Allow customize scale filter

src/sticker_convert/cli.py

@@ -67,7 +67,7 @@ def cli(self):
                     'color_min', 'color_max',
                     'duration_min', 'duration_max',
                     'vid_size_max', 'img_size_max')
-        flags_str = ('vid_format', 'img_format', 'cache_dir')
+        flags_str = ('vid_format', 'img_format', 'cache_dir', 'scale_filter')
         flags_bool = ('fake_vid')
         for k, v in self.help['comp'].items():
             if k in flags_int:
@@ -229,6 +229,7 @@ def get_opt_comp(self, args) -> dict:
             'steps': self.compression_presets[preset]['steps'] if args.steps == None else args.steps,
             'fake_vid': self.compression_presets[preset]['fake_vid'] if args.fake_vid == None else args.fake_vid,
             'cache_dir': args.cache_dir,
+            'scale_filter': args.scale_filter,
             'default_emoji': args.default_emoji,
             'no_compress': args.no_compress,
             'processes': args.processes if args.processes else math.ceil(cpu_count() / 2)

src/sticker_convert/converter.py

@@ -283,7 +283,19 @@ def frames_resize(self, frames_in: list[np.ndarray]) -> list[np.ndarray]:
             else:
                 height_new = self.res_h
                 width_new = width * self.res_h // height
-            im = im.resize((width_new, height_new), resample=Image.LANCZOS)
+
+            if self.opt_comp.scale_filter == 'nearest':
+                resample = Image.NEAREST
+            elif self.opt_comp.scale_filter == 'bilnear':
+                resample = Image.BILINEAR
+            elif self.opt_comp.scale_filter == 'bicubic':
+                resample = Image.BICUBIC
+            elif self.opt_comp.scale_filter == 'lanczos':
+                resample = Image.LANCZOS
+            else:
+                resample = Image.LANCZOS
+
+            im = im.resize((width_new, height_new), resample=resample)
             im_new = Image.new('RGBA', (self.res_w, self.res_h), (0, 0, 0, 0))
             im_new.paste(
                 im, ((self.res_w - width_new) // 2, (self.res_h - height_new) // 2)

src/sticker_convert/gui.py

@@ -125,6 +125,7 @@ def declare_variables(self):
         self.img_format_var = StringVar(self)
         self.vid_format_var = StringVar(self)
         self.fake_vid_var = BooleanVar()
+        self.scale_filter_var = StringVar(self)
         self.cache_dir_var = StringVar(self)
         self.default_emoji_var = StringVar(self)
         self.steps_var = IntVar(self) 
@@ -381,6 +382,7 @@ def get_opt_comp(self) -> dict:
             },
             'steps': self.steps_var.get(),
             'fake_vid': self.fake_vid_var.get(),
+            'scale_filter': self.scale_filter_var.get(),
             'cache_dir': self.cache_dir_var.get() if self.cache_dir_var.get() != '' else None,
             'default_emoji': self.default_emoji_var.get(),
             'no_compress': self.no_compress_var.get(),
@@ -545,7 +547,7 @@ def highlight_fields(self) -> bool:
         if os.path.isdir(self.input_setdir_var.get()):
             self.input_frame.input_setdir_entry.config(bootstyle='default')
         else:
-            self.input_frame.input_setdir_entry.config(bootstyle='danger')
+            self.input_frame.input_setdir_entry.config(bootstyle='warning')
 
         self.input_frame.address_lbl.config(text=self.input_presets[input_option_display]['address_lbls'])
         self.input_frame.address_entry.config(bootstyle='default')
@@ -575,7 +577,7 @@ def highlight_fields(self) -> bool:
         if os.path.isdir(self.output_setdir_var.get()):
             self.output_frame.output_setdir_entry.config(bootstyle='default')
         else:
-            self.output_frame.output_setdir_entry.config(bootstyle='danger')
+            self.output_frame.output_setdir_entry.config(bootstyle='warning')
 
         if (MetadataHandler.check_metadata_required(output_option, 'title') and
             not MetadataHandler.check_metadata_provided(self.input_setdir_var.get(), input_option, 'title') and

src/sticker_convert/gui_components/frames/comp_frame.py

@@ -81,6 +81,7 @@ def cb_comp_apply_preset(self, *args):
         self.gui.img_format_var.set(self.gui.compression_presets[selection]['format']['img'])
         self.gui.vid_format_var.set(self.gui.compression_presets[selection]['format']['vid'])
         self.gui.fake_vid_var.set(self.gui.compression_presets[selection]['fake_vid'])
+        self.gui.scale_filter_var.set(self.gui.compression_presets[selection]['scale_filter'])
         self.gui.default_emoji_var.set(self.gui.compression_presets[selection]['default_emoji'])
         self.gui.steps_var.set(self.gui.compression_presets[selection]['steps'])
 

src/sticker_convert/gui_components/windows/advanced_compression_window.py

@@ -112,6 +112,10 @@ def __init__(self, *args, **kwargs):
         self.fake_vid_lbl = Label(self.frame_advcomp, text='Convert (faking) image to video')
         self.fake_vid_cbox = Checkbutton(self.frame_advcomp, variable=self.gui.fake_vid_var, onvalue=True, offvalue=False, bootstyle='success-round-toggle')
 
+        self.scale_filter_help_btn = Button(self.frame_advcomp, text='?', width=1, command=lambda: cb_msg_block_adv_comp_win(self.gui.help['comp']['scale_filter']), bootstyle='secondary')
+        self.scale_filter_lbl = Label(self.frame_advcomp, text='Scale filter')
+        self.scale_filter_opt = OptionMenu(self.frame_advcomp, self.gui.scale_filter_var, self.gui.scale_filter_var.get(), 'nearest', 'bilnear', 'bicubic', 'lanczos', bootstyle='secondary')
+
         self.cache_dir_help_btn = Button(self.frame_advcomp, text='?', width=1, command=lambda: cb_msg_block_adv_comp_win(self.gui.help['comp']['cache_dir']), bootstyle='secondary')
         self.cache_dir_lbl = Label(self.frame_advcomp, text='Custom cache directory')
         self.cache_dir_entry = Entry(self.frame_advcomp, textvariable=self.gui.cache_dir_var, width=30)
@@ -190,13 +194,17 @@ def __init__(self, *args, **kwargs):
         self.fake_vid_lbl.grid(column=1, row=10, sticky='w', padx=3, pady=3)
         self.fake_vid_cbox.grid(column=6, row=10, sticky='nes', padx=3, pady=3)
 
-        self.cache_dir_help_btn.grid(column=0, row=11, sticky='w', padx=3, pady=3)
-        self.cache_dir_lbl.grid(column=1, row=11, sticky='w', padx=3, pady=3)
-        self.cache_dir_entry.grid(column=2, row=11, columnspan=4, sticky='nes', padx=3, pady=3)
+        self.scale_filter_help_btn.grid(column=0, row=11, sticky='w', padx=3, pady=3)
+        self.scale_filter_lbl.grid(column=1, row=11, sticky='w', padx=3, pady=3)
+        self.scale_filter_opt.grid(column=2, row=11, columnspan=4, sticky='nes', padx=3, pady=3)
+
+        self.cache_dir_help_btn.grid(column=0, row=12, sticky='w', padx=3, pady=3)
+        self.cache_dir_lbl.grid(column=1, row=12, sticky='w', padx=3, pady=3)
+        self.cache_dir_entry.grid(column=2, row=12, columnspan=4, sticky='nes', padx=3, pady=3)
 
-        self.default_emoji_help_btn.grid(column=0, row=12, sticky='w', padx=3, pady=3)
-        self.default_emoji_lbl.grid(column=1, row=12, sticky='w', padx=3, pady=3)
-        self.default_emoji_dsp.grid(column=6, row=12, sticky='nes', padx=3, pady=3)
+        self.default_emoji_help_btn.grid(column=0, row=13, sticky='w', padx=3, pady=3)
+        self.default_emoji_lbl.grid(column=1, row=13, sticky='w', padx=3, pady=3)
+        self.default_emoji_dsp.grid(column=6, row=13, sticky='nes', padx=3, pady=3)
 
         # https://stackoverflow.com/questions/43731784/tkinter-canvas-scrollbar-with-grid
         # Create a frame for the canvas with non-zero row&column weights

src/sticker_convert/job_option.py

@@ -118,6 +118,7 @@ def __init__(self, comp_config_dict: dict):
 
         self.steps = to_int(comp_config_dict.get('steps'))
         self.fake_vid = comp_config_dict.get('fake_vid')
+        self.scale_filter = comp_config_dict.get('scale_filter', 'lanczos')
         self.cache_dir = comp_config_dict.get('cache_dir')
         self.default_emoji = comp_config_dict.get('default_emoji')
         self.no_compress = comp_config_dict.get('no_compress')
@@ -166,6 +167,7 @@ def to_dict(self) -> dict:
             },
             'steps': self.steps,
             'fake_vid': self.fake_vid,
+            'scale_filter': self.scale_filter,
             'cache_dir': self.cache_dir,
             'default_emoji': self.default_emoji,
             'no_compress': self.no_compress,

src/sticker_convert/resources/compression.json

@@ -36,6 +36,7 @@
         },
         "steps": 16,
         "fake_vid": false,
+        "scale_filter": "lanczos",
         "default_emoji": "😀"
     },
     "signal": {
@@ -75,6 +76,7 @@
         },
         "steps": 16,
         "fake_vid": false,
+        "scale_filter": "lanczos",
         "default_emoji": "😀"
     },
     "telegram": {
@@ -114,6 +116,7 @@
         },
         "steps": 16,
         "fake_vid": false,
+        "scale_filter": "lanczos",
         "default_emoji": "😀"
     },
     "whatsapp": {
@@ -153,6 +156,7 @@
         },
         "steps": 16,
         "fake_vid": true,
+        "scale_filter": "lanczos",
         "default_emoji": "😀"
     },
     "line": {
@@ -192,6 +196,7 @@
         },
         "steps": 16,
         "fake_vid": false,
+        "scale_filter": "lanczos",
         "default_emoji": "😀"
     },
     "kakao": {
@@ -231,6 +236,7 @@
         },
         "steps": 16,
         "fake_vid": false,
+        "scale_filter": "lanczos",
         "default_emoji": "😀"
     },
     "imessage_small": {
@@ -270,6 +276,7 @@
         },
         "steps": 8,
         "fake_vid": false,
+        "scale_filter": "lanczos",
         "default_emoji": "😀"
     },
     "imessage_medium": {
@@ -309,6 +316,7 @@
         },
         "steps": 8,
         "fake_vid": false,
+        "scale_filter": "lanczos",
         "default_emoji": "😀"
     },
     "imessage_large": {
@@ -348,6 +356,7 @@
         },
         "steps": 8,
         "fake_vid": false,
+        "scale_filter": "lanczos",
         "default_emoji": "😀"
     },
     "custom": {
@@ -387,6 +396,7 @@
         },
         "steps": 16,
         "fake_vid": false,
+        "scale_filter": "lanczos",
         "default_emoji": "😀"
     }
 }

src/sticker_convert/resources/help.json

@@ -41,6 +41,7 @@
         "vid_format": "Set file format if input is animated.",
         "img_format": "Set file format if input is static.",
         "fake_vid": "Convert (faking) image to video.\nUseful if:\n(1) Size limit for video is larger than image;\n(2) Mix image and video into same pack.",
+        "scale_filter": "Set scale filter. Default as lanczos. Valid options are:\n- nearest = Use nearest neighbour (Suitable for pixel art)\n- bilnear = linear interpolation\n- bicubic = Cubic spline interpolation\n- lanczos = A high-quality downsampling filter",
         "cache_dir": "Set custom cache directory.\nUseful for debugging, or speed up conversion if cache_dir is on RAM disk.",
         "default_emoji": "Set the default emoji for uploading Signal and Telegram sticker packs."
     },