public BlockLinearLayout(
int width,
int height,
int depth,
int gobBlocksInY,
int gobBlocksInZ,
int bpp)
{
_texBpp = bpp;
_bppShift = BitUtils.CountTrailingZeros32(bpp);
_bhMask = gobBlocksInY - 1;
_bdMask = gobBlocksInZ - 1;
_bhShift = BitUtils.CountTrailingZeros32(gobBlocksInY);
_bdShift = BitUtils.CountTrailingZeros32(gobBlocksInZ);
_xShift = BitUtils.CountTrailingZeros32(GobSize * gobBlocksInY * gobBlocksInZ);
RobAndSliceSizes rsSizes = GetRobAndSliceSizes(width, height, gobBlocksInY, gobBlocksInZ);
_robSize = rsSizes.RobSize;
_sliceSize = rsSizes.SliceSize;
}
public int GetMipOffset(int level)
{
int totalSize = 0;
for (int index = 0; index < level; index++)
{
int width = Math.Max(1, _texWidth >> index);
int height = Math.Max(1, _texHeight >> index);
int depth = Math.Max(1, _texDepth >> index);
GobBlockSizes gbSizes = AdjustGobBlockSizes(height, depth);
RobAndSliceSizes rsSizes = GetRobAndSliceSizes(width, height, gbSizes);
totalSize += BitUtils.DivRoundUp(depth, gbSizes.Depth) * rsSizes.SliceSize;
}
return(totalSize);
}
public void SetMipLevel(int level)
{
_baseOffset = GetMipOffset(level);
int width = Math.Max(1, _texWidth >> level);
int height = Math.Max(1, _texHeight >> level);
int depth = Math.Max(1, _texDepth >> level);
GobBlockSizes gbSizes = AdjustGobBlockSizes(height, depth);
_bhMask = gbSizes.Height - 1;
_bdMask = gbSizes.Depth - 1;
_bhShift = BitUtils.CountTrailingZeros32(gbSizes.Height);
_bdShift = BitUtils.CountTrailingZeros32(gbSizes.Depth);
_xShift = BitUtils.CountTrailingZeros32(GobSize * gbSizes.Height * gbSizes.Depth);
RobAndSliceSizes gsSizes = GetRobAndSliceSizes(width, height, gbSizes);
_robSize = gsSizes.RobSize;
_sliceSize = gsSizes.SliceSize;
}