/// <summary>
/// Tries to find an existing texture, or create a new one if not found.
/// </summary>
/// <param name="colorState">Color buffer texture to find or create</param>
/// <param name="samplesInX">Number of samples in the X direction, for MSAA</param>
/// <param name="samplesInY">Number of samples in the Y direction, for MSAA</param>
/// <returns>The texture</returns>
public Texture FindOrCreateTexture(RtColorState colorState, int samplesInX, int samplesInY)
{
ulong address = _context.MemoryManager.Translate(colorState.Address.Pack());
if (address == MemoryManager.BadAddress)
{
return(null);
}
bool isLinear = colorState.MemoryLayout.UnpackIsLinear();
int gobBlocksInY = colorState.MemoryLayout.UnpackGobBlocksInY();
int gobBlocksInZ = colorState.MemoryLayout.UnpackGobBlocksInZ();
Target target;
if (colorState.MemoryLayout.UnpackIsTarget3D())
{
target = Target.Texture3D;
}
else if ((samplesInX | samplesInY) != 1)
{
target = colorState.Depth > 1
? Target.Texture2DMultisampleArray
: Target.Texture2DMultisample;
}
else
{
target = colorState.Depth > 1
? Target.Texture2DArray
: Target.Texture2D;
}
FormatInfo formatInfo = colorState.Format.Convert();
int width, stride;
// For linear textures, the width value is actually the stride.
// We can easily get the width by dividing the stride by the bpp,
// since the stride is the total number of bytes occupied by a
// line. The stride should also meet alignment constraints however,
// so the width we get here is the aligned width.
if (isLinear)
{
width = colorState.WidthOrStride / formatInfo.BytesPerPixel;
stride = colorState.WidthOrStride;
}
else
{
width = colorState.WidthOrStride;
stride = 0;
}
TextureInfo info = new TextureInfo(
address,
width,
colorState.Height,
colorState.Depth,
1,
samplesInX,
samplesInY,
stride,
isLinear,
gobBlocksInY,
gobBlocksInZ,
1,
target,
formatInfo);
Texture texture = FindOrCreateTexture(info, TextureSearchFlags.WithUpscale);
texture.SynchronizeMemory();
return(texture);
}
/// <summary>
/// Gets a texture creation information from texture information.
/// This can be used to create new host textures.
/// </summary>
/// <param name="info">Texture information</param>
/// <param name="caps">GPU capabilities</param>
/// <param name="scale">Texture scale factor, to be applied to the texture size</param>
/// <returns>The texture creation information</returns>
public static TextureCreateInfo GetCreateInfo(TextureInfo info, Capabilities caps, float scale)
{
FormatInfo formatInfo = TextureCompatibility.ToHostCompatibleFormat(info, caps);
if (info.Target == Target.TextureBuffer)
{
// We assume that the host does not support signed normalized format
// (as is the case with OpenGL), so we just use a unsigned format.
// The shader will need the appropriate conversion code to compensate.
switch (formatInfo.Format)
{
case Format.R8Snorm:
formatInfo = new FormatInfo(Format.R8Sint, 1, 1, 1, 1);
break;
case Format.R16Snorm:
formatInfo = new FormatInfo(Format.R16Sint, 1, 1, 2, 1);
break;
case Format.R8G8Snorm:
formatInfo = new FormatInfo(Format.R8G8Sint, 1, 1, 2, 2);
break;
case Format.R16G16Snorm:
formatInfo = new FormatInfo(Format.R16G16Sint, 1, 1, 4, 2);
break;
case Format.R8G8B8A8Snorm:
formatInfo = new FormatInfo(Format.R8G8B8A8Sint, 1, 1, 4, 4);
break;
case Format.R16G16B16A16Snorm:
formatInfo = new FormatInfo(Format.R16G16B16A16Sint, 1, 1, 8, 4);
break;
}
}
int width = info.Width / info.SamplesInX;
int height = info.Height / info.SamplesInY;
int depth = info.GetDepth() * info.GetLayers();
if (scale != 1f)
{
width = (int)MathF.Ceiling(width * scale);
height = (int)MathF.Ceiling(height * scale);
}
return(new TextureCreateInfo(
width,
height,
depth,
info.Levels,
info.Samples,
formatInfo.BlockWidth,
formatInfo.BlockHeight,
formatInfo.BytesPerPixel,
formatInfo.Format,
info.DepthStencilMode,
info.Target,
info.SwizzleR,
info.SwizzleG,
info.SwizzleB,
info.SwizzleA));
}
/// <summary>
/// Try getting the texture format from an encoded format integer from the Maxwell texture descriptor.
/// </summary>
/// <param name="encoded">The encoded format integer from the texture descriptor</param>
/// <param name="isSrgb">Indicates if the format is a sRGB format</param>
/// <param name="format">The output texture format</param>
/// <returns>True if the format is valid, false otherwise</returns>
public static bool TryGetTextureFormat(uint encoded, bool isSrgb, out FormatInfo format)
{
encoded |= (isSrgb ? 1u << 19 : 0u);
return(_textureFormats.TryGetValue(encoded, out format));
}
/// <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,
DmaTexture 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);
Texture textureMatch = null;
for (int i = 0; i < addressMatches; i++)
{
Texture texture = _textureOverlaps[i];
FormatInfo format = texture.Info.FormatInfo;
if (texture.Info.DepthOrLayers > 1 || texture.Info.Levels > 1 || texture.Info.FormatInfo.IsCompressed)
{
// Don't support direct buffer copies to anything that isn't a single 2D image, uncompressed.
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)
{
if (textureMatch == null)
{
textureMatch = texture;
}
else if (texture.Group != textureMatch.Group)
{
return(null); // It's ambiguous which texture should match between multiple choices, so leave it up to the slow path.
}
}
}
return(textureMatch);
}
