/// <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); } }
/// <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); }