IImgCtx* vmsImage::LoadImage(LPCSTR pszFile)
{
IImgCtx* pImage = NULL;
HRESULT hr = CoCreateInstance (CLSID_IImgCtx, NULL, CLSCTX_ALL,
IID_IImgCtx, (void**)&pImage);
if (FAILED (hr))
return NULL;
char szPath [MY_MAX_PATH];
strcpy (szPath, "file://");
strcat (szPath, pszFile);
LPSTR psz = szPath;
while (*psz)
{
if (*psz == '\\')
*psz = '/';
psz++;
}
wchar_t wszPath [MY_MAX_PATH];
MultiByteToWideChar (CP_ACP, 0, szPath, lstrlen (szPath), wszPath, MY_MAX_PATH);
wszPath [lstrlen (szPath)] = 0;
hr = pImage->Load (wszPath, 0);
if (FAILED (hr))
{
pImage->Release ();
return NULL;
}
DWORD dwState;
do {
hr = pImage->GetStateInfo (&dwState, NULL, FALSE);
if (FAILED (hr))
{
pImage->Release ();
return NULL;
}
if (dwState & IMGLOAD_LOADING)
Sleep (10);
} while(IMGLOAD_LOADING & dwState);
if ((dwState & IMGLOAD_COMPLETE) == 0)
{
pImage->Release ();
return NULL;
}
return pImage;
}
static void
slide_NewImage(LPCTSTR imgPath, LPCTSTR caption, int duration)
{
#ifdef _UNICODE
LPCWSTR imgPathW = imgPath;
#else
WCHAR imgPathW[MAX_PATH];
MultiByteToWideChar(CP_ACP, 0, imgPath, -1, imgPathW, _countof(imgPathW));
#endif
IImgCtx *pImage = NULL;
SIZE imgSize = {0, 0};
if (SUCCEEDED(CoCreateInstance(CLSID_IImgCtx, NULL, CLSCTX_ALL, IID_IImgCtx, (void**)&pImage)))
{
if (SUCCEEDED(pImage->Load(imgPathW, 0)))
{
DWORD dwState;
while (SUCCEEDED(pImage->GetStateInfo(&dwState, NULL, true)) && (dwState & (IMGLOAD_COMPLETE|IMGLOAD_ERROR)) == 0)
Sleep(20);
pImage->GetStateInfo(&dwState, &imgSize, true);
}
if (imgSize.cx == 0 || imgSize.cy == 0) // error path or format (IMGLOAD_ERROR)
{
pImage->Release();
pImage = NULL;
}
}
if (pImage == NULL)
return;
// fit image
wDest = rDest.right - rDest.left;
hDest = rDest.bottom - rDest.top;
if (iFit == FIT_BOTH)
iFit = (wDest*imgSize.cy > imgSize.cx*hDest) ? FIT_HEIGHT : FIT_WIDTH;
if (iFit == FIT_HEIGHT)
wDest = (imgSize.cx * hDest) / imgSize.cy;
else if (iFit == FIT_WIDTH)
hDest = (imgSize.cy * wDest) / imgSize.cx;
// align image
if (iHAlign == HALIGN_CENTER) rDest.left = (rDest.left + rDest.right - wDest) / 2;
else if (iHAlign == HALIGN_RIGHT) rDest.left = rDest.right - wDest;
if (iVAlign == VALIGN_CENTER) rDest.top = (rDest.top + rDest.bottom - hDest) / 2;
else if (iVAlign == VALIGN_BOTTOM) rDest.top = rDest.bottom - hDest;
rDest.right = rDest.left + wDest;
rDest.bottom = rDest.top + hDest;
// create memory DC & Bitmap compatible with window's DC
HDC hWndDC = GetDC(g_hWnd);
g_hdcMem = CreateCompatibleDC(hWndDC);
g_hbmMem = CreateCompatibleBitmap(hWndDC, wDest, hDest);
ReleaseDC(g_hWnd, hWndDC);
SelectObject(g_hdcMem, g_hbmMem);
// paint image in memory DC
RECT bounds = { 0, 0, wDest, hDest };
pImage->Draw(g_hdcMem, &bounds);
pImage->Release(); // we don't need the image anymore
if (caption[0] != '\0')
{
LOGFONT lf;
GetObject((HFONT) ::SendMessage(g_hWnd, WM_GETFONT, 0, 0), sizeof(lf), &lf);
lf.lfHeight += lf.lfHeight/2;
HFONT hFont = CreateFontIndirect(&lf);
HGDIOBJ hOldFont = SelectObject(g_hdcMem, hFont);
SetTextColor(g_hdcMem, captionColor);
SetBkMode(g_hdcMem, TRANSPARENT);
SetTextAlign(g_hdcMem, TA_BOTTOM|TA_CENTER|TA_NOUPDATECP);
TextOut(g_hdcMem, wDest/2, hDest-10, caption, lstrlen(caption));
DeleteObject(SelectObject(g_hdcMem, hOldFont));
}
// replace windows procedure, start time and initiate first step
if (lpPrevWndFunc == NULL)
lpPrevWndFunc = (WNDPROC) SetWindowLongPtr(g_hWnd, GWL_WNDPROC, (long) slide_WndProc);
if (duration == 0)
{
g_step = _countof(SCA_Steps);
InvalidateRect(g_hWnd, NULL, FALSE); // no duration => force a WM_PAINT for immediate draw of picture
if (g_autoNext && g_autoDelay)
SetTimer(g_hWnd, 'XFBN', g_autoDelay, NULL);
}
else
{
g_step = 0;
slide_WndProc(g_hWnd, WM_TIMER, 'XFBN', 0); // first iteration right now
SetTimer(g_hWnd, 'XFBN', duration/_countof(SCA_Steps), NULL);
}
}