QImage，QPixmap的，QBitmap，QPicture的区别

Qt provides four classes for handling image data: QImage, QPixmap, QBitmap and QPicture.



Qt提供了4种类型类操作图像数据：QImage，QPixmap的，QBitmap和QPicture。

[b]QImage is designed and optimized for I/O,
[b]and for direct pixel access and manipulation,
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QImage是为[b]I /
O设计和优化的，为了直接的像素访问和操作，

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while QPixmap is designed and optimized for showing images on screen.
[b]QBitmap is only

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[b]然而[b]QPixmap是为在屏幕上现实图片设计和优化的，[b]QBitmap只是是继承[b][b]QPixmap[/b][/b][/b]

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[b]a convenience class that inherits QPixmap,
ensuring a depth of 1. The isQBitmap() function

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的一个易使用的类，保证了深度为1，[b] isQBitmap()
函数当对象是真的bitmap返回true

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returns true if a QPixmap object is really a bitmap, otherwise returns false. Finally, the QPicture

否则反悔false，最后[b] QPicture类

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class is a paint device that records and replays QPainter commands.

[b]QPicture类是绘制设备，主要用来记录和回放QPainter命令

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