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Current implementation of ext_framebuffer_multisample_blit_scaled in i965/blorp uses nearest filtering for multisample scaled blits. Using nearest filtering produces blocky artifacts and negates the benefits of MSAA. That is the reason why extension was not enabled on i965. This patch implements the bilinear filtering of samples in blorp engine. Images generated with this patch are free from blocky artifacts and show big improvement in visual quality. Observed no piglit and gles3 regressions. V3: - Algorithm used for filtering assumes a rectangular grid of samples roughly corresponding to sample locations. - Test the boundary conditions on the edges of texture. V4: - Clip texcoords and use conditional MOVs. - Send texture dimensions as push constants. - Remove the optimization in case of scaled multisample blits. V5: - Move mcs_fetch() inside the 'for' loop after computing pixel coordinates. Signed-off-by: Anuj Phogat <anuj.phogat@gmail.com> Acked-by: Chris Forbes <chrisf@ijw.co.nz> Reviewed-by: Paul Berry <stereotype441@gmail.com> |
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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 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. Recipe ------ Building on windows requires several open-source packages. These are steps that work as of this writing. 1) install python 2.7 2) install scons (latest) 3) install mingw, flex, and bison 4) install libxml2 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get libxml2-python-2.9.1.win-amd64-py2.7.exe 5) install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get pywin32-218.4.win-amd64-py2.7.exe 6) install git 7) download mesa from git see http://www.mesa3d.org/repository.html 8) 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.