xglcomp

annotate src/main.cc @ 3:e831d38e6faa

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textures
author John Tsiombikas <nuclear@member.fsf.org>
date Fri, 22 Jan 2016 07:46:47 +0200
parents 876efea9424c
children 86e57e56a454
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@0 9 #include "cwin.h"
nuclear@2 10 #include "opengl.h"
nuclear@1 11 #include "logger.h"
nuclear@1 12
nuclear@1 13 static bool register_compositor();
nuclear@2 14 static void start_comp();
nuclear@2 15 static void manage_window(Window xwin);
nuclear@2 16 static void unmanage_window(Window xwin);
nuclear@2 17 static void redraw();
nuclear@3 18 static void draw_window(CompWindow *cwin);
nuclear@2 19 static void reshape(int x, int y);
nuclear@1 20
nuclear@2 21 Display *dpy;
nuclear@2 22 int screen_num;
nuclear@2 23 Window root_win, comp_win;
nuclear@2 24 int root_width, root_height;
nuclear@1 25
nuclear@1 26 int main(int argc, char **argv)
nuclear@1 27 {
nuclear@1 28 if(!(dpy = XOpenDisplay(0))) {
nuclear@1 29 log_error("failed to open X display\n");
nuclear@1 30 return 1;
nuclear@1 31 }
nuclear@2 32 screen_num = DefaultScreen(dpy);
nuclear@2 33 root_win = RootWindow(dpy, screen_num);
nuclear@2 34 root_width = DisplayWidth(dpy, screen_num);
nuclear@2 35 root_height = DisplayHeight(dpy, screen_num);
nuclear@1 36 log_info("display size %dx%d\n", root_width, root_height);
nuclear@1 37
nuclear@2 38 int xcomp_ev_base, xcomp_err_base;
nuclear@1 39 if(!XCompositeQueryExtension(dpy, &xcomp_ev_base, &xcomp_err_base)) {
nuclear@1 40 log_error("X server doesn't support the composite extension\n");
nuclear@1 41 return 1;
nuclear@1 42 }
nuclear@2 43 int xcomp_ver_major = 0, xcomp_ver_minor = 4;
nuclear@1 44 XCompositeQueryVersion(dpy, &xcomp_ver_major, &xcomp_ver_minor);
nuclear@1 45 log_info("Found composite extension version %d.%d\n", xcomp_ver_major, xcomp_ver_minor);
nuclear@2 46 if(xcomp_ver_major <= 0 && xcomp_ver_minor < 3) {
nuclear@2 47 // for NameWindowPixmap & CompositeGetoverlayWindow
nuclear@2 48 log_error("I need at least version 0.3\n");
nuclear@1 49 return 1;
nuclear@1 50 }
nuclear@1 51
nuclear@1 52 int xdmg_ev_base, xdmg_err_base;
nuclear@1 53 if(!XDamageQueryExtension(dpy, &xdmg_ev_base, &xdmg_err_base)) {
nuclear@1 54 log_error("X server doesn't support the damage extension\n");
nuclear@1 55 return 1;
nuclear@1 56 }
nuclear@1 57 // TODO also XFixes ?
nuclear@1 58
nuclear@1 59 if(!register_compositor()) {
nuclear@1 60 return 1;
nuclear@1 61 }
nuclear@1 62
nuclear@2 63 comp_win = XCompositeGetOverlayWindow(dpy, root_win);
nuclear@2 64 if(!create_gl(comp_win)) {
nuclear@2 65 return 1;
nuclear@2 66 }
nuclear@2 67
nuclear@2 68 start_comp();
nuclear@2 69 reshape(root_width, root_height);
nuclear@2 70 redraw();
nuclear@1 71
nuclear@1 72 for(;;) {
nuclear@1 73 XEvent ev;
nuclear@1 74 XNextEvent(dpy, &ev);
nuclear@2 75
nuclear@3 76 CompWindow *cwin;
nuclear@2 77 switch(ev.type) {
nuclear@2 78 case CreateNotify:
nuclear@2 79 manage_window(ev.xcreatewindow.window);
nuclear@2 80 break;
nuclear@2 81
nuclear@2 82 case ConfigureNotify:
nuclear@2 83 break;
nuclear@2 84
nuclear@2 85 case DestroyNotify:
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@2 118 }
nuclear@2 119 }
nuclear@1 120 }
nuclear@1 121 }
nuclear@1 122
nuclear@1 123 static bool register_compositor()
nuclear@1 124 {
nuclear@1 125 char atom_name[64];
nuclear@2 126 sprintf(atom_name, "_NET_WM_CM_S%d", screen_num);
nuclear@1 127 Atom xa_wm_cm = XInternAtom(dpy, atom_name, False);
nuclear@1 128
nuclear@1 129 Window win = XGetSelectionOwner(dpy, xa_wm_cm);
nuclear@1 130 if(win != None) {
nuclear@1 131 log_error("Another compositor is running. Stop it and try again.\n");
nuclear@1 132 return false;
nuclear@1 133 }
nuclear@1 134
nuclear@1 135 win = XCreateSimpleWindow(dpy, root_win, 0, 0, 1, 1, 0, None, None);
nuclear@1 136 XSetSelectionOwner(dpy, xa_wm_cm, win, 0);
nuclear@1 137 return true;
nuclear@1 138 }
nuclear@2 139
nuclear@2 140 static void start_comp()
nuclear@2 141 {
nuclear@2 142 XGrabServer(dpy);
nuclear@2 143 XCompositeRedirectSubwindows(dpy, root_win, CompositeRedirectManual);
nuclear@2 144 XSelectInput(dpy, root_win, SubstructureNotifyMask | ExposureMask | StructureNotifyMask);
nuclear@2 145
nuclear@2 146 // manage all top-level windows
nuclear@2 147 Window root_ret, parent;
nuclear@2 148 Window *children;
nuclear@2 149 unsigned int num_children;
nuclear@2 150 XQueryTree(dpy, root_win, &root_ret, &parent, &children, &num_children);
nuclear@2 151
nuclear@2 152 for(unsigned int i=0; i<num_children; i++) {
nuclear@2 153 manage_window(children[i]);
nuclear@2 154 }
nuclear@2 155 log_info("starting compositor, managing %u top-level windows\n", num_children);
nuclear@2 156 XFree(children);
nuclear@2 157
nuclear@2 158 XUngrabServer(dpy);
nuclear@2 159 }
nuclear@2 160
nuclear@2 161 static void manage_window(Window xwin)
nuclear@2 162 {
nuclear@2 163 //log_debug("manage_window %u\n", xwin);
nuclear@2 164 CompWindow *cwin = new CompWindow(xwin);
nuclear@2 165 XGetWindowAttributes(dpy, xwin, &cwin->attr);
nuclear@3 166 cwin->mapped = cwin->attr.map_state != IsUnmapped;
nuclear@2 167 add_window(cwin);
nuclear@2 168 }
nuclear@2 169
nuclear@2 170 static void unmanage_window(Window xwin)
nuclear@2 171 {
nuclear@2 172 //log_debug("unmanage_window %u\n", xwin);
nuclear@2 173 CompWindow *cwin = find_window_xid(xwin);
nuclear@3 174 if(!cwin) return;
nuclear@3 175
nuclear@3 176 if(cwin->xpixmap) {
nuclear@3 177 XFreePixmap(dpy, cwin->xpixmap);
nuclear@2 178 }
nuclear@3 179
nuclear@3 180 remove_window(cwin);
nuclear@3 181 delete cwin;
nuclear@2 182 }
nuclear@2 183
nuclear@2 184 static void redraw()
nuclear@2 185 {
nuclear@2 186 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
nuclear@2 187
nuclear@3 188 glPushAttrib(GL_ENABLE_BIT);
nuclear@3 189 glEnable(GL_TEXTURE_2D);
nuclear@2 190 glEnable(GL_BLEND);
nuclear@2 191 glBlendFunc(GL_ONE, GL_ONE);
nuclear@2 192
nuclear@2 193 int num_win = get_window_count();
nuclear@2 194 for(int i=0; i<num_win; i++) {
nuclear@2 195 CompWindow *cwin = get_window(i);
nuclear@2 196
nuclear@3 197 if(!cwin->mapped) continue;
nuclear@3 198
nuclear@3 199 if(cwin->attr.x + cwin->attr.width <= 0 ||
nuclear@3 200 cwin->attr.y + cwin->attr.height <= 0 ||
nuclear@3 201 cwin->attr.x >= root_width || cwin->attr.y >= root_height) {
nuclear@3 202 continue;
nuclear@3 203 }
nuclear@3 204
nuclear@3 205 draw_window(cwin);
nuclear@2 206 }
nuclear@2 207
nuclear@3 208 glPopAttrib();
nuclear@2 209
nuclear@2 210 glXSwapBuffers(dpy, comp_win);
nuclear@2 211 }
nuclear@2 212
nuclear@3 213 static void draw_window(CompWindow *cwin)
nuclear@3 214 {
nuclear@3 215 if(!cwin->xpixmap) {
nuclear@3 216 cwin->xpixmap = XCompositeNameWindowPixmap(dpy, cwin->xwin);
nuclear@3 217 if(!cwin->xpixmap) {
nuclear@3 218 log_warning("failed to get pixmap\n");
nuclear@3 219 return;
nuclear@3 220 }
nuclear@3 221 cwin->tex.set_image(dpy, cwin->xpixmap);
nuclear@3 222 }
nuclear@3 223
nuclear@3 224 glBindTexture(GL_TEXTURE_2D, cwin->tex.get_id());
nuclear@3 225
nuclear@3 226 glBegin(GL_QUADS);
nuclear@3 227 glColor3f(0.3, 0.3, 0.3);
nuclear@3 228 glTexCoord2f(0, 0);
nuclear@3 229 glVertex2f(cwin->attr.x, cwin->attr.y);
nuclear@3 230 glTexCoord2f(1, 0);
nuclear@3 231 glVertex2f(cwin->attr.x + cwin->attr.width, cwin->attr.y);
nuclear@3 232 glTexCoord2f(1, 1);
nuclear@3 233 glVertex2f(cwin->attr.x + cwin->attr.width, cwin->attr.y + cwin->attr.height);
nuclear@3 234 glTexCoord2f(0, 1);
nuclear@3 235 glVertex2f(cwin->attr.x, cwin->attr.y + cwin->attr.height);
nuclear@3 236 glEnd();
nuclear@3 237 }
nuclear@3 238
nuclear@2 239 static void reshape(int x, int y)
nuclear@2 240 {
nuclear@2 241 glViewport(0, 0, x, y);
nuclear@2 242
nuclear@2 243 glMatrixMode(GL_PROJECTION);
nuclear@2 244 glLoadIdentity();
nuclear@2 245 glOrtho(0, x, y, 0, -1, 1);
nuclear@2 246 }