85e8e9e000
When assigning uniform locations, the linker assigns each sampler uniform a sequential numerical ID. gl_shader_program::SamplerUnits maps these sampler variable IDs to the actual texture units they reference (specified via glUniform1i). Previously, we encoded this mapping in the SEND instruction encoding: the "sampler" was the texture unit number, and the binding table index was SURF_INDEX_TEXTURE(the texture unit number). This unfortunately meant that whenever the application changed the value of a sampler uniform, we had to recompile the shader to change the SEND instructions. This was horrible for the game Cogs, which repeatedly switches between using texture unit 0 and 1. It also made fragment shader precompiles useless: we'd do the precompile at glLinkShader() time, before the application called glUniform1i to set the sampler values. As soon as it did that, we'd have to recompile, wasting time and space in the program cache. This patch encodes the SamplerUnits indirection in the binding table, sampler state, and sampler default color tables. Instead of baking the texture unit number into the shader, we bake in the sampler variable ID assigned by the linker. Since those never change, we don't need to recompile programs on uniform changes. This does mean that the tables now depend on the linked shader program being used for rendering, rather than simply representing all available texture units. This could cause an increase in state emission. Another plus is that the sampler state and sampler default color tables are now compact: we only emit as many entries as there are sampler uniforms, with no holes in the table since the new sampler IDs are sequential. Previously we had to emit a full 16 entries every time, since the tables tracked the state of all active texture units. Signed-off-by: Kenneth Graunke <kenneth@whitecape.org> Acked-by: Paul Berry <stereotype441@gmail.com> Reviewed-by: Eric Anholt <eric@anholt.net> |
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| docs | ||
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| include | ||
| scons | ||
| src | ||
| .dir-locals.el | ||
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| Android.common.mk | ||
| Android.mk | ||
| Makefile.am | ||
| SConstruct | ||
| acinclude.m4 | ||
| autogen.sh | ||
| common.py | ||
| configure.ac | ||
docs/README.WIN32
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.