static gboolean
gtk_mng_view_init_libmng (GtkMngView * mng_view)
{
FUNCTION_ENTRY();
GtkWidget * widget;
g_return_val_if_fail (IS_GTK_MNG_VIEW (mng_view), FALSE);
if (mng_view->MNG_handle)
mng_cleanup (&mng_view->MNG_handle);
mng_view->MNG_handle = mng_initialize (mng_view,
mng_malloc_callback,
mng_free_callback,
MNG_NULL);
if (mng_view->MNG_handle == MNG_NULL) {
FUNCTION_EXIT();
return FALSE;
}
mng_set_storechunks(mng_view->MNG_handle, MNG_TRUE);
//mng_set_dfltimggamma(mng_view->MNG_handle, 5);
//mng_set_displaygamma(mng_view->MNG_handle, 4);
if (mng_setcb_openstream (mng_view->MNG_handle, mng_open_stream_callback) != MNG_NOERROR ||
mng_setcb_closestream (mng_view->MNG_handle, mng_close_stream_callback) != MNG_NOERROR ||
mng_setcb_readdata (mng_view->MNG_handle, mng_read_data_callback) != MNG_NOERROR ||
mng_setcb_processheader (mng_view->MNG_handle, mng_process_header_callback) != MNG_NOERROR ||
mng_setcb_processmend (mng_view->MNG_handle, mng_process_mend_callback) != MNG_NOERROR ||
mng_setcb_processterm (mng_view->MNG_handle, mng_process_term_callback) != MNG_NOERROR ||
mng_setcb_settimer (mng_view->MNG_handle, mng_set_timer_callback) != MNG_NOERROR ||
mng_setcb_gettickcount (mng_view->MNG_handle, mng_get_tickcount_callback) != MNG_NOERROR ||
mng_setcb_getcanvasline (mng_view->MNG_handle, mng_get_canvas_line_callback) != MNG_NOERROR ||
mng_setcb_getalphaline (mng_view->MNG_handle, mng_get_alpha_line_callback) != MNG_NOERROR ||
mng_setcb_refresh (mng_view->MNG_handle, mng_refresh_callback) != MNG_NOERROR)
{
mng_cleanup (&mng_view->MNG_handle);
FUNCTION_EXIT();
return FALSE;
}
//mng_set_suspensionmode(mng_view->MNG_handle, MNG_TRUE);
mng_set_canvasstyle (mng_view->MNG_handle, MNG_CANVAS_RGB8_A8);
widget = GTK_WIDGET (mng_view);
if (!GTK_WIDGET_REALIZED (widget))
gtk_widget_realize (widget);
mng_set_bgcolor (mng_view->MNG_handle,
widget->style->bg[GTK_STATE_NORMAL].red,
widget->style->bg[GTK_STATE_NORMAL].green,
widget->style->bg[GTK_STATE_NORMAL].blue);
FUNCTION_EXIT();
return TRUE;
}
static FIBITMAP * DLL_CALLCONV
Load(FreeImageIO *io, fi_handle handle, int page, int flags, void *data) {
mng_handle hmng = NULL;
if (handle != NULL) {
try {
// allocate our stream data structure
mngstuff *mymng = (mngstuff *)data;
// set up the mng decoder for our stream
hmng = mng_initialize(mymng, mymngalloc, mymngfree, MNG_NULL);
if (hmng == MNG_NULL) {
throw "could not initialize libmng";
}
// set the colorprofile, lcms uses this
mng_set_srgb(hmng, MNG_TRUE );
// set white as background color
WORD wRed, wGreen, wBlue;
wRed = wGreen = wBlue = (255 << 8) + 255;
mng_set_bgcolor(hmng, wRed, wGreen, wBlue);
// if PNG Background is available, use it
mng_set_usebkgd(hmng, MNG_TRUE );
// no need to store chunks
mng_set_storechunks(hmng, MNG_FALSE);
// no need to wait: straight reading
mng_set_suspensionmode(hmng, MNG_FALSE);
// set the callbacks
mng_setcb_errorproc(hmng, mymngerror);
mng_setcb_openstream(hmng, mymngopenstream);
mng_setcb_closestream(hmng, mymngclosestream);
mng_setcb_readdata(hmng, mymngreadstream);
mng_setcb_processheader(hmng, mymngprocessheader);
mng_setcb_getcanvasline(hmng, mymnggetcanvasline);
mng_setcb_refresh(hmng, mymngrefresh);
mng_setcb_gettickcount(hmng, mymnggetticks);
mng_setcb_settimer(hmng, mymngsettimer);
// read in the bitmap
mng_readdisplay(hmng);
// read all bitmaps
int retval = MNG_NOERROR;
mng_datap pData = (mng_datap)hmng;
while(pData->bReading) {
retval = mng_display_resume(hmng);
if((retval == MNG_NEEDTIMERWAIT) || (retval == MNG_FUNCTIONINVALID))
break;
}
// temp store the newly created bitmap
FIBITMAP *bitmap = mymng->bitmap;
// cleanup and return the temp stored bitmap
mng_cleanup(&hmng);
return bitmap;
} catch (const char *message) {
FIBITMAP *bitmap = ((mngstuff *)mng_get_userdata(hmng))->bitmap;
if(bitmap) {
FreeImage_Unload(bitmap);
}
mng_cleanup(&hmng);
FreeImage_OutputMessageProc(s_format_id, message);
}
}
return NULL;
}
