/*
* Copyright (C) 2003 Apple Computer, Inc. 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 APPLE COMPUTER, INC. ``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 APPLE COMPUTER, INC. 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 "KWQColor.h"
#import "KWQNamespace.h"
#import "KWQString.h"
#import "KWQAssertions.h"
// NSColor calls don't throw, so no need to block Cocoa exceptions in this file
// Turn off inlining to avoid warning with newer gcc.
#undef __inline
#define __inline
#import "KWQColorData.c"
#undef __inline
QRgb qRgb(int r, int g, int b)
{
if (r < 0) r = 0; else if (r > 255) r = 255;
if (g < 0) g = 0; else if (g > 255) g = 255;
if (b < 0) b = 0; else if (b > 255) b = 255;
return (r << 16 | g << 8 | b) | 0xFF000000;
}
QRgb qRgba(int r, int g, int b, int a)
{
if (r < 0) r = 0; else if (r > 255) r = 255;
if (g < 0) g = 0; else if (g > 255) g = 255;
if (b < 0) b = 0; else if (b > 255) b = 255;
if (a < 0) a = 0; else if (a > 255) a = 255;
return (a << 24 | r << 16 | g << 8 | b);
}
int qAlpha(QRgb rgba)
{
return (rgba >> 24) & 0xFF;
}
QColor::QColor(const char *name)
{
const Color *foundColor = findColor(name, strlen(name));
color = foundColor ? foundColor->RGBValue : 0;
color |= 0xFF000000;
valid = foundColor;
}
QString QColor::name() const
{
QString name;
if (qAlpha(color) < 0xFF)
name.sprintf("#%02X%02X%02X%02X", red(), green(), blue(), qAlpha(color));
else
name.sprintf("#%02X%02X%02X", red(), green(), blue());
return name;
}
void QColor::setNamedColor(const QString &name)
{
const Color *foundColor = name.isAllASCII() ? findColor(name.latin1(), name.length()) : 0;
color = foundColor ? foundColor->RGBValue : 0;
color |= 0xFF000000;
valid = foundColor;
}
void QColor::hsv(int *h, int *s, int *v) const
{
int r = red();
int g = green();
int b = blue();
int i, w, x, f;
x = w = r;
if (g > x) {
x = g;
}
if (g < w) {
w = g;
}
if (b > x) {
x = b;
}
if (b < w) {
w = b;
}
if (w == x) {
*h = -1;
*s = 0;
*v = w;
}
else {
f = (r == x) ? g - b : ((g == x) ? b - r : r - g);
i = (r == x) ? 3 : ((g == x) ? 5 : 1);
*h = i - f /(w - x);
if (w != 0)
*s = (w - x)/w;
else
*s = 0;
*v = w;
}
}
void QColor::setHsv(int h, int s, int v)
{
int i, f, p, q, t;
if( s == 0 ) {
// achromatic (gray)
setRgb(v, v, v);
return;
}
h /= 60; // sector 0 to 5
i = (int)floor(h);
f = h - i; // factorial part of h
p = v * (1 - s);
q = v * (1 - s * f);
t = v * (1 - s * (1 - f));
switch( i ) {
case 0:
setRgb(v, t, p);
break;
case 1:
setRgb(q, v, p);
break;
case 2:
setRgb(p, v, t);
break;
case 3:
setRgb(p, q, v);
break;
case 4:
setRgb(t, p, v);
break;
default: // case 5:
setRgb(v, p, q);
break;
}
}
QColor QColor::light(int factor) const
{
if (factor <= 0) {
return QColor(*this);
}
else if (factor < 100) {
// NOTE: this is actually a darken operation
return dark(10000 / factor);
}
int h, s, v;
hsv(&h, &s, &v);
v = (factor * v) / 100;
if (v > 255) {
s -= (v - 255);
if (s < 0) {
s = 0;
}
v = 255;
}
QColor result;
result.setHsv(h, s, v);
return result;
}
QColor QColor::dark(int factor) const
{
if (factor <= 0) {
return QColor(*this);
}
else if (factor < 100) {
// NOTE: this is actually a lighten operation
return light(10000 / factor);
}
int h, s, v;
hsv(&h, &s, &v);
v = (v * 100) / factor;
QColor result;
result.setHsv(h, s, v);
return result;
}
NSColor *QColor::getNSColor() const
{
unsigned c = color & 0xFFFFFFFF;
switch (c) {
case 0: {
// Need this to avoid returning nil because cachedRGBAValues will default to 0.
static NSColor *clearColor = [[NSColor clearColor] retain];
return clearColor;
}
case Qt::black: {
static NSColor *blackColor = [[NSColor blackColor] retain];
return blackColor;
}
case Qt::white: {
static NSColor *whiteColor = [[NSColor whiteColor] retain];
return whiteColor;
}
default: {
const int cacheSize = 32;
static unsigned cachedRGBAValues[cacheSize];
static NSColor *cachedColors[cacheSize];
for (int i = 0; i != cacheSize; ++i) {
if (cachedRGBAValues[i] == c) {
return cachedColors[i];
}
}
#if COLORMATCH_EVERYTHING
NSColor *result = [NSColor colorWithCalibratedRed:red() / 255.0
green:green() / 255.0
blue:blue() / 255.0
alpha:qAlpha(color)/255.0];
#else
NSColor *result = [NSColor colorWithDeviceRed:red() / 255.0
green:green() / 255.0
blue:blue() / 255.0
alpha:qAlpha(color)/255.0];
#endif
static int cursor;
cachedRGBAValues[cursor] = c;
[cachedColors[cursor] autorelease];
cachedColors[cursor] = [result retain];
if (++cursor == cacheSize) {
cursor = 0;
}
return result;
}
}
}