import os
-import base64
-import codecs
+import bpy
def pixels_to_rgba(pixels):
return (int(p*255) for p in pixels)
yield int(pixels[i+1]*255)
yield int(pixels[i+2]*255)
-def pixels_to_rgb_invert_green(pixels):
+def pixels_to_rgb_invert(pixels, mask):
for i in range(0, len(pixels), 4):
- yield int(pixels[i]*255)
- yield 255-int(pixels[i+1]*255)
- yield int(pixels[i+2]*255)
+ r = int(pixels[i]*255)
+ yield 255-r if mask&1 else r
+ g = int(pixels[i+1]*255)
+ yield 255-g if mask&2 else g
+ b = int(pixels[i+2]*255)
+ yield 255-b if mask&4 else b
def pixels_to_gray(pixels):
for i in range(0, len(pixels), 4):
yield int((pixels[i]+pixels[i+1]+pixels[i+2])*255/3)
+def pixels_to_single_channel(pixels, channel):
+ for i in range(0, len(pixels), 4):
+ yield int(pixels[i+channel]*255)
+
class TextureExporter:
- def export_texture(self, tex_node, usage='RGB', *, invert_green=False):
+ def export_texture(self, tex_node, channels=['R', 'G', 'B']):
image = tex_node.image
from .datafile import RawData, Resource, Statement, Token
- tex_res = Resource(image.name+".tex", "texture")
+ tex_res = Resource(self.get_texture_name(tex_node, channels), "texture")
tex_res.statements.append(Statement("type", Token("\\2d")))
tex_res.statements.append(Statement("generate_mipmap", True))
colorspace = image.colorspace_settings.name
- if usage=='GRAY' and colorspace=='sRGB':
+ if len(channels)==1 and colorspace=='sRGB':
raise Exception("Unsupported configuration on texture {}: Grayscale with sRGB".format(image.name))
- from .util import basename
- fn = basename(image.filepath)
- if not invert_green and fn:
+ invert_mask = sum(1<<i for i, c in enumerate(channels) if c[0]=='~')
+
+ fn = bpy.path.basename(image.filepath)
+ native_channels = None
+ if fn:
+ abs_path = bpy.path.abspath(image.filepath)
+ if os.path.exists(abs_path):
+ import imbuf
+ native_bpp = imbuf.load(bpy.path.abspath(image.filepath)).planes
+ if native_bpp==32:
+ native_channels = ['R', 'G', 'B', 'A']
+ elif native_bpp==24:
+ native_channels = ['R', 'G', 'B']
+ elif native_bpp==8:
+ native_channels = ['Y']
+
+ if not invert_mask and channels==native_channels:
if not tex_node.use_mipmap:
tex_res.statements.append(Statement("mipmap_levels", 1))
srgb = "_srgb" if colorspace=='sRGB' else ""
tex_res.statements.append(Statement("external_image"+srgb, fn))
else:
- if usage=='RGBA':
+ if len(channels)==4:
fmt = 'SRGB8_ALPHA8' if colorspace=='sRGB' else 'RGBA8'
- elif usage=='GRAY':
- fmt = 'LUMINANCE8'
+ elif len(channels)==1:
+ fmt = 'LUMINANCE8' if channels[0]=='Y' else 'R8'
else:
fmt = 'SRGB8' if colorspace=='sRGB' else 'RGB8'
pixels = tuple(image.pixels)
texdata = ""
- if usage=='RGBA':
+ if len(channels)==4:
texdata = pixels_to_rgba(pixels)
- elif usage=='GRAY':
- texdata = pixels_to_gray(pixels)
- elif invert_green:
- texdata = pixels_to_rgb_invert_green(pixels)
+ elif len(channels)==1:
+ if channels[0]=='Y':
+ texdata = pixels_to_gray(pixels)
+ else:
+ texdata = pixels_to_single_channel(pixels, "RGBA".index(channels[0]))
+ elif invert_mask:
+ texdata = pixels_to_rgb_invert(pixels, invert_mask)
else:
texdata = pixels_to_rgb(pixels)
- data = RawData(image.name+".mdr", bytes(texdata))
+ data = RawData(os.path.splitext(tex_res.name)[0]+".mdr", bytes(texdata))
tex_res.statements.append(tex_res.create_reference_statement("external_data", data))
return tex_res
+ def get_texture_name(self, tex_node, channels):
+ image_name = tex_node.image.name
+ if len(channels)==1 and channels[0]!='Y':
+ image_name += "_"+channels[0]
+ return image_name+".tex"
+
class SamplerExporter:
def export_sampler(self, tex_node):
from .datafile import Resource, Statement, Token