 0; i < sizeof(float); i++)
OFHashAddByte(&hash, ((char *)&tmp)[i]);
tmp = OFToLittleEndianFloat(blue);
for (uint_fast8_t i = 0; i < sizeof(float); i++)
OFHashAddByte(&hash, ((char *)&tmp)[i]);
tmp = OFToLittleEndianFloat(alpha);
for (uint_fast8_t i = 0; i < sizeof(float); i++)
OFHashAddByte(&hash, ((char *)&tmp)[i]);
OFHashFinalize(&hash);
return hash;
}
- (void)getRed: (float *)red
green: (float *)green
blue: (float *)blue
alpha: (float *)alpha
{
OF_UNRECOGNIZED_SELECTOR
}
- (OFString *)description
{
float red, green, blue, alpha;
[self getRed: &red green: &green blue: &blue alpha: &alpha];
return [OFString stringWithFormat:
@"<%@ red=%f green=%f blue=%f alpha=%f>",
self.class, red, green, blue, alpha];
}
@end