Attachment 105688 Details for Bug 83442 – Glut sample code

Glut sample code

glutsample.cpp (text/plain), 2.44 KB, created by Mark Newiger on 2014-09-03 14:57:44 UTC

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Creator: Mark Newiger

Created: 2014-09-03 14:57:44 UTC

Size: 2.44 KB

patch

obsolete

>#include <GL/glut.h>
>#include <stdlib.h>
>#include <string>
>#include <sstream>
>
>#include <boost/chrono/chrono.hpp>
>
>GLuint g_texId = 0;
>
>void render(void);
>void createEnvironment(void);
>void resize(int,int);
>void handleIdle(void);
>
>int main(int argc,char **argv)
>{
>  glutInit(&argc, argv);
>  glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
>  glutCreateWindow("SeeFront Demo");
>  glutReshapeWindow(1920,1080);
>  glutDisplayFunc(render);
>  glutReshapeFunc(resize);
>  glutIdleFunc(handleIdle);
>  createEnvironment();
>   
>  glutMainLoop();
>  
>  return(0);
>}
>
>/*
> * Initialize OpenGL and SeeFront
> */
>void createEnvironment(void)
>{
>  // OpenGL init
>  glEnable(GL_DEPTH_TEST);
>  glDisable(GL_LINE_SMOOTH);
>  glDisable(GL_POINT_SMOOTH); 
>  glDisable(GL_DITHER);
>  glDisable(GL_CULL_FACE);
>  
>  glBindTexture(GL_TEXTURE_2D, g_texId);
>  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,  1920,  1080, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
>  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);	
>  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
>  glBindTexture(GL_TEXTURE_2D, 0);
>}
>
>/*
> * The render method.
> * Here the scene is rendered two times. One for the left eye and one for the right eye.
> * The rendered scene is copied into the textures and passed to the SeeFront object.
> */
>void render(void)
>{
>  glClearColor(255, 0, 0, 255);
>  glClear(GL_COLOR_BUFFER_BIT);
>  
>  unsigned char* buffer = new unsigned char[1920*1080*4];
>  int mem;
>  glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, &mem);
>  boost::chrono::steady_clock::time_point tpStart = boost::chrono::steady_clock::now();
>  glBindTexture(GL_TEXTURE_2D, g_texId);
>  glTexSubImage2D(  GL_TEXTURE_2D, 0, 0, 0, 
>                    1920, 
>                    1080, 
>					GL_RGBA,
>                    GL_UNSIGNED_BYTE,
>                    buffer);
>  glBindTexture(GL_TEXTURE_2D, 0);
>  glReadPixels(0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, &mem);
>  boost::chrono::steady_clock::time_point tpEnd = boost::chrono::steady_clock::now();
>  boost::chrono::milliseconds dur = boost::chrono::duration_cast<boost::chrono::milliseconds>(tpEnd - tpStart);
>  int msec = static_cast<int>(dur.count());    
>  std::stringstream numberString;
>  numberString << msec;  
>  std::cout << numberString.str() << std::endl;
>  delete buffer;
>    
>  glutSwapBuffers();
>}
>
>
>void handleIdle(void)
>{
>  glutPostRedisplay();
>}
>
>
>void resize(int w,int h)
>{
>  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
>  glViewport(0,0,(GLsizei)w,(GLsizei)h);
>}
>
>

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Attachments on bug 83442: 105688 | 105689 | 105690 | 105691 | 105692

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