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");
}
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");
}
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");
}
