Attachment 99498 Details for Bug 78679 – Sample program

Sample program

line_aa_freeze.c (text/plain), 3.41 KB, created by Iago Toral on 2014-05-21 10:29:47 UTC

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Filename:

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Creator: Iago Toral

Created: 2014-05-21 10:29:47 UTC

Size: 3.41 KB

patch

obsolete

>/* gcc -o line_aa line_aa_freeze.c -Wall `pkg-config --cflags --libs x11 gl glu`
> */
>
>#include <X11/Xlib.h>
>#include <GL/gl.h>
>#include <GL/glx.h>
>#include <GL/glu.h>
>#include <string.h>
>
>Display *display;
>Window window;
>GLXContext context;
>int width, height;
>
>static int attrListDbl[] =
>{
>    GLX_RGBA,
>    GLX_DOUBLEBUFFER,
>    GLX_RED_SIZE, 8,
>    GLX_GREEN_SIZE, 8,
>    GLX_BLUE_SIZE, 8,
>    GLX_ALPHA_SIZE, 8,
>    GLX_DEPTH_SIZE, 16,
>    None
>};
>
>void initGL(int, int);
>
>void createWindow(int width, int height)
>{
>    display = XOpenDisplay(0);
>    int screen = DefaultScreen(display);
>    Window root = RootWindow(display, screen);
>
>    XVisualInfo *vi = glXChooseVisual(display, screen, attrListDbl);
>    XSetWindowAttributes winAttr;
>    memset(&winAttr, 0, sizeof(XSetWindowAttributes));
>    winAttr.colormap = XCreateColormap (display, root, vi->visual, AllocNone);
>    winAttr.event_mask = ExposureMask | KeyPressMask | ButtonPressMask |
>                         StructureNotifyMask;
>    window = XCreateWindow(display, root, 0, 0, width, height, 0, vi->depth,
>                           InputOutput, vi->visual,
>                           CWBorderPixel | CWColormap | CWEventMask, &winAttr);
>
>    XMapRaised(display, window);
>
>    context = glXCreateContext(display, vi, 0, GL_TRUE);
>    glXMakeCurrent(display, window, context);
>
>    initGL(width, height);
>}
>
>void destroyWindow()
>{
>    if (context) {
>        glXMakeCurrent(display, None, NULL);
>        glXDestroyContext(display, context);
>        context = NULL;
>    }
>    XCloseDisplay(display);
>}
>
>void resizeGL(int _width, int _height)
>{
>    width = _width;
>    height = _height;
>
>    glMatrixMode(GL_PROJECTION);
>    glLoadIdentity();
>    gluPerspective(45.0f, (GLfloat)width / (GLfloat)height, 0.1f, 100.0f);
>
>    glViewport(0, 0, width, height);
>}
>
>void initGL(int width, int height)
>{
>    glEnable(GL_LINE_SMOOTH);
>    glShadeModel(GL_SMOOTH);
>    glHint(GL_LINE_SMOOTH_HINT, GL_NICEST);
>    glLineWidth(1.5);
>    glEnable(GL_BLEND);
>    glBlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
>    glPolygonMode(GL_FRONT, GL_LINE);
>
>    resizeGL(width, height);
>}
>
>void renderGL(int width, int height)
>{
>    static float angle = 0.0;
>
>    glViewport(0, 0, width, height);
>
>    glClearColor(1, 1, 1, 1);
>    glClear(GL_COLOR_BUFFER_BIT);
>
>    glMatrixMode(GL_MODELVIEW);
>    glLoadIdentity();
>
>    glTranslatef(0.0f, 0.0f, -4.0);
>    glRotatef(15.0,  0, 0, 1);
>    glRotatef(angle, 0, 1, 0);
>
>    glBegin(GL_TRIANGLES);
>        glColor4f(1.0f,0.0f,0.0f,1.0);
>        glVertex3f(-0.1f, -1.0f, 0.0f);
>
>        glColor4f(0.0f,1.0f,0.0f,1.0);
>        glVertex3f( 1.0f, -1.0f, 0.0f);
>
>        glColor4f(0.0f,0.0f,1.0f,1.0);
>        glVertex3f( 0.0f, 1.0f, 0.0f);
>    glEnd();
>
>    glXSwapBuffers(display, window);
>
>    angle += 1.0;
>}
>
>int main(int argc, char ** argv)
>{
>    XEvent event;
>    int done = 0;
>
>    createWindow(640, 480);
>
>    while (!done) {
>        while (XPending(display) > 0) {
>            XNextEvent(display, &event);
>            switch (event.type) {
>                case ConfigureNotify:
>                    resizeGL(event.xconfigure.width, event.xconfigure.height);
>                    break;
>                case KeyPress:
>                    if (XLookupKeysym(&event.xkey, 0) == XK_Escape)
>                        done = 1;
>                    break;
>                default:
>                    break;
>            }
>        }
>        renderGL(width, height);
>    }
>
>    destroyWindow();
>
>    return 0;
>}

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Attachments on bug 78679: 99081 | 99498 | 99623 | 99676 | 99840 | 99856 | 99865 | 99875 | 99876

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