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1 jakw 1 
#include "ProjectorOpenGL.h"
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ProjectorOpenGL::ProjectorOpenGL(unsigned int _screenNum){
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    // Create the OpenGL context
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    context = new OpenGLContext(_screenNum);
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    // OpenGL setup
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    context->makeContextCurrent();
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    glEnable(GL_TEXTURE_2D);
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    glClearColor(1.0, 1.0, 1.0, 1.0);
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    glClear(GL_COLOR_BUFFER_BIT);
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    // Set up for 1:1 pixel mapping in the z=0 plane. Upper left corner is (0,0).
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    glViewport(0, 0, context->getScreenResX(), context->getScreenResY());
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    glMatrixMode(GL_PROJECTION);
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    glLoadIdentity();
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    glOrtho(0, context->getScreenResX(), context->getScreenResY(), 0, -1, 1);
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    glMatrixMode(GL_MODELVIEW);
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    glLoadIdentity();
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    context->flush();
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}
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void ProjectorOpenGL::setPattern(unsigned int patternNumber, const unsigned char *tex, unsigned int texWidth, unsigned int texHeight){
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    context->makeContextCurrent();
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    if(patternNumber+1 == textures.size()+1){
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        texture tex;
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        glGenTextures(1, &tex.texName);
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        tex.width = texWidth;
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        tex.height = texHeight;
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        textures.push_back(tex);
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    } else if (patternNumber+1 > textures.size()+1){
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        std::cerr << "ProjectorOpenGL: cannot set pattern " << patternNumber << " before setting " << textures.size() << " -- " << patternNumber-1 << std::endl;
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    }
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    glBindTexture(GL_TEXTURE_2D, textures[patternNumber].texName);
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    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, texWidth, texHeight, 0, GL_RGB, GL_UNSIGNED_BYTE, tex);
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    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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}
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void ProjectorOpenGL::displayPattern(unsigned int patternNumber){
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    if(patternNumber+1 > textures.size()){
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        std::cerr << "ProjectorOpenGL: cannot display texture " << patternNumber << "! Out of bounds." << std::endl;
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        return;
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    }
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    glClear(GL_COLOR_BUFFER_BIT);
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    glBindTexture(GL_TEXTURE_2D, textures[patternNumber].texName);
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    float texWidthf = (float)context->getScreenResX()/textures[patternNumber].width;
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    float texHeightf = (float)context->getScreenResY()/textures[patternNumber].height;
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    glBegin(GL_QUADS);
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        glTexCoord2f(0, 0); glVertex2i(0, 0);
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        glTexCoord2f(texWidthf, 0); glVertex2i(context->getScreenResX(), 0);
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        glTexCoord2f(texWidthf, texHeightf); glVertex2i(context->getScreenResX(), context->getScreenResY());
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        glTexCoord2f(0, texHeightf); glVertex2i(0, context->getScreenResY());
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    glEnd();
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    context->flush();
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}
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void ProjectorOpenGL::displayTexture(const unsigned char *tex, unsigned int texWidth, unsigned int texHeight){
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    context->makeContextCurrent();
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    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, texWidth, texHeight, 0, GL_RGB, GL_UNSIGNED_BYTE, tex);
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    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
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    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
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    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
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    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
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    float texWidthf = (float)context->getScreenResX()/texWidth;
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    float texHeightf = (float)context->getScreenResY()/texHeight;
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    glBegin(GL_QUADS);
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        glTexCoord2f(0, 0); glVertex2i(0, 0);
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        glTexCoord2f(texWidthf, 0); glVertex2i(context->getScreenResX(), 0);
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        glTexCoord2f(texWidthf, texHeightf); glVertex2i(context->getScreenResX(), context->getScreenResY());
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        glTexCoord2f(0, texHeightf); glVertex2i(0, context->getScreenResY());
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    glEnd();
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    context->flush();
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}
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void ProjectorOpenGL::displayBlack(){
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    context->makeContextCurrent();
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    glClearColor(0.0, 0.0, 0.0, 1.0);
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    glClear(GL_COLOR_BUFFER_BIT);
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    context->flush();
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}
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void ProjectorOpenGL::displayWhite(){
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    context->makeContextCurrent();
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    glClearColor(1.0, 1.0, 1.0, 1.0);
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    glClear(GL_COLOR_BUFFER_BIT);
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    context->flush();
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}
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void ProjectorOpenGL::getScreenRes(unsigned int *nx, unsigned int *ny){
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    *nx = context->getScreenResX();
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    *ny = context->getScreenResY();
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}
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ProjectorOpenGL::~ProjectorOpenGL(){
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    context->makeContextCurrent();
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    delete context;
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}
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