public void AttachColorAttachment(int width, int height)
{
// For now
TextureID = Gl.GenTexture();
Gl.BindTexture(TextureTarget.Texture2d, TextureID);
Gl.TexImage2D(TextureTarget.Texture2d, 0, InternalFormat.Rgb, width, height, 0,
PixelFormat.Rgb, PixelType.UnsignedByte, IntPtr.Zero);
Gl.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureMinFilter, Gl.LINEAR);
Gl.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureMagFilter, Gl.LINEAR);
Bind();
FramebufferAttachment attachment = (FramebufferAttachment)(colorAttachmentsCounter +
(int)FramebufferAttachment.ColorAttachment0);
Gl.FramebufferTexture2D(FramebufferTarget.Framebuffer, attachment, TextureTarget.Texture2d, TextureID, 0);
Gl.DrawBuffers(new int[] { (int)attachment });
uint rbo = Gl.GenRenderbuffer();
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, rbo);
Gl.RenderbufferStorage(RenderbufferTarget.Renderbuffer, InternalFormat.Depth24Stencil8, width, height);
Gl.FramebufferRenderbuffer(FramebufferTarget.Framebuffer,
FramebufferAttachment.DepthStencilAttachment, RenderbufferTarget.Renderbuffer, rbo);
if (Gl.CheckFramebufferStatus(FramebufferTarget.Framebuffer) != FramebufferStatus.FramebufferComplete)
{
System.Diagnostics.Debug.WriteLine("ERROR::FRAMEBUFFER: Framebuffer is not complete!");
}
Unbind();
}
/// <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);
}
/// <summary>
/// Allocate this RenderBuffer.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for allocation.
/// </param>
/// <param name="w">
/// A <see cref="Int32"/> that specify the width of the renderbuffer.
/// </param>
/// <param name="h">
/// A <see cref="Int32"/> that specify the height of the renderbuffer.
/// </param>
public void Allocate(GraphicsContext ctx, uint w, uint h)
{
// Allocate buffer
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, ObjectName);
// Define buffer storage
Gl.RenderbufferStorage(RenderbufferTarget.Renderbuffer, _InternalFormat.GetGlInternalFormat(), (int)w, (int)h);
}
private static void RenderOsdFramebuffer(DeviceContext deviceContext)
{
IntPtr glContext = IntPtr.Zero;
uint framebuffer = 0;
uint renderbuffer = 0;
try {
// Create context and make current on this thread
if ((glContext = deviceContext.CreateContext(IntPtr.Zero)) == IntPtr.Zero)
{
throw new System.ComponentModel.Win32Exception(System.Runtime.InteropServices.Marshal.GetLastWin32Error()); // XXX
}
deviceContext.MakeCurrent(glContext);
// Create framebuffer resources
int w = Math.Min(800, Gl.CurrentLimits.MaxRenderbufferSize);
int h = Math.Min(600, Gl.CurrentLimits.MaxRenderbufferSize);
renderbuffer = Gl.GenRenderbuffer();
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, renderbuffer);
Gl.RenderbufferStorage(RenderbufferTarget.Renderbuffer, InternalFormat.Rgb8, w, h);
framebuffer = Gl.GenFramebuffer();
Gl.BindFramebuffer(FramebufferTarget.ReadFramebuffer, framebuffer);
Gl.BindFramebuffer(FramebufferTarget.Framebuffer, framebuffer);
Gl.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, RenderbufferTarget.Renderbuffer, renderbuffer);
FramebufferStatus framebufferStatus = Gl.CheckFramebufferStatus(FramebufferTarget.Framebuffer);
if (framebufferStatus != FramebufferStatus.FramebufferComplete)
{
throw new InvalidOperationException("framebuffer not complete");
}
Gl.DrawBuffers(Gl.COLOR_ATTACHMENT0);
RenderOsd(w, h);
Gl.ReadBuffer(ReadBufferMode.ColorAttachment0);
SnapshotOsd(w, h);
} finally {
if (renderbuffer != 0)
{
Gl.DeleteRenderbuffers(renderbuffer);
}
if (framebuffer != 0)
{
Gl.DeleteFramebuffers(framebuffer);
}
if (glContext != IntPtr.Zero)
{
deviceContext.DeleteContext(glContext);
}
}
}
/// <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);
}
/// <summary>
/// Actually create this GraphicsResource resources.
/// </summary>
/// <param name="ctx">
/// A <see cref="GraphicsContext"/> used for allocating resources.
/// </param>
protected override void CreateObject(GraphicsContext ctx)
{
int currentBinding;
Gl.Get(Gl.RENDERBUFFER_BINDING, out currentBinding);
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, ObjectName);
// Define buffer storage
Gl.RenderbufferStorage(RenderbufferTarget.Renderbuffer, _InternalFormat.GetGlInternalFormat(), (int)_Width, (int)_Height);
// Restore previous RenderBuffer binding
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, (uint)currentBinding);
}
private uint CreateDepthBufferAttachment(int width, int height)
{
uint depthBuffer = Gl.GenRenderbuffer();
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, depthBuffer);
Gl.RenderbufferStorage(RenderbufferTarget.Renderbuffer, InternalFormat.DepthComponent, width, height);
Gl.FramebufferRenderbuffer(FramebufferTarget.Framebuffer
, FramebufferAttachment.DepthAttachment
, RenderbufferTarget.Renderbuffer
, depthBuffer);
return(depthBuffer);
}
public override void Upload(Vector2 size, byte[] data, PixelFormat?pixelFormat = null, InternalFormat?internalFormat = null, PixelType?pixelType = null)
{
if (RenderBufferPtr != 0)
{
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, RenderBufferPtr);
Gl.RenderbufferStorage(RenderbufferTarget.Renderbuffer, InternalFormat, (int)size.X, (int)size.Y);
}
if (Pointer == 0)
{
return;
}
base.Upload(size, data, pixelFormat, internalFormat, pixelType);
}
private static void RenderOsdFramebuffer(DeviceContext deviceContext)
{
IntPtr glContext = IntPtr.Zero;
uint framebuffer = 0;
uint renderbuffer = 0;
try {
// Create context and make current on this thread
if ((glContext = deviceContext.CreateContext(IntPtr.Zero)) == IntPtr.Zero)
throw new System.ComponentModel.Win32Exception(System.Runtime.InteropServices.Marshal.GetLastWin32Error()); // XXX
deviceContext.MakeCurrent(glContext);
// Create framebuffer resources
int w = Math.Min(800, Gl.CurrentLimits.MaxRenderBufferSize);
int h = Math.Min(600, Gl.CurrentLimits.MaxRenderBufferSize);
renderbuffer = Gl.GenRenderbuffer();
Gl.BindRenderbuffer(Gl.RENDERBUFFER, renderbuffer);
Gl.RenderbufferStorage(Gl.RENDERBUFFER, Gl.RGB8, w, h);
framebuffer = Gl.GenFramebuffer();
Gl.BindFramebuffer(Gl.READ_FRAMEBUFFER, framebuffer);
Gl.BindFramebuffer(Gl.FRAMEBUFFER, framebuffer);
Gl.FramebufferRenderbuffer(Gl.FRAMEBUFFER, Gl.COLOR_ATTACHMENT0, Gl.RENDERBUFFER, renderbuffer);
int framebufferStatus = Gl.CheckFramebufferStatus(Gl.FRAMEBUFFER);
if (framebufferStatus != Gl.FRAMEBUFFER_COMPLETE)
throw new InvalidOperationException("framebuffer not complete");
Gl.DrawBuffers(Gl.COLOR_ATTACHMENT0);
RenderOsd(w, h);
Gl.ReadBuffer(ReadBufferMode.ColorAttachment0);
SnapshotOsd(w, h);
} finally {
if (renderbuffer != 0)
Gl.DeleteRenderbuffers(renderbuffer);
if (framebuffer != 0)
Gl.DeleteFramebuffers(framebuffer);
if (glContext != IntPtr.Zero)
deviceContext.DeleteContext(glContext);
}
}
public Framebuffer(Vector2I size) :
base(Gl.GenFramebuffer(), buffer => Gl.BindFramebuffer(FramebufferTarget.Framebuffer, buffer), Gl.DeleteFramebuffers)
{
Gl.BindFramebuffer(FramebufferTarget.Framebuffer, Handle);
//Color texture
uint colorTexture = Gl.GenTexture();
Gl.BindTexture(TextureTarget.Texture2d, colorTexture);
Gl.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureMinFilter, Gl.LINEAR);
Gl.TexParameteri(TextureTarget.Texture2d, TextureParameterName.TextureMagFilter, Gl.LINEAR);
Gl.TexImage2D(TextureTarget.Texture2d, 0, InternalFormat.Rgba, size.X, size.Y, 0, PixelFormat.Rgba, PixelType.UnsignedByte, IntPtr.Zero);
Gl.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.Texture2d, colorTexture, 0);
Texture = new Texture(colorTexture, size);
//Depth render buffer
uint depth = Gl.GenRenderbuffer();
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, depth);
Gl.RenderbufferStorage(RenderbufferTarget.Renderbuffer, InternalFormat.DepthComponent, size.X, size.Y);
Gl.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, RenderbufferTarget.Renderbuffer, depth);
//Set OpenGL state
Gl.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.OneMinusSrcAlpha);
Gl.Enable(EnableCap.Blend);
Gl.Enable(EnableCap.Multisample);
Gl.Enable(EnableCap.DepthTest);
if (Gl.CheckFramebufferStatus(FramebufferTarget.Framebuffer) != FramebufferStatus.FramebufferComplete)
{
throw new Exception("Framebuffer failed to initialize.");
}
Gl.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
}
private static uint CreatePrefilteredEnvironmentMap(Shader shader, Action preRender)
{
var cube = new Cube();
var captureFbo = Gl.GenFramebuffer();
Gl.BindFramebuffer(FramebufferTarget.Framebuffer, captureFbo);
var captureRbo = Gl.GenRenderbuffer();
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, captureRbo);
Gl.RenderbufferStorage(RenderbufferTarget.Renderbuffer, InternalFormat.DepthComponent24, 128, 128);
Gl.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, RenderbufferTarget.Renderbuffer, captureRbo);
var prefilterMap = Gl.GenTexture();
Gl.BindTexture(TextureTarget.TextureCubeMap, prefilterMap);
for (int i = 0; i < 6; ++i)
{
Gl.TexImage2D(TextureTarget.TextureCubeMapPositiveX + i, 0, InternalFormat.Rgb16f, 128, 128, 0, PixelFormat.Rgb, PixelType.Float, IntPtr.Zero);
}
Gl.TexParameter(TextureTarget.TextureCubeMap, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.LinearMipmapLinear);
Gl.TexParameter(TextureTarget.TextureCubeMap, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
Gl.TexParameter(TextureTarget.TextureCubeMap, TextureParameterName.TextureWrapS, (int)TextureWrapMode.ClampToEdge);
Gl.TexParameter(TextureTarget.TextureCubeMap, TextureParameterName.TextureWrapT, (int)TextureWrapMode.ClampToEdge);
Gl.TexParameter(TextureTarget.TextureCubeMap, TextureParameterName.TextureWrapR, (int)TextureWrapMode.ClampToEdge);
Gl.GenerateMipmap(TextureTarget.TextureCubeMap);
var projMatrix = Matrix4x4f.Perspective(90f, 1.0f, 0.1f, 10.0f);
var viewMatrices = new Matrix4x4f[]
{
Matrix4x4f.LookAt(new Vertex3f(0f, 0f, 0f), new Vertex3f(1f, 0f, 0f), new Vertex3f(0f, -1f, 0f)),
Matrix4x4f.LookAt(new Vertex3f(0f, 0f, 0f), new Vertex3f(-1f, 0f, 0f), new Vertex3f(0f, -1f, 0f)),
Matrix4x4f.LookAt(new Vertex3f(0f, 0f, 0f), new Vertex3f(0f, 1f, 0f), new Vertex3f(0f, 0f, 1f)),
Matrix4x4f.LookAt(new Vertex3f(0f, 0f, 0f), new Vertex3f(0f, -1f, 0f), new Vertex3f(0f, 0f, -1f)),
Matrix4x4f.LookAt(new Vertex3f(0f, 0f, 0f), new Vertex3f(0f, 0f, 1f), new Vertex3f(0f, -1f, 0f)),
Matrix4x4f.LookAt(new Vertex3f(0f, 0f, 0f), new Vertex3f(0f, 0f, -1f), new Vertex3f(0f, -1f, 0f)),
};
shader.Use();
preRender.Invoke();
shader.SetMatrix("projectionMatrix", projMatrix);
Gl.BindFramebuffer(FramebufferTarget.Framebuffer, captureFbo);
int mipLevels = 5;
for (int mips = 0; mips < mipLevels; ++mips)
{
int mipSize = (int)(128 * (float)Math.Pow(0.5, mips));
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, captureRbo);
Gl.RenderbufferStorage(RenderbufferTarget.Renderbuffer, InternalFormat.DepthComponent24, mipSize, mipSize);
Gl.Viewport(0, 0, mipSize, mipSize);
float roughness = mips / (float)(mipLevels - 1);
shader.SetFloat("roughness", roughness);
for (int i = 0; i < 6; ++i)
{
shader.SetMatrix("viewMatrix", viewMatrices[i]);
Gl.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.TextureCubeMapPositiveX + i, prefilterMap, mips);
Gl.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
cube.Draw();
}
}
Gl.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
return(prefilterMap);
}
public ScreenController(IntPtr window)
{
this.window = window;
var glcontext = SDL.SDL_GL_CreateContext(window);
SDL.SDL_GL_SetSwapInterval(1);
shader = new ShaderProgram(
File.ReadAllText(Assets.LoadPath("outputvert.glsl")),
File.ReadAllText(Assets.LoadPath("outputfrag.glsl"))
);
framebuffer = Gl.GenFramebuffer();
Gl.BindFramebuffer(FramebufferTarget.Framebuffer, framebuffer);
texture = Gl.GenTexture();
Gl.UseProgram(shader);
Gl.BindTexture(TextureTarget.Texture2D, texture);
Gl.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgb, screenWidth, screenHeight, 0, PixelFormat.Rgb, PixelType.UnsignedByte, IntPtr.Zero);
Gl.TexParameteri(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, TextureParameter.Nearest);
Gl.TexParameteri(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, TextureParameter.Nearest);
var renderBuffer = Gl.GenRenderbuffer();
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, renderBuffer);
Gl.RenderbufferStorage(RenderbufferTarget.Renderbuffer, RenderbufferStorage.DepthComponent16, screenWidth, screenHeight);
Gl.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, RenderbufferTarget.Renderbuffer, renderBuffer);
Gl.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.Texture2D, texture, 0);
Gl.DrawBuffer(DrawBufferMode.ColorAttachment0);
var error = Gl.CheckFramebufferStatus(FramebufferTarget.Framebuffer);
switch (error)
{
case FramebufferErrorCode.FramebufferComplete:
break;
default:
Console.WriteLine($"fbo error: {error}");
break;
}
vertices = new VBO <Vector3>(
new Vector3[] {
new Vector3(-1, -1, 0),
new Vector3(1, -1, 0),
new Vector3(1, 1, 0),
new Vector3(-1, 1, 0),
}
);
uvs = new VBO <Vector2>(
new Vector2[] {
new Vector2(0, 0),
new Vector2(1, 0),
new Vector2(1, 1),
new Vector2(0, 1),
}
);
triangles = new VBO <uint>(
new uint[] {
0, 1, 2, 0, 2, 3
}, BufferTarget.ElementArrayBuffer
);
drawScreen = new DrawRenderer(
new ShaderProgram(
File.ReadAllText(Assets.LoadPath("screenvert.glsl")),
File.ReadAllText(Assets.LoadPath("screenfrag.glsl"))
)
);
}
public void Unbind()
{
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, 0);
}
public void Bind()
{
Gl.BindRenderbuffer(RenderbufferTarget.Renderbuffer, Handle);
}
