public OpenGLFramebuffer(int width, int height, GLint colourTextures, TextureFormat textureColourFormat, TextureFormat?textureDepthFormat = null)
{
if (colourTextures < 1)
{
throw new CKGLException("Must have at least 1 colour texture.");
}
if (colourTextures > GL.MaxColourAttachments || colourTextures > GL.MaxDrawBuffers)
{
throw new CKGLException("Too many colour textures.");
}
if (textureColourFormat.ToOpenGL().PixelFormat() == PixelFormat.Depth || textureColourFormat.ToOpenGL().PixelFormat() == PixelFormat.DepthStencil)
{
throw new CKGLException("textureColourFormat cannot be a depth(stencil) texture.");
}
if (textureDepthFormat.HasValue && !(textureDepthFormat.Value.ToOpenGL().PixelFormat() == PixelFormat.Depth || textureDepthFormat.Value.ToOpenGL().PixelFormat() == PixelFormat.DepthStencil))
{
throw new CKGLException("textureDepthFormat is not a depth(stencil) texture.");
}
this.width = width;
this.height = height;
camera2D.Width = width;
camera2D.Height = height;
id = GL.GenFramebuffer();
Bind();
Textures = new Texture[colourTextures];
DrawBuffer[] drawBuffers = new DrawBuffer[colourTextures];
for (int i = 0; i < colourTextures; i++)
{
Textures[i] = Texture.Create2D(Width, Height, textureColourFormat);
drawBuffers[i] = (DrawBuffer)((GLuint)DrawBuffer.Colour0 + i);
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, ((TextureAttachment)((uint)TextureAttachment.Colour0 + i)).ToOpenGL(), (Textures[i] as OpenGLTexture).TextureTarget, (Textures[i] as OpenGLTexture).ID, 0);
Textures[i].Unbind();
CheckStatus();
}
GL.DrawBuffers(colourTextures, drawBuffers);
CheckStatus();
if (textureDepthFormat.HasValue)
{
DepthStencilTexture = Texture.Create2D(Width, Height, textureDepthFormat.Value);
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, textureDepthFormat.Value.ToOpenGL().TextureAttachment(), (DepthStencilTexture as OpenGLTexture).TextureTarget, (DepthStencilTexture as OpenGLTexture).ID, 0);
DepthStencilTexture.Unbind();
CheckStatus();
}
}