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Diffstat (limited to 'libvo/vo_gl3_shaders.glsl')
| -rw-r--r-- | libvo/vo_gl3_shaders.glsl | 316 |
1 files changed, 316 insertions, 0 deletions
diff --git a/libvo/vo_gl3_shaders.glsl b/libvo/vo_gl3_shaders.glsl new file mode 100644 index 0000000000..f67e55e6f5 --- /dev/null +++ b/libvo/vo_gl3_shaders.glsl @@ -0,0 +1,316 @@ +/* + * This file is part of mplayer2. + * + * mplayer2 is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * mplayer2 is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with mplayer2; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +// Note that this file is not directly passed as shader, but run through some +// text processing functions, and in fact contains multiple vertex and fragment +// shaders. + +// inserted at the beginning of all shaders +#!section prelude +#!section vertex_all +uniform mat3 transform; +uniform sampler3D lut_3d; + +in vec2 vertex_position; +in vec4 vertex_color; +out vec4 color; +in vec2 vertex_texcoord; +out vec2 texcoord; + +void main() { + vec3 position = vec3(vertex_position, 1); +#ifndef FIXED_SCALE + position = transform * position; +#endif + gl_Position = vec4(position, 1); + color = vertex_color; +#ifdef USE_3DLUT + color = vec4(texture(lut_3d, color.rgb).rgb, color.a); +#endif + texcoord = vertex_texcoord; +} + +#!section frag_eosd +uniform sampler2D texture1; + +in vec2 texcoord; +in vec4 color; +out vec4 out_color; + +void main() { + out_color = vec4(color.rgb, color.a * texture(texture1, texcoord).r); +} + +#!section frag_osd +uniform sampler2D texture1; + +in vec2 texcoord; +in vec4 color; +out vec4 out_color; + +void main() { + out_color = texture(texture1, texcoord).rrrg * color; +} + +#!section frag_video +uniform sampler2D texture1; +uniform sampler2D texture2; +uniform sampler2D texture3; +uniform sampler1D lut_c_1d; +uniform sampler1D lut_l_1d; +uniform sampler2D lut_c_2d; +uniform sampler2D lut_l_2d; +uniform sampler3D lut_3d; +uniform sampler2D dither; +uniform mat4x3 colormatrix; +uniform vec3 inv_gamma; +uniform float conv_gamma; +uniform float dither_quantization; +uniform float dither_multiply; +uniform float filter_param1; + +in vec2 texcoord; +out vec4 out_color; + +vec4 sample_bilinear(sampler2D tex, vec2 texcoord) { + return texture(tex, texcoord); +} + +// Explanation how bicubic scaling with only 4 texel fetches is done: +// http://www.mate.tue.nl/mate/pdfs/10318.pdf +// 'Efficient GPU-Based Texture Interpolation using Uniform B-Splines' +// Explanation why this algorithm normally always blurs, even with unit scaling: +// http://bigwww.epfl.ch/preprints/ruijters1001p.pdf +// 'GPU Prefilter for Accurate Cubic B-spline Interpolation' +vec4 calcweights(float s) { + vec4 t = vec4(-0.5, 0.1666, 0.3333, -0.3333) * s + vec4(1, 0, -0.5, 0.5); + t = t * s + vec4(0, 0, -0.5, 0.5); + t = t * s + vec4(-0.6666, 0, 0.8333, 0.1666); + vec2 a = vec2(1 / t.z, 1 / t.w); + t.xy = t.xy * a + vec2(1, 1); + t.x = t.x + s; + t.y = t.y - s; + return t; +} + +vec4 sample_bicubic_fast(sampler2D tex, vec2 texcoord) { + vec2 texsize = textureSize(tex, 0); + vec2 pt = 1 / texsize; + vec2 fcoord = fract(texcoord * texsize + vec2(0.5, 0.5)); + vec4 parmx = calcweights(fcoord.x); + vec4 parmy = calcweights(fcoord.y); + vec4 cdelta; + cdelta.xz = parmx.rg * vec2(-pt.x, pt.x); + cdelta.yw = parmy.rg * vec2(-pt.y, pt.y); + // first y-interpolation + vec4 ar = texture(tex, texcoord + cdelta.xy); + vec4 ag = texture(tex, texcoord + cdelta.xw); + vec4 ab = mix(ag, ar, parmy.b); + // second y-interpolation + vec4 br = texture(tex, texcoord + cdelta.zy); + vec4 bg = texture(tex, texcoord + cdelta.zw); + vec4 aa = mix(bg, br, parmy.b); + // x-interpolation + return mix(aa, ab, parmx.b); +} + +float[2] weights2(sampler1D lookup, float f) { + vec4 c = texture(lookup, f); + return float[2](c.r, c.g); +} + +float[4] weights4(sampler1D lookup, float f) { + vec4 c = texture(lookup, f); + return float[4](c.r, c.g, c.b, c.a); +} + +float[6] weights6(sampler2D lookup, float f) { + vec4 c1 = texture(lookup, vec2(0.25, f)); + vec4 c2 = texture(lookup, vec2(0.75, f)); + return float[6](c1.r, c1.g, c1.b, c2.r, c2.g, c2.b); +} + +float[8] weights8(sampler2D lookup, float f) { + vec4 c1 = texture(lookup, vec2(0.25, f)); + vec4 c2 = texture(lookup, vec2(0.75, f)); + return float[8](c1.r, c1.g, c1.b, c1.a, c2.r, c2.g, c2.b, c2.a); +} + +float[12] weights12(sampler2D lookup, float f) { + vec4 c1 = texture(lookup, vec2(1.0/6.0, f)); + vec4 c2 = texture(lookup, vec2(0.5, f)); + vec4 c3 = texture(lookup, vec2(5.0/6.0, f)); + return float[12](c1.r, c1.g, c1.b, c1.a, + c2.r, c2.g, c2.b, c2.a, + c3.r, c3.g, c3.b, c3.a); +} + +float[16] weights16(sampler2D lookup, float f) { + vec4 c1 = texture(lookup, vec2(0.125, f)); + vec4 c2 = texture(lookup, vec2(0.375, f)); + vec4 c3 = texture(lookup, vec2(0.625, f)); + vec4 c4 = texture(lookup, vec2(0.875, f)); + return float[16](c1.r, c1.g, c1.b, c1.a, c2.r, c2.g, c2.b, c2.a, + c3.r, c3.g, c3.b, c3.a, c4.r, c4.g, c4.b, c4.a); +} + +#define CONVOLUTION_SEP_N(NAME, N) \ + vec4 NAME(sampler2D tex, vec2 texcoord, vec2 pt, float weights[N]) { \ + vec4 res = vec4(0); \ + for (int n = 0; n < N; n++) { \ + res += weights[n] * texture(tex, texcoord + pt * n); \ + } \ + return res; \ + } + +CONVOLUTION_SEP_N(convolution_sep2, 2) +CONVOLUTION_SEP_N(convolution_sep4, 4) +CONVOLUTION_SEP_N(convolution_sep6, 6) +CONVOLUTION_SEP_N(convolution_sep8, 8) +CONVOLUTION_SEP_N(convolution_sep12, 12) +CONVOLUTION_SEP_N(convolution_sep16, 16) + +// The dir parameter is (0, 1) or (1, 0), and we expect the shader compiler to +// remove all the redundant multiplications and additions. +#define SAMPLE_CONVOLUTION_SEP_N(NAME, N, SAMPLERT, CONV_FUNC, WEIGHTS_FUNC)\ + vec4 NAME(vec2 dir, SAMPLERT lookup, sampler2D tex, vec2 texcoord) { \ + vec2 texsize = textureSize(tex, 0); \ + vec2 pt = (1 / texsize) * dir; \ + float fcoord = dot(fract(texcoord * texsize - 0.5), dir); \ + vec2 base = texcoord - fcoord * pt; \ + return CONV_FUNC(tex, base - pt * (N / 2 - 1), pt, \ + WEIGHTS_FUNC(lookup, fcoord)); \ + } + +SAMPLE_CONVOLUTION_SEP_N(sample_convolution_sep2, 2, sampler1D, convolution_sep2, weights2) +SAMPLE_CONVOLUTION_SEP_N(sample_convolution_sep4, 4, sampler1D, convolution_sep4, weights4) +SAMPLE_CONVOLUTION_SEP_N(sample_convolution_sep6, 6, sampler2D, convolution_sep6, weights6) +SAMPLE_CONVOLUTION_SEP_N(sample_convolution_sep8, 8, sampler2D, convolution_sep8, weights8) +SAMPLE_CONVOLUTION_SEP_N(sample_convolution_sep12, 12, sampler2D, convolution_sep12, weights12) +SAMPLE_CONVOLUTION_SEP_N(sample_convolution_sep16, 16, sampler2D, convolution_sep16, weights16) + + +#define CONVOLUTION_N(NAME, N) \ + vec4 NAME(sampler2D tex, vec2 texcoord, vec2 pt, float taps_x[N], \ + float taps_y[N]) { \ + vec4 res = vec4(0); \ + for (int y = 0; y < N; y++) { \ + vec4 line = vec4(0); \ + for (int x = 0; x < N; x++) \ + line += taps_x[x] * texture(tex, texcoord + pt * vec2(x, y));\ + res += taps_y[y] * line; \ + } \ + return res; \ + } + +CONVOLUTION_N(convolution2, 2) +CONVOLUTION_N(convolution4, 4) +CONVOLUTION_N(convolution6, 6) +CONVOLUTION_N(convolution8, 8) +CONVOLUTION_N(convolution12, 12) +CONVOLUTION_N(convolution16, 16) + +#define SAMPLE_CONVOLUTION_N(NAME, N, SAMPLERT, CONV_FUNC, WEIGHTS_FUNC) \ + vec4 NAME(SAMPLERT lookup, sampler2D tex, vec2 texcoord) { \ + vec2 texsize = textureSize(tex, 0); \ + vec2 pt = 1 / texsize; \ + vec2 fcoord = fract(texcoord * texsize - 0.5); \ + vec2 base = texcoord - fcoord * pt; \ + return CONV_FUNC(tex, base - pt * (N / 2 - 1), pt, \ + WEIGHTS_FUNC(lookup, fcoord.x), \ + WEIGHTS_FUNC(lookup, fcoord.y)); \ + } + +SAMPLE_CONVOLUTION_N(sample_convolution2, 2, sampler1D, convolution2, weights2) +SAMPLE_CONVOLUTION_N(sample_convolution4, 4, sampler1D, convolution4, weights4) +SAMPLE_CONVOLUTION_N(sample_convolution6, 6, sampler2D, convolution6, weights6) +SAMPLE_CONVOLUTION_N(sample_convolution8, 8, sampler2D, convolution8, weights8) +SAMPLE_CONVOLUTION_N(sample_convolution12, 12, sampler2D, convolution12, weights12) +SAMPLE_CONVOLUTION_N(sample_convolution16, 16, sampler2D, convolution16, weights16) + + +// Unsharp masking +vec4 sample_sharpen3(sampler2D tex, vec2 texcoord) { + vec2 texsize = textureSize(tex, 0); + vec2 pt = 1 / texsize; + vec2 st = pt * 0.5; + vec4 p = texture(tex, texcoord); + vec4 sum = texture(tex, texcoord + st * vec2(+1, +1)) + + texture(tex, texcoord + st * vec2(+1, -1)) + + texture(tex, texcoord + st * vec2(-1, +1)) + + texture(tex, texcoord + st * vec2(-1, -1)); + return p + (p - 0.25 * sum) * filter_param1; +} + +vec4 sample_sharpen5(sampler2D tex, vec2 texcoord) { + vec2 texsize = textureSize(tex, 0); + vec2 pt = 1 / texsize; + vec2 st1 = pt * 1.2; + vec4 p = texture(tex, texcoord); + vec4 sum1 = texture(tex, texcoord + st1 * vec2(+1, +1)) + + texture(tex, texcoord + st1 * vec2(+1, -1)) + + texture(tex, texcoord + st1 * vec2(-1, +1)) + + texture(tex, texcoord + st1 * vec2(-1, -1)); + vec2 st2 = pt * 1.5; + vec4 sum2 = texture(tex, texcoord + st2 * vec2(+1, 0)) + + texture(tex, texcoord + st2 * vec2( 0, +1)) + + texture(tex, texcoord + st2 * vec2(-1, 0)) + + texture(tex, texcoord + st2 * vec2( 0, -1)); + vec4 t = p * 0.859375 + sum2 * -0.1171875 + sum1 * -0.09765625; + return p + t * filter_param1; +} + +void main() { +#ifdef USE_PLANAR + vec3 color = vec3(SAMPLE_L(texture1, texcoord).r, + SAMPLE_C(texture2, texcoord).r, + SAMPLE_C(texture3, texcoord).r); +#else + vec3 color = SAMPLE_L(texture1, texcoord).rgb; +#endif +#ifdef USE_GBRP + color.gbr = color; +#endif +#ifdef USE_YGRAY + // NOTE: actually slightly wrong for 16 bit input video, and completely + // wrong for 9/10 bit input + color.gb = vec2(128.0/255.0); +#endif +#ifdef USE_COLORMATRIX + color = mat3(colormatrix) * color + colormatrix[3]; +#endif +#ifdef USE_LINEAR_CONV + color = pow(color, vec3(2.2)); +#endif +#ifdef USE_LINEAR_CONV_INV + // Convert from linear RGB to gamma RGB before putting it through the 3D-LUT + // in the final stage. + color = pow(color, vec3(1.0/2.2)); +#endif +#ifdef USE_GAMMA_POW + color = pow(color, inv_gamma); +#endif +#ifdef USE_3DLUT + color = texture(lut_3d, color).rgb; +#endif +#ifdef USE_DITHER + float dither = texture(dither, gl_FragCoord.xy / textureSize(dither, 0)).r; + color = floor(color * dither_multiply + dither ) / dither_quantization; +#endif + out_color = vec4(color, 1); +} |