GLvideo_tradtex.cpp

   1 #include "GLvideo_tradtex.h"
   2 #include "videoData.h"
   3
   4 //needed for NULL
   5 #include <stdio.h>
   6
   7 namespace GLVideoRenderer
   8 {
   9 #define BUFFER_OFFSET(i) ((char *)NULL + (i))
  10
  11 TradTex::TradTex()
  12 {
  13         textures.y = 0;
  14         textures.u = 0;
  15         textures.v = 0;
  16 }
  17
  18 TradTex::~TradTex()
  19 {
  20         deleteTextures();
  21 }
  22
  23 void TradTex::deleteTextures()
  24 {
  25         if(glIsTexture(textures.y)) glDeleteTextures(1, &(textures.y));
  26         if(glIsTexture(textures.u)) glDeleteTextures(1, &(textures.u));
  27         if(glIsTexture(textures.v)) glDeleteTextures(1, &(textures.v));
  28 }
  29
  30 void TradTex::createTextures(VideoData *video_data)
  31 {
  32         deleteTextures();
  33         glGenTextures(3, (GLuint *)&textures);
  34
  35         if (video_data->isPlanar) {
  36                 glBindTexture(GL_TEXTURE_RECTANGLE_ARB, textures.u);
  37                 glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, video_data->glInternalFormat,
  38                              video_data->Cwidth, video_data->Cheight, 0,
  39                              video_data->glFormat, video_data->glType, NULL);
  40                 glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER,
  41                                 video_data->glMinMaxFilter);
  42                 glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,
  43                                 video_data->glMinMaxFilter);
  44
  45                 glBindTexture(GL_TEXTURE_RECTANGLE_ARB, textures.v);
  46                 glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, video_data->glInternalFormat,
  47                              video_data->Cwidth, video_data->Cheight, 0,
  48                              video_data->glFormat, video_data->glType, NULL);
  49                 glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER,
  50                                 video_data->glMinMaxFilter);
  51                 glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,
  52                                 video_data->glMinMaxFilter);
  53
  54                 glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
  55         }
  56
  57         glBindTexture(GL_TEXTURE_RECTANGLE_ARB, textures.y);
  58         glTexImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, video_data->glInternalFormat,
  59                      video_data->glYTextureWidth, video_data->Yheight, 0,
  60                      video_data->glFormat, video_data->glType, NULL);
  61         glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MAG_FILTER,
  62                         video_data->glMinMaxFilter);
  63         glTexParameteri(GL_TEXTURE_RECTANGLE_ARB, GL_TEXTURE_MIN_FILTER,
  64                         video_data->glMinMaxFilter);
  65
  66         glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
  67 }
  68
  69 void TradTex::uploadTextures(VideoData *video_data)
  70 {
  71         if (video_data->isPlanar) {
  72                 glBindTexture(GL_TEXTURE_RECTANGLE_ARB, textures.u);
  73                 glTexSubImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0, video_data->Cwidth,
  74                                 video_data->Cheight, video_data->glFormat,
  75                                 video_data->glType, video_data->Udata);
  76                 glBindTexture(GL_TEXTURE_RECTANGLE_ARB, textures.v);
  77                 glTexSubImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0, video_data->Cwidth,
  78                                 video_data->Cheight, video_data->glFormat,
  79                                 video_data->glType, video_data->Vdata);
  80                 glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
  81         }
  82         glBindTexture(GL_TEXTURE_RECTANGLE_ARB, textures.y);
  83         glTexSubImage2D(GL_TEXTURE_RECTANGLE_ARB, 0, 0, 0,
  84                         video_data->glYTextureWidth, video_data->Yheight,
  85                         video_data->glFormat, video_data->glType, video_data->Ydata);
  86         glBindTexture(GL_TEXTURE_RECTANGLE_ARB, 0);
  87 }
  88
  89 void TradTex::renderVideo(VideoData *video_data, GLuint shader_prog)
  90 {
  91         glClear(GL_COLOR_BUFFER_BIT);
  92
  93         glUseProgramObjectARB(shader_prog);
  94         int i;
  95         if (video_data->isPlanar) {
  96                 glActiveTexture(GL_TEXTURE1);
  97                 glBindTexture(GL_TEXTURE_RECTANGLE_ARB, textures.u);
  98                 i = glGetUniformLocationARB(shader_prog, "Utex");
  99                 glUniform1iARB(i, 1); /* Bind Ytex to texture unit 1 */
 100
 101                 glActiveTexture(GL_TEXTURE2);
 102                 glBindTexture(GL_TEXTURE_RECTANGLE_ARB, textures.v);
 103                 i = glGetUniformLocationARB(shader_prog, "Vtex");
 104                 glUniform1iARB(i, 2); /* Bind Ytex to texture unit 2 */
 105         }
 106
 107         glActiveTexture(GL_TEXTURE0);
 108         glBindTexture(GL_TEXTURE_RECTANGLE_ARB, textures.y);
 109         i = glGetUniformLocationARB(shader_prog, "Ytex");
 110         glUniform1iARB(i, 0); /* Bind Ytex to texture unit 0 */
 111
 112         /* NB, texture coordinates are relative to the texture data, (0,0)
 113          * is the first texture pixel uploaded, since we use two different
 114          * coordinate systems, the texture appears to be upside down */
 115         glBegin(GL_QUADS);
 116         glTexCoord2i(0, video_data->Yheight);
 117         glColor3f(1., 0., 0.);
 118         glVertex2i(0, 0);
 119         glTexCoord2i(video_data->glYTextureWidth, video_data->Yheight);
 120         glColor3f(0., 1., 0.);
 121         glVertex2i(video_data->Ywidth, 0);
 122         glTexCoord2i(video_data->glYTextureWidth, 0);
 123         glColor3f(0., 0., 1.);
 124         glVertex2i(video_data->Ywidth, video_data->Yheight);
 125         glTexCoord2i(0, 0);
 126         glColor3f(0., 0., 0.);
 127         glVertex2i(0, video_data->Yheight);
 128         glEnd();
 129         glUseProgramObjectARB(0);
 130 }
 131 } // namespace