HBITMAP BmpFilterLoadBitmap(BOOL *bIsTransparent, const wchar_t *ptszFilename)
{
FIBITMAP *dib = (FIBITMAP*)Image_Load(ptszFilename, IMGL_RETURNDIB);
if (dib == nullptr)
return nullptr;
FIBITMAP *dib32 = nullptr;
if (FreeImage_GetBPP(dib) != 32) {
dib32 = FreeImage_ConvertTo32Bits(dib);
FreeImage_Unload(dib);
}
else dib32 = dib;
if (dib32 == nullptr)
return nullptr;
if (FreeImage_IsTransparent(dib32))
if (bIsTransparent)
*bIsTransparent = TRUE;
if (FreeImage_GetWidth(dib32) > 128 || FreeImage_GetHeight(dib32) > 128) {
FIBITMAP *dib_new = FreeImage_MakeThumbnail(dib32, 128, FALSE);
FreeImage_Unload(dib32);
if (dib_new == nullptr)
return nullptr;
dib32 = dib_new;
}
HBITMAP bitmap = FreeImage_CreateHBITMAPFromDIB(dib32);
FreeImage_Unload(dib32);
FreeImage_CorrectBitmap32Alpha(bitmap, FALSE);
return bitmap;
}
/*
* Changes the handle to a grayscale image
*/
HBITMAP MakeGrayscale(HBITMAP hBitmap)
{
if (hBitmap) {
FIBITMAP *dib = FreeImage_CreateDIBFromHBITMAP(hBitmap);
if (dib) {
FIBITMAP *dib_new = FreeImage_ConvertToGreyscale(dib);
FreeImage_Unload(dib);
if (dib_new) {
DeleteObject(hBitmap);
HBITMAP hbm_new = FreeImage_CreateHBITMAPFromDIB(dib_new);
FreeImage_Unload(dib_new);
return hbm_new;
}
}
}
return hBitmap;
}
static INT_PTR serviceLoadFromMem(WPARAM wParam, LPARAM lParam)
{
IMGSRVC_MEMIO *mio = (IMGSRVC_MEMIO *)wParam;
if(mio->iLen == 0 || mio->pBuf == NULL)
return 0;
FIMEMORY *hmem = FreeImage_OpenMemory((BYTE *)mio->pBuf, mio->iLen);
FREE_IMAGE_FORMAT fif = (mio->fif != FIF_UNKNOWN) ? mio->fif : mio->fif = FreeImage_GetFileTypeFromMemory(hmem, 0);
FIBITMAP *dib = FreeImage_LoadFromMemory(fif, hmem, mio->flags);
FreeImage_CloseMemory(hmem);
if(dib == NULL || (lParam & IMGL_RETURNDIB))
return (INT_PTR)dib;
HBITMAP hbm = FreeImage_CreateHBITMAPFromDIB(dib);
FreeImage_Unload(dib);
return (INT_PTR)hbm;
}
static INT_PTR serviceLoad(WPARAM wParam, LPARAM lParam)
{
char *lpszFilename = (char *)wParam;
if(lpszFilename==NULL) return 0;
FREE_IMAGE_FORMAT fif = FIF_UNKNOWN;
if(lParam & IMGL_WCHAR)
fif = FreeImage_GetFileTypeU((wchar_t *)lpszFilename, 0);
else
fif = FreeImage_GetFileType(lpszFilename, 0);
if(fif == FIF_UNKNOWN) {
if(lParam & IMGL_WCHAR)
fif = FreeImage_GetFIFFromFilenameU((wchar_t *)lpszFilename);
else
fif = FreeImage_GetFIFFromFilename(lpszFilename);
}
// check that the plugin has reading capabilities ...
if ((fif != FIF_UNKNOWN) && FreeImage_FIFSupportsReading(fif)) {
// ok, let's load the file
FIBITMAP *dib;
if (lParam & IMGL_WCHAR)
dib = FreeImage_LoadU(fif, (wchar_t *)lpszFilename, 0);
else
dib = FreeImage_Load(fif, lpszFilename, 0);
if(dib == NULL || (lParam & IMGL_RETURNDIB))
return (INT_PTR)dib;
HBITMAP hbm = FreeImage_CreateHBITMAPFromDIB(dib);
FreeImage_Unload(dib);
FI_CorrectBitmap32Alpha(hbm, FALSE);
return ((INT_PTR)hbm);
}
return NULL;
}
static INT_PTR serviceBmpFilterResizeBitmap(WPARAM wParam,LPARAM lParam)
{
BITMAP bminfo;
int width, height;
int xOrig, yOrig, widthOrig, heightOrig;
ResizeBitmap *info = (ResizeBitmap *) wParam;
if (info == NULL || info->size != sizeof(ResizeBitmap)
|| info->hBmp == NULL
|| info->max_width < 0 || info->max_height < 0
|| (info->fit & ~RESIZEBITMAP_FLAG_DONT_GROW) < RESIZEBITMAP_STRETCH
|| (info->fit & ~RESIZEBITMAP_FLAG_DONT_GROW) > RESIZEBITMAP_MAKE_SQUARE)
return 0;
// Well, lets do it
// Calc final size
GetObject(info->hBmp, sizeof(bminfo), &bminfo);
width = info->max_width == 0 ? bminfo.bmWidth : info->max_width;
height = info->max_height == 0 ? bminfo.bmHeight : info->max_height;
xOrig = 0;
yOrig = 0;
widthOrig = bminfo.bmWidth;
heightOrig = bminfo.bmHeight;
if (widthOrig == 0 || heightOrig == 0)
return 0;
switch(info->fit & ~RESIZEBITMAP_FLAG_DONT_GROW)
{
case RESIZEBITMAP_STRETCH:
{
// Do nothing
break;
}
case RESIZEBITMAP_KEEP_PROPORTIONS:
{
if (height * widthOrig / heightOrig <= width)
{
if (info->fit & RESIZEBITMAP_FLAG_DONT_GROW)
height = min(height, bminfo.bmHeight);
width = height * widthOrig / heightOrig;
}
else
{
if (info->fit & RESIZEBITMAP_FLAG_DONT_GROW)
width = min(width, bminfo.bmWidth);
height = width * heightOrig / widthOrig;
}
break;
}
case RESIZEBITMAP_MAKE_SQUARE:
{
if (info->fit & RESIZEBITMAP_FLAG_DONT_GROW)
{
width = min(width, bminfo.bmWidth);
height = min(height, bminfo.bmHeight);
}
width = height = min(width, height);
// Do not break. Use crop calcs to make size
}
case RESIZEBITMAP_CROP:
{
if (heightOrig * width / height >= widthOrig)
{
heightOrig = widthOrig * height / width;
yOrig = (bminfo.bmHeight - heightOrig) / 2;
}
else
{
widthOrig = heightOrig * width / height;
xOrig = (bminfo.bmWidth - widthOrig) / 2;
}
break;
}
}
if ((width == bminfo.bmWidth && height == bminfo.bmHeight)
|| ((info->fit & RESIZEBITMAP_FLAG_DONT_GROW)
&& !(info->fit & RESIZEBITMAP_MAKE_SQUARE)
&& width > bminfo.bmWidth && height > bminfo.bmHeight))
{
// Do nothing
return (INT_PTR)info->hBmp;
}
else
{
FIBITMAP *dib = FreeImage_CreateDIBFromHBITMAP(info->hBmp);
if (dib == NULL)
return NULL;
FIBITMAP *dib_tmp;
if (xOrig > 0 || yOrig > 0)
dib_tmp = FreeImage_Copy(dib, xOrig, yOrig, xOrig + widthOrig, yOrig + heightOrig);
else
dib_tmp = dib;
if (dib_tmp == NULL)
{
FreeImage_Unload(dib);
return NULL;
}
FIBITMAP *dib_new = FreeImage_Rescale(dib_tmp, width, height, FILTER_CATMULLROM);
HBITMAP bitmap_new = FreeImage_CreateHBITMAPFromDIB(dib_new);
if (dib_new != dib_tmp)
FreeImage_Unload(dib_new);
if (dib_tmp != dib)
FreeImage_Unload(dib_tmp);
FreeImage_Unload(dib);
return (INT_PTR)bitmap_new;
}
}
