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50 lines
2.4 KiB
50 lines
2.4 KiB
/* |
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This file is part of Magnum. |
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Copyright © 2010, 2011, 2012, 2013 Vladimír Vondruš <mosra@centrum.cz> |
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Permission is hereby granted, free of charge, to any person obtaining a |
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copy of this software and associated documentation files (the "Software"), |
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to deal in the Software without restriction, including without limitation |
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the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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and/or sell copies of the Software, and to permit persons to whom the |
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Software is furnished to do so, subject to the following conditions: |
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The above copyright notice and this permission notice shall be included |
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in all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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DEALINGS IN THE SOFTWARE. |
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*/ |
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/** @page unsupported Unsupported OpenGL features |
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Some functionality, which is either soon-to-be deprecated or isn't proven to |
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add any performance gains, is not supported in %Magnum. |
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@section unsupported-features Unsupported features |
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- Line and polygon smoothing (`GL_LINE_SMOOTH`, `GL_POLYGON_SMOOTH`) and |
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related functions are not supported, as the driver might do it in software |
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with serious performance drops. Multisampling is far superior solution. |
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- Fixed precision data types (`GL_FIXED` in OpenGL ES) are not supported, as |
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they occupy the same memory as floats and they aren't faster than floats on |
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current hardware anymore. |
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- Shader compiler is assumed to be present (`GL_SHADER_COMPILER` returning |
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true), as all desktop GL implementations and also ES3 are required to |
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support it. |
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@section unsupported-extensions Unsupported extensions |
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- @extension{INTEL,map_texture} negatively affects texture access performance. |
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Combination of buffer mapping and pixel buffers might be of the same or |
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better performance, without affecting texture access speed. |
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- @extension{NV,draw_texture} can be done with framebuffer blitting and |
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doesn't make any full-screen postprocessing easier, as shaders are excluded. |
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*/
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