81 lines
2.9 KiB
Python
81 lines
2.9 KiB
Python
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from art_export import ArtExporter
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from image_export import export_still_image
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from ui_dialog import UIDialog, Field
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from ui_art_dialog import ExportOptionsDialog
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DEFAULT_SCALE = 4
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DEFAULT_CRT = True
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class PNGExportOptionsDialog(ExportOptionsDialog):
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title = 'PNG image export options'
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field0_label = 'Scale factor (%s pixels)'
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field1_label = 'CRT filter'
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fields = [
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Field(label=field0_label, type=int, width=6, oneline=False),
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Field(label=field1_label, type=bool, width=0, oneline=True)
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]
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# redraw dynamic labels
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always_redraw_labels = True
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invalid_scale_error = 'Scale must be greater than 0'
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def get_initial_field_text(self, field_number):
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if field_number == 0:
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return str(DEFAULT_SCALE)
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elif field_number == 1:
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return [' ', UIDialog.true_field_text][DEFAULT_CRT]
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def get_field_label(self, field_index):
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label = self.fields[field_index].label
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if field_index == 0:
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valid,_ = self.is_input_valid()
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if not valid:
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label %= '???'
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else:
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# calculate exported image size
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art = self.ui.active_art
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scale = int(self.field_texts[0])
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width = art.charset.char_width * art.width * scale
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height = art.charset.char_height * art.height * scale
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label %= '%s x %s' % (width, height)
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return label
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def is_input_valid(self):
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# scale factor: >0 int
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try: int(self.field_texts[0])
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except: return False, self.invalid_scale_error
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if int(self.field_texts[0]) <= 0:
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return False, self.invalid_scale_error
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return True, None
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def confirm_pressed(self):
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valid, reason = self.is_input_valid()
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if not valid: return
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self.dismiss()
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# compile options for exporter
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options = {
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'scale': int(self.field_texts[0]),
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'crt': bool(self.field_texts[1].strip())
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}
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ExportOptionsDialog.do_export(self.ui.app, self.filename, options)
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class PNGExporter(ArtExporter):
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format_name = 'PNG image'
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format_description = """
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PNG format (lossless compression) still image of current frame.
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Can be exported with or without CRT filter effect.
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If palette has only one transparent (alpha <1.0) color,
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exported image will be 8-bit with same palette as this Art.
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Otherwise it will be 32-bit with alpha transparency.
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If CRT filter is enabled, image will always be 32-bit.
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"""
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file_extension = 'png'
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options_dialog_class = PNGExportOptionsDialog
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def run_export(self, out_filename, options):
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# heavy lifting done by image_export module
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return export_still_image(self.app, self.app.ui.active_art,
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out_filename,
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crt=options.get('crt', DEFAULT_CRT),
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scale=options.get('scale', DEFAULT_SCALE))
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