xglcomp

annotate src/main.cc @ 14:db2e91f95531

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author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 07 Feb 2016 11:52:56 +0200
parents 593a5e4a351f
children 6726f29ebbb8
rev   line source
nuclear@0 1 #include <stdio.h>
nuclear@0 2 #include <stdlib.h>
nuclear@0 3 #include <unistd.h>
nuclear@0 4 #include <X11/Xlib.h>
nuclear@0 5 #include <X11/Xutil.h>
nuclear@0 6 #include <X11/Xatom.h>
nuclear@0 7 #include <X11/extensions/Xcomposite.h>
nuclear@1 8 #include <X11/extensions/Xdamage.h>
nuclear@5 9 #include <X11/extensions/shape.h>
nuclear@0 10 #include "cwin.h"
nuclear@2 11 #include "opengl.h"
nuclear@1 12 #include "logger.h"
nuclear@9 13 #include "xerr.h"
nuclear@9 14
nuclear@1 15
nuclear@5 16 static bool query_extensions();
nuclear@1 17 static bool register_compositor();
nuclear@2 18 static void start_comp();
nuclear@2 19 static void manage_window(Window xwin);
nuclear@2 20 static void unmanage_window(Window xwin);
nuclear@7 21 static void damage_window(XDamageNotifyEvent *ev);
nuclear@2 22 static void redraw();
nuclear@3 23 static void draw_window(CompWindow *cwin);
nuclear@2 24 static void reshape(int x, int y);
nuclear@1 25
nuclear@2 26 Display *dpy;
nuclear@2 27 int screen_num;
nuclear@2 28 Window root_win, comp_win;
nuclear@2 29 int root_width, root_height;
nuclear@1 30
nuclear@5 31 static int xdmg_ev_base, xdmg_err_base;
nuclear@5 32 static int xshape_ev_base, xshape_err_base;
nuclear@5 33
nuclear@1 34 int main(int argc, char **argv)
nuclear@1 35 {
nuclear@1 36 if(!(dpy = XOpenDisplay(0))) {
nuclear@1 37 log_error("failed to open X display\n");
nuclear@1 38 return 1;
nuclear@1 39 }
nuclear@2 40 screen_num = DefaultScreen(dpy);
nuclear@2 41 root_win = RootWindow(dpy, screen_num);
nuclear@2 42 root_width = DisplayWidth(dpy, screen_num);
nuclear@2 43 root_height = DisplayHeight(dpy, screen_num);
nuclear@1 44 log_info("display size %dx%d\n", root_width, root_height);
nuclear@1 45
nuclear@5 46 if(!query_extensions()) {
nuclear@1 47 return 1;
nuclear@1 48 }
nuclear@1 49
nuclear@1 50 if(!register_compositor()) {
nuclear@1 51 return 1;
nuclear@1 52 }
nuclear@1 53
nuclear@2 54 comp_win = XCompositeGetOverlayWindow(dpy, root_win);
nuclear@2 55 if(!create_gl(comp_win)) {
nuclear@2 56 return 1;
nuclear@2 57 }
nuclear@2 58
nuclear@2 59 start_comp();
nuclear@2 60 reshape(root_width, root_height);
nuclear@2 61 redraw();
nuclear@1 62
nuclear@1 63 for(;;) {
nuclear@1 64 XEvent ev;
nuclear@1 65 XNextEvent(dpy, &ev);
nuclear@2 66
nuclear@3 67 CompWindow *cwin;
nuclear@2 68 switch(ev.type) {
nuclear@2 69 case CreateNotify:
nuclear@9 70 log_debug("CreateNotify: %x\n", ev.xcreatewindow.window);
nuclear@2 71 manage_window(ev.xcreatewindow.window);
nuclear@2 72 break;
nuclear@2 73
nuclear@2 74 case ConfigureNotify:
nuclear@14 75 if((cwin = find_window_xid(ev.xconfigure.window))) {
nuclear@13 76 cwin->attr.x = ev.xconfigure.x;
nuclear@13 77 cwin->attr.y = ev.xconfigure.y;
nuclear@13 78 cwin->attr.width = ev.xconfigure.width;
nuclear@13 79 cwin->attr.height = ev.xconfigure.height;
nuclear@12 80 cwin->update_attr();
nuclear@5 81 }
nuclear@2 82 break;
nuclear@2 83
nuclear@2 84 case DestroyNotify:
nuclear@9 85 log_debug("DestroyNotify: %x\n", ev.xdestroywindow.window);
nuclear@2 86 unmanage_window(ev.xdestroywindow.window);
nuclear@2 87 break;
nuclear@2 88
nuclear@2 89 case MapNotify:
nuclear@3 90 if((cwin = find_window_xid(ev.xmap.window))) {
nuclear@3 91 cwin->mapped = true;
nuclear@3 92 }
nuclear@2 93 break;
nuclear@3 94
nuclear@2 95 case UnmapNotify:
nuclear@3 96 if((cwin = find_window_xid(ev.xunmap.window))) {
nuclear@3 97 cwin->mapped = false;
nuclear@3 98 }
nuclear@2 99 break;
nuclear@2 100
nuclear@2 101 case ReparentNotify:
nuclear@2 102 if(ev.xreparent.parent == root_win) {
nuclear@2 103 manage_window(ev.xreparent.window);
nuclear@2 104 } else {
nuclear@2 105 unmanage_window(ev.xreparent.window);
nuclear@2 106 }
nuclear@2 107 break;
nuclear@2 108
nuclear@2 109 case CirculateNotify:
nuclear@2 110 break;
nuclear@2 111
nuclear@2 112 case Expose:
nuclear@3 113 // TODO?
nuclear@2 114 break;
nuclear@2 115
nuclear@2 116 default:
nuclear@2 117 if(ev.type == xdmg_ev_base + XDamageNotify) {
nuclear@7 118 damage_window((XDamageNotifyEvent*)&ev);
nuclear@2 119 }
nuclear@2 120 }
nuclear@5 121
nuclear@5 122 redraw();
nuclear@1 123 }
nuclear@1 124 }
nuclear@1 125
nuclear@5 126 static bool query_extensions()
nuclear@5 127 {
nuclear@5 128 int xcomp_ev_base, xcomp_err_base;
nuclear@5 129 if(!XCompositeQueryExtension(dpy, &xcomp_ev_base, &xcomp_err_base)) {
nuclear@5 130 log_error("X server doesn't support the composite extension\n");
nuclear@5 131 return false;
nuclear@5 132 }
nuclear@5 133 int xcomp_ver_major, xcomp_ver_minor;
nuclear@5 134 XCompositeQueryVersion(dpy, &xcomp_ver_major, &xcomp_ver_minor);
nuclear@5 135 log_info("Found composite extension version %d.%d\n", xcomp_ver_major, xcomp_ver_minor);
nuclear@5 136 if(xcomp_ver_major <= 0 && xcomp_ver_minor < 3) {
nuclear@5 137 // for NameWindowPixmap & CompositeGetoverlayWindow
nuclear@5 138 log_error("I need at least version 0.3\n");
nuclear@5 139 return false;
nuclear@5 140 }
nuclear@5 141
nuclear@5 142 if(!XDamageQueryExtension(dpy, &xdmg_ev_base, &xdmg_err_base)) {
nuclear@5 143 log_error("X server doesn't support the damage extension\n");
nuclear@5 144 return false;
nuclear@5 145 }
nuclear@5 146
nuclear@5 147 if(!XShapeQueryExtension(dpy, &xshape_ev_base, &xshape_err_base)) {
nuclear@5 148 log_error("X server doesn't support the shape extension\n");
nuclear@5 149 return false;
nuclear@5 150 }
nuclear@5 151
nuclear@5 152 int xfix_ev_base, xfix_err_base;
nuclear@5 153 if(!XFixesQueryExtension(dpy, &xfix_ev_base, &xfix_err_base)) {
nuclear@5 154 log_error("X server doesn't support the Xfixes extension\n");
nuclear@5 155 return false;
nuclear@5 156 }
nuclear@5 157
nuclear@5 158 int xfix_ver_major, xfix_ver_minor;
nuclear@5 159 XFixesQueryVersion(dpy, &xfix_ver_major, &xfix_ver_minor);
nuclear@5 160 log_info("Found xfixes version %d.%d\n", xfix_ver_major, xfix_ver_minor);
nuclear@5 161 if(xfix_ver_major < 2) {
nuclear@5 162 // for SetWindowShapeRegion
nuclear@5 163 log_error("I need at least version 2.0\n");
nuclear@5 164 return false;
nuclear@5 165 }
nuclear@5 166 return true;
nuclear@5 167 }
nuclear@5 168
nuclear@1 169 static bool register_compositor()
nuclear@1 170 {
nuclear@1 171 char atom_name[64];
nuclear@2 172 sprintf(atom_name, "_NET_WM_CM_S%d", screen_num);
nuclear@1 173 Atom xa_wm_cm = XInternAtom(dpy, atom_name, False);
nuclear@1 174
nuclear@1 175 Window win = XGetSelectionOwner(dpy, xa_wm_cm);
nuclear@1 176 if(win != None) {
nuclear@1 177 log_error("Another compositor is running. Stop it and try again.\n");
nuclear@1 178 return false;
nuclear@1 179 }
nuclear@1 180
nuclear@1 181 win = XCreateSimpleWindow(dpy, root_win, 0, 0, 1, 1, 0, None, None);
nuclear@1 182 XSetSelectionOwner(dpy, xa_wm_cm, win, 0);
nuclear@1 183 return true;
nuclear@1 184 }
nuclear@2 185
nuclear@2 186 static void start_comp()
nuclear@2 187 {
nuclear@2 188 XGrabServer(dpy);
nuclear@2 189 XCompositeRedirectSubwindows(dpy, root_win, CompositeRedirectManual);
nuclear@2 190 XSelectInput(dpy, root_win, SubstructureNotifyMask | ExposureMask | StructureNotifyMask);
nuclear@2 191
nuclear@2 192 // manage all top-level windows
nuclear@2 193 Window root_ret, parent;
nuclear@2 194 Window *children;
nuclear@2 195 unsigned int num_children;
nuclear@2 196 XQueryTree(dpy, root_win, &root_ret, &parent, &children, &num_children);
nuclear@2 197
nuclear@2 198 for(unsigned int i=0; i<num_children; i++) {
nuclear@2 199 manage_window(children[i]);
nuclear@2 200 }
nuclear@2 201 log_info("starting compositor, managing %u top-level windows\n", num_children);
nuclear@2 202 XFree(children);
nuclear@5 203 XUngrabServer(dpy);
nuclear@2 204
nuclear@5 205 /* set a zero-area input-shape for the overlay window to let events
nuclear@5 206 * through to the windows under it
nuclear@5 207 */
nuclear@5 208 XserverRegion region = XFixesCreateRegion(dpy, 0, 0);
nuclear@5 209 XFixesSetWindowShapeRegion(dpy, comp_win, ShapeInput, 0, 0, region);
nuclear@5 210 XFixesDestroyRegion(dpy, region);
nuclear@2 211 }
nuclear@2 212
nuclear@2 213 static void manage_window(Window xwin)
nuclear@2 214 {
nuclear@2 215 //log_debug("manage_window %u\n", xwin);
nuclear@2 216 CompWindow *cwin = new CompWindow(xwin);
nuclear@8 217 add_window(cwin);
nuclear@3 218 cwin->mapped = cwin->attr.map_state != IsUnmapped;
nuclear@2 219 }
nuclear@2 220
nuclear@2 221 static void unmanage_window(Window xwin)
nuclear@2 222 {
nuclear@2 223 //log_debug("unmanage_window %u\n", xwin);
nuclear@2 224 CompWindow *cwin = find_window_xid(xwin);
nuclear@3 225 if(!cwin) return;
nuclear@3 226
nuclear@3 227 remove_window(cwin);
nuclear@3 228 delete cwin;
nuclear@2 229 }
nuclear@2 230
nuclear@7 231 static void damage_window(XDamageNotifyEvent *ev)
nuclear@7 232 {
nuclear@7 233 XserverRegion region;
nuclear@7 234 CompWindow *cwin = find_window_xid(ev->drawable);
nuclear@9 235 if(!cwin || !cwin->damage) return;
nuclear@7 236
nuclear@7 237 region = XFixesCreateRegion(dpy, 0, 0);
nuclear@9 238
nuclear@9 239 push_xerr_handler(xerr_debug);
nuclear@7 240 XDamageSubtract(dpy, cwin->damage, None, region);
nuclear@9 241 pop_xerr_handler();
nuclear@11 242
nuclear@11 243 XFixesDestroyRegion(dpy, region);
nuclear@12 244 cwin->damaged = true;
nuclear@7 245 }
nuclear@7 246
nuclear@2 247 static void redraw()
nuclear@2 248 {
nuclear@2 249 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@2 250
nuclear@3 251 glPushAttrib(GL_ENABLE_BIT);
nuclear@3 252 glEnable(GL_TEXTURE_2D);
nuclear@2 253 glEnable(GL_BLEND);
nuclear@2 254 glBlendFunc(GL_ONE, GL_ONE);
nuclear@2 255
nuclear@2 256 int num_win = get_window_count();
nuclear@2 257 for(int i=0; i<num_win; i++) {
nuclear@2 258 CompWindow *cwin = get_window(i);
nuclear@2 259
nuclear@3 260 if(!cwin->mapped) continue;
nuclear@3 261
nuclear@3 262 if(cwin->attr.x + cwin->attr.width <= 0 ||
nuclear@3 263 cwin->attr.y + cwin->attr.height <= 0 ||
nuclear@3 264 cwin->attr.x >= root_width || cwin->attr.y >= root_height) {
nuclear@3 265 continue;
nuclear@3 266 }
nuclear@3 267
nuclear@3 268 draw_window(cwin);
nuclear@2 269 }
nuclear@2 270
nuclear@3 271 glPopAttrib();
nuclear@2 272
nuclear@2 273 glXSwapBuffers(dpy, comp_win);
nuclear@2 274 }
nuclear@2 275
nuclear@3 276 static void draw_window(CompWindow *cwin)
nuclear@3 277 {
nuclear@12 278 if(!cwin->xpixmap || !cwin->pixmap_valid) {
nuclear@12 279 cwin->update_pixmap();
nuclear@12 280 if(!cwin->tex_valid) {
nuclear@12 281 cwin->update_texture();
nuclear@3 282 }
nuclear@3 283 }
nuclear@3 284
nuclear@3 285 glBindTexture(GL_TEXTURE_2D, cwin->tex.get_id());
nuclear@3 286
nuclear@3 287 glBegin(GL_QUADS);
nuclear@3 288 glColor3f(0.3, 0.3, 0.3);
nuclear@3 289 glTexCoord2f(0, 0);
nuclear@3 290 glVertex2f(cwin->attr.x, cwin->attr.y);
nuclear@3 291 glTexCoord2f(1, 0);
nuclear@3 292 glVertex2f(cwin->attr.x + cwin->attr.width, cwin->attr.y);
nuclear@3 293 glTexCoord2f(1, 1);
nuclear@3 294 glVertex2f(cwin->attr.x + cwin->attr.width, cwin->attr.y + cwin->attr.height);
nuclear@3 295 glTexCoord2f(0, 1);
nuclear@3 296 glVertex2f(cwin->attr.x, cwin->attr.y + cwin->attr.height);
nuclear@3 297 glEnd();
nuclear@12 298
nuclear@12 299 cwin->damaged = false;
nuclear@3 300 }
nuclear@3 301
nuclear@2 302 static void reshape(int x, int y)
nuclear@2 303 {
nuclear@2 304 glViewport(0, 0, x, y);
nuclear@2 305
nuclear@2 306 glMatrixMode(GL_PROJECTION);
nuclear@2 307 glLoadIdentity();
nuclear@2 308 glOrtho(0, x, y, 0, -1, 1);
nuclear@2 309 }