Shader Conversion

Table of contents

1. HLSL to GLSL

HLSL to GLSL

Converting HLSL shaders to Flair GLSL shaders is quite straightforward. Here is the main syntax that needs to be changed.

1. Replace Texture2D with sampler2D
2. Replace fragment function with void main() {
3. Replace matrices
   1. Replace float2x2 with mat2
   2. Replace float3x3 with mat3
   3. Replace float4x4 with mat4
   4. Change order of elements. HLSL is row mayor, whereas GLSL is column major
4. replace float2 with vec2
5. replace float3 with vec3
6. replace float4 with vec4
7. Change Load to texelFetch
   • replace Load with texelFetch
   • replace int3 loc = int3(i.pos.xy with ivec2 loc = ivec2(gl_FragCoord.xy
8. Replace Sample with texture
   • replace Sample with texture
   • replace i.uv with f_texcoord
9. Replace return with Output =