mkxp-freebird/shader/sprite.frag

44 lines
855 B
GLSL

uniform sampler2D texture;
uniform vec4 tone;
uniform float opacity;
uniform vec4 color;
uniform vec4 flash;
uniform float bushDepth;
uniform float bushOpacity;
const vec3 lumaF = { .299, .587, .114 };
void main()
{
vec2 coor = gl_TexCoord[0].xy;
/* Sample source color */
vec4 frag = texture2D(texture, coor);
/* Apply gray */
const float luma = dot(frag.rgb, lumaF);
frag.rgb = mix(frag.rgb, vec3(luma), tone.w);
/* Apply tone */
frag.rgb += tone.rgb;
/* Apply opacity */
frag.a *= opacity;
/* Apply color */
frag.rgb = mix(frag.rgb, color.rgb, color.a);
/* Apply flash */
frag.rgb = mix(frag.rgb, flash.rgb, flash.a);
/* Apply bush alpha by mathematical if */
float underBush = float(coor.y < bushDepth);
frag.a *= clamp(bushOpacity + underBush, 0, 1);
gl_FragColor = frag;
}