mirror of https://github.com/axmolengine/axmol.git
33 lines
882 B
GLSL
33 lines
882 B
GLSL
|
#version 310 es
|
||
|
|
precision highp float;
|
||
|
|
|
||
|
|
// GLES2 not support const float, will trigger error:
|
||
|
|
// a vertex attribute index out of boundary is detected
|
||
|
|
#define thickness 0.15
|
||
|
|
|
||
|
|
layout(location = COLOR0) in vec4 v_color;
|
||
|
|
layout(location = TEXCOORD0) in vec2 v_texCoord;
|
||
|
|
|
||
|
|
layout(binding = 0) uniform sampler2D u_tex0;
|
||
|
|
|
||
|
|
layout(std140) uniform fs_ub {
|
||
|
|
vec4 u_textColor;
|
||
|
|
vec4 u_effectColor;
|
||
|
|
};
|
||
|
|
|
||
|
|
layout(location = SV_Target0) out vec4 FragColor;
|
||
|
|
|
||
|
|
void main()
|
||
|
|
{
|
||
|
|
float dist = texture(u_tex0, v_texCoord).x;
|
||
|
|
#ifdef GLES2
|
||
|
|
float smoothing = 0.04;
|
||
|
|
#else
|
||
|
|
float smoothing = fwidth(dist);
|
||
|
|
#endif
|
||
|
|
float pivot = abs(0.5 - thickness * u_effectColor.w);
|
||
|
|
float alpha = smoothstep(pivot - smoothing, pivot + smoothing, dist);
|
||
|
|
float border = smoothstep(0.5 - smoothing, 0.5 + smoothing, dist);
|
||
|
|
FragColor = vec4( mix(u_effectColor.xyz, u_textColor.rgb, border), alpha);
|
||
|
|
}
|