最近在学Shader，做了一个简单的根据uv0距离判断边框实现矩形描边效果；实际表现在模拟器（引擎自带的）、creator编辑器内都是正常的展示了描边效果；但是运行到浏览器内，整个sprite就全部是描边的颜色了。困扰了很久，没能解决;特发帖求助
- Creator 版本： 3.8.3
- 目标平台： Microsoft Edge
Shader代码：
// Copyright (c) 2017-2020 Xiamen Yaji Software Co., Ltd.
CCEffect %{
techniques:
- passes:
- vert: sprite-vs:vert
frag: sprite-fs:frag
depthStencilState:
depthTest: false
depthWrite: false
blendState:
targets:
- blend: true
blendSrc: src_alpha
blendDst: one_minus_src_alpha
blendDstAlpha: one_minus_src_alpha
rasterizerState:
cullMode: none
properties:
alphaThreshold: { value: 0.5 }
borderColor: { value: [0.0, 0.0, 0.0, 1.0], editor: { type: color } }
}%
CCProgram sprite-vs %{
precision highp float;
#include <builtin/uniforms/cc-global>
#if USE_LOCAL
#include <builtin/uniforms/cc-local>
#endif
#if SAMPLE_FROM_RT
#include <common/common-define>
#endif
in vec3 a_position;
in vec2 a_texCoord;
in vec4 a_color;
out vec4 color;
out vec2 uv0;
vec4 vert () {
vec4 pos = vec4(a_position, 1);
#if USE_LOCAL
pos = cc_matWorld * pos;
#endif
#if USE_PIXEL_ALIGNMENT
pos = cc_matView * pos;
pos.xyz = floor(pos.xyz);
pos = cc_matProj * pos;
#else
pos = cc_matViewProj * pos;
#endif
uv0 = a_texCoord;
#if SAMPLE_FROM_RT
CC_HANDLE_RT_SAMPLE_FLIP(uv0);
#endif
color = a_color;
return pos;
}
}%
CCProgram sprite-fs %{
precision highp float;
#include <builtin/internal/embedded-alpha>
#include <builtin/internal/alpha-test>
in vec4 color;
uniform Constant {
vec4 borderColor;
};
#if USE_TEXTURE
in vec2 uv0;
#pragma builtin(local)
layout(set = 2, binding = 12) uniform sampler2D cc_spriteTexture;
#endif
vec4 frag () {
vec4 o = vec4(1, 1, 1, 1);
bool isEdge = false;
#if USE_TEXTURE
o *= texture(cc_spriteTexture, uv0);
#if IS_GRAY
float gray = 0.2126 * o.r + 0.7152 * o.g + 0.0722 * o.b;
o.r = o.g = o.b = gray;
#endif
#endif
isEdge = (uv0.x >=0.0 && uv0.x < 0.05) || (uv0.x > 0.95 && uv0.x <= 1.0) || (uv0.y >= 0.0 && uv0.y < 0.05) || (uv0.y > 0.95 && uv0.y <= 1.0);
if(isEdge){
o *= borderColor;
}else{
o *= color;
}
ALPHA_TEST(o);
return o;
}
}%
- 效果截图：
编辑器内：
实际运行时：
