mirror of
https://github.com/python-pillow/Pillow.git
synced 2024-11-10 19:56:47 +03:00
112 lines
3.8 KiB
Python
112 lines
3.8 KiB
Python
from helper import unittest, PillowTestCase, hopper
|
|
from PIL import Image, ImageWin
|
|
|
|
import sys
|
|
import ctypes
|
|
from io import BytesIO
|
|
|
|
# see https://github.com/python-pillow/Pillow/pull/1431#issuecomment-144692652
|
|
|
|
if sys.platform.startswith('win32'):
|
|
import ctypes.wintypes
|
|
|
|
class BITMAPFILEHEADER(ctypes.Structure):
|
|
_pack_ = 2
|
|
_fields_ = [
|
|
('bfType', ctypes.wintypes.WORD),
|
|
('bfSize', ctypes.wintypes.DWORD),
|
|
('bfReserved1', ctypes.wintypes.WORD),
|
|
('bfReserved2', ctypes.wintypes.WORD),
|
|
('bfOffBits', ctypes.wintypes.DWORD),
|
|
]
|
|
|
|
class BITMAPINFOHEADER(ctypes.Structure):
|
|
_pack_ = 2
|
|
_fields_ = [
|
|
('biSize', ctypes.wintypes.DWORD),
|
|
('biWidth', ctypes.wintypes.LONG),
|
|
('biHeight', ctypes.wintypes.LONG),
|
|
('biPlanes', ctypes.wintypes.WORD),
|
|
('biBitCount', ctypes.wintypes.WORD),
|
|
('biCompression', ctypes.wintypes.DWORD),
|
|
('biSizeImage', ctypes.wintypes.DWORD),
|
|
('biXPelsPerMeter', ctypes.wintypes.LONG),
|
|
('biYPelsPerMeter', ctypes.wintypes.LONG),
|
|
('biClrUsed', ctypes.wintypes.DWORD),
|
|
('biClrImportant', ctypes.wintypes.DWORD),
|
|
]
|
|
|
|
BI_RGB = 0
|
|
DIB_RGB_COLORS = 0
|
|
|
|
memcpy = ctypes.cdll.msvcrt.memcpy
|
|
memcpy.argtypes = [ ctypes.c_void_p, ctypes.c_void_p, ctypes.c_size_t ]
|
|
|
|
CreateCompatibleDC = ctypes.windll.gdi32.CreateCompatibleDC
|
|
CreateCompatibleDC.argtypes = [ ctypes.wintypes.HDC ]
|
|
CreateCompatibleDC.restype = ctypes.wintypes.HDC
|
|
|
|
DeleteDC = ctypes.windll.gdi32.DeleteDC
|
|
DeleteDC.argtypes = [ ctypes.wintypes.HDC ]
|
|
|
|
SelectObject = ctypes.windll.gdi32.SelectObject
|
|
SelectObject.argtypes = [ ctypes.wintypes.HDC, ctypes.wintypes.HGDIOBJ ]
|
|
SelectObject.restype = ctypes.wintypes.HGDIOBJ
|
|
|
|
DeleteObject = ctypes.windll.gdi32.DeleteObject
|
|
DeleteObject.argtypes = [ ctypes.wintypes.HGDIOBJ ]
|
|
|
|
CreateDIBSection = ctypes.windll.gdi32.CreateDIBSection
|
|
CreateDIBSection.argtypes = [ ctypes.wintypes.HDC, ctypes.c_void_p, ctypes.c_uint, ctypes.POINTER(ctypes.c_void_p), ctypes.wintypes.HANDLE, ctypes.wintypes.DWORD ]
|
|
CreateDIBSection.restype = ctypes.wintypes.HBITMAP
|
|
|
|
|
|
def serialize_dib(bi, pixels):
|
|
bf = BITMAPFILEHEADER()
|
|
bf.bfType = 0x4d42
|
|
bf.bfOffBits = ctypes.sizeof(bf) + bi.biSize
|
|
bf.bfSize = bf.bfOffBits + bi.biSizeImage
|
|
bf.bfReserved1 = bf.bfReserved2 = 0
|
|
|
|
buf = (ctypes.c_byte * bf.bfSize)()
|
|
bp = ctypes.addressof(buf)
|
|
memcpy(bp, ctypes.byref(bf), ctypes.sizeof(bf))
|
|
memcpy(bp + ctypes.sizeof(bf), ctypes.byref(bi), bi.biSize)
|
|
memcpy(bp + bf.bfOffBits, pixels, bi.biSizeImage)
|
|
return bytearray(buf)
|
|
|
|
class TestImageWinPointers(PillowTestCase):
|
|
def test_pointer(self):
|
|
im = hopper()
|
|
(width, height) =im.size
|
|
opath = self.tempfile('temp.png')
|
|
imdib = ImageWin.Dib(im)
|
|
|
|
hdr = BITMAPINFOHEADER()
|
|
hdr.biSize = ctypes.sizeof(hdr)
|
|
hdr.biWidth = width
|
|
hdr.biHeight = height
|
|
hdr.biPlanes = 1
|
|
hdr.biBitCount = 32
|
|
hdr.biCompression = BI_RGB
|
|
hdr.biSizeImage = width * height * 4
|
|
hdr.biClrUsed = 0
|
|
hdr.biClrImportant = 0
|
|
|
|
hdc = CreateCompatibleDC(None)
|
|
#print('hdc:',hex(hdc))
|
|
pixels = ctypes.c_void_p()
|
|
dib = CreateDIBSection(hdc, ctypes.byref(hdr), DIB_RGB_COLORS, ctypes.byref(pixels), None, 0)
|
|
SelectObject(hdc, dib)
|
|
|
|
imdib.expose(hdc)
|
|
bitmap = serialize_dib(hdr, pixels)
|
|
DeleteObject(dib)
|
|
DeleteDC(hdc)
|
|
|
|
Image.open(BytesIO(bitmap)).save(opath)
|
|
|
|
if __name__ == '__main__':
|
|
unittest.main()
|
|
|