5 def encode_pixels(pixels):
6 from .datafile import Token
7 return Token(codecs.decode(b"="+base64.b64encode(bytes(pixels))+b"=", "ascii"))
9 def pixels_to_rgba(pixels):
10 return (int(p*255) for p in pixels)
12 def pixels_to_rgb(pixels):
13 for i in range(0, len(pixels), 4):
14 yield int(pixels[i]*255)
15 yield int(pixels[i+1]*255)
16 yield int(pixels[i+2]*255)
18 def pixels_to_gray(pixels):
19 for i in range(0, len(pixels), 4):
20 yield int((pixels[i]+pixels[i+1]+pixels[i+2])*255/3)
22 class TextureExporter:
24 self.inline_data = True
26 def export_texture(self, tex_node, usage='RGB'):
27 image = tex_node.image
28 from .datafile import Resource, Statement, Token
29 tex_res = Resource(image.name+".tex2d", "texture2d")
31 if tex_node.use_mipmap:
32 tex_res.statements.append(Statement("generate_mipmap", True))
34 colorspace = image.colorspace_settings.name
35 if usage=='GRAY' and colorspace=='sRGB':
36 raise Exception("Grayscale textures with sRGB colorspace are not supported")
38 from .util import basename
39 fn = basename(image.filepath)
40 if not self.inline_data and fn:
41 srgb = "_srgb" if colorspace=='sRGB' else ""
42 tex_res.statements.append(Statement("external_image"+srgb, fn))
45 fmt = 'SRGB8_ALPHA8' if colorspace=='sRGB' else 'RGBA8'
49 fmt = 'SRGB8' if colorspace=='sRGB' else 'RGB8'
51 tex_res.statements.append(Statement("storage", Token(fmt), image.size[0], image.size[1]))
53 pixels = tuple(image.pixels)
56 texdata = encode_pixels(pixels_to_rgba(pixels))
58 texdata = encode_pixels(pixels_to_gray(pixels))
60 texdata = encode_pixels(pixels_to_rgb(pixels))
61 tex_res.statements.append(Statement("raw_data", texdata))
65 class SamplerExporter:
66 def export_sampler(self, tex_node):
67 from .datafile import Resource, Statement, Token
68 samp_res = Resource(self.get_sampler_name(tex_node), "sampler")
70 use_interpolation = tex_node.interpolation!='Closest'
72 if tex_node.use_mipmap:
73 samp_res.statements.append(Statement("filter", Token('LINEAR_MIPMAP_LINEAR')))
75 samp_res.statements.append(Statement("filter", Token('LINEAR')))
76 samp_res.statements.append(Statement("max_anisotropy", tex_node.max_anisotropy))
78 if tex_node.use_mipmap:
79 samp_res.statements.append(Statement("filter", Token('NEAREST_MIPMAP_NEAREST')))
81 samp_res.statements.append(Statement("filter", Token('NEAREST')))
83 if tex_node.extension=="REPEAT":
84 samp_res.statements.append(Statement("wrap", Token('REPEAT')))
85 elif tex_node.extension=="EXTEND":
86 samp_res.statements.append(Statement("wrap", Token('CLAMP_TO_EDGE')))
87 elif tex_node.extension=="CLIP":
88 samp_res.statements.append(Statement("wrap", Token('CLAMP_TO_BORDER')))
89 samp_res.statements.append(Statement("border_color", 0.0, 0.0, 0.0, 0.0))
93 def get_sampler_name(self, tex_node):
96 use_interpolation = tex_node.interpolation!='Closest'
97 name_parts.append("linear" if use_interpolation else "nearest")
98 if tex_node.use_mipmap:
99 name_parts.append("mip")
100 if use_interpolation and tex_node.max_anisotropy>1:
101 name_parts.append("aniso{:g}x".format(tex_node.max_anisotropy))
102 if tex_node.extension!="REPEAT":
103 name_parts.append("clip" if tex_node.extension=="CLIP" else "clamp")
105 return "_".join(name_parts)+".samp"