+++ /dev/null
-
-/*
- * Example of using the X "shape" extension with OpenGL: render a spinning
- * cube inside of a non-rectangular window.
- *
- * Press ESC to exit. Press up/down to change window shape.
- *
- * To compile add "shape" to the PROGS list in Makefile.
- *
- * Brian Paul
- * June 16, 1997
- *
- * This program is in the public domain.
- */
-
-
-#include <math.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/time.h>
-#include <time.h>
-#include <unistd.h>
-#include <X11/Xlib.h>
-#include <X11/Xutil.h>
-#include <X11/keysym.h>
-#include <X11/extensions/shape.h>
-#include <GL/glx.h>
-
-#ifndef PI
-#define PI 3.1415926
-#endif
-
-
-static int Width=500, Height=500;
-
-static float Xangle = 0.0, Yangle = 0.0;
-static int Sides = 5;
-static int MinSides = 3;
-static int MaxSides = 20;
-
-
-/* return current time (in seconds) */
-static double
-current_time(void)
-{
- struct timeval tv;
-#ifdef __VMS
- (void) gettimeofday(&tv, NULL );
-#else
- struct timezone tz;
- (void) gettimeofday(&tv, &tz);
-#endif
- return (double) tv.tv_sec + tv.tv_usec / 1000000.0;
-}
-
-
-/*
- * Draw the OpenGL stuff and do a SwapBuffers.
- */
-static void display(Display *dpy, Window win)
-{
- float scale = 1.7;
-
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glPushMatrix();
-
- glScalef(scale, scale, scale);
- glRotatef(Xangle, 1.0, 0.0, 0.0);
- glRotatef(Yangle, 0.0, 1.0, 0.0);
-
- /*
- * wireframe box
- */
- glColor3f(1.0, 1.0, 1.0);
- glBegin(GL_LINE_LOOP);
- glVertex3f(-1.0, -1.0, -1.0);
- glVertex3f( 1.0, -1.0, -1.0);
- glVertex3f( 1.0, 1.0, -1.0);
- glVertex3f(-1.0, 1.0, -1.0);
- glEnd();
-
- glBegin(GL_LINE_LOOP);
- glVertex3f(-1.0, -1.0, 1.0);
- glVertex3f( 1.0, -1.0, 1.0);
- glVertex3f( 1.0, 1.0, 1.0);
- glVertex3f(-1.0, 1.0, 1.0);
- glEnd();
-
- glBegin(GL_LINES);
- glVertex3f(-1.0, -1.0, -1.0); glVertex3f(-1.0, -1.0, 1.0);
- glVertex3f( 1.0, -1.0, -1.0); glVertex3f( 1.0, -1.0, 1.0);
- glVertex3f( 1.0, 1.0, -1.0); glVertex3f( 1.0, 1.0, 1.0);
- glVertex3f(-1.0, 1.0, -1.0); glVertex3f(-1.0, 1.0, 1.0);
- glEnd();
-
- /*
- * Solid box
- */
- glPushMatrix();
- glScalef(0.75, 0.75, 0.75);
-
- glColor3f(1, 0, 0);
- glBegin(GL_POLYGON);
- glVertex3f(1, -1, -1);
- glVertex3f(1, 1, -1);
- glVertex3f(1, 1, 1);
- glVertex3f(1, -1, 1);
- glEnd();
-
- glColor3f(0, 1, 1);
- glBegin(GL_POLYGON);
- glVertex3f(-1, -1, -1);
- glVertex3f(-1, 1, -1);
- glVertex3f(-1, 1, 1);
- glVertex3f(-1, -1, 1);
- glEnd();
-
- glColor3f(0, 1, 0);
- glBegin(GL_POLYGON);
- glVertex3f(-1, 1, -1);
- glVertex3f( 1, 1, -1);
- glVertex3f( 1, 1, 1);
- glVertex3f(-1, 1, 1);
- glEnd();
-
- glColor3f(1, 0, 1);
- glBegin(GL_POLYGON);
- glVertex3f(-1, -1, -1);
- glVertex3f( 1, -1, -1);
- glVertex3f( 1, -1, 1);
- glVertex3f(-1, -1, 1);
- glEnd();
-
- glColor3f(0, 0, 1);
- glBegin(GL_POLYGON);
- glVertex3f(-1, -1, 1);
- glVertex3f( 1, -1, 1);
- glVertex3f( 1, 1, 1);
- glVertex3f(-1, 1, 1);
- glEnd();
-
- glColor3f(1, 1, 0);
- glBegin(GL_POLYGON);
- glVertex3f(-1, -1, -1);
- glVertex3f( 1, -1, -1);
- glVertex3f( 1, 1, -1);
- glVertex3f(-1, 1, -1);
- glEnd();
- glPopMatrix();
-
-
- glPopMatrix();
-
- glXSwapBuffers(dpy, win);
-}
-
-
-/*
- * This is called when we have to recompute the window shape bitmask.
- * We just generate an n-sided regular polygon here but any other shape
- * would be possible.
- */
-static void make_shape_mask(Display *dpy, Window win, int width, int height,
- int sides)
-{
- Pixmap shapeMask;
- XGCValues xgcv;
- GC gc;
-
- /* allocate 1-bit deep pixmap and a GC */
- shapeMask = XCreatePixmap(dpy, win, width, height, 1);
- gc = XCreateGC(dpy, shapeMask, 0, &xgcv);
-
- /* clear shapeMask to zeros */
- XSetForeground(dpy, gc, 0);
- XFillRectangle(dpy, shapeMask, gc, 0, 0, width, height);
-
- /* draw mask */
- XSetForeground(dpy, gc, 1);
- {
- int cx = width / 2;
- int cy = height / 2;
- float angle = 0.0;
- float step = 2.0 * PI / sides;
- float radius = width / 2;
- int i;
- XPoint points[100];
- for (i=0;i<sides;i++) {
- int x = cx + radius * sin(angle);
- int y = cy - radius * cos(angle);
- points[i].x = x;
- points[i].y = y;
- angle += step;
- }
- XFillPolygon(dpy, shapeMask, gc, points, sides, Convex, CoordModeOrigin);
- }
-
- /* This is the only SHAPE extension call- simple! */
- XShapeCombineMask(dpy, win, ShapeBounding, 0, 0, shapeMask, ShapeSet);
-
- XFreeGC(dpy, gc);
- XFreePixmap(dpy, shapeMask);
-}
-
-
-/*
- * Called when window is resized. Do OpenGL viewport and projection stuff.
- */
-static void reshape(int width, int height)
-{
- glViewport(0, 0, width, height);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glFrustum(-1.0, 1.0, -1.0, 1.0, 3.0, 20.0);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glTranslatef(0.0, 0.0, -10.0);
-
- glEnable(GL_DEPTH_TEST);
-}
-
-
-/*
- * Process X events.
- */
-static void event_loop(Display *dpy, Window win)
-{
- while (1) {
- XEvent event;
- if (XPending(dpy)) {
- XNextEvent(dpy, &event);
- switch (event.type) {
- case Expose:
- display(dpy, event.xexpose.window);
- break;
- case ConfigureNotify:
- Width = event.xconfigure.width;
- Height = event.xconfigure.height,
- make_shape_mask(dpy, win, Width, Height, Sides);
- reshape(Width, Height);
- break;
- case KeyPress:
- {
- char buf[100];
- KeySym keySym;
- XComposeStatus stat;
- XLookupString(&event.xkey, buf, sizeof(buf), &keySym, &stat);
- switch (keySym) {
- case XK_Escape:
- exit(0);
- break;
- case XK_Up:
- Sides++;
- if (Sides>MaxSides) Sides = MaxSides;
- make_shape_mask(dpy, win, Width, Height, Sides);
- break;
- case XK_Down:
- Sides--;
- if (Sides<MinSides) Sides = MinSides;
- make_shape_mask(dpy, win, Width, Height, Sides);
- break;
- }
- }
- break;
- default:
- ;;
- }
- }
- else {
- static double t0 = -1.0;
- double dt, t = current_time();
- if (t0 < 0.0)
- t0 = t;
- dt = t - t0;
- Xangle += 90.0 * dt; /* 90 degrees per second */
- Yangle += 70.0 * dt;
- t0 = t;
- display(dpy, win);
- }
- }
-}
-
-
-/*
- * Allocate a "nice" colormap. This could be better (HP-CR support, etc).
- */
-static Colormap alloc_colormap(Display *dpy, Window parent, Visual *vis)
-{
- Screen *scr = DefaultScreenOfDisplay(dpy);
- int scrnum = DefaultScreen(dpy);
-
- if (MaxCmapsOfScreen(scr)==1 && vis==DefaultVisual(dpy, scrnum)) {
- /* The window and root are of the same visual type so */
- /* share the root colormap. */
- return DefaultColormap(dpy, scrnum);
- }
- else {
- return XCreateColormap(dpy, parent, vis, AllocNone);
- }
-}
-
-
-int main(int argc, char *argv[])
-{
- static int glAttribs[] = {
- GLX_DOUBLEBUFFER,
- GLX_RGBA,
- GLX_DEPTH_SIZE, 1,
- None
- };
- Display *dpy;
- XVisualInfo *visInfo;
- int scrn;
- Window root;
- Colormap cmap;
- Window win;
- XSetWindowAttributes winAttribs;
- unsigned long winAttribsMask;
- GLXContext glCtx;
- int ignore;
- const char *name = "OpenGL in a Shaped Window";
-
- dpy = XOpenDisplay(NULL);
- if (!dpy) {
- fprintf(stderr, "Couldn't open default display\n");
- return 1;
- }
-
- /* check that we can use the shape extension */
- if (!XQueryExtension(dpy, "SHAPE", &ignore, &ignore, &ignore )) {
- fprintf(stderr, "Display doesn't support shape extension\n");
- return 1;
- }
-
- scrn = DefaultScreen(dpy);
-
- root = RootWindow(dpy, scrn);
-
- visInfo = glXChooseVisual(dpy, scrn, glAttribs);
- if (!visInfo) {
- fprintf(stderr, "Couldn't get RGB, DB, Z visual\n");
- return 1;
- }
-
- glCtx = glXCreateContext(dpy, visInfo, 0, True);
- if (!glCtx) {
- fprintf(stderr, "Couldn't create GL context\n");
- return 1;
- }
-
- cmap = alloc_colormap(dpy, root, visInfo->visual);
- if (!cmap) {
- fprintf(stderr, "Couln't create colormap\n");
- return 1;
- }
-
- winAttribs.border_pixel = 0;
- winAttribs.colormap = cmap;
- winAttribs.event_mask = StructureNotifyMask | ExposureMask | KeyPressMask;
- winAttribsMask = CWBorderPixel | CWColormap | CWEventMask;
- win = XCreateWindow(dpy, root, 0, 0, Width, Height, 0,
- visInfo->depth, InputOutput,
- visInfo->visual,
- winAttribsMask, &winAttribs);
-
- {
- XSizeHints sizehints;
- /*
- sizehints.x = xpos;
- sizehints.y = ypos;
- sizehints.width = width;
- sizehints.height = height;
- */
- sizehints.flags = 0;
- XSetNormalHints(dpy, win, &sizehints);
- XSetStandardProperties(dpy, win, name, name,
- None, (char **)NULL, 0, &sizehints);
- }
-
-
- XMapWindow(dpy, win);
-
- glXMakeCurrent(dpy, win, glCtx);
-
- printf("GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
- printf("Press ESC to exit.\n");
- printf("Press up/down to change window shape.\n");
-
- event_loop(dpy, win);
-
- return 0;
-}
projects / mesa.git / blobdiff