public static Texture2d Create(Color4 color, string description, int width = 1, int height = 1, TextureOptions textureOptions = null)
{
textureOptions = textureOptions ?? TextureOptions.Default;
var textureId = GL.GenTexture();
try
{
var data = new int[width * height];
for (int i = 0; i < width * height; i++)
{
data[i] = color.ToRgba();
}
DrawState.BindTexture(textureId);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, width, height, 0, OpenTK.Graphics.OpenGL.PixelFormat.Rgba, PixelType.UnsignedByte, data);
if (textureOptions.GenerateMipmaps)
{
GL.GenerateMipmap(GenerateMipmapTarget.Texture2D);
GL.Finish();
}
DrawState.CheckError("specifying texture");
textureOptions.ApplyParameters(TextureTarget.Texture2D);
}
catch (Exception)
{
GL.DeleteTexture(textureId);
DrawState.UnbindTexture(textureId);
throw;
}
return(new Texture2d(textureId, width, height, description));
}
public void Begin(bool clear = true)
{
if (started)
{
throw new InvalidOperationException("Already started");
}
DrawState.FlushRenderer();
validate();
previousViewport = DrawState.Viewport;
GL.GetInteger(GetPName.FramebufferBinding, out previousFrameBufferId);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, frameBufferId);
GL.DrawBuffer(DrawBufferMode.ColorAttachment0);
DrawState.CheckError("binding fbo");
DrawState.Viewport = new Rectangle(0, 0, width, height);
if (clear)
{
// XXX need GL.DepthMask(true); to clear depth, but setting it here may cause issues with renderstate cache
GL.ClearColor(0, 0, 0, 0);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit | ClearBufferMask.StencilBufferBit);
}
started = true;
}
private void initialize(int width, int height)
{
Width = width;
Height = height;
PixelInternalFormat pixelInternalFormat = (PixelInternalFormat)storage;
PixelFormat pixelFormat;
PixelType pixelType;
switch (storage)
{
case RenderbufferStorage.DepthComponent:
case RenderbufferStorage.DepthComponent16:
case RenderbufferStorage.DepthComponent24:
case RenderbufferStorage.DepthComponent32:
case RenderbufferStorage.DepthComponent32f:
pixelFormat = PixelFormat.DepthComponent;
pixelType = PixelType.Float;
break;
case RenderbufferStorage.DepthStencil:
case RenderbufferStorage.Depth32fStencil8:
case RenderbufferStorage.Depth24Stencil8:
pixelFormat = PixelFormat.DepthStencil;
pixelType = PixelType.UnsignedInt248;
break;
case RenderbufferStorage.StencilIndex1:
case RenderbufferStorage.StencilIndex4:
case RenderbufferStorage.StencilIndex8:
case RenderbufferStorage.StencilIndex16:
pixelFormat = PixelFormat.StencilIndex;
pixelType = PixelType.Float;
break;
default:
pixelFormat = PixelFormat.Rgba;
pixelType = PixelType.UnsignedByte;
break;
}
var textureId = GL.GenTexture();
Texture = new Texture2d(textureId, Width, Height, "rendertexture");
DrawState.BindPrimaryTexture(textureId);
GL.TexImage2D(TextureTarget.Texture2D, 0, pixelInternalFormat, Width, Height, 0, pixelFormat, pixelType, IntPtr.Zero);
DrawState.CheckError("creating a render texture's texture");
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)TextureMagFilter.Linear);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)TextureMinFilter.Linear);
DrawState.UnbindTexture(textureId);
Debug.Print(width + "x" + height + " " + storage + " render texture created");
}
public void Update(Bitmap bitmap, int x, int y)
{
DrawState.BindPrimaryTexture(textureId, TexturingModes.Texturing2d);
var bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
GL.TexSubImage2D(TextureTarget.Texture2D, 0, x, y, bitmapData.Width, bitmapData.Height, OpenTK.Graphics.OpenGL.PixelFormat.Bgra, PixelType.UnsignedByte, bitmapData.Scan0);
GL.Finish();
bitmap.UnlockBits(bitmapData);
DrawState.CheckError("updating texture");
}
protected override void initializeVertexBuffer()
{
base.initializeVertexBuffer();
vertexBufferSize = minRenderableVertexCount * vertexDeclaration.VertexSize;
GL.BindBuffer(BufferTarget.ArrayBuffer, vertexBufferId);
GL.BufferStorage(BufferTarget.ArrayBuffer, (IntPtr)vertexBufferSize, IntPtr.Zero, BufferStorageFlags.MapWriteBit | BufferStorageFlags.MapPersistentBit | BufferStorageFlags.MapCoherentBit);
bufferPointer = GL.MapBufferRange(BufferTarget.ArrayBuffer, IntPtr.Zero, (IntPtr)vertexBufferSize, BufferAccessMask.MapWriteBit | BufferAccessMask.MapPersistentBit | BufferAccessMask.MapCoherentBit);
DrawState.CheckError("mapping vertex buffer", bufferPointer == null);
GL.BindBuffer(BufferTarget.ArrayBuffer, 0);
}
public void ApplyParameters(TextureTarget target)
{
if (TextureLodBias != 0)
{
GL.TexEnv(TextureEnvTarget.TextureFilterControl, TextureEnvParameter.TextureLodBias, TextureLodBias);
}
GL.TexParameter(target, TextureParameterName.TextureMinFilter, (int)TextureMinFilter);
GL.TexParameter(target, TextureParameterName.TextureMagFilter, (int)TextureMagFilter);
GL.TexParameter(target, TextureParameterName.TextureWrapS, (int)TextureWrapS);
GL.TexParameter(target, TextureParameterName.TextureWrapT, (int)TextureWrapT);
DrawState.CheckError("applying texture parameters");
}
public void Begin(bool clear = true)
{
if (started)
{
throw new InvalidOperationException("Already started");
}
DrawState.FlushRenderer();
if (!initialized)
{
initialize();
}
previousViewport = DrawState.Viewport;
GL.GetInteger(GetPName.FramebufferBinding, out previousFrameBufferId);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, frameBufferId);
if (renderTextures.Length == 1)
{
GL.DrawBuffer(DrawBufferMode.ColorAttachment0);
}
else if (renderTextures.Length > 1)
{
var buffers = new DrawBuffersEnum[renderTextures.Length];
for (int i = 0, size = renderTextures.Length; i < size; i++)
{
Debug.Assert(DrawBuffersEnum.ColorAttachment0 + i <= DrawBuffersEnum.ColorAttachment15);
buffers[i] = DrawBuffersEnum.ColorAttachment0 + i;
}
GL.DrawBuffers(buffers.Length, buffers);
}
DrawState.CheckError("binding fbo");
DrawState.Viewport = new Rectangle(0, 0, width, height);
if (clear)
{
GL.ClearColor(0, 0, 0, 0);
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit | ClearBufferMask.StencilBufferBit);
}
started = true;
}
public void Update(Bitmap bitmap, int x, int y)
{
if (bitmap.Width < 1 || bitmap.Height < 1)
{
throw new InvalidOperationException($"Invalid bitmap size: {bitmap.Width}x{bitmap.Height}");
}
if (x + bitmap.Width > Width || y + bitmap.Height > Height)
{
throw new InvalidOperationException($"Invalid update bounds: {bitmap.Width}x{bitmap.Height} at {x},{y} overflows {Width}x{Height}");
}
DrawState.BindPrimaryTexture(textureId, TexturingModes.Texturing2d);
var bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
GL.TexSubImage2D(TextureTarget.Texture2D, 0, x, y, bitmapData.Width, bitmapData.Height, OpenTK.Graphics.OpenGL.PixelFormat.Bgra, PixelType.UnsignedByte, bitmapData.Scan0);
GL.Finish();
bitmap.UnlockBits(bitmapData);
DrawState.CheckError("updating texture");
}
public static Texture2d Load(Bitmap bitmap, string description, TextureOptions textureOptions = null)
{
if (bitmap == null)
{
throw new ArgumentNullException(nameof(bitmap));
}
textureOptions = textureOptions ?? TextureOptions.Default;
var sRgb = textureOptions.Srgb && DrawState.ColorCorrected;
var textureId = GL.GenTexture();
try
{
DrawState.BindTexture(textureId);
var bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
GL.TexImage2D(TextureTarget.Texture2D, 0, sRgb ? PixelInternalFormat.SrgbAlpha : PixelInternalFormat.Rgba, bitmapData.Width, bitmapData.Height, 0, OpenTK.Graphics.OpenGL.PixelFormat.Bgra, PixelType.UnsignedByte, bitmapData.Scan0);
if (textureOptions.GenerateMipmaps)
{
GL.GenerateMipmap(GenerateMipmapTarget.Texture2D);
}
GL.Finish();
bitmap.UnlockBits(bitmapData);
DrawState.CheckError("specifying texture");
textureOptions.ApplyParameters(TextureTarget.Texture2D);
}
catch (Exception)
{
GL.DeleteTexture(textureId);
DrawState.UnbindTexture(textureId);
throw;
}
return(new Texture2d(textureId, bitmap.Width, bitmap.Height, description));
}
private void initialize()
{
GL.GetInteger(GetPName.FramebufferBinding, out previousFrameBufferId);
// Create the framebuffer
frameBufferId = GL.GenFramebuffer();
GL.BindFramebuffer(FramebufferTarget.Framebuffer, frameBufferId);
// Attach textures
for (int i = 0, size = renderTextures.Length; i < size; i++)
{
var renderTexture = renderTextures[i];
if (i == 0)
{
width = renderTexture.Width;
height = renderTexture.Height;
}
else if (width != renderTexture.Width || height != renderTexture.Height)
{
throw new InvalidOperationException("Render textures must have the same size");
}
var textureId = renderTexture.Texture.TextureId;
Debug.Assert(FramebufferAttachment.ColorAttachment0 + i <= FramebufferAttachment.ColorAttachment15);
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0 + i, TextureTarget.Texture2D, textureId, 0);
}
if (depthStencilTexture != null)
{
if (width != depthStencilTexture.Width || height != depthStencilTexture.Height)
{
throw new InvalidOperationException("The depth / stencil texture must have the same size as the render textures");
}
var textureId = depthStencilTexture.Texture.TextureId;
switch (depthStencilTexture.Storage)
{
case RenderbufferStorage.DepthComponent:
case RenderbufferStorage.DepthComponent16:
case RenderbufferStorage.DepthComponent24:
case RenderbufferStorage.DepthComponent32:
case RenderbufferStorage.DepthComponent32f:
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, TextureTarget.Texture2D, textureId, 0);
break;
case RenderbufferStorage.DepthStencil:
case RenderbufferStorage.Depth24Stencil8:
case RenderbufferStorage.Depth32fStencil8:
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthStencilAttachment, TextureTarget.Texture2D, textureId, 0);
break;
case RenderbufferStorage.StencilIndex1:
case RenderbufferStorage.StencilIndex4:
case RenderbufferStorage.StencilIndex8:
case RenderbufferStorage.StencilIndex16:
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.StencilAttachment, TextureTarget.Texture2D, textureId, 0);
break;
default:
throw new NotSupportedException(depthStencilTexture.Storage + " storage isn't supported for the depth / stencil texture.");
}
}
// Check
var status = GL.CheckFramebufferStatus(FramebufferTarget.Framebuffer);
if (status != FramebufferErrorCode.FramebufferComplete)
{
throw new Exception("frame buffer couldn't be constructed: " + status);
}
DrawState.CheckError("initializing multi render target");
GL.BindFramebuffer(FramebufferTarget.Framebuffer, previousFrameBufferId);
Debug.Print(width + "x" + height + " multi render target created");
initialized = true;
}
private void initialize()
{
textureId = GL.GenTexture();
texture = new Texture2d(textureId, width, height, "rendertarget");
DrawState.BindPrimaryTexture(textureId);
GL.TexImage2D(TextureTarget.Texture2D, 0, internalFormat, width, height, 0, pixelFormat, pixelType, IntPtr.Zero);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMagFilter, (int)textureMagFilter);
GL.TexParameter(TextureTarget.Texture2D, TextureParameterName.TextureMinFilter, (int)textureMinFilter);
GL.GetInteger(GetPName.FramebufferBinding, out previousFrameBufferId);
frameBufferId = GL.GenFramebuffer();
GL.BindFramebuffer(FramebufferTarget.Framebuffer, frameBufferId);
GL.FramebufferTexture2D(FramebufferTarget.Framebuffer, FramebufferAttachment.ColorAttachment0, TextureTarget.Texture2D, textureId, 0);
DrawState.CheckError("creating fbo");
if (renderBufferType != null)
{
renderBufferId = GL.GenRenderbuffer();
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, renderBufferId);
GL.RenderbufferStorage(RenderbufferTarget.Renderbuffer, renderBufferType.Value, width, height);
switch (renderBufferType.Value)
{
case RenderbufferStorage.DepthComponent:
case RenderbufferStorage.DepthComponent16:
case RenderbufferStorage.DepthComponent24:
case RenderbufferStorage.DepthComponent32:
case RenderbufferStorage.DepthComponent32f:
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthAttachment, RenderbufferTarget.Renderbuffer, renderBufferId);
break;
case RenderbufferStorage.DepthStencil:
case RenderbufferStorage.Depth24Stencil8:
case RenderbufferStorage.Depth32fStencil8:
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.DepthStencilAttachment, RenderbufferTarget.Renderbuffer, renderBufferId);
break;
case RenderbufferStorage.StencilIndex1:
case RenderbufferStorage.StencilIndex4:
case RenderbufferStorage.StencilIndex8:
case RenderbufferStorage.StencilIndex16:
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferAttachment.StencilAttachment, RenderbufferTarget.Renderbuffer, renderBufferId);
break;
default:
throw new NotSupportedException("renderBufferType " + renderBufferType.Value + " isn't supported.");
}
}
var status = GL.CheckFramebufferStatus(FramebufferTarget.Framebuffer);
if (status != FramebufferErrorCode.FramebufferComplete)
{
throw new Exception("frame buffer couldn't be constructed: " + status);
}
DrawState.UnbindTexture(textureId);
GL.BindFramebuffer(FramebufferTarget.Framebuffer, previousFrameBufferId);
Debug.Print(width + "x" + height + " render target created");
}
