613 lines
19 KiB
C++
613 lines
19 KiB
C++
//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1997.
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//
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// File: I C O M E R G E . C P P
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//
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// Contents: Utility functions for loading and merging icons
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//
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// Notes:
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//
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// Author: jeffspr 18 Nov 1998
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//
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//----------------------------------------------------------------------------
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#include "pch.h"
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#pragma hdrstop
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#include "ncdebug.h"
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#include "icomerge.h"
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#define WIDTHBYTES(bits) (((bits) + 31) / 32 * 4)
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UINT ReadICOHeader( HANDLE hFile )
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{
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WORD Input;
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DWORD dwBytesRead; // Read the 'reserved' WORD
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if( ! ReadFile( hFile, &Input, sizeof( WORD ), &dwBytesRead, NULL ) )
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return (UINT)-1; // Did we get a WORD?
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if( dwBytesRead != sizeof( WORD ) )
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return (UINT)-1; // Was it 'reserved' ? (ie 0)
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if( Input != 0 )
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return (UINT)-1; // Read the type WORD
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if( ! ReadFile( hFile, &Input, sizeof( WORD ), &dwBytesRead, NULL ) )
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return (UINT)-1; // Did we get a WORD?
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if( dwBytesRead != sizeof( WORD ) )
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return (UINT)-1; // Was it type 1?
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if( Input != 1 )
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return (UINT)-1; // Get the count of images
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if( ! ReadFile( hFile, &Input, sizeof( WORD ), &dwBytesRead, NULL ) )
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return (UINT)-1; // Did we get a WORD?
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if( dwBytesRead != sizeof( WORD ) )
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return (UINT)-1; // Return the count
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return Input;
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}
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DWORD BytesPerLine( LPBITMAPINFOHEADER lpBMIH )
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{
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return WIDTHBYTES(lpBMIH->biWidth * lpBMIH->biPlanes * lpBMIH->biBitCount);
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}
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WORD DIBNumColors( PSTR lpbi )
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{
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WORD wBitCount;
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DWORD dwClrUsed;
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dwClrUsed = ((LPBITMAPINFOHEADER) lpbi)->biClrUsed;
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if (dwClrUsed)
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return (WORD) dwClrUsed;
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wBitCount = ((LPBITMAPINFOHEADER) lpbi)->biBitCount;
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switch (wBitCount)
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{
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case 1:
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return 2;
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case 4:
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return 16;
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case 8:
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return 256;
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default:
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return 0;
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}
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return 0;
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}
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WORD PaletteSize( PSTR lpbi )
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{
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return ( DIBNumColors( lpbi ) * sizeof( RGBQUAD ) );
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}
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PSTR FindDIBBits( PSTR lpbi )
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{
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return ( lpbi + *(LPDWORD)lpbi + PaletteSize( lpbi ) );
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}
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BOOL AdjustIconImagePointers( LPICONIMAGE lpImage )
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{ // Sanity check
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if( lpImage==NULL )
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return FALSE; // BITMAPINFO is at beginning of bits
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lpImage->lpbi = (LPBITMAPINFO)lpImage->lpBits; // Width - simple enough
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lpImage->Width = lpImage->lpbi->bmiHeader.biWidth; // Icons are stored in funky format where height is doubled - account for it
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lpImage->Height = (lpImage->lpbi->bmiHeader.biHeight)/2; // How many colors?
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lpImage->Colors = lpImage->lpbi->bmiHeader.biPlanes * lpImage->lpbi->bmiHeader.biBitCount; // XOR bits follow the header and color table
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lpImage->lpXOR = (unsigned char *)FindDIBBits((PSTR)lpImage->lpbi); // AND bits follow the XOR bits
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lpImage->lpAND = lpImage->lpXOR + (lpImage->Height*BytesPerLine((LPBITMAPINFOHEADER)(lpImage->lpbi)));
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return TRUE;
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}
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//+---------------------------------------------------------------------------
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//
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// Function: ReadIconFromICOFile
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//
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// Purpose: Load an icon into memory
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//
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// Arguments:
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// szFileName [in] ICO file to read
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//
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// Returns:
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//
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// Author: jeffspr 18 Nov 1998
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//
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// Notes:
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//
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LPICONRESOURCE ReadIconFromICOFile( PCWSTR szFileName )
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{
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LPICONRESOURCE lpIR = NULL, lpNew = NULL;
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HANDLE hFile = NULL;
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UINT i;
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DWORD dwBytesRead;
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LPICONDIRENTRY lpIDE = NULL;
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// Open the file
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if( (hFile = CreateFile( szFileName, GENERIC_READ, 0, NULL,
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OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL )) == INVALID_HANDLE_VALUE )
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{
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MessageBox( NULL, L"Error Opening File for Reading", szFileName, MB_OK );
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return NULL;
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}
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// Allocate memory for the resource structure
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if( (lpIR = (LPICONRESOURCE) malloc( sizeof(ICONRESOURCE) )) == NULL )
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{
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MessageBox( NULL, L"Error Allocating Memory", szFileName, MB_OK );
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CloseHandle( hFile );
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return NULL;
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}
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// Read in the header
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if( (lpIR->nNumImages = ReadICOHeader( hFile )) == (UINT)-1 )
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{
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MessageBox( NULL, L"Error Reading File Header", szFileName, MB_OK );
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CloseHandle( hFile );
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free( lpIR );
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return NULL;
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}
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// Adjust the size of the struct to account for the images
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if( (lpNew = (LPICONRESOURCE) realloc( lpIR, sizeof(ICONRESOURCE) +
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((lpIR->nNumImages-1) * sizeof(ICONIMAGE)) )) == NULL )
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{
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MessageBox( NULL, L"Error Allocating Memory", szFileName, MB_OK );
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CloseHandle( hFile );
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free( lpIR );
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return NULL;
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}
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lpIR = lpNew;
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// Store the original name
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lstrcpyW( lpIR->szOriginalICOFileName, szFileName );
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lstrcpyW( lpIR->szOriginalDLLFileName, L"" );
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// Allocate enough memory for the icon directory entries
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if( (lpIDE = (LPICONDIRENTRY) malloc( lpIR->nNumImages * sizeof( ICONDIRENTRY ) ) ) == NULL )
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{
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MessageBox( NULL, L"Error Allocating Memory", szFileName, MB_OK );
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CloseHandle( hFile );
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free( lpIR );
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return NULL;
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}
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// Read in the icon directory entries
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if( ! ReadFile( hFile, lpIDE, lpIR->nNumImages * sizeof( ICONDIRENTRY ), &dwBytesRead, NULL ) )
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{
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MessageBox( NULL, L"Error Reading File", szFileName, MB_OK );
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CloseHandle( hFile );
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free( lpIR );
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return NULL;
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}
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if( dwBytesRead != lpIR->nNumImages * sizeof( ICONDIRENTRY ) )
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{
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MessageBox( NULL, L"Error Reading File", szFileName, MB_OK );
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CloseHandle( hFile );
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free( lpIR );
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return NULL;
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}
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// Loop through and read in each image
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for( i = 0; i < lpIR->nNumImages; i++ )
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{
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// Allocate memory for the resource
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if( (lpIR->IconImages[i].lpBits = (LPBYTE) malloc(lpIDE[i].dwBytesInRes)) == NULL )
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{
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MessageBox( NULL, L"Error Allocating Memory", szFileName, MB_OK );
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CloseHandle( hFile );
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free( lpIR );
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free( lpIDE );
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return NULL;
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}
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lpIR->IconImages[i].dwNumBytes = lpIDE[i].dwBytesInRes;
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// Seek to beginning of this image
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if( SetFilePointer( hFile, lpIDE[i].dwImageOffset, NULL, FILE_BEGIN ) == 0xFFFFFFFF )
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{
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MessageBox( NULL, L"Error Seeking in File", szFileName, MB_OK );
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CloseHandle( hFile );
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free( lpIR );
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free( lpIDE );
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return NULL;
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}
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// Read it in
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if( ! ReadFile( hFile, lpIR->IconImages[i].lpBits, lpIDE[i].dwBytesInRes, &dwBytesRead, NULL ) )
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{
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MessageBox( NULL, L"Error Reading File", szFileName, MB_OK );
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CloseHandle( hFile );
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free( lpIR );
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free( lpIDE );
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return NULL;
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}
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if( dwBytesRead != lpIDE[i].dwBytesInRes )
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{
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MessageBox( NULL, L"Error Reading File", szFileName, MB_OK );
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CloseHandle( hFile );
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free( lpIDE );
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free( lpIR );
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return NULL;
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}
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// Set the internal pointers appropriately
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if( ! AdjustIconImagePointers( &(lpIR->IconImages[i]) ) )
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{
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MessageBox( NULL, L"Error Converting to INternal format", szFileName, MB_OK );
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CloseHandle( hFile );
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free( lpIDE );
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free( lpIR );
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return NULL;
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}
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}
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// Clean up
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free( lpIDE );
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CloseHandle( hFile );
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return lpIR;
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}
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UINT GetBits(UINT uiNumber, INT iStart, INT iBits)
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{
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return (uiNumber >> (iStart+1-iBits)) & ~(~0 << iBits);
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}
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VOID DebugPrintIconMasks(LPICONRESOURCE pIR)
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{
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UINT uiColorLoop = 0;
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UINT uiColors = pIR->IconImages[0].Colors;
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UINT uiBitCount = pIR->IconImages[0].lpbi->bmiHeader.biBitCount;
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printf("Num images: %d\n", pIR->nNumImages);
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printf("Name: %S\n", pIR->szOriginalICOFileName);
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#if 0
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UINT Width, Height, Colors; // Width, Height and bpp
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LPBYTE lpBits; // ptr to DIB bits
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DWORD dwNumBytes; // how many bytes?
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LPBITMAPINFO lpbi; // ptr to header
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LPBYTE lpXOR; // ptr to XOR image bits
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LPBYTE lpAND; // ptr to AND image bits
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#endif
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printf("Width: %d, Height: %d\n", pIR->IconImages[0].Width, pIR->IconImages[0].Height);
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printf("Color Depth: %d\n", uiBitCount);
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printf("Colors: %d, Bytes: %d\n", uiColors, pIR->IconImages[0].dwNumBytes);
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for (uiColorLoop = 0; uiColorLoop < uiColors; uiColorLoop++)
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{
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printf("Color %d, R: %d G: %d B: %d\n",
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uiColorLoop,
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pIR->IconImages[0].lpbi->bmiColors[uiColorLoop].rgbRed,
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pIR->IconImages[0].lpbi->bmiColors[uiColorLoop].rgbGreen,
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pIR->IconImages[0].lpbi->bmiColors[uiColorLoop].rgbBlue);
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}
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UINT uiNewLine = 0;
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UINT uiNewByte = 0;
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UINT uiByteLoop = 0;
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UINT uiPixel = 0;
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printf("XOR map:\n");
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while(uiPixel < (pIR->IconImages[0].Width * pIR->IconImages[0].Height))
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{
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BYTE bCurrentByte = pIR->IconImages[0].lpXOR[uiByteLoop];
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if (uiBitCount == 4)
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{
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BYTE bXOR = (bCurrentByte & 0xF0);
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if (bXOR > 0)
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printf("*");
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else
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printf(" ");
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if (++uiNewLine >= pIR->IconImages[0].Width)
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{
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uiNewLine = 0;
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printf("\n");
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}
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bXOR = (bCurrentByte & 0x0F);
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if (bXOR > 0)
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printf("*");
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else
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printf(" ");
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if (++uiNewLine >= pIR->IconImages[0].Width)
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{
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uiNewLine = 0;
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printf("\n");
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}
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uiByteLoop++;
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uiPixel += 2;
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}
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else
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{
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Assert(uiBitCount == 8);
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BYTE bXOR = pIR->IconImages[0].lpXOR[uiPixel];
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if (bXOR > 0)
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printf("*");
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else
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printf(" ");
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if (++uiNewLine >= pIR->IconImages[0].Width)
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{
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uiNewLine = 0;
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printf("\n");
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}
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uiPixel++;
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}
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}
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uiNewLine = 0;
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UINT uiANDBytes = (pIR->IconImages[0].Width * pIR->IconImages[0].Height) / 8;
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printf("AND map:\n");
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for (uiPixel = 0; uiPixel < uiANDBytes; uiPixel++)
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{
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UINT uiCurrentByte = pIR->IconImages[0].lpAND[uiPixel];
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UINT uiCurrentBit = 0;
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for (uiCurrentBit = 0; uiCurrentBit < 8; uiCurrentBit++)
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{
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if (GetBits(uiCurrentByte, 7-uiCurrentBit, 1))
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{
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printf("*");
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}
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else
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{
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printf(" ");
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}
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if (++uiNewLine >= pIR->IconImages[0].Width)
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{
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uiNewLine = 0;
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printf("\n");
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}
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}
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}
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}
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VOID OverlayIcons(LPICONRESOURCE pIRBase, LPICONRESOURCE pIROverlay)
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{
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UINT uiANDLoop = 0;
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UINT uiXORByte = 0;
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UINT uiANDBytes = (pIROverlay->IconImages[0].Width * pIROverlay->IconImages[0].Height) / 8;
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UINT uiNewLine = 0;
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UINT uiBitCountBase = pIRBase->IconImages[0].lpbi->bmiHeader.biBitCount;
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UINT uiBitCountOverlay = pIROverlay->IconImages[0].lpbi->bmiHeader.biBitCount;
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if (uiBitCountBase != uiBitCountOverlay)
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{
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AssertSz(uiBitCountBase == uiBitCountOverlay, "Non-compatible bitcounts");
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printf("*** ERROR *** Icon bitcounts different in OverlayIcons, base: %d, overlay: %d",
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uiBitCountBase, uiBitCountOverlay);
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goto Exit;
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}
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for (uiANDLoop = 0; uiANDLoop < uiANDBytes; uiANDLoop++)
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{
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BYTE uiCurrentByte = pIROverlay->IconImages[0].lpAND[uiANDLoop];
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UINT uiCurrentBit = 0;
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for (uiCurrentBit = 0; uiCurrentBit < 8; uiCurrentBit++)
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{
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if (!GetBits(uiCurrentByte, 7-uiCurrentBit, 1))
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{
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// printf("$");
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BYTE bNewANDBits = 1;
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BYTE bXORBaseMask = 0x00;
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BYTE bXOROverlayMask = 0x00;
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BYTE bNewXORBits = 0x00;
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bNewANDBits <<= (7-uiCurrentBit);
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bNewANDBits = ~bNewANDBits;
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pIRBase->IconImages[0].lpAND[uiANDLoop] &= bNewANDBits;
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switch(uiBitCountBase)
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{
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case 4:
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// If even number, use the first set of bits
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//
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if ((uiCurrentBit % 2) == 0)
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{
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bXORBaseMask = 0x0F;
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bXOROverlayMask = 0xF0;
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}
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else
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{
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bXORBaseMask = 0xF0;
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bXOROverlayMask = 0x0F;
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}
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break;
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case 8:
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bXORBaseMask = 0x00;
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bXOROverlayMask = 0xFF;
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break;
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default:
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AssertSz(FALSE, "Unsupported bitcount in OverlayIcons. What's up with that?");
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printf("*** ERROR *** Non-supported bitcount, bits: %d\n", uiBitCountBase);
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break;
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}
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bNewXORBits = (pIRBase->IconImages[0].lpXOR[uiXORByte] & bXORBaseMask) |
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(pIROverlay->IconImages[0].lpXOR[uiXORByte] & bXOROverlayMask);
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pIRBase->IconImages[0].lpXOR[uiXORByte] = bNewXORBits;
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}
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else
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{
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// printf(" ");
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}
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switch(uiBitCountBase)
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{
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case 4:
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if ((uiCurrentBit % 2))
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{
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uiXORByte++;
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}
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break;
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case 8:
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uiXORByte++;
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break;
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}
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if (++uiNewLine >= pIROverlay->IconImages[0].Width)
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{
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uiNewLine = 0;
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// printf("\n");
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}
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}
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}
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Exit:
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return;
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}
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BOOL WriteICOHeader( HANDLE hFile, UINT nNumEntries )
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{
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WORD Output;
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DWORD dwBytesWritten;
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// Write 'reserved' WORD
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Output = 0;
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if( ! WriteFile( hFile, &Output, sizeof( WORD ), &dwBytesWritten, NULL ) )
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return FALSE;
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// Did we write a WORD?
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if( dwBytesWritten != sizeof( WORD ) )
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return FALSE;
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// Write 'type' WORD (1)
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Output = 1;
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if( ! WriteFile( hFile, &Output, sizeof( WORD ), &dwBytesWritten, NULL ) )
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return FALSE;
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// Did we write a WORD?
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if( dwBytesWritten != sizeof( WORD ) )
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return FALSE;
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// Write Number of Entries
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Output = (WORD)nNumEntries;
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if( ! WriteFile( hFile, &Output, sizeof( WORD ), &dwBytesWritten, NULL ) )
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return FALSE;
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// Did we write a WORD?
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if( dwBytesWritten != sizeof( WORD ) )
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return FALSE;
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return TRUE;
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}
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/****************************************************************************
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*
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* FUNCTION: CalculateImageOffset
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*
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* PURPOSE: Calculates the file offset for an icon image
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*
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* PARAMS: LPICONRESOURCE lpIR - pointer to icon resource
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* UINT nIndex - which image?
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*
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* RETURNS: DWORD - the file offset for that image
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*
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* History:
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* July '95 - Created
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*
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\****************************************************************************/
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DWORD CalculateImageOffset( LPICONRESOURCE lpIR, UINT nIndex )
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{
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DWORD dwSize;
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UINT i;
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// Calculate the ICO header size
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dwSize = 3 * sizeof(WORD);
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// Add the ICONDIRENTRY's
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dwSize += lpIR->nNumImages * sizeof(ICONDIRENTRY);
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// Add the sizes of the previous images
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for(i=0;i<nIndex;i++)
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dwSize += lpIR->IconImages[i].dwNumBytes;
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// we're there - return the number
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return dwSize;
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}
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/****************************************************************************
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*
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* FUNCTION: WriteIconToICOFile
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*
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* PURPOSE: Writes the icon resource data to an ICO file
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*
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* PARAMS: LPICONRESOURCE lpIR - pointer to icon resource
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* PCWSTR szFileName - name for the ICO file
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*
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* RETURNS: BOOL - TRUE for success, FALSE for failure
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*
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* History:
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* July '95 - Created
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*
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\****************************************************************************/
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BOOL WriteIconToICOFile( LPICONRESOURCE lpIR, PCWSTR szFileName )
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{
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HANDLE hFile;
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UINT i;
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DWORD dwBytesWritten;
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// open the file
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if( (hFile = CreateFile( szFileName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL )) == INVALID_HANDLE_VALUE )
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{
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MessageBox( NULL, L"Error Opening File for Writing", szFileName, MB_OK );
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return FALSE;
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}
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// Write the header
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if( ! WriteICOHeader( hFile, lpIR->nNumImages ) )
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{
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MessageBox( NULL, L"Error Writing ICO File", szFileName, MB_OK );
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CloseHandle( hFile );
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return FALSE;
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}
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// Write the ICONDIRENTRY's
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for( i=0; i<lpIR->nNumImages; i++ )
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{
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ICONDIRENTRY ide;
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// Convert internal format to ICONDIRENTRY
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ide.bWidth = (BYTE)lpIR->IconImages[i].Width;
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ide.bHeight = (BYTE)lpIR->IconImages[i].Height;
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ide.bReserved = 0;
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ide.wPlanes = lpIR->IconImages[i].lpbi->bmiHeader.biPlanes;
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ide.wBitCount = lpIR->IconImages[i].lpbi->bmiHeader.biBitCount;
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if( (ide.wPlanes * ide.wBitCount) >= 8 )
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ide.bColorCount = 0;
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else
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ide.bColorCount = 1 << (ide.wPlanes * ide.wBitCount);
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ide.dwBytesInRes = lpIR->IconImages[i].dwNumBytes;
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ide.dwImageOffset = CalculateImageOffset( lpIR, i );
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// Write the ICONDIRENTRY out to disk
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if( ! WriteFile( hFile, &ide, sizeof( ICONDIRENTRY ), &dwBytesWritten, NULL ) )
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return FALSE;
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// Did we write a full ICONDIRENTRY ?
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if( dwBytesWritten != sizeof( ICONDIRENTRY ) )
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return FALSE;
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}
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// Write the image bits for each image
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for( i=0; i<lpIR->nNumImages; i++ )
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{
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DWORD dwTemp = lpIR->IconImages[i].lpbi->bmiHeader.biSizeImage;
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// Set the sizeimage member to zero
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lpIR->IconImages[i].lpbi->bmiHeader.biSizeImage = 0;
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// Write the image bits to file
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if( ! WriteFile( hFile, lpIR->IconImages[i].lpBits, lpIR->IconImages[i].dwNumBytes, &dwBytesWritten, NULL ) )
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return FALSE;
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if( dwBytesWritten != lpIR->IconImages[i].dwNumBytes )
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return FALSE;
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// set it back
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lpIR->IconImages[i].lpbi->bmiHeader.biSizeImage = dwTemp;
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}
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CloseHandle( hFile );
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return FALSE;
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}
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