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_vertex()
 123 {
 124         return R"shader(
 125                         void main()
 126                         {
 127                                 gl_TexCoord[0] = gl_MultiTexCoord0;
 128                         //      gl_TexCoord[1] = gl_MultiTexCoord1;
 129                                 vec4 pos = ftransform();
 130                                 gl_TexCoord[1] = vec4(pos.xy, 0.0, 0.0);
 131                                 pos.x = pos.x*2.0 - 1.0;
 132                                 pos.y = pos.y*2.0 - 1.0;
 133                                 gl_Position    = pos;
 134                         }
 135         )shader";
 136 }
 137
 138 std::string get_fragment(bool blend_modes)
 139 {
 140         return R"shader(
 141
 142                         #version 130
 143                         uniform sampler2D       background;
 144                         uniform sampler2D       plane[4];
 145                         uniform vec2            plane_size[4];
 146                         uniform sampler2D       local_key;
 147                         uniform sampler2D       layer_key;
 148
 149                         uniform bool            is_hd;
 150                         uniform bool            has_local_key;
 151                         uniform bool            has_layer_key;
 152                         uniform int                     blend_mode;
 153                         uniform int                     keyer;
 154                         uniform int                     pixel_format;
 155                         uniform int                     deinterlace;
 156
 157                         uniform float           opacity;
 158                         uniform bool            levels;
 159                         uniform float           min_input;
 160                         uniform float           max_input;
 161                         uniform float           gamma;
 162                         uniform float           min_output;
 163                         uniform float           max_output;
 164
 165                         uniform bool            csb;
 166                         uniform float           brt;
 167                         uniform float           sat;
 168                         uniform float           con;
 169
 170         )shader"
 171
 172         +
 173
 174         (blend_modes ? get_blend_color_func() : get_simple_blend_color_func())
 175
 176         +
 177
 178         R"shader(
 179
 180                         vec4 ycbcra_to_rgba_sd(float Y, float Cb, float Cr, float A)
 181                         {
 182                                 vec4 rgba;
 183                                 rgba.b = (1.164*(Y*255 - 16) + 1.596*(Cr*255 - 128))/255;
 184                                 rgba.g = (1.164*(Y*255 - 16) - 0.813*(Cr*255 - 128) - 0.391*(Cb*255 - 128))/255;
 185                                 rgba.r = (1.164*(Y*255 - 16) + 2.018*(Cb*255 - 128))/255;
 186                                 rgba.a = A;
 187                                 return rgba;
 188                         }
 189
 190                         vec4 ycbcra_to_rgba_hd(float Y, float Cb, float Cr, float A)
 191                         {
 192                                 vec4 rgba;
 193                                 rgba.b = (1.164*(Y*255 - 16) + 1.793*(Cr*255 - 128))/255;
 194                                 rgba.g = (1.164*(Y*255 - 16) - 0.534*(Cr*255 - 128) - 0.213*(Cb*255 - 128))/255;
 195                                 rgba.r = (1.164*(Y*255 - 16) + 2.115*(Cb*255 - 128))/255;
 196                                 rgba.a = A;
 197                                 return rgba;
 198                         }
 199
 200                         vec4 ycbcra_to_rgba(float y, float cb, float cr, float a)
 201                         {
 202                                 if(is_hd)
 203                                         return ycbcra_to_rgba_hd(y, cb, cr, a);
 204                                 else
 205                                         return ycbcra_to_rgba_sd(y, cb, cr, a);
 206                         }
 207
 208                         vec4 get_sample(sampler2D sampler, vec2 coords, vec2 size)
 209                         {
 210                                 switch(deinterlace)
 211                                 {
 212                                 case 1: // upper
 213                                         return texture2D(sampler, coords);
 214                                 case 2: // lower
 215                                         return texture2D(sampler, coords);
 216                                 default:
 217                                         return texture2D(sampler, coords);
 218                                 }
 219                         }
 220
 221                         vec4 get_rgba_color()
 222                         {
 223                                 switch(pixel_format)
 224                                 {
 225                                 case 0:         //gray
 226                                         return vec4(get_sample(plane[0], gl_TexCoord[0].st, plane_size[0]).rrr, 1.0);
 227                                 case 1:         //bgra,
 228                                         return get_sample(plane[0], gl_TexCoord[0].st, plane_size[0]).bgra;
 229                                 case 2:         //rgba,
 230                                         return get_sample(plane[0], gl_TexCoord[0].st, plane_size[0]).rgba;
 231                                 case 3:         //argb,
 232                                         return get_sample(plane[0], gl_TexCoord[0].st, plane_size[0]).argb;
 233                                 case 4:         //abgr,
 234                                         return get_sample(plane[0], gl_TexCoord[0].st, plane_size[0]).gbar;
 235                                 case 5:         //ycbcr,
 236                                         {
 237                                                 float y  = get_sample(plane[0], gl_TexCoord[0].st, plane_size[0]).r;
 238                                                 float cb = get_sample(plane[1], gl_TexCoord[0].st, plane_size[0]).r;
 239                                                 float cr = get_sample(plane[2], gl_TexCoord[0].st, plane_size[0]).r;
 240                                                 return ycbcra_to_rgba(y, cb, cr, 1.0);
 241                                         }
 242                                 case 6:         //ycbcra
 243                                         {
 244                                                 float y  = get_sample(plane[0], gl_TexCoord[0].st, plane_size[0]).r;
 245                                                 float cb = get_sample(plane[1], gl_TexCoord[0].st, plane_size[0]).r;
 246                                                 float cr = get_sample(plane[2], gl_TexCoord[0].st, plane_size[0]).r;
 247                                                 float a  = get_sample(plane[3], gl_TexCoord[0].st, plane_size[0]).r;
 248                                                 return ycbcra_to_rgba(y, cb, cr, a);
 249                                         }
 250                                 case 7:         //luma
 251                                         {
 252                                                 vec3 y3 = get_sample(plane[0], gl_TexCoord[0].st, plane_size[0]).rrr;
 253                                                 return vec4((y3-0.065)/0.859, 1.0);
 254                                         }
 255                                 case 8:         //bgr,
 256                                         return vec4(get_sample(plane[0], gl_TexCoord[0].st, plane_size[0]).bgr, 1.0);
 257                                 case 9:         //rgb,
 258                                         return vec4(get_sample(plane[0], gl_TexCoord[0].st, plane_size[0]).rgb, 1.0);
 259                                 }
 260                                 return vec4(0.0, 0.0, 0.0, 0.0);
 261                         }
 262
 263                         void main()
 264                         {
 265                                 vec4 color = get_rgba_color();
 266                            if(levels)
 267                                         color.rgb = LevelsControl(color.rgb, min_input, gamma, max_input, min_output, max_output);
 268                                 if(csb)
 269                                         color.rgb = ContrastSaturationBrightness(color.rgb, brt, sat, con);
 270                                 if(has_local_key)
 271                                         color *= texture2D(local_key, gl_TexCoord[1].st).r;
 272                                 if(has_layer_key)
 273                                         color *= texture2D(layer_key, gl_TexCoord[1].st).r;
 274                                 color *= opacity;
 275                                 color = blend(color);
 276                                 gl_FragColor = color.bgra;
 277                         }
 278         )shader";
 279 }
 280
 281 std::shared_ptr<shader> get_image_shader(
 282                 const spl::shared_ptr<device>& ogl, bool& blend_modes, bool blend_modes_wanted)
 283 {
 284         tbb::mutex::scoped_lock lock(g_shader_mutex);
 285         auto existing_shader = g_shader.lock();
 286
 287         if(existing_shader)
 288         {
 289                 blend_modes = g_blend_modes;
 290                 return existing_shader;
 291         }
 292
 293         // The deleter is alive until the weak pointer is destroyed, so we have
 294         // to weakly reference ogl, to not keep it alive until atexit
 295         std::weak_ptr<device> weak_ogl = ogl;
 296
 297         auto deleter = [weak_ogl](shader* p)
 298         {
 299                 auto ogl = weak_ogl.lock();
 300
 301                 if (ogl)
 302                         ogl->invoke([=]
 303                         {
 304                                 delete p;
 305                         });
 306         };
 307
 308         try
 309         {
 310                 g_blend_modes  = glTextureBarrierNV ? blend_modes_wanted : false;
 311                 existing_shader.reset(new shader(get_vertex(), get_fragment(g_blend_modes)), deleter);
 312         }
 313         catch(...)
 314         {
 315                 CASPAR_LOG_CURRENT_EXCEPTION();
 316                 CASPAR_LOG(warning) << "Failed to compile shader. Trying to compile without blend-modes.";
 317
 318                 g_blend_modes = false;
 319                 existing_shader.reset(new shader(get_vertex(), get_fragment(g_blend_modes)), deleter);
 320         }
 321
 322         //if(!g_blend_modes)
 323         //{
 324         //      ogl.blend_func(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE);
 325         //      CASPAR_LOG(info) << L"[shader] Blend-modes are disabled.";
 326         //}
 327
 328
 329         blend_modes = g_blend_modes;
 330         g_shader = existing_shader;
 331         return existing_shader;
 332 }
 333
 334 }}}