Source code of Windows XP (NT5)
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177 lines
4.9 KiB

// this file should not be needed anymore as we now compile for versions of NT > 500
#include "shellprv.h"
#include <appmgmt.h>
#include <userenv.h>
#include <devguid.h>
#include <dbt.h>
LPTSTR GetEnvBlock(HANDLE hUserToken)
{
LPTSTR pszRet = NULL;
if (hUserToken)
CreateEnvironmentBlock(&pszRet, hUserToken, TRUE);
else
pszRet = (LPTSTR) GetEnvironmentStrings();
return pszRet;
}
void FreeEnvBlock(HANDLE hUserToken, LPTSTR pszEnv)
{
if (pszEnv)
{
if (hUserToken)
DestroyEnvironmentBlock(pszEnv);
else
FreeEnvironmentStrings(pszEnv);
}
}
STDAPI_(BOOL) GetAllUsersDirectory(LPTSTR pszPath)
{
DWORD cbData = MAX_PATH;
BOOL fRet = FALSE;
// This is delay loaded. It can fail.
__try
{
fRet = GetAllUsersProfileDirectoryW(pszPath, &cbData);
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
pszPath[0] = 0;
}
return fRet;
}
BOOL IsColorKey(RGBQUAD rgbPixel, COLORREF crKey)
{
// COLORREF is backwards to RGBQUAD
return InRange( rgbPixel.rgbBlue, ((crKey & 0xFF0000) >> 16) - 5, ((crKey & 0xFF0000) >> 16) + 5) &&
InRange( rgbPixel.rgbGreen, ((crKey & 0x00FF00) >> 8) - 5, ((crKey & 0x00FF00) >> 8) + 5) &&
InRange( rgbPixel.rgbRed, ((crKey & 0x0000FF) >> 0) - 5, ((crKey & 0x0000FF) >> 0) + 5);
}
typedef BOOL (* PFNUPDATELAYEREDWINDOW)
(HWND hwnd,
HDC hdcDest,
POINT *pptDst,
SIZE *psize,
HDC hdcSrc,
POINT *pptSrc,
COLORREF crKey,
BLENDFUNCTION *pblend,
DWORD dwFlags);
BOOL NT5_UpdateLayeredWindow(HWND hwnd, HDC hdcDest, POINT* pptDest, SIZE* psize,
HDC hdcSrc, POINT* pptSrc, COLORREF crKey, BLENDFUNCTION* pblend, DWORD dwFlags)
{
BOOL bRet = FALSE;
static PFNUPDATELAYEREDWINDOW pfn = NULL;
if (NULL == pfn)
{
HMODULE hmod = GetModuleHandle(TEXT("USER32"));
if (hmod)
pfn = (PFNUPDATELAYEREDWINDOW)GetProcAddress(hmod, "UpdateLayeredWindow");
}
if (pfn)
{
// The user implementation is poor and does not implement this functionality
BITMAPINFO bmi;
HDC hdcRGBA;
HBITMAP hbmRGBA;
VOID* pBits;
LONG i;
BLENDFUNCTION blend;
ULONG* pul;
POINT ptSrc;
hdcRGBA = NULL;
if ((dwFlags & (ULW_ALPHA | ULW_COLORKEY)) == (ULW_ALPHA | ULW_COLORKEY))
{
if (hdcSrc)
{
RtlZeroMemory(&bmi, sizeof(bmi));
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biWidth = psize->cx;
bmi.bmiHeader.biHeight = psize->cy;
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = 32;
bmi.bmiHeader.biCompression = BI_RGB;
hbmRGBA = CreateDIBSection(hdcDest,
&bmi,
DIB_RGB_COLORS,
&pBits,
NULL,
0);
if (!hbmRGBA)
return FALSE;
hdcRGBA = CreateCompatibleDC(hdcDest);
if (!hdcRGBA)
{
DeleteObject(hbmRGBA);
return FALSE;
}
SelectObject(hdcRGBA, hbmRGBA);
BitBlt(hdcRGBA, 0, 0, psize->cx, psize->cy,
hdcSrc, pptSrc->x, pptSrc->y, SRCCOPY);
pul = pBits;
for (i = psize->cx * psize->cy; i != 0; i--)
{
if (IsColorKey(*(RGBQUAD*)pul, crKey))
{
// Write a pre-multiplied value of 0:
*pul = 0;
}
else
{
// Where the bitmap is not the transparent color, change the
// alpha value to opaque:
((RGBQUAD*) pul)->rgbReserved = 0xff;
}
pul++;
}
// Change the parameters to account for the fact that we're now
// providing only a 32-bit per-pixel alpha source:
ptSrc.x = 0;
ptSrc.y = 0;
pptSrc = &ptSrc;
hdcSrc = hdcRGBA;
}
blend = *pblend;
blend.AlphaFormat = AC_SRC_ALPHA;
pblend = &blend;
dwFlags = ULW_ALPHA;
}
bRet = pfn(hwnd, hdcDest, pptDest, psize, hdcSrc, pptSrc, crKey, pblend, dwFlags);
if (hdcRGBA)
{
DeleteObject(hdcRGBA);
DeleteObject(hbmRGBA);
}
}
return bRet;
}