mkxp/shader/plane.frag

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uniform sampler2D texture;
uniform lowp vec4 tone;
uniform lowp float opacity;
uniform lowp vec4 color;
uniform lowp vec4 flash;
varying vec2 v_texCoord;
const vec3 lumaF = vec3(.299, .587, .114);
void main()
{
/* Sample source color */
vec4 frag = texture2D(texture, v_texCoord);
/* Apply gray */
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);
gl_FragColor = frag;
}