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https://github.com/python-pillow/Pillow.git
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Some Flake 8 fixes
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Alex Clark
parent
ea65087a20
commit
071df8d33d
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@ -57,16 +57,16 @@ def _accept(prefix):
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return prefix[:2] == b"BM"
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#===============================================================================
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# ==============================================================================
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# Image plugin for the Windows BMP format.
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#===============================================================================
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# ==============================================================================
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class BmpImageFile(ImageFile.ImageFile):
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""" Image plugin for the Windows Bitmap format (BMP) """
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#--------------------------------------------------------------- Description
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# -------------------------------------------------------------- Description
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format_description = "Windows Bitmap"
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format = "BMP"
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#---------------------------------------------------- BMP Compression values
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# --------------------------------------------------- BMP Compression values
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COMPRESSIONS = {'RAW': 0, 'RLE8': 1, 'RLE4': 2, 'BITFIELDS': 3, 'JPEG': 4, 'PNG': 5}
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RAW, RLE8, RLE4, BITFIELDS, JPEG, PNG = 0, 1, 2, 3, 4, 5
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@ -78,10 +78,10 @@ class BmpImageFile(ImageFile.ImageFile):
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file_info = dict()
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file_info['header_size'] = i32(read(4)) # read bmp header size @offset 14 (this is part of the header size)
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file_info['direction'] = -1
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#---------------------- If requested, read header at a specific position
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# --------------------- If requested, read header at a specific position
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header_data = ImageFile._safe_read(self.fp, file_info['header_size'] - 4) # read the rest of the bmp header, without its size
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#---------------------------------------------------- IBM OS/2 Bitmap v1
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#------- This format has different offsets because of width/height types
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# --------------------------------------------------- IBM OS/2 Bitmap v1
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# ------ This format has different offsets because of width/height types
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if file_info['header_size'] == 12:
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file_info['width'] = i16(header_data[0:2])
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file_info['height'] = i16(header_data[2:4])
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@ -89,8 +89,8 @@ class BmpImageFile(ImageFile.ImageFile):
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file_info['bits'] = i16(header_data[6:8])
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file_info['compression'] = self.RAW
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file_info['palette_padding'] = 3
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#----------------------------------------------- Windows Bitmap v2 to v5
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elif file_info['header_size'] in (40, 64, 108, 124): # v3, OS/2 v2, v4, v5
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# ---------------------------------------------- Windows Bitmap v2 to v5
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elif file_info['header_size'] in (40, 64, 108, 124): # v3, OS/2 v2, v4, v5
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if file_info['header_size'] >= 40: # v3 and OS/2
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file_info['y_flip'] = i8(header_data[7]) == 0xff
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file_info['direction'] = 1 if file_info['y_flip'] else -1
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@ -100,7 +100,7 @@ class BmpImageFile(ImageFile.ImageFile):
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file_info['bits'] = i16(header_data[10:12])
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file_info['compression'] = i32(header_data[12:16])
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file_info['data_size'] = i32(header_data[16:20]) # byte size of pixel data
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file_info['pixels_per_meter'] = (i32(header_data[20:24]), i32(header_data[24:28]))
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file_info['pixels_per_meter'] = (i32(header_data[20:24]), i32(header_data[24:28]))
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file_info['colors'] = i32(header_data[28:32])
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file_info['palette_padding'] = 4
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self.info["dpi"] = tuple(map(lambda x: math.ceil(x / 39.3701), file_info['pixels_per_meter']))
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@ -115,27 +115,27 @@ class BmpImageFile(ImageFile.ImageFile):
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file_info['rgba_mask'] = (file_info['r_mask'], file_info['g_mask'], file_info['b_mask'], file_info['a_mask'])
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else:
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raise IOError("Unsupported BMP header type (%d)" % file_info['header_size'])
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#------------------- Special case : header is reported 40, which
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#----------------------- is shorter than real size for bpp >= 16
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# ------------------ Special case : header is reported 40, which
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# ---------------------- is shorter than real size for bpp >= 16
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self.size = file_info['width'], file_info['height']
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#--------- If color count was not found in the header, compute from bits
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# -------- If color count was not found in the header, compute from bits
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file_info['colors'] = file_info['colors'] if file_info.get('colors', 0) else (1 << file_info['bits'])
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#--------------------------------- Check abnormal values for DOS attacks
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# -------------------------------- Check abnormal values for DOS attacks
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if file_info['width'] * file_info['height'] > 2**31:
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raise IOError("Unsupported BMP Size: (%dx%d)" % self.size)
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#------------------------ Check bit depth for unusual unsupported values
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# ----------------------- Check bit depth for unusual unsupported values
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self.mode, raw_mode = BIT2MODE.get(file_info['bits'], (None, None))
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if self.mode is None:
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raise IOError("Unsupported BMP pixel depth (%d)" % file_info['bits'])
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#------------------ Process BMP with Bitfields compression (not palette)
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# ----------------- Process BMP with Bitfields compression (not palette)
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if file_info['compression'] == self.BITFIELDS:
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SUPPORTED = {
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32: [(0xff0000, 0xff00, 0xff, 0x0), (0xff0000, 0xff00, 0xff, 0xff000000), (0x0, 0x0, 0x0, 0x0)],
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24: [(0xff0000, 0xff00, 0xff)],
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32: [(0xff0000, 0xff00, 0xff, 0x0), (0xff0000, 0xff00, 0xff, 0xff000000), (0x0, 0x0, 0x0, 0x0)],
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24: [(0xff0000, 0xff00, 0xff)],
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16: [(0xf800, 0x7e0, 0x1f), (0x7c00, 0x3e0, 0x1f)]}
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MASK_MODES = {
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(32, (0xff0000, 0xff00, 0xff, 0x0)): "BGRX", (32, (0xff0000, 0xff00, 0xff, 0xff000000)): "BGRA", (32, (0x0, 0x0, 0x0, 0x0)): "BGRA",
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(24, (0xff0000, 0xff00, 0xff)): "BGR",
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(32, (0xff0000, 0xff00, 0xff, 0x0)): "BGRX", (32, (0xff0000, 0xff00, 0xff, 0xff000000)): "BGRA", (32, (0x0, 0x0, 0x0, 0x0)): "BGRA",
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(24, (0xff0000, 0xff00, 0xff)): "BGR",
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(16, (0xf800, 0x7e0, 0x1f)): "BGR;16", (16, (0x7c00, 0x3e0, 0x1f)): "BGR;15"}
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if file_info['bits'] in SUPPORTED:
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if file_info['bits'] == 32 and file_info['rgba_mask'] in SUPPORTED[file_info['bits']]:
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@ -152,9 +152,9 @@ class BmpImageFile(ImageFile.ImageFile):
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raw_mode, self.mode = "BGRA", "RGBA"
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else:
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raise IOError("Unsupported BMP compression (%d)" % file_info['compression'])
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#----------------- Once the header is processed, process the palette/LUT
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# ---------------- Once the header is processed, process the palette/LUT
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if self.mode == "P": # Paletted for 1, 4 and 8 bit images
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#------------------------------------------------------ 1-bit images
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# ----------------------------------------------------- 1-bit images
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if not (0 < file_info['colors'] <= 65536):
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raise IOError("Unsupported BMP Palette size (%d)" % file_info['colors'])
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else:
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@ -162,23 +162,23 @@ class BmpImageFile(ImageFile.ImageFile):
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palette = read(padding * file_info['colors'])
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greyscale = True
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indices = (0, 255) if file_info['colors'] == 2 else list(range(file_info['colors']))
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#------------------- Check if greyscale and ignore palette if so
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# ------------------ Check if greyscale and ignore palette if so
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for ind, val in enumerate(indices):
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rgb = palette[ind*padding:ind*padding + 3]
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if rgb != o8(val) * 3:
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greyscale = False
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#--------- If all colors are grey, white or black, ditch palette
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# -------- If all colors are grey, white or black, ditch palette
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if greyscale:
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self.mode = "1" if file_info['colors'] == 2 else "L"
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raw_mode = self.mode
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else:
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self.mode = "P"
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self.palette = ImagePalette.raw("BGRX" if padding == 4 else "BGR", palette)
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#------------------------------ Finally set the tile data for the plugin
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# ----------------------------- Finally set the tile data for the plugin
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self.info['compression'] = file_info['compression']
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self.tile = [('raw', (0, 0, file_info['width'], file_info['height']), offset or self.fp.tell(),
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(raw_mode, ((file_info['width'] * file_info['bits'] + 31) >> 3) & (~3), file_info['direction'])
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(raw_mode, ((file_info['width'] * file_info['bits'] + 31) >> 3) & (~3), file_info['direction'])
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)]
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def _open(self):
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@ -188,16 +188,15 @@ class BmpImageFile(ImageFile.ImageFile):
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# choke if the file does not have the required magic bytes
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if head_data[0:2] != b"BM":
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raise SyntaxError("Not a BMP file")
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# read the start position of the BMP image data (u32)
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# read the start position of the BMP image data (u32)
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offset = i32(head_data[10:14])
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# load bitmap information (offset=raster info)
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self._bitmap(offset=offset)
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#===============================================================================
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# ==============================================================================
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# Image plugin for the DIB format (BMP alias)
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#===============================================================================
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# ==============================================================================
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class DibImageFile(BmpImageFile):
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format = "DIB"
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@ -206,8 +205,6 @@ class DibImageFile(BmpImageFile):
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def _open(self):
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self._bitmap()
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#
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# --------------------------------------------------------------------
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# Write BMP file
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