Paul Berry
3ec0e55b63
When rendering to a miplevel other than 0 within a color, depth, stencil, or HiZ buffer, we need to tell the GPU to render to an offset within the buffer, so that the data is written into the correct miplevel. We do this using a coarse offset (in pages), and a fine adjustment (the so-called "tile_x" and "tile_y" values, which are measured in pixels). We have always computed the coarse offset and fine adjustment using intel_renderbuffer_tile_offsets() function. This worked fine for color and combined depth/stencil buffers, but failed to work properly when HiZ and separate stencil were in use. It failed to work because there is only one set of fine adjustment controls shared by the HiZ, depth, and stencil buffers, so we need to choose tile_x and tile_y values that are compatible with the tiling of all three buffers, and then compute separate coarse offsets for each buffer. This patch fixes the HiZ and separate stencil case by replacing the call to intel_renderbuffer_tile_offsets() with calls to two functions: intel_region_get_tile_masks(), which determines how much of the adjustment can be performed using offsets and how much can be performed using tile_x and tile_y, and intel_region_get_aligned_offset(), which computes the coarse offset. intel_region_get_tile_offsets() is still used for color renderbuffers, so to avoid code duplication, I've re-worked it to use intel_region_get_tile_masks() and intel_region_get_aligned_offset(). On i965 Gen6, fixes piglit tests "texturing/depthstencil-render-miplevels 1024 X" where X is one of (depth, depth_and_stencil, depth_stencil_single_binding, depth_x, depth_x_and_stencil, stencil, stencil_and_depth, stencil_and_depth_x). On i965 Gen7, the variants of "texturing/depthstencil-render-miplevels" that contain a stencil buffer still fail, due to another problem: Gen7 seems to ignore the 3 LSB's of the tile_y adjustment (and possibly also tile_x). v2: Removed spurious comments. Added assertions to check preconditions of intel_region_get_aligned_offset(). Reviewed-by: Chad Versace <chad.versace@linux.intel.com> Acked-by: Kenneth Graunke <kenneth@whitecape.org>
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.