Attachment 130157 Details for Bug 100151 – Standalone OpenGL program for reproducing this issue

Standalone OpenGL program for reproducing this issue

OpenGLXORApp.cpp (text/plain), 2.86 KB, created by Pradeep Yadav on 2017-03-10 19:00:25 UTC

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Creator: Pradeep Yadav

Created: 2017-03-10 19:00:25 UTC

Size: 2.86 KB

patch

obsolete

>#include <GL/glut.h>
>
>#include <iostream>
>
>using namespace std;
>
>static float g_theta = 30.0f;
>
>static float g_x1 = 0;
>static float g_y1 = 0;
>
>static float g_x2 = 0;
>static float g_y2 = 0;
>
>bool g_eraseOld = false;
>
>
>void Init()
>{
>    glMatrixMode(GL_PROJECTION);
>    glOrtho(-1.0f, 1.0f, -1.0f, 1.0f, 1.0f, -10.f);
>
>    glMatrixMode(GL_MODELVIEW);
>    glLoadIdentity();
>
>    glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
>}
>
>void DrawModel()
>{
>    glColor3f(1, 1, 0);
>    glPushMatrix();
>
>    glBegin(GL_TRIANGLES);
>    glColor3f(0.0, 0.0, 1.0);
>        glVertex3f(0.0, 0.0, 0.0);
>        glVertex3f(1.0, 0.0, 0.0);
>        glVertex3f(0.0, 1.0, 0.0);
>    glEnd();
>
>    glPopMatrix();
>}
>
>void OnDisplay()
>{
>    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
>
>    DrawModel();
>
>    glutSwapBuffers();
>}
>
>void OnReshape(int w, int h)
>{
>    glViewport(0, 0, w, h);
>}
>
>void OnIdle()
>{
>    //g_theta += 0.5f;
>    //glutPostRedisplay();
>}
>
>void DrawRectangle(float x1, float y1, float x2, float y2)
>{
>    glPushMatrix();
>        glBegin(GL_LINES);
>
>            glVertex2f(x1, y1);
>            glVertex2f(x2, y1);
>
>            glVertex2f(x2, y1);
>            glVertex2f(x2, y2);
>
>            glVertex2f(x2, y2);
>            glVertex2f(x1, y2);
>
>            glVertex2f(x1, y2);
>            glVertex2f(x1, y1);
>
>        glEnd();
>    glPopMatrix();
>}
>
>void OnMouse(int button, int state, int x, int y)
>{
>    g_x1 = static_cast<float>(x-250)/500.0f;
>    g_y1 = static_cast<float>(500-y)/500.0f;
>
>    if (state == 0)
>    {
>        glEnable(GL_COLOR_LOGIC_OP);
>        glLogicOp(GL_XOR);
>        glDrawBuffer(GL_FRONT);
>    }
>    else
>    {
>        glDisable(GL_COLOR_LOGIC_OP);
>        glLogicOp(GL_COPY);
>        glDrawBuffer(GL_BACK);
>        g_eraseOld = false;
>    }
>}
>
>void OnMouseMove(int x, int y)
>{
>    float x2 = static_cast<float>(x-250)/500.0f;
>    float y2 = static_cast<float>(500 - y)/500.0f;
>
>    //glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
>
>    //DrawModel();
>
>    glColor3f(1, 0, 0);
>
>    if (g_eraseOld)
>    {
>        DrawRectangle(g_x1, g_y1, g_x2, g_y2);
>    }
>
>    DrawRectangle(g_x1, g_y1, x2, y2);
>
>    g_x2 = x2;
>    g_y2 = y2;
>    g_eraseOld = true;
>
>    glFlush();
>}
>
>int main(int argc, char* argv[])
>{
>    glutInit(&argc, argv);
>    glutInitDisplayMode(GLUT_DOUBLE | GLUT_DEPTH | GLUT_RGBA);
>    glutInitWindowSize(500, 500);
>    glutInitWindowPosition(100, 100);
>    glutCreateWindow("OpenGL Experiment for Remote Desktop");
>
>    const char* str = reinterpret_cast<const char*>(glGetString(GL_VERSION));
>    cout << "GL Version: " << str << endl;
>    
>    Init();
>
>    glutDisplayFunc(OnDisplay);
>    glutReshapeFunc(OnReshape);
>    glutMotionFunc(OnMouseMove);
>    glutMouseFunc(OnMouse);
>    glutIdleFunc(OnIdle);
>
>    glutMainLoop();
>
>    return 0;
>}

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Attachments on bug 100151: 130157

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