source: trunk/sys/TinyGL/examples/nanox.c @ 95

/*
 * Demonstration program for Nano-X graphics.
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define MWINCLUDECOLORS
#include <microwin/nano-X.h>
#include <GL/gl.h> 
#include <GL/nglx.h> 
#include "ui.h"

static  GR_WINDOW_ID    w1;             /* id for large window */
static  GR_GC_ID        gc1;            /* graphics context for text */

void errorcatcher();                    /* routine to handle errors */

void tkSwapBuffers(void)
{
    nglXSwapBuffers(w1);
}

int
ui_loop(int argc,char **argv, const char *name)
{
        GR_EVENT        event;          /* current event */
        GR_IMAGE_ID     id = 0;
        NGLXContext cx;
        int width, height, k;

        if (GrOpen() < 0) {
                fprintf(stderr, "cannot open graphics\n");
                exit(1);
        }
        
        width = 400;
        height = 300;

        GrSetErrorHandler(errorcatcher);

        w1 = GrNewWindow(GR_ROOT_WINDOW_ID, 10, 10, width, height, 4, BLACK, WHITE);

        GrSelectEvents(w1, GR_EVENT_MASK_CLOSE_REQ|GR_EVENT_MASK_EXPOSURE|GR_EVENT_MASK_KEY_DOWN);

        GrMapWindow(w1);

        gc1 = GrNewGC();

        GrSetGCForeground(gc1, WHITE);

        cx = nglXCreateContext(NULL, 0);
        nglXMakeCurrent(w1, cx);
        
        init();
        reshape(width, height);

        while (1) {
            GrCheckNextEvent(&event);
            switch(event.type) {
            case GR_EVENT_TYPE_CLOSE_REQ:
                GrFreeImage(id);
                GrClose();
                exit(0);
            case GR_EVENT_TYPE_EXPOSURE:
                break;
            case GR_EVENT_TYPE_KEY_DOWN:
                {
                    GR_EVENT_KEYSTROKE *kp = &event.keystroke;
                    /* XXX: nanoX special keys are totally bugged ! */
                    switch(kp->ch) {
                    case 81:
                        k = KEY_LEFT;
                        break;
                    case 83:
                        k = KEY_RIGHT;
                        break;
                    case 82:
                        k = KEY_UP;
                        break;
                    case 84:
                        k = KEY_DOWN;
                        break;
                    default:
                        k = kp->ch;
                        break;
                    }
                    key(k, 0);
                }
                break;
            default:
                idle();
                break;
            }
        }

        return 0;
}


/*
 * Here on an unrecoverable error.
 */
void
errorcatcher(code, name, id)
        GR_ERROR        code;           /* error code */
        GR_FUNC_NAME    name;           /* function name which failed */
        GR_ID           id;             /* resource id */
{
        GrClose();
        fprintf(stderr, "DEMO ERROR: code %d, function %s, resource id %d\n",
                code, name, id);
        exit(1);
}