【cocos2d-x 2.x 学习与应用总结】12: cocos2d-x预定义shader源码

前言

本文把cocos2d-x 2.x版本中预定义的所有shader源码贴出来，便于集中参考。作者的引擎版本是2.2.3.

下面以ccShaders.h中定义的片段着色器变量名作为标题，逐条列出。(为什么不用顶点着色器的变量名，因为有几个shader只有片段着色器变量名)

ccPosition_uColor_frag

ccShader_Position_uColor_vert.h

attribute vec4 a_position;                          uniform vec4 u_color;                               uniform float u_pointSize;                          #ifdef GL_ES                                        varying lowp vec4 v_fragmentColor;                  #else                                               varying vec4 v_fragmentColor;                       #endif                                              void main()                                         {                                                       gl_Position = CC_MVPMatrix * a_position;            gl_PointSize = u_pointSize;                         v_fragmentColor = u_color;                      }                                                   

ccShader_Position_uColor_frag.h

#ifdef GL_ES                            precision lowp float;                   #endif                                  varying vec4 v_fragmentColor;           void main()                             {                                           gl_FragColor = v_fragmentColor;     }                                       

ccPositionColor_frag

ccShader_PositionColor_vert.h

attribute vec4 a_position;                              attribute vec4 a_color;                                 #ifdef GL_ES                                            varying lowp vec4 v_fragmentColor;                      #else                                                   varying vec4 v_fragmentColor;                           #endif                                                  void main()                                             {                                                           gl_Position = CC_MVPMatrix * a_position;                v_fragmentColor = a_color;                          }                                                       

ccShader_PositionColor_frag.h

#ifdef GL_ES                                        precision lowp float;                               #endif                                              varying vec4 v_fragmentColor;                       void main()                                         {                                                       gl_FragColor = v_fragmentColor;                 }                                                   

ccPositionTexture_frag

ccShader_PositionTexture_vert.h

attribute vec4 a_position;                              attribute vec2 a_texCoord;                              #ifdef GL_ES                                            varying mediump vec2 v_texCoord;                        #else                                                   varying vec2 v_texCoord;                                #endif                                                  void main()                                             {                                                           gl_Position = CC_MVPMatrix * a_position;                v_texCoord = a_texCoord;                            }                                                       

ccShader_PositionTexture_frag.h

#ifdef GL_ES                                                            precision lowp float;                                                   #endif                                                                  varying vec2 v_texCoord;                                                uniform sampler2D CC_Texture0;                                          void main()                                                             {                                                                           gl_FragColor =  texture2D(CC_Texture0, v_texCoord);                 }                                                                       

ccPositionTextureA8Color_frag

ccShader_PositionTextureA8Color_vert.h

attribute vec4 a_position;                          attribute vec2 a_texCoord;                          attribute vec4 a_color;                             #ifdef GL_ES                                        varying lowp vec4 v_fragmentColor;                  varying mediump vec2 v_texCoord;                    #else                                               varying vec4 v_fragmentColor;                       varying vec2 v_texCoord;                            #endif                                              void main()                                         {                                                       gl_Position = CC_MVPMatrix * a_position;            v_fragmentColor = a_color;                          v_texCoord = a_texCoord;                        }                                                   

ccShader_PositionTextureA8Color_frag.h

#ifdef GL_ES                                        precision lowp float;                               #endif                                              varying vec4 v_fragmentColor;                       varying vec2 v_texCoord;                            uniform sampler2D CC_Texture0;                      void main()                                         {                                                       gl_FragColor = vec4( v_fragmentColor.rgb,                                       // RGB from uniform                                      v_fragmentColor.a * texture2D(CC_Texture0, v_texCoord).a   // A from texture & uniform                            );                           }

ccPositionTextureColor_frag

ccShader_PositionTextureColor_vert.h

attribute vec4 a_position;                          attribute vec2 a_texCoord;                          attribute vec4 a_color;                             #ifdef GL_ES                                        varying lowp vec4 v_fragmentColor;                  varying mediump vec2 v_texCoord;                    #else                                               varying vec4 v_fragmentColor;                       varying vec2 v_texCoord;                            #endif                                              void main()                                         {                                                       gl_Position = CC_MVPMatrix * a_position;            v_fragmentColor = a_color;                          v_texCoord = a_texCoord;                        }                                                   

ccShader_PositionTextureColor_frag.h

#ifdef GL_ES                                precision lowp float;                       #endif                                      varying vec4 v_fragmentColor;               varying vec2 v_texCoord;                    uniform sampler2D CC_Texture0;              void main()                                 {                                               gl_FragColor = v_fragmentColor * texture2D(CC_Texture0, v_texCoord);}                                           

ccPositionTextureColorAlphaTest_frag

ccShader_PositionTextureColorAlphaTest_frag.h

#ifdef GL_ES                                                precision lowp float;                                       #endif                                                      varying vec4 v_fragmentColor;                               varying vec2 v_texCoord;                                    uniform sampler2D CC_Texture0;                              uniform float CC_alpha_value;                               void main()                                                 {                                                               vec4 texColor = texture2D(CC_Texture0, v_texCoord);         // mimic: glAlphaFunc(GL_GREATER)                           // pass if ( incoming_pixel >= CC_alpha_value ) => fail if incoming_pixel < CC_alpha_value    if ( texColor.a <= CC_alpha_value )                             discard;                                                gl_FragColor = texColor * v_fragmentColor;              }                                                           

ccPositionTexture_uColor_frag

ccShader_PositionTexture_uColor_vert.h

attribute vec4 a_position;          attribute vec2 a_texCoord;          #ifdef GL_ES                        varying mediump vec2 v_texCoord;    #else                               varying vec2 v_texCoord;            #endif                              void main()                         {                                       gl_Position = CC_MVPMatrix * a_position;    v_texCoord = a_texCoord;        }                                   

ccShader_PositionTexture_uColor_frag.h

#ifdef GL_ES                            precision lowp float;                   #endif                                  uniform     vec4 u_color;               varying vec2 v_texCoord;                uniform sampler2D CC_Texture0;          void main()                             {                                           gl_FragColor =  texture2D(CC_Texture0, v_texCoord) * u_color;}                                       

ccExSwitchMask_frag

ccShaderEx_SwitchMask_frag.h

#ifdef GL_ES                                     precision lowp float;                            #endif                                           varying vec4        v_fragmentColor;             varying vec2        v_texCoord;                  uniform sampler2D   u_texture;                   uniform sampler2D   u_mask;                      void main()                                      {                                                    vec4 texColor   = texture2D(u_texture, v_texCoord);                                          vec4 maskColor  = texture2D(u_mask, v_texCoord);                                             vec4 finalColor = vec4(texColor.r, texColor.g, texColor.b, maskColor.a * texColor.a);        gl_FragColor    = v_fragmentColor * finalColor;                                          }                                                                                            

ccPositionColorLengthTexture_frag

ccShader_PositionColorLengthTexture_vert.h

#ifdef GL_ES                                                        attribute mediump vec4 a_position;                                  attribute mediump vec2 a_texcoord;                                  attribute mediump vec4 a_color;                                     varying mediump vec4 v_color;                                       varying mediump vec2 v_texcoord;                                    #else                                                               attribute vec4 a_position;                                          attribute vec2 a_texcoord;                                          attribute vec4 a_color;                                             varying vec4 v_color;                                               varying vec2 v_texcoord;                                            #endif                                                              void main()                                                         {                                                                       v_color = vec4(a_color.rgb * a_color.a, a_color.a);                 v_texcoord = a_texcoord;                                            gl_Position = CC_MVPMatrix * a_position;                        }                                                                   

ccShader_PositionColorLengthTexture_frag.h

#ifdef GL_ES                                                                                                                // #extension GL_OES_standard_derivatives : enable                                                                          varying mediump vec4 v_color;                                                                                               varying mediump vec2 v_texcoord;                                                                                            #else                                                                                                                       varying vec4 v_color;                                                                                                       varying vec2 v_texcoord;                                                                                                    #endif                                                                                                                      void main()                                                                                                                 {                                                                                                                           // #if defined GL_OES_standard_derivatives                                                                                      // gl_FragColor = v_color*smoothstep(0.0, length(fwidth(v_texcoord)), 1.0 - length(v_texcoord));                        // #else                                                                                                                        gl_FragColor = v_color*step(0.0, 1.0 - length(v_texcoord));                                                             // #endif                                                                                                                   }                                                                                                                           

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作者水平有限，对相关知识的理解和总结难免有错误，还望给予指正，非常感谢！

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