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Previously we would generate uniform locations as (slot << 16) + array_index. We do this to handle applications that assume the location of a[2] will be +1 from the location of a[1]. This resulted in every uniform location being at least 0x10000. The OpenGL 4.3 spec was amended to require this behavior, but previous versions did not require locations of array (or structure) members be sequential. We've now encountered two applications that assume uniform values will be "small." As far as we can tell, these applications store the GLint returned by glGetUniformLocation in a int16_t or possibly an int8_t. THIS BEHAVIOR IS NOT GUARANTEED OR IMPLIED BY ANY VERSION OF OpenGL. Other implementations happen to have both these behaviors (sequential array elements and small values) since OpenGL 2.0, so let's just match their behavior. Fixes "3D Bowling" on Android. NOTE: This is a candidate for stable release branches. Signed-off-by: Ian Romanick <ian.d.romanick@intel.com> Reviewed-by: Brian Paul <brianp@vmware.com> Reviewed-and-tested-by: Chad Versace <chad.versace@linux.intel.com> |
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File: docs/README.WIN32 Last updated: 23 April 2011 Quick Start ----- ----- Windows drivers are build with SCons. Makefiles or Visual Studio projects are no longer shipped or supported. Run scons osmesa mesagdi to build classic mesa Windows GDI drivers; or 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. 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.