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Currently, when the MinFilter is GL_LINEAR or GL_NEAREST we hide the actual miplevel count from the hardware (and we avoid re-creating the miptree structure with all the levels), since we don't expect levels other than the base level to be needed. Unfortunately, GLSL's textureSize() function is an exception to this rule. This function takes a lod parameter that we need to use to return the size of the appropriate miplevel (if it exists). The spec only requires that the miplevel exists, so even if the sampler is configured with a linear or nearest MinFilter, as far as the user has uploaded miplevels for the texture, textureSize() should return the appropriate sizes. This patch fixes this by exposing the actual miplevel count for all sampling engine textures while keeping the original implementation for render targets (for render targets textures we do not provide the miplevel count but the actual LOD we are wrting to, so we want to make sure that we make this the base level). Fixes 28 dEQP tests in the following category: dEQP-GLES3.functional.shaders.texture_functions.texturesize.* Reviewed-by: Ben Widawsky <ben@bwidawsk.net> |
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File: docs/README.WIN32 Last updated: 21 June 2013 Quick Start ----- ----- Windows drivers are build with SCons. Makefiles or Visual Studio projects are no longer shipped or supported. Run scons libgl-gdi to build gallium based GDI driver. This will work both with MSVS or Mingw. Windows Drivers ------- ------- At this time, only the gallium GDI driver is known to work. Source code also exists in the tree for other drivers in src/mesa/drivers/windows, but the status of this code is unknown. Recipe ------ Building on windows requires several open-source packages. These are steps that work as of this writing. - install python 2.7 - install scons (latest) - install mingw, flex, and bison - install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get pywin32-218.4.win-amd64-py2.7.exe - install git - download mesa from git see http://www.mesa3d.org/repository.html - run scons General ------- After building, you can copy the above DLL files to a place in your PATH such as $SystemRoot/SYSTEM32. If you don't like putting things in a system directory, place them in the same directory as the executable(s). Be careful about accidentially overwriting files of the same name in the SYSTEM32 directory. The DLL files are built so that the external entry points use the stdcall calling convention. Static LIB files are not built. The LIB files that are built with are the linker import files associated with the DLL files. The si-glu sources are used to build the GLU libs. This was done mainly to get the better tessellator code. If you have a Windows-related build problem or question, please post to the mesa-dev or mesa-users list.