ged/shaders/free_font.frag

#version 330 core

#define FONT_WIDTH 128
#define FONT_HEIGHT 64
#define FONT_COLS 18
#define FONT_ROWS 7
#define FONT_CH_W (FONT_WIDTH  / FONT_COLS)
#define FONT_CH_H (FONT_HEIGHT / FONT_ROWS)
#define FONT_CH_W_UV (float(FONT_CH_W) / float(FONT_WIDTH))
#define FONT_CH_H_UV (float(FONT_CH_H) / float(FONT_HEIGHT))

uniform sampler2D font;
uniform float time;
uniform vec2 resolution;

flat in int glyph_c;
in vec4 glyph_fg_color;
in vec4 glyph_bg_color;
in vec2 uv;

float map01(float x)
{
	return (x + 1) / 2;
}

vec3 hsl2rgb( in vec3 c )
{
	vec3 rgb = clamp( abs(mod(c.x*6.0+vec3(0.0,4.0,2.0),6.0)-3.0)-1.0,
			  0.0, 1.0 );

	return c.z + c.y * (rgb-0.5)*(1.0-abs(2.0*c.z-1.0));
}

void main() {
	gl_FragColor = vec4(1,0,0,1);
}