mirror of
https://github.com/ZDoom/gzdoom-gles.git
synced 2024-11-13 07:57:51 +00:00
50 lines
2.6 KiB
GLSL
50 lines
2.6 KiB
GLSL
|
|
in vec2 TexCoord;
|
|
layout(location=0) out vec4 FragColor;
|
|
|
|
layout(binding=0) uniform sampler2D InputTexture;
|
|
|
|
vec4 ApplyGamma(vec4 c)
|
|
{
|
|
vec3 valgray;
|
|
if (GrayFormula == 0)
|
|
valgray = vec3(c.r + c.g + c.b) * (1 - Saturation) / 3 + c.rgb * Saturation;
|
|
else
|
|
valgray = mix(vec3(dot(c.rgb, vec3(0.3,0.56,0.14))), c.rgb, Saturation);
|
|
vec3 val = valgray * Contrast - (Contrast - 1.0) * 0.5;
|
|
val += Brightness * 0.5;
|
|
val = pow(max(val, vec3(0.0)), vec3(InvGamma));
|
|
return vec4(val, c.a);
|
|
}
|
|
|
|
#define HALFSTEP 1./65.
|
|
float DitherMatrix[64] = float[](
|
|
0.0 / 16.0 + HALFSTEP * 1, 8.0 / 16.0 + HALFSTEP * 1, 2.0 / 16.0 + HALFSTEP * 1, 10.0 / 16.0 + HALFSTEP * 1,
|
|
0.0 / 16.0 + HALFSTEP * 3, 8.0 / 16.0 + HALFSTEP * 3, 2.0 / 16.0 + HALFSTEP * 3, 10.0 / 16.0 + HALFSTEP * 3,
|
|
12.0 / 16.0 + HALFSTEP * 1, 4.0 / 16.0 + HALFSTEP * 1, 14.0 / 16.0 + HALFSTEP * 1, 6.0 / 16.0 + HALFSTEP * 1,
|
|
12.0 / 16.0 + HALFSTEP * 3, 4.0 / 16.0 + HALFSTEP * 3, 14.0 / 16.0 + HALFSTEP * 3, 6.0 / 16.0 + HALFSTEP * 3,
|
|
3.0 / 16.0 + HALFSTEP * 1, 11.0 / 16.0 + HALFSTEP * 1, 1.0 / 16.0 + HALFSTEP * 1, 9.0 / 16.0 + HALFSTEP * 1,
|
|
3.0 / 16.0 + HALFSTEP * 3, 11.0 / 16.0 + HALFSTEP * 3, 1.0 / 16.0 + HALFSTEP * 3, 9.0 / 16.0 + HALFSTEP * 3,
|
|
15.0 / 16.0 + HALFSTEP * 1, 7.0 / 16.0 + HALFSTEP * 1, 13.0 / 16.0 + HALFSTEP * 1, 5.0 / 16.0 + HALFSTEP * 1,
|
|
15.0 / 16.0 + HALFSTEP * 3, 7.0 / 16.0 + HALFSTEP * 3, 13.0 / 16.0 + HALFSTEP * 3, 5.0 / 16.0 + HALFSTEP * 3,
|
|
0.0 / 16.0 + HALFSTEP * 4, 8.0 / 16.0 + HALFSTEP * 4, 2.0 / 16.0 + HALFSTEP * 4, 10.0 / 16.0 + HALFSTEP * 4,
|
|
0.0 / 16.0 + HALFSTEP * 2, 8.0 / 16.0 + HALFSTEP * 2, 2.0 / 16.0 + HALFSTEP * 2, 10.0 / 16.0 + HALFSTEP * 2,
|
|
12.0 / 16.0 + HALFSTEP * 4, 4.0 / 16.0 + HALFSTEP * 4, 14.0 / 16.0 + HALFSTEP * 4, 6.0 / 16.0 + HALFSTEP * 4,
|
|
12.0 / 16.0 + HALFSTEP * 2, 4.0 / 16.0 + HALFSTEP * 2, 14.0 / 16.0 + HALFSTEP * 2, 6.0 / 16.0 + HALFSTEP * 2,
|
|
3.0 / 16.0 + HALFSTEP * 4, 11.0 / 16.0 + HALFSTEP * 4, 1.0 / 16.0 + HALFSTEP * 4, 9.0 / 16.0 + HALFSTEP * 4,
|
|
3.0 / 16.0 + HALFSTEP * 2, 11.0 / 16.0 + HALFSTEP * 2, 1.0 / 16.0 + HALFSTEP * 2, 9.0 / 16.0 + HALFSTEP * 2,
|
|
15.0 / 16.0 + HALFSTEP * 4, 7.0 / 16.0 + HALFSTEP * 4, 13.0 / 16.0 + HALFSTEP * 4, 5.0 / 16.0 + HALFSTEP * 4,
|
|
15.0 / 16.0 + HALFSTEP * 2, 7.0 / 16.0 + HALFSTEP * 2, 13.0 / 16.0 + HALFSTEP * 2, 5.0 / 16.0 + HALFSTEP * 2
|
|
);
|
|
|
|
vec4 Dither(vec4 c, float colorscale)
|
|
{
|
|
ivec2 pos = ivec2(gl_FragCoord.xy) & 7;
|
|
float threshold = DitherMatrix[pos.x + (pos.y << 3)];
|
|
return vec4(floor(c.rgb * colorscale + threshold) / colorscale, c.a);
|
|
}
|
|
|
|
void main()
|
|
{
|
|
FragColor = Dither(ApplyGamma(texture(InputTexture, TexCoord)), 255.0);
|
|
}
|