src/glsl/builtins/profiles/ARB_texture_rectangle.vert

#extension GL_ARB_texture_rectangle : enable
vec4 texture2DRect(sampler2DRect sampler, vec2 coord);
vec4 texture2DRectProj(sampler2DRect sampler, vec3 coord);
vec4 texture2DRectProj(sampler2DRect sampler, vec4 coord);

vec4 shadow2DRect(sampler2DRectShadow sampler, vec3 coord);
vec4 shadow2DRectProj(sampler2DRectShadow sampler, vec4 coord);