cinelerra-5.1/plugins/colorbalance/aggregated.h

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program 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 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program 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 this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #ifndef COLORBALANCE_AGGREGATED
  23 #define COLORBALANCE_AGGREGATED
  24
  25 static const char *colorbalance_get_pixel1 =
  26         "vec4 colorbalance_get_pixel()\n"
  27         "{\n"
  28         "       return gl_FragColor;\n"
  29         "}\n";
  30
  31 static const char *colorbalance_get_pixel2 =
  32         "uniform sampler2D tex;\n"
  33         "vec4 colorbalance_get_pixel()\n"
  34         "{\n"
  35         "       return texture2D(tex, gl_TexCoord[0].st);\n"
  36         "}\n";
  37
  38
  39 static const char *colorbalance_rgb_shader =
  40         "uniform vec3 colorbalance_scale;\n"
  41         "void main()\n"
  42         "{\n"
  43         "       gl_FragColor = colorbalance_get_pixel();\n"
  44         "       gl_FragColor.rgb *= colorbalance_scale;\n"
  45         "}\n";
  46
  47 static const char *colorbalance_yuv_shader =
  48         "uniform vec3 colorbalance_scale;\n"
  49         "void main()\n"
  50         "{\n"
  51         "       gl_FragColor = colorbalance_get_pixel();\n"
  52                 YUV_TO_RGB_FRAG("gl_FragColor")
  53         "       gl_FragColor.rgb *= colorbalance_scale;\n"
  54                 RGB_TO_YUV_FRAG("gl_FragColor")
  55         "}\n";
  56
  57 static const char *colorbalance_yuv_preserve_shader =
  58         "uniform vec3 colorbalance_scale;\n"
  59         "void main()\n"
  60         "{\n"
  61         "       gl_FragColor = colorbalance_get_pixel();\n"
  62         "       float y = gl_FragColor.r;\n"
  63                 YUV_TO_RGB_FRAG("gl_FragColor")
  64         "       gl_FragColor.rgb *= colorbalance_scale.rgb;\n"
  65                 RGB_TO_YUV_FRAG("gl_FragColor")
  66         "       gl_FragColor.r = y;\n"
  67         "}\n";
  68
  69 #define COLORBALANCE_COMPILE(shader_stack, current_shader, aggregate_prev) do { \
  70         shader_stack[current_shader++] = \
  71                 aggregate_prev ? colorbalance_get_pixel1 : colorbalance_get_pixel2; \
  72         shader_stack[current_shader++] = \
  73                 !BC_CModels::is_yuv(get_output()->get_color_model()) ? colorbalance_rgb_shader : \
  74                         get_output()->get_params()->get("COLORBALANCE_PRESERVE", (int)0) ? \
  75                         colorbalance_yuv_preserve_shader : colorbalance_yuv_shader ; \
  76 } while(0)
  77
  78 #define COLORBALANCE_UNIFORMS(shader) do { \
  79         glUniform3f(glGetUniformLocation(shader, "colorbalance_scale"),  \
  80                 get_output()->get_params()->get("COLORBALANCE_CYAN", (float)1), \
  81                 get_output()->get_params()->get("COLORBALANCE_MAGENTA", (float)1), \
  82                 get_output()->get_params()->get("COLORBALANCE_YELLOW", (float)1)); \
  83 } while(0)
  84
  85 #endif
  86