зеркало из https://github.com/mozilla/pjs.git
301 строка
8.7 KiB
C++
301 строка
8.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Netscape Public License
|
|
* Version 1.1 (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.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
*
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the NPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the NPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#include "nsCSSColorUtils.h"
|
|
#include <math.h>
|
|
|
|
// Weird color computing code stolen from winfe which was stolen
|
|
// from the xfe which was written originally by Eric Bina. So there.
|
|
|
|
#define RED_LUMINOSITY 30
|
|
#define GREEN_LUMINOSITY 59
|
|
#define BLUE_LUMINOSITY 11
|
|
#define INTENSITY_FACTOR 25
|
|
#define LIGHT_FACTOR 0
|
|
#define LUMINOSITY_FACTOR 75
|
|
|
|
#define MAX_COLOR 255
|
|
#define COLOR_DARK_THRESHOLD 51
|
|
#define COLOR_LIGHT_THRESHOLD 204
|
|
|
|
#define COLOR_LITE_BS_FACTOR 45
|
|
#define COLOR_LITE_TS_FACTOR 70
|
|
|
|
#define COLOR_DARK_BS_FACTOR 30
|
|
#define COLOR_DARK_TS_FACTOR 50
|
|
|
|
#define LIGHT_GRAY NS_RGB(192, 192, 192)
|
|
#define DARK_GRAY NS_RGB(96, 96, 96)
|
|
#define WHITE NS_RGB(255, 255, 255)
|
|
#define BLACK NS_RGB(0, 0, 0)
|
|
|
|
#define MAX_BRIGHTNESS 254
|
|
#define MAX_DARKNESS 0
|
|
|
|
void NS_Get3DColors(nscolor aResult[2], nscolor aBackgroundColor)
|
|
{
|
|
int rb = NS_GET_R(aBackgroundColor);
|
|
int gb = NS_GET_G(aBackgroundColor);
|
|
int bb = NS_GET_B(aBackgroundColor);
|
|
|
|
int brightness = NS_GetBrightness(rb,gb,bb);
|
|
|
|
int f0, f1;
|
|
if (brightness < COLOR_DARK_THRESHOLD) {
|
|
f0 = COLOR_DARK_BS_FACTOR;
|
|
f1 = COLOR_DARK_TS_FACTOR;
|
|
} else if (brightness > COLOR_LIGHT_THRESHOLD) {
|
|
f0 = COLOR_LITE_BS_FACTOR;
|
|
f1 = COLOR_LITE_TS_FACTOR;
|
|
} else {
|
|
f0 = COLOR_DARK_BS_FACTOR +
|
|
(brightness *
|
|
(COLOR_LITE_BS_FACTOR - COLOR_DARK_BS_FACTOR) / MAX_COLOR);
|
|
f1 = COLOR_DARK_TS_FACTOR +
|
|
(brightness *
|
|
(COLOR_LITE_TS_FACTOR - COLOR_DARK_TS_FACTOR) / MAX_COLOR);
|
|
}
|
|
|
|
int r = rb - (f0 * rb / 100);
|
|
int g = gb - (f0 * gb / 100);
|
|
int b = bb - (f0 * bb / 100);
|
|
aResult[0] = NS_RGB(r, g, b);
|
|
if ((r == rb) && (g == gb) && (b == bb)) {
|
|
aResult[0] = (aBackgroundColor == BLACK) ? DARK_GRAY : BLACK;
|
|
}
|
|
|
|
r = rb + (f1 * (MAX_COLOR - rb) / 100);
|
|
if (r > 255) r = 255;
|
|
g = gb + (f1 * (MAX_COLOR - gb) / 100);
|
|
if (g > 255) g = 255;
|
|
b = bb + (f1 * (MAX_COLOR - bb) / 100);
|
|
if (b > 255) b = 255;
|
|
aResult[1] = NS_RGB(r, g, b);
|
|
if ((r == rb) && (g == gb) && (b == bb)) {
|
|
aResult[1] = (aBackgroundColor == WHITE) ? LIGHT_GRAY : WHITE;
|
|
}
|
|
}
|
|
|
|
void NS_GetSpecial3DColors(nscolor aResult[2],
|
|
nscolor aBackgroundColor,
|
|
nscolor aBorderColor)
|
|
{
|
|
|
|
PRUint8 f0, f1;
|
|
PRUint8 r, g, b;
|
|
|
|
PRUint8 rb = NS_GET_R(aBorderColor);
|
|
PRUint8 gb = NS_GET_G(aBorderColor);
|
|
PRUint8 bb = NS_GET_B(aBorderColor);
|
|
|
|
// This needs to be optimized.
|
|
// Calculating background brightness again and again is
|
|
// a waste of time!!!. Just calculate it only once.
|
|
// .....somehow!!!
|
|
|
|
PRUint8 red = NS_GET_R(aBackgroundColor);
|
|
PRUint8 green = NS_GET_G(aBackgroundColor);
|
|
PRUint8 blue = NS_GET_B(aBackgroundColor);
|
|
|
|
PRUint8 elementBrightness = NS_GetBrightness(rb,gb,bb);
|
|
PRUint8 backgroundBrightness = NS_GetBrightness(red, green, blue);
|
|
|
|
|
|
if (backgroundBrightness < COLOR_DARK_THRESHOLD) {
|
|
f0 = COLOR_DARK_BS_FACTOR;
|
|
f1 = COLOR_DARK_TS_FACTOR;
|
|
if(elementBrightness == MAX_DARKNESS)
|
|
{
|
|
rb = NS_GET_R(DARK_GRAY);
|
|
gb = NS_GET_G(DARK_GRAY);
|
|
bb = NS_GET_B(DARK_GRAY);
|
|
}
|
|
}else if (backgroundBrightness > COLOR_LIGHT_THRESHOLD) {
|
|
f0 = COLOR_LITE_BS_FACTOR;
|
|
f1 = COLOR_LITE_TS_FACTOR;
|
|
if(elementBrightness == MAX_BRIGHTNESS)
|
|
{
|
|
rb = NS_GET_R(LIGHT_GRAY);
|
|
gb = NS_GET_G(LIGHT_GRAY);
|
|
bb = NS_GET_B(LIGHT_GRAY);
|
|
}
|
|
}else {
|
|
f0 = COLOR_DARK_BS_FACTOR +
|
|
(backgroundBrightness *
|
|
(COLOR_LITE_BS_FACTOR - COLOR_DARK_BS_FACTOR) / MAX_COLOR);
|
|
f1 = COLOR_DARK_TS_FACTOR +
|
|
(backgroundBrightness *
|
|
(COLOR_LITE_TS_FACTOR - COLOR_DARK_TS_FACTOR) / MAX_COLOR);
|
|
}
|
|
|
|
|
|
r = rb - (f0 * rb / 100);
|
|
g = gb - (f0 * gb / 100);
|
|
b = bb - (f0 * bb / 100);
|
|
aResult[0] = NS_RGB(r, g, b);
|
|
|
|
r = rb + (f1 * (MAX_COLOR - rb) / 100);
|
|
g = gb + (f1 * (MAX_COLOR - gb) / 100);
|
|
b = bb + (f1 * (MAX_COLOR - bb) / 100);
|
|
aResult[1] = NS_RGB(r, g, b);
|
|
}
|
|
|
|
int NS_GetBrightness(PRUint8 aRed, PRUint8 aGreen, PRUint8 aBlue)
|
|
{
|
|
|
|
PRUint8 intensity = (aRed + aGreen + aBlue) / 3;
|
|
|
|
PRUint8 luminosity =
|
|
((RED_LUMINOSITY * aRed) / 100) +
|
|
((GREEN_LUMINOSITY * aGreen) / 100) +
|
|
((BLUE_LUMINOSITY * aBlue) / 100);
|
|
|
|
return ((intensity * INTENSITY_FACTOR) +
|
|
(luminosity * LUMINOSITY_FACTOR)) / 100;
|
|
}
|
|
|
|
// Function to convert RGB color space into the HSV colorspace
|
|
// Hue is the primary color defined from 0 to 359 degrees
|
|
// Saturation is defined from 0 to 255. The higher the number.. the deeper the color
|
|
// Value is the brightness of the color. 0 is black, 255 is white.
|
|
void
|
|
NS_RGB2HSV(nscolor aColor,PRUint16 &aHue,PRUint16 &aSat,PRUint16 &aValue)
|
|
{
|
|
PRUint8 r,g,b;
|
|
PRInt16 delta,min,max,r1,b1,g1;
|
|
float hue;
|
|
|
|
r = NS_GET_R(aColor);
|
|
g = NS_GET_G(aColor);
|
|
b = NS_GET_B(aColor);
|
|
|
|
if (r>g) {
|
|
max = r;
|
|
min = g;
|
|
} else {
|
|
max = g;
|
|
min = r;
|
|
}
|
|
|
|
if (b>max) {
|
|
max = b;
|
|
}
|
|
if (b<min) {
|
|
min = b;
|
|
}
|
|
|
|
// value or brightness will always be the max of all the colors(RGB)
|
|
aValue = max;
|
|
delta = max-min;
|
|
aSat = (max!=0)?((delta*255)/max):0;
|
|
r1 = r;
|
|
b1 = b;
|
|
g1 = g;
|
|
|
|
if (aSat==0) {
|
|
hue = 1000;
|
|
} else {
|
|
if(r==max){
|
|
hue=(float)(g1-b1)/(float)delta;
|
|
} else if (g1==max) {
|
|
hue= 2.0f+(float)(b1-r1)/(float)delta;
|
|
} else {
|
|
hue = 4.0f+(float)(r1-g1)/(float)delta;
|
|
}
|
|
}
|
|
|
|
if(hue<999) {
|
|
hue*=60;
|
|
if(hue<0){
|
|
hue+=360;
|
|
}
|
|
} else {
|
|
hue=0;
|
|
}
|
|
|
|
aHue = (PRUint16)hue;
|
|
}
|
|
|
|
// Function to convert HSV color space into the RGB colorspace
|
|
// Hue is the primary color defined from 0 to 359 degrees
|
|
// Saturation is defined from 0 to 255. The higher the number.. the deeper the color
|
|
// Value is the brightness of the color. 0 is black, 255 is white.
|
|
void
|
|
NS_HSV2RGB(nscolor &aColor,PRUint16 aHue,PRUint16 aSat,PRUint16 aValue)
|
|
{
|
|
PRUint16 r=0,g=0,b=0;
|
|
PRUint16 i,p,q,t;
|
|
double h,f,percent;
|
|
|
|
if ( aSat == 0 ){
|
|
// achromatic color, no hue is defined
|
|
r = aValue;
|
|
g = aValue;
|
|
b = aValue;
|
|
} else {
|
|
// hue in in degrees around the color wheel defined from
|
|
// 0 to 360 degrees.
|
|
if (aHue >= 360) {
|
|
aHue = 0;
|
|
}
|
|
|
|
// we break the color wheel into 6 areas.. these
|
|
// areas define how the saturation and value define the color.
|
|
// reds behave differently than the blues
|
|
h = (double)aHue / 60.0;
|
|
i = (PRUint16) floor(h);
|
|
f = h-(double)i;
|
|
percent = ((double)aValue/255.0); // this needs to be a value from 0 to 1, so a percentage
|
|
// can be calculated of the saturation.
|
|
p = (PRUint16)(percent*(255-aSat));
|
|
q = (PRUint16)(percent*(255-(aSat*f)));
|
|
t = (PRUint16)(percent*(255-(aSat*(1.0-f))));
|
|
|
|
// i is guarenteed to never be larger than 5.
|
|
switch(i){
|
|
case 0: r = aValue; g = t; b = p;break;
|
|
case 1: r = q; g = aValue; b = p;break;
|
|
case 2: r = p; g = aValue; b = t;break;
|
|
case 3: r = p; g = q; b = aValue;break;
|
|
case 4: r = t; g = p; b = aValue;break;
|
|
case 5: r = aValue; g = p; b = q;break;
|
|
}
|
|
}
|
|
aColor = NS_RGB(r,g,b);
|
|
}
|