X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?a=blobdiff_plain;f=src%2Fmain_x11.c;fp=src%2Fmain_x11.c;h=fe87caafc716a60d8f56df971c81ea0d81bc49d0;hb=16b8c35b3b3df5d47bbec1ffc79ddfa711a74ed1;hp=0000000000000000000000000000000000000000;hpb=98882f6f19a4e239e56d6eb5db453c97b64338fe;p=censuslogo

diff --git a/src/main_x11.c b/src/main_x11.c
new file mode 100644
index 0000000..fe87caa
--- /dev/null
+++ b/src/main_x11.c
@@ -0,0 +1,323 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <unistd.h>
+#include <sys/time.h>
+#include <X11/Xlib.h>
+#include <GL/glx.h>
+#include "app.h"
+#include "vroot.h"
+
+#define DEF_WIN_WIDTH	1280
+#define DEF_WIN_HEIGHT	800
+
+static Window create_xwindow(void);
+static int init_gl(void);
+static void destroy_gl(void);
+static int proc_xevent(XEvent *ev);
+
+static Display *dpy;
+static int scr;
+static Window win, root;
+static GLXContext ctx;
+static XVisualInfo *visinf;
+static Atom xa_wm_proto, xa_wm_delwin;
+
+static volatile int quit;
+static int mapped;
+
+static struct timeval tv, tv0;
+
+int main(int argc, char **argv)
+{
+	int i;
+	unsigned int wid;
+	char *endp;
+
+	if((endp = getenv("XSCREENSAVER_WINDOW"))) {
+		printf("XSCREENSAVER_WINDOW: %s\n", endp);
+	}
+
+	if(!(dpy = XOpenDisplay(0))) {
+		fprintf(stderr, "failed to open connection to the X server\n");
+		return 1;
+	}
+	scr = DefaultScreen(dpy);
+	root = RootWindow(dpy, scr);
+
+	xa_wm_proto = XInternAtom(dpy, "WM_PROTOCOLS", False);
+	xa_wm_delwin = XInternAtom(dpy, "WM_DELETE_WINDOW", False);
+
+	for(i=0; i<argc; i++) {
+		printf("argv[%d]: %s\n", i, argv[i]);
+	}
+
+	for(i=1; i<argc; i++) {
+		if(strcmp(argv[i], "-root") == 0) {
+			argv[i] = argv[--argc];
+			if(!(win = VirtualRootWindowOfScreen(ScreenOfDisplay(dpy, scr)))) {
+				fprintf(stderr, "failed to find root window!\n");
+				XCloseDisplay(dpy);
+				return 1;
+			}
+			i--;
+
+		} else if(strcmp(argv[i], "-window-id") == 0) {
+			if((wid = strtol(argv[i+1], &endp, 0)) > 0 && endp != argv[i+1]) {
+				printf("using window: %x\n", wid);
+				win = (Window)wid;
+				memmove(argv + i, argv + i + 2, (argc - i - 2) * sizeof *argv);
+				argc -= 2;
+				i--;
+			} else {
+				fprintf(stderr, "invalid option: -window-id must be followed by a valid window id\n");
+				XCloseDisplay(dpy);
+				return 1;
+			}
+		}
+	}
+
+	if(app_parse_args(argc, argv) == -1) {
+		XCloseDisplay(dpy);
+		return 1;
+	}
+
+	if(!win && !(win = create_xwindow())) {
+		XCloseDisplay(dpy);
+		return 1;
+	}
+	if(init_gl() == -1) {
+		return 1;
+	}
+	if(app_init() == -1) {
+		destroy_gl();
+		XCloseDisplay(dpy);
+		return 1;
+	}
+
+	gettimeofday(&tv0, 0);
+
+	while(!quit) {
+		while(XPending(dpy)) {
+			XEvent ev;
+			XNextEvent(dpy, &ev);
+			if(proc_xevent(&ev) == -1 || quit) {
+				goto done;
+			}
+		}
+
+		gettimeofday(&tv, 0);
+		msec = (tv.tv_sec - tv0.tv_sec) * 1000 + (tv.tv_usec - tv0.tv_usec) / 1000;
+
+		app_display();
+
+		glXSwapBuffers(dpy, win);
+		assert(glGetError() == GL_NO_ERROR);
+	}
+
+done:
+	destroy_gl();
+	XCloseDisplay(dpy);
+	return 0;
+}
+
+void app_quit(void)
+{
+	exit(0);
+}
+
+void app_fullscreen(void)
+{
+}
+
+void app_windowed(void)
+{
+}
+
+static XVisualInfo *choose_visual(void)
+{
+	int glxattr[] = {
+		GLX_RGBA, GLX_DOUBLEBUFFER,
+		GLX_RED_SIZE, 1,
+		GLX_GREEN_SIZE, 1,
+		GLX_BLUE_SIZE, 1,
+		GLX_DEPTH_SIZE, 1,
+		GLX_SAMPLE_BUFFERS, 1,
+		GLX_SAMPLES, 8,
+		None
+	};
+	int *sample_buffers = glxattr + 10;
+	int *num_samples = glxattr + 13;
+	XVisualInfo *res;
+
+	do {
+		res = glXChooseVisual(dpy, scr, glxattr);
+		*num_samples >>= 1;
+		if(*num_samples <= 1) {
+			*sample_buffers = None;
+		}
+	} while(!res && *num_samples > 0);
+
+	return res;
+}
+
+static XVisualInfo *match_visual(Window win)
+{
+	int numvi, i;
+	XVisualInfo vitmp, *vi;
+	XWindowAttributes wattr;
+	unsigned int mask = VisualScreenMask | VisualDepthMask | VisualClassMask;
+
+	XGetWindowAttributes(dpy, win, &wattr);
+
+	vitmp.visualid = XVisualIDFromVisual(wattr.visual);
+	vi = XGetVisualInfo(dpy, VisualIDMask, &vitmp, &numvi);
+	vitmp = *vi;
+	vi = XGetVisualInfo(dpy, mask, &vitmp, &numvi);
+
+	printf("found %d matching visuals\n", numvi);
+	for(i=0; i<numvi; i++) {
+		int nsamp;
+
+		glXGetConfig(dpy, vi + i, GLX_SAMPLES, &nsamp);
+
+		printf("%x (msaa: %d)\n", (unsigned int)vi[i].visualid, nsamp);
+	}
+	return 0;
+}
+
+static Window create_xwindow(void)
+{
+	XSetWindowAttributes xattr;
+	long xattr_mask, evmask;
+
+	if(!(visinf = choose_visual())) {
+		fprintf(stderr, "failed to find appropriate visual\n");
+		return 0;
+	}
+
+	xattr.colormap = XCreateColormap(dpy, root, visinf->visual, AllocNone);
+	xattr.background_pixel = BlackPixel(dpy, scr);
+	xattr_mask = CWColormap | CWBackPixel;
+
+	if(!(win = XCreateWindow(dpy, root, 0, 0, DEF_WIN_WIDTH, DEF_WIN_HEIGHT, 0,
+			visinf->depth, InputOutput, visinf->visual, xattr_mask, &xattr))) {
+		fprintf(stderr, "failed to create X window\n");
+		XFree(visinf);
+		visinf = 0;
+		return 0;
+	}
+
+	evmask = ExposureMask | StructureNotifyMask | KeyPressMask;
+	XSelectInput(dpy, win, evmask);
+
+	Xutf8SetWMProperties(dpy, win, "census", "census", 0, 0, 0, 0, 0);
+	XSetWMProtocols(dpy, win, &xa_wm_delwin, 1);
+
+	XMapRaised(dpy, win);
+	return win;
+}
+
+static int init_gl(void)
+{
+	XWindowAttributes wattr;
+	int rbits, gbits, bbits, zbits, sbits, nsamp;
+
+	if(!win) return -1;
+
+	XGetWindowAttributes(dpy, win, &wattr);
+
+	if(!visinf && !(visinf = choose_visual())) {
+		fprintf(stderr, "failed to find appropriate visual\n");
+		return -1;
+	}
+
+	if(!(ctx = glXCreateContext(dpy, visinf, 0, 1))) {
+		fprintf(stderr, "failed to create OpenGL context\n");
+		XFree(visinf);
+		if(win != root) {
+			XDestroyWindow(dpy, win);
+		}
+		return -1;
+	}
+
+	glXGetConfig(dpy, visinf, GLX_RED_SIZE, &rbits);
+	glXGetConfig(dpy, visinf, GLX_GREEN_SIZE, &gbits);
+	glXGetConfig(dpy, visinf, GLX_BLUE_SIZE, &bbits);
+	glXGetConfig(dpy, visinf, GLX_DEPTH_SIZE, &zbits);
+	glXGetConfig(dpy, visinf, GLX_STENCIL_SIZE, &sbits);
+	glXGetConfig(dpy, visinf, GLX_SAMPLES, &nsamp);
+
+	printf("created GLX visual %d bpp (%d%d%d), %dz, %ds, %d samp/pix\n",
+			visinf->depth, rbits, gbits, bbits, zbits, sbits, nsamp);
+
+	printf("glXMakeCurrent(%p, %x, %p)\n", (void*)dpy, (unsigned int)win, (void*)ctx);
+	glXMakeCurrent(dpy, win, ctx);
+	app_reshape(wattr.width, wattr.height);
+	win_width = wattr.width;
+	win_height = wattr.height;
+	return 0;
+}
+
+static void destroy_gl(void)
+{
+	if(visinf) {
+		XFree(visinf);
+	}
+	if(ctx) {
+		glXMakeCurrent(dpy, 0, 0);
+		glXDestroyContext(dpy, ctx);
+	}
+	if(win && win != root) {
+		XDestroyWindow(dpy, win);
+	}
+}
+
+static int proc_xevent(XEvent *ev)
+{
+	KeySym sym;
+
+	switch(ev->type) {
+	case MapNotify:
+		mapped = 1;
+		break;
+
+	case UnmapNotify:
+		mapped = 0;
+		break;
+
+	case ConfigureNotify:
+		if(ev->xconfigure.width != win_width || ev->xconfigure.height != win_height) {
+			int w = ev->xconfigure.width;
+			int h = ev->xconfigure.height;
+			app_reshape(w, h);
+			win_width = w;
+			win_height = h;
+		}
+		break;
+
+	case KeyPress:
+	case KeyRelease:
+		if((sym = XLookupKeysym(&ev->xkey, 0))) {
+			if(sym == XK_Escape) {
+				sym = 27;
+			}
+			app_keyboard(sym, ev->type == KeyPress);
+		}
+		break;
+
+	case ClientMessage:
+		if(ev->xclient.message_type == xa_wm_proto) {
+			if(ev->xclient.data.l[0] == xa_wm_delwin) {
+				app_quit();
+			}
+		}
+		break;
+
+	default:
+		break;
+	}
+
+	return 0;
+}