public void AddTarget(PixelInternalFormat format, PixelType type)
{
Texture target = new Texture();
// Bind the texture
target.Bind();
// Give an empty image to OpenGL
GL.TexImage2D(TextureTarget.Texture2D, 0, format, gameWindow.Width, gameWindow.Height, 0, PixelFormat.Rgba, type, IntPtr.Zero);
// Poor filtering. Needed !
GL.TexParameter(TextureTarget.Texture2D,
TextureParameterName.TextureMinFilter,
(int)TextureMagFilter.Nearest);
GL.TexParameter(TextureTarget.Texture2D,
TextureParameterName.TextureMagFilter,
(int)TextureMagFilter.Nearest);
targets.Add(target);
}
void Initialize()
{
var textureQuality = new TextureQuality()
{
TextureWrapMode = TextureWrapMode.ClampToEdge,
Filtering = TextureFiltering.Nearest,
};
TextureTarget target;
int texID = GL.GenTexture();
var msaa = GL.GetInteger(GetPName.MaxSamples);
if (MSAA < 0)
MSAA = 0;
if (MSAA > msaa)
MSAA = msaa;
switch(MSAA)
{
case 1:
case 2:
case 4:
case 8:
case 16:
case 32:
case 64:
case 128:
case 256:
target = TextureTarget.Texture2DMultisample;
GL.BindTexture(target, texID);
GL.TexImage2DMultisample(TextureTargetMultisample.Texture2DMultisample, MSAA, PixelInternalFormat.Rgba, Width, Height, true);
break;
default:
target = TextureTarget.Texture2D;
GL.BindTexture(target, texID);
GL.TexImage2D(target, 0, PixelInternalFormat.Rgba, Width, Height, 0, PixelFormat.Rgba, PixelType.Byte, IntPtr.Zero);
break;
}
GL.BindTexture(target, 0);
Texture = new Texture(texID, Width, Height, target, PixelInternalFormat.Rgba);
Texture.Quality = textureQuality;
Texture.Bind();
Texture.UpdateQuality();
Texture.UnBind();
/*texture.Bind();
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.GenerateMipmap, 1); // automatic mipmap
texture.UnBind();*/
// create a renderbuffer object to store depth info
GL.GenRenderbuffers(1, out rboId);
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, rboId);
if(MSAA > 0)
{
GL.RenderbufferStorageMultisample(RenderbufferTarget.Renderbuffer, MSAA, RenderbufferStorage.DepthComponent32, Width, Height);
}
else
{
GL.RenderbufferStorage(RenderbufferTarget.Renderbuffer, RenderbufferStorage.DepthComponent32, Width, Height);
}
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, 0);
// create a framebuffer object
GL.GenFramebuffers(1, out fbo);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, fbo);
// attach the texture to FBO color attachment point
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, // 1. fbo target: GL_FRAMEBUFFER
FramebufferAttachment.ColorAttachment0, // 2. attachment point
Texture.TextureTarget, // 3. tex target: GL_TEXTURE_2D
Texture.ID, // 4. tex ID
0); // 5. mipmap level: 0(base)
// attach the renderbuffer to depth attachment point
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, // 1. fbo target: GL_FRAMEBUFFER
FramebufferAttachment.DepthAttachment, // 2. attachment point
RenderbufferTarget.Renderbuffer, // 3. rbo target: GL_RENDERBUFFER
rboId); // 4. rbo ID
// check FBO status
var status = GL.CheckFramebufferStatus(FramebufferTarget.Framebuffer);
if (status != FramebufferErrorCode.FramebufferComplete)
{
Complete = false;
Console.WriteLine("ERROR: Can not create framebuffer because " + status.ToString());
}
else
{
Complete = true;
}
// switch back to window-system-provided framebuffer
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
if (!Complete)
return;
var error = GL.GetError();
while(error != ErrorCode.NoError)
{
Debug.WriteLine("Error creating FBO: " + error.ToString());
error = GL.GetError();
}
batch = new VertexBatch();
batch.StartBatch(PrimitiveType.Triangles);
batch.Add(new Vector3(-1, -1, 0)); // Bottom left
batch.Add(new Vector3(1, -1, 0)); // Bottom right
batch.Add(new Vector3(-1, 1, 0)); // Top left
batch.Add(new Vector3(1, -1, 0)); // Bottom right
batch.Add(new Vector3(1, 1, 0)); // Top right
batch.Add(new Vector3(-1, 1, 0)); // Top left
batch.EndBatch();
}