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By design pixel shaders can have up to 3 variants: * The standard one. * glDrawPixels variant. * glBitmap variant. However "shader_has_one_variant" ignores this fact, and therefore st_update_fp would select the wrong variant if glDrawPixels or glBitmap was ever called. This patch fixes the problem. If the standard variant has been created, calling glDrawPixels or glBitmap will append the variant to the second entry of the linked list, so that st_update_fp still selects the right one if shader_has_one_variant is set. If the standard variant hasn't been created yet and glDrawPixel/Bitmap has been called, st_update_fp will will see this and take the slow path instead. The standard variant will then be added at the front of the linked list, so that the next time the fast path is taken. Blender in particular is hit by this bug. v2: Marek - cosmetic changes Fixes https://bugs.freedesktop.org/show_bug.cgi?id=101596 Signed-off-by: Marek Olšák <marek.olsak@amd.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 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 https://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.