/// <summary>
/// Tries to find an existing texture matching the given buffer copy destination. If none is found, returns null.
/// </summary>
/// <param name="memoryManager">GPU memory manager where the texture is mapped</param>
/// <param name="tex">The texture information</param>
/// <param name="gpuVa">GPU virtual address of the texture</param>
/// <param name="bpp">Bytes per pixel</param>
/// <param name="stride">If <paramref name="linear"/> is true, should have the texture stride, otherwise ignored</param>
/// <param name="xCount">Number of pixels to be copied per line</param>
/// <param name="yCount">Number of lines to be copied</param>
/// <param name="linear">True if the texture has a linear layout, false otherwise</param>
/// <returns>A matching texture, or null if there is no match</returns>
public Texture FindTexture(
MemoryManager memoryManager,
CopyBufferTexture tex,
ulong gpuVa,
int bpp,
int stride,
int xCount,
int yCount,
bool linear)
{
ulong address = memoryManager.Translate(gpuVa);
if (address == MemoryManager.PteUnmapped)
{
return(null);
}
int addressMatches = _textures.FindOverlaps(address, ref _textureOverlaps);
for (int i = 0; i < addressMatches; i++)
{
Texture texture = _textureOverlaps[i];
FormatInfo format = texture.Info.FormatInfo;
if (texture.Info.DepthOrLayers > 1)
{
continue;
}
bool match;
if (linear)
{
// Size is not available for linear textures. Use the stride and end of the copy region instead.
match = texture.Info.IsLinear && texture.Info.Stride == stride && tex.RegionY + yCount <= texture.Info.Height;
}
else
{
// Bpp may be a mismatch between the target texture and the param.
// Due to the way linear strided and block layouts work, widths can be multiplied by Bpp for comparison.
// Note: tex.Width is the aligned texture size. Prefer param.XCount, as the destination should be a texture with that exact size.
bool sizeMatch = xCount * bpp == texture.Info.Width * format.BytesPerPixel && tex.Height == texture.Info.Height;
bool formatMatch = !texture.Info.IsLinear &&
texture.Info.GobBlocksInY == tex.MemoryLayout.UnpackGobBlocksInY() &&
texture.Info.GobBlocksInZ == tex.MemoryLayout.UnpackGobBlocksInZ();
match = sizeMatch && formatMatch;
}
if (match)
{
return(texture);
}
}
return(null);
}
/// <summary>
/// Determine if a buffer-to-texture region covers the entirety of a texture.
/// </summary>
/// <param name="cbp">Copy command parameters</param>
/// <param name="tex">Texture to compare</param>
/// <param name="linear">True if the texture is linear, false if block linear</param>
/// <param name="stride">Texture stride</param>
/// <returns></returns>
private bool IsTextureCopyComplete(CopyBufferParams cbp, CopyBufferTexture tex, bool linear, int stride)
{
if (linear)
{
return(tex.RegionX == 0 &&
tex.RegionY == 0 &&
stride == BitUtils.AlignUp(cbp.XCount, StrideAlignment));
}
else
{
return(tex.RegionX == 0 &&
tex.RegionY == 0 &&
tex.Width == BitUtils.AlignUp(cbp.XCount, GobAlignment) &&
tex.Height == cbp.YCount);
}
}
/// <summary>
/// Determine if a buffer-to-texture region covers the entirety of a texture.
/// </summary>
/// <param name="cbp">Copy command parameters</param>
/// <param name="tex">Texture to compare</param>
/// <param name="linear">True if the texture is linear, false if block linear</param>
/// <param name="bpp">Texture bytes per pixel</param>
/// <param name="stride">Texture stride</param>
/// <returns></returns>
private bool IsTextureCopyComplete(CopyBufferParams cbp, CopyBufferTexture tex, bool linear, int bpp, int stride)
{
if (linear)
{
int alignWidth = Constants.StrideAlignment / bpp;
return(tex.RegionX == 0 &&
tex.RegionY == 0 &&
stride / bpp == BitUtils.AlignUp(cbp.XCount, alignWidth));
}
else
{
int alignWidth = Constants.GobAlignment / bpp;
return(tex.RegionX == 0 &&
tex.RegionY == 0 &&
tex.Width == BitUtils.AlignUp(cbp.XCount, alignWidth) &&
tex.Height == cbp.YCount);
}
}
