public override void BlitToMemory(Media.BasicBox srcBox, Media.PixelBox dst)
{
if (!this.Buffer.Contains(srcBox))
{
throw new ArgumentOutOfRangeException("srcBox", "source box out of range.");
}
if (srcBox.Left == 0 && srcBox.Right == width && srcBox.Top == 0 && srcBox.Bottom == height && srcBox.Front == 0 && srcBox.Back == depth && dst.Width == width && dst.Height == height && dst.Depth == depth && GLES2PixelUtil.GetGLOriginFormat(dst.Format) != 0)
{
//The direct case: the user wants the entire texture in a format supported by GL
//so we don't need an intermediate buffer
this.Download(dst);
}
else
{
//Use buffer for intermediate copy
this.AllocateBuffer();
//Download entire buffer
this.Download(this.Buffer);
if (srcBox.Width != dst.Width || srcBox.Height != dst.Height || srcBox.Depth != dst.Depth)
{
//We need scaling
Image.Scale(this.Buffer.GetSubVolume(srcBox), dst, ImageFilter.Bilinear);
}
else
{
//Just copy the bit that we need
PixelConverter.BulkPixelConversion(this.Buffer.GetSubVolume(srcBox), dst);
}
this.FreeBuffer();
}
}
public override void BlitFromMemory(Media.PixelBox src, Media.BasicBox dstBox)
{
if (this.Buffer.Contains(dstBox) == false)
{
throw new ArgumentOutOfRangeException("dstBox", "Destination box out of range");
}
PixelBox scaled;
if (src.Width != dstBox.Width || src.Height != dstBox.Height || src.Depth != dstBox.Depth)
{
//Scale to destination size
//This also does pixel format conversion if needed
this.AllocateBuffer();
scaled = this.Buffer.GetSubVolume(dstBox);
Image.Scale(src, scaled, ImageFilter.Bilinear);
}
else if ((src.Format != format) || ((GLES2PixelUtil.GetGLOriginFormat(src.Format) == 0) && (src.Format != PixelFormat.R8G8B8)))
{
//Extents match, but format is not accepted as valid source format for GL
//do conversion in temporary buffer
this.AllocateBuffer();
scaled = this.Buffer.GetSubVolume(dstBox);
PixelConverter.BulkPixelConversion(src, scaled);
if (src.Format == PixelFormat.A4R4G4B4)
{
// ARGB->BGRA
GLES2PixelUtil.ConvertToGLFormat(ref scaled, ref scaled);
}
}
else
{
this.AllocateBuffer();
scaled = src.Clone();
if (src.Format == PixelFormat.R8G8B8)
{
scaled.Format = PixelFormat.B8G8R8;
PixelConverter.BulkPixelConversion(src, scaled);
}
}
this.Upload(scaled, dstBox);
this.FreeBuffer();
}
