From 2476c035ec15d3ee22239ebd1fe10e6e8c1e01e3 Mon Sep 17 00:00:00 2001 From: Tim Foley Date: Tue, 18 Jul 2017 14:51:12 -0700 Subject: Add a compile-time loop construct to Slang The basic syntax is: $for(i in Range(0,99)) { /* stuff goes here */ } Note that the exact form is very restrictive. All that you are allowed to change is `i`, `0`, `99` or `/* stuff goes here */`. As a tiny bit of syntax sugar, the following should work: $for(i in Range(99)) { /* stuff goes here */ } Note that the range given is half-open (C++ iterator `[begin,end)` style). Both the beginning and end of the range must be compile-time constant expressions that Slang knows how to constant-fold. The implementation will basically generate code for `/* stuff goes here */` N times, once for each value in the half-open range. Each time, the variable `i` will be replaced with a different compile-time-constant expression. While I was working on a test case for this, I also found that our build of glslang had an issue with resource limits, so I fixed that. Clients will need to build a new glslang to use the fix. --- source/slang/slang-stdlib.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'source/slang/slang-stdlib.cpp') diff --git a/source/slang/slang-stdlib.cpp b/source/slang/slang-stdlib.cpp index 3062112c6..b26fc8a8e 100644 --- a/source/slang/slang-stdlib.cpp +++ b/source/slang/slang-stdlib.cpp @@ -1603,7 +1603,7 @@ namespace Slang if( baseShape != TextureType::ShapeCube ) { - sb << "__intrinsic(glsl, \"textureOffset($p, $1)\")\n"; + sb << "__intrinsic(glsl, \"textureOffset($p, $1, $2)\")\n"; sb << "__intrinsic\n"; sb << "T Sample(SamplerState s, "; sb << "float" << kBaseTextureTypes[tt].coordCount + isArray << " location, "; -- cgit v1.2.3