MFC下利用代码如何实现BMP图片或者Png图片如何转换成ICO格式

[qw_stone]

没有分数了，如题，但是暂时不希望使用CXImage，还有就是获取编码器那个方法也不能实现，跪求各位大神是否有别的方法

[Eleven]

ICONINFO/CreateIconIndirect()

[qw_stone]

#include <windows.h>
 
#include "resource.h"
 
struct TCursorOrIcon 
{ 
    WORD Reserved; 
    WORD wType; 
    WORD Count; 
}; 
 
struct TIconRec 
{ 
    BYTE Width; 
    BYTE Height; 
    WORD Colors; 
    WORD Reserved1; 
    WORD Reserved2; 
    long DIBSize; 
    long DIBOffset; 
}; 
 
static void InitBmpInfoHeader(HBITMAP Bitmap, BITMAPINFOHEADER& BI, int nBit) 
{ 
    int Bytes; 
    DIBSECTION DS; 
     
    DS.dsBmih.biSize = 0; 
    Bytes = GetObject(Bitmap, sizeof(DS), &DS); 
    if (Bytes>=sizeof(DS.dsBm)+sizeof(DS.dsBmih) && DS.dsBmih.biSize >=sizeof(DS.dsBmih)) 
        memcpy(&BI, &DS.dsBmih, sizeof( BITMAPINFOHEADER)); 
    else { 
        memset(&BI, 0, sizeof(BI)); 
        BI.biSize = sizeof(BI); 
        BI.biWidth = DS.dsBm.bmWidth; 
        BI.biHeight = DS.dsBm.bmHeight; 
        BI.biBitCount = DS.dsBm.bmPlanes * DS.dsBm.bmBitsPixel; 
    } 
    if (nBit!=0) BI.biBitCount = nBit; 
    if (BI.biBitCount <= 8) 
        BI.biClrUsed = 1<<BI.biBitCount; 
    BI.biPlanes = 1; 
    if (BI.biClrImportant > BI.biClrUsed) 
        BI.biClrImportant = BI.biClrUsed; 
    if (BI.biSizeImage == 0) 
        BI.biSizeImage = ((BI.biWidth*BI.biBitCount+31) / 32) * 4 * BI.biHeight; 
} 
 
static void GetDIBSizes(HBITMAP Bitmap,DWORD& InfoSize, DWORD& ImageSize, int nBit) 
{ 
    BITMAPINFOHEADER BI; 
     
    InitBmpInfoHeader(Bitmap, BI, nBit); 
    InfoSize = sizeof(BITMAPINFOHEADER); 
    if (BI.biBitCount > 8) { 
        if (BI.biCompression&BI_BITFIELDS) 
            InfoSize += 12; 
    } 
    else 
        InfoSize += sizeof(RGBQUAD) * (BI.biClrUsed!=0 ? BI.biClrUsed : (1 << BI.biBitCount)); 
    ImageSize = BI.biSizeImage; 
} 
 
static void GetDIB(HBITMAP Bitmap,BITMAPINFO* BmpInfo, void* Bits, int nBit) 
{ 
    HDC DC; 
     
    DC = CreateCompatibleDC(NULL); 
    InitBmpInfoHeader(Bitmap, BmpInfo->bmiHeader, nBit); 
    GetDIBits(DC, Bitmap, 0, BmpInfo->bmiHeader.biHeight, Bits, BmpInfo, DIB_RGB_COLORS); 
    DeleteDC(DC); 
} 
 
 
BOOL SaveIcon(HICON Icon, LPCSTR FileName, int nBit) 
{ 
    BOOL ret; 
    UINT nColor; 
    long Length; 
    void *MonoBits; 
    void *ColorBits; 
    DWORD dwWrite; 
    HANDLE hFile; 
    TIconRec List; 
    ICONINFO IconInfo; 
    TCursorOrIcon CI; 
    DWORD MonoInfoSize; 
    DWORD ColorInfoSize; 
    DWORD MonoBitsSize; 
    DWORD ColorBitsSize; 
    BITMAPINFO *MonoInfo; 
    BITMAPINFO *ColorInfo; 
     
    switch(nBit) { 
    case 0: 
    case 1: 
    case 4: 
    case 8: 
    case 16: 
    case 24: 
    case 32: break; 
//添加48 case 48：
    default: return FALSE; 
    } 
    if (Icon==NULL || !FileName) 
        return FALSE; 
     
    hFile = CreateFile(FileName,GENERIC_WRITE, FILE_SHARE_READ,0, CREATE_ALWAYS, 0, 0); 
    if (hFile==INVALID_HANDLE_VALUE) 
        return false; 
    memset(&CI, 0, sizeof(CI)); 
    memset(&List, 0, sizeof(List)); 
    GetIconInfo(Icon, &IconInfo); 
     
    GetDIBSizes(IconInfo.hbmMask,MonoInfoSize, MonoBitsSize, 1); 
    GetDIBSizes(IconInfo.hbmColor, ColorInfoSize, ColorBitsSize, nBit); 
    MonoInfo = (BITMAPINFO*)malloc(MonoInfoSize); 
    ColorInfo = (BITMAPINFO*)malloc(ColorInfoSize); 
    MonoBits = malloc(MonoBitsSize); 
    ColorBits = malloc(ColorBitsSize); 
    GetDIB(IconInfo.hbmMask, MonoInfo, MonoBits, 1); 
    GetDIB(IconInfo.hbmColor, ColorInfo, ColorBits, nBit); 
    CI.wType = 0x10001; 
    CI.Count = 1; 
    ret &= WriteFile(hFile, &CI, sizeof(CI), &dwWrite, NULL); 
    List.Width = ColorInfo->bmiHeader.biWidth; 
    List.Height = ColorInfo->bmiHeader.biHeight; 
    List.Colors = ColorInfo->bmiHeader.biPlanes * ColorInfo->bmiHeader.biBitCount; 
    List.DIBSize = ColorInfoSize + ColorBitsSize + MonoBitsSize; 
    List.DIBOffset = sizeof(CI) + sizeof(List); 
    ret &= WriteFile(hFile, &List, sizeof(List), &dwWrite, NULL); 
    ColorInfo->bmiHeader.biHeight *= 2; 
    ret &= WriteFile(hFile, ColorInfo, ColorInfoSize, &dwWrite, NULL); 
    ret &= WriteFile(hFile, ColorBits, ColorBitsSize, &dwWrite, NULL); 
    ret &= WriteFile(hFile, MonoBits, MonoBitsSize, &dwWrite, NULL); 
    free(ColorInfo); free(MonoInfo); 
    free(ColorBits); free(MonoBits); 
    DeleteObject(IconInfo.hbmColor); 
    DeleteObject(IconInfo.hbmMask); 
     
    CloseHandle(hFile); return ret; 
} 

我创建一个48*48的图标为什么不成功 提示创建的图标太大或者被损坏。

[qw_stone]

说错了，保存的ICO48*48是黑白色的，怎么会失真那？

[HTControl]

http://bbs.csdn.net/topics/391835060 暂时不希望使用CXImage? 你是想C自己一行一行实现吗？ 试试opencv ? 这个转换格式就一行

[赵4老师]

Image Magick