Shader   xtlang


Defined in:  https://github.com/digego/extempore/tree/v0.8.9/libs/external/gl/gl-objects2.xtm

Implementation

(bind-func Shader
  "create (and compile) an OpenGL shader"
  (lambda (source:String* type:GLenum)
    (if (not (or (= type GL_VERTEX_SHADER)
                 (= type GL_FRAGMENT_SHADER)
                 (= type GL_GEOMETRY_SHADER)))
        (begin (println "Error: shader type must be one of GL_VERTEX_SHADER, GL_FRAGMENT_SHADER or GL_GEOMETRY_SHADER")
               null)
        (let ((shader_id (glCreateShader type))
              (source_ptr:i8** (salloc))
              (shader (Shader:[Shader*,i32,i32]* shader_id type)))
          (pset! source_ptr 0 (cstring source))
          (glShaderSource shader_id 1 source_ptr (cast null i32*))
          (glCompileShader shader_id)
          (println 'Shader: shader)
          (gl_print_error "Error compiling shader")
          shader))))


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