// -*- mode: c -*-

#ifdef GLSL120
attribute vec2 fragTexcoord0;
attribute vec2 fragTexcoord1
attribute vec4 fragColor0;
#else
in vec2 fragTexcoord0;
in vec2 fragTexcoord1;
in vec4 fragColor0;
#endif

#ifdef GLSL330
out vec4 fragColor;
#endif

uniform bool textured0;
uniform bool textured1;
uniform bool vertexColored;
uniform vec3 baseColorFactor;
uniform sampler2D texture0;
uniform sampler2D texture1;

void main (void) {
  vec4 finalColor = vec4(baseColorFactor, 1.0);
  // Vertex coloring.
  if(vertexColored) {
    finalColor *= fragColor0;
  }
  // Texture sampling.
  if(textured0) {
    finalColor *= texture(texture0, fragTexcoord0);
  }
  if(textured1) {
    finalColor += texture(texture1, fragTexcoord1);
  }
#ifdef GLSL330
  fragColor = finalColor;
#else
  gl_FragColor = finalColor;
#endif
}