зеркало из https://github.com/mozilla/gecko-dev.git
566 строки
14 KiB
C++
566 строки
14 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "plstr.h"
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#include "nsColor.h"
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#include "nsColorNames.h"
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#include "nsString.h"
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#include "nscore.h"
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#include "nsCoord.h"
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#include "nsUnitConversion.h"
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#include "nsCOMPtr.h"
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#include "nsIServiceManager.h"
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#include "nsIScreen.h"
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#include "nsIScreenManager.h"
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#include <math.h>
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static int ComponentValue(const char* aColorSpec, int aLen, int color, int dpc)
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{
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int component = 0;
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int index = (color * dpc);
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if (2 < dpc) {
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dpc = 2;
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}
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while (--dpc >= 0) {
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char ch = ((index < aLen) ? aColorSpec[index++] : '0');
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if (('0' <= ch) && (ch <= '9')) {
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component = (component * 16) + (ch - '0');
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} else if ((('a' <= ch) && (ch <= 'f')) ||
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(('A' <= ch) && (ch <= 'F'))) {
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// "ch&7" handles lower and uppercase hex alphabetics
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component = (component * 16) + (ch & 7) + 9;
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}
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else { // not a hex digit, treat it like 0
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component = (component * 16);
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}
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}
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return component;
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}
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extern "C" NS_GFX_(PRBool) NS_HexToRGB(const nsString& aColorSpec, nscolor* aResult)
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{
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// XXXldb nsStackString<10>
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NS_LossyConvertUCS2toASCII bufferStr(aColorSpec);
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const char* buffer = bufferStr.get();
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int nameLen = bufferStr.Length();
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if ((nameLen == 3) || (nameLen == 6)) {
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// Make sure the digits are legal
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for (int i = 0; i < nameLen; i++) {
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char ch = buffer[i];
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if (((ch >= '0') && (ch <= '9')) ||
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((ch >= 'a') && (ch <= 'f')) ||
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((ch >= 'A') && (ch <= 'F'))) {
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// Legal character
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continue;
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}
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// Whoops. Illegal character.
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return PR_FALSE;
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}
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// Convert the ascii to binary
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int dpc = ((3 == nameLen) ? 1 : 2);
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// Translate components from hex to binary
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int r = ComponentValue(buffer, nameLen, 0, dpc);
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int g = ComponentValue(buffer, nameLen, 1, dpc);
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int b = ComponentValue(buffer, nameLen, 2, dpc);
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if (dpc == 1) {
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// Scale single digit component to an 8 bit value. Replicate the
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// single digit to compute the new value.
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r = (r << 4) | r;
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g = (g << 4) | g;
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b = (b << 4) | b;
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}
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NS_ASSERTION((r >= 0) && (r <= 255), "bad r");
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NS_ASSERTION((g >= 0) && (g <= 255), "bad g");
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NS_ASSERTION((b >= 0) && (b <= 255), "bad b");
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if (nsnull != aResult) {
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*aResult = NS_RGB(r, g, b);
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}
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return PR_TRUE;
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}
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// Improperly formatted color value
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return PR_FALSE;
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}
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// compatible with legacy Nav behavior
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extern "C" NS_GFX_(PRBool) NS_LooseHexToRGB(const nsString& aColorSpec, nscolor* aResult)
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{
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// XXXldb nsStackString<30>
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NS_LossyConvertUCS2toASCII buffer(aColorSpec);
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int nameLen = buffer.Length();
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const char* colorSpec = buffer.get();
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if ('#' == colorSpec[0]) {
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++colorSpec;
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--nameLen;
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}
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if (3 < nameLen) {
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// Convert the ascii to binary
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int dpc = (nameLen / 3) + (((nameLen % 3) != 0) ? 1 : 0);
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if (4 < dpc) {
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dpc = 4;
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}
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// Translate components from hex to binary
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int r = ComponentValue(colorSpec, nameLen, 0, dpc);
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int g = ComponentValue(colorSpec, nameLen, 1, dpc);
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int b = ComponentValue(colorSpec, nameLen, 2, dpc);
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NS_ASSERTION((r >= 0) && (r <= 255), "bad r");
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NS_ASSERTION((g >= 0) && (g <= 255), "bad g");
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NS_ASSERTION((b >= 0) && (b <= 255), "bad b");
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if (nsnull != aResult) {
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*aResult = NS_RGB(r, g, b);
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}
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}
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else {
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if (nsnull != aResult) {
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*aResult = NS_RGB(0, 0, 0);
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}
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}
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return PR_TRUE;
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}
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extern "C" NS_GFX_(PRBool) NS_ColorNameToRGB(const nsAString& aColorName, nscolor* aResult)
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{
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nsColorName id = nsColorNames::LookupName(aColorName);
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if (eColorName_UNKNOWN < id) {
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NS_ASSERTION(id < eColorName_COUNT, "LookupName mess up");
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if (nsnull != aResult) {
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*aResult = nsColorNames::kColors[id];
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}
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return PR_TRUE;
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}
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return PR_FALSE;
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}
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// Weird color computing code stolen from winfe which was stolen
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// from the xfe which was written originally by Eric Bina. So there.
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#define RED_LUMINOSITY 30
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#define GREEN_LUMINOSITY 59
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#define BLUE_LUMINOSITY 11
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#define INTENSITY_FACTOR 25
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#define LIGHT_FACTOR 0
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#define LUMINOSITY_FACTOR 75
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#define MAX_COLOR 255
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#define COLOR_DARK_THRESHOLD 51
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#define COLOR_LIGHT_THRESHOLD 204
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#define COLOR_LITE_BS_FACTOR 45
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#define COLOR_LITE_TS_FACTOR 70
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#define COLOR_DARK_BS_FACTOR 30
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#define COLOR_DARK_TS_FACTOR 50
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#define LIGHT_GRAY NS_RGB(192, 192, 192)
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#define DARK_GRAY NS_RGB(128, 128, 128)
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#define WHITE NS_RGB(255, 255, 255)
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#define BLACK NS_RGB(0, 0, 0)
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#define MAX_BRIGHTNESS 254
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#define MAX_DARKNESS 0
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extern "C" NS_GFX_(void) NS_Get3DColors(nscolor aResult[2], nscolor aColor)
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{
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int rb = NS_GET_R(aColor);
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int gb = NS_GET_G(aColor);
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int bb = NS_GET_B(aColor);
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int intensity = (rb + gb + bb) / 3;
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int luminosity =
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((RED_LUMINOSITY * rb) / 100) +
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((GREEN_LUMINOSITY * gb) / 100) +
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((BLUE_LUMINOSITY * bb) / 100);
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int brightness = ((intensity * INTENSITY_FACTOR) +
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(luminosity * LUMINOSITY_FACTOR)) / 100;
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int f0, f1;
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if (brightness < COLOR_DARK_THRESHOLD) {
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f0 = COLOR_DARK_BS_FACTOR;
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f1 = COLOR_DARK_TS_FACTOR;
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} else if (brightness > COLOR_LIGHT_THRESHOLD) {
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f0 = COLOR_LITE_BS_FACTOR;
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f1 = COLOR_LITE_TS_FACTOR;
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} else {
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f0 = COLOR_DARK_BS_FACTOR +
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(brightness *
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(COLOR_LITE_BS_FACTOR - COLOR_DARK_BS_FACTOR) / MAX_COLOR);
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f1 = COLOR_DARK_TS_FACTOR +
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(brightness *
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(COLOR_LITE_TS_FACTOR - COLOR_DARK_TS_FACTOR) / MAX_COLOR);
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}
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int r = rb - (f0 * rb / 100);
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int g = gb - (f0 * gb / 100);
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int b = bb - (f0 * bb / 100);
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aResult[0] = NS_RGB(r, g, b);
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if ((r == rb) && (g == gb) && (b == bb)) {
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aResult[0] = (aColor == LIGHT_GRAY) ? WHITE : LIGHT_GRAY;
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}
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r = rb + (f1 * (MAX_COLOR - rb) / 100);
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if (r > 255) r = 255;
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g = gb + (f1 * (MAX_COLOR - gb) / 100);
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if (g > 255) g = 255;
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b = bb + (f1 * (MAX_COLOR - bb) / 100);
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if (b > 255) b = 255;
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aResult[1] = NS_RGB(r, g, b);
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if ((r == rb) && (g == gb) && (b == bb)) {
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aResult[1] = (aColor == DARK_GRAY) ? BLACK : DARK_GRAY;
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}
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}
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extern "C" NS_GFX_(void) NS_GetSpecial3DColors(nscolor aResult[2],
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nscolor aBackgroundColor,
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nscolor aBorderColor)
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{
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PRUint8 f0, f1;
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PRUint8 r, g, b;
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PRUint8 rb = NS_GET_R(aBorderColor);
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PRUint8 gb = NS_GET_G(aBorderColor);
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PRUint8 bb = NS_GET_B(aBorderColor);
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// This needs to be optimized.
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// Calculating background brightness again and again is
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// a waste of time!!!. Just calculate it only once.
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// .....somehow!!!
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PRUint8 red = NS_GET_R(aBackgroundColor);
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PRUint8 green = NS_GET_G(aBackgroundColor);
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PRUint8 blue = NS_GET_B(aBackgroundColor);
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PRUint8 elementBrightness = NS_GetBrightness(rb,gb,bb);
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PRUint8 backgroundBrightness = NS_GetBrightness(red, green, blue);
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if (backgroundBrightness < COLOR_DARK_THRESHOLD) {
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f0 = COLOR_DARK_BS_FACTOR;
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f1 = COLOR_DARK_TS_FACTOR;
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if(elementBrightness == MAX_DARKNESS)
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{
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rb = NS_GET_R(DARK_GRAY);
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gb = NS_GET_G(DARK_GRAY);
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bb = NS_GET_B(DARK_GRAY);
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}
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}else if (backgroundBrightness > COLOR_LIGHT_THRESHOLD) {
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f0 = COLOR_LITE_BS_FACTOR;
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f1 = COLOR_LITE_TS_FACTOR;
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if(elementBrightness == MAX_BRIGHTNESS)
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{
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rb = NS_GET_R(LIGHT_GRAY);
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gb = NS_GET_G(LIGHT_GRAY);
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bb = NS_GET_B(LIGHT_GRAY);
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}
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}else {
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f0 = COLOR_DARK_BS_FACTOR +
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(backgroundBrightness *
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(COLOR_LITE_BS_FACTOR - COLOR_DARK_BS_FACTOR) / MAX_COLOR);
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f1 = COLOR_DARK_TS_FACTOR +
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(backgroundBrightness *
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(COLOR_LITE_TS_FACTOR - COLOR_DARK_TS_FACTOR) / MAX_COLOR);
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}
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r = rb - (f0 * rb / 100);
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g = gb - (f0 * gb / 100);
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b = bb - (f0 * bb / 100);
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aResult[0] = NS_RGB(r, g, b);
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r = rb + (f1 * (MAX_COLOR - rb) / 100);
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if (r > 255) r = 255;
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g = gb + (f1 * (MAX_COLOR - gb) / 100);
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if (g > 255) g = 255;
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b = bb + (f1 * (MAX_COLOR - bb) / 100);
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if (b > 255) b = 255;
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aResult[1] = NS_RGB(r, g, b);
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}
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extern "C" NS_GFX_(int) NS_GetBrightness(PRUint8 aRed, PRUint8 aGreen, PRUint8 aBlue)
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{
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PRUint8 intensity = (aRed + aGreen + aBlue) / 3;
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PRUint8 luminosity =
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((RED_LUMINOSITY * aRed) / 100) +
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((GREEN_LUMINOSITY * aGreen) / 100) +
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((BLUE_LUMINOSITY * aBlue) / 100);
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return ((intensity * INTENSITY_FACTOR) +
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(luminosity * LUMINOSITY_FACTOR)) / 100;
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}
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extern "C" NS_GFX_(nscolor) NS_BrightenColor(nscolor inColor)
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{
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PRIntn r, g, b, max, over;
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r = NS_GET_R(inColor);
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g = NS_GET_G(inColor);
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b = NS_GET_B(inColor);
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//10% of max color increase across the board
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r += 25;
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g += 25;
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b += 25;
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//figure out which color is largest
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if (r > g)
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{
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if (b > r)
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max = b;
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else
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max = r;
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}
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else
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{
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if (b > g)
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max = b;
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else
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max = g;
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}
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//if we overflowed on this max color, increase
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//other components by the overflow amount
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if (max > 255)
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{
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over = max - 255;
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if (max == r)
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{
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g += over;
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b += over;
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}
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else if (max == g)
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{
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r += over;
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b += over;
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}
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else
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{
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r += over;
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g += over;
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}
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}
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//clamp
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if (r > 255)
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r = 255;
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if (g > 255)
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g = 255;
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if (b > 255)
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b = 255;
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return NS_RGBA(r, g, b, NS_GET_A(inColor));
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}
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extern "C" NS_GFX_(nscolor) NS_DarkenColor(nscolor inColor)
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{
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PRIntn r, g, b, max;
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r = NS_GET_R(inColor);
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g = NS_GET_G(inColor);
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b = NS_GET_B(inColor);
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//10% of max color decrease across the board
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r -= 25;
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g -= 25;
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b -= 25;
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//figure out which color is largest
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if (r > g)
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{
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if (b > r)
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max = b;
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else
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max = r;
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}
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else
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{
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if (b > g)
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max = b;
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else
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max = g;
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}
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//if we underflowed on this max color, decrease
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//other components by the underflow amount
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if (max < 0)
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{
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if (max == r)
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{
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g += max;
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b += max;
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}
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else if (max == g)
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{
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r += max;
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b += max;
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}
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else
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{
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r += max;
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g += max;
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}
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}
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//clamp
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if (r < 0)
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r = 0;
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if (g < 0)
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g = 0;
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if (b < 0)
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b = 0;
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return NS_RGBA(r, g, b, NS_GET_A(inColor));
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}
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// Function to convert RGB color space into the HSV colorspace
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// Hue is the primary color defined from 0 to 359 degrees
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// Saturation is defined from 0 to 255. The higher the number.. the deeper the color
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// Value is the brightness of the color. 0 is black, 255 is white.
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extern "C" NS_GFX_(void)
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NS_RGB2HSV(nscolor aColor,PRUint16 &aHue,PRUint16 &aSat,PRUint16 &aValue)
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{
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PRUint8 r,g,b;
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PRInt16 delta,min,max,r1,b1,g1;
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float hue;
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r = NS_GET_R(aColor);
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g = NS_GET_G(aColor);
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b = NS_GET_B(aColor);
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if (r>g) {
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max = r;
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min = g;
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} else {
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max = g;
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min = r;
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}
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if (b>max) {
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max = b;
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}
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if (b<min) {
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min = b;
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}
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// value or brightness will always be the max of all the colors(RGB)
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aValue = max;
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delta = max-min;
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aSat = (max!=0)?((delta*255)/max):0;
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r1 = r;
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b1 = b;
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g1 = g;
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if (aSat==0) {
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hue = 1000;
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} else {
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if(r==max){
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hue=(float)(g1-b1)/(float)delta;
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} else if (g1==max) {
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hue= 2.0f+(float)(b1-r1)/(float)delta;
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} else {
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hue = 4.0f+(float)(r1-g1)/(float)delta;
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}
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}
|
|
|
|
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.
|
|
extern "C" NS_GFX_(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);
|
|
}
|