pc_tiantian/core/res/shaders/outline.frag

#ifdef OPENGL_ES
#ifdef GL_FRAGMENT_PRECISION_HIGH
precision highp float;
#else
precision mediump float;
#endif
#endif

uniform vec4 u_outlineColor;
// Varyings
varying vec2 v_texCoord;
uniform sampler2D u_diffuseTexture;

// alphareject
#if defined(TEXTURE_DISCARD_ALPHA)
uniform float u_alphaReject;
#endif

#if defined(MODULATE_COLOR)
uniform vec4 u_modulateColor;
#endif

#if defined(ADDITIVE_COLOR)
uniform vec4 u_additiveColor;
#endif

#if defined(BLEND_COLOR)
uniform vec4 u_blendColor;
#endif

// 描边不需要半透明
//#if defined(MODULATE_ALPHA)
//uniform float u_modulateAlpha;
//#endif


void main(void)
{
    vec4 texColor = texture2D(u_diffuseTexture, v_texCoord);
	
	#if defined(TEXTURE_DISCARD_ALPHA)
    if (texColor.a < u_alphaReject)
        discard;
	#endif

    gl_FragColor = u_outlineColor;
	
    #if defined(MODULATE_COLOR)
		gl_FragColor *= u_modulateColor;
    #endif

    #if defined(ADDITIVE_COLOR)
		gl_FragColor += u_additiveColor;
    #endif

    #if defined(BLEND_COLOR)
		gl_FragColor.rgb = mix(gl_FragColor.rgb , u_blendColor.rgb , u_blendColor.a);
    #endif

    //#if defined(MODULATE_ALPHA)
		//gl_FragColor.a *= u_modulateAlpha;
    //#endif
}