--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/gfxconversion/bmconv_s60/src/RGB.CPP Tue Feb 02 01:11:11 2010 +0200
@@ -0,0 +1,263 @@
+/*
+* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:
+*
+*/
+
+#include "BMCONV.H"
+#include "RGB.H"
+
+extern TRgb* color256Palette;
+extern char* color256InversePalette;
+
+TRgb* color256Palette = NULL;
+char* color256InversePalette = NULL;
+
+TRgb::TRgb()
+ : iRed(255),iGreen(255),iBlue(255),iSpare(0)
+/** Constructs default TRgb with all 3 colour components set to 255. */
+ {}
+
+TRgb::TRgb(long unsigned int val)
+ : iRed((unsigned char)(val&0xff)),iGreen((unsigned char)((val>>8)&0xff)),iBlue((unsigned char)((val>>16)&0xff)),iSpare(0)
+ {}
+
+TRgb::TRgb(int r,int g,int b)
+ : iRed((unsigned char)r),iGreen((unsigned char)g),iBlue((unsigned char)b),iSpare(0)
+/** Constructs a TRgb from its three component colours.
+
+Each colour has a value between 0 and 255.
+
+@param aRed Red component of the colour (0 - 255).
+@param aGreen Green component of the colour (0 - 255).
+@param aBlue Blue component of the colour (0 - 255). */
+ {}
+
+TRgb &TRgb::operator=(const TRgb &col)
+ {
+ iRed=col.iRed;
+ iGreen=col.iGreen;
+ iBlue=col.iBlue;
+ return(*this);
+ }
+
+int TRgb::operator==(const TRgb &col)
+ {
+ return(iRed==col.iRed && iGreen==col.iGreen && iBlue==col.iBlue);
+ }
+
+int TRgb::Difference(const TRgb& col) const
+ {
+ return abs(iRed-col.iRed) + abs(iGreen-col.iGreen) + abs(iBlue-col.iBlue);
+ }
+
+int TRgb::Gray2() const
+/** Gets a 2 level grayscale value from this TRgb.
+
+@return Equivalent 2 level grayscale value. The greyscale value is 0 or 1,
+and is calculated using c=(2*r+5*g+b)/1024. Note that the return value is
+rounded down to the nearest integer. */
+ {
+ return Gray256() / 128;
+ }
+
+int TRgb::Gray4() const
+/** Gets a 4 level grayscale value from this TRgb.
+
+@return Equivalent 4 level grayscale value. The greyscale value is calculated
+using c=(2*r+5*g+b)/512. Note that the return value is rounded down to the
+nearest integer. */
+ {
+ return Gray256() / 64;
+ }
+
+int TRgb::Gray16() const
+/** Gets a 16 level grayscale value from this TRgb.
+
+@return The greyscale value is calculated using c=(2*r+5*g+b)/128. Note that
+the return value is rounded down to the nearest integer. */
+ {
+ return Gray256() / 16;
+ }
+
+int TRgb::Gray256() const
+/** Gets a 256 level grayscale value from this TRgb.
+
+@return The greyscale value is calculated using c=(2*r+5*g+b)/8. Note that
+the return value is rounded down to the nearest integer. */
+ {
+ return((2*iRed+5*iGreen+iBlue)/8);
+ }
+
+int TRgb::Color16() const
+/** Gets a 4 bit index into a colour palette from this TRgb.
+
+@return The EGA low colour constant closest to the TRgb. */
+ {
+ int index = (iRed >> 5) & 0x007;
+ index |= (iGreen >> 2) & 0x038;
+ index |= (iBlue << 1) & 0x1c0;
+ return color16inverse[index];
+ }
+
+int TRgb::Color256() const
+/** Gets an 8 bit index into a colour palette from this TRgb.
+
+@return An 8 bit index. */
+ {
+ int index = (iRed >> 4) & 0x00f;
+ index |= iGreen & 0x0f0;
+ index |= (iBlue << 4) & 0xf00;
+
+ if (color256InversePalette)
+ return color256InversePalette[index];
+ else
+ return color256inverse[index];
+ }
+
+int TRgb::Color4K() const
+/** Gets a 12 bit index into a colour palette from this TRgb.
+
+@return A 12 bit index. */
+ {
+ return(((iRed&0xf0)<<4)|(iGreen&0xf0)|((iBlue&0xf0)>>4));
+ }
+
+int TRgb::Color64K() const
+/** Gets a 24 bit index into a colour palette from this TRgb.
+
+@return A 24 bit index. */
+ {
+ return(((iRed&0xf8)<<8)|((iGreen&0xfc)<<3)|((iBlue&0xf8)>>3));
+ }
+
+long int TRgb::Color16M() const
+/** Gets a 16 bit index into a colour palette from this TRgb.
+
+@return A 16 bit index. */
+ {
+ return((iRed<<16)|(iGreen<<8)|iBlue);
+ }
+
+TRgb TRgb::Gray2(int aGray2)
+/** Gets TRgb from 2 level grayscale.
+
+The function takes a grayscale argument and return a TRgb whose red, green
+and blue values are set to an appropriate level.
+
+@param aGray2 Grayscale value to be converted.
+@return Equivalent 24 bit colour. Gray2 has only 2 levels (black and white), -
+the function returns r=g=b=0 or r=g=b=255. */
+ {
+ aGray2 *= 255;
+ return TRgb(aGray2,aGray2,aGray2);
+ }
+
+TRgb TRgb::Gray4(int aGray4)
+/** Gets TRgb from 4 level grayscale.
+
+The function takes a grayscale argument and return a TRgb whose red, green
+and blue values are set to an appropriate level.
+
+@param aGray4 Grayscale value to be converted.
+@return Equivalent 24 bit colour. Gray4 has 4 levels- the function returns
+r=g=b=85*c, where c=0,1,2, or 3. */
+ {
+ aGray4 *= 85;
+ return TRgb(aGray4,aGray4,aGray4);
+ }
+
+TRgb TRgb::Gray16(int aGray16)
+/** Gets TRgb from 16 level grayscale.
+
+The function takes a grayscale argument and return a TRgb whose red, green
+and blue values are set to an appropriate level.
+
+@param aGray16 Grayscale value to be converted.
+@return Equivalent 24 bit colour. Gray16 has 16 levels- the function returns
+r=g=b=17*c, where c=0, 1, ... 15. */
+ {
+ aGray16 *= 17;
+ return TRgb(aGray16,aGray16,aGray16);
+ }
+
+TRgb TRgb::Gray256(int aGray256)
+/** Gets TRgb from 256 level grayscale.
+
+The function takes a grayscale argument and return a TRgb whose red, green
+and blue values are set to an appropriate level.
+
+@param aGray256 Grayscale value to be converted.
+@return Equivalent 24 bit colour. Gray256 has 256 levels- the function
+returns r=g=b=c, where c=0, 1, ... 255. */
+ {
+ return TRgb(aGray256,aGray256,aGray256);
+ }
+
+TRgb TRgb::Color16(int aColor16)
+/** Gets TRgb from 4 bit colour index.
+
+The function takes a 4 bit index into a colour palette and returns a TRgb
+whose red, green and blue values are set to an appropriate level.
+
+@param aColor16 4 bit index into a colour palette
+@return Equivalent 24 bit colour. */
+ {
+ return TRgb(color16array[aColor16&0xf]);
+ }
+
+TRgb TRgb::Color256(int aColor256)
+/** Gets TRgb from 8 bit colour index.
+
+The function takes an 8 bit index into a colour palette and returns a TRgb
+whose red, green and blue values are set to an appropriate level.
+
+@param aColor256 8 bit index into a colour palette.
+@return Equivalent 24 bit colour. */
+ {
+ if (color256Palette)
+ return color256Palette[aColor256&0xff];
+ else
+ return TRgb(color256array[aColor256&0xff]);
+ }
+
+TRgb TRgb::Color4K(int aColor4K)
+ {
+ return TRgb(((aColor4K>>8)&0xf)*17,((aColor4K>>4)&0xf)*17,(aColor4K&0xf)*17);
+ }
+
+TRgb TRgb::Color64K(int aColor64K)
+/** Gets TRgb from 64K colour index.
+
+The function takes a 16 bit index into a colour palette and returns a TRgb
+whose red, green and blue values are set to an appropriate level.
+
+@param aColor64K 16 bit index into a colour palette
+@return Equivalent 24 bit colour. */
+ {
+ return TRgb(((aColor64K>>11)&0x1f)*255/31,((aColor64K>>5)&0x3f)*255/63,(aColor64K&0x1f)*255/31);
+ }
+
+TRgb TRgb::Color16M(long int aColor16M)
+/** Gets TRgb from 16M colour index.
+
+The function takes a 24 bit index into a colour palette and returns the TRgb
+whose red, green and blue values represent it exactly.
+
+@param aColor16M 24 bit index into a colour palette
+@return The TRgb which represents the index exactly. */
+ {
+ return TRgb(((aColor16M>>16)&0xff),(aColor16M>>8)&0xff,aColor16M&0xff);
+ }
+