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This patch introduces a partial update of GPUTexture. When rendering a large image the GPUTexture could have been scaled. The old implementation would rescale the image on CPU and create a new GPUTexture. This resulted in flooding the PCI bus. The new solution would only scale and upload the parts of the GPUTexture that has been changed. It does this by keeping track of areas of 256x256 pixels. When something changes the tiles that cover that changes will be rescaled and uploaded the next time the GPUTexture is requested. Test situation: Default Cube, 4 samples, 19200x10800 tile size 512. Blender 2.83.9: 4m27s. Blender 2.91: 20+m (regression) This patch: 1m01s. There is still room for more optimizations: * Reduce the time that an image is locked. ** Use task scheduling to update the tiles of an image. ** Generic optimization of the ImBuf scale method. Maniphest Tasks: T82591 Differential Revision: https://developer.blender.org/D9591
.. Keep this document short & concise, linking to external resources instead of including content in-line. See 'release/text/readme.html' for the end user read-me. Blender ======= Blender is the free and open source 3D creation suite. It supports the entirety of the 3D pipeline-modeling, rigging, animation, simulation, rendering, compositing, motion tracking and video editing. .. figure:: https://code.blender.org/wp-content/uploads/2018/12/springrg.jpg :scale: 50 % :align: center Project Pages ------------- - `Main Website <http://www.blender.org>`__ - `Reference Manual <https://docs.blender.org/manual/en/latest/index.html>`__ - `User Community <https://www.blender.org/community/>`__ Development ----------- - `Build Instructions <https://wiki.blender.org/wiki/Building_Blender>`__ - `Code Review & Bug Tracker <https://developer.blender.org>`__ - `Developer Forum <https://devtalk.blender.org>`__ - `Developer Documentation <https://wiki.blender.org>`__ License ------- Blender as a whole is licensed under the GNU Public License, Version 3. Individual files may have a different, but compatible license. See `blender.org/about/license <https://www.blender.org/about/license>`__ for details.