cinelerra-5.1/plugins/dissolve/dissolve.C

   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 #include "dissolve.h"
  23 #include "edl.inc"
  24 #include "language.h"
  25 #include "overlayframe.h"
  26 #include "vframe.h"
  27
  28 #include <string.h>
  29
  30 PluginClient* new_plugin(PluginServer *server)
  31 {
  32         return new DissolveMain(server);
  33 }
  34
  35
  36
  37
  38
  39 DissolveMain::DissolveMain(PluginServer *server)
  40  : PluginVClient(server)
  41 {
  42         overlayer = 0;
  43 }
  44
  45 DissolveMain::~DissolveMain()
  46 {
  47         delete overlayer;
  48 }
  49
  50 const char* DissolveMain::plugin_title() { return _("Dissolve"); }
  51 int DissolveMain::is_video() { return 1; }
  52 int DissolveMain::is_transition() { return 1; }
  53 int DissolveMain::uses_gui() { return 0; }
  54
  55
  56
  57 int DissolveMain::process_realtime(VFrame *incoming, VFrame *outgoing)
  58 {
  59         fade = (float)PluginClient::get_source_position() /
  60                         PluginClient::get_total_len();
  61
  62 // Use hardware
  63         if(get_use_opengl())
  64         {
  65                 run_opengl();
  66                 return 0;
  67         }
  68
  69 // Use software
  70         if(!overlayer) overlayer = new OverlayFrame(get_project_smp() + 1);
  71
  72         overlayer->overlay(outgoing, incoming,
  73                 0, 0, incoming->get_w(), incoming->get_h(),
  74                 0, 0, incoming->get_w(), incoming->get_h(),
  75                 fade, TRANSFER_SRC, NEAREST_NEIGHBOR);
  76
  77         return 0;
  78 }
  79
  80 int DissolveMain::handle_opengl()
  81 {
  82 #ifdef HAVE_GL
  83         static const char *blend_dissolve =
  84                 "uniform float fade;\n"
  85                 "uniform sampler2D src_tex;\n"
  86                 "uniform sampler2D dst_tex;\n"
  87                 "uniform vec2 dst_tex_dimensions;\n"
  88                 "uniform vec3 chroma_offset;\n"
  89                 "void main()\n"
  90                 "{\n"
  91                 "       vec4 result_color;\n"
  92                 "       vec4 dst_color = texture2D(dst_tex, gl_FragCoord.xy / dst_tex_dimensions);\n"
  93                 "       vec4 src_color = texture2D(src_tex, gl_TexCoord[0].st);\n"
  94                 "       src_color.rgb -= chroma_offset;\n"
  95                 "       dst_color.rgb -= chroma_offset;\n"
  96                 "       result_color = mix(dst_color, src_color, fade);\n"
  97                 "       result_color.rgb += chroma_offset;\n"
  98                 "       gl_FragColor = result_color;\n"
  99                 "}\n";
 100
 101 // Read images from RAM
 102         VFrame *src = get_input();
 103         src->to_texture();
 104         VFrame *dst = get_output();
 105         dst->to_texture();
 106         dst->enable_opengl();
 107         dst->init_screen();
 108         src->bind_texture(0);
 109         dst->bind_texture(1);
 110
 111         const char *shader_stack[] = { 0, 0, 0 };
 112         int current_shader = 0;
 113         shader_stack[current_shader++] = blend_dissolve;
 114
 115         unsigned int shader_id = VFrame::make_shader(0,
 116                 shader_stack[0], shader_stack[1], shader_stack[2], 0);
 117
 118         glUseProgram(shader_id);
 119         glUniform1f(glGetUniformLocation(shader_id, "fade"), fade);
 120         glUniform1i(glGetUniformLocation(shader_id, "src_tex"), 0);
 121         glUniform1i(glGetUniformLocation(shader_id, "dst_tex"), 1);
 122         if(BC_CModels::is_yuv(dst->get_color_model()))
 123                 glUniform3f(glGetUniformLocation(shader_id, "chroma_offset"), 0.0, 0.5, 0.5);
 124         else
 125                 glUniform3f(glGetUniformLocation(shader_id, "chroma_offset"), 0.0, 0.0, 0.0);
 126         glUniform2f(glGetUniformLocation(shader_id, "dst_tex_dimensions"),
 127                 (float)dst->get_texture_w(),
 128                 (float)dst->get_texture_h());
 129
 130         glDisable(GL_BLEND);
 131         src->draw_texture();
 132         glUseProgram(0);
 133
 134         glDisable(GL_BLEND);
 135         glActiveTexture(GL_TEXTURE1);
 136         glDisable(GL_TEXTURE_2D);
 137         glActiveTexture(GL_TEXTURE0);
 138         glDisable(GL_TEXTURE_2D);
 139
 140         dst->set_opengl_state(VFrame::SCREEN);
 141 #endif
 142         return 0;
 143 }
 144
 145
 146