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/*
* Test the mini GLX interface.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <GL/gl.h>
#define USE_MINI_GLX 1
#if USE_MINI_GLX
#include <GL/miniglx.h>
#else
#include <GL/glx.h>
#endif
#include "../util/writebuf.c"
static GLXContext ctx;
static GLuint NumFrames = 100;
static GLuint NumDisplays = 1;
static GLboolean Texture = GL_FALSE;
static GLboolean SingleBuffer = GL_FALSE;
static GLboolean Sleeps = GL_TRUE;
static void
rect(GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2)
{
glBegin(GL_QUADS);
glTexCoord2f(0, 0); glColor3f(0, 0, 1); glVertex2f(x1, y1);
glTexCoord2f(1, 0); glColor3f(1, 0, 0); glVertex2f(x2, y1);
glTexCoord2f(1, 1); glColor3f(0, 1, 0); glVertex2f(x2, y2);
glTexCoord2f(0, 1); glColor3f(0, 0, 0); glVertex2f(x1, y2);
glEnd();
}
static void
redraw(Display *dpy, Window w, int rot)
{
GLfloat a;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glPushMatrix();
glRotatef(rot, 0, 0, 1);
glScalef(.5, .5, .5);
for (a = 0.0; a < 360.0; a += 30.0) {
glPushMatrix();
glRotatef(a, 0, 0, 1);
glRotatef(40, 1, 0, 0);
glColor3f(a / 360.0, 1-a/360.0, 0);
rect(0.3, -0.25, 1.5, 0.25);
glPopMatrix();
}
glPopMatrix();
if (SingleBuffer)
glFlush();
else
glXSwapBuffers(dpy, w);
}
static Window
make_window(Display *dpy, unsigned int width, unsigned int height)
{
int attrib_single[] = { GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DEPTH_SIZE, 1,
None };
int attrib_double[] = { GLX_RGBA,
GLX_RED_SIZE, 1,
GLX_GREEN_SIZE, 1,
GLX_BLUE_SIZE, 1,
GLX_DEPTH_SIZE, 1,
GLX_DOUBLEBUFFER,
None };
int *attrib = SingleBuffer ? attrib_single : attrib_double;
int scrnum = 0;
XSetWindowAttributes attr;
unsigned long mask;
Window root;
Window win;
XVisualInfo *visinfo;
root = RootWindow(dpy, scrnum);
if (!(visinfo = glXChooseVisual(dpy, scrnum, attrib))) {
printf("Error: couldn't get an RGB, Double-buffered visual\n");
exit(1);
}
if (!(ctx = glXCreateContext(dpy, visinfo, NULL, True))) {
printf("Error: glXCreateContext failed\n");
exit(1);
}
/* window attributes */
attr.background_pixel = 0;
attr.border_pixel = 0;
attr.colormap = XCreateColormap(dpy, root, visinfo->visual, AllocNone);
attr.event_mask = StructureNotifyMask | ExposureMask;
mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask;
win = XCreateWindow(dpy, root, 0, 0, width, height,
0, visinfo->depth, InputOutput,
visinfo->visual, mask, &attr);
if (!win) {
printf("Error: XCreateWindow failed\n");
exit(1);
}
glXMakeCurrent(dpy, win, ctx);
glViewport(0, 0, width, height);
return win;
}
static void
event_loop(Display *dpy, Window win)
{
int i;
printf("Drawing %d frames\n", NumFrames);
for (i = 0; i < NumFrames; i++) {
redraw(dpy, win, -i*2);
if (i == 1) {
glReadBuffer(GL_BACK);
WritePPMFile("frame1.ppm", 800,600);
}
if (Sleeps) {
usleep(20000);
}
}
}
static int
runtest(void)
{
Display *dpy;
Window win;
dpy = XOpenDisplay(NULL);
if (!dpy) {
printf("Error: XOpenDisplay failed\n");
return 1;
}
win = make_window(dpy, 800, 600);
srand(getpid());
/* init GL state */
glClearColor(0.5, 0.5, 0.5, 1.0);
glEnable(GL_DEPTH_TEST);
if (Texture) {
GLubyte image[16][16][4];
GLint i, j;
for (i = 0; i < 16; i++) {
for (j = 0; j < 16; j++) {
if (((i / 2) ^ (j / 2)) & 1) {
image[i][j][0] = 255;
image[i][j][1] = 255;
image[i][j][2] = 255;
image[i][j][3] = 255;
}
else {
image[i][j][0] = 128;
image[i][j][1] = 128;
image[i][j][2] = 128;
image[i][j][3] = 128;
}
}
}
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 16, 16, 0,
GL_RGBA, GL_UNSIGNED_BYTE, image);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glEnable(GL_TEXTURE_2D);
}
if (SingleBuffer) {
glDrawBuffer(GL_FRONT);
glReadBuffer(GL_FRONT);
}
else {
glDrawBuffer(GL_BACK);
}
XMapWindow(dpy, win);
/* wait for window to get mapped */
{
XEvent e;
while (1) {
XNextEvent(dpy, &e);
if (e.type == MapNotify && e.xmap.window == win) {
break;
}
}
}
event_loop(dpy, win);
glXDestroyContext(dpy, ctx);
XDestroyWindow(dpy, win);
XCloseDisplay(dpy);
return 0;
}
static void
usage(void)
{
printf("Usage:\n");
printf(" -f N render N frames (default %d)\n", NumFrames);
printf(" -d N do N display cycles\n");
printf(" -t texturing\n");
printf(" -s single buffering\n");
printf(" -n no usleep() delay\n");
}
static void
parse_args(int argc, char *argv[])
{
int i;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-f") == 0) {
NumFrames = atoi(argv[i + 1]);
i++;
}
else if (strcmp(argv[i], "-d") == 0) {
NumDisplays = atoi(argv[i + 1]);
i++;
}
else if (strcmp(argv[i], "-n") == 0) {
Sleeps = GL_FALSE;
}
else if (strcmp(argv[i], "-s") == 0) {
SingleBuffer = GL_TRUE;
}
else if (strcmp(argv[i], "-t") == 0) {
Texture = GL_TRUE;
}
else {
usage();
exit(1);
}
}
}
int
main(int argc, char *argv[])
{
int i;
parse_args(argc, argv);
for (i = 0; i < NumDisplays; i++) {
if (runtest() != 0)
break;
}
return 0;
}
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