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我的代码允许用户在 pygame 屏幕的一部分上绘图。我希望能够提取屏幕这一部分的所有RGB 像素值并将它们转换为 3d 数组,如下所示:

top_left = [50, 50]
bottom_right = [100, 100]
pixel_data = SomeFunctionToGetPixelData(screen, top_left, bottom_right)

# get RGB value for pixel that was at position (53, 51) on the screen
print(pixel_data[3][1])
> [255, 255, 255]

最好的方法是什么?

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1 回答 1

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从屏幕的部分创建一个次表面。次表面与其新父级共享其像素(请参阅 参考资料pygame.Surface.subsurface):

w = bottom_right[0] - top_left[0]
h = bottom_right[1] - top_left[1]
area = pygame.Rect(top_left[0], top_left[1], w, h)
sub_surface = screen.subsurface(area)

用于pygame.surfarray.array3d()将像素从Surface复制到 3D 数组中:

pixel_data = pygame.surfarray.array3d(sub_surface)

最小功能:

def get_pixel_data(surf, top_left, bottom_right):
    w = bottom_right[0] - top_left[0]
    h = bottom_right[1] - top_left[1]
    sub_surface = surf.subsurface(pygame.Rect(*top_left, w, h))
    return pygame.surfarray.array3d(sub_surface)
于 2021-07-16T20:16:05.743 回答