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sync up with glxgears.c from master

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This commit is contained in:
Brian Paul
2008-06-04 16:54:26 -06:00
parent 25641d599f
commit d8de01ba41
1 changed files with 121 additions and 75 deletions
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196
progs/xdemos/glxgears.c
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@@ -88,12 +88,18 @@ current_time(void)
#endif
/** Event handler results: */
#define NOP 0
#define EXIT 1
#define DRAW 2
static GLfloat view_rotx = 20.0, view_roty = 30.0, view_rotz = 0.0;
static GLint gear1, gear2, gear3;
static GLfloat angle = 0.0;
static GLboolean fullscreen = GL_FALSE; /* Create a single fullscreen window */
static GLboolean stereo = GL_FALSE; /* Enable stereo. */
static GLboolean animate = GL_TRUE; /* Animation */
static GLfloat eyesep = 5.0; /* Eye separation. */
static GLfloat fix_point = 40.0; /* Fixation point distance. */
static GLfloat left, right, asp; /* Stereo frustum params. */
@@ -239,7 +245,7 @@ gear(GLfloat inner_radius, GLfloat outer_radius, GLfloat width,
static void
do_draw(void)
draw(void)
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
@@ -269,8 +275,9 @@ do_draw(void)
glPopMatrix();
}
static void
draw(void)
draw_gears(void)
{
if (stereo) {
/* First left eye. */
@@ -284,7 +291,7 @@ draw(void)
glPushMatrix();
glTranslated(+0.5 * eyesep, 0.0, 0.0);
do_draw();
draw();
glPopMatrix();
/* Then right eye. */
@@ -298,10 +305,50 @@ draw(void)
glPushMatrix();
glTranslated(-0.5 * eyesep, 0.0, 0.0);
do_draw();
draw();
glPopMatrix();
} else
do_draw();
}
else {
draw();
}
}
/** Draw single frame, do SwapBuffers, compute FPS */
static void
draw_frame(Display *dpy, Window win)
{
static int frames = 0;
static double tRot0 = -1.0, tRate0 = -1.0;
double dt, t = current_time();
if (tRot0 < 0.0)
tRot0 = t;
dt = t - tRot0;
tRot0 = t;
if (animate) {
/* advance rotation for next frame */
angle += 70.0 * dt; /* 70 degrees per second */
if (angle > 3600.0)
angle -= 3600.0;
}
draw_gears();
glXSwapBuffers(dpy, win);
frames++;
if (tRate0 < 0.0)
tRate0 = t;
if (t - tRate0 >= 5.0) {
GLfloat seconds = t - tRate0;
GLfloat fps = frames / seconds;
printf("%d frames in %3.1f seconds = %6.3f FPS\n", frames, seconds,
fps);
tRate0 = t;
frames = 0;
}
}
@@ -319,7 +366,8 @@ reshape(int width, int height)
left = -5.0 * ((w - 0.5 * eyesep) / fix_point);
right = 5.0 * ((w + 0.5 * eyesep) / fix_point);
} else {
}
else {
GLfloat h = (GLfloat) height / (GLfloat) width;
glMatrixMode(GL_PROJECTION);
@@ -430,10 +478,11 @@ make_window( Display *dpy, const char *name,
attr.border_pixel = 0;
attr.colormap = XCreateColormap( dpy, root, visinfo->visual, AllocNone);
attr.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
/* XXX this is a bad way to get a borderless window! */
attr.override_redirect = fullscreen;
mask = CWBackPixel | CWBorderPixel | CWColormap | CWEventMask | CWOverrideRedirect;
win = XCreateWindow( dpy, root, 0, 0, width, height,
win = XCreateWindow( dpy, root, x, y, width, height,
0, visinfo->depth, InputOutput,
visinfo->visual, mask, &attr );
@@ -463,79 +512,70 @@ make_window( Display *dpy, const char *name,
}
/**
* Handle one X event.
* \return NOP, EXIT or DRAW
*/
static int
handle_event(Display *dpy, Window win, XEvent *event)
{
switch (event->type) {
case Expose:
return DRAW;
case ConfigureNotify:
reshape(event->xconfigure.width, event->xconfigure.height);
break;
case KeyPress:
{
char buffer[10];
int r, code;
code = XLookupKeysym(&event->xkey, 0);
if (code == XK_Left) {
view_roty += 5.0;
}
else if (code == XK_Right) {
view_roty -= 5.0;
}
else if (code == XK_Up) {
view_rotx += 5.0;
}
else if (code == XK_Down) {
view_rotx -= 5.0;
}
else {
r = XLookupString(&event->xkey, buffer, sizeof(buffer),
NULL, NULL);
if (buffer[0] == 27) {
/* escape */
return EXIT;
}
else if (buffer[0] == 'a' || buffer[0] == 'A') {
animate = !animate;
}
}
return DRAW;
}
}
return NOP;
}
static void
event_loop(Display *dpy, Window win)
{
while (1) {
while (XPending(dpy) > 0) {
int op;
while (!animate || XPending(dpy) > 0) {
XEvent event;
XNextEvent(dpy, &event);
switch (event.type) {
case Expose:
/* we'll redraw below */
break;
case ConfigureNotify:
reshape(event.xconfigure.width, event.xconfigure.height);
break;
case KeyPress:
{
char buffer[10];
int r, code;
code = XLookupKeysym(&event.xkey, 0);
if (code == XK_Left) {
view_roty += 5.0;
}
else if (code == XK_Right) {
view_roty -= 5.0;
}
else if (code == XK_Up) {
view_rotx += 5.0;
}
else if (code == XK_Down) {
view_rotx -= 5.0;
}
else {
r = XLookupString(&event.xkey, buffer, sizeof(buffer),
NULL, NULL);
if (buffer[0] == 27) {
/* escape */
return;
}
}
}
}
op = handle_event(dpy, win, &event);
if (op == EXIT)
return;
else if (op == DRAW)
break;
}
{
static int frames = 0;
static double tRot0 = -1.0, tRate0 = -1.0;
double dt, t = current_time();
if (tRot0 < 0.0)
tRot0 = t;
dt = t - tRot0;
tRot0 = t;
/* advance rotation for next frame */
angle += 70.0 * dt; /* 70 degrees per second */
if (angle > 3600.0)
angle -= 3600.0;
draw();
glXSwapBuffers(dpy, win);
frames++;
if (tRate0 < 0.0)
tRate0 = t;
if (t - tRate0 >= 5.0) {
GLfloat seconds = t - tRate0;
GLfloat fps = frames / seconds;
printf("%d frames in %3.1f seconds = %6.3f FPS\n", frames, seconds,
fps);
tRate0 = t;
frames = 0;
}
}
draw_frame(dpy, win);
}
}
@@ -548,13 +588,15 @@ usage(void)
printf(" -stereo run in stereo mode\n");
printf(" -fullscreen run in fullscreen mode\n");
printf(" -info display OpenGL renderer info\n");
printf(" -geometry WxH+X+Y window geometry\n");
}
int
main(int argc, char *argv[])
{
const int winWidth = 300, winHeight = 300;
unsigned int winWidth = 300, winHeight = 300;
int x = 0, y = 0;
Display *dpy;
Window win;
GLXContext ctx;
@@ -576,6 +618,10 @@ main(int argc, char *argv[])
else if (strcmp(argv[i], "-fullscreen") == 0) {
fullscreen = GL_TRUE;
}
else if (i < argc-1 && strcmp(argv[i], "-geometry") == 0) {
XParseGeometry(argv[i+1], &x, &y, &winWidth, &winHeight);
i++;
}
else {
usage();
return -1;
@@ -589,7 +635,7 @@ main(int argc, char *argv[])
return -1;
}
make_window(dpy, "glxgears", 0, 0, winWidth, winHeight, &win, &ctx);
make_window(dpy, "glxgears", x, y, winWidth, winHeight, &win, &ctx);
XMapWindow(dpy, win);
glXMakeCurrent(dpy, win, ctx);