Blender-TexTools/op_uv_size_get.py

import bpy
import bmesh
import operator
from mathutils import Vector
from collections import defaultdict
from math import pi

from . import utilities_texel

class op(bpy.types.Operator):
    bl_idname = "uv.textools_uv_size_get"
    bl_label = "Get Size"
    bl_description = "Get selected object's texture size"

    @classmethod
    def poll(cls, context):
        if not bpy.context.active_object:
            return False
        
        if bpy.context.active_object not in bpy.context.selected_objects:
            return False

        if bpy.context.active_object.type != 'MESH':
            return False

        return True
    
    def execute(self, context):
        get_size(self, context)
        return {'FINISHED'}



def get_size(self, context):
    image = utilities_texel.get_object_texture_image (bpy.context.active_object)

    if not image:
        self.report({'ERROR_INVALID_INPUT'}, "No Texture found on selected object" )
        return

    bpy.context.scene.texToolsSettings.size[0] = image.size[0]
    bpy.context.scene.texToolsSettings.size[1] = image.size[1]

bpy.utils.register_class(op)