blender/io_mspgl/export_texture.py

   1 import os
   2
   3 class TextureExporter:
   4         def __init__(self):
   5                 self.inline_data = True
   6
   7         def export_texture(self, tex_node, usage='RGB'):
   8                 image = tex_node.image
   9                 from .datafile import Resource, Statement, Token
  10                 tex_res = Resource(image.name+".tex2d", "texture2d")
  11
  12                 if tex_node.use_mipmap:
  13                         tex_res.statements.append(Statement("generate_mipmap", True))
  14
  15                 colorspace = image.colorspace_settings.name
  16                 if usage=='GRAY' and colorspace=='sRGB':
  17                                 raise Exception("Grayscale textures with sRGB colorspace are not supported")
  18
  19                 from .util import basename
  20                 fn = basename(image.filepath)
  21                 if not self.inline_data and fn:
  22                         srgb = "_srgb" if colorspace=='sRGB' else ""
  23                         tex_res.statements.append(Statement("external_image"+srgb, fn))
  24                 else:
  25                         if usage=='RGBA':
  26                                 fmt = 'SRGB8_ALPHA8' if colorspace=='sRGB' else 'RGBA8'
  27                         elif usage=='GRAY':
  28                                 fmt = 'LUMINANCE8'
  29                         else:
  30                                 fmt = 'SRGB8' if colorspace=='sRGB' else 'RGB8'
  31
  32                         tex_res.statements.append(Statement("storage", Token(fmt), image.size[0], image.size[1]))
  33
  34                         texdata = ""
  35                         if usage=='RGBA':
  36                                 for p in image.pixels:
  37                                         texdata += "\\x{:02X}".format(int(p*255))
  38                         elif usage=='GRAY':
  39                                 for i in range(0, len(image.pixels), 4):
  40                                         texdata += "\\x{:02X}".format(image.pixels[i])
  41                         else:
  42                                 for i in range(0, len(image.pixels), 4):
  43                                         for j in range(3):
  44                                                 texdata += "\\x{:02X}".format(int(image.pixels[i+j]*255))
  45                         tex_res.statements.append(Statement("raw_data", texdata))
  46
  47                 return tex_res
  48
  49 class SamplerExporter:
  50         def export_sampler(self, tex_node):
  51                 from .datafile import Resource, Statement, Token
  52                 samp_res = Resource(self.get_sampler_name(tex_node), "sampler")
  53
  54                 use_interpolation = tex_node.interpolation!='Closest'
  55                 if use_interpolation:
  56                         if tex_node.use_mipmap:
  57                                 samp_res.statements.append(Statement("filter", Token('LINEAR_MIPMAP_LINEAR')))
  58                         else:
  59                                 samp_res.statements.append(Statement("filter", Token('LINEAR')))
  60                         samp_res.statements.append(Statement("max_anisotropy", tex_node.max_anisotropy))
  61                 else:
  62                         if tex_node.use_mipmap:
  63                                 samp_res.statements.append(Statement("filter", Token('NEAREST_MIPMAP_NEAREST')))
  64                         else:
  65                                 samp_res.statements.append(Statement("filter", Token('NEAREST')))
  66
  67                 return samp_res
  68
  69         def get_sampler_name(self, tex_node):
  70                 name_parts = []
  71
  72                 use_interpolation = tex_node.interpolation!='Closest'
  73                 name_parts.append("linear" if use_interpolation else "nearest")
  74                 if tex_node.use_mipmap:
  75                         name_parts.append("mip")
  76                 if use_interpolation and tex_node.max_anisotropy>1:
  77                         name_parts.append("aniso{:g}x".format(tex_node.max_anisotropy))
  78
  79                 return "_".join(name_parts)+".samp"