NAME

SYNOPSIS

DESCRIPTION

SHADER_DOMAIN_RENDERTARGET : find a rendertarget bound to image and assign the shader as the default program for objects using this rendertarget. if image does not contain a rendertarget, it is a terminal state transition.

SHADER_DOMAIN_RENDERTARGET_HARD : same as for SHADER_DOMAIN_RENDERTARGET , except all shaders on objects attached to the rendertarget will be ignored. This is useful for a temporary suspension of all shaders, as well as for rendertargets created using define_linktarget .

NOTES

1

if only the vid is provided, the active program won't be changed and the function is then used to query the active program of a video object.

2

if a string argument is supplied as the second argument, the routine will first resolve it by looking for a previously compiled shader with a name that matches the argument.

3

the shader state of all video objects are set to ' DEFAULT ' which is some platform default safe sate that follows obj_opacity and normal texturing.

EXAMPLE

function image_shader0()
      shid = build_shader(nil, [[
            void image_shader0(){
                  gl_FragColor = vec4(0.5, 1.0, 0.5, 1.0);
            }
      ]], "demoshader");
      a = fill_surface(64, 64, 0, 0, 0);
      show_image(a);
      image_shader(a, shid);
end

SEE ALSO: