Iago Toral Quiroga
7f10e1678e
If scratch space is needed for a shader stage we try to reuse the last scratch buffer bound to that stage. If we can't, we free the old scratch buffer and allocate a new one. This means we always keep the last scratch buffer for a particular shader stage around for the entire life span of the context. These buffers are being reported by Valgrind as definitely lost after destroying the OpenGL context. For example, for the geometry shader stage: ==18350== 248 bytes in 1 blocks are definitely lost in loss record 85 of 150 ==18350== at 0x4C2CC70: calloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==18350== by 0xA1B35D6: drm_intel_gem_bo_alloc_internal (intel_bufmgr_gem.c:724) ==18350== by 0xA1B383F: drm_intel_gem_bo_alloc (intel_bufmgr_gem.c:794) ==18350== by 0xA1AEFA3: drm_intel_bo_alloc (intel_bufmgr.c:52) ==18350== by 0x9D08E31: brw_get_scratch_bo (brw_program.c:226) ==18350== by 0x9D2A0F2: do_gs_prog (brw_vec4_gs.c:280) ==18350== by 0x9D2A635: brw_gs_precompile (brw_vec4_gs.c:401) ==18350== by 0x9D14F68: brw_shader_precompile(gl_context*, gl_shader_program*) (brw_shader.cpp:76) ==18350== by 0x9D157B8: brw_link_shader (brw_shader.cpp:269) ==18350== by 0x9B0941E: _mesa_glsl_link_shader (ir_to_mesa.cpp:3038) ==18350== by 0x99AE4ED: link_program (shaderapi.c:917) ==18350== by 0x99AF365: _mesa_LinkProgram (shaderapi.c:1385) So make sure that by the time we destroy the context we check if we have live scratch buffers for the various stages and release them if that is the case. Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
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 osmesa to build classic osmesa driver; 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. 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.