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@prism(type='fragment', name='Fast3D Fragment Shader', version='1.0.0', description='Ported shader to prism', author='Emill & Prism Team')
@{GLSL_VERSION}
@if(core_opengl || opengles)
out vec4 vOutColor;
@end
@for(i in 0..2)
@if(o_textures[i])
@{attr} vec2 vTexCoord@{i};
@for(j in 0..2)
@if(o_clamp[i][j])
@if(j == 0)
@{attr} float vTexClampS@{i};
@else
@{attr} float vTexClampT@{i};
@end
@end
@end
@end
@end
@if(o_fog) @{attr} vec4 vFog;
@if(o_grayscale) @{attr} vec4 vGrayscaleColor;
@for(i in 0..o_inputs)
@if(o_alpha)
@{attr} vec4 vInput@{i + 1};
@else
@{attr} vec3 vInput@{i + 1};
@end
@end
@if(o_textures[0]) uniform sampler2D uTex0;
@if(o_textures[1]) uniform sampler2D uTex1;
@if(o_masks[0]) uniform sampler2D uTexMask0;
@if(o_masks[1]) uniform sampler2D uTexMask1;
@if(o_blend[0]) uniform sampler2D uTexBlend0;
@if(o_blend[1]) uniform sampler2D uTexBlend1;
uniform int frame_count;
uniform float noise_scale;
uniform int texture_width[2];
uniform int texture_height[2];
uniform int texture_filtering[2];
#define TEX_OFFSET(off) @{texture}(tex, texCoord - off / texSize)
#define WRAP(x, low, high) mod((x)-(low), (high)-(low)) + (low)
float random(in vec3 value) {
float random = dot(sin(value), vec3(12.9898, 78.233, 37.719));
return fract(sin(random) * 143758.5453);
}
vec4 fromLinear(vec4 linearRGB){
bvec3 cutoff = lessThan(linearRGB.rgb, vec3(0.0031308));
vec3 higher = vec3(1.055)*pow(linearRGB.rgb, vec3(1.0/2.4)) - vec3(0.055);
vec3 lower = linearRGB.rgb * vec3(12.92);
return vec4(mix(higher, lower, cutoff), linearRGB.a);
}
vec4 filter3point(in sampler2D tex, in vec2 texCoord, in vec2 texSize) {
vec2 offset = fract(texCoord*texSize - vec2(0.5));
offset -= step(1.0, offset.x + offset.y);
vec4 c0 = TEX_OFFSET(offset);
vec4 c1 = TEX_OFFSET(vec2(offset.x - sign(offset.x), offset.y));
vec4 c2 = TEX_OFFSET(vec2(offset.x, offset.y - sign(offset.y)));
return c0 + abs(offset.x)*(c1-c0) + abs(offset.y)*(c2-c0);
}
vec4 hookTexture2D(in int id, sampler2D tex, in vec2 uv, in vec2 texSize) {
@if(o_three_point_filtering)
if(texture_filtering[id] == @{FILTER_THREE_POINT}) {
return filter3point(tex, uv, texSize);
}
@end
return @{texture}(tex, uv);
}
#define TEX_SIZE(tex) vec2(texture_width[tex], texture_height[tex])
void main() {
@for(i in 0..2)
@if(o_textures[i])
@{s = o_clamp[i][0]}
@{t = o_clamp[i][1]}
vec2 texSize@{i} = TEX_SIZE(@{i});
@if(!s && !t)
vec2 vTexCoordAdj@{i} = vTexCoord@{i};
@else
@if(s && t)
vec2 vTexCoordAdj@{i} = clamp(vTexCoord@{i}, 0.5 / texSize@{i}, vec2(vTexClampS@{i}, vTexClampT@{i}));
@elseif(s)
vec2 vTexCoordAdj@{i} = vec2(clamp(vTexCoord@{i}.s, 0.5 / texSize@{i}.s, vTexClampS@{i}), vTexCoord@{i}.t);
@else
vec2 vTexCoordAdj@{i} = vec2(vTexCoord@{i}.s, clamp(vTexCoord@{i}.t, 0.5 / texSize@{i}.t, vTexClampT@{i}));
@end
@end
vec4 texVal@{i} = hookTexture2D(@{i}, uTex@{i}, vTexCoordAdj@{i}, texSize@{i});
@if(o_masks[i])
@if(opengles)
vec2 maskSize@{i} = vec2(textureSize(uTexMask@{i}, 0));
@else
vec2 maskSize@{i} = textureSize(uTexMask@{i}, 0);
@end
vec4 maskVal@{i} = hookTexture2D(@{i}, uTexMask@{i}, vTexCoordAdj@{i}, maskSize@{i});
@if(o_blend[i])
vec4 blendVal@{i} = hookTexture2D(@{i}, uTexBlend@{i}, vTexCoordAdj@{i}, texSize@{i});
@else
vec4 blendVal@{i} = vec4(0, 0, 0, 0);
@end
texVal@{i} = mix(texVal@{i}, blendVal@{i}, maskVal@{i}.a);
@end
@end
@end
@if(o_alpha)
vec4 texel;
@else
vec3 texel;
@end
@if(o_2cyc)
@{f_range = 2}
@else
@{f_range = 1}
@end
@for(c in 0..f_range)
@if(c == 1)
@if(o_alpha)
@if(o_c[c][1][2] == SHADER_COMBINED)
texel.a = WRAP(texel.a, -1.01, 1.01);
@else
texel.a = WRAP(texel.a, -0.51, 1.51);
@end
@end
@if(o_c[c][0][2] == SHADER_COMBINED)
texel.rgb = WRAP(texel.rgb, -1.01, 1.01);
@else
texel.rgb = WRAP(texel.rgb, -0.51, 1.51);
@end
@end
@if(!o_color_alpha_same[c] && o_alpha)
texel = vec4(@{
append_formula(o_c[c], o_do_single[c][0],
o_do_multiply[c][0], o_do_mix[c][0], false, false, true, c == 0)
}, @{append_formula(o_c[c], o_do_single[c][1],
o_do_multiply[c][1], o_do_mix[c][1], true, true, true, c == 0)
});
@else
texel = @{append_formula(o_c[c], o_do_single[c][0],
o_do_multiply[c][0], o_do_mix[c][0], o_alpha, false,
o_alpha, c == 0)};
@end
@end
texel = WRAP(texel, -0.51, 1.51);
texel = clamp(texel, 0.0, 1.0);
// TODO discard if alpha is 0?
@if(o_fog)
@if(o_alpha)
texel = vec4(mix(texel.rgb, vFog.rgb, vFog.a), texel.a);
@else
texel = mix(texel, vFog.rgb, vFog.a);
@end
@end
@if(o_texture_edge && o_alpha)
if (texel.a > 0.19) texel.a = 1.0; else discard;
@end
@if(o_alpha && o_noise)
texel.a *= floor(clamp(random(vec3(floor(gl_FragCoord.xy * noise_scale), float(frame_count))) + texel.a, 0.0, 1.0));
@end
@if(o_grayscale)
float p = float(0x19);
float r = texel.r*float(0x55);
float g = texel.g*float(0x4B);
float b = texel.b*float(0x5F);
float intensity = (r+g+b) / 256.0;
intensity *= 255.0/256.0;
intensity = pow(intensity, (p * 1.5 / 256.0) + 0.25);
intensity *= 31.0/32.0;
vec3 new_texel = vGrayscaleColor.rgb * intensity;
texel.rgb = mix(texel.rgb, new_texel, vGrayscaleColor.a);
@end
@if(o_alpha)
@if(o_alpha_threshold)
if (texel.a < 8.0 / 256.0) discard;
@end
@if(o_invisible)
texel.a = 0.0;
@end
@{vOutColor} = texel;
@else
@{vOutColor} = vec4(texel, 1.0);
@end
@if(srgb_mode)
@{vOutColor} = fromLinear(@{vOutColor});
@end
}
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