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External work: https://github.com/revelator/The-Darkmod-Experimental/commit/d4fcae9ce064b6020a8f7e11210aab36160f2a9e https://github.com/revelator/The-Darkmod-Experimental/commit/e844559504fcd26a7061c3fa9af7c087d50a6ab9 Need to double-check and assumptions and create test assets. |
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Recent Discussion: http://forums.thedarkmod.com/topic/18280-texture-file-size-project-reduce-loading-time-and-vram-requirement/#entry393250 Key Point: If this project fails, the other option is to compress only low-detail normal maps with RxGB and encode high-detail normal maps as uncompressed DDS with mip-maps. |
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It seems that the swizzle is already disabled so RxGB cannot be used until that change is reverted. |
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RGTC may need a specific shader implementation. Perhaps use cgc to convert the GLSL implementation here: https://github.com/eXistence/fhDOOM/commit/6de59bde47824f1e678a045d91ec660a4c66247d cgc: http://http.developer.nvidia.com/Cg/cgc.html Will need to test because I am getting some (conflicting) reports that RGTC decodes in hardware to a standard RGBA image that the shader can read natively. |
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For the contingency where RGTC does not render as RGBA to the ARB bind, the best option I can think of is to create a new SL_BUMPC map type and bumpcImage with associated GL texture client then selectively populate them depending on compression args, missing images, etc. |
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Encoding details: http://ptgmedia.pearsoncmg.com/images/9780321552624/downloads/0321552628_AppK.pdf Another implementation: https://github.com/ioquake/ioq3/blob/master/code/renderergl2/tr_image_dds.c and another http://trac.openscenegraph.org/projects/osg//changeset/11710/ |
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RGTC2 (unsigned) = BC5U GL_COMPRESSED_RED_GREEN_RGTC2_EXT 0x8DBD According to GPU whiz Aras P. BC5 = ATI2N_XY https://github.com/GPUOpen-Tools/Compressonator/commit/de71057d788683a2093fc85fd78c07111aac8825 Why is this so darned unclear that even AMD has to be corrected by application devs... |
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http://forums.thedarkmod.com/topic/19064-glsl-interaction-shader/page-4#entry411600 |
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Some work done but it's not likely to be complete before 2.06 code freeze. |
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Svn rev 7444. Compression to RGTC when loading uncompressed normal maps with image_useNormalCompression = 2. I can't see significant memory usage improvements though. TODO: allow loading pre-compressed normal maps. For that I would need a test map with two bump materials: normal and precompressed for comparision. |
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Edited interaction shader to support this |
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Moving to 2.09 because the assets have not been converted yet |
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I suggest moving it to 2.10. In 2.09, all shaders are fixed to work with RGTC compression. Also, it are turned on by default. We can see how 2.09 beta goes with RGTC on, and if nobody complains about it, do assets conversion shortly after 2.09 is released. |
- Anonymous
