/// <summary>
/// Try a certain packed depth/stencil format, and return the status.
/// </summary>
/// <param name="packedFormat"> </param>
/// <returns> true if this combo is supported, false if not </returns>
private bool TryPacketFormat(All packedFormat)
{
int packedRB = 0;
/// Generate renderbuffer
OpenGLOES.GenRenderbuffers(1, ref packedRB);
//bind it to FBO
OpenGLOES.BindRenderbuffer(All.RenderbufferOes, packedRB);
/// Allocate storage for buffer
OpenGLOES.RenderbufferStorage(All.RenderbufferOes, packedFormat, ProbeSize, ProbeSize);
/// Attach depth
OpenGLOES.FramebufferRenderbuffer(All.FramebufferOes, All.DepthAttachmentOes, All.RenderbufferOes, packedRB);
/// Attach stencil
OpenGLOES.FramebufferRenderbuffer(All.FramebufferOes, All.StencilAttachmentOes, All.RenderbufferOes, packedRB);
All status = OpenGLOES.CheckFramebufferStatus(All.FramebufferOes);
/// Detach and destroy
OpenGLOES.FramebufferRenderbuffer(All.FramebufferOes, All.DepthAttachmentOes, All.RenderbufferOes, 0);
OpenGLOES.FramebufferRenderbuffer(All.FramebufferOes, All.StencilAttachmentOes, All.RenderbufferOes, 0);
OpenGLOES.DeleteRenderbuffers(1, ref packedRB);
return(status == All.FramebufferCompleteOes);
}
/// <summary>
/// Try a certain FBO format, and return the status. Also sets mDepthRB and mStencilRB.
/// </summary>
/// <param name="depthFormat"> </param>
/// <param name="stencilFormat"> </param>
/// <returns> true if this combo is supported, false if not </returns>
private bool TryFormat(All depthFormat, All stencilFormat)
{
int status = 0, depthRB = 0, stencilRB = 0;
if (depthFormat != 0)
{
/// Generate depth renderbuffer
OpenGLOES.GenRenderbuffers(1, ref depthRB);
/// Bind it to FBO;
OpenGLOES.RenderbufferStorage(All.RenderbufferOes, depthFormat, ProbeSize, ProbeSize);
/// Attach depth
OpenGLOES.FramebufferRenderbuffer(All.FramebufferOes, All.DepthAttachmentOes, All.RenderbufferOes, depthRB);
}
// Stencil buffers aren't available on iPhone
if (stencilFormat != 0)
{
/// Generate stencil renderbuffer
OpenGLOES.GenRenderbuffers(1, ref stencilRB);
//bind it to FBO
OpenGLOES.BindRenderbuffer(All.RenderbufferOes, stencilRB);
/// Allocate storage for stencil buffer
OpenGLOES.RenderbufferStorage(All.RenderbufferOes, stencilFormat, ProbeSize, ProbeSize);
/// Attach stencil
OpenGLOES.FramebufferRenderbuffer(All.FramebufferOes, All.StencilAttachmentOes, All.RenderbufferOes, stencilRB);
}
status = (int)OpenGLOES.CheckFramebufferStatus(All.FramebufferOes);
OpenGLOES.FramebufferRenderbuffer(All.FramebufferOes, All.DepthAttachmentOes, All.RenderbufferOes, depthRB);
OpenGLOES.FramebufferRenderbuffer(All.FramebufferOes, All.StencilAttachmentOes, All.RenderbufferOes, stencilRB);
if (depthRB != 0)
{
OpenGLOES.DeleteRenderbuffers(1, ref depthRB);
}
if (stencilRB != 0)
{
OpenGLOES.DeleteRenderbuffers(1, ref stencilRB);
}
//Clear OpenGL Errors create because of the evaluation
while (OpenGL.GetError() != All.NoError)
{
;
}
return(status == (int)All.FramebufferCompleteOes);
}
/// <summary>
/// </summary>
/// <param name="attachment"> </param>
/// <param name="zOffset"> </param>
public override void BindToFramebuffer(All attachment, int zOffset)
{
Utilities.Contract.Requires(zOffset < Depth);
OpenGLOES.FramebufferRenderbuffer(All.FramebufferOes, attachment, All.RenderbufferOes, this._renderbufferID);
GLESConfig.GlCheckError(this);
}
/// <summary>
/// </summary>
private void Intialize()
{
// Release depth and stencil, if they were bound
Manager.ReleaseRenderbuffer(this._depth);
Manager.ReleaseRenderbuffer(this._stencil);
Manager.ReleaseRenderbuffer(this._multisampleColorBuffer);
/// First buffer must be bound
if (this._color[0].Buffer == null)
{
throw new AxiomException("Attachment 0 must have surface attached");
}
// If we're doing multisampling, then we need another FBO which contains a
// renderbuffer which is set up to multisample, and we'll blit it to the final
// FBO afterwards to perform the multisample resolve. In that case, the
// mMultisampleFB is bound during rendering and is the one with a depth/stencil
/// Store basic stats
int width = this._color[0].Buffer.Width;
int height = this._color[0].Buffer.Height;
All format = this._color[0].Buffer.GLFormat;
Media.PixelFormat axiomFormat = this._color[0].Buffer.Format;
// Bind simple buffer to add colour attachments
OpenGLOES.BindFramebuffer(All.FramebufferOes, this._fb);
GLESConfig.GlCheckError(this);
/// Bind all attachment points to frame buffer
for (int x = 0; x < Configuration.Config.MaxMultipleRenderTargets; x++)
{
if (this._color[x].Buffer != null)
{
if (this._color[x].Buffer.Width != width || this._color[x].Buffer.Height != height)
{
string ss = string.Empty;
ss += "Attachment " + x + " has incompatible size ";
ss += this._color[x].Buffer.Width + "x" + this._color[0].Buffer.Height;
ss += ". It must be of the same as the size of surface 0, ";
ss += width + "x" + height;
ss += ".";
throw new AxiomException(ss);
}
if (this._color[x].Buffer.GLFormat != format)
{
string ss = string.Empty;
ss += "Attachment " + x + " has incompatible format.";
throw new AxiomException(ss);
}
this._color[x].Buffer.BindToFramebuffer(All.ColorAttachment0Oes + x, this._color[x].ZOffset);
}
else
{
// Detach
OpenGLOES.FramebufferRenderbuffer(All.FramebufferOes, All.ColorAttachment0Oes + x, All.RenderbufferOes, 0);
GLESConfig.GlCheckError(this);
}
} //end for x
// Now deal with depth / stencil
if (this._multiSampleFB != 0)
{
// Bind multisample buffer
OpenGLOES.BindFramebuffer(All.FramebufferOes, this._multiSampleFB);
GLESConfig.GlCheckError(this);
// Create AA render buffer (color)
// note, this can be shared too because we blit it to the final FBO
// right after the render is finished
this._multisampleColorBuffer = Manager.RequestRenderbuffer(format, width, height, this._numSamples);
// Attach it, because we won't be attaching below and non-multisample has
// actually been attached to other FBO
this._multisampleColorBuffer.Buffer.BindToFramebuffer(All.ColorAttachment0Oes, this._multisampleColorBuffer.ZOffset);
// depth & stencil will be dealt with below
}
/// Depth buffer is not handled here anymore.
/// See GLESFrameBufferObject::attachDepthBuffer() & RenderSystem::setDepthBufferFor()
/// Do glDrawBuffer calls
var bufs = new All[Configuration.Config.MaxMultipleRenderTargets];
int n = 0;
for (int x = 0; x < Configuration.Config.MaxMultipleRenderTargets; x++)
{
// Fill attached colour buffers
if (this._color[x].Buffer != null)
{
bufs[x] = All.ColorAttachment0Oes + x;
// Keep highest used buffer + 1
n = x + 1;
}
else
{
bufs[x] = All.Never;
}
} //end for x
/// Check status
All status = OpenGLOES.CheckFramebufferStatus(All.FramebufferOes);
GLESConfig.GlCheckError(this);
/// Bind main buffer
#if AXIOM_PLATFORM_IPHONE
// The screen buffer is 1 on iPhone
OpenGLOES.BindFramebuffer(All.FramebufferOes, 1);
#else
OpenGLOES.BindFramebuffer(All.FramebufferOes, 0);
#endif
GLESConfig.GlCheckError(this);
switch (status)
{
case All.FramebufferCompleteOes:
// everything is fine
break;
case All.FramebufferUnsupportedOes:
throw new AxiomException("All framebuffer formats with this texture internal format unsupported");
default:
throw new AxiomException("Framebuffer incomplete or other FBO status error");
}
}
