java – Mac上的GLSL Shader Error,但不是Windows：无法从’co

我是着色器的新手,我昨天开始和他们中的一些玩弄.它们在我的Windows PC上正常编译,但是当它们在Mac上运行时,两者都有错误：

ERROR: 0:14: ‘=’ : cannot convert from ‘const int’ to ‘4-component
vector of float’

在Android上只有第二个着色器给我一个错误.它有一个错误,提到没有匹配的功能点重载.

它们使用相同的顶点着色器：

attribute vec4 a_position;
attribute vec4 a_color;
attribute vec2 a_texCoord0;

uniform mat4 u_projTrans;

varying vec4 vColor;
varying vec2 vTexCoord;

void main() {
    vColor = a_color;
    vTexCoord = a_texCoord0;
    gl_Position =  u_projTrans * a_position;
}

一个片段着色器(Mac上出错)：

#ifdef GL_ES
#define LOWP lowp
precision mediump float;
#else
#define LOWP
#endif

varying LOWP vec4 vColor;
varying vec2 vTexCoord; 
uniform sampler2D u_texture;
void main() {
    vec4 texColor = texture2D(u_texture,vTexCoord); 
    texColor.rgb = 1.0 - texColor.rgb;
    gl_FragColor = texColor * vColor;
}

另一个Fragment Shader(mac和android上的错误)：

#ifdef GL_ES
#define LOWP lowp
precision mediump float;
#else
#define LOWP
#endif

varying LOWP vec4 vColor;
varying vec2 vTexCoord; 
uniform sampler2D u_texture;            
void main() {
    vec4 texColor = texture2D(u_texture,vTexCoord); 
    vec3 gray = vec3(0.2125,0.7154,0.0721);
    vec4 color = dot(gray,texColor);
    color.a = texColor.a;
    gl_FragColor = color * vColor;
}