作为更大项目的一部分,我试图通过首先将该图标绘制到HBITMAP,然后将其转换回HICON,从现有的HICON创建HICON。 (这将允许我修改图标,例如,通过在其上绘制文字。)
不幸的是,该图标显示为黑色方块。这是我的代码:
bool createIcon()
{
bool ret = false;
// get context of window
HDC context = GetDC(window_);
if (context != NULL)
{
// create a buffer context
HDC buffer = CreateCompatibleDC(context);
if (buffer != NULL)
{
PatBlt(buffer, 0, 0, iconSize_, iconSize_, WHITENESS);
// create a bitmap for our use
HBITMAP bitmap = CreateCompatibleBitmap(context, iconSize_, iconSize_);
if (bitmap != NULL)
{
HBITMAP oldBitmap;
// select the bitmap with the buffer
oldBitmap = reinterpret_cast<HBITMAP>(SelectObject(buffer, bitmap));
if (oldBitmap != NULL)
{
// draw the icon
if (DrawIcon(buffer, 0, 0, icon_))
{
if (icon_ != NULL)
DestroyIcon(icon_);
ImageList_RemoveAll(imageList_);
if (ImageList_Add(imageList_, bitmap, NULL) != -1)
{
icon_ = ImageList_GetIcon(imageList_, 0, ILD_NORMAL);
if (icon_ != NULL)
ret = true;
}
}
SelectObject(buffer, oldBitmap);
}
DeleteObject(bitmap);
}
DeleteDC(buffer);
}
DeleteDC(context);
}
return ret;
}
有什么想法吗?
答案 0 :(得分:1)
也许你想检查位图本身是黑色的,还是好的,只有图标是黑色的。根据我的经验(我对此没有合理的解释),问题出在CreateCompatibleBitmap
左右,我希望位图本身已经是黑色的。请尝试使用CreateDIBSection
。这曾经对我有用:
//HBITMAP hBitmap = CreateCompatibleBitmap(hDc, ResourceIconColorBitmap.bmWidth, ResourceIconColorBitmap.bmHeight);
BITMAPINFO BitmapInformation;
ZeroMemory(&BitmapInformation, sizeof BitmapInformation);
BitmapInformation.bmiHeader.biSize = sizeof BitmapInformation.bmiHeader;
BitmapInformation.bmiHeader.biWidth = ResourceIconColorBitmap.bmWidth;
BitmapInformation.bmiHeader.biHeight = ResourceIconColorBitmap.bmHeight;
BitmapInformation.bmiHeader.biPlanes = 1;
BitmapInformation.bmiHeader.biBitCount = 24;
VOID* pvBits;
HBITMAP hBitmap = CreateDIBSection(hDc, &BitmapInformation, DIB_RGB_COLORS, &pvBits, NULL, 0);
答案 1 :(得分:0)
ICONINFO nfo;
GetIconInfo(icon_, &nfo);
MyDrawSomethingOnIcon(nfo.hbmColor);
HICON new_icon = CreateIconIndirect(&nfo);
您需要做的就是实施MyDrawSomethingOnIcon
。当然,当它们不再使用时,您必须释放所有使用过的图标和位图。 MSDN将帮助您处理=)