protected int LoadTexture(Bitmap data, TextureWrapMode mode)
{
BitmapData lockedBitmap = data.LockBits(new Rectangle(Point.Empty, data.Size), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
byte[] buffer = new byte[lockedBitmap.Width * lockedBitmap.Height * 4];
for (int i = 0; i < buffer.Length; i += 4)
{
byte r, g, b, a;
a = Marshal.ReadByte(lockedBitmap.Scan0 + i);
r = Marshal.ReadByte(lockedBitmap.Scan0 + i + 1);
g = Marshal.ReadByte(lockedBitmap.Scan0 + i + 2);
b = Marshal.ReadByte(lockedBitmap.Scan0 + i + 3);
buffer[i] = r;
buffer[i + 1] = g;
buffer[i + 2] = b;
buffer[i + 3] = a;
}
data.UnlockBits(lockedBitmap);
CheckGlErrors("pre-texture-gen");
int textureId = Gl.GenTexture();
Gl.ActiveTexture(TextureUnit.Texture0);
Gl.BindTexture(TextureTarget.Texture2D, textureId);
Gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Linear);
Gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
Gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapS, (int)mode);
Gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureWrapT, (int)mode);
CheckGlErrors("pre-texture-upload");
Gl.TexImage2D(TextureTarget.Texture2D,
0,
PixelInternalFormat.Rgba8,
data.Width, data.Height,
0,
PixelFormat.Rgba,
PixelType.UnsignedByte,
buffer);
CheckGlErrors("post-texture-upload");
if (mode == TextureWrapMode.ClampToBorder)
{
float[] borderColor = new float[] { 0xff, 0x14, 0x93 };
Gl.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureBorderColor, borderColor);
}
CheckGlErrors("ok-texture-gen");
return(textureId);
}
