where is the code about rotating video
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Bang He
Feb 7, 2023, 12:12:04 PM2/7/23
to 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
Feb 7, 2023, 12:24:56 PM2/7/23
to hezha...@gmail.com, Chromium-dev
This isn't specific to video, it's just a CSS transform:
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Xianzhu Wang
Feb 7, 2023, 12:33:05 PM2/7/23
to 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
Feb 8, 2023, 2:01:00 PM2/8/23
to 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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