/// <summary>
/// Bind FrameBufferObject
/// </summary>
public void Bind()
{
/// Bind it to FBO
int fb = this._multiSampleFB != 0 ? this._multiSampleFB : this._fb;
OpenGLOES.BindFramebuffer(All.FramebufferOes, fb);
GLESConfig.GlCheckError(this);
}
/// <summary>
/// Bind a certain render target if it is a FBO. If it is not a FBO, bind the main frame buffer.
/// </summary>
/// <param name="target"> </param>
public override void Bind(Graphics.RenderTarget target)
{
/// Check if the render target is in the rendertarget->FBO map
GLESFrameBufferObject fbo = null;
fbo = target["FBO"] as GLESFrameBufferObject;
if (fbo != null)
{
fbo.Bind();
}
else
{
// Old style context (window/pbuffer) or copying render texture
#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);
}
}
/// <summary>
/// Detect which internal formats are allowed as RTT Also detect what combinations of stencil and depth are allowed with this internal format.
/// </summary>
private void DetectFBOFormats()
{
// Try all formats, and report which ones work as target
int fb = 0, tid = 0;
All target = All.Texture2D;
for (int x = 0; x < (int)Media.PixelFormat.Count; x++)
{
LogManager.Instance.Write("[GLES] [DEBUG] testing PixelFormat : {0}", (Media.PixelFormat)x);
this._props[x] = new FormatProperties();
this._props[x].Modes = new List <FormatProperties.Mode>();
this._props[x].IsValid = false;
// Fetch GL format token
All fmt = GLESPixelUtil.GetClosestGLInternalFormat((Media.PixelFormat)x);
LogManager.Instance.Write("[GLES] [DEBUG] fmt={0}", fmt);
if (fmt == All.Zero && x != 0)
{
continue;
}
// No test for compressed formats
if (PixelUtil.IsCompressed((Media.PixelFormat)x))
{
continue;
}
// Create and attach framebuffer
OpenGLOES.GenRenderbuffers(1, ref fb);
GLESConfig.GlCheckError(this);
OpenGLOES.BindFramebuffer(All.FramebufferOes, fb);
GLESConfig.GlCheckError(this);
if (fmt != All.Zero)
{
// Create and attach texture
OpenGL.GenTextures(1, ref tid);
GLESConfig.GlCheckError(this);
OpenGL.BindTexture(target, tid);
GLESConfig.GlCheckError(this);
// Set some default parameters
OpenGL.TexParameterx(target, All.TextureMinFilter, (int)All.LinearMipmapNearest);
GLESConfig.GlCheckError(this);
OpenGL.TexParameterx(target, All.TextureMagFilter, (int)All.Nearest);
GLESConfig.GlCheckError(this);
OpenGL.TexParameterx(target, All.TextureWrapS, (int)All.ClampToEdge);
GLESConfig.GlCheckError(this);
OpenGL.TexParameterx(target, All.TextureWrapT, (int)All.ClampToEdge);
GLESConfig.GlCheckError(this);
OpenGL.TexImage2D(target, 0, (int)fmt, ProbeSize, ProbeSize, 0, fmt, All.UnsignedByte, IntPtr.Zero);
GLESConfig.GlCheckError(this);
OpenGLOES.FramebufferTexture2D(All.FramebufferOes, All.ColorAttachment0Oes, target, tid, 0);
GLESConfig.GlCheckError(this);
}
// Check status
All status = OpenGLOES.CheckFramebufferStatus(All.FramebufferOes);
GLESConfig.GlCheckError(this);
LogManager.Instance.Write("[GLES] [DEBUG] status={0}", status);
// Ignore status in case of fmt==GL_NONE, because no implementation will accept
// a buffer without *any* attachment. Buffers with only stencil and depth attachment
// might still be supported, so we must continue probing.
if (fmt == 0 || status == All.FramebufferCompleteOes)
{
this._props[x].IsValid = true;
var str = new StringBuilder();
str.Append("FBO " + PixelUtil.GetFormatName((Media.PixelFormat)x) + " depth/stencil support: ");
// For each depth/stencil formats
for (int depth = 0; depth < DepthFormats.Length; ++depth)
{
if (DepthFormats[depth] != All.Depth24Stencil8Oes)
{
// General depth/stencil combination
for (int stencil = 0; stencil < StencilFormats.Length; ++stencil)
{
if (TryFormat(DepthFormats[depth], StencilFormats[stencil]))
{
/// Add mode to allowed modes
str.Append("D" + DepthBits[depth] + "S" + StencilBits[stencil] + " ");
var mode = new FormatProperties.Mode();
mode.Depth = depth;
mode.Stencil = stencil;
this._props[x].Modes.Add(mode);
}
} //end for stencil
} //end if
else
{
// Packed depth/stencil format
if (TryPacketFormat(DepthFormats[depth]))
{
/// Add mode to allowed modes
str.Append("Packed-D" + DepthBits[depth] + "S8" + " ");
var mode = new FormatProperties.Mode();
mode.Depth = depth;
mode.Stencil = 0; //unused
this._props[x].Modes.Add(mode);
}
}
} //end for depth
LogManager.Instance.Write(str.ToString());
} //end if
// Delete texture and framebuffer
#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);
OpenGLOES.DeleteFramebuffers(1, ref fb);
GLESConfig.GlCheckError(this);
if (fmt != 0)
{
OpenGL.DeleteTextures(1, ref tid);
}
} //end for pixelformat count
string fmtstring = string.Empty;
for (int x = 0; x < (int)Media.PixelFormat.Count; x++)
{
if (this._props[x].IsValid)
{
fmtstring += PixelUtil.GetFormatName((Media.PixelFormat)x);
}
}
LogManager.Instance.Write("[GLES] : Valid FBO targets " + fmtstring);
}
/// <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");
}
}
