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import io
from PyQt6.QtCore import QCoreApplication, qCritical, QFile, QIODeviceBase
from PyQt6.QtOpenGL import QOpenGLTexture
from . import DDSDefinitions
from .glstuff import GLTextureFormat
class DDSReadException(Exception):
"""Thrown if there was an error reading a DDS file"""
pass
ddsCubemapFaces = {
DDSDefinitions.DDS_HEADER.Caps2.DDSCAPS2_CUBEMAP_POSITIVEX: QOpenGLTexture.CubeMapFace.CubeMapPositiveX,
DDSDefinitions.DDS_HEADER.Caps2.DDSCAPS2_CUBEMAP_NEGATIVEX: QOpenGLTexture.CubeMapFace.CubeMapNegativeX,
DDSDefinitions.DDS_HEADER.Caps2.DDSCAPS2_CUBEMAP_POSITIVEY: QOpenGLTexture.CubeMapFace.CubeMapPositiveY,
DDSDefinitions.DDS_HEADER.Caps2.DDSCAPS2_CUBEMAP_NEGATIVEY: QOpenGLTexture.CubeMapFace.CubeMapNegativeY,
DDSDefinitions.DDS_HEADER.Caps2.DDSCAPS2_CUBEMAP_POSITIVEZ: QOpenGLTexture.CubeMapFace.CubeMapPositiveZ,
DDSDefinitions.DDS_HEADER.Caps2.DDSCAPS2_CUBEMAP_NEGATIVEZ: QOpenGLTexture.CubeMapFace.CubeMapNegativeZ}
class DDSFile:
def __init__(self, fileData: bytes, fileName: str):
self.fileName = fileName
self.header = DDSDefinitions.DDS_HEADER()
self.dxt10Header = None
self.glFormat: GLTextureFormat = None
self.fileData = fileData
self.data = None
self.isCubemap = None
@classmethod
def fromFile(cls, fileName: str):
file = QFile(fileName)
if file.open(QIODeviceBase.OpenModeFlag.ReadOnly):
fileData = file.readAll()
else:
raise DDSReadException()
return cls(fileData.data(), fileName)
def load(self):
with io.BytesIO(self.fileData) as file:
magicNumber = file.read(4)
if magicNumber != DDSDefinitions.DDS_MAGIC_NUMBER:
qCritical(self.tr("Magic number mismatch."))
raise DDSReadException()
self.header.fromStream(file)
if self.header.ddspf.dwFlags & DDSDefinitions.DDS_PIXELFORMAT.Flags.DDPF_FOURCC:
fourCC = self.header.ddspf.dwFourCC
if fourCC == b"DX10":
self.dxt10Header = DDSDefinitions.DDS_HEADER_DXT10()
self.dxt10Header.fromStream(file)
else:
fourCC = None
self.glFormat = DDSDefinitions.getGLFormat(self.header.ddspf, self.dxt10Header)
self.data = []
# Do this once per layer/mip level whatever, (times one per scanline if uncompressed). Also, potentially recompute this based on the format and size in case writers lie.
# self.data.append(file.read(self.header.dwPitchOrLinearSize))
layerCount = 1
if self.header.dwCaps2 & DDSDefinitions.DDS_HEADER.Caps2.DDSCAPS2_CUBEMAP:
self.isCubemap = True
layerCount = 0
for face in ddsCubemapFaces:
if self.header.dwCaps2 & face:
layerCount += 1
else:
self.isCubemap = False
for layer in range(layerCount):
nextWidth = self.header.dwWidth
nextHeight = self.header.dwHeight
mipCount = self.mipLevels()
for level in range(mipCount):
if self.header.ddspf.dwFlags & (
DDSDefinitions.DDS_PIXELFORMAT.Flags.DDPF_ALPHA | DDSDefinitions.DDS_PIXELFORMAT.Flags.DDPF_RGB | DDSDefinitions.DDS_PIXELFORMAT.Flags.DDPF_YUV | DDSDefinitions.DDS_PIXELFORMAT.Flags.DDPF_LUMINANCE):
size = nextWidth * nextHeight * ((self.header.ddspf.dwRGBBitCount + 7) // 8)
elif fourCC:
if self.dxt10Header:
dxgiFormat = self.dxt10Header.dxgiFormat
else:
dxgiFormat = DDSDefinitions.fourCCToDXGI(fourCC)
size = DDSDefinitions.sizeFromFormat(dxgiFormat, nextWidth, nextHeight)
self.data.append(file.read(size))
nextWidth = max(nextWidth // 2, 1)
nextHeight = max(nextHeight // 2, 1)
def getDescription(self):
format = ""
# DX10 header says the format enum
if self.dxt10Header is not None:
format = self.dxt10Header.dxgiFormat.name.replace("DXGI_FORMAT_", "")
# Pixel Format says the FourCC
elif self.header.ddspf.dwFlags & DDSDefinitions.DDS_PIXELFORMAT.Flags.DDPF_FOURCC:
fourCC = self.header.ddspf.dwFourCC
format = self.tr("{0} (equivalent to {1})").format(fourCC.decode('ascii'),
DDSDefinitions.fourCCToDXGI(fourCC).name.replace(
"DXGI_FORMAT_", ""))
# We've got bitmasks for the colour channels
else:
# This could be prettier if there was logic to detect that certain common bitmasks represented things more easily represented, like RGBA8
if self.header.ddspf.dwFlags & (
DDSDefinitions.DDS_PIXELFORMAT.Flags.DDPF_RGB | DDSDefinitions.DDS_PIXELFORMAT.Flags.DDPF_YUV):
format += self.tr("Red bitmask {0}, Green bitmask {1}, Blue bitmask {2}").format(
self.header.ddspf.dwRBitMask.hex().upper(), self.header.ddspf.dwGBitMask.hex().upper(),
self.header.ddspf.dwBBitMask.hex().upper())
if self.header.ddspf.dwFlags & DDSDefinitions.DDS_PIXELFORMAT.Flags.DDPF_LUMINANCE:
if format != "":
format += ", "
format += self.tr("Luminance bitmask {0}").format(self.header.ddspf.dwRBitMask.hex().upper())
if self.header.ddspf.dwFlags & (
DDSDefinitions.DDS_PIXELFORMAT.Flags.DDPF_ALPHA | DDSDefinitions.DDS_PIXELFORMAT.Flags.DDPF_ALPHAPIXELS):
if format != "":
format += ", "
format += self.tr("Alpha bitmask {0}").format(self.header.ddspf.dwABitMask.hex().upper())
size = self.tr("{0}×{1}").format(self.header.dwWidth, self.header.dwHeight)
dimensions = self.tr("Cubemap") if self.isCubemap else self.tr("2D")
mipmaps = self.tr("Mipmapped") if self.mipLevels() != 1 else self.tr("No mipmaps")
return self.tr("{0}, {1} {2}, {3}").format(format, size, dimensions, mipmaps)
def mipLevels(self):
if self.header.dwFlags & DDSDefinitions.DDS_HEADER.Flags.DDSD_MIPMAPCOUNT:
return self.header.dwMipMapCount
else:
return 1
def asQOpenGLTexture(self, gl, context):
if not self.data:
return
if self.glFormat.requirements:
minVersion, extensions = self.glFormat.requirements
glVersion = (gl.glGetIntegerv(gl.GL_MAJOR_VERSION), gl.glGetIntegerv(gl.GL_MINOR_VERSION))
if glVersion < minVersion or minVersion < (1, 0):
compatible = False
for extension in extensions:
if context.hasExtension(extension):
compatible = True
break
if not compatible:
qCritical(self.tr("OpenGL driver incompatible with texture format."))
return None
if self.header.dwCaps2 & DDSDefinitions.DDS_HEADER.Caps2.DDSCAPS2_CUBEMAP:
texture = QOpenGLTexture(QOpenGLTexture.Target.TargetCubeMap)
if self.header.dwWidth != self.header.dwHeight:
qCritical(self.tr("Cubemap faces must be square"))
return None
else:
# Assume GL_TEXTURE_2D for now
texture = QOpenGLTexture(QOpenGLTexture.Target.Target2D)
# Assume single layer for now
# self.texture.setLayers(1)
mipCount = self.mipLevels()
texture.setAutoMipMapGenerationEnabled(False)
texture.setMipLevels(mipCount)
texture.setMipLevelRange(0, mipCount - 1)
texture.setSize(self.header.dwWidth, self.header.dwHeight)
texture.setFormat(QOpenGLTexture.TextureFormat(self.glFormat.internalFormat))
texture.allocateStorage()
if self.header.dwCaps2 & DDSDefinitions.DDS_HEADER.Caps2.DDSCAPS2_CUBEMAP:
# Lisa hasn't whipped David Wang into shape yet. At least there are fewer bugs than under Raja.
# The specific bug has been reported and AMD "will try to reproduce it soon"
# MO 2.5.0: Radeon-specific code is causing crashing on the latest drivers
# Some cubemaps fail to render with or without these modifications
# noDSA = "Radeon" in gl.glGetString(gl.GL_RENDERER) and self.glFormat.compressed
noDSA = False
if noDSA:
texture.bind()
faceIndex = 0
for face in ddsCubemapFaces:
if self.header.dwCaps2 & face:
for i in range(mipCount):
if self.glFormat.compressed:
if not noDSA:
texture.setCompressedData(i, 0, ddsCubemapFaces[face],
len(self.data[faceIndex * mipCount + i]),
self.data[faceIndex * mipCount + i])
else:
gl.glCompressedTexSubImage2D(ddsCubemapFaces[face], i, 0, 0,
max(self.header.dwWidth // 2 ** i, 1),
max(self.header.dwHeight // 2 ** i, 1),
self.glFormat.internalFormat,
len(self.data[faceIndex * mipCount + i]),
self.data[faceIndex * mipCount + i])
else:
texture.setData(i, 0, ddsCubemapFaces[face], QOpenGLTexture.PixelFormat(self.glFormat.format), QOpenGLTexture.PixelType(self.glFormat.type),
self.glFormat.converter(self.data[faceIndex * mipCount + i]))
faceIndex += 1
if noDSA:
texture.release()
else:
for i in range(mipCount):
if self.glFormat.compressed:
texture.setCompressedData(i, 0, len(self.data[i]), self.data[i])
else:
texture.setData(i, 0, QOpenGLTexture.PixelFormat(self.glFormat.format), QOpenGLTexture.PixelType(self.glFormat.type),
self.glFormat.converter(self.data[i]))
texture.setWrapMode(QOpenGLTexture.WrapMode.ClampToEdge)
if self.glFormat.samplerType != "F":
# integer textures can't be filtered
texture.setMinMagFilters(QOpenGLTexture.Filter.NearestMipMapNearest, QOpenGLTexture.Filter.Nearest)
return texture
def tr(self, str):
return QCoreApplication.translate("DDSFile", str)
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