/// <inheritdoc />
public override RenderTarget CreateRenderTarget(Vector2 size, bool smooth = false, TextureInternalFormat internalFormat = TextureInternalFormat.Rgba,
TexturePixelFormat pixelFormat = TexturePixelFormat.Rgba, bool attachStencil = false)
{
RenderTarget resultTarget = null;
InternalFormat intFormat = (InternalFormat)Enum.Parse(typeof(InternalFormat), internalFormat.ToString());
PixelFormat glFormat = (PixelFormat)Enum.Parse(typeof(PixelFormat), pixelFormat.ToString());
GLThread.ExecuteGLThread(() =>
{
// Create the FBO which rendering will be done to.
uint newFbo = Gl.GenFramebuffer();
Gl.BindFramebuffer(FramebufferTarget.Framebuffer, newFbo);
// Create the texture.
uint renderTexture = Gl.GenTexture();
Gl.BindTexture(TextureTarget.Texture2d, renderTexture);
Gl.TexImage2D(TextureTarget.Texture2d, 0, intFormat, (int)size.X, (int)size.Y, 0, glFormat,
PixelType.UnsignedByte, IntPtr.Zero);
Gl.TexParameter(TextureTarget.Texture2d, TextureParameterName.TextureMinFilter, smooth ? Gl.LINEAR : Gl.NEAREST);
Gl.TexParameter(TextureTarget.Texture2d, TextureParameterName.TextureMagFilter, smooth ? Gl.LINEAR : Gl.NEAREST);
// Attach the texture to the frame buffer.
Gl.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.Texture2d, renderTexture, 0);
// Attach color components.
int[] modes = { Gl.COLOR_ATTACHMENT0 };
Gl.DrawBuffers(modes);
// Create render buffer.
uint depthBuffer = Gl.GenRenderbuffer();
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, depthBuffer);
Gl.RenderbufferStorage(RenderbufferTarget.Renderbuffer, InternalFormat.Depth24Stencil8, (int)size.X,
(int)size.Y);
Gl.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, attachStencil ? FramebufferAttachment.DepthStencilAttachment : FramebufferAttachment.DepthAttachment, RenderbufferTarget.Renderbuffer, depthBuffer);
// Check status.
FramebufferStatus status = Gl.CheckFramebufferStatus(FramebufferTarget.Framebuffer);
if (status != FramebufferStatus.FramebufferComplete)
{
Engine.Log.Warning($"Framebuffer creation failed. Error code {status}.", MessageSource.GL);
}
// Create the texture object.
Texture targetTexture = new GLTexture(renderTexture, new Vector2(size.X, size.Y), null, $"FBO {newFbo} Texture");
// Create the render target object.
resultTarget = new GlRenderTarget(newFbo, size, targetTexture);
// Clear the target.
ClearScreen();
CheckError("creating scale fbo");
// Restore bindings and so on.
Engine.Renderer?.EnsureRenderTarget();
});
return(resultTarget);
}
/// <inheritdoc />
public override RenderTarget CreateMSAARenderTarget(int samples, Vector2 size, TextureInternalFormat internalFormat = TextureInternalFormat.Rgba, bool attachStencil = false)
{
RenderTarget resultTarget = null;
InternalFormat intFormat = (InternalFormat)Enum.Parse(typeof(InternalFormat), internalFormat.ToString());
GLThread.ExecuteGLThread(() =>
{
// Create the FBO.
uint newFbo = Gl.GenFramebuffer();
Gl.BindFramebuffer(FramebufferTarget.Framebuffer, newFbo);
// Create the texture.
uint renderTexture = Gl.GenTexture();
Gl.BindTexture(TextureTarget.Texture2dMultisample, renderTexture);
Gl.TexImage2DMultisample(TextureTarget.Texture2dMultisample, samples, intFormat, (int)size.X, (int)size.Y, true);
// Attach the texture to the frame buffer.
Gl.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.Texture2dMultisample, renderTexture, 0);
// Attach color components.
int[] modes = { Gl.COLOR_ATTACHMENT0 };
Gl.DrawBuffers(modes);
// Create render buffer.
uint depthBuffer = Gl.GenRenderbuffer();
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, depthBuffer);
Gl.RenderbufferStorageMultisample(RenderbufferTarget.Renderbuffer, samples, InternalFormat.Depth24Stencil8, (int)size.X, (int)size.Y);
Gl.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, attachStencil ? FramebufferAttachment.DepthStencilAttachment : FramebufferAttachment.DepthAttachment, RenderbufferTarget.Renderbuffer, depthBuffer);
// Check status.
FramebufferStatus status = Gl.CheckFramebufferStatus(FramebufferTarget.Framebuffer);
if (status != FramebufferStatus.FramebufferComplete)
{
Engine.Log.Warning($"MSAA Framebuffer creation failed. Error code {status}.", MessageSource.GL);
}
// Construct a texture object for it.
Texture targetTexture = new GLTexture(renderTexture, new Vector2(size.X, size.Y), null, $"MSAA{samples} FBO Texture");
// Create the render target object.
resultTarget = new GlRenderTarget(newFbo, size, targetTexture);
// Clear the target.
ClearScreen();
CheckError("creating msaa fbo");
// Restore bindings and so on.
Engine.Renderer?.EnsureRenderTarget();
});
return(resultTarget);
}
/// <inheritdoc />
public override void BindRenderTarget(RenderTarget t)
{
GLThread.ExecuteGLThread(() =>
{
// Check if restoring the window target.
if (t == null)
{
Gl.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
Gl.Viewport((int)Viewport.X, (int)Viewport.Y, (int)Viewport.Width, (int)Viewport.Height);
return;
}
GlRenderTarget target = (GlRenderTarget)t;
Gl.BindFramebuffer(FramebufferTarget.Framebuffer, target.Pointer);
Gl.Viewport((int)target.Viewport.X, (int)target.Viewport.Y, (int)target.Viewport.Width, (int)target.Viewport.Height);
});
}
