gtk/demos/gtk-demo/glarea-fragment.glsl

#version 330

out vec4 outputColor;

void main() {
  float lerpVal = gl_FragCoord.y / 500.0f;

  outputColor = mix(vec4(1.0f, 0.85f, 0.35f, 1.0f), vec4(0.2f, 0.2f, 0.2f, 1.0f), lerpVal);
}
demo: Move the GLSL shaders to resources It's easier to use them or modify them as separate files, instead of inlined inside the C source. https://bugzilla.gnome.org/show_bug.cgi?id=741946 2015-02-09 16:27:44 +00:00			`#version 330`

			`out vec4 outputColor;`

			`void main() {`
			`float lerpVal = gl_FragCoord.y / 500.0f;`

			`outputColor = mix(vec4(1.0f, 0.85f, 0.35f, 1.0f), vec4(0.2f, 0.2f, 0.2f, 1.0f), lerpVal);`
			`}`