?? dibapi.cpp
字號:
// Select DIBSections into DCs
hOldSourceBitmap = (HBITMAP)SelectObject( hSourceDC, hSourceBitmap );
hOldTargetBitmap = (HBITMAP)SelectObject( hTargetDC, hTargetBitmap );
// Set the color tables for the DIBSections
if( lpSrcDIB->bmiHeader.biBitCount <= 8 )
SetDIBColorTable( hSourceDC, 0, 1 << lpSrcDIB->bmiHeader.biBitCount, lpSrcDIB->bmiColors );
if( lpbmi->bmiHeader.biBitCount <= 8 )
SetDIBColorTable( hTargetDC, 0, 1 << lpbmi->bmiHeader.biBitCount, lpbmi->bmiColors );
// If we are asking for a straight copy, do it
if( (lpSrcDIB->bmiHeader.biWidth==lpbmi->bmiHeader.biWidth) && (lpSrcDIB->bmiHeader.biHeight==lpbmi->bmiHeader.biHeight) )
{
BitBlt( hTargetDC, 0, 0, lpbmi->bmiHeader.biWidth, lpbmi->bmiHeader.biHeight, hSourceDC, 0, 0, SRCCOPY );
}
else
{
// else, should we stretch it?
if( bStretch )
{
SetStretchBltMode( hTargetDC, COLORONCOLOR );
StretchBlt( hTargetDC, 0, 0, lpbmi->bmiHeader.biWidth, lpbmi->bmiHeader.biHeight, hSourceDC, 0, 0, lpSrcDIB->bmiHeader.biWidth, lpSrcDIB->bmiHeader.biHeight, SRCCOPY );
}
else
{
// or just take the upper left corner of the source
BitBlt( hTargetDC, 0, 0, lpbmi->bmiHeader.biWidth, lpbmi->bmiHeader.biHeight, hSourceDC, 0, 0, SRCCOPY );
}
}
// Clean up and delete the DCs
SelectObject( hSourceDC, hOldSourceBitmap );
SelectObject( hTargetDC, hOldTargetBitmap );
DeleteDC( hSourceDC );
DeleteDC( hTargetDC );
ReleaseDC( NULL, hDC );
// Flush the GDI batch, so we can play with the bits
GdiFlush();
// Allocate enough memory for the new CF_DIB, and copy bits
hDib = GlobalAlloc(GHND, dwTargetHeaderSize + dwTargetBitsSize );
lpResult = (LPBYTE)GlobalLock(hDib);
memcpy( lpResult, lpbmi, dwTargetHeaderSize );
memcpy( FindDIBBits( (LPBYTE)lpResult ), lpTargetBits, dwTargetBitsSize );
// final cleanup
DeleteObject( hTargetBitmap );
DeleteObject( hSourceBitmap );
free( lpbmi );
GlobalUnlock(hDib);
return hDib;
}
/* End ConvertDIBFormat() 1***************************************************/
/****************************************************************************
*
* FUNCTION: ConvertDIBFormat
*
* PURPOSE: Creates a new DIB of the requested format, copies the source
* image to the new DIB.
*
* PARAMS: HDIB hDIB - the source CF_DIB
* UINT nWidth - width for new DIB
* UINT nHeight - height for new DIB
* UINT nbpp - bpp for new DIB
* BOOL bStretch - TRUE to stretch source to dest
* FALSE to take upper left of image
* HPALETTE hPalSrc - Palette used to set new DIB
*
* RETURNS: HDIB - new CF_DIB handle
*
\****************************************************************************/
HDIB ConvertDIBFormat(HDIB hDIB, UINT nWidth, UINT nHeight, UINT nbpp, BOOL bStretch, HPALETTE hPalSrc)
{
LPBITMAPINFO lpbmi = NULL;
LPBYTE lpSourceBits, lpTargetBits, lpResult;
HDC hDC = NULL, hSourceDC, hTargetDC;
HBITMAP hSourceBitmap, hTargetBitmap, hOldTargetBitmap, hOldSourceBitmap;
DWORD dwSourceBitsSize, dwTargetBitsSize, dwTargetHeaderSize, dwColorNum;
HDIB hNewDIB;
DWORD dwSize;
// Get DIB pointer
if (! hDIB)
return NULL;
LPBITMAPINFO lpSrcDIB = (LPBITMAPINFO)GlobalLock(hDIB);
if (! lpSrcDIB)
return NULL;
// Allocate and fill out a BITMAPINFO struct for the new DIB
if (nbpp <= 8)
dwColorNum = 1 << nbpp;
else
dwColorNum = 0;
dwTargetHeaderSize = sizeof( BITMAPINFO ) + ( dwColorNum * sizeof( RGBQUAD ) );
lpbmi = (LPBITMAPINFO)malloc( dwTargetHeaderSize );
lpbmi->bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
lpbmi->bmiHeader.biWidth = nWidth;
lpbmi->bmiHeader.biHeight = nHeight;
lpbmi->bmiHeader.biPlanes = 1;
lpbmi->bmiHeader.biBitCount = nbpp;
lpbmi->bmiHeader.biCompression = BI_RGB;
lpbmi->bmiHeader.biSizeImage = 0;
lpbmi->bmiHeader.biXPelsPerMeter = 0;
lpbmi->bmiHeader.biYPelsPerMeter = 0;
lpbmi->bmiHeader.biClrUsed = 0;
lpbmi->bmiHeader.biClrImportant = 0;
// Fill in the color table
if( ! CopyColorTable( lpbmi, (LPBITMAPINFO)lpSrcDIB, hPalSrc ) )
{
free( lpbmi );
return NULL;
}
// Gonna use DIBSections and BitBlt() to do the conversion, so make 'em
hDC = GetDC( NULL );
hTargetBitmap = CreateDIBSection( hDC, lpbmi, DIB_RGB_COLORS, (VOID **)&lpTargetBits, NULL, 0 );
hSourceBitmap = CreateDIBSection( hDC, lpSrcDIB, DIB_RGB_COLORS, (VOID **)&lpSourceBits, NULL, 0 );
hSourceDC = CreateCompatibleDC( hDC );
hTargetDC = CreateCompatibleDC( hDC );
// Flip the bits on the source DIBSection to match the source DIB
dwSourceBitsSize = lpSrcDIB->bmiHeader.biHeight * BytesPerLine((LPBYTE)&(lpSrcDIB->bmiHeader));
dwTargetBitsSize = lpbmi->bmiHeader.biHeight * BytesPerLine((LPBYTE)&(lpbmi->bmiHeader));
memcpy( lpSourceBits, FindDIBBits((LPBYTE)lpSrcDIB), dwSourceBitsSize );
lpbmi->bmiHeader.biSizeImage = dwTargetBitsSize;
// Select DIBSections into DCs
hOldSourceBitmap = (HBITMAP)SelectObject( hSourceDC, hSourceBitmap );
hOldTargetBitmap = (HBITMAP)SelectObject( hTargetDC, hTargetBitmap );
// Set the color tables for the DIBSections
if( lpSrcDIB->bmiHeader.biBitCount <= 8 )
SetDIBColorTable( hSourceDC, 0, 1 << lpSrcDIB->bmiHeader.biBitCount, lpSrcDIB->bmiColors );
if( lpbmi->bmiHeader.biBitCount <= 8 )
SetDIBColorTable( hTargetDC, 0, 1 << lpbmi->bmiHeader.biBitCount, lpbmi->bmiColors );
// If we are asking for a straight copy, do it
if( (lpSrcDIB->bmiHeader.biWidth==lpbmi->bmiHeader.biWidth) && (lpSrcDIB->bmiHeader.biHeight==lpbmi->bmiHeader.biHeight) )
{
BitBlt( hTargetDC, 0, 0, lpbmi->bmiHeader.biWidth, lpbmi->bmiHeader.biHeight, hSourceDC, 0, 0, SRCCOPY );
}
else
{
// else, should we stretch it?
if( bStretch )
{
SetStretchBltMode( hTargetDC, COLORONCOLOR );
StretchBlt( hTargetDC, 0, 0, lpbmi->bmiHeader.biWidth, lpbmi->bmiHeader.biHeight, hSourceDC, 0, 0, lpSrcDIB->bmiHeader.biWidth, lpSrcDIB->bmiHeader.biHeight, SRCCOPY );
}
else
{
// or just take the upper left corner of the source
BitBlt( hTargetDC, 0, 0, lpbmi->bmiHeader.biWidth, lpbmi->bmiHeader.biHeight, hSourceDC, 0, 0, SRCCOPY );
}
}
// Clean up and delete the DCs
SelectObject( hSourceDC, hOldSourceBitmap );
SelectObject( hTargetDC, hOldTargetBitmap );
DeleteDC( hSourceDC );
DeleteDC( hTargetDC );
ReleaseDC( NULL, hDC );
// Flush the GDI batch, so we can play with the bits
GdiFlush();
// Allocate enough memory for the new CF_DIB, and copy bits
dwSize = dwTargetHeaderSize + dwTargetBitsSize;
hNewDIB = GlobalAlloc(GHND, dwSize);
lpResult = (LPBYTE)GlobalLock(hNewDIB);//malloc( dwTargetHeaderSize + dwTargetBitsSize );
memcpy( lpResult, lpbmi, dwTargetHeaderSize );
memcpy( FindDIBBits( (LPBYTE)lpResult ), lpTargetBits, dwTargetBitsSize );
// final cleanup
DeleteObject( hTargetBitmap );
DeleteObject( hSourceBitmap );
free( lpbmi );
GlobalUnlock(hDIB);
GlobalUnlock(hNewDIB);
return hNewDIB;
}
/* End ConvertDIBFormat() 2***************************************************/
/****************************************************************************
*
* FUNCTION: ConvertDIBFormat
*
* PURPOSE: Creates a new DIB of the requested format, copies the source
* image to the new DIB.
*
* PARAMS: LPBYTE lpDIB - the source CF_DIB
* UINT nbpp - bpp for new DIB
* HPALETTE hPalSrc - Palette used to set new DIB
*
* RETURNS: HDIB - new CF_DIB handle
*
\****************************************************************************/
HDIB ConvertDIBFormat(LPBYTE lpDIB, UINT nbpp, HPALETTE hPalSrc)
{
LPBITMAPINFO lpSrcDIB = (LPBITMAPINFO)lpDIB;
LPBITMAPINFO lpbmi = NULL;
LPBYTE lpSourceBits, lpTargetBits, lpResult;
HDC hDC = NULL, hSourceDC, hTargetDC;
HBITMAP hSourceBitmap, hTargetBitmap, hOldTargetBitmap, hOldSourceBitmap;
DWORD dwSourceBitsSize, dwTargetBitsSize, dwTargetHeaderSize, dwColorNum;
HDIB hNewDIB;
DWORD dwSize;
int nWidth, nHeight;
nWidth = lpSrcDIB->bmiHeader.biWidth;
nHeight = lpSrcDIB->bmiHeader.biHeight;
// Allocate and fill out a BITMAPINFO struct for the new DIB
if (nbpp <= 8)
dwColorNum = 1 << nbpp;
else
dwColorNum = 0;
dwTargetHeaderSize = sizeof( BITMAPINFO ) + ( dwColorNum * sizeof( RGBQUAD ) );
lpbmi = (LPBITMAPINFO)malloc( dwTargetHeaderSize );
lpbmi->bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
lpbmi->bmiHeader.biWidth = nWidth;
lpbmi->bmiHeader.biHeight = nHeight;
lpbmi->bmiHeader.biPlanes = 1;
lpbmi->bmiHeader.biBitCount = nbpp;
lpbmi->bmiHeader.biCompression = BI_RGB;
lpbmi->bmiHeader.biSizeImage = 0;
lpbmi->bmiHeader.biXPelsPerMeter = 0;
lpbmi->bmiHeader.biYPelsPerMeter = 0;
lpbmi->bmiHeader.biClrUsed = 0;
lpbmi->bmiHeader.biClrImportant = 0;
// Fill in the color table
if( ! CopyColorTable( lpbmi, (LPBITMAPINFO)lpSrcDIB, hPalSrc ) )
{
free( lpbmi );
return NULL;
}
// Gonna use DIBSections and BitBlt() to do the conversion, so make 'em
hDC = GetDC( NULL );
hTargetBitmap = CreateDIBSection( hDC, lpbmi, DIB_RGB_COLORS, (VOID **)&lpTargetBits, NULL, 0 );
hSourceBitmap = CreateDIBSection( hDC, lpSrcDIB, DIB_RGB_COLORS, (VOID **)&lpSourceBits, NULL, 0 );
hSourceDC = CreateCompatibleDC( hDC );
hTargetDC = CreateCompatibleDC( hDC );
// Flip the bits on the source DIBSection to match the source DIB
dwSourceBitsSize = lpSrcDIB->bmiHeader.biHeight * BytesPerLine((LPBYTE)&(lpSrcDIB->bmiHeader));
dwTargetBitsSize = lpbmi->bmiHeader.biHeight * BytesPerLine((LPBYTE)&(lpbmi->bmiHeader));
memcpy( lpSourceBits, FindDIBBits((LPBYTE)lpSrcDIB), dwSourceBitsSize );
lpbmi->bmiHeader.biSizeImage = dwTargetBitsSize;
// Select DIBSections into DCs
hOldSourceBitmap = (HBITMAP)SelectObject( hSourceDC, hSourceBitmap );
hOldTargetBitmap = (HBITMAP)SelectObject( hTargetDC, hTargetBitmap );
// Set the color tables for the DIBSections
if( lpSrcDIB->bmiHeader.biBitCount <= 8 )
SetDIBColorTable( hSourceDC, 0, 1 << lpSrcDIB->bmiHeader.biBitCount, lpSrcDIB->bmiColors );
if( lpbmi->bmiHeader.biBitCount <= 8 )
SetDIBColorTable( hTargetDC, 0, 1 << lpbmi->bmiHeader.biBitCount, lpbmi->bmiColors );
// We are asking for a straight copy, do it
BitBlt( hTargetDC, 0, 0, lpbmi->bmiHeader.biWidth, lpbmi->bmiHeader.biHeight, hSourceDC, 0, 0, SRCCOPY );
// Clean up and delete the DCs
SelectObject( hSourceDC, hOldSourceBitmap );
SelectObject( hTargetDC, hOldTargetBitmap );
DeleteDC( hSourceDC );
DeleteDC( hTargetDC );
ReleaseDC( NULL, hDC );
// Flush the GDI batch, so we can play with the bits
GdiFlush();
// Allocate enough memory for the new CF_DIB, and copy bits
dwSize = dwTargetHeaderSize + dwTargetBitsSize;
hNewDIB = GlobalAlloc(GHND, dwSize);
lpResult = (LPBYTE)GlobalLock(hNewDIB);//malloc( dwTargetHeaderSize + dwTargetBitsSize );
memcpy( lpResult, lpbmi, dwTargetHeaderSize );
memcpy( FindDIBBits( (LPBYTE)lpResult ), lpTargetBits, dwTargetBitsSize );
// final cleanup
DeleteObject( hTargetBitmap );
DeleteObject( hSourceBitmap );
free( lpbmi );
GlobalUnlock(hNewDIB);
return hNewDIB;
}
/* End ConvertDIBFormat() 3***************************************************/
/****************************************************************************
*
* FUNCTION: ConvertDIBFormat
*
* PURPOSE: Creates a new DIB of the requested format, copies the source
* image to the new DIB.
*
* PARAMS: HDIB hDIB - the source CF_DIB
* UINT nbpp - bpp for new DIB
* HPALETTE hPalSrc - Palette used to set new DIB
*
* RETURNS: HDIB - new CF_DIB handle
*
\****************************************************************************/
HDIB ConvertDIBFormat(HDIB hDIB, UINT nbpp, HPALETTE hPalSrc)
{
LPBITMAPINFO lpbmi = NULL;
LPBYTE lpSourceBits, lpTargetBits, lpResult;
HDC hDC = NULL, hSourceDC, hTargetDC;
HBITMAP hSourceBitmap, hTargetBitmap, hOldTargetBitmap, hOldSourceBitmap;
DWORD dwSourceBitsSize, dwTargetBitsSize, dwTargetHeaderSize, dwColorNum;
HANDLE hNewDIB;
DWORD dwSize;
int nWidth, nHeight;
// Get DIB pointer
if (! hDIB)
return NULL;
LPBITMAPINFO lpSrcDIB = (LPBITMAPINFO)GlobalLock(hDIB);
if (! lpSrcDIB)
return NULL;
nWidth = lpSrcDIB->bmiHeader.biWidth;
nHeight = lpSrcDIB->bmiHeader.biHeight;
// Allocate and fill out a BITMAPINFO struct for the new DIB
if (nbpp <= 8)
dwColorNum = 1 << nbpp;
else
dwColorNum = 0;
dwTargetHeaderSize = sizeof( BITMAPINFO ) + ( dwColorNum * sizeof( RGBQUAD ) );
lpbmi = (LPBITMAPINFO)malloc( dwTargetHeaderSize );
lpbmi->bmiHeader.biSize = sizeof( BITMAPINFOHEADER );
lpbmi->bmiHeader.biWidth = nWidth;
lpbmi->bmiHeader.biHeight = nHeight;
lpbmi->bmiHeader.biPlanes = 1;
lpbmi->bmiHeader.biBitCount = nbpp;
lpbmi->bmiHeader.biCompression = BI_RGB;
lpbmi->bmiHeader.biSizeImage = 0;
lpbmi->bmiHeader.biXPelsPerMeter = 0;
lpbmi->bmiHeader.biYPelsPerMeter = 0;
lpbmi->bmiHeader.biClrUsed = 0;
lpbmi->bmiHeader.biClrImportant = 0;
// Fill in the color table
if( ! CopyColorTable( lpbmi, (LPBITMAPINFO)lpSrcDIB, hPalSrc ) )
{
free( lpbmi );
return NULL;
}
// Gonna use DIBSections and BitBlt() to do the conversion, so make 'em
hDC = GetDC( NULL );
hTargetBitmap = CreateDIBSection( hDC, lpbmi, DIB_RGB_COLORS, (VOID **)&lpTargetBits, NULL, 0 );
hSourceBitmap = CreateDIBSection( hDC, lpSrcDIB, DIB_RGB_COLORS, (VOID **)&lpSourceBits, NULL, 0 );
hSourceDC = CreateCompatibleDC( hDC );
hTargetDC = CreateCompatibleDC( hDC );
// Flip the bits on the source DIBSection to match the source DIB
dwSourceBitsSize = lpSrcDIB->bmiHeader.biHeight * BytesPerLine((LPBYTE)&(lpSrcDIB->bmiHeader));
dwTargetBitsSize = lpbmi->bmiHeader.biHeight * BytesPerLine((LPBYTE)&(lpbmi->bmiHeader));
memcpy( lpSourceBits, FindDIBBits((LPBYTE)lpSrcDIB), dwSourceBitsSize );
lpbmi->bmiHeader.biSizeImage = dwTargetBitsSize;
// Select DIBSections into DCs
hOldSourceBitmap = (HBITMAP)SelectObject( hSourceDC, hSourceBitmap );
hOldTargetBitmap = (HBITMAP)SelectObject( hTargetDC, hTargetBitmap );
// Set the color tables for the DIBSections
if( lpSrcDIB->bmiHeader.biBitCount <= 8 )
SetDIBColorTable( hSourceDC, 0, 1 << lpSrcDIB->bmiHeader.biBitCount, lpSrcDIB->bmiColors );
if( lpbmi->bmiHeader.biBitCount <= 8 )
SetDIBColorTable( hTargetDC, 0, 1 << lpbmi->bmiHeader.biBitCount, lpbmi->bmiColors );
// We are asking for a straight copy, do it
BitBlt( hTargetDC, 0, 0, lpbmi->bmiHeader.biWidth, lpbmi->bmiHeader.biHeight, hSourceDC, 0, 0, SRCCOPY );
// Clean up and delete the DCs
SelectObject( hSourceDC, hOldSourceBitmap );
SelectObject( hTargetDC, hOldTargetBitmap );
DeleteDC( hSourceDC );
DeleteDC( hTargetDC );
ReleaseDC( NULL, hDC );
// Flush the GDI batch, so we can play with the bits
GdiFlush();
// Allocate enough memory for the new CF_DIB, and copy bits
dwSize = dwTargetHeaderSize + dwTargetBitsSize;
hNewDIB = GlobalAlloc(GHND, dwSize);
lpResult = (LPBYTE)GlobalLock(hNewDIB);//malloc( dwTargetHeaderSize + dwTargetBitsSize );
memcpy( lpResult, lpbmi, dwTargetHeaderSize );
memcpy( FindDIBBits( (LPBYTE)lpResult ), lpTargetBits, dwTargetBitsSize );
// final cleanup
DeleteObject( hTargetBitmap );
DeleteObject( hSourceBitmap );
free( lpbmi );
GlobalUnlock(hDIB);
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