public override Bitmap Bitmap(TextureAttachment textureAttachment, RectangleI rectangle)
{
if (textureAttachment == TextureAttachment.Depth || textureAttachment == TextureAttachment.DepthStencil)
{
throw new CKGLException("Cannot read pixels of the Depth(Stecil) attachment.");
}
if (rectangle.X < 0 || rectangle.Y < 0 || rectangle.X + rectangle.W > Width || rectangle.Y + rectangle.H > Height)
{
throw new CKGLException("Rectangle outside of Framebuffer bounds.");
}
Framebuffer originalFramebuffer = Current;
Bind();
if (IsDefault)
{
if (textureAttachment == TextureAttachment.Depth || textureAttachment == TextureAttachment.DepthStencil)
{
throw new IllegalValueException(typeof(TextureAttachment), textureAttachment);
}
GL.ReadBuffer(ReadBuffer.Back);
}
else
{
GL.ReadBuffer((ReadBuffer)textureAttachment.ToOpenGL());
}
Bitmap bitmap = new Bitmap(GL.ReadPixelsAsColourArray(rectangle, PixelFormat.RGBA), rectangle.W, rectangle.H);
originalFramebuffer.Bind();
return(bitmap);
}
public override Texture GetTexture(TextureAttachment textureAttachment)
{
if (IsDefault)
{
throw new CKGLException($"Cannot get texture attachments from the Default Framebuffer.");
}
Texture result;
if (textureAttachment == TextureAttachment.Depth || textureAttachment == TextureAttachment.DepthStencil)
{
result = DepthStencilTexture;
}
else
{
result = Textures[(int)textureAttachment];
}
if (result == null)
{
throw new ArgumentOutOfRangeException($"No suitable texture found in Framebuffer texture attachment {textureAttachment}.");
}
return(result);
}
public void BlitTextureTo(Framebuffer target, TextureAttachment textureAttachment, BlitFilter filter, RectangleI rect)
{
if (textureAttachment < 0)
{
throw new ArgumentOutOfRangeException($"Can't blit a depth texture.");
}
Graphics.State.OnStateChanging.Invoke();
OpenGLFramebuffer originalFramebuffer = Current as OpenGLFramebuffer;
GL.BindFramebuffer(FramebufferTarget.Read, id);
Swaps++;
GL.BindFramebuffer(FramebufferTarget.Draw, ((OpenGLFramebuffer)target ?? (OpenGLFramebuffer)Default).id);
Swaps++;
Graphics.SetViewport(target);
Graphics.SetScissorTest(target);
GL.ReadBuffer((ReadBuffer)((uint)ReadBuffer.Colour0 + (uint)textureAttachment));
GL.BlitFramebuffer(new RectangleI(Width, Height), rect, BufferBit.Colour, filter.ToOpenGL());
//GL.BlitFramebuffer(new RectangleI(Width, Height), rect, textureAttachment >= 0 ? BufferBit.Colour : BufferBit.Depth, filter.ToOpenGL());
// Reset Framebuffer
GL.BindFramebuffer(FramebufferTarget.Framebuffer, (originalFramebuffer ?? (OpenGLFramebuffer)Default).id);
Blits++;
Graphics.State.OnStateChanged.Invoke();
}
public void BlitTextureTo(Framebuffer target, TextureAttachment textureAttachment, BlitFilter filter, RectangleI rect)
{
if (textureAttachment < 0)
{
throw new ArgumentOutOfRangeException($"Can't blit a depth texture.");
}
Graphics.State.OnStateChanging.Invoke();
WebGL2Framebuffer originalFramebuffer = Current as WebGL2Framebuffer;
GL.bindFramebuffer(READ_FRAMEBUFFER_Static, id);
Swaps++;
GL.bindFramebuffer(DRAW_FRAMEBUFFER_Static, ((WebGL2Framebuffer)target ?? (WebGL2Framebuffer)Default).id);
Swaps++;
Graphics.SetViewport(target);
Graphics.SetScissorTest(target);
GL.readBuffer(textureAttachment.ToWebGL2());
GL.blitFramebuffer(0, 0, Width, Height, rect.Left, rect.Bottom, rect.Right, rect.Top, COLOR_BUFFER_BIT, filter.ToWebGL2());
//GL.blitFramebuffer(new RectangleI(Width, Height), rect, textureAttachment >= 0 ? BufferBit.Colour : DEPTH_BUFFER_BIT, filter.ToWebGL2());
// Reset Framebuffer
GL.bindFramebuffer(FRAMEBUFFER, (originalFramebuffer ?? (WebGL2Framebuffer)Default).id);
Blits++;
Graphics.State.OnStateChanged.Invoke();
}
/// <summary>
/// Attach a texture.
/// <para>Bind() this framebuffer before invoking this method.</para>
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
public Texture Attach(TextureAttachment type)
{
const int level = 0;
Texture result = null;
switch (type)
{
case TextureAttachment.ColorAttachment:
result = new Texture(TextureTarget.Texture2D,
new TexImage2D(TexImage2D.Target.Texture2D, 0, (int)GL.GL_RGBA, this.Width, this.Height, 0, GL.GL_BGRA, GL.GL_UNSIGNED_BYTE));
result.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureWrapS, (int)GL.GL_REPEAT));
result.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureWrapT, (int)GL.GL_REPEAT));
result.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureWrapR, (int)GL.GL_REPEAT));
result.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureMinFilter, (int)GL.GL_LINEAR));
result.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureMagFilter, (int)GL.GL_LINEAR));
result.Initialize();
glFramebufferTexture(GL.GL_FRAMEBUFFER, attachment_id[nextColorAttachmentIndex++], result.Id, level);
break;
case TextureAttachment.DepthAttachment:
result = new Texture(TextureTarget.Texture2D,
new TexImage2D(TexImage2D.Target.Texture2D, 0, (int)GL.GL_DEPTH_COMPONENT32, this.Width, this.Height, 0, GL.GL_DEPTH_COMPONENT, GL.GL_FLOAT));
// 设置默认滤波模式
result.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureMinFilter, (int)GL.GL_LINEAR));
result.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureMagFilter, (int)GL.GL_LINEAR));
// 设置深度比较模式
result.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureCompareMode, (int)GL.GL_COMPARE_REF_TO_TEXTURE));
result.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureCompareFunc, (int)GL.GL_LEQUAL));
// 设置边界截取模式
result.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureWrapS, (int)GL.GL_CLAMP_TO_EDGE));
result.BuiltInSampler.Add(new TexParameteri(TexParameter.PropertyName.TextureWrapT, (int)GL.GL_CLAMP_TO_EDGE));
result.Initialize();
glFramebufferTexture(GL.GL_FRAMEBUFFER, GL.GL_DEPTH_ATTACHMENT, result.Id, level);
//glFramebufferTexture(GL.GL_FRAMEBUFFER, GL.GL_DEPTH_STENCIL_ATTACHMENT, result.Id, level);
//glFramebufferTexture2D(GL.GL_FRAMEBUFFER, GL.GL_DEPTH_ATTACHMENT, GL.GL_TEXTURE_2D, result.Id, level);
//glFramebufferTexture2D(GL.GL_FRAMEBUFFER, GL.GL_DEPTH_STENCIL_ATTACHMENT, GL.GL_TEXTURE_2D, result.Id, level);// error
break;
case TextureAttachment.StencilAttachment:
throw new NotImplementedException();
break;
case TextureAttachment.DepthStencilAttachment:
throw new NotImplementedException();
break;
default:
throw new NotImplementedException();
}
return(result);
}
private void AddTextureAttachment(TextureAttachment texa)
{
int index = _textureAttachments.FindIndex(a => a.Attachment == texa.Attachment);
if (index == -1)
{
if (_textureAttachments.Count == _maxAttacments)
{
throw new IndexOutOfRangeException("Maximum number of textures have already been attached to the FrameBuffer.");
}
_textureAttachments.Add(texa);
SetDrawBuffers();
}
else
{
_textureAttachments[index] = texa;
}
SetSize();
SetStatus();
}
public void Dispose()
{
if (Id == 0)
{
throw new InvalidOperationException("Already disposed.");
}
;
var gl = XEngineContext.Graphics;
TextureAttachment?.Dispose();
TextureAttachment = null;
DepthTextureAttachment?.Dispose();
DepthTextureAttachment = null;
DepthBufferAttachment?.Dispose();
DepthBufferAttachment = null;
gl.DeleteFramebuffersEXT(1u, glFrameBufferArray);
glFrameBufferArray[0] = 0u;
}
public void BlitTextureTo(Framebuffer target, TextureAttachment textureAttachment, BlitFilter filter, RectangleI rect)
{
throw new CKGLException($"WebGL 1.0 does not support blitting framebuffers.");
}
public void BlitTextureTo(Framebuffer target, TextureAttachment textureAttachment, BlitFilter filter, int x, int y) => BlitTextureTo(target, textureAttachment, filter, new RectangleI(x, y, Width, Height));
public override Bitmap Bitmap(TextureAttachment textureAttachment, RectangleI rectangle) => throw new NotImplementedException();
public abstract Bitmap Bitmap(TextureAttachment textureAttachment, RectangleI rectangle);
public Bitmap Bitmap(TextureAttachment textureAttachment) => Bitmap(textureAttachment, new RectangleI(0, 0, Width, Height));
public abstract Texture GetTexture(TextureAttachment textureAttachment);
internal static OpenGLBindings.TextureAttachment ToOpenGL(this TextureAttachment textureAttachment)
{
switch (textureAttachment)
{
case TextureAttachment.Depth:
return(OpenGLBindings.TextureAttachment.Depth);
case TextureAttachment.DepthStencil:
return(OpenGLBindings.TextureAttachment.DepthStencil);
case TextureAttachment.Colour0:
return(OpenGLBindings.TextureAttachment.Colour0);
case TextureAttachment.Colour1:
return(OpenGLBindings.TextureAttachment.Colour1);
case TextureAttachment.Colour2:
return(OpenGLBindings.TextureAttachment.Colour2);
case TextureAttachment.Colour3:
return(OpenGLBindings.TextureAttachment.Colour3);
case TextureAttachment.Colour4:
return(OpenGLBindings.TextureAttachment.Colour4);
case TextureAttachment.Colour5:
return(OpenGLBindings.TextureAttachment.Colour5);
case TextureAttachment.Colour6:
return(OpenGLBindings.TextureAttachment.Colour6);
case TextureAttachment.Colour7:
return(OpenGLBindings.TextureAttachment.Colour7);
case TextureAttachment.Colour8:
return(OpenGLBindings.TextureAttachment.Colour8);
case TextureAttachment.Colour9:
return(OpenGLBindings.TextureAttachment.Colour9);
case TextureAttachment.Colour10:
return(OpenGLBindings.TextureAttachment.Colour10);
case TextureAttachment.Colour11:
return(OpenGLBindings.TextureAttachment.Colour11);
case TextureAttachment.Colour12:
return(OpenGLBindings.TextureAttachment.Colour12);
case TextureAttachment.Colour13:
return(OpenGLBindings.TextureAttachment.Colour13);
case TextureAttachment.Colour14:
return(OpenGLBindings.TextureAttachment.Colour14);
case TextureAttachment.Colour15:
return(OpenGLBindings.TextureAttachment.Colour15);
default:
throw new IllegalValueException(typeof(TextureAttachment), textureAttachment);
}
}
internal static double ToWebGL2(this TextureAttachment textureAttachment)
{
switch (textureAttachment)
{
case TextureAttachment.Depth:
return(DEPTH_ATTACHMENT);
case TextureAttachment.DepthStencil:
return(DEPTH_STENCIL_ATTACHMENT);
case TextureAttachment.Colour0:
return(COLOR_ATTACHMENT0);
case TextureAttachment.Colour1:
return(COLOR_ATTACHMENT1_Static);
case TextureAttachment.Colour2:
return(COLOR_ATTACHMENT2_Static);
case TextureAttachment.Colour3:
return(COLOR_ATTACHMENT3_Static);
case TextureAttachment.Colour4:
return(COLOR_ATTACHMENT4_Static);
case TextureAttachment.Colour5:
return(COLOR_ATTACHMENT5_Static);
case TextureAttachment.Colour6:
return(COLOR_ATTACHMENT6_Static);
case TextureAttachment.Colour7:
return(COLOR_ATTACHMENT7_Static);
case TextureAttachment.Colour8:
return(COLOR_ATTACHMENT8_Static);
case TextureAttachment.Colour9:
return(COLOR_ATTACHMENT9_Static);
case TextureAttachment.Colour10:
return(COLOR_ATTACHMENT10_Static);
case TextureAttachment.Colour11:
return(COLOR_ATTACHMENT11_Static);
case TextureAttachment.Colour12:
return(COLOR_ATTACHMENT12_Static);
case TextureAttachment.Colour13:
return(COLOR_ATTACHMENT13_Static);
case TextureAttachment.Colour14:
return(COLOR_ATTACHMENT14_Static);
case TextureAttachment.Colour15:
return(COLOR_ATTACHMENT15_Static);
default:
throw new IllegalValueException(typeof(TextureAttachment), textureAttachment);
}
}
