where is the code about rotating video
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Bang He
2023年2月7日 12:12:042023/2/7
收件人 Chromium-dev
Dear all:
html:
<body>
<video autoplay controls style="transform: rotate(90deg);" src="./11.mp4" >
</video>
</body>
<video autoplay controls style="transform: rotate(90deg);" src="./11.mp4" >
</video>
</body>
The code above will rotate video.
So where is the c++ code about rotating video? i can not find it. Can you give some clues?
K. Moon
2023年2月7日 12:24:562023/2/7
收件人 hezha...@gmail.com、Chromium-dev
This isn't specific to video, it's just a CSS transform:
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Xianzhu Wang
2023年2月7日 12:33:052023/2/7
收件人 hezha...@gmail.com、Chromium-dev
The question is not easy to answer because the rotation involves almost all stages of the rendering pipeline. You can start with the paint properties. You can dump paint properties, and see
Transform (LayoutVideo VIDEO) 0x33000033e1a0 {"parent":"0x33000033e300","changed":"node-add-remove","matrix":"translate: +0 +0 +0, scale: +1 +1 +1, skew: +0 +0 +0, perspective: +0 +0 +0 +1, quaternion: +0 +0 +0.707107 +0.707107","origin":"150,75,0","compositorElementId":"(742)"}
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Bang He
2023年2月8日 14:01:002023/2/8
收件人 Chromium-dev、Xianzhu Wang、Chromium-dev、hezha...@gmail.com、km...@chromium.org
To be precise, I want to locate the code which be executed for texture/surface rotation in the gpu process.
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