/// <summary>
/// Determines if data is compatible between the source and destination texture.
/// The two textures must have the same size, layout, and bytes per pixel.
/// </summary>
/// <param name="lhs">Info for the first texture</param>
/// <param name="rhs">Info for the second texture</param>
/// <param name="lhsFormat">Format of the first texture</param>
/// <param name="rhsFormat">Format of the second texture</param>
/// <returns>True if the data is compatible, false otherwise</returns>
private bool IsDataCompatible(TwodTexture lhs, TwodTexture rhs, FormatInfo lhsFormat, FormatInfo rhsFormat)
{
if (lhsFormat.BytesPerPixel != rhsFormat.BytesPerPixel ||
lhs.Height != rhs.Height ||
lhs.Depth != rhs.Depth ||
lhs.LinearLayout != rhs.LinearLayout ||
lhs.MemoryLayout.Packed != rhs.MemoryLayout.Packed)
{
return(false);
}
if (lhs.LinearLayout)
{
return(lhs.Stride == rhs.Stride);
}
else
{
return(lhs.Width == rhs.Width);
}
}
/// <summary>
/// Determine if the given region covers the full texture, also considering width alignment.
/// </summary>
/// <param name="texture">The texture to check</param>
/// <param name="formatInfo"></param>
/// <param name="x1">Region start x</param>
/// <param name="y1">Region start y</param>
/// <param name="x2">Region end x</param>
/// <param name="y2">Region end y</param>
/// <returns>True if the region covers the full texture, false otherwise</returns>
private bool IsCopyRegionComplete(TwodTexture texture, FormatInfo formatInfo, int x1, int y1, int x2, int y2)
{
if (x1 != 0 || y1 != 0 || y2 != texture.Height)
{
return(false);
}
int width;
int widthAlignment;
if (texture.LinearLayout)
{
widthAlignment = 1;
width = texture.Stride / formatInfo.BytesPerPixel;
}
else
{
widthAlignment = Constants.GobAlignment / formatInfo.BytesPerPixel;
width = texture.Width;
}
return(width == BitUtils.AlignUp(x2, widthAlignment));
}
/// <summary>
/// Performs a full data copy between two textures, reading and writing guest memory directly.
/// The textures must have a matching layout, size, and bytes per pixel.
/// </summary>
/// <param name="src">The source texture</param>
/// <param name="dst">The destination texture</param>
/// <param name="w">Copy width</param>
/// <param name="h">Copy height</param>
/// <param name="bpp">Bytes per pixel</param>
private void UnscaledFullCopy(TwodTexture src, TwodTexture dst, int w, int h, int bpp)
{
var srcCalculator = new OffsetCalculator(
w,
h,
src.Stride,
src.LinearLayout,
src.MemoryLayout.UnpackGobBlocksInY(),
src.MemoryLayout.UnpackGobBlocksInZ(),
bpp);
(int _, int srcSize) = srcCalculator.GetRectangleRange(0, 0, w, h);
var memoryManager = _channel.MemoryManager;
ulong srcGpuVa = src.Address.Pack();
ulong dstGpuVa = dst.Address.Pack();
ReadOnlySpan <byte> srcSpan = memoryManager.GetSpan(srcGpuVa, srcSize, true);
int width;
int height = src.Height;
if (src.LinearLayout)
{
width = src.Stride / bpp;
}
else
{
width = src.Width;
}
// If the copy is not equal to the width and height of the texture, we will need to copy partially.
// It's worth noting that it has already been established that the src and dst are the same size.
if (w == width && h == height)
{
memoryManager.Write(dstGpuVa, srcSpan);
}
else
{
using WritableRegion dstRegion = memoryManager.GetWritableRegion(dstGpuVa, srcSize, true);
Span <byte> dstSpan = dstRegion.Memory.Span;
if (src.LinearLayout)
{
int stride = src.Stride;
int offset = 0;
int lineSize = width * bpp;
for (int y = 0; y < height; y++)
{
srcSpan.Slice(offset, lineSize).CopyTo(dstSpan.Slice(offset));
offset += stride;
}
}
else
{
// Copy with the block linear layout in mind.
// Recreate the offset calculate with bpp 1 for copy.
int stride = w * bpp;
srcCalculator = new OffsetCalculator(
stride,
h,
0,
false,
src.MemoryLayout.UnpackGobBlocksInY(),
src.MemoryLayout.UnpackGobBlocksInZ(),
1);
int strideTrunc = BitUtils.AlignDown(stride, 16);
ReadOnlySpan <Vector128 <byte> > srcVec = MemoryMarshal.Cast <byte, Vector128 <byte> >(srcSpan);
Span <Vector128 <byte> > dstVec = MemoryMarshal.Cast <byte, Vector128 <byte> >(dstSpan);
for (int y = 0; y < h; y++)
{
int x = 0;
srcCalculator.SetY(y);
for (; x < strideTrunc; x += 16)
{
int offset = srcCalculator.GetOffset(x) >> 4;
dstVec[offset] = srcVec[offset];
}
for (; x < stride; x++)
{
int offset = srcCalculator.GetOffset(x);
dstSpan[offset] = srcSpan[offset];
}
}
}
}
}