Revert "start supporting backgroundColor for Cube and Mulitres panoramas"

This reverts commit 2491c2b4dc.

src/js/libpannellum.js

@@ -325,11 +325,6 @@ function Renderer(container) {
         program.texCoordLocation = gl.getAttribLocation(program, 'a_texCoord');
         gl.enableVertexAttribArray(program.texCoordLocation);
 
-        // Set background color
-        program.backgroundColor = gl.getUniformLocation(program, 'u_backgroundColor');
-        var color = params.backgroundColor ? params.backgroundColor : [0, 0, 0];
-        gl.uniform4fv(program.backgroundColor, color.concat([1]));
-
         if (imageType != 'multires') {
             // Provide texture coordinates for rectangle
             if (!texCoordBuffer)
@@ -356,6 +351,13 @@ function Renderer(container) {
             gl.uniform1f(program.v, vaov / Math.PI);
             gl.uniform1f(program.vo, voffset / Math.PI * 2);
 
+            // Set background color
+            if (imageType == 'equirectangular') {
+                program.backgroundColor = gl.getUniformLocation(program, 'u_backgroundColor');
+                var color = params.backgroundColor ? params.backgroundColor : [0, 0, 0];
+                gl.uniform4fv(program.backgroundColor, color.concat([1]));
+            }
+
             // Create texture
             program.texture = gl.createTexture();
             gl.bindTexture(glBindType, program.texture);
@@ -1285,10 +1287,7 @@ var fragEquiCubeBase = [
 var fragCube = fragEquiCubeBase + [
     // Look up color from texture
     'float cosphi = cos(phi);',
-    'if(false)', // TODO: calculate if outside image
-        'gl_FragColor = u_backgroundColor;',
-    'else',
-        'gl_FragColor = textureCube(u_imageCube, vec3(cosphi*sin(lambda), sin(phi), cosphi*cos(lambda)));',
+    'gl_FragColor = textureCube(u_imageCube, vec3(cosphi*sin(lambda), sin(phi), cosphi*cos(lambda)));',
 '}'
 ].join('\n');
 
@@ -1311,24 +1310,16 @@ var fragEquirectangular = fragEquiCubeBase + [
 
 // Fragment shader
 var fragMulti = [
-'precision mediump float;',
-
 'varying mediump vec2 v_texCoord;',
 'uniform sampler2D u_sampler;',
 //'uniform mediump vec4 u_color;',
 
-// Background color (display for partial panoramas)
-'uniform vec4 u_backgroundColor;',
-
 'void main(void) {',
     // Look up color from texture
-    'if(false)', // TODO: calculate if outside image
-        'gl_FragColor = u_backgroundColor;',
-    'else',
-        'gl_FragColor = texture2D(u_sampler, v_texCoord);',
+    'gl_FragColor = texture2D(u_sampler, v_texCoord);',
 //    'gl_FragColor = u_color;',
 '}'
-].join('\n');
+].join('');
 
 return {
     renderer: function(container, image, imagetype, dynamic) {