public RenderBuffer(RenderbufferInternalFormat format)
{
this.format = format;
renderBuffer = GL.GenRenderbuffer();
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, renderBuffer);
// OpenGL docs don't specify that this is required, but seems to be required on some platforms
// to correctly attach in the GL.FramebufferRenderbuffer() call below
GL.RenderbufferStorage(RenderbufferTarget.Renderbuffer, format, 1, 1);
switch (format)
{
case RenderbufferInternalFormat.DepthComponent16:
attachment = FramebufferAttachment.DepthAttachment;
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, attachment, RenderbufferTarget.Renderbuffer, renderBuffer);
sizePerPixel = 2;
break;
case RenderbufferInternalFormat.Rgb565:
case RenderbufferInternalFormat.Rgb5A1:
case RenderbufferInternalFormat.Rgba4:
attachment = FramebufferAttachment.ColorAttachment0;
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, attachment, RenderbufferTarget.Renderbuffer, renderBuffer);
sizePerPixel = 2;
break;
case RenderbufferInternalFormat.StencilIndex8:
attachment = FramebufferAttachment.StencilAttachment;
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, attachment, RenderbufferTarget.Renderbuffer, renderBuffer);
sizePerPixel = 1;
break;
}
}
internal RenderBuffer(RenderbufferInternalFormat format)
{
this.Format = format;
info.ID = -1;
info.LastFramebuffer = -1;
}
/// <summary>
/// Attaches a RenderBuffer to this framebuffer.
/// </summary>
/// <param name="format">The type of RenderBuffer to attach.</param>
public void Attach(RenderbufferInternalFormat format)
{
if (attachedRenderBuffers.Exists(r => r.Format == format))
{
return;
}
attachedRenderBuffers.Add(new RenderBuffer(format));
}
public void Attach(RenderbufferInternalFormat format)
{
if (attachedFormats.Exists(f => f == format))
{
return;
}
attachedFormats.Add(format);
}
public RenderBuffer(RenderbufferInternalFormat format)
{
this.format = format;
renderBuffer = GL.GenRenderbuffer();
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, renderBuffer);
// OpenGL docs don't specify that this is required, but seems to be required on some platforms
// to correctly attach in the GL.FramebufferRenderbuffer() call below
GL.RenderbufferStorage(RenderbufferTarget.Renderbuffer, format, 1, 1);
attachment = format.GetAttachmentType();
sizePerPixel = format.GetBytesPerPixel();
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, attachment, RenderbufferTarget.Renderbuffer, renderBuffer);
}
public RenderBuffer(RenderbufferInternalFormat format)
{
Format = format;
}
private void SetupMultisampled()
{
// Generate texture target FBO
if (this.handleMainFBO == 0)
{
GL.GenFramebuffers(1, out this.handleMainFBO);
}
GL.BindFramebuffer(FramebufferTarget.Framebuffer, this.handleMainFBO);
// Attach textures
int oglWidth = 0;
int oglHeight = 0;
for (int i = 0; i < this.targetInfos.Count; i++)
{
NativeTexture tex = this.targetInfos[i].Target;
FramebufferSlot attachment = (FramebufferSlot)((int)FramebufferSlot.ColorAttachment0 + i);
GL.FramebufferTexture2D(
FramebufferTarget.Framebuffer,
attachment,
TextureTarget.Texture2D,
tex.Handle,
0);
oglWidth = tex.Width;
oglHeight = tex.Height;
}
// Check status
FramebufferErrorCode status = GL.CheckFramebufferStatus(FramebufferTarget.Framebuffer);
if (status != FramebufferErrorCode.FramebufferComplete)
{
throw new BackendException(string.Format("Incomplete Framebuffer: {0}", status));
}
// Generate rendering FBO
if (this.handleMsaaFBO == 0)
{
GL.GenFramebuffers(1, out this.handleMsaaFBO);
}
GL.BindFramebuffer(FramebufferTarget.Framebuffer, this.handleMsaaFBO);
// Attach color renderbuffers
for (int i = 0; i < this.targetInfos.Count; i++)
{
TargetInfo info = this.targetInfos.Data[i];
FramebufferSlot attachment = (FramebufferSlot)((int)FramebufferSlot.ColorAttachment0 + i);
RenderbufferInternalFormat rbColorFormat = TexFormatToRboFormat(info.Target.Format);
if (info.HandleMsaaColorRBO == 0)
{
GL.GenRenderbuffers(1, out info.HandleMsaaColorRBO);
}
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, info.HandleMsaaColorRBO);
GL.RenderbufferStorageMultisample(RenderbufferTarget.Renderbuffer, this.samples, rbColorFormat, oglWidth, oglHeight);
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, attachment, RenderbufferTarget.Renderbuffer, info.HandleMsaaColorRBO);
this.targetInfos.Data[i] = info;
}
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, 0);
// Generate or delete depth renderbuffer
if (this.depthBuffer)
{
if (this.handleDepthRBO == 0)
{
GL.GenRenderbuffers(1, out this.handleDepthRBO);
}
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, this.handleDepthRBO);
GL.RenderbufferStorageMultisample(RenderbufferTarget.Renderbuffer, this.samples, RenderbufferInternalFormat.DepthComponent24, oglWidth, oglHeight);
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferSlot.DepthAttachment, RenderbufferTarget.Renderbuffer, this.handleDepthRBO);
GL.BindRenderbuffer(RenderbufferTarget.Renderbuffer, 0);
}
else
{
GL.FramebufferRenderbuffer(FramebufferTarget.Framebuffer, FramebufferSlot.DepthAttachment, RenderbufferTarget.Renderbuffer, 0);
if (this.handleDepthRBO != 0)
{
GL.DeleteRenderbuffers(1, ref this.handleDepthRBO);
}
this.handleDepthRBO = 0;
}
// Check status
status = GL.CheckFramebufferStatus(FramebufferTarget.Framebuffer);
if (status != FramebufferErrorCode.FramebufferComplete)
{
throw new BackendException(string.Format("Incomplete Multisample Framebuffer: {0}", status));
}
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0);
}
internal void Attach(RenderbufferInternalFormat format)
{
frameBuffer.Attach(format);
}
public static int GetBytesPerPixel(this RenderbufferInternalFormat format)
{
// cross-reference: https://www.khronos.org/registry/OpenGL-Refpages/es3.0/html/glTexImage2D.xhtml
switch (format)
{
// GL_RED
case RenderbufferInternalFormat.R8:
case RenderbufferInternalFormat.R8Snorm:
return(1);
case RenderbufferInternalFormat.R16f:
return(2);
case RenderbufferInternalFormat.R32f:
return(4);
// GL_RED_INTEGER
case RenderbufferInternalFormat.R8ui:
case RenderbufferInternalFormat.R8i:
return(1);
case RenderbufferInternalFormat.R16ui:
case RenderbufferInternalFormat.R16i:
return(2);
case RenderbufferInternalFormat.R32ui:
case RenderbufferInternalFormat.R32i:
return(4);
// GL_RG
case RenderbufferInternalFormat.Rg8:
case RenderbufferInternalFormat.Rg8Snorm:
return(2);
case RenderbufferInternalFormat.Rg16f:
return(4);
case RenderbufferInternalFormat.Rg32f:
return(8);
// GL_RG_INTEGER
case RenderbufferInternalFormat.Rg8ui:
case RenderbufferInternalFormat.Rg8i:
return(2);
case RenderbufferInternalFormat.Rg16ui:
case RenderbufferInternalFormat.Rg16i:
return(4);
case RenderbufferInternalFormat.Rg32ui:
case RenderbufferInternalFormat.Rg32i:
return(8);
// GL_RGB
case RenderbufferInternalFormat.Rgb8:
case RenderbufferInternalFormat.Srgb8:
return(3);
case RenderbufferInternalFormat.Rgb565:
return(2);
case RenderbufferInternalFormat.Rgb8Snorm:
return(3);
case RenderbufferInternalFormat.R11fG11fB10f:
case RenderbufferInternalFormat.Rgb9E5:
return(4);
case RenderbufferInternalFormat.Rgb16f:
return(6);
case RenderbufferInternalFormat.Rgb32f:
return(12);
// GL_RGB_INTEGER
case RenderbufferInternalFormat.Rgb8ui:
case RenderbufferInternalFormat.Rgb8i:
return(3);
case RenderbufferInternalFormat.Rgb16ui:
case RenderbufferInternalFormat.Rgb16i:
return(6);
case RenderbufferInternalFormat.Rgb32ui:
case RenderbufferInternalFormat.Rgb32i:
return(12);
// GL_RGBA
case RenderbufferInternalFormat.Rgba8:
case RenderbufferInternalFormat.Srgb8Alpha8:
case RenderbufferInternalFormat.Rgba8Snorm:
return(4);
case RenderbufferInternalFormat.Rgb5A1:
case RenderbufferInternalFormat.Rgba4:
return(2);
case RenderbufferInternalFormat.Rgb10A2:
return(4);
case RenderbufferInternalFormat.Rgba16f:
return(8);
case RenderbufferInternalFormat.Rgba32f:
return(16);
// GL_RGBA_INTEGER
case RenderbufferInternalFormat.Rgba8i:
case RenderbufferInternalFormat.Rgba8ui:
case RenderbufferInternalFormat.Rgb10A2ui:
return(4);
case RenderbufferInternalFormat.Rgba16i:
case RenderbufferInternalFormat.Rgba16ui:
return(8);
case RenderbufferInternalFormat.Rgba32i:
case RenderbufferInternalFormat.Rgba32ui:
return(16);
// GL_DEPTH_COMPONENT
case RenderbufferInternalFormat.DepthComponent16:
return(2);
case RenderbufferInternalFormat.DepthComponent24:
return(3);
case RenderbufferInternalFormat.DepthComponent32f:
return(4);
// GL_DEPTH_STENCIL
case RenderbufferInternalFormat.Depth24Stencil8:
return(4);
case RenderbufferInternalFormat.Depth32fStencil8:
return(5);
case RenderbufferInternalFormat.StencilIndex8:
return(1);
default:
throw new InvalidOperationException($"{format} is not a valid {nameof(RenderbufferInternalFormat)} type.");
}
}
public static FramebufferAttachment GetAttachmentType(this RenderbufferInternalFormat format)
{
switch (format)
{
case RenderbufferInternalFormat.R8:
case RenderbufferInternalFormat.R8Snorm:
case RenderbufferInternalFormat.R16f:
case RenderbufferInternalFormat.R32f:
case RenderbufferInternalFormat.R8ui:
case RenderbufferInternalFormat.R8i:
case RenderbufferInternalFormat.R16ui:
case RenderbufferInternalFormat.R16i:
case RenderbufferInternalFormat.R32ui:
case RenderbufferInternalFormat.R32i:
case RenderbufferInternalFormat.Rg8:
case RenderbufferInternalFormat.Rg8Snorm:
case RenderbufferInternalFormat.Rg16f:
case RenderbufferInternalFormat.Rg32f:
case RenderbufferInternalFormat.Rg8ui:
case RenderbufferInternalFormat.Rg8i:
case RenderbufferInternalFormat.Rg16ui:
case RenderbufferInternalFormat.Rg16i:
case RenderbufferInternalFormat.Rg32ui:
case RenderbufferInternalFormat.Rg32i:
case RenderbufferInternalFormat.Rgb8:
case RenderbufferInternalFormat.Srgb8:
case RenderbufferInternalFormat.Rgb565:
case RenderbufferInternalFormat.Rgb8Snorm:
case RenderbufferInternalFormat.R11fG11fB10f:
case RenderbufferInternalFormat.Rgb9E5:
case RenderbufferInternalFormat.Rgb16f:
case RenderbufferInternalFormat.Rgb32f:
case RenderbufferInternalFormat.Rgb8ui:
case RenderbufferInternalFormat.Rgb8i:
case RenderbufferInternalFormat.Rgb16ui:
case RenderbufferInternalFormat.Rgb16i:
case RenderbufferInternalFormat.Rgb32ui:
case RenderbufferInternalFormat.Rgb32i:
case RenderbufferInternalFormat.Rgba8:
case RenderbufferInternalFormat.Srgb8Alpha8:
case RenderbufferInternalFormat.Rgba8Snorm:
case RenderbufferInternalFormat.Rgb5A1:
case RenderbufferInternalFormat.Rgba4:
case RenderbufferInternalFormat.Rgb10A2:
case RenderbufferInternalFormat.Rgba16f:
case RenderbufferInternalFormat.Rgba32f:
case RenderbufferInternalFormat.Rgba8i:
case RenderbufferInternalFormat.Rgba8ui:
case RenderbufferInternalFormat.Rgb10A2ui:
case RenderbufferInternalFormat.Rgba16i:
case RenderbufferInternalFormat.Rgba16ui:
case RenderbufferInternalFormat.Rgba32i:
case RenderbufferInternalFormat.Rgba32ui:
return(FramebufferAttachment.ColorAttachment0);
case RenderbufferInternalFormat.DepthComponent16:
case RenderbufferInternalFormat.DepthComponent24:
case RenderbufferInternalFormat.DepthComponent32f:
return(FramebufferAttachment.DepthAttachment);
case RenderbufferInternalFormat.StencilIndex8:
return(FramebufferAttachment.StencilAttachment);
case RenderbufferInternalFormat.Depth24Stencil8:
case RenderbufferInternalFormat.Depth32fStencil8:
return(FramebufferAttachment.DepthStencilAttachment);
default:
throw new InvalidOperationException($"{format} is not a valid {nameof(RenderbufferInternalFormat)} type.");
}
}
