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d92c7d8eed
This code was really difficult to follow, for a number of reasons:
- Queries were handled in four different ways (TIMESTAMP writes a single
value, TIME_ELAPSED writes a single pair of values, occlusion queries
write pairs of values for the start and end of each batch, and other
queries are done entirely in software. It turns out that there are
very good reasons each query is handled the way it is, but
insufficient comments explaining the rationale.
- It wasn't immediately obvious which functions were driver hooks
and which were helper functions. For example, brw_query_begin() is
a driver hook that implements glBeginQuery() for all query types, but
the similarly named brw_emit_query_begin() is a helper function that's
only relevant for occlusion queries.
Extra explanatory comments should save me and others from constantly
having to ask how this code works and why various query types are
handled differently.
v2: Incorporate Eric's feedback: change "as soon as possible" to "the
results will be present when mapped."
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
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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.