409 lines
15 KiB
Python
409 lines
15 KiB
Python
# Copyright 2021 Nick Brassel (@tzarc)
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# SPDX-License-Identifier: GPL-2.0-or-later
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# Quantum Graphics File "QGF" Image File Format.
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# See https://docs.qmk.fm/#/quantum_painter_qgf for more information.
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from colorsys import rgb_to_hsv
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from types import FunctionType
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from PIL import Image, ImageFile, ImageChops
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from PIL._binary import o8, o16le as o16, o32le as o32
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import qmk.painter
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def o24(i):
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return o16(i & 0xFFFF) + o8((i & 0xFF0000) >> 16)
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########################################################################################################################
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class QGFBlockHeader:
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block_size = 5
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def write(self, fp):
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fp.write(b'' # start off with empty bytes...
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+ o8(self.type_id) # block type id
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+ o8((~self.type_id) & 0xFF) # negated block type id
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+ o24(self.length) # blob length
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)
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########################################################################################################################
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class QGFGraphicsDescriptor:
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type_id = 0x00
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length = 18
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magic = 0x464751
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def __init__(self):
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self.header = QGFBlockHeader()
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self.header.type_id = QGFGraphicsDescriptor.type_id
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self.header.length = QGFGraphicsDescriptor.length
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self.version = 1
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self.total_file_size = 0
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self.image_width = 0
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self.image_height = 0
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self.frame_count = 0
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def write(self, fp):
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self.header.write(fp)
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fp.write(
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b'' # start off with empty bytes...
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+ o24(QGFGraphicsDescriptor.magic) # magic
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+ o8(self.version) # version
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+ o32(self.total_file_size) # file size
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+ o32((~self.total_file_size) & 0xFFFFFFFF) # negated file size
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+ o16(self.image_width) # width
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+ o16(self.image_height) # height
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+ o16(self.frame_count) # frame count
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)
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########################################################################################################################
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class QGFFrameOffsetDescriptorV1:
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type_id = 0x01
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def __init__(self, frame_count):
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self.header = QGFBlockHeader()
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self.header.type_id = QGFFrameOffsetDescriptorV1.type_id
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self.frame_offsets = [0xFFFFFFFF] * frame_count
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self.frame_count = frame_count
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def write(self, fp):
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self.header.length = len(self.frame_offsets) * 4
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self.header.write(fp)
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for offset in self.frame_offsets:
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fp.write(b'' # start off with empty bytes...
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+ o32(offset) # offset
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)
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########################################################################################################################
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class QGFFrameDescriptorV1:
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type_id = 0x02
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length = 6
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def __init__(self):
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self.header = QGFBlockHeader()
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self.header.type_id = QGFFrameDescriptorV1.type_id
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self.header.length = QGFFrameDescriptorV1.length
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self.format = 0xFF
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self.flags = 0
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self.compression = 0xFF
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self.transparency_index = 0xFF # TODO: Work out how to retrieve the transparent palette entry from the PIL gif loader
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self.delay = 1000 # Placeholder until it gets read from the animation
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def write(self, fp):
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self.header.write(fp)
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fp.write(b'' # start off with empty bytes...
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+ o8(self.format) # format
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+ o8(self.flags) # flags
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+ o8(self.compression) # compression
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+ o8(self.transparency_index) # transparency index
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+ o16(self.delay) # delay
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)
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@property
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def is_transparent(self):
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return (self.flags & 0x01) == 0x01
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@is_transparent.setter
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def is_transparent(self, val):
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if val:
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self.flags |= 0x01
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else:
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self.flags &= ~0x01
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@property
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def is_delta(self):
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return (self.flags & 0x02) == 0x02
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@is_delta.setter
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def is_delta(self, val):
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if val:
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self.flags |= 0x02
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else:
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self.flags &= ~0x02
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########################################################################################################################
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class QGFFramePaletteDescriptorV1:
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type_id = 0x03
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def __init__(self):
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self.header = QGFBlockHeader()
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self.header.type_id = QGFFramePaletteDescriptorV1.type_id
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self.header.length = 0
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self.palette_entries = [(0xFF, 0xFF, 0xFF)] * 4
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def write(self, fp):
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self.header.length = len(self.palette_entries) * 3
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self.header.write(fp)
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for entry in self.palette_entries:
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fp.write(b'' # start off with empty bytes...
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+ o8(entry[0]) # h
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+ o8(entry[1]) # s
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+ o8(entry[2]) # v
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)
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########################################################################################################################
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class QGFFrameDeltaDescriptorV1:
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type_id = 0x04
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length = 8
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def __init__(self):
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self.header = QGFBlockHeader()
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self.header.type_id = QGFFrameDeltaDescriptorV1.type_id
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self.header.length = QGFFrameDeltaDescriptorV1.length
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self.left = 0
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self.top = 0
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self.right = 0
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self.bottom = 0
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def write(self, fp):
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self.header.write(fp)
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fp.write(b'' # start off with empty bytes...
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+ o16(self.left) # left
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+ o16(self.top) # top
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+ o16(self.right) # right
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+ o16(self.bottom) # bottom
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)
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########################################################################################################################
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class QGFFrameDataDescriptorV1:
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type_id = 0x05
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def __init__(self):
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self.header = QGFBlockHeader()
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self.header.type_id = QGFFrameDataDescriptorV1.type_id
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self.data = []
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def write(self, fp):
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self.header.length = len(self.data)
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self.header.write(fp)
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fp.write(bytes(self.data))
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########################################################################################################################
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class QGFImageFile(ImageFile.ImageFile):
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format = "QGF"
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format_description = "Quantum Graphics File Format"
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def _open(self):
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raise NotImplementedError("Reading QGF files is not supported")
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########################################################################################################################
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def _accept(prefix):
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"""Helper method used by PIL to work out if it can parse an input file.
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Currently unimplemented.
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"""
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return False
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def _save(im, fp, filename):
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"""Helper method used by PIL to write to an output file.
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"""
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# Work out from the parameters if we need to do anything special
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encoderinfo = im.encoderinfo.copy()
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append_images = list(encoderinfo.get("append_images", []))
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verbose = encoderinfo.get("verbose", False)
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use_deltas = encoderinfo.get("use_deltas", True)
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use_rle = encoderinfo.get("use_rle", True)
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# Helper for inline verbose prints
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def vprint(s):
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if verbose:
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print(s)
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# Helper to iterate through all frames in the input image
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def _for_all_frames(x: FunctionType):
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frame_num = 0
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last_frame = None
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for frame in [im] + append_images:
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# Get number of of frames in this image
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nfr = getattr(frame, "n_frames", 1)
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for idx in range(nfr):
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frame.seek(idx)
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frame.load()
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copy = frame.copy().convert("RGB")
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x(frame_num, copy, last_frame)
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last_frame = copy
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frame_num += 1
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# Collect all the frame sizes
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frame_sizes = []
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_for_all_frames(lambda idx, frame, last_frame: frame_sizes.append(frame.size))
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# Make sure all frames are the same size
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if len(list(set(frame_sizes))) != 1:
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raise ValueError("Mismatching sizes on frames")
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# Write out the initial graphics descriptor (and write a dummy value), so that we can come back and fill in the
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# correct values once we've written all the frames to the output
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graphics_descriptor_location = fp.tell()
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graphics_descriptor = QGFGraphicsDescriptor()
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graphics_descriptor.frame_count = len(frame_sizes)
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graphics_descriptor.image_width = frame_sizes[0][0]
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graphics_descriptor.image_height = frame_sizes[0][1]
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vprint(f'{"Graphics descriptor block":26s} {fp.tell():5d}d / {fp.tell():04X}h')
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graphics_descriptor.write(fp)
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# Work out the frame offset descriptor location (and write a dummy value), so that we can come back and fill in the
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# correct offsets once we've written all the frames to the output
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frame_offset_location = fp.tell()
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frame_offsets = QGFFrameOffsetDescriptorV1(graphics_descriptor.frame_count)
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vprint(f'{"Frame offsets block":26s} {fp.tell():5d}d / {fp.tell():04X}h')
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frame_offsets.write(fp)
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# Helper function to save each frame to the output file
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def _write_frame(idx, frame, last_frame):
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# If we replace the frame we're going to output with a delta, we can override it here
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this_frame = frame
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location = (0, 0)
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size = frame.size
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# Work out the format we're going to use
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format = encoderinfo["qmk_format"]
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# Convert the original frame so we can do comparisons
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converted = qmk.painter.convert_requested_format(this_frame, format)
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graphic_data = qmk.painter.convert_image_bytes(converted, format)
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# Convert the raw data to RLE-encoded if requested
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raw_data = graphic_data[1]
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if use_rle:
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rle_data = qmk.painter.compress_bytes_qmk_rle(graphic_data[1])
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use_raw_this_frame = not use_rle or len(raw_data) <= len(rle_data)
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image_data = raw_data if use_raw_this_frame else rle_data
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# Work out if a delta frame is smaller than injecting it directly
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use_delta_this_frame = False
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if use_deltas and last_frame is not None:
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# If we want to use deltas, then find the difference
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diff = ImageChops.difference(frame, last_frame)
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# Get the bounding box of those differences
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bbox = diff.getbbox()
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# If we have a valid bounding box...
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if bbox:
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# ...create the delta frame by cropping the original.
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delta_frame = frame.crop(bbox)
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delta_location = (bbox[0], bbox[1])
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delta_size = (bbox[2] - bbox[0], bbox[3] - bbox[1])
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# Convert the delta frame to the requested format
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delta_converted = qmk.painter.convert_requested_format(delta_frame, format)
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delta_graphic_data = qmk.painter.convert_image_bytes(delta_converted, format)
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# Work out how large the delta frame is going to be with compression etc.
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delta_raw_data = delta_graphic_data[1]
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if use_rle:
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delta_rle_data = qmk.painter.compress_bytes_qmk_rle(delta_graphic_data[1])
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delta_use_raw_this_frame = not use_rle or len(delta_raw_data) <= len(delta_rle_data)
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delta_image_data = delta_raw_data if delta_use_raw_this_frame else delta_rle_data
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# If the size of the delta frame (plus delta descriptor) is smaller than the original, use that instead
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# This ensures that if a non-delta is overall smaller in size, we use that in preference due to flash
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# sizing constraints.
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if (len(delta_image_data) + QGFFrameDeltaDescriptorV1.length) < len(image_data):
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# Copy across all the delta equivalents so that the rest of the processing acts on those
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this_frame = delta_frame
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location = delta_location
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size = delta_size
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converted = delta_converted
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graphic_data = delta_graphic_data
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raw_data = delta_raw_data
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rle_data = delta_rle_data
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use_raw_this_frame = delta_use_raw_this_frame
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image_data = delta_image_data
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use_delta_this_frame = True
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# Write out the frame descriptor
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frame_offsets.frame_offsets[idx] = fp.tell()
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vprint(f'{f"Frame {idx:3d} base":26s} {fp.tell():5d}d / {fp.tell():04X}h')
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frame_descriptor = QGFFrameDescriptorV1()
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frame_descriptor.is_delta = use_delta_this_frame
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frame_descriptor.is_transparent = False
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frame_descriptor.format = format['image_format_byte']
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frame_descriptor.compression = 0x00 if use_raw_this_frame else 0x01 # See qp.h, painter_compression_t
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frame_descriptor.delay = frame.info['duration'] if 'duration' in frame.info else 1000 # If we're not an animation, just pretend we're delaying for 1000ms
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frame_descriptor.write(fp)
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# Write out the palette if required
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if format['has_palette']:
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palette = graphic_data[0]
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palette_descriptor = QGFFramePaletteDescriptorV1()
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# Helper to convert from RGB888 to the QMK "dialect" of HSV888
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def rgb888_to_qmk_hsv888(e):
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hsv = rgb_to_hsv(e[0] / 255.0, e[1] / 255.0, e[2] / 255.0)
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return (int(hsv[0] * 255.0), int(hsv[1] * 255.0), int(hsv[2] * 255.0))
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# Convert all palette entries to HSV888 and write to the output
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palette_descriptor.palette_entries = list(map(rgb888_to_qmk_hsv888, palette))
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vprint(f'{f"Frame {idx:3d} palette":26s} {fp.tell():5d}d / {fp.tell():04X}h')
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palette_descriptor.write(fp)
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# Write out the delta info if required
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if use_delta_this_frame:
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# Set up the rendering location of where the delta frame should be situated
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delta_descriptor = QGFFrameDeltaDescriptorV1()
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delta_descriptor.left = location[0]
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delta_descriptor.top = location[1]
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delta_descriptor.right = location[0] + size[0] - 1
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delta_descriptor.bottom = location[1] + size[1] - 1
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# Write the delta frame to the output
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vprint(f'{f"Frame {idx:3d} delta":26s} {fp.tell():5d}d / {fp.tell():04X}h')
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delta_descriptor.write(fp)
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# Write out the data for this frame to the output
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data_descriptor = QGFFrameDataDescriptorV1()
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data_descriptor.data = image_data
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vprint(f'{f"Frame {idx:3d} data":26s} {fp.tell():5d}d / {fp.tell():04X}h')
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data_descriptor.write(fp)
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# Iterate over each if the input frames, writing it to the output in the process
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_for_all_frames(_write_frame)
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# Go back and update the graphics descriptor now that we can determine the final file size
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graphics_descriptor.total_file_size = fp.tell()
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fp.seek(graphics_descriptor_location, 0)
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graphics_descriptor.write(fp)
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# Go back and update the frame offsets now that they're written to the file
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fp.seek(frame_offset_location, 0)
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frame_offsets.write(fp)
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########################################################################################################################
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# Register with PIL so that it knows about the QGF format
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Image.register_open(QGFImageFile.format, QGFImageFile, _accept)
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Image.register_save(QGFImageFile.format, _save)
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Image.register_save_all(QGFImageFile.format, _save)
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Image.register_extension(QGFImageFile.format, f".{QGFImageFile.format.lower()}")
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Image.register_mime(QGFImageFile.format, f"image/{QGFImageFile.format.lower()}")
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