win32 - GDI Plus: How can i get the frame delay from image animation?

[Cambalinho]

i use GDIPLus for open image files.
but using the Image class, i can get the frames delay, but maybe i'm getting it on wrong way :(

PropertyItem ptFramedelay;
            img2.GetPropertyItem(PropertyTagFrameDelay, img2.GetPropertyItemSize(PropertyTagFrameDelay),&ptFramedelay);
            framedelay=ptFramedelay.length;

the compiler don't give me any error, only on execute mode, but by OS.
can anyone explain to me how i can get the frame delay?

[Cambalinho]

finally i fix the compiler errors:

int nSize = img2.GetPropertyItemSize(PropertyTagFrameDelay);

            // Allocate a buffer to receive the property item.
            PropertyItem *m_pPropertyItem = (PropertyItem*) malloc(nSize);

            img2.GetPropertyItem(PropertyTagFrameDelay, nSize, m_pPropertyItem);

            framedelay = (long)m_pPropertyItem->value;

(frame delay is int; img2 it's an Image object)
i get a very big number :(
can anyone advice me?

[Cambalinho]

i did a very big mistake: i need casting correctly from void* to int:

int nSize = img2.GetPropertyItemSize(PropertyTagFrameDelay);

            // Allocate a buffer to receive the property item.
            PropertyItem *m_pPropertyItem = (PropertyItem*) malloc(nSize);

            img2.GetPropertyItem(PropertyTagFrameDelay, nSize, m_pPropertyItem);

            framedelay =*((int *)m_pPropertyItem->value);

how casting from void* to any type:
*((typename*)voidpointervariablename)
but i get 100. the animation is to fast :(

[coder777]

Take a look at this again:

http://www.codeproject.com/Articles/1776/Adding-GIF-animation-using-GDI

long lPause = ((long*) m_pPropertyItem->value)[m_nFramePosition] * 10;

It is stored for each frame (hence the array) and it needs to be multiplied by 10.

[Cambalinho]

imagine that the delay it's the same between the frames and it's 100(like before), i will get 1000.... don't make sence :(
(i did the test with index 0(zero))

[coder777]

i will get 1000.... don't make sence

Why not?

[Cambalinho]

1000ms=1s
1 - it will be very slow between the frames;
2 - i don't belive that it's the real frame delay :(
see the image:
http://imgur.com/1wFGV3X
(the yellow smoking, with a gun animation)

[coder777]

This animation has certainly different delays between the frames. The shooting is faster than the smoking.