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This patch implements varying packing between varyings. Previously, each varying occupied components 0 through N-1 of its assigned varying slot, so there was no way to pack two varyings into the same slot. For example, if the varyings were a float, a vec2, a vec3, and another vec2, they would be stored as follows: <----slot1----> <----slot2----> <----slot3----> <----slot4----> slots * * * * * * * * * * * * * * * * flt x x x <vec2-> x x <--vec3---> x <vec2-> x x varyings (Each * represents a varying component, and the "x"s represent wasted space). This change packs the varyings together to eliminate wasted space between varyings, like so: <----slot1----> <----slot2----> <----slot3----> <----slot4----> slots * * * * * * * * * * * * * * * * <vec2-> <vec2-> flt <--vec3---> x x x x x x x x varyings Note that we take advantage of the sort order introduced in previous patches (vec4's first, then vec2's, then scalars, then vec3's) to minimize how often a varying is "double parked" (split across varying slots). Reviewed-by: Eric Anholt <eric@anholt.net> v2: Skip varying packing if ctx->Const.DisableVaryingPacking is true. |
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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.