static mng_bool mngProcessHeaderFn(mng_handle mng, mng_uint32 width, mng_uint32 height)
{
mngstuff *mymng = (mngstuff *)mng_get_userdata(mng);
GFXFormat format;
mng_uint8 colorType = mng_get_colortype(mng);
mng_uint8 alphaDepth = mng_get_alphadepth(mng);
switch(colorType)
{
case MNG_COLORTYPE_GRAY:
case MNG_COLORTYPE_JPEGGRAY:
format = GFXFormatR8G8B8;
mng_set_canvasstyle(mng, MNG_CANVAS_RGB8);
break;
case MNG_COLORTYPE_INDEXED:
if(alphaDepth >= 1)
{
format = GFXFormatR8G8B8A8;
mng_set_canvasstyle(mng, MNG_CANVAS_RGBA8);
}
else
{
format = GFXFormatR8G8B8;
mng_set_canvasstyle(mng, MNG_CANVAS_RGB8);
}
case MNG_COLORTYPE_RGB:
case MNG_COLORTYPE_JPEGCOLOR:
if(alphaDepth >= 1)
{
format = GFXFormatR8G8B8A8;
mng_set_canvasstyle(mng, MNG_CANVAS_RGBA8);
}
else
{
format = GFXFormatR8G8B8;
mng_set_canvasstyle(mng, MNG_CANVAS_RGB8);
}
break;
case MNG_COLORTYPE_RGBA:
case MNG_COLORTYPE_JPEGCOLORA:
format = GFXFormatR8G8B8A8;
mng_set_canvasstyle(mng, MNG_CANVAS_RGBA8);
break;
default:
// This case should never get hit, however it resolves a compiler
// warning
format = GFXFormat_FIRST;
AssertISV( false, "Unknown color format in bitmap MNG Loading" );
}
mymng->image->allocateBitmap(width, height, false, format);
return MNG_TRUE;
}
static mng_bool
mng_process_header_callback (mng_handle mng_h,
mng_uint32 width,
mng_uint32 height)
{
FUNCTION_ENTRY();
GtkMngView * mng_view;
mng_view = GTK_MNG_VIEW (mng_get_userdata (mng_h));
mng_view->width = width;
mng_view->height = height;
g_width = width;
g_height = height;
g_free (mng_view->MNG_drawing_buffer);
mng_view->MNG_drawing_buffer = g_new0 (guchar, 3 * width * height);
g_free (mng_view->MNG_alpha_buffer);
mng_view->MNG_alpha_buffer = g_new0 (guchar, width * height);
printf("width %d height %d\n", width, height);
printf("mng_get_framecount %d\n", mng_get_framecount(mng_view->MNG_handle));
printf("mng_get_layercount %d\n", mng_get_layercount(mng_view->MNG_handle));
printf("mng_get_playtime %d\n", mng_get_playtime(mng_view->MNG_handle));
printf("mng_get_ticks %d\n", mng_get_ticks(mng_view->MNG_handle));
printf("mng_get_colortype %d\n", mng_get_colortype(mng_view->MNG_handle));
printf("mng_get_interlace %d\n", mng_get_interlace(mng_view->MNG_handle));
printf("mng_get_viewgamma %f\n", mng_get_viewgamma(mng_view->MNG_handle));
printf("mng_get_displaygamma %f\n", mng_get_displaygamma(mng_view->MNG_handle));
printf("mng_get_dfltimggamma %f\n", mng_get_dfltimggamma(mng_view->MNG_handle));
printf("mng_get_viewgammaint %d\n", mng_get_viewgammaint(mng_view->MNG_handle));
printf("mng_get_displaygammaint %d\n", mng_get_displaygammaint(mng_view->MNG_handle));
printf("mng_get_dfltimggammaint %d\n", mng_get_dfltimggammaint(mng_view->MNG_handle));
gtk_widget_queue_resize (GTK_WIDGET (mng_view));
FUNCTION_EXIT();
return MNG_TRUE;
}
static bool sReadMNG(Stream &stream, GBitmap *bitmap)
{
PROFILE_SCOPE(sReadMNG);
mngstuff mnginfo;
dMemset(&mnginfo, 0, sizeof(mngstuff));
mng_handle mng = mng_initialize(&mnginfo, mngMallocFn, mngFreeFn, MNG_NULL);
if(mng == NULL)
return false;
// setup the callbacks
mng_setcb_errorproc(mng, mngFatalErrorFn);
mng_setcb_openstream(mng, mngOpenDataFn);
mng_setcb_closestream(mng, mngCloseDataFn);
mng_setcb_readdata(mng, mngReadDataFn);
mng_setcb_processheader(mng, mngProcessHeaderFn);
mng_setcb_getcanvasline(mng, mngCanvasLineFn);
mng_setcb_refresh(mng, mngRefreshFn);
mng_setcb_gettickcount(mng, mngGetTicksFn);
mng_setcb_settimer(mng, mngSetTimerFn);
mnginfo.image = bitmap;
mnginfo.stream = &stream;
mng_read(mng);
mng_display(mng);
// hacks :(
// libmng doesn't support returning data in gray/gray alpha format,
// so we grab as RGB/RGBA and just cut off the g and b
mng_uint8 colorType = mng_get_colortype(mng);
switch(colorType)
{
case MNG_COLORTYPE_GRAY:
case MNG_COLORTYPE_JPEGGRAY:
{
GBitmap temp(*bitmap);
bitmap->deleteImage();
bitmap->allocateBitmap(temp.getWidth(), temp.getHeight(), false, GFXFormatA8);
// force getColor to read in in the same color value for each channel
// since the gray colortype has the real alpha in the first channel
temp.setFormat( GFXFormatA8 );
ColorI color;
for(U32 row = 0; row < bitmap->getHeight(); row++)
{
for(U32 col = 0; col < bitmap->getWidth(); col++)
{
temp.getColor(col, row, color);
bitmap->setColor(col, row, color);
}
}
}
break;
}
mng_cleanup(&mng);
// Check this bitmap for transparency
bitmap->checkForTransparency();
return true;
}
