289 lines
14 KiB
GLSL
289 lines
14 KiB
GLSL
const float kernel_bias = -0.234377;
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const float kernel_scale = 1.241974;
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uniform sampler2D u_kernel;
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vec4 filter1D_radius1(sampler2D kernel, float index, float x, vec4 c0, vec4 c1) {
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float w;
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float w_sum = 0.0;
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vec4 r = vec4(0.0,0.0,0.0,0.0);
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w = texture(kernel, vec2(0.000000+(x/1.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c0 * w;
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w = texture(kernel, vec2(1.000000-(x/1.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r + c1 * w;
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return r;
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}
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vec4 filter2D_radius1(sampler2D _texture, sampler2D kernel, float index, vec2 uv, vec2 pixel) {
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vec2 texel = uv/pixel - vec2(0.5,0.5) ;
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vec2 f = fract(texel);
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texel = (texel-fract(texel)+vec2(0.001,0.001))*pixel;
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vec4 t0 = filter1D_radius1(kernel, index, f.x,
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texture(_texture, texel + vec2(0,0)*pixel),
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texture(_texture, texel + vec2(1,0)*pixel));
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vec4 t1 = filter1D_radius1(kernel, index, f.x,
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texture(_texture, texel + vec2(0,1)*pixel),
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texture(_texture, texel + vec2(1,1)*pixel));
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return filter1D_radius1(kernel, index, f.y, t0, t1);
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}
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vec4 filter1D_radius2(sampler2D kernel, float index, float x, vec4 c0, vec4 c1, vec4 c2, vec4 c3) {
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float w;
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float w_sum = 0.0;
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vec4 r = vec4(0.0,0.0,0.0,0.0);
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w = texture(kernel, vec2(0.500000+(x/2.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c0 * w;
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w = texture(kernel, vec2(0.500000-(x/2.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c2 * w;
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w = texture(kernel, vec2(0.000000+(x/2.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c1 * w;
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w = texture(kernel, vec2(1.000000-(x/2.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c3 * w;
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return r;
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}
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vec4 filter2D_radius2(sampler2D _texture, sampler2D kernel, float index, vec2 uv, vec2 pixel) {
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vec2 texel = uv/pixel - vec2(0.5,0.5) ;
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vec2 f = fract(texel);
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texel = (texel-fract(texel)+vec2(0.001,0.001))*pixel;
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vec4 t0 = filter1D_radius2(kernel, index, f.x,
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texture(_texture, texel + vec2(-1,-1)*pixel),
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texture(_texture, texel + vec2(0,-1)*pixel),
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texture(_texture, texel + vec2(1,-1)*pixel),
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texture(_texture, texel + vec2(2,-1)*pixel));
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vec4 t1 = filter1D_radius2(kernel, index, f.x,
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texture(_texture, texel + vec2(-1,0)*pixel),
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texture(_texture, texel + vec2(0,0)*pixel),
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texture(_texture, texel + vec2(1,0)*pixel),
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texture(_texture, texel + vec2(2,0)*pixel));
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vec4 t2 = filter1D_radius2(kernel, index, f.x,
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texture(_texture, texel + vec2(-1,1)*pixel),
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texture(_texture, texel + vec2(0,1)*pixel),
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texture(_texture, texel + vec2(1,1)*pixel),
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texture(_texture, texel + vec2(2,1)*pixel));
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vec4 t3 = filter1D_radius2(kernel, index, f.x,
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texture(_texture, texel + vec2(-1,2)*pixel),
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texture(_texture, texel + vec2(0,2)*pixel),
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texture(_texture, texel + vec2(1,2)*pixel),
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texture(_texture, texel + vec2(2,2)*pixel));
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return filter1D_radius2(kernel, index, f.y, t0, t1, t2, t3);
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}
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vec4 filter1D_radius3(sampler2D kernel, float index, float x, vec4 c0, vec4 c1, vec4 c2, vec4 c3, vec4 c4, vec4 c5) {
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float w;
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float w_sum = 0.0;
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vec4 r = vec4(0.0,0.0,0.0,0.0);
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w = texture(kernel, vec2(0.666667+(x/3.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c0 * w;
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w = texture(kernel, vec2(0.333333-(x/3.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c3 * w;
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w = texture(kernel, vec2(0.333333+(x/3.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c1 * w;
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w = texture(kernel, vec2(0.666667-(x/3.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c4 * w;
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w = texture(kernel, vec2(0.000000+(x/3.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c2 * w;
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w = texture(kernel, vec2(1.000000-(x/3.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c5 * w;
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return r;
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}
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vec4 filter2D_radius3(sampler2D _texture, sampler2D kernel, float index, vec2 uv, vec2 pixel) {
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vec2 texel = uv/pixel - vec2(0.5,0.5) ;
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vec2 f = fract(texel);
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texel = (texel-fract(texel)+vec2(0.001,0.001))*pixel;
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vec4 t0 = filter1D_radius3(kernel, index, f.x,
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texture(_texture, texel + vec2(-2,-2)*pixel),
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texture(_texture, texel + vec2(-1,-2)*pixel),
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texture(_texture, texel + vec2(0,-2)*pixel),
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texture(_texture, texel + vec2(1,-2)*pixel),
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texture(_texture, texel + vec2(2,-2)*pixel),
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texture(_texture, texel + vec2(3,-2)*pixel));
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vec4 t1 = filter1D_radius3(kernel, index, f.x,
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texture(_texture, texel + vec2(-2,-1)*pixel),
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texture(_texture, texel + vec2(-1,-1)*pixel),
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texture(_texture, texel + vec2(0,-1)*pixel),
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texture(_texture, texel + vec2(1,-1)*pixel),
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texture(_texture, texel + vec2(2,-1)*pixel),
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texture(_texture, texel + vec2(3,-1)*pixel));
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vec4 t2 = filter1D_radius3(kernel, index, f.x,
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texture(_texture, texel + vec2(-2,0)*pixel),
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texture(_texture, texel + vec2(-1,0)*pixel),
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texture(_texture, texel + vec2(0,0)*pixel),
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texture(_texture, texel + vec2(1,0)*pixel),
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texture(_texture, texel + vec2(2,0)*pixel),
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texture(_texture, texel + vec2(3,0)*pixel));
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vec4 t3 = filter1D_radius3(kernel, index, f.x,
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texture(_texture, texel + vec2(-2,1)*pixel),
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texture(_texture, texel + vec2(-1,1)*pixel),
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texture(_texture, texel + vec2(0,1)*pixel),
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texture(_texture, texel + vec2(1,1)*pixel),
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texture(_texture, texel + vec2(2,1)*pixel),
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texture(_texture, texel + vec2(3,1)*pixel));
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vec4 t4 = filter1D_radius3(kernel, index, f.x,
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texture(_texture, texel + vec2(-2,2)*pixel),
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texture(_texture, texel + vec2(-1,2)*pixel),
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texture(_texture, texel + vec2(0,2)*pixel),
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texture(_texture, texel + vec2(1,2)*pixel),
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texture(_texture, texel + vec2(2,2)*pixel),
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texture(_texture, texel + vec2(3,2)*pixel));
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vec4 t5 = filter1D_radius3(kernel, index, f.x,
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texture(_texture, texel + vec2(-2,3)*pixel),
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texture(_texture, texel + vec2(-1,3)*pixel),
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texture(_texture, texel + vec2(0,3)*pixel),
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texture(_texture, texel + vec2(1,3)*pixel),
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texture(_texture, texel + vec2(2,3)*pixel),
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texture(_texture, texel + vec2(3,3)*pixel));
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return filter1D_radius3(kernel, index, f.y, t0, t1, t2, t3, t4, t5);
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}
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vec4 filter1D_radius4(sampler2D kernel, float index, float x, vec4 c0, vec4 c1, vec4 c2, vec4 c3, vec4 c4, vec4 c5, vec4 c6, vec4 c7) {
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float w;
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float w_sum = 0.0;
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vec4 r = vec4(0.0,0.0,0.0,0.0);
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w = texture(kernel, vec2(0.750000+(x/4.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c0 * w;
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w = texture(kernel, vec2(0.250000-(x/4.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c4 * w;
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w = texture(kernel, vec2(0.500000+(x/4.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c1 * w;
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w = texture(kernel, vec2(0.500000-(x/4.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c5 * w;
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w = texture(kernel, vec2(0.250000+(x/4.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c2 * w;
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w = texture(kernel, vec2(0.750000-(x/4.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c6 * w;
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w = texture(kernel, vec2(0.000000+(x/4.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c3 * w;
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w = texture(kernel, vec2(1.000000-(x/4.0),index) ).r;
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w = w*kernel_scale + kernel_bias;
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r = r+ c7 * w;
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return r;
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}
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vec4 filter2D_radius4(sampler2D _texture, sampler2D kernel, float index, vec2 uv, vec2 pixel) {
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vec2 texel = uv/pixel - vec2(0.5,0.5) ;
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vec2 f = fract(texel);
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texel = (texel-fract(texel)+vec2(0.001,0.001))*pixel;
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vec4 t0 = filter1D_radius4(kernel, index, f.x,
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texture(_texture, texel + vec2(-3,-3)*pixel),
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texture(_texture, texel + vec2(-2,-3)*pixel),
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texture(_texture, texel + vec2(-1,-3)*pixel),
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texture(_texture, texel + vec2(0,-3)*pixel),
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texture(_texture, texel + vec2(1,-3)*pixel),
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texture(_texture, texel + vec2(2,-3)*pixel),
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texture(_texture, texel + vec2(3,-3)*pixel),
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texture(_texture, texel + vec2(4,-3)*pixel));
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vec4 t1 = filter1D_radius4(kernel, index, f.x,
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texture(_texture, texel + vec2(-3,-2)*pixel),
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texture(_texture, texel + vec2(-2,-2)*pixel),
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texture(_texture, texel + vec2(-1,-2)*pixel),
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texture(_texture, texel + vec2(0,-2)*pixel),
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texture(_texture, texel + vec2(1,-2)*pixel),
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texture(_texture, texel + vec2(2,-2)*pixel),
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texture(_texture, texel + vec2(3,-2)*pixel),
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texture(_texture, texel + vec2(4,-2)*pixel));
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vec4 t2 = filter1D_radius4(kernel, index, f.x,
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texture(_texture, texel + vec2(-3,-1)*pixel),
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texture(_texture, texel + vec2(-2,-1)*pixel),
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texture(_texture, texel + vec2(-1,-1)*pixel),
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texture(_texture, texel + vec2(0,-1)*pixel),
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texture(_texture, texel + vec2(1,-1)*pixel),
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texture(_texture, texel + vec2(2,-1)*pixel),
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texture(_texture, texel + vec2(3,-1)*pixel),
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texture(_texture, texel + vec2(4,-1)*pixel));
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vec4 t3 = filter1D_radius4(kernel, index, f.x,
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texture(_texture, texel + vec2(-3,0)*pixel),
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texture(_texture, texel + vec2(-2,0)*pixel),
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texture(_texture, texel + vec2(-1,0)*pixel),
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texture(_texture, texel + vec2(0,0)*pixel),
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texture(_texture, texel + vec2(1,0)*pixel),
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texture(_texture, texel + vec2(2,0)*pixel),
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texture(_texture, texel + vec2(3,0)*pixel),
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texture(_texture, texel + vec2(4,0)*pixel));
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vec4 t4 = filter1D_radius4(kernel, index, f.x,
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texture(_texture, texel + vec2(-3,1)*pixel),
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texture(_texture, texel + vec2(-2,1)*pixel),
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texture(_texture, texel + vec2(-1,1)*pixel),
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texture(_texture, texel + vec2(0,1)*pixel),
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texture(_texture, texel + vec2(1,1)*pixel),
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texture(_texture, texel + vec2(2,1)*pixel),
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texture(_texture, texel + vec2(3,1)*pixel),
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texture(_texture, texel + vec2(4,1)*pixel));
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vec4 t5 = filter1D_radius4(kernel, index, f.x,
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texture(_texture, texel + vec2(-3,2)*pixel),
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texture(_texture, texel + vec2(-2,2)*pixel),
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texture(_texture, texel + vec2(-1,2)*pixel),
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texture(_texture, texel + vec2(0,2)*pixel),
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texture(_texture, texel + vec2(1,2)*pixel),
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texture(_texture, texel + vec2(2,2)*pixel),
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texture(_texture, texel + vec2(3,2)*pixel),
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texture(_texture, texel + vec2(4,2)*pixel));
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vec4 t6 = filter1D_radius4(kernel, index, f.x,
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texture(_texture, texel + vec2(-3,3)*pixel),
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texture(_texture, texel + vec2(-2,3)*pixel),
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texture(_texture, texel + vec2(-1,3)*pixel),
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texture(_texture, texel + vec2(0,3)*pixel),
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texture(_texture, texel + vec2(1,3)*pixel),
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texture(_texture, texel + vec2(2,3)*pixel),
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texture(_texture, texel + vec2(3,3)*pixel),
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texture(_texture, texel + vec2(4,3)*pixel));
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vec4 t7 = filter1D_radius4(kernel, index, f.x,
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texture(_texture, texel + vec2(-3,4)*pixel),
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texture(_texture, texel + vec2(-2,4)*pixel),
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texture(_texture, texel + vec2(-1,4)*pixel),
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texture(_texture, texel + vec2(0,4)*pixel),
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texture(_texture, texel + vec2(1,4)*pixel),
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texture(_texture, texel + vec2(2,4)*pixel),
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texture(_texture, texel + vec2(3,4)*pixel),
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texture(_texture, texel + vec2(4,4)*pixel));
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return filter1D_radius4(kernel, index, f.y, t0, t1, t2, t3, t4, t5, t6, t7);
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}
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vec4 Nearest(sampler2D _texture, vec2 shape, vec2 uv) { return texture(_texture,uv); }
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vec4 Bilinear(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius1(_texture, u_kernel, 0.031250, uv, 1.0/shape); }
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vec4 Hanning(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius1(_texture, u_kernel, 0.093750, uv, 1.0/shape); }
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vec4 Hamming(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius1(_texture, u_kernel, 0.156250, uv, 1.0/shape); }
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vec4 Hermite(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius1(_texture, u_kernel, 0.218750, uv, 1.0/shape); }
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vec4 Kaiser(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius1(_texture, u_kernel, 0.281250, uv, 1.0/shape); }
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vec4 Quadric(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius2(_texture, u_kernel, 0.343750, uv, 1.0/shape); }
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vec4 Bicubic(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius2(_texture, u_kernel, 0.406250, uv, 1.0/shape); }
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vec4 CatRom(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius2(_texture, u_kernel, 0.468750, uv, 1.0/shape); }
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vec4 Mitchell(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius2(_texture, u_kernel, 0.531250, uv, 1.0/shape); }
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vec4 Spline16(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius2(_texture, u_kernel, 0.593750, uv, 1.0/shape); }
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vec4 Spline36(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius3(_texture, u_kernel, 0.656250, uv, 1.0/shape); }
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vec4 Gaussian(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius2(_texture, u_kernel, 0.718750, uv, 1.0/shape); }
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vec4 Bessel(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius4(_texture, u_kernel, 0.781250, uv, 1.0/shape); }
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vec4 Sinc(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius4(_texture, u_kernel, 0.843750, uv, 1.0/shape); }
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vec4 Lanczos(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius4(_texture, u_kernel, 0.906250, uv, 1.0/shape); }
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vec4 Blackman(sampler2D _texture, vec2 shape, vec2 uv) { return filter2D_radius4(_texture, u_kernel, 0.968750, uv, 1.0/shape); } |