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Tuesday the 22nd of May 2012 @ 02:05am

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LibN2L N2L Home Older News Downloads Documentation (n2l5) Class Hierarchy Compound List File List n2l:: Members Functions Whole n2l:: Ref Documentation (libN2L-4) Class Hierarchy Compound List File List n2l:: Members Functions Whole n2l:: Ref Bugtracker Project Page Report a Bug Bug List Related Things Life 2130 Devel Game Journal

LibN2L-4 Library Code Reference Classes Compounds Files Members Method Index Full Reference cPixelFormat.cpp Go to the documentation of this file. /************************************************************************ Nova-2 Library (libN2L, or simply n2l) Game development C++ Library Copyright (C) 2003 Aaron Cameron This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA A copy of the GNU Lesser General Public License has been provided with this library in the file 'COPYING'. Contact information for the author of this library has been provided with this library in the file 'AUTHOR'. ************************************************************************/ #include "cPixelFormat.h" namespace n2l { const cPixelFormat::tBitCount cPixelFormat::nBitCount = cPixelFormat::tBitCount(-1); /* ************************************************************ */ cPixelFormat::cPixelFormat() { clear(); } /* ************************************************************ */ cPixelFormat::cPixelFormat( const cPixelFormat & iFormat ) { assign(iFormat); } /* ************************************************************ */ cPixelFormat::cPixelFormat( const SDL_PixelFormat & iFormat ) : mBitsPerPixel( iFormat.BitsPerPixel ), mBytesPerPixel( iFormat.BytesPerPixel ) { mCMask[Channel_Red] = iFormat.Rmask; mCMask[Channel_Green] = iFormat.Gmask; mCMask[Channel_Blue] = iFormat.Bmask; mCMask[Channel_Alpha] = iFormat.Amask; mCLoss[Channel_Red] = iFormat.Rloss; mCLoss[Channel_Green] = iFormat.Gloss; mCLoss[Channel_Blue] = iFormat.Bloss; mCLoss[Channel_Alpha] = iFormat.Aloss; mCShift[Channel_Red] = iFormat.Rshift; mCShift[Channel_Green]= iFormat.Gshift; mCShift[Channel_Blue] = iFormat.Bshift; mCShift[Channel_Alpha]= iFormat.Ashift; calculateChannelBitSizes(); } /* ************************************************************ */ const cPixelFormat::tBitCount cPixelFormat::bitsPerPixel() const { return mBitsPerPixel; } /* ************************************************************ */ const cPixelFormat::tByteCount cPixelFormat::bytesPerPixel() const { return mBytesPerPixel; } /* ************************************************************ */ const cPixelFormat::tChannelMask cPixelFormat::channelMask( const tChannel iChannel ) const { if (iChannel>=Channel_NChannel || iChannel<0) throw cOutOfBoundsException("cPixelFormat::channelMask", "Channel out of bounds"); return mCMask[iChannel]; } /* ************************************************************ */ const cPixelFormat::tBitCount cPixelFormat::channelLoss( const tChannel iChannel ) const { if (iChannel>=Channel_NChannel || iChannel<0) throw cOutOfBoundsException("cPixelFormat::channelLoss", "Channel out of bounds"); return mCLoss[iChannel]; } /* ************************************************************ */ const cPixelFormat::tBitCount cPixelFormat::channelShift( const tChannel iChannel ) const { if (iChannel>=Channel_NChannel || iChannel<0) throw cOutOfBoundsException("cPixelFormat::channelShift", "Channel out of bounds"); return mCShift[iChannel]; } /* ************************************************************ */ const cPixelFormat::tBitCount cPixelFormat::bitsForChannel( const tChannel iChannel ) const { if (iChannel>=Channel_NChannel || iChannel<0) throw cOutOfBoundsException("cPixelFormat::bitsForChannel", "Channel out of bounds"); return mBitsPerChannel[iChannel]; } /* ************************************************************ */ void cPixelFormat::channelMasks( tChannelMask & oRed, tChannelMask & oGreen, tChannelMask & oBlue, tChannelMask & oAlpha ) const { oRed = mCMask[Channel_Red]; oGreen = mCMask[Channel_Green]; oBlue = mCMask[Channel_Blue]; oAlpha = mCMask[Channel_Alpha]; } /* ************************************************************ */ void cPixelFormat::channelLosses( tBitCount & oRed, tBitCount & oGreen, tBitCount & oBlue, tBitCount & oAlpha ) const { oRed = mCLoss[Channel_Red]; oGreen = mCLoss[Channel_Green]; oBlue = mCLoss[Channel_Blue]; oAlpha = mCLoss[Channel_Alpha]; } /* ************************************************************ */ void cPixelFormat::channelShifts( tBitCount & oRed, tBitCount & oGreen, tBitCount & oBlue, tBitCount & oAlpha ) const { oRed = mCShift[Channel_Red]; oGreen = mCShift[Channel_Green]; oBlue = mCShift[Channel_Blue]; oAlpha = mCShift[Channel_Alpha]; } /* ************************************************************ */ void cPixelFormat::assign( const cPixelFormat & iFormat ) { mBitsPerPixel = iFormat.mBitsPerPixel; mBytesPerPixel = iFormat.mBytesPerPixel; for (tUbyte c=Channel_Red; c<Channel_NChannel; ++c) { mCMask[c] = iFormat.mCMask[c]; mCShift[c] = iFormat.mCShift[c]; mCLoss[c] = iFormat.mCLoss[c]; mBitsPerChannel[c] = iFormat.mBitsPerChannel[c]; } } /* ************************************************************ */ void cPixelFormat::clear() { // Define a zero format mBitsPerPixel = 0; mBytesPerPixel = 0; for (tUbyte c=Channel_Red; c<Channel_NChannel; ++c) { mCMask[c] = 0x00; mCShift[c] = 0x00; mCLoss[c] = 0x00; mBitsPerChannel[c] = 0; } } /* ************************************************************ */ void cPixelFormat::calculateChannelBitSizes() { for (tUbyte c=Channel_Red; c<Channel_NChannel; ++c) { // Set all bits tChannelMask v = tChannelMask(-1); v &= mCMask[c]; v = (v >> mCShift[c]); tChannelMask bit = 0x01; mBitsPerChannel[c] = 0; while (v>bit) { bit = bit << 1; ++mBitsPerChannel[c]; } } } /* ************************************************************ */ const tBool cPixelFormat::operator ==( const cPixelFormat & iFormat ) const { if (mBitsPerPixel != iFormat.mBitsPerPixel || mBytesPerPixel != iFormat.mBytesPerPixel) return false; for (tUbyte c=Channel_Red; c<Channel_NChannel; ++c) if (mCMask[c]!=iFormat.mCMask[c] || mCShift[c]!=iFormat.mCShift[c] || mCLoss[c]!=iFormat.mCLoss[c] || mBitsPerChannel[c]!=iFormat.mBitsPerChannel[c]) return false; return true; } /* ************************************************************ */ const tString cPixelFormat::asString() const { tString temp( "cPixelFormat(\n"); temp += "\tBits/Pixel:\t" + n2l::asString(mBitsPerPixel) + "\n"; temp += "\tBytes/Pixel:\t" + n2l::asString(mBytesPerPixel) + "\n"; temp += "\t \t\tMask\t\t\tShift\tLoss\tBpC\n"; for (tUbyte c=Channel_Red; c<Channel_NChannel; ++c) { switch (c) { case Channel_Red: temp += "\tR: "; break; case Channel_Green: temp += "\tG: "; break; case Channel_Blue: temp += "\tB: "; break; case Channel_Alpha: temp += "\tA: "; break; default: break; } temp += n2l::asBinaryMaskString( mCMask[c] ) + "\t"; temp += n2l::asString(mCShift[c]) + "\t"; temp += n2l::asString(mCLoss[c]) + "\t"; temp += n2l::asString(mBitsPerChannel[c]) + "\n"; } temp += ")"; return temp; } } // namespace

©2012 Aaron Cameron