www.pudn.com > VCдµÄMP3²¥·ÅÆ÷Ô´´úÂë.zip > GWExtDIBSectionLite.cpp
// GWExtDIBSectionLite.cpp: implementation of the GWExtDIBSectionLite class.
//
//////////////////////////////////////////////////////////////////////
//*******************************************************************************
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//-------------------------------------------------------------------------------
// Ö÷Ò³: http://www.ucancode.com
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//*******************************************************************************
#include "stdafx.h"
#include "GWExtDIBSectionLite.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
// Use C++ exception handling instead of structured on non-CE platforms.
#ifndef _WIN32_WCE
#undef TRY
#undef CATCH
#undef END_CATCH
#define TRY try
#define CATCH(ex_class, ex_object) catch(ex_class* ex_object)
#define END_CATCH
#endif // _WIN32_WCE
// Spit out some messages as a sanity check for programmers
#ifdef DIBSECTION_NO_DITHER
#pragma message(" - GWExtDIBSectionLite: No dithering")
#endif
#ifdef DIBSECTION_NO_MEMDC_REUSE
#pragma message(" - GWExtDIBSectionLite: No memory DC reuse")
#endif
#ifdef DIBSECTION_NO_PALETTE
#pragma message(" - GWExtDIBSectionLite: No palette support")
#endif
// Standard colors
RGBQUAD GWExtDIBSectionLite::ms_StdColors[] = {
{ 0x00, 0x00, 0x00, 0 }, // System palette - first 10 colors
{ 0x80, 0x00, 0x00, 0 },
{ 0x00, 0x80, 0x00, 0 },
{ 0x80, 0x80, 0x00, 0 },
{ 0x00, 0x00, 0x80, 0 },
{ 0x80, 0x00, 0x80, 0 },
{ 0x00, 0x80, 0x80, 0 },
{ 0xC0, 0xC0, 0xC0, 0 },
{ 0xC0, 0xDC, 0xC0, 0 },
{ 0xA6, 0xCA, 0xF0, 0 },
{ 0x2C, 0x00, 0x00, 0 },
{ 0x56, 0x00, 0x00, 0 },
{ 0x87, 0x00, 0x00, 0 },
{ 0xC0, 0x00, 0x00, 0 },
{ 0xFF, 0x00, 0x00, 0 },
{ 0x00, 0x2C, 0x00, 0 },
{ 0x2C, 0x2C, 0x00, 0 },
{ 0x56, 0x2C, 0x00, 0 },
{ 0x87, 0x2C, 0x00, 0 },
{ 0xC0, 0x2C, 0x00, 0 },
{ 0xFF, 0x2C, 0x00, 0 },
{ 0x00, 0x56, 0x00, 0 },
{ 0x2C, 0x56, 0x00, 0 },
{ 0x56, 0x56, 0x00, 0 },
{ 0x87, 0x56, 0x00, 0 },
{ 0xC0, 0x56, 0x00, 0 },
{ 0xFF, 0x56, 0x00, 0 },
{ 0x00, 0x87, 0x00, 0 },
{ 0x2C, 0x87, 0x00, 0 },
{ 0x56, 0x87, 0x00, 0 },
{ 0x87, 0x87, 0x00, 0 },
{ 0xC0, 0x87, 0x00, 0 },
{ 0xFF, 0x87, 0x00, 0 },
{ 0x00, 0xC0, 0x00, 0 },
{ 0x2C, 0xC0, 0x00, 0 },
{ 0x56, 0xC0, 0x00, 0 },
{ 0x87, 0xC0, 0x00, 0 },
{ 0xC0, 0xC0, 0x00, 0 },
{ 0xFF, 0xC0, 0x00, 0 },
{ 0x00, 0xFF, 0x00, 0 },
{ 0x2C, 0xFF, 0x00, 0 },
{ 0x56, 0xFF, 0x00, 0 },
{ 0x87, 0xFF, 0x00, 0 },
{ 0xC0, 0xFF, 0x00, 0 },
{ 0xFF, 0xFF, 0x00, 0 },
{ 0x00, 0x00, 0x2C, 0 },
{ 0x2C, 0x00, 0x2C, 0 },
{ 0x56, 0x00, 0x2C, 0 },
{ 0x87, 0x00, 0x2C, 0 },
{ 0xC0, 0x00, 0x2C, 0 },
{ 0xFF, 0x00, 0x2C, 0 },
{ 0x00, 0x2C, 0x2C, 0 },
{ 0x2C, 0x2C, 0x2C, 0 },
{ 0x56, 0x2C, 0x2C, 0 },
{ 0x87, 0x2C, 0x2C, 0 },
{ 0xC0, 0x2C, 0x2C, 0 },
{ 0xFF, 0x2C, 0x2C, 0 },
{ 0x00, 0x56, 0x2C, 0 },
{ 0x2C, 0x56, 0x2C, 0 },
{ 0x56, 0x56, 0x2C, 0 },
{ 0x87, 0x56, 0x2C, 0 },
{ 0xC0, 0x56, 0x2C, 0 },
{ 0xFF, 0x56, 0x2C, 0 },
{ 0x00, 0x87, 0x2C, 0 },
{ 0x2C, 0x87, 0x2C, 0 },
{ 0x56, 0x87, 0x2C, 0 },
{ 0x87, 0x87, 0x2C, 0 },
{ 0xC0, 0x87, 0x2C, 0 },
{ 0xFF, 0x87, 0x2C, 0 },
{ 0x00, 0xC0, 0x2C, 0 },
{ 0x2C, 0xC0, 0x2C, 0 },
{ 0x56, 0xC0, 0x2C, 0 },
{ 0x87, 0xC0, 0x2C, 0 },
{ 0xC0, 0xC0, 0x2C, 0 },
{ 0xFF, 0xC0, 0x2C, 0 },
{ 0x00, 0xFF, 0x2C, 0 },
{ 0x2C, 0xFF, 0x2C, 0 },
{ 0x56, 0xFF, 0x2C, 0 },
{ 0x87, 0xFF, 0x2C, 0 },
{ 0xC0, 0xFF, 0x2C, 0 },
{ 0xFF, 0xFF, 0x2C, 0 },
{ 0x00, 0x00, 0x56, 0 },
{ 0x2C, 0x00, 0x56, 0 },
{ 0x56, 0x00, 0x56, 0 },
{ 0x87, 0x00, 0x56, 0 },
{ 0xC0, 0x00, 0x56, 0 },
{ 0xFF, 0x00, 0x56, 0 },
{ 0x00, 0x2C, 0x56, 0 },
{ 0x2C, 0x2C, 0x56, 0 },
{ 0x56, 0x2C, 0x56, 0 },
{ 0x87, 0x2C, 0x56, 0 },
{ 0xC0, 0x2C, 0x56, 0 },
{ 0xFF, 0x2C, 0x56, 0 },
{ 0x00, 0x56, 0x56, 0 },
{ 0x2C, 0x56, 0x56, 0 },
{ 0x56, 0x56, 0x56, 0 },
{ 0x87, 0x56, 0x56, 0 },
{ 0xC0, 0x56, 0x56, 0 },
{ 0xFF, 0x56, 0x56, 0 },
{ 0x00, 0x87, 0x56, 0 },
{ 0x2C, 0x87, 0x56, 0 },
{ 0x56, 0x87, 0x56, 0 },
{ 0x87, 0x87, 0x56, 0 },
{ 0xC0, 0x87, 0x56, 0 },
{ 0xFF, 0x87, 0x56, 0 },
{ 0x00, 0xC0, 0x56, 0 },
{ 0x2C, 0xC0, 0x56, 0 },
{ 0x56, 0xC0, 0x56, 0 },
{ 0x87, 0xC0, 0x56, 0 },
{ 0xC0, 0xC0, 0x56, 0 },
{ 0xFF, 0xC0, 0x56, 0 },
{ 0x00, 0xFF, 0x56, 0 },
{ 0x2C, 0xFF, 0x56, 0 },
{ 0x56, 0xFF, 0x56, 0 },
{ 0x87, 0xFF, 0x56, 0 },
{ 0xC0, 0xFF, 0x56, 0 },
{ 0xFF, 0xFF, 0x56, 0 },
{ 0x00, 0x00, 0x87, 0 },
{ 0x2C, 0x00, 0x87, 0 },
{ 0x56, 0x00, 0x87, 0 },
{ 0x87, 0x00, 0x87, 0 },
{ 0xC0, 0x00, 0x87, 0 },
{ 0xFF, 0x00, 0x87, 0 },
{ 0x00, 0x2C, 0x87, 0 },
{ 0x2C, 0x2C, 0x87, 0 },
{ 0x56, 0x2C, 0x87, 0 },
{ 0x87, 0x2C, 0x87, 0 },
{ 0xC0, 0x2C, 0x87, 0 },
{ 0xFF, 0x2C, 0x87, 0 },
{ 0x00, 0x56, 0x87, 0 },
{ 0x2C, 0x56, 0x87, 0 },
{ 0x56, 0x56, 0x87, 0 },
{ 0x87, 0x56, 0x87, 0 },
{ 0xC0, 0x56, 0x87, 0 },
{ 0xFF, 0x56, 0x87, 0 },
{ 0x00, 0x87, 0x87, 0 },
{ 0x2C, 0x87, 0x87, 0 },
{ 0x56, 0x87, 0x87, 0 },
{ 0x87, 0x87, 0x87, 0 },
{ 0xC0, 0x87, 0x87, 0 },
{ 0xFF, 0x87, 0x87, 0 },
{ 0x00, 0xC0, 0x87, 0 },
{ 0x2C, 0xC0, 0x87, 0 },
{ 0x56, 0xC0, 0x87, 0 },
{ 0x87, 0xC0, 0x87, 0 },
{ 0xC0, 0xC0, 0x87, 0 },
{ 0xFF, 0xC0, 0x87, 0 },
{ 0x00, 0xFF, 0x87, 0 },
{ 0x2C, 0xFF, 0x87, 0 },
{ 0x56, 0xFF, 0x87, 0 },
{ 0x87, 0xFF, 0x87, 0 },
{ 0xC0, 0xFF, 0x87, 0 },
{ 0xFF, 0xFF, 0x87, 0 },
{ 0x00, 0x00, 0xC0, 0 },
{ 0x2C, 0x00, 0xC0, 0 },
{ 0x56, 0x00, 0xC0, 0 },
{ 0x87, 0x00, 0xC0, 0 },
{ 0xC0, 0x00, 0xC0, 0 },
{ 0xFF, 0x00, 0xC0, 0 },
{ 0x00, 0x2C, 0xC0, 0 },
{ 0x2C, 0x2C, 0xC0, 0 },
{ 0x56, 0x2C, 0xC0, 0 },
{ 0x87, 0x2C, 0xC0, 0 },
{ 0xC0, 0x2C, 0xC0, 0 },
{ 0xFF, 0x2C, 0xC0, 0 },
{ 0x00, 0x56, 0xC0, 0 },
{ 0x2C, 0x56, 0xC0, 0 },
{ 0x56, 0x56, 0xC0, 0 },
{ 0x87, 0x56, 0xC0, 0 },
{ 0xC0, 0x56, 0xC0, 0 },
{ 0xFF, 0x56, 0xC0, 0 },
{ 0x00, 0x87, 0xC0, 0 },
{ 0x2C, 0x87, 0xC0, 0 },
{ 0x56, 0x87, 0xC0, 0 },
{ 0x87, 0x87, 0xC0, 0 },
{ 0xC0, 0x87, 0xC0, 0 },
{ 0xFF, 0x87, 0xC0, 0 },
{ 0x00, 0xC0, 0xC0, 0 },
{ 0x2C, 0xC0, 0xC0, 0 },
{ 0x56, 0xC0, 0xC0, 0 },
{ 0x87, 0xC0, 0xC0, 0 },
{ 0xFF, 0xC0, 0xC0, 0 },
{ 0x00, 0xFF, 0xC0, 0 },
{ 0x2C, 0xFF, 0xC0, 0 },
{ 0x56, 0xFF, 0xC0, 0 },
{ 0x87, 0xFF, 0xC0, 0 },
{ 0xC0, 0xFF, 0xC0, 0 },
{ 0xFF, 0xFF, 0xC0, 0 },
{ 0x00, 0x00, 0xFF, 0 },
{ 0x2C, 0x00, 0xFF, 0 },
{ 0x56, 0x00, 0xFF, 0 },
{ 0x87, 0x00, 0xFF, 0 },
{ 0xC0, 0x00, 0xFF, 0 },
{ 0xFF, 0x00, 0xFF, 0 },
{ 0x00, 0x2C, 0xFF, 0 },
{ 0x2C, 0x2C, 0xFF, 0 },
{ 0x56, 0x2C, 0xFF, 0 },
{ 0x87, 0x2C, 0xFF, 0 },
{ 0xC0, 0x2C, 0xFF, 0 },
{ 0xFF, 0x2C, 0xFF, 0 },
{ 0x00, 0x56, 0xFF, 0 },
{ 0x2C, 0x56, 0xFF, 0 },
{ 0x56, 0x56, 0xFF, 0 },
{ 0x87, 0x56, 0xFF, 0 },
{ 0xC0, 0x56, 0xFF, 0 },
{ 0xFF, 0x56, 0xFF, 0 },
{ 0x00, 0x87, 0xFF, 0 },
{ 0x2C, 0x87, 0xFF, 0 },
{ 0x56, 0x87, 0xFF, 0 },
{ 0x87, 0x87, 0xFF, 0 },
{ 0xC0, 0x87, 0xFF, 0 },
{ 0xFF, 0x87, 0xFF, 0 },
{ 0x00, 0xC0, 0xFF, 0 },
{ 0x2C, 0xC0, 0xFF, 0 },
{ 0x56, 0xC0, 0xFF, 0 },
{ 0x87, 0xC0, 0xFF, 0 },
{ 0xC0, 0xC0, 0xFF, 0 },
{ 0xFF, 0xC0, 0xFF, 0 },
{ 0x2C, 0xFF, 0xFF, 0 },
{ 0x56, 0xFF, 0xFF, 0 },
{ 0x87, 0xFF, 0xFF, 0 },
{ 0xC0, 0xFF, 0xFF, 0 },
{ 0xFF, 0xFF, 0xFF, 0 },
{ 0x11, 0x11, 0x11, 0 },
{ 0x18, 0x18, 0x18, 0 },
{ 0x1E, 0x1E, 0x1E, 0 },
{ 0x25, 0x25, 0x25, 0 },
{ 0x2C, 0x2C, 0x2C, 0 },
{ 0x34, 0x34, 0x34, 0 },
{ 0x3C, 0x3C, 0x3C, 0 },
{ 0x44, 0x44, 0x44, 0 },
{ 0x4D, 0x4D, 0x4D, 0 },
{ 0x56, 0x56, 0x56, 0 },
{ 0x5F, 0x5F, 0x5F, 0 },
{ 0x69, 0x69, 0x69, 0 },
{ 0x72, 0x72, 0x72, 0 },
{ 0x7D, 0x7D, 0x7D, 0 },
{ 0x92, 0x92, 0x92, 0 },
{ 0x9D, 0x9D, 0x9D, 0 },
{ 0xA8, 0xA8, 0xA8, 0 },
{ 0xB4, 0xB4, 0xB4, 0 },
{ 0xCC, 0xCC, 0xCC, 0 },
{ 0xD8, 0xD8, 0xD8, 0 },
{ 0xE5, 0xE5, 0xE5, 0 },
{ 0xF2, 0xF2, 0xF2, 0 },
{ 0xFF, 0xFF, 0xFF, 0 },
{ 0xFF, 0xFB, 0xF0, 0 }, // System palette - last 10 colors
{ 0xA0, 0xA0, 0xA4, 0 },
{ 0x80, 0x80, 0x80, 0 },
{ 0xFF, 0x00, 0x00, 0 },
{ 0x00, 0xFF, 0x00, 0 },
{ 0xFF, 0xFF, 0x00, 0 },
{ 0x00, 0x00, 0xFF, 0 },
{ 0xFF, 0x00, 0xFF, 0 },
{ 0x00, 0xFF, 0xFF, 0 },
{ 0xFF, 0xFF, 0xFF, 0 },
};
/////////////////////////////////////////////////////////////////////////////
// CE DIBSection global functions
#ifdef _WIN32_WCE
UINT CEGetDIBColorTable(HDC hdc, UINT uStartIndex, UINT cEntries, RGBQUAD *pColors);
#endif
/////////////////////////////////////////////////////////////////////////////
// GWExtDIBSectionLite static functions
//
// --- In : nBitsPerPixel - bits per pixel
// nCompression - type of compression
// --- Out :
// --- Returns :The number of colors for this color depth
// --- Effect : Returns the number of color table entries given the number
// of bits per pixel of a bitmap
/*static*/ int GWExtDIBSectionLite::NumColorEntries(int nBitsPerPixel, int nCompression)
{
int nColors = 0;
switch (nBitsPerPixel)
{
case 1:
nColors = 2;
break;
#ifdef _WIN32_WCE
case 2:
nColors = 4;
break; // winCE only
#endif
case 4:
nColors = 16;
break;
case 8:
nColors = 256;
break;
case 24:
nColors = 0;
case 16:
case 32:
if (nCompression == BI_BITFIELDS)
nColors = 3; // 16 or 32 bpp have 3 colors(masks) in the color table if bitfield compression
else
nColors = 0; // 16 or 32 bpp have no color table if no bitfield compression
break;
default:
ASSERT(FALSE);
}
return nColors;
}
//
// --- In : nWidth - image width in pixels
// nBitsPerPixel - bits per pixel
// --- Out :
// --- Returns : Returns the number of storage bytes needed for each scanline
// in the bitmap
// --- Effect :
/*static*/ int GWExtDIBSectionLite::BytesPerLine(int nWidth, int nBitsPerPixel)
{
return ( (nWidth * nBitsPerPixel + 31) & (~31) ) / 8;
}
#ifndef DIBSECTION_NO_PALETTE
// --- In : palette - reference to a palette object which will be filled
// nNumColors - number of color entries to fill
// --- Out :
// --- Returns : TRUE on success, false otherwise
// --- Effect : Creates a halftone color palette independant of screen color depth.
// palette will be filled with the colors, and nNumColors is the No.
// of colors to file. If nNumColorsis 0 or > 256, then 256 colors are used.
/*static*/ BOOL GWExtDIBSectionLite::CreateHalftonePalette(CPalette& palette, int nNumColors)
{
palette.DeleteObject();
// Sanity check on requested number of colours.
if (nNumColors <= 0 || nNumColors > 256)
nNumColors = 256;
else if (nNumColors <= 2)
nNumColors = 2;
else if (nNumColors <= 16)
nNumColors = 16;
else if (nNumColors <= 256)
nNumColors = 256;
PALETTEINFO pi;
pi.palNumEntries = (WORD) nNumColors;
if (nNumColors == 2)
{
// According to the MS article "The Palette Manager: How and Why"
// monochrome palettes not really needed (will use B&W)
pi.palPalEntry[0].peRed = ms_StdColors[0].rgbRed;
pi.palPalEntry[0].peGreen = ms_StdColors[0].rgbGreen;
pi.palPalEntry[0].peBlue = ms_StdColors[0].rgbBlue;
pi.palPalEntry[0].peFlags = 0;
pi.palPalEntry[1].peRed = ms_StdColors[255].rgbRed;
pi.palPalEntry[1].peGreen = ms_StdColors[255].rgbGreen;
pi.palPalEntry[1].peBlue = ms_StdColors[255].rgbBlue;
pi.palPalEntry[1].peFlags = 0;
}
else if (nNumColors == 16)
{
// According to the MS article "The Palette Manager: How and Why"
// 4-bit palettes not really needed (will use VGA palette)
for (int i = 0; i < 8; i++)
{
pi.palPalEntry[i].peRed = ms_StdColors[i].rgbRed;
pi.palPalEntry[i].peGreen = ms_StdColors[i].rgbGreen;
pi.palPalEntry[i].peBlue = ms_StdColors[i].rgbBlue;
pi.palPalEntry[i].peFlags = 0;
}
for (i = 8; i < 16; i++)
{
pi.palPalEntry[i].peRed = ms_StdColors[248+i].rgbRed;
pi.palPalEntry[i].peGreen = ms_StdColors[248+i].rgbGreen;
pi.palPalEntry[i].peBlue = ms_StdColors[248+i].rgbBlue;
pi.palPalEntry[i].peFlags = 0;
}
}
else // if (nNumColors == 256)
{
// Fill palette with full halftone palette
for (int i = 0; i < 256; i++)
{
pi.palPalEntry[i].peRed = ms_StdColors[i].rgbRed;
pi.palPalEntry[i].peGreen = ms_StdColors[i].rgbGreen;
pi.palPalEntry[i].peBlue = ms_StdColors[i].rgbBlue;
pi.palPalEntry[i].peFlags = 0;
}
}
return palette.CreatePalette((LPLOGPALETTE) pi);
}
#endif // DIBSECTION_NO_PALETTE
/////////////////////////////////////////////////////////////////////////////
// GWExtDIBSectionLite
GWExtDIBSectionLite::GWExtDIBSectionLite()
{
// Just in case...
ASSERT(sizeof(ms_StdColors) / sizeof(ms_StdColors[0]) == 256);
m_hBitmap = NULL;
m_hOldBitmap = NULL;
#ifndef DIBSECTION_NO_MEMDC_REUSE
m_bReuseMemDC = FALSE;
#endif
#ifndef DIBSECTION_NO_PALETTE
m_pOldPalette = NULL;
#endif
#ifndef DIBSECTION_NO_DITHER
m_bDither = FALSE;
m_hDrawDib = NULL;
#endif
DeleteObject(); // This will initialise to a known state - ie. empty
}
GWExtDIBSectionLite::~GWExtDIBSectionLite()
{
DeleteObject();
}
// --- In :
// --- Out :
// --- Returns :
// --- Effect : Resets the object to an empty state, and frees all memory used.
void GWExtDIBSectionLite::DeleteObject()
{
// Unselect the bitmap out of the memory DC before deleting bitmap
ReleaseMemoryDC(TRUE);
if (m_hBitmap)
::DeleteObject(m_hBitmap);
m_hBitmap = NULL;
m_ppvBits = NULL;
#ifndef DIBSECTION_NO_PALETTE
m_Palette.DeleteObject();
#endif
memset(&m_DIBinfo, 0, sizeof(m_DIBinfo));
#ifndef DIBSECTION_NO_DITHER
if (m_hDrawDib)
DrawDibClose(m_hDrawDib);
m_hDrawDib = NULL;
#endif
m_iColorDataType = DIB_RGB_COLORS;
m_iColorTableSize = 0;
}
/////////////////////////////////////////////////////////////////////////////
// GWExtDIBSectionLite diagnostics
#ifdef _DEBUG
void GWExtDIBSectionLite::AssertValid() const
{
ASSERT(m_hBitmap);
DIBSECTION ds;
DWORD dwSize = GetObject( m_hBitmap, sizeof(DIBSECTION), &ds );
ASSERT(dwSize == sizeof(DIBSECTION));
ASSERT(0 <= m_iColorTableSize && m_iColorTableSize <= 256);
CObject::AssertValid();
}
void GWExtDIBSectionLite::Dump(CDumpContext& dc) const
{
CObject::Dump(dc);
}
#endif //_DEBUG
/////////////////////////////////////////////////////////////////////////////
// GWExtDIBSectionLite operations
#ifndef DIBSECTION_NO_DITHER
// --- In : bDither - whether or not dithering should be enabled
// --- Out :
// --- Returns : TRUE on success
// --- Effect : Turns dithering on by using the DrawDib functions instead of
// the GDI functions
BOOL GWExtDIBSectionLite::SetDither(BOOL bDither)
{
if ( (m_bDither == bDither) &&
((m_hDrawDib && m_bDither) || (!m_hDrawDib && !m_bDither)) )
return TRUE;
if (!bDither && m_hDrawDib != NULL)
{
DrawDibClose(m_hDrawDib);
m_hDrawDib = NULL;
}
m_bDither = bDither;
return TRUE;
}
// --- In :
// --- Out :
// --- Returns : TRUE if dithering is used
// --- Effect : Returns whether or not the DrawDib functions (and hence dithering)
// is being used.
BOOL GWExtDIBSectionLite::GetDither()
{
return (m_bDither && GetBitCount() > 8);
}
// --- In :
// --- Out :
// --- Returns : A DrawDib context if dithering is supported, else NULL
// --- Effect : Returns a drawdib context for use with DrawDib routines
HDRAWDIB GWExtDIBSectionLite::GetDrawDibContext()
{
if (!GetDither())
return NULL;
if (m_hDrawDib)
return m_hDrawDib;
m_hDrawDib = DrawDibOpen();
return m_hDrawDib;
}
#endif
// --- In : pDC - Pointer to a device context
// ptDest - point at which the topleft corner of the image is drawn
// --- Out :
// --- Returns : TRUE on success
// --- Effect : Draws the image 1:1 on the device context
BOOL GWExtDIBSectionLite::Draw(CDC* pDC, CPoint ptDest, BOOL bForceBackground /*=FALSE*/)
{
if (!m_hBitmap)
return FALSE;
CSize size = GetSize();
CPoint ptOrigin = CPoint(0,0);
BOOL bResult = FALSE;
#ifndef DIBSECTION_NO_DITHER
// We will only be able to get a HDRAWDIB if dithering is enabled
HDRAWDIB hDrawDib = GetDrawDibContext();
if (hDrawDib)
{
#ifndef DIBSECTION_NO_PALETTE
DrawDibSetPalette( hDrawDib, (HPALETTE)m_Palette);
DrawDibRealize( hDrawDib, pDC->GetSafeHdc(), FALSE);
#endif // DIBSECTION_NO_PALETTE
bResult = DrawDibDraw(hDrawDib, pDC->GetSafeHdc(),
ptDest.x, ptDest.y, size.cx, size.cy,
GetBitmapInfoHeader(), GetDIBits(),
ptOrigin.x, ptOrigin.y, size.cx, size.cy,
0/*DDF_HALFTONE*/);
}
else
{
#endif
// Create a memory DC compatible with the destination DC
CDC* pMemDC = GetMemoryDC(pDC, FALSE);
if (!pMemDC)
return FALSE;
#ifndef DIBSECTION_NO_PALETTE
// Select and realize the palette
CPalette* pOldPalette = NULL;
if (m_Palette.m_hObject && UsesPalette(pDC))
{
pOldPalette = pDC->SelectPalette(&m_Palette, bForceBackground);
pDC->RealizePalette();
}
#endif // DIBSECTION_NO_PALETTE
bResult = pDC->BitBlt(ptDest.x, ptDest.y, size.cx, size.cy, pMemDC,
ptOrigin.x, ptOrigin.y, SRCCOPY);
#ifndef DIBSECTION_NO_PALETTE
if (pOldPalette)
pDC->SelectPalette(pOldPalette, FALSE);
#endif // DIBSECTION_NO_PALETTE
ReleaseMemoryDC();
#ifndef DIBSECTION_NO_DITHER
}
#endif // DIBSECTION_NO_DITHER
return bResult;
}
// --- In : pDC - Pointer to a device context
// ptDest - point at which the topleft corner of the image is drawn
// size - size to stretch the image
// --- Out :
// --- Returns : TRUE on success
// --- Effect : Stretch draws the image to the desired size on the device context
BOOL GWExtDIBSectionLite::Stretch(CDC* pDC, CPoint ptDest, CSize size,
BOOL bForceBackground /*=FALSE*/)
{
if (!m_hBitmap)
return FALSE;
CPoint ptOrigin = CPoint(0,0);
CSize imagesize = GetSize();
BOOL bResult = FALSE;
#ifndef _WIN32_WCE
pDC->SetStretchBltMode(COLORONCOLOR);
#endif
#ifndef DIBSECTION_NO_DITHER
// We will only be able to get a HDRAWDIB if dithering is enabled
HDRAWDIB hDrawDib = GetDrawDibContext();
if (hDrawDib)
{
#ifndef DIBSECTION_NO_PALETTE
DrawDibSetPalette( hDrawDib, (HPALETTE)m_Palette);
DrawDibRealize( hDrawDib, pDC->GetSafeHdc(), FALSE);
#endif // DIBSECTION_NO_PALETTE
bResult = DrawDibDraw(hDrawDib, pDC->GetSafeHdc(),
ptDest.x, ptDest.y, size.cx, size.cy,
GetBitmapInfoHeader(), GetDIBits(),
0,0, GetWidth(), GetHeight(),
0/*DDF_HALFTONE*/);
}
else
{
#endif // DIBSECTION_NO_DITHER
// Create a memory DC compatible with the destination DC
CDC* pMemDC = GetMemoryDC(pDC, FALSE);
if (!pMemDC)
return FALSE;
#ifndef DIBSECTION_NO_PALETTE
// Select and realize the palette
CPalette* pOldPalette = NULL;
if (m_Palette.m_hObject && UsesPalette(pDC))
{
pOldPalette = pDC->SelectPalette(&m_Palette, bForceBackground);
pDC->RealizePalette();
}
#endif // DIBSECTION_NO_PALETTE
#ifndef _WIN32_WCE
pDC->SetStretchBltMode(COLORONCOLOR);
#endif // _WIN32_WCE
bResult = pDC->StretchBlt(ptDest.x, ptDest.y, size.cx, size.cy,
pMemDC,
ptOrigin.x, ptOrigin.y, imagesize.cx, imagesize.cy,
SRCCOPY);
#ifndef DIBSECTION_NO_PALETTE
if (pOldPalette)
pDC->SelectPalette(pOldPalette, FALSE);
#endif // DIBSECTION_NO_PALETTE
ReleaseMemoryDC();
#ifndef DIBSECTION_NO_DITHER
}
#endif // DIBSECTION_NO_DITHER
return bResult;
}
//////////////////////////////////////////////////////////////////////////////
// Setting the bitmap...
// --- In : nIDResource - resource ID
// --- Out :
// --- Returns : Returns TRUE on success, FALSE otherwise
// --- Effect : Initialises the bitmap from a resource. If failure, then object is
// initialised back to an empty bitmap.
BOOL GWExtDIBSectionLite::SetBitmap(UINT nIDResource)
{
return SetBitmap(MAKEINTRESOURCE(nIDResource));
}
// --- In : lpszResourceName - resource name
// --- Out :
// --- Returns : Returns TRUE on success, FALSE otherwise
// --- Effect : Initialises the bitmap from a resource. If failure, then object is
// initialised back to an empty bitmap.
BOOL GWExtDIBSectionLite::SetBitmap(LPCTSTR lpszResourceName)
{
HBITMAP hBmp = (HBITMAP)::LoadImage(AfxGetResourceHandle(),
lpszResourceName,
IMAGE_BITMAP,
0,0,
#ifdef _WIN32_WCE
0
#else
LR_CREATEDIBSECTION
#endif
);
if (!hBmp)
{
TRACE0("Unable to LoadImage");
return FALSE;
}
BOOL bResult = SetBitmap(hBmp);
::DeleteObject(hBmp);
return bResult;
}
// --- In : lpBitmapInfo - pointer to a BITMAPINFO structure
// lpBits - pointer to image bits
// --- Out :
// --- Returns : Returns TRUE on success, FALSE otherwise
// --- Effect : Initialises the bitmap using the information in lpBitmapInfo to determine
// the dimensions and colors, and the then sets the bits from the bits in
// lpBits. If failure, then object is initialised back to an empty bitmap.
BOOL GWExtDIBSectionLite::SetBitmap(LPBITMAPINFO lpBitmapInfo, LPVOID lpBits)
{
DeleteObject();
if (!lpBitmapInfo || !lpBits)
return FALSE;
HDC hDC = NULL;
TRY {
BITMAPINFOHEADER& bmih = lpBitmapInfo->bmiHeader;
// Compute the number of colors in the color table
m_iColorTableSize = NumColorEntries(bmih.biBitCount, bmih.biCompression);
DWORD dwBitmapInfoSize = sizeof(BITMAPINFO) + m_iColorTableSize*sizeof(RGBQUAD);
// Copy over BITMAPINFO contents
memcpy(&m_DIBinfo, lpBitmapInfo, dwBitmapInfoSize);
// Should now have all the info we need to create the sucker.
//TRACE(_T("Width %d, Height %d, Bits/pixel %d, Image Size %d\n"),
// bmih.biWidth, bmih.biHeight, bmih.biBitCount, bmih.biSizeImage);
// Create a DC which will be used to get DIB, then create DIBsection
hDC = ::GetDC(NULL);
if (!hDC)
{
TRACE0("Unable to get DC\n");
AfxThrowResourceException();
}
m_hBitmap = CreateDIBSection(hDC, (const BITMAPINFO*) m_DIBinfo,
m_iColorDataType, &m_ppvBits, NULL, 0);
::ReleaseDC(NULL, hDC);
if (!m_hBitmap)
{
TRACE0("CreateDIBSection failed\n");
AfxThrowResourceException();
}
if (m_DIBinfo.bmiHeader.biSizeImage == 0)
{
int nBytesPerLine = BytesPerLine(lpBitmapInfo->bmiHeader.biWidth,
lpBitmapInfo->bmiHeader.biBitCount);
m_DIBinfo.bmiHeader.biSizeImage = nBytesPerLine * lpBitmapInfo->bmiHeader.biHeight;
}
#ifndef _WIN32_WCE
// Flush the GDI batch queue
GdiFlush();
#endif
memcpy(m_ppvBits, lpBits, m_DIBinfo.bmiHeader.biSizeImage);
#ifndef DIBSECTION_NO_PALETTE
if (!CreatePalette())
{
TRACE0("Unable to create palette\n");
AfxThrowResourceException();
}
#endif // DIBSECTION_NO_PALETTE
}
CATCH (CException, e)
{
e->Delete();
_ShowLastError();
if (hDC)
::ReleaseDC(NULL, hDC);
DeleteObject();
return FALSE;
}
END_CATCH
return TRUE;
}
// --- In : hBitmap - handle to image
// pPalette - optional palette to use when setting image
// --- Out :
// --- Returns : Returns TRUE on success, FALSE otherwise
// --- Effect : Initialises the bitmap from the HBITMAP supplied. If failure, then
// object is initialised back to an empty bitmap.
BOOL GWExtDIBSectionLite::SetBitmap(HBITMAP hBitmap
#ifndef DIBSECTION_NO_PALETTE
, CPalette* pPalette /*= NULL*/
#endif
)
{
DeleteObject();
if (!hBitmap)
return FALSE;
// Get dimensions of bitmap
BITMAP bm;
if (!::GetObject(hBitmap, sizeof(bm),(LPVOID)&bm))
return FALSE;
bm.bmHeight = abs(bm.bmHeight);
CWindowDC dc(NULL);
#ifndef DIBSECTION_NO_PALETTE
CPalette* pOldPalette = NULL;
#endif // DIBSECTION_NO_PALETTE
TRY {
m_iColorTableSize = NumColorEntries(bm.bmBitsPixel, BI_RGB);
// Initialize the BITMAPINFOHEADER in m_DIBinfo
BITMAPINFOHEADER& bih = m_DIBinfo.bmiHeader;
bih.biSize = sizeof(BITMAPINFOHEADER);
bih.biWidth = bm.bmWidth;
bih.biHeight = bm.bmHeight;
bih.biPlanes = 1; // Must always be 1 according to docs
bih.biBitCount = bm.bmBitsPixel;
bih.biCompression = BI_RGB;
bih.biSizeImage = BytesPerLine(bm.bmWidth, bm.bmBitsPixel) * bm.bmHeight;
bih.biXPelsPerMeter = 0;
bih.biYPelsPerMeter = 0;
bih.biClrUsed = 0;
bih.biClrImportant = 0;
GetColorTableEntries(dc.GetSafeHdc(), hBitmap);
#ifndef DIBSECTION_NO_PALETTE
// If we have a palette supplied, then set the palette (and hance DIB color
// table) using this palette
if (pPalette)
SetPalette(pPalette);
if (m_Palette.GetSafeHandle())
{
pOldPalette = dc.SelectPalette(&m_Palette, FALSE);
dc.RealizePalette();
}
#endif // DIBSECTION_NO_PALETTE
// Create it!
m_hBitmap = CreateDIBSection(dc.m_hDC,
(const BITMAPINFO*) m_DIBinfo,
m_iColorDataType,
&m_ppvBits,
NULL, 0);
#ifndef DIBSECTION_NO_PALETTE
if (pOldPalette)
dc.SelectPalette(pOldPalette, FALSE);
pOldPalette = NULL;
#endif // DIBSECTION_NO_PALETTE
if (!m_hBitmap)
{
TRACE0("Unable to CreateDIBSection\n");
AfxThrowResourceException();
}
#ifndef DIBSECTION_NO_PALETTE
// If palette was supplied then create a palette using the entries in the DIB
// color table.
if (!pPalette)
CreatePalette();
#endif // DIBSECTION_NO_PALETTE
// Need to copy the supplied bitmap onto the newly created DIBsection
CDC memDC, CopyDC;
if (!CopyDC.CreateCompatibleDC(&dc) || !memDC.CreateCompatibleDC(&dc))
{
TRACE0("Unable to create compatible DC's\n");
AfxThrowResourceException();
}
#ifndef DIBSECTION_NO_PALETTE
if (m_Palette.GetSafeHandle())
{
memDC.SelectPalette(&m_Palette, FALSE); memDC.RealizePalette();
CopyDC.SelectPalette(&m_Palette, FALSE); CopyDC.RealizePalette();
}
#endif // DIBSECTION_NO_PALETTE
#ifndef _WIN32_WCE
// Flush the GDI batch queue
GdiFlush();
#endif
HBITMAP hOldMemBitmap = (HBITMAP) SelectObject(memDC.m_hDC, hBitmap);
HBITMAP hOldCopyBitmap = (HBITMAP) SelectObject(CopyDC.m_hDC, m_hBitmap);
CopyDC.BitBlt(0,0, bm.bmWidth, bm.bmHeight, &memDC, 0,0, SRCCOPY);
SelectObject(memDC.m_hDC, hOldMemBitmap);
SelectObject(CopyDC.m_hDC, hOldCopyBitmap);
#ifndef DIBSECTION_NO_PALETTE
if (m_Palette.GetSafeHandle())
{
memDC.SelectStockObject(DEFAULT_PALETTE);
CopyDC.SelectStockObject(DEFAULT_PALETTE);
}
#endif // DIBSECTION_NO_PALETTE
}
CATCH (CException, e)
{
e->Delete();
_ShowLastError();
#ifndef DIBSECTION_NO_PALETTE
if (pOldPalette)
dc.SelectPalette(pOldPalette, FALSE);
#endif // DIBSECTION_NO_PALETTE
DeleteObject();
return FALSE;
}
END_CATCH
return TRUE;
}
//////////////////////////////////////////////////////////////////////////////
// Persistance...
// --- In : lpszFileName - image filename
// --- Out :
// --- Returns : Returns TRUE on success, FALSE otherwise
// --- Effect : Loads the bitmap from a bitmap file with the name lpszFileName.
// If failure, then object is initialised back to an empty bitmap.
BOOL GWExtDIBSectionLite::Load(LPCTSTR lpszFileName)
{
CFile file;
if (!file.Open(lpszFileName, CFile::modeRead))
return FALSE;
// Get the current file position.
DWORD dwFileStart = file.GetPosition();
// The first part of the file contains the file header.
// This will tell us if it is a bitmap, how big the header is, and how big
// the file is. The header size in the file header includes the color table.
BITMAPFILEHEADER BmpFileHdr;
int nBytes;
nBytes = file.Read(&BmpFileHdr, sizeof(BmpFileHdr));
if (nBytes != sizeof(BmpFileHdr))
{
TRACE0("Failed to read file header\n");
return FALSE;
}
// Check that we have the magic 'BM' at the start.
if (BmpFileHdr.bfType != DS_BITMAP_FILEMARKER)
{
TRACE0("Not a bitmap file\n");
return FALSE;
}
// Read the header (assuming it's a DIB).
DIBINFO BmpInfo;
nBytes = file.Read(&BmpInfo, sizeof(BITMAPINFOHEADER));
if (nBytes != sizeof(BITMAPINFOHEADER))
{
TRACE0("Failed to read BITMAPINFOHEADER\n");
return FALSE;
}
// Check that we have a real Windows DIB file.
if (BmpInfo.bmiHeader.biSize != sizeof(BITMAPINFOHEADER))
{
TRACE0(" File is not a Windows DIB\n");
return FALSE;
}
// See how big the color table is in the file (if there is one).
int nColors = NumColorEntries(BmpInfo.bmiHeader.biBitCount, BmpInfo.bmiHeader.biCompression);
if (nColors > 0)
{
// Read the color table from the file.
int nColorTableSize = nColors * sizeof(RGBQUAD);
nBytes = file.Read(BmpInfo.ColorTable(), nColorTableSize);
if (nBytes != nColorTableSize)
{
TRACE0("Failed to read color table\n");
return FALSE;
}
}
// So how big the bitmap surface is.
int nBitsSize = BmpFileHdr.bfSize - BmpFileHdr.bfOffBits;
// Allocate the memory for the bits and read the bits from the file.
BYTE* pBits = (BYTE*) malloc(nBitsSize);
if (!pBits)
{
TRACE0("Out of memory for DIB bits\n");
return FALSE;
}
// Seek to the bits in the file.
file.Seek(dwFileStart + BmpFileHdr.bfOffBits, CFile::begin);
// read the bits
nBytes = file.Read(pBits, nBitsSize);
if (nBytes != nBitsSize)
{
TRACE0("Failed to read bits\n");
free(pBits);
return FALSE;
}
// Everything went OK.
BmpInfo.bmiHeader.biSizeImage = nBitsSize;
if (!SetBitmap((LPBITMAPINFO) BmpInfo, pBits))
{
TRACE0("Failed to set bitmap info\n");
free(pBits);
return FALSE;
}
free(pBits);
return TRUE;
}
// --- In : lpszFileName - image filename
// --- Out :
// --- Returns : Returns TRUE on success, FALSE otherwise
// --- Effect : Saves the image to file.
BOOL GWExtDIBSectionLite::Save(LPCTSTR lpszFileName)
{
BITMAPFILEHEADER hdr;
LPBITMAPINFOHEADER lpbi = GetBitmapInfoHeader();
if (!lpbi || !lpszFileName)
return FALSE;
CFile file;
if (!file.Open(lpszFileName, CFile::modeWrite|CFile::modeCreate))
return FALSE;
DWORD dwBitmapInfoSize = sizeof(BITMAPINFO) + m_iColorTableSize*sizeof(RGBQUAD);
DWORD dwFileHeaderSize = dwBitmapInfoSize + sizeof(hdr);
// Fill in the fields of the file header
hdr.bfType = DS_BITMAP_FILEMARKER;
hdr.bfSize = dwFileHeaderSize + lpbi->biSizeImage;
hdr.bfReserved1 = 0;
hdr.bfReserved2 = 0;
hdr.bfOffBits = dwFileHeaderSize;
// Write the file header
file.Write(&hdr, sizeof(hdr));
// Write the DIB header
file.Write(lpbi, dwBitmapInfoSize);
// Write DIB bits
file.Write(GetDIBits(), lpbi->biSizeImage);
return TRUE;
}
// --- In : Bitmap - DIBSection object to be copied
// --- Out :
// --- Returns : Returns TRUE on success, FALSE otherwise
// --- Effect : Creates a copy of another CDIBSection object
BOOL GWExtDIBSectionLite::Copy(GWExtDIBSectionLite& Bitmap)
{
BOOL bResult = SetBitmap(Bitmap.GetBitmapInfo(), Bitmap.GetDIBits());
if (bResult)
{
SetColorTable(Bitmap.GetColorTableSize(), Bitmap.GetColorTable());
#ifndef DIBSECTION_NO_PALETTE
CreatePalette();
#endif
#ifndef DIBSECTION_NO_DITHER
SetDither(Bitmap.GetDither());
#endif
}
return bResult;
}
/////////////////////////////////////////////////////////////////////////////
// GWExtDIBSectionLite palette stuff
// --- In : nNumColors - number of colors to set
// pColors - array of RGBQUAD's containing colors to set
// --- Out :
// --- Returns : Returns TRUE on success, FALSE otherwise
// --- Effect : Sets the colors used by the image. Only works if # colors <= 256
BOOL GWExtDIBSectionLite::SetColorTable(UINT nNumColors, RGBQUAD *pColors)
{
if (!m_hBitmap ||!pColors || !nNumColors || m_iColorTableSize == 0
|| nNumColors > 256)
return FALSE;
#ifdef _WIN32_WCE
LPRGBQUAD pColorTable = GetColorTable();
ASSERT(pColorTable);
int nCount = min(m_iColorTableSize, nNumColors);
::memset(pColorTable, 0, m_iColorTableSize*sizeof(RGBQUAD));
::memcpy(pColorTable, pColors, nCount*sizeof(RGBQUAD));
#else
// Create a memory DC compatible with the screen
CDC MemDC;
if (!MemDC.CreateCompatibleDC(NULL))
return FALSE;
HBITMAP hOldBitmap = (HBITMAP) ::SelectObject(MemDC.GetSafeHdc(), m_hBitmap);
::SetDIBColorTable(MemDC.GetSafeHdc(), 0, nNumColors, pColors);
// Clean up
if (hOldBitmap)
::SelectObject(MemDC.GetSafeHdc(), hOldBitmap);
#endif
return TRUE;
}
#ifndef DIBSECTION_NO_PALETTE
// --- In :
// --- Out :
// --- Returns : TRUE on success
// --- Effect : Creates the palette from the DIBSection's color table. Assumes
// m_iColorTableSize has been set and the DIBsection m_hBitmap created
BOOL GWExtDIBSectionLite::CreatePalette()
{
m_Palette.DeleteObject();
if (!m_hBitmap)
return FALSE;
// Create a 256 color halftone palette if there is no color table in the DIBSection
if (m_iColorTableSize == 0)
return CreateHalftonePalette(m_Palette, 256);
// Get space for the color entries
RGBQUAD *pRGB = new RGBQUAD[m_iColorTableSize];
if (!pRGB)
return CreateHalftonePalette(m_Palette, m_iColorTableSize);
HDC hDC = ::GetDC(NULL);
if (!hDC)
{
delete [] pRGB;
return FALSE;
}
// Create a memory DC compatible with the current DC
CDC MemDC;
MemDC.CreateCompatibleDC(CDC::FromHandle(hDC));
if (!MemDC.GetSafeHdc())
{
delete [] pRGB;
::ReleaseDC(NULL, hDC);
return CreateHalftonePalette(m_Palette, m_iColorTableSize);
}
::ReleaseDC(NULL, hDC);
HBITMAP hOldBitmap = (HBITMAP) ::SelectObject(MemDC.GetSafeHdc(), m_hBitmap);
if (!hOldBitmap)
{
delete [] pRGB;
return CreateHalftonePalette(m_Palette, m_iColorTableSize);
}
// Get the colors used. WinCE does not support GetDIBColorTable so if you
// are using this on a CE device with palettes, then you need to replace
// the call with code that manually gets the color table from the m_DIBinfo structure.
#ifdef _WIN32_WCE
int nColors = ::CEGetDIBColorTable(MemDC.GetSafeHdc(), 0, m_iColorTableSize, pRGB);
#else
int nColors = ::GetDIBColorTable(MemDC.GetSafeHdc(), 0, m_iColorTableSize, pRGB);
#endif
// Clean up
::SelectObject(MemDC.GetSafeHdc(), hOldBitmap);
if (!nColors) // No colors retrieved => the bitmap in the DC is not a DIB section
{
delete [] pRGB;
return CreateHalftonePalette(m_Palette, m_iColorTableSize);
}
// Create and fill a LOGPALETTE structure with the colors used.
PALETTEINFO PaletteInfo;
PaletteInfo.palNumEntries = m_iColorTableSize;
for (int i = 0; i < nColors; i++)
{
PaletteInfo.palPalEntry[i].peRed = pRGB[i].rgbRed;
PaletteInfo.palPalEntry[i].peGreen = pRGB[i].rgbGreen;
PaletteInfo.palPalEntry[i].peBlue = pRGB[i].rgbBlue;
PaletteInfo.palPalEntry[i].peFlags = 0;
}
delete [] pRGB;
// Create Palette!
return m_Palette.CreatePalette(&PaletteInfo);
}
// --- In : pPalette - new palette to use
// --- Out :
// --- Returns : TRUE on success
// --- Effect : Sets the current palette used by the image from the supplied CPalette,
// and sets the color table in the DIBSection
BOOL GWExtDIBSectionLite::SetPalette(CPalette* pPalette)
{
m_Palette.DeleteObject();
if (!pPalette)
return FALSE;
UINT nColors = pPalette->GetEntryCount();
if (nColors <= 0 || nColors > 256)
return FALSE;
// Get palette entries
PALETTEINFO pi;
pi.palNumEntries = (WORD) pPalette->GetPaletteEntries(0, nColors, (LPPALETTEENTRY) pi);
return SetLogPalette(&pi);
}
// --- In : pLogPalette - new palette to use
// --- Out :
// --- Returns : TRUE on success
// --- Effect : Sets the current palette used by the image from the supplied LOGPALETTE
BOOL GWExtDIBSectionLite::SetLogPalette(LOGPALETTE* pLogPalette)
{
if (!pLogPalette)
{
CreatePalette();
return FALSE;
}
ASSERT(pLogPalette->palVersion == (WORD) 0x300);
UINT nColors = pLogPalette->palNumEntries;
if (nColors <= 0 || nColors > 256)
{
CreatePalette();
return FALSE;
}
// Create new palette
m_Palette.DeleteObject();
if (!m_Palette.CreatePalette(pLogPalette))
{
CreatePalette();
return FALSE;
}
if (m_iColorTableSize == 0)
return TRUE;
// Set the DIB colors
RGBQUAD RGBquads[256];
for (UINT i = 0; i < nColors; i++)
{
RGBquads[i].rgbRed = pLogPalette->palPalEntry[i].peRed;
RGBquads[i].rgbGreen = pLogPalette->palPalEntry[i].peGreen;
RGBquads[i].rgbBlue = pLogPalette->palPalEntry[i].peBlue;
RGBquads[i].rgbReserved = 0;
}
return FillDIBColorTable(nColors, RGBquads);
}
// --- In : nNumColors - number of colors to set
// pRGB - colors to fill
// --- Out :
// --- Returns : Returns TRUE on success
// --- Effect : Sets the colors used by the image. Only works if # colors <= 256
BOOL GWExtDIBSectionLite::FillDIBColorTable(UINT nNumColors, RGBQUAD *pRGB)
{
if (!pRGB || !nNumColors || !m_iColorTableSize || nNumColors > 256)
return FALSE;
// get the number of colors to return per BITMAPINFOHEADER docs
UINT nColors;
LPBITMAPINFOHEADER pBmih = GetBitmapInfoHeader();
if (pBmih->biClrUsed)
nColors = pBmih->biClrUsed;
else
nColors = 1 << (pBmih->biBitCount*pBmih->biPlanes);
// Initialize the loop variables
nColors = min(nNumColors, nColors);
LPRGBQUAD pColorTable = GetColorTable();
for (UINT iColor = 0; iColor < nColors; iColor++)
{
pColorTable[iColor].rgbReserved = 0;
pColorTable[iColor].rgbBlue = pRGB[iColor].rgbBlue;
pColorTable[iColor].rgbRed = pRGB[iColor].rgbRed;
pColorTable[iColor].rgbGreen = pRGB[iColor].rgbGreen;
}
return TRUE;
}
#endif // DIBSECTION_NO_PALETTE
// --- In : hdc - the Device Context in which the DIBSection is selected
// hBitmap - the bitmap whose solor entries are to be queried
// lpbi - a pointer to a BITMAPINFO structure that will have it's
// color table filled.
// --- Out :
// --- Returns : the number of colors placed in the color table
// --- Effect : This function is a replacement for GetDIBits, in that it retrieves
// (or synthesizes) the color table from the given bitmap, and stores
// the values in the BITMAPINFO structure supplied.
UINT GWExtDIBSectionLite::GetColorTableEntries(HDC hdc, HBITMAP hBitmap)
{
#ifndef _WIN32_WCE
// Call GetDIBits with NULL bits pointer to fill in the BITMAPINFOHEADER data
// Basically we are just getting the color table entries with a minimum of
// effort
if (!::GetDIBits(hdc, hBitmap, 0, GetHeight(), NULL, m_DIBinfo, m_iColorDataType))
{
TRACE0("Unable to GetDIBits\n");
AfxThrowResourceException();
}
// If the driver did not fill in the biSizeImage field, then compute it
// Each scan line of the image is aligned on a DWORD (32bit) boundary
if (m_DIBinfo.bmiHeader.biSizeImage == 0)
m_DIBinfo.bmiHeader.biSizeImage = BytesPerLine(m_DIBinfo.bmiHeader.biWidth,
m_DIBinfo.bmiHeader.biBitCount)
* m_DIBinfo.bmiHeader.biHeight;
return m_iColorTableSize;
#else
if (!m_iColorTableSize)
return 0;
// Fill the color table with the colors from the bitmap's color table
LPRGBQUAD pColorTable = GetColorTable();
// Get the color table from the HBITMAP and copy them over.
UINT nCount;
RGBQUAD* pRGB = new RGBQUAD[m_iColorTableSize];
if (pRGB)
{
HBITMAP hOldBitmap = (HBITMAP) SelectObject(hdc, hBitmap);
nCount = CEGetDIBColorTable(hdc, 0, m_iColorTableSize, pRGB);
SelectObject(hdc, hOldBitmap);
if (nCount)
{
// m_iColorTableSize = nCount;
memcpy(pColorTable, pRGB, nCount*sizeof(RGBQUAD));
}
}
delete [] pRGB;
// Didn't work - so synthesize one.
if (!nCount)
{
nCount = min( m_iColorTableSize, sizeof(ms_StdColors) / sizeof(ms_StdColors[0]) );
memcpy(pColorTable, ms_StdColors, nCount*sizeof(RGBQUAD));
}
return nCount;
#endif
}
#ifdef _WIN32_WCE
/**********************************************************************
This function is from the MS KB article "HOWTO: Get the Color Table of
a DIBSection in Windows CE".
PARAMETERS:
HDC - the Device Context in which the DIBSection is selected
UINT - the index of the first color table entry to retrieve
UINT - the number of color table entries to retrieve
RGBQUAD - a buffer large enough to hold the number of RGBQUAD
entries requested
RETURNS:
UINT - the number of colors placed in the buffer
***********************************************************************/
UINT CEGetDIBColorTable(HDC hdc, UINT uStartIndex, UINT cEntries,
RGBQUAD *pColors)
{
if (pColors == NULL)
return 0; // No place to put them, fail
// Get a description of the DIB Section
HBITMAP hDIBSection = (HBITMAP) GetCurrentObject( hdc, OBJ_BITMAP );
DIBSECTION ds;
DWORD dwSize = GetObject( hDIBSection, sizeof(DIBSECTION), &ds );
if (dwSize != sizeof(DIBSECTION))
return 0; // Must not be a DIBSection, fail
if (ds.dsBmih.biBitCount > 8)
return 0; // Not Palettized, fail
// get the number of colors to return per BITMAPINFOHEADER docs
UINT cColors;
if (ds.dsBmih.biClrUsed)
cColors = ds.dsBmih.biClrUsed;
else
cColors = 1 << (ds.dsBmih.biBitCount*ds.dsBmih.biPlanes);
// Create a mask for the palette index bits for 1, 2, 4, and 8 bpp
WORD wIndexMask = (0xFF << (8 - ds.dsBmih.biBitCount)) & 0x00FF;
// Get the pointer to the image bits
LPBYTE pBits = (LPBYTE) ds.dsBm.bmBits;
// Initialize the loop variables
cColors = min( cColors, cEntries );
BYTE OldPalIndex = *pBits;
UINT TestPixelY;
if (ds.dsBmih.biHeight > 0 )
// If button up DIB, pBits points to last row
TestPixelY = ds.dsBm.bmHeight-1;
else
// If top down DIB, pBits points to first row
TestPixelY = 0;
for (UINT iColor = uStartIndex; iColor < cColors; iColor++)
{
COLORREF rgbColor;
// Set the palette index for the test pixel,
// modifying only the bits for one pixel
*pBits = (iColor << (8 - ds.dsBmih.biBitCount)) |
(*pBits & ~wIndexMask);
// now get the resulting color
rgbColor = GetPixel( hdc, 0, TestPixelY );
pColors[iColor - uStartIndex].rgbReserved = 0;
pColors[iColor - uStartIndex].rgbBlue = GetBValue(rgbColor);
pColors[iColor - uStartIndex].rgbRed = GetRValue(rgbColor);
pColors[iColor - uStartIndex].rgbGreen = GetGValue(rgbColor);
}
// Restore the test pixel
*pBits = OldPalIndex;
return cColors;
}
#endif
// --- In : pDC - device context to use when calling CreateCompatibleDC
// bSelectPalette - if TRUE, the current palette will be preselected
// --- Out :
// --- Returns : A pointer to a memory DC
// --- Effect : Creates a memory DC and selects in the current bitmap so it can be
// modified using the GDI functions. Only one memDC can be created for
// a given GWExtDIBSectionLite object. If you have a memDC but wish to recreate it
// as compatible with a different DC, then call ReleaseMemoryDC first.
// If the memory DC has already been created then it will be recycled.
// Note that if using this in an environment where the color depth of
// the screen may change, then you will need to set "m_bReuseMemDC" to FALSE
CDC* GWExtDIBSectionLite::GetMemoryDC(CDC* pDC /*=NULL*/, BOOL bSelectPalette /*=TRUE*/)
{
#ifdef DIBSECTION_NO_MEMDC_REUSE
ReleaseMemoryDC(TRUE);
#else
if (!m_bReuseMemDC)
ReleaseMemoryDC(TRUE);
else if (m_MemDC.GetSafeHdc()) // Already created?
{
#ifndef _WIN32_WCE
// Flush the GDI batch queue
GdiFlush();
#endif
return &m_MemDC;
}
#endif // DIBSECTION_NO_MEMDC_REUSE
// Create a memory DC compatible with the given DC
if (!m_MemDC.CreateCompatibleDC(pDC))
return NULL;
// Select in the bitmap
m_hOldBitmap = (HBITMAP) ::SelectObject(m_MemDC.GetSafeHdc(), m_hBitmap);
#ifndef DIBSECTION_NO_PALETTE
// Select in the palette
if (bSelectPalette && UsesPalette(&m_MemDC))
{
// Palette should already have been created - but just in case...
if (!m_Palette.GetSafeHandle())
CreatePalette();
m_pOldPalette = m_MemDC.SelectPalette(&m_Palette, FALSE);
m_MemDC.RealizePalette();
}
else
m_pOldPalette = NULL;
#endif // DIBSECTION_NO_PALETTE
#ifndef _WIN32_WCE
// Flush the GDI batch queue
GdiFlush();
#endif // _WIN32_WCE
return &m_MemDC;
}
// --- In : bForceRelease - if TRUE, then the memory DC is forcibly released
// --- Out :
// --- Returns : TRUE on success
// --- Effect : Selects out the current bitmap and deletes the mem dc. If bForceRelease
// is FALSE, then the DC release will not actually occur. This is provided
// so you can have
//
// GetMemoryDC(...)
// ... do something
// ReleaseMemoryDC()
//
// bracketed calls. If m_bReuseMemDC is subsequently set to FALSE, then
// the same code fragment will still work.
BOOL GWExtDIBSectionLite::ReleaseMemoryDC(BOOL bForceRelease /*=FALSE*/)
{
bForceRelease;
if ( !m_MemDC.GetSafeHdc()
#ifndef DIBSECTION_NO_MEMDC_REUSE
|| (m_bReuseMemDC && !bForceRelease)
#endif // DIBSECTION_NO_MEMDC_REUSE
)
return TRUE; // Nothing to do
#ifndef _WIN32_WCE
// Flush the GDI batch queue
GdiFlush();
#endif // _WIN32_WCE
// Select out the current bitmap
if (m_hOldBitmap)
::SelectObject(m_MemDC.GetSafeHdc(), m_hOldBitmap);
m_hOldBitmap = NULL;
#ifndef DIBSECTION_NO_PALETTE
// Select out the current palette
if (m_pOldPalette)
m_MemDC.SelectPalette(m_pOldPalette, FALSE);
m_pOldPalette = NULL;
#endif // DIBSECTION_NO_PALETTE
// Delete the memory DC
return m_MemDC.DeleteDC();
}
#ifdef _DEBUG
// Makes trace windows a little bit more informative...
void GWExtDIBSectionLite::_ShowLastError()
{
LPVOID lpMsgBuf;
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf, 0, NULL);
TRACE1("Last error: %s\n", lpMsgBuf);
LocalFree(lpMsgBuf);
}
#else
void GWExtDIBSectionLite::_ShowLastError() {}
#endif