bgfx/examples/common/font/fs_font_distance_field.sc
2013-06-03 23:16:02 -07:00

22 lines
495 B
Python

$input v_color0, v_texcoord0
#include "../../common/common.sh"
SAMPLERCUBE(u_texColor, 0);
uniform float u_inverse_gamma;
void main()
{
vec4 color = textureCube(u_texColor, v_texcoord0.xyz);
int index = int(v_texcoord0.w*4.0 + 0.5);
float distance = color.bgra[index];
float dx = length(dFdx(v_texcoord0.xyz) );
float dy = length(dFdy(v_texcoord0.xyz) );
float w = 16.0*0.5*(dx+dy);
float a = smoothstep(0.5-w, 0.5+w, distance);
gl_FragColor = vec4(v_color0.rgb, v_color0.a*a);
}