void LoadTextureFromPng()
{
using (UIImage img = UIImage.FromFile("NeHe.png"))
{
int width = img.CGImage.Width;
int height = img.CGImage.Height;
using (MonoTouch.CoreGraphics.CGColorSpace colorSpaceRef = MonoTouch.CoreGraphics.CGColorSpace.CreateDeviceRGB())
{
IntPtr imageData = System.Runtime.InteropServices.Marshal.AllocCoTaskMem(height * width * 4);
try
{
using (MonoTouch.CoreGraphics.CGBitmapContext context = new MonoTouch.CoreGraphics.CGBitmapContext(
imageData, width, height, 8, 4 * width, colorSpaceRef, MonoTouch.CoreGraphics.CGBitmapFlags.ByteOrder32Big |
MonoTouch.CoreGraphics.CGBitmapFlags.PremultipliedLast))
{
colorSpaceRef.Dispose();
context.ClearRect(new System.Drawing.RectangleF(0.0f, 0.0f, (float)width, (float)height));
context.TranslateCTM(0, 0);
context.DrawImage(new System.Drawing.RectangleF(0.0f, 0.0f, (float)width, (float)height), img.CGImage);
GL1.TexImage2D(All1.Texture2D, 0, (int)All1.Rgba, width, height, 0, All1.Rgba, All1.UnsignedByte, imageData);
}
}
finally
{
System.Runtime.InteropServices.Marshal.FreeCoTaskMem(imageData);
}
}
}
}
public override void Draw(System.Drawing.RectangleF rect)
{
base.Draw(rect);
using (MonoTouch.CoreGraphics.CGContext gfx = UIGraphics.GetCurrentContext())
{
using (MonoTouch.CoreGraphics.CGColorSpace rgb =
MonoTouch.CoreGraphics.CGColorSpace.CreateDeviceRGB())
{
MonoTouch.CoreGraphics.CGGradient gradient =
new MonoTouch.CoreGraphics.CGGradient(rgb,
new MonoTouch.CoreGraphics.CGColor[] {
startColor.CGColor,
endColor.CGColor
});
gfx.DrawLinearGradient(gradient,
new System.Drawing.PointF(rect.Left, rect.Top),
new System.Drawing.PointF(rect.Right, rect.Top),
MonoTouch.CoreGraphics.CGGradientDrawingOptions.DrawsBeforeStartLocation);
}
}
}
