Making it easier to work with shaders https://git.yummers.dev/slang.git/atom?h=master 2024-10-09T19:18:19+00:00 2024-10-09T19:18:19+00:00 Yong He yonghe@outlook.com 2024-10-09T19:18:19+00:00 urn:sha1:b8aab84e2c4c3e6d91d75ffcebfcc2f6e84da01c 2019-01-25T20:02:50+00:00 Tim Foley tfoleyNV@users.noreply.github.com 2019-01-25T20:02:50+00:00 urn:sha1:41fde4b836dbab627f8643a5002b2b6dd0417211 A user found that the `Texture2D<float2>.Load(...)` operation was not being compiled to GLSL properly, such that it returned a `vec4` instead of the expected `vec2`. The GLSL texture-related functions always return (and take) 4-component vectors, and we already have infrastructure in `emit.cpp` for recognizing a `$z` operator in the GLSL intrinsic definition to stand in for an appropriate swizzle based on teh number of components in the texture result type. This change just adds that `$z` operator to the GLSL code for several more texture operations (including `Load()`) that are defined on a `Texture*<T>` and that return `T`. This change doesn't try to add additional GLSL translations for texture-related operations (e.g., additional variations like `SampleCmp` that we have defined in the stdlib but not given GLSL translations for). That work still needs to be done.