mirror of https://github.com/axmolengine/axmol.git
63 lines
1.7 KiB
GLSL
63 lines
1.7 KiB
GLSL
#version 310 es
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precision highp float;
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precision highp int;
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layout(location = 0) in vec2 v_texCoord;
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layout(location = 1) in vec4 v_fragmentColor;
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layout(binding = 0) uniform sampler2D u_tex0;
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layout(binding = 1) uniform sampler2D u_tex1;
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// HSV matrix
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// filter color RGB values
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layout(std140, binding = 0) uniform fs_ub {
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mat3 u_mix_hsv;
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vec3 u_filter_rgb;
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};
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vec3 rgb2hsv(vec3 c)
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{
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vec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);
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vec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));
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vec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));
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float d = q.x - min(q.w, q.y);
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float e = 1.0e-10;
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return vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);
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}
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vec3 hsv2rgb(vec3 c)
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{
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vec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);
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vec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);
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return c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);
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}
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layout(location = 0) out vec4 FragColor;
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void main()
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{
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vec4 texColor = vec4(texture(u_tex0, v_texCoord).rgb, texture(u_tex1, v_texCoord).r);
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texColor.rgb *= texColor.a; // Premultiply with Alpha channel
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vec3 rgbColor = u_mix_hsv * texColor.rgb;
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float sum = texColor.r + texColor.g + texColor.b;
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float rv = texColor.r / sum;
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float gv = texColor.g / sum;
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float bv = texColor.b / sum;
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if( (rv < u_filter_rgb.r && gv < u_filter_rgb.g && bv < u_filter_rgb.b) || texColor.a < 0.1)
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{ // color filters, resume to original color
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rgbColor = texColor.rgb;
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rgbColor.r *= v_fragmentColor.a;
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rgbColor.g *= v_fragmentColor.a;
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rgbColor.b *= v_fragmentColor.a;
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}
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rgbColor.rgb = rgbColor.rgb * v_fragmentColor.rgb;
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FragColor = vec4(rgbColor, texColor.a * v_fragmentColor.a);
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}
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