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1/* <copyright>
2 This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
3 No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
4 (c) Copyright 2011 Motorola Mobility, Inc. All Rights Reserved.
5 </copyright> */
6
7 /* UBERSHADER */
8/*
9 The ubershader function takes a JSON definition object and creates a jshader
10 that supports all or a subset of ubershader features. The ubershader currently
11 supports up to four per-pixel lights, optional diffuse, normal, specular, and
12 environment map textures. Lights can be directional, point, or spot lights. The
13 resulting shader is very much optimized based on the given use case, so if the
14 configuration changes, such as by adding a light, removing a texture, or even
15 changing the type of a light) then the shader needs to be rebuilt and recompiled
16 to reflect those changes.
17*/
18ubershader = function(def) {
19 var r = new XMLHttpRequest();
20 r.open('GET', "assets/shaders/ub_vshader.glsl", false);
21 r.send(null);
22 if (r.status == 200) {
23 vshader = r.responseText;
24 }
25 r.open('GET', "assets/shaders/ub_fshader.glsl", false);
26 r.send(null);
27 if (r.status == 200) {
28 fshader = r.responseText;
29 }
30 var preproc = "";
31// var paramBlock = {};
32
33// paramBlock['u_uvMatrix'] = { 'type': 'mat4' };
34
35 if (typeof def.material != 'undefined') {
36 preproc += '#define MATERIAL\n';
37 }
38 if (typeof def.lighting != 'undefined') {
39 preproc += '#define LIGHTING\n';
40 preproc += '#define SPECULAR\n';
41 for (i = 0; i < 4; ++i) {
42 var light = def.lighting['light' + i];
43 var t;
44 if (typeof light != 'undefined') {
45 switch (light.type) {
46 case 'directional': t = 0; break;
47 case 'point': t = 1; break;
48 case 'spot': t = 2; break;
49 }
50 preproc += '#define LIGHT_' + i + ' ' + t + '\n';
51 preproc += '#define LIGHT_' + i + '_SPECULAR\n';
52 }
53 }
54 }
55 if (typeof def.diffuseMap != 'undefined') {
56 preproc += '#define DIFFUSE_MAP\n';
57 }
58 if (typeof def.normalMap != 'undefined') {
59 preproc += '#define NORMAL_MAP\n';
60 }
61 if (typeof def.specularMap != 'undefined') {
62 preproc += '#define SPECULAR_MAP\n';
63 }
64 if (typeof def.environmentMap != 'undefined') {
65 preproc += '#define ENVIRONMENT_MAP\n';
66 }
67
68 // prefix preprocessor settings
69 vshader = preproc + vshader;
70 fshader = preproc + fshader;
71
72 // build output jshader
73 uberJShader = new jshader();
74 uberJShader.def = {
75 'shaders': {
76 'defaultVShader': vshader,
77 'defaultFShader': fshader
78 },
79 'techniques': {
80 'defaultTechnique': [{
81 'vshader': 'defaultVShader',
82 'fshader': 'defaultFShader',
83 'attributes': {
84 'a_pos': { 'type': 'vec3' },
85 'a_normal': { 'type': 'vec3' },
86 'a_texcoord': { 'type': 'vec2' }
87 },
88 'params': {
89 specularColor : 'u_specularColor',
90 },
91 'states': {
92 'depthEnable': true,
93 'blendEnable': false,
94 'culling': true,
95 'cullFace': "FRONT"
96 }
97 }]
98 }
99 }
100 // initialize the jshader
101 uberJShader.init();
102
103 // initialize shader parameters
104 var technique = uberJShader.defaultTechnique;
105 if (typeof def.material != 'undefined') {
106 technique.u_ambientColor.set(def.material.ambientColor);
107 technique.u_diffuseColor.set(def.material.diffuseColor);
108 if (technique.u_specularColor)
109 technique.u_specularColor.set(def.material.specularColor);
110 if (technique.u_specularPower)
111 technique.u_specularPower.set([def.material.specularPower]);
112 }
113 if (typeof def.lighting != 'undefined') {
114 for (i = 0; i < 4; ++i) {
115 var light = def.lighting["light" + i];
116 if (typeof light != "undefined") {
117 if (light.type == 'directional') {
118 paramBlock['u_light' + i + 'Dir'] = { 'type': 'vec3' };
119 technique['u_light' + i + 'Dir'].set(light['direction'] || [0, 0, 1]);
120 }
121 else if (light.type == 'spot') {
122 paramBlock['u_light' + i + 'Spot'] = { 'type': 'vec2' };
123 technique['u_light' + i + 'Position'].set(light['position'] || [0, 0, 0]);
124 var deg2Rad = Math.PI / 180;
125 technique['u_light' + i + 'Spot'].set([Math.cos((light['spotInnerCutoff'] || 45.0) * deg2Rad),
126 Math.cos((light['spotOuterCutoff'] || 90.0) * deg2Rad)]);
127 technique['u_light' + i + 'Atten'].set(light['attenuation'] || [1, 0, 0]);
128 } else {
129 technique['u_light' + i + 'Position'].set(light['position'] || [0, 0, 0]);
130 technique['u_light' + i + 'Atten'].set(light['attenuation'] || [1, 0, 0]);
131 }
132 technique['u_light' + i + 'Color'].set(light['diffuseColor'] || [1, 1, 1, 1]);
133 technique['u_light' + i + 'Specular'].set(light['specularColor'] || [1, 1, 1, 1]);
134 }
135 }
136 }
137
138 if (technique.u_uvMatrix)
139 technique.u_uvMatrix.set(def.uvTransform || mat4.identity());
140
141 renderer = g_Engine.getContext().renderer;
142 if (technique.s_diffuseMap && typeof def.diffuseMap != 'undefined') {
143 technique.s_diffuseMap.set(renderer.getTextureByName(def.diffuseMap.texture, def.diffuseMap.wrap, def.diffuseMap.mips));
144 }
145 if (technique.s_normalMap && typeof def.normalMap != 'undefined') {
146 technique.s_normalMap.set(renderer.getTextureByName(def.normalMap.texture, def.normalMap.wrap, def.normalMap.mips));
147 }
148 if (technique.s_specMap && typeof def.specularMap != 'undefined') {
149 technique.s_specMap.set(renderer.getTextureByName(def.specularMap.texture, def.specularMap.wrap));
150 }
151 if (technique.s_envMap && typeof def.environmentMap != 'undefined') {
152 technique.s_envMap.set(renderer.getTextureByName(def.environmentMap.texture, def.environmentMap.wrap));
153 }
154 if (technique.u_envReflection) {
155 technique.u_envReflection.set([def.environmentMap.envReflection || 1.0]);
156 }
157 return uberJShader;
158 }
159
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