public static GLTexture2D CreateWhiteTexture(int width, int height)
{
GLTexture2D texture = new GLTexture2D();
texture.PixelInternalFormat = PixelInternalFormat.Rgba8;
texture.PixelFormat = PixelFormat.Rgba;
texture.PixelType = PixelType.UnsignedByte;
texture.Width = width; texture.Height = height;
texture.Target = TextureTarget.Texture2D;
texture.Bind();
byte[] buffer = new byte[width * height * 4];
for (int i = 0; i < width * height * 4; i++)
{
buffer[i] = 255;
}
GL.TexImage2D(TextureTarget.Texture2D, 0, texture.PixelInternalFormat,
texture.Width, texture.Height,
0, texture.PixelFormat, texture.PixelType, buffer);
texture.UpdateParameters();
texture.Unbind();
return(texture);
}
private GLTexture2D CreateColorAttachment(int width, int height, int numSamples)
{
GLTexture2D texture = GLTexture2DMultiSampled.CreateUncompressedTexture(width, height,
PixelInternalFormat, PixelFormat.Rgba, PixelType.Float);
// Don't use mipmaps for color attachments.
texture.MinFilter = TextureMinFilter.Linear;
texture.MagFilter = TextureMagFilter.Linear;
texture.UpdateParameters();
return(texture);
}
public static GLTexture2D CreateFloat32Texture(int width, int height, float[] buffer)
{
GLTexture2D texture = new GLTexture2D();
texture.PixelInternalFormat = PixelInternalFormat.R32f;
texture.PixelFormat = PixelFormat.Red;
texture.PixelType = PixelType.Float;
texture.Width = width; texture.Height = height;
texture.Target = TextureTarget.Texture2D;
texture.Bind();
GL.TexImage2D(TextureTarget.Texture2D, 0, texture.PixelInternalFormat,
texture.Width, texture.Height,
0, texture.PixelFormat, texture.PixelType, buffer);
texture.UpdateParameters();
texture.Unbind();
return(texture);
}
public static GLTexture2D CreateUncompressedTexture(int width, int height,
PixelInternalFormat format = PixelInternalFormat.Rgba8,
PixelFormat pixelFormat = PixelFormat.Rgba,
PixelType pixelType = PixelType.UnsignedByte)
{
GLTexture2D texture = new GLTexture2D();
texture.PixelInternalFormat = format;
texture.PixelFormat = pixelFormat;
texture.PixelType = pixelType;
texture.Width = width; texture.Height = height;
texture.Target = TextureTarget.Texture2D;
texture.Bind();
GL.TexImage2D(TextureTarget.Texture2D, 0, format,
texture.Width, texture.Height,
0, pixelFormat, pixelType, IntPtr.Zero);
texture.UpdateParameters();
texture.Unbind();
return(texture);
}