diff options
Diffstat (limited to 'src/osd/modules/render/bgfx/shaders/chains/lcd-grid/fs_lcd-grid.sc')
-rw-r--r-- | src/osd/modules/render/bgfx/shaders/chains/lcd-grid/fs_lcd-grid.sc | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/src/osd/modules/render/bgfx/shaders/chains/lcd-grid/fs_lcd-grid.sc b/src/osd/modules/render/bgfx/shaders/chains/lcd-grid/fs_lcd-grid.sc new file mode 100644 index 00000000000..801d1a2e9a4 --- /dev/null +++ b/src/osd/modules/render/bgfx/shaders/chains/lcd-grid/fs_lcd-grid.sc @@ -0,0 +1,106 @@ +$input v_color0, v_texcoord0 + +// license:GPL-2.0+ +// copyright-holders:cgwg + +#include "common.sh" + +SAMPLER2D(s_tex, 0); + +uniform vec4 u_tex_size0; +uniform vec4 u_quad_dims; +uniform vec4 u_rsubpix; +uniform vec4 u_gsubpix; +uniform vec4 u_bsubpix; +uniform vec4 u_gain; +uniform vec4 u_LCDgamma; +uniform vec4 u_blacklevel; +uniform vec4 u_ambient; +uniform vec4 u_BGR; +uniform vec4 u_monitorgamma; +uniform vec4 u_subpixsize; + +vec3 fetch_offset(vec2 coord, vec2 offset) +{ + vec2 x = coord + offset; + vec3 col = texture2D(s_tex, x).rgb; + vec3 col2 = pow(vec3_splat(u_gain.x) * col + vec3_splat(u_blacklevel.x), vec3_splat(u_LCDgamma.x)) + vec3_splat(u_ambient.x); + // want zero for outside pixels + vec4 b = step(0.0,vec4(x.x,x.y,1.0-x.x,1.0-x.y)); + return vec3_splat(b.x*b.y*b.z*b.w) * col2; +} + +float intsmear_func(float z, float c1, float c2, float c3, float c4, float c5, float c6) +{ + float z2 = z*z; + // both cases have c0=1 + return z * (1.0 + z2*(c1 + z2*(c2 + z2*(c3 + z2*(c4 + z2*(c5 + z2*c6)))))); +} + +float intsmear_fx(float z) +{ + // integral of (1 - x^2 - x^4 + x^6)^2 + return intsmear_func(z, -2.0/3.0, -1.0/5.0, 4.0/7.0, -1.0/9.0, -2.0/11.0, 1.0/13.0); +} + +float intsmear_fy(float z) +{ + // integral of (1 - 2x^4 + x^6)^2 + return intsmear_func(z, 0.0, -4.0/5.0, 2.0/7.0, 4.0/9.0, -4.0/11.0, 1.0/13.0); +} + +float intsmear_x(float x, float dx, float d) +{ + float zl = clamp((x-dx*0.5)/d,-1.0,1.0); + float zh = clamp((x+dx*0.5)/d,-1.0,1.0); + return d * ( intsmear_fx(zh) - intsmear_fx(zl) )/dx; +} +float intsmear_y(float x, float dx, float d) +{ + float zl = clamp((x-dx*0.5)/d,-1.0,1.0); + float zh = clamp((x+dx*0.5)/d,-1.0,1.0); + return d * ( intsmear_fy(zh) - intsmear_fy(zl) )/dx; +} + +void main() +{ + vec3 cr = pow(u_rsubpix.rgb, vec3_splat(u_monitorgamma.x)); + vec3 cg = pow(u_gsubpix.rgb, vec3_splat(u_monitorgamma.x)); + vec3 cb = pow(u_bsubpix.rgb, vec3_splat(u_monitorgamma.x)); + + vec2 tl = v_texcoord0 * u_tex_size0.xy - vec2(0.5,0.5); + vec2 tli = floor(tl); + float subpix = fract(tl.x) * 3.0; + float rsubpix = u_tex_size0.x / u_quad_dims.x * 3.0; + + vec3 lcol, rcol; + lcol = vec3(intsmear_x(subpix+1.0, rsubpix, 3.0*u_subpixsize.x), + intsmear_x(subpix , rsubpix, 3.0*u_subpixsize.x), + intsmear_x(subpix-1.0, rsubpix, 3.0*u_subpixsize.x)); + rcol = vec3(intsmear_x(subpix-2.0, rsubpix, 3.0*u_subpixsize.x), + intsmear_x(subpix-3.0, rsubpix, 3.0*u_subpixsize.x), + intsmear_x(subpix-4.0, rsubpix, 3.0*u_subpixsize.x)); + + if (u_BGR.x > 0.5) { + lcol.rgb = lcol.bgr; + rcol.rgb = rcol.bgr; + } + + float tcol, bcol; + subpix = fract(tl.y); + rsubpix = u_tex_size0.y / u_quad_dims.y; + tcol = intsmear_y(subpix ,rsubpix, u_subpixsize.y); + bcol = intsmear_y(subpix-1.0,rsubpix, u_subpixsize.y); + + tl = (tli + vec2_splat(0.5)) / u_tex_size0.xy; + vec2 one = vec2_splat(1.0) / u_tex_size0.xy; + + vec3 ul = fetch_offset(tl, vec2(0,0) ) * lcol * vec3_splat(tcol); + vec3 br = fetch_offset(tl, one ) * rcol * vec3_splat(bcol); + vec3 bl = fetch_offset(tl, vec2(0,one.y)) * lcol * vec3_splat(bcol); + vec3 ur = fetch_offset(tl, vec2(one.x,0)) * rcol * vec3_splat(tcol); + + vec3 csum = ul + br + bl + ur; + vec3 col = mul(mtxFromCols(u_rsubpix.rgb, u_gsubpix.rgb, u_bsubpix.rgb), csum); + gl_FragColor = vec4(pow(col, vec3_splat(1.0/u_monitorgamma.x)), 1.0); +} |