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);
}