private void BuildMipmaps(PixelBox data)
{
int width, height, logW, logH, level;
PixelBox scaled = data;
scaled.Data = data.Data;
scaled.Left = data.Left;
scaled.Right = data.Right;
scaled.Top = data.Top;
scaled.Bottom = data.Bottom;
scaled.Front = data.Front;
scaled.Back = data.Back;
width = data.Width;
height = data.Height;
logW = (int)System.Math.Log(width);
logH = (int)System.Math.Log(height);
level = (logW > logH ? logW : logH);
for (int mip = 0; mip < level; mip++)
{
All glFormat = GLES2PixelUtil.GetGLOriginFormat(scaled.Format);
All dataType = GLES2PixelUtil.GetGLOriginDataType(scaled.Format);
GL.TexImage2D(this.faceTarget, mip, (int)glFormat, width, height, 0, glFormat, dataType, scaled.Data.Pin());
GLES2Config.GlCheckError(this);
if (mip != 0)
{
scaled.Data = null;
}
if (width > 1)
{
width /= 2;
}
if (height > 1)
{
height /= 2;
}
int sizeInBytes = PixelUtil.GetMemorySize(width, height, 1, data.Format);
scaled = new PixelBox(width, height, 1, data.Format);
scaled.Data = BufferBase.Wrap(new byte[sizeInBytes]);
Image.Scale(data, scaled, ImageFilter.Linear);
}
//Delete the scaled data for the last level
if (level > 0)
{
scaled.Data = null;
}
}
/// <summary>
/// Internal method, create GLHardwarePixelBuffers for every face and mipmap level.
/// This method must be called after the GL texture object was created, the number of mipmaps
/// was set (Axiom.Configuration.Config.MaxTextureLayers) and glTexImageXD was called
/// to allocate the buffer
/// </summary>te
private void CreateSurfaceList()
{
this.surfaceList.Clear();
//For all faces and mipmaps, store surfaces as HardwarePixelBuffer
bool wantGeneratedMips = (usage & TextureUsage.AutoMipMap) != 0;
// Do mipmapping in software? (uses GLU) For some cards, this is still needed. Of course,
// only when mipmap generation is desired.
bool doSoftware = wantGeneratedMips && !mipmapsHardwareGenerated && MipmapCount > 0;
for (int face = 0; face < FaceCount; face++)
{
int width = Width;
int height = Height;
for (int mip = 0; mip <= MipmapCount; mip++)
{
GLES2HardwarePixelBuffer buf = new GLES2TextureBuffer(_name, this.GLES2TextureTarget, this.textureID, width, height, GLES2PixelUtil.GetClosestGLInternalFormat(format, hwGamma), (GLenum)GLES2PixelUtil.GetGLOriginDataType(format), face, mip, (BufferUsage)(usage), doSoftware && mip == 0, hwGamma, fsaa);
this.surfaceList.Add(buf);
//check for error
if (buf.Width == 0 || buf.Height == 0 || buf.Depth == 0)
{
throw new AxiomException("Zero sized texture surface on texture " + Name + " face " + face.ToString() + " mipmap " + mip.ToString() + ". The GL driver probably refused to create the texture.");
}
}
}
}
protected override void createInternalResources()
{
//Conver to nearest power of two size if require
this.width = GLES2PixelUtil.OptionalPO2(Width);
this.height = GLES2PixelUtil.OptionalPO2(Height);
this.depth = GLES2PixelUtil.OptionalPO2(Depth);
//Adjust format if required
format = TextureManager.Instance.GetNativeFormat(textureType, Format, usage);
//Check requested number of mipmaps
int maxMips = GLES2PixelUtil.GetMaxMipmaps(this.width, this.height, this.depth, format);
if (PixelUtil.IsCompressed(format) && (mipmapCount == 0))
{
requestedMipmapCount = 0;
}
mipmapCount = requestedMipmapCount;
if (mipmapCount > maxMips)
{
mipmapCount = maxMips;
}
//Generate texture name
GL.GenTextures(1, ref this.textureID);
GLES2Config.GlCheckError(this);
//Set texture name
GL.BindTexture(this.GLES2TextureTarget, this.textureID);
GLES2Config.GlCheckError(this);
//Set some misc default parameters, tehse can of course be changed later
GL.TexParameter(this.GLES2TextureTarget, GLenum.TextureMinFilter, (int)GLenum.Nearest);
GLES2Config.GlCheckError(this);
GL.TexParameter(this.GLES2TextureTarget, GLenum.TextureMagFilter, (int)GLenum.Nearest);
GLES2Config.GlCheckError(this);
GL.TexParameter(this.GLES2TextureTarget, GLenum.TextureWrapS, (int)GLenum.ClampToEdge);
GLES2Config.GlCheckError(this);
GL.TexParameter(this.GLES2TextureTarget, GLenum.TextureWrapT, (int)GLenum.ClampToEdge);
GLES2Config.GlCheckError(this);
//If we can do automip generation and the user desires this, do so
mipmapsHardwareGenerated = Root.Instance.RenderSystem.Capabilities.HasCapability(Capabilities.HardwareMipMaps) && !PixelUtil.IsCompressed(format);
//Ogre FIXME: For some reason this is crashing on iOS 5
#if !MONOTOUCH && ANDROID
if ((usage & TextureUsage.AutoMipMap) == TextureUsage.AutoMipMap && requestedMipmapCount > 0 && mipmapsHardwareGenerated && (textureType != Graphics.TextureType.CubeMap))
{
GL.GenerateMipmap(this.GLES2TextureTarget);
GLES2Config.GlCheckError(this);
}
#endif
//Allocate internal buffer so that glTexSubImageXD can be used
//INternal format
GLenum glformat = GLES2PixelUtil.GetClosestGLInternalFormat(format, hwGamma);
GLenum dataType = GLES2PixelUtil.GetGLOriginDataType(format);
int width = Width;
int height = Height;
int depth = Depth;
if (PixelUtil.IsCompressed(format))
{
//Compressed formats
int size = PixelUtil.GetMemorySize(Width, Height, Depth, Format);
// Provide temporary buffer filled with zeroes as glCompressedTexImageXD does not
// accept a 0 pointer like normal glTexImageXD
// Run through this process for every mipmap to pregenerate mipmap pyramid
var tmpData = new IntPtr();
for (int mip = 0; mip < mipmapCount; mip++)
{
size = PixelUtil.GetMemorySize(width, height, depth, Format);
switch (textureType)
{
case TextureType.OneD:
case TextureType.TwoD:
GL.CompressedTexImage2D(GLenum.Texture2D, mip, glformat, width, height, 0, size, tmpData);
GLES2Config.GlCheckError(this);
break;
case TextureType.CubeMap:
for (int face = 0; face < 6; face++)
{
GL.CompressedTexImage2D((GLenum)((int)GLenum.TextureCubeMapPositiveX + face), mip, glformat, width, height, 0, size, tmpData);
GLES2Config.GlCheckError(this);
}
break;
case TextureType.ThreeD:
break;
default:
break;
}
if (width > 1)
{
width = width / 2;
}
if (height > 1)
{
height = height / 2;
}
if (depth > 1)
{
depth = depth / 2;
}
}
tmpData = IntPtr.Zero;
}
else
{
//Run through this process to pregenerate mipmap pyramid
for (int mip = 0; mip < mipmapCount; mip++)
{
//Normal formats
switch (textureType)
{
case TextureType.OneD:
case TextureType.TwoD:
GL.TexImage2D(GLenum.Texture2D, mip, (int)glformat, width, height, 0, glformat, dataType, new IntPtr());
GLES2Config.GlCheckError(this);
break;
case TextureType.CubeMap:
for (int face = 0; face < 6; face++)
{
GL.TexImage2D(GLenum.TextureCubeMapPositiveX + face, mip, (int)glformat, width, height, 0, glformat, dataType, new IntPtr());
GLES2Config.GlCheckError(this);
}
break;
case TextureType.ThreeD:
default:
break;
}
if (width > 1)
{
width /= 2;
}
if (height > 1)
{
height /= 2;
}
}
}
this.CreateSurfaceList();
//Get final internal format
base.format = this.GetBuffer(0, 0).Format;
}
public override void BlitFromMemory(PixelBox src, BasicBox dstBox)
{
// Fall back to normal GLHardwarePixelBuffer::blitFromMemory in case
// - FBO is not supported
// - Either source or target is luminance due doesn't looks like supported by hardware
// - the source dimensions match the destination ones, in which case no scaling is needed
//Ogre TODO: Check that extension is NOT available
if (PixelUtil.IsLuminance(src.Format) || PixelUtil.IsLuminance(this.format) || (src.Width == dstBox.Width && src.Height == dstBox.Height && src.Depth == dstBox.Depth))
{
base.BlitFromMemory(src, dstBox);
return;
}
if (!Buffer.Contains(dstBox))
{
throw new ArgumentOutOfRangeException("dstBox", "Destination box out of range");
}
//For scoped deletion of conversion buffer
PixelBox srcPB;
BufferBase buf;
//first, convert the srcbox to a OpenGL compatible pixel format
if (GLES2PixelUtil.GetGLOriginFormat(src.Format) == 0)
{
//Conver to buffer intenral format
buf = BufferBase.Wrap(new byte[PixelUtil.GetMemorySize(src.Width, src.Height, src.Depth, this.format)]);
srcPB = new PixelBox(src.Width, src.Height, src.Depth, this.format, buf);
PixelConverter.BulkPixelConversion(src, srcPB);
}
else
{
//No conversion needed
srcPB = src;
}
//Create temporary texture to store source data
int id = 0;
All target = All.Texture2D;
int width = GLES2PixelUtil.OptionalPO2(src.Width);
int height = GLES2PixelUtil.OptionalPO2(src.Height);
All format = GLES2PixelUtil.GetClosestGLInternalFormat(src.Format);
All datatype = GLES2PixelUtil.GetGLOriginDataType(src.Format);
//Generate texture name
GL.GenTextures(1, ref id);
GLES2Config.GlCheckError(this);
//Set texture type
GL.BindTexture(target, id);
GLES2Config.GlCheckError(this);
//Allocate texture memory
GL.TexImage2D(target, 0, (int)format, width, height, 0, format, datatype, IntPtr.Zero);
GLES2Config.GlCheckError(this);
var tex = new GLES2TextureBuffer(string.Empty, target, id, width, height, format, (All)src.Format, 0, 0, BufferUsage.StaticWriteOnly, false, false, 0);
//Upload data to 0,0,0 in temprary texture
var tempTarget = new BasicBox(0, 0, 0, srcPB.Width, srcPB.Height, srcPB.Depth);
tex.Upload(srcPB, tempTarget);
//Blit
this.BlitFromTexture(tex, tempTarget, dstBox);
GLES2Config.GlCheckError(this);
}
protected override void Download(PixelBox data)
{
#if GL_NV_get_tex_image
if (data.Width != Width || data.Height != Height || data.Depth != Depth)
{
throw new Core.AxiomException("only download of entire buffer is supported by GL");
}
GL.BindTexture(this.target, this.textureID);
if (PixelUtil.IsCompressed(data.Format))
{
if (data.Format != format || !data.IsConsecutive)
{
throw new Core.AxiomException("Compressed images must be consecutive, in the source format");
}
GL.GetCompressedTexImageNV(this.faceTarget, this.level, data.Data);
}
else
{
if ((data.Width * PixelUtil.GetNumElemBytes(data.Format) & 3) != 0)
{
//Standard alignment of 4 is not right
GL.PixelStore(Glenum.PackAlignment, 1);
}
//We can only get the entire texture
GL.GetTexImageNV(this.faceTarget, this.level, GLES2PixelUtil.GetGLOriginFormat(data.Format), GLES2PixelUtil.GetGLOriginDataType(data.Format), data.Data);
//Restore defaults
GL.PixelStore(Glenum.PackAlignment, 4);
}
#else
throw new Core.AxiomException("Downloading texture buffers is not supported by OpenGL ES");
#endif
}
protected override void Upload(PixelBox data, BasicBox dest)
{
GL.BindTexture(this.target, this.textureID);
GLES2Config.GlCheckError(this);
if (PixelUtil.IsCompressed(data.Format))
{
if (data.Format != format || !data.IsConsecutive)
{
var glFormat = GLES2PixelUtil.GetClosestGLInternalFormat(format);
//Data must be consecutive and at beginning of buffer as PixelStore is not allowed
//for compressed formats
if (dest.Left == 0 && dest.Top == 0)
{
GL.CompressedTexImage2D(this.faceTarget, this.level, glFormat, dest.Width, dest.Height, 0, data.ConsecutiveSize, data.Data.Pin());
GLES2Config.GlCheckError(this);
}
else
{
GL.CompressedTexSubImage2D(this.faceTarget, this.level, dest.Left, dest.Top, dest.Width, dest.Height, glFormat, data.ConsecutiveSize, data.Data.Pin());
GLES2Config.GlCheckError(this);
}
}
}
else if (this.softwareMipmap)
{
if (data.Width != data.RowPitch)
{
//Ogre TODO
throw new Core.AxiomException("Unsupported texture format");
}
if (data.Height * data.Width != data.SlicePitch)
{
//Ogre TODO
throw new Core.AxiomException("Unsupported texture format");
}
GL.PixelStore(All.UnpackAlignment, 1);
GLES2Config.GlCheckError(this);
this.BuildMipmaps(data);
}
else
{
if (data.Width != data.RowPitch)
{
//Ogre TODO
throw new Core.AxiomException("Unsupported texture format");
}
if (data.Height * data.Width != data.SlicePitch)
{
//Ogre TODO
throw new Core.AxiomException("Unsupported texture format");
}
if ((data.Width * PixelUtil.GetNumElemBytes(data.Format) & 3) != 0)
{
//Standard alignment of 4 is not right
GL.PixelStore(All.UnpackAlignment, 1);
GLES2Config.GlCheckError(this);
}
var dataPtr = data.Data.Pin();
GL.TexImage2D(this.faceTarget, this.level, (int)GLES2PixelUtil.GetClosestGLInternalFormat(data.Format), data.Width, data.Height, 0, GLES2PixelUtil.GetGLOriginFormat(data.Format), GLES2PixelUtil.GetGLOriginDataType(data.Format), dataPtr);
//GL.TexSubImage2D( this.faceTarget, this.level, dest.Left, dest.Top, dest.Width, dest.Height, GLES2PixelUtil.GetGLOriginFormat( data.Format ), GLES2PixelUtil.GetGLOriginDataType( data.Format ), dataPtr );
data.Data.UnPin();
GLES2Config.GlCheckError(this);
}
GL.PixelStore(All.UnpackAlignment, 4);
GLES2Config.GlCheckError(this);
}
/// <summary>
/// Detect which internal formats are allowed as RTT Also detect what combinations of stencil and depth are allowed with this interal format.
/// </summary>
private void DetectFBOFormats()
{
//Try all formats, and report which ones work as target
int fb = 0, tid = 0;
GLenum target = GLenum.Texture2D;
for (int x = 0; x < (int)PixelFormat.Count; x++)
{
this.props[x].Valid = false;
//Fetch gl format token
var fmt = GLES2PixelUtil.GetGLInternalFormat((PixelFormat)x);
if ((fmt == GLenum.None) && (x != 0))
{
continue;
}
//No test for compressed formats
if (PixelUtil.IsCompressed((PixelFormat)x))
{
continue;
}
//Create and attach framebuffer
GL.GenFramebuffers(1, ref fb);
GL.BindFramebuffer(GLenum.Framebuffer, fb);
if (fmt != GLenum.None)
{
//Create and attach texture
GL.GenTextures(1, ref tid);
GL.BindTexture(target, tid);
//Set some default parameters
GL.TexParameter(target, GLenum.TextureMinFilter, (int)GLenum.Nearest);
GL.TexParameter(target, GLenum.TextureMagFilter, (int)GLenum.Nearest);
GL.TexParameter(target, GLenum.TextureWrapS, (int)GLenum.ClampToEdge);
GL.TexParameter(target, GLenum.TextureWrapT, (int)GLenum.ClampToEdge);
GL.TexImage2D(target, 0, (int)fmt, PROBE_SIZE, PROBE_SIZE, 0, fmt, GLES2PixelUtil.GetGLOriginDataType((PixelFormat)x), IntPtr.Zero);
GL.FramebufferTexture2D(GLenum.Framebuffer, GLenum.ColorAttachment0, target, tid, 0);
}
//Check status
GLenum status = GL.CheckFramebufferStatus(GLenum.Framebuffer);
// 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 == GLenum.None || status == GLenum.FramebufferComplete)
{
this.props[x].Valid = true;
var sb = new StringBuilder();
sb.Append("FBO " + PixelUtil.GetFormatName((PixelFormat)x) + " depth/stencil support: ");
//For each depth/stencil formats
for (int depth = 0; depth < DepthFormatCount; depth++)
{
if (depthFormats[depth] != GLenum.Depth24Stencil8Oes)
{
//General depth/stencil combination
for (int stencil = 0; stencil < StencilFormatCount; stencil++)
{
if (this.TryFormat(depthFormats[depth], stencilFormats[stencil]))
{
//Add mode to allowed modes
sb.Append("D" + depthBits[depth] + "S" + stencilBits[stencil] + " ");
var mode = new FormatProperties.Mode();
mode.Depth = depth;
mode.Stencil = stencil;
this.props[x].Modes.Add(mode);
}
}
}
else
{
//Packed depth/stencil format
if (this.TryPackedFormat(depthFormats[depth]))
{
//Add mode to allowed modes
sb.Append("Packed-D" + depthBits[depth] + "S" + 8 + " ");
var mode = new FormatProperties.Mode();
mode.Depth = depth;
mode.Stencil = 0; //unuse
this.props[x].Modes.Add(mode);
}
}
}
Core.LogManager.Instance.Write(sb.ToString());
}
//Delte texture and framebuffer
GL.BindFramebuffer(GLenum.Framebuffer, 0);
GL.DeleteFramebuffers(1, ref fb);
if (fmt != GLenum.None)
{
GL.DeleteTextures(1, ref tid);
}
}
// Clear any errors
GLES2Config.GlClearError();
string fmtstring = string.Empty;
for (int x = 0; x < (int)PixelFormat.Count; x++)
{
if (this.props[x].Valid)
{
fmtstring += PixelUtil.GetFormatName((PixelFormat)x) + " ";
}
Core.LogManager.Instance.Write("[GLES2] : Valid FBO targets " + fmtstring);
}
}