回答此问题可获得 20 贡献值,回答如果被采纳可获得 50 分。
<p>我正在尝试仅使用ctypes模块捕获屏幕。不幸的是,我无法从<code>CGDataProviderCopyData</code>检索原始像素。我需要访问原始数据:</p>
<pre><code>#!/usr/bin/env python
# coding: utf-8
from sys import maxsize
from ctypes import POINTER, Structure, c_double, byref, c_void_p, c_int32, c_uint32, c_float, cdll
from ctypes.util import find_library
CGFloat = c_double if maxsize > 2 ** 32 else c_float
class CGPoint(Structure):
_fields_ = [('x', CGFloat), ('y', CGFloat)]
class CGSize(Structure):
_fields_ = [('width', CGFloat), ('height', CGFloat)]
class CGRect(Structure):
_fields_ = [('origin', CGPoint), ('size', CGSize)]
# Library
cgs = cdll.LoadLibrary(find_library('CoreGraphics'))
# Argtypes
cgs.CGGetActiveDisplayList.argtypes = [c_uint32, POINTER(c_uint32), POINTER(c_uint32)]
cgs.CGDisplayBounds.argtypes = [c_uint32]
cgs.CGRectStandardize.argtypes = [CGRect]
cgs.CGDisplayRotation.argtypes = [c_uint32]
cgs.CGWindowListCreateImage.argtypes = [CGRect, c_uint32, c_uint32, c_uint32]
cgs.CGImageGetWidth.argtypes = [c_void_p]
cgs.CGImageGetHeight.argtypes = [c_void_p]
cgs.CGImageGetDataProvider.argtypes = [c_void_p]
cgs.CGDataProviderCopyData.argtypes = [c_void_p]
cgs.CGDataProviderRelease.argtypes = [c_void_p]
# Restypes
cgs.CGGetActiveDisplayList.restype = c_int32
cgs.CGDisplayBounds.restype = CGRect
cgs.CGRectStandardize.restype = CGRect
cgs.CGDisplayRotation.restype = c_float
cgs.CGWindowListCreateImage.restype = c_void_p
cgs.CGImageGetWidth.restype = c_uint32
cgs.CGImageGetHeight.restype = c_uint32
cgs.CGImageGetDataProvider.restype = c_void_p
cgs.CGDataProviderCopyData.restype = c_void_p
cgs.CGDataProviderRelease.restype = c_void_p
# Monitors
max_displays = 32
display_count = c_uint32(0)
active_displays = (c_uint32 * max_displays)()
cgs.CGGetActiveDisplayList(max_displays, active_displays, byref(display_count))
for idx in range(display_count.value):
display = active_displays[idx]
rect = cgs.CGDisplayBounds(display)
rect = cgs.CGRectStandardize(rect)
image_ref = cgs.CGWindowListCreateImage(rect, 1, 0, 0)
width = int(cgs.CGImageGetWidth(image_ref))
height = int(cgs.CGImageGetHeight(image_ref))
prov = cgs.CGImageGetDataProvider(image_ref)
data = cgs.CGDataProviderCopyData(prov)
# How to get raw pixels from data`?
</code></pre>
<p>MacOS X版本10.11.3。你知道吗</p>
<p>Python版本2.7.10和2.6.9。你知道吗</p>