public static void ImgLoadImage(string filepathname, int flipVertical, out demoImage image)
{
UIImage imageClass = new UIImage(filepathname);
CGImage cgImage = imageClass.CGImage;
if (cgImage == null)
{
image = null;
return;
}
image = new demoImage();
image.width = imageClass.Size.Width;
image.height = imageClass.Size.Height;
image.rowByteSize = (int)image.width * 4;
image.data = new byte[(int)(image.height * image.rowByteSize)];
image.format = PixelFormat.Rgba;
image.type = PixelType.UnsignedByte;
CGContext context = new CGBitmapContext(image.data, (nint)image.width, (nint)image.height, 8,
image.rowByteSize, cgImage.ColorSpace, (CGImageAlphaInfo)(CGBitmapFlags.AlphaInfoMask &
CGBitmapFlags.NoneSkipLast));
context.SetBlendMode(CGBlendMode.Copy);
if (flipVertical != 0)
{
context.TranslateCTM(0f, image.height);
context.ScaleCTM(1f, -1f);
}
context.DrawImage(new CGRect(0, 0, image.width, image.height), cgImage);
if (image.data == null)
{
ImgDestroyImage(ref image);
}
}
internal static int BuildTexture(demoImage image)
{
int texName = 0;
// Create a texture object to apply to model
unsafe {
GL.GenTextures(1, &texName);
GL.BindTexture(TextureTarget.Texture2D, texName);
// Set up filter and wrap modes for this texture object
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (float)All.Nearest);
// Allocate and load image data into texture
GL.TexImage2D(TextureTarget.Texture2D, 0, (PixelInternalFormat)image.format,
(int)image.width, (int)image.height, 0,
image.format, image.type, Marshal.UnsafeAddrOfPinnedArrayElement(image.data, 0));
RenderUtils.CheckGLError();
}
return(texName);
}
public static void ImgDestroyImage(ref demoImage image)
{
image = null;
}
