git.sesse.net Git - casparcg/blob - accelerator/ogl/image/image_shader.cpp

   1 /*
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
   3 *
   4 * This file is part of CasparCG (www.casparcg.com).
   5 *
   6 * CasparCG is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, either version 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * CasparCG is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
  18 *
  19 * Author: Robert Nagy, ronag89@gmail.com
  20 */
  21
  22 #include "../../StdAfx.h"
  23
  24 #include "image_shader.h"
  25
  26 #include "../util/shader.h"
  27 #include "../util/device.h"
  28
  29 #include "blending_glsl.h"
  30
  31 #include <common/gl/gl_check.h>
  32 #include <common/env.h>
  33
  34 #include <tbb/mutex.h>
  35
  36 namespace caspar { namespace accelerator { namespace ogl {
  37
  38 std::weak_ptr<shader>   g_shader;
  39 tbb::mutex                              g_shader_mutex;
  40 bool                                    g_blend_modes = false;
  41
  42 std::string get_blend_color_func()
  43 {
  44         return
  45
  46                 get_adjustement_glsl()
  47
  48                 +
  49
  50                 get_blend_glsl()
  51
  52                 +
  53
  54                 R"shader(
  55                                 vec3 get_blend_color(vec3 back, vec3 fore)
  56                                 {
  57                                         switch(blend_mode)
  58                                         {
  59                                         case  0: return BlendNormal(back, fore);
  60                                         case  1: return BlendLighten(back, fore);
  61                                         case  2: return BlendDarken(back, fore);
  62                                         case  3: return BlendMultiply(back, fore);
  63                                         case  4: return BlendAverage(back, fore);
  64                                         case  5: return BlendAdd(back, fore);
  65                                         case  6: return BlendSubstract(back, fore);
  66                                         case  7: return BlendDifference(back, fore);
  67                                         case  8: return BlendNegation(back, fore);
  68                                         case  9: return BlendExclusion(back, fore);
  69                                         case 10: return BlendScreen(back, fore);
  70                                         case 11: return BlendOverlay(back, fore);
  71                                 //      case 12: return BlendSoftLight(back, fore);
  72                                         case 13: return BlendHardLight(back, fore);
  73                                         case 14: return BlendColorDodge(back, fore);
  74                                         case 15: return BlendColorBurn(back, fore);
  75                                         case 16: return BlendLinearDodge(back, fore);
  76                                         case 17: return BlendLinearBurn(back, fore);
  77                                         case 18: return BlendLinearLight(back, fore);
  78                                         case 19: return BlendVividLight(back, fore);
  79                                         case 20: return BlendPinLight(back, fore);
  80                                         case 21: return BlendHardMix(back, fore);
  81                                         case 22: return BlendReflect(back, fore);
  82                                         case 23: return BlendGlow(back, fore);
  83                                         case 24: return BlendPhoenix(back, fore);
  84                                         case 25: return BlendHue(back, fore);
  85                                         case 26: return BlendSaturation(back, fore);
  86                                         case 27: return BlendColor(back, fore);
  87                                         case 28: return BlendLuminosity(back, fore);
  88                                         }
  89                                         return BlendNormal(back, fore);
  90                                 }
  91
  92                                 vec4 blend(vec4 fore)
  93                                 {
  94                                    vec4 back = texture2D(background, gl_TexCoord[1].st).bgra;
  95                                    if(blend_mode != 0)
  96                                                 fore.rgb = get_blend_color(back.rgb/(back.a+0.0000001), fore.rgb/(fore.a+0.0000001))*fore.a;
  97                                         switch(keyer)
  98                                         {
  99                                                 case 1:  return fore + back; // additive
 100                                                 default: return fore + (1.0-fore.a)*back; // linear
 101                                         }
 102                                 }
 103                 )shader";
 104 }
 105
 106 std::string get_simple_blend_color_func()
 107 {
 108         return
 109
 110                 get_adjustement_glsl()
 111
 112                 +
 113
 114                 R"shader(
 115                                 vec4 blend(vec4 fore)
 116                                 {
 117                                         return fore;
 118                                 }
 119                 )shader";
 120 }
 121
 122 std::string get_chroma_func()
 123 {
 124         return
 125
 126                 get_chroma_glsl()
 127
 128                 +
 129
 130                 R"shader(
 131                                 vec4 chroma_key(vec4 c)
 132                                 {
 133                                         switch (chroma_mode)
 134                                         {
 135                                         case 0: return c;
 136                                         case 1: return ChromaOnGreen(c.bgra).bgra;
 137                                         case 2: return ChromaOnBlue(c.bgra).bgra;
 138                                         }
 139
 140                                         return c;
 141                                 }
 142                 )shader";
 143 }
 144
 145 std::string get_vertex()
 146 {
 147         return R"shader(
 148                         void main()
 149                         {
 150                                 gl_TexCoord[0] = gl_MultiTexCoord0;
 151                         //      gl_TexCoord[1] = gl_MultiTexCoord1;
 152                                 vec4 pos = ftransform();
 153                                 gl_TexCoord[1] = vec4(pos.xy, 0.0, 0.0);
 154                                 pos.x = pos.x*2.0 - 1.0;
 155                                 pos.y = pos.y*2.0 - 1.0;
 156                                 gl_Position    = pos;
 157                         }
 158         )shader";
 159 }
 160
 161 std::string get_fragment(bool blend_modes)
 162 {
 163         return R"shader(
 164
 165                         #version 130
 166                         uniform sampler2D       background;
 167                         uniform sampler2D       plane[4];
 168                         uniform vec2            plane_size[4];
 169                         uniform sampler2D       local_key;
 170                         uniform sampler2D       layer_key;
 171
 172                         uniform bool            is_hd;
 173                         uniform bool            has_local_key;
 174                         uniform bool            has_layer_key;
 175                         uniform int                     blend_mode;
 176                         uniform int                     keyer;
 177                         uniform int                     pixel_format;
 178                         uniform int                     deinterlace;
 179
 180                         uniform float           opacity;
 181                         uniform bool            levels;
 182                         uniform float           min_input;
 183                         uniform float           max_input;
 184                         uniform float           gamma;
 185                         uniform float           min_output;
 186                         uniform float           max_output;
 187
 188                         uniform bool            csb;
 189                         uniform float           brt;
 190                         uniform float           sat;
 191                         uniform float           con;
 192
 193                         uniform bool            chroma;
 194                         uniform int                     chroma_mode;
 195                         uniform vec2            chroma_blend;
 196                         uniform float           chroma_spill;
 197         )shader"
 198
 199         +
 200
 201         (blend_modes ? get_blend_color_func() : get_simple_blend_color_func())
 202
 203         +
 204
 205         get_chroma_func()
 206
 207         +
 208
 209         R"shader(
 210
 211                         vec4 ycbcra_to_rgba_sd(float Y, float Cb, float Cr, float A)
 212                         {
 213                                 vec4 rgba;
 214                                 rgba.b = (1.164*(Y*255 - 16) + 1.596*(Cr*255 - 128))/255;
 215                                 rgba.g = (1.164*(Y*255 - 16) - 0.813*(Cr*255 - 128) - 0.391*(Cb*255 - 128))/255;
 216                                 rgba.r = (1.164*(Y*255 - 16) + 2.018*(Cb*255 - 128))/255;
 217                                 rgba.a = A;
 218                                 return rgba;
 219                         }
 220
 221                         vec4 ycbcra_to_rgba_hd(float Y, float Cb, float Cr, float A)
 222                         {
 223                                 vec4 rgba;
 224                                 rgba.b = (1.164*(Y*255 - 16) + 1.793*(Cr*255 - 128))/255;
 225                                 rgba.g = (1.164*(Y*255 - 16) - 0.534*(Cr*255 - 128) - 0.213*(Cb*255 - 128))/255;
 226                                 rgba.r = (1.164*(Y*255 - 16) + 2.115*(Cb*255 - 128))/255;
 227                                 rgba.a = A;
 228                                 return rgba;
 229                         }
 230
 231                         vec4 ycbcra_to_rgba(float y, float cb, float cr, float a)
 232                         {
 233                                 if(is_hd)
 234                                         return ycbcra_to_rgba_hd(y, cb, cr, a);
 235                                 else
 236                                         return ycbcra_to_rgba_sd(y, cb, cr, a);
 237                         }
 238
 239                         vec4 get_sample(sampler2D sampler, vec2 coords, vec2 size)
 240                         {
 241                                 switch(deinterlace)
 242                                 {
 243                                 case 1: // upper
 244                                         return texture2D(sampler, coords);
 245                                 case 2: // lower
 246                                         return texture2D(sampler, coords);
 247                                 default:
 248                                         return texture2D(sampler, coords);
 249                                 }
 250                         }
 251
 252                         vec4 get_rgba_color()
 253                         {
 254                                 switch(pixel_format)
 255                                 {
 256                                 case 0:         //gray
 257                                         return vec4(get_sample(plane[0], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).rrr, 1.0);
 258                                 case 1:         //bgra,
 259                                         return get_sample(plane[0], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).bgra;
 260                                 case 2:         //rgba,
 261                                         return get_sample(plane[0], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).rgba;
 262                                 case 3:         //argb,
 263                                         return get_sample(plane[0], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).argb;
 264                                 case 4:         //abgr,
 265                                         return get_sample(plane[0], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).gbar;
 266                                 case 5:         //ycbcr,
 267                                         {
 268                                                 float y  = get_sample(plane[0], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).r;
 269                                                 float cb = get_sample(plane[1], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).r;
 270                                                 float cr = get_sample(plane[2], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).r;
 271                                                 return ycbcra_to_rgba(y, cb, cr, 1.0);
 272                                         }
 273                                 case 6:         //ycbcra
 274                                         {
 275                                                 float y  = get_sample(plane[0], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).r;
 276                                                 float cb = get_sample(plane[1], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).r;
 277                                                 float cr = get_sample(plane[2], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).r;
 278                                                 float a  = get_sample(plane[3], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).r;
 279                                                 return ycbcra_to_rgba(y, cb, cr, a);
 280                                         }
 281                                 case 7:         //luma
 282                                         {
 283                                                 vec3 y3 = get_sample(plane[0], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).rrr;
 284                                                 return vec4((y3-0.065)/0.859, 1.0);
 285                                         }
 286                                 case 8:         //bgr,
 287                                         return vec4(get_sample(plane[0], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).bgr, 1.0);
 288                                 case 9:         //rgb,
 289                                         return vec4(get_sample(plane[0], gl_TexCoord[0].st / gl_TexCoord[0].q, plane_size[0]).rgb, 1.0);
 290                                 }
 291                                 return vec4(0.0, 0.0, 0.0, 0.0);
 292                         }
 293
 294                         void main()
 295                         {
 296                                 vec4 color = get_rgba_color();
 297                                 if (chroma)
 298                                         color = chroma_key(color);
 299                                 if(levels)
 300                                         color.rgb = LevelsControl(color.rgb, min_input, gamma, max_input, min_output, max_output);
 301                                 if(csb)
 302                                         color.rgb = ContrastSaturationBrightness(color.rgb, brt, sat, con);
 303                                 if(has_local_key)
 304                                         color *= texture2D(local_key, gl_TexCoord[1].st).r;
 305                                 if(has_layer_key)
 306                                         color *= texture2D(layer_key, gl_TexCoord[1].st).r;
 307                                 color *= opacity;
 308                                 color = blend(color);
 309                                 gl_FragColor = color.bgra;
 310                         }
 311         )shader";
 312 }
 313
 314 std::shared_ptr<shader> get_image_shader(
 315                 const spl::shared_ptr<device>& ogl, bool& blend_modes, bool blend_modes_wanted)
 316 {
 317         tbb::mutex::scoped_lock lock(g_shader_mutex);
 318         auto existing_shader = g_shader.lock();
 319
 320         if(existing_shader)
 321         {
 322                 blend_modes = g_blend_modes;
 323                 return existing_shader;
 324         }
 325
 326         // The deleter is alive until the weak pointer is destroyed, so we have
 327         // to weakly reference ogl, to not keep it alive until atexit
 328         std::weak_ptr<device> weak_ogl = ogl;
 329
 330         auto deleter = [weak_ogl](shader* p)
 331         {
 332                 auto ogl = weak_ogl.lock();
 333
 334                 if (ogl)
 335                         ogl->invoke([=]
 336                         {
 337                                 delete p;
 338                         });
 339         };
 340
 341         try
 342         {
 343                 g_blend_modes  = glTextureBarrierNV ? blend_modes_wanted : false;
 344                 existing_shader.reset(new shader(get_vertex(), get_fragment(g_blend_modes)), deleter);
 345         }
 346         catch(...)
 347         {
 348                 CASPAR_LOG_CURRENT_EXCEPTION();
 349                 CASPAR_LOG(warning) << "Failed to compile shader. Trying to compile without blend-modes.";
 350
 351                 g_blend_modes = false;
 352                 existing_shader.reset(new shader(get_vertex(), get_fragment(g_blend_modes)), deleter);
 353         }
 354
 355         //if(!g_blend_modes)
 356         //{
 357         //      ogl.blend_func(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE);
 358         //      CASPAR_LOG(info) << L"[shader] Blend-modes are disabled.";
 359         //}
 360
 361
 362         blend_modes = g_blend_modes;
 363         g_shader = existing_shader;
 364         return existing_shader;
 365 }
 366
 367 }}}