Eric Anholt
2ea3ab14f2
Drivers will probably want to be able to take UBO references in a
shader like:
uniform ubo1 {
float a;
float b;
float c;
float d;
}
void main() {
gl_FragColor = vec4(a, b, c, d);
}
and generate a single aligned vec4 load out of the UBO. For intel,
this involves recognizing the shared offset of the aligned loads and
CSEing them out. Obviously that involves breaking things down to
loads from an offset from a particular UBO first. Thus, the driver
doesn't want to see
variable_ref(ir_variable("a")),
and even more so does it not want to see
array_ref(record_ref(variable_ref(ir_variable("a")),
"field1"), variable_ref(ir_variable("i"))).
where a.field1[i] is a row_major matrix.
Instead, we're going to make a lowering pass to break UBO references
down to expressions that are obvious to codegen, and amenable to
merging through CSE.
v2: Fix some partial thoughts in the ir_binop comment (review by Kenneth)
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-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.