public static void *stbi__load_gif_main(StbiContext s, int **delays, int *x, int *y, int *z, int *comp,
int reqComp)
{
if (stbi__gif_test(s) != 0)
{
var layers = 0;
byte *u = null;
byte *out_ = null;
byte *two_back = null;
var g = new StbiGif();
var stride = 0;
if (delays != null)
{
*delays = null;
}
do
{
u = stbi__gif_load_next(s, g, comp, reqComp, two_back);
if (u != null)
{
*x = g.W;
*y = g.H;
++layers;
stride = g.W * g.H * 4;
if (out_ != null)
{
out_ = (byte *)CRuntime.Realloc(out_, (ulong)(layers * stride));
if (delays != null)
{
*delays = (int *)CRuntime.Realloc(*delays, (ulong)(sizeof(int) * layers));
}
}
else
{
out_ = (byte *)stbi__malloc((ulong)(layers * stride));
if (delays != null)
{
*delays = (int *)stbi__malloc((ulong)(layers * sizeof(int)));
}
}
CRuntime.Memcpy(out_ + (layers - 1) * stride, u, (ulong)stride);
if (layers >= 2)
{
two_back = out_ - 2 * stride;
}
if (delays != null)
{
(*delays)[layers - 1U] = g.Delay;
}
}
} while (u != null);
CRuntime.Free(g.Out);
CRuntime.Free(g.History);
CRuntime.Free(g.Background);
if (reqComp != 0 && reqComp != 4)
{
out_ = stbi__convert_format(out_, 4, reqComp, (uint)(layers * g.W), (uint)g.H);
}
*z = layers;
return(out_);
}
return((byte *)(ulong)(stbi__err("not GIF") != 0 ? (byte *)null : null));
}