/// <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="format"> </param>
/// <param name="width"> </param>
/// <param name="height"> </param>
/// <param name="numSamples"> </param>
public GLESRenderBuffer(All format, int width, int height, int numSamples)
: base(width, height, 1, GLESPixelUtil.GetClosestAxiomFormat(format), BufferUsage.WriteOnly)
{
_glInternalFormat = format;
/// Generate renderbuffer
OpenGLOES.GenRenderbuffers(1, ref this._renderbufferID);
GLESConfig.GlCheckError(this);
/// Bind it to FBO
OpenGLOES.BindRenderbuffer(All.RenderbufferOes, this._renderbufferID);
GLESConfig.GlCheckError(this);
/// Allocate storage for depth buffer
if (numSamples <= 0)
{
OpenGLOES.RenderbufferStorage(All.RenderbufferOes, format, width, height);
GLESConfig.GlCheckError(this);
}
}
