forked from goliath/shadermeh
Cleanup window handling a little bit
Signed-off-by: David Oberhollenzer <goliath@infraroot.at>
This commit is contained in:
parent
75baf054e5
commit
319b283868
2 changed files with 118 additions and 71 deletions
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@ -22,6 +22,7 @@
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typedef struct {
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Window wnd;
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GLXContext gl;
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bool visible;
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} window;
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window *window_create(unsigned int width, unsigned int height,
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@ -35,7 +36,7 @@ void window_set_vsync(window *wnd, int enable);
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void window_destroy(window *wnd);
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int window_handle_events(void);
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bool window_handle_events(void);
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GLuint shader_program_load(const char *fsh);
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186
window.c
186
window.c
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@ -18,13 +18,16 @@ typedef GLXContext (*CREATECONTEXTATTRIBSPROC)(Display *, GLXFBConfig,
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typedef void (*SWAPINTERVALEXTPROC)(Display *, GLXDrawable, int);
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static int glversions[][2] = { {4,5}, {4,4}, {4,3}, {4,2}, {4,1}, {4,0},
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static int glversions[][2] = { {4,6}, {4,5}, {4,4}, {4,3}, {4,2}, {4,1}, {4,0},
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{3,3}, {3,2}, {3,1}, {3,0} };
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static Display *dpy;
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static int dpy_ref = 0;
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static Atom atom_wm_delete;
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static XContext xctx;
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static struct {
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Display *dpy;
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Atom atom_wm_delete;
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XContext xctx;
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size_t vis_wnd_count;
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size_t refcount;
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} x11_globals;
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static int xlib_swallow_errors(Display *display, XErrorEvent *event)
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{
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@ -32,6 +35,36 @@ static int xlib_swallow_errors(Display *display, XErrorEvent *event)
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return 0;
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}
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static int xlib_grab_ref(void)
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{
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if (x11_globals.refcount == 0) {
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x11_globals.dpy = XOpenDisplay(0);
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if (!x11_globals.dpy)
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return -1;
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XSetErrorHandler(xlib_swallow_errors);
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x11_globals.atom_wm_delete = XInternAtom(x11_globals.dpy,
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"WM_DELETE_WINDOW",
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True);
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x11_globals.xctx = XUniqueContext();
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}
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x11_globals.refcount += 1;
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return 0;
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}
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static void xlib_drop_ref(void)
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{
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x11_globals.refcount -= 1;
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if (x11_globals.refcount == 0) {
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XCloseDisplay(x11_globals.dpy);
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memset(&x11_globals, 0, sizeof(x11_globals));
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}
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}
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/****************************************************************************/
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window *window_create(unsigned int width, unsigned int height,
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@ -46,38 +79,26 @@ window *window_create(unsigned int width, unsigned int height,
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XVisualInfo *vi;
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window *this;
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this = calloc(1, sizeof(*this));
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if (!this)
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if (xlib_grab_ref())
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return NULL;
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if (dpy) {
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++dpy_ref;
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} else {
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dpy = XOpenDisplay(0);
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dpy_ref = 1;
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if (!dpy) {
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free(this);
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return NULL;
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}
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XSetErrorHandler(xlib_swallow_errors);
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atom_wm_delete = XInternAtom(dpy, "WM_DELETE_WINDOW", True);
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xctx = XUniqueContext();
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this = calloc(1, sizeof(*this));
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if (!this) {
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xlib_drop_ref();
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return NULL;
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}
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/* get a valid GLX framebuffer configuration; create an X11 visual */
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attr[ 0] = GLX_BUFFER_SIZE; attr[ 1] = 32;
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attr[ 2] = GLX_RED_SIZE; attr[ 3] = 8;
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attr[ 4] = GLX_GREEN_SIZE; attr[ 5] = 8;
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attr[ 6] = GLX_BLUE_SIZE; attr[ 7] = 8;
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attr[ 8] = GLX_ALPHA_SIZE; attr[ 9] = 8;
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attr[10] = GLX_DEPTH_SIZE; attr[11] = 24;
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attr[12] = GLX_STENCIL_SIZE; attr[13] = 8;
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attr[14] = GLX_DOUBLEBUFFER; attr[15] = True;
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attr[16] = None;
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attr[10] = GLX_DOUBLEBUFFER; attr[11] = True;
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attr[12] = None;
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fbl = glXChooseFBConfig(dpy, DefaultScreen(dpy), attr, &fbcount);
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fbl = glXChooseFBConfig(x11_globals.dpy, DefaultScreen(x11_globals.dpy),
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attr, &fbcount);
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if (!fbl || !fbcount) {
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window_destroy(this);
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@ -85,7 +106,7 @@ window *window_create(unsigned int width, unsigned int height,
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}
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fbc = fbl[0];
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vi = glXGetVisualFromFBConfig(dpy, fbl[0]);
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vi = glXGetVisualFromFBConfig(x11_globals.dpy, fbl[0]);
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XFree(fbl);
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if (!vi) {
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@ -93,9 +114,10 @@ window *window_create(unsigned int width, unsigned int height,
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return NULL;
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}
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swa.colormap = XCreateColormap(dpy, RootWindow(dpy,vi->screen),
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/* Get a colormap ID from the visual. Needed for legacy reasons. */
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swa.colormap = XCreateColormap(x11_globals.dpy,
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RootWindow(x11_globals.dpy, vi->screen),
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vi->visual, AllocNone);
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if (!swa.colormap) {
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XFree(vi);
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window_destroy(this);
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@ -104,9 +126,11 @@ window *window_create(unsigned int width, unsigned int height,
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swa.border_pixel = 0;
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this->wnd = XCreateWindow(dpy, RootWindow(dpy,vi->screen), 0, 0,
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/* create a window, and get rid of the X11 visual */
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this->wnd = XCreateWindow(x11_globals.dpy,
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RootWindow(x11_globals.dpy, vi->screen), 0, 0,
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width, height, 0, vi->depth, InputOutput,
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vi->visual, CWBorderPixel|CWColormap, &swa);
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vi->visual, CWBorderPixel | CWColormap, &swa);
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XFree(vi);
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if (!this->wnd) {
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@ -114,6 +138,7 @@ window *window_create(unsigned int width, unsigned int height,
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return NULL;
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}
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/* try to create a GLX context, the new modern way */
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CreateContextAttribs = (CREATECONTEXTATTRIBSPROC)
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glXGetProcAddress((const GLubyte*)"glXCreateContextAttribsARB");
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@ -133,14 +158,15 @@ window *window_create(unsigned int width, unsigned int height,
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attr[1] = glversions[i][0];
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attr[3] = glversions[i][1];
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this->gl = CreateContextAttribs(dpy, fbc, 0,
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this->gl = CreateContextAttribs(x11_globals.dpy, fbc, 0,
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True, attr);
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}
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}
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/* fallback: create a GLX context, the legacy way */
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if (!this->gl) {
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this->gl = glXCreateNewContext(dpy, fbc, GLX_RGBA_TYPE,
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0, GL_TRUE);
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this->gl = glXCreateNewContext(x11_globals.dpy, fbc,
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GLX_RGBA_TYPE, 0, GL_TRUE);
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}
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if (!this->gl) {
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@ -148,38 +174,51 @@ window *window_create(unsigned int width, unsigned int height,
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return NULL;
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}
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/* make the window non-resizable */
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hints.flags = PSize | PMinSize | PMaxSize;
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hints.min_width = hints.max_width = hints.base_width = width;
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hints.min_height = hints.max_height = hints.base_height = height;
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XSetWMNormalHints(dpy, this->wnd, &hints);
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XSetWMNormalHints(x11_globals.dpy, this->wnd, &hints);
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XSelectInput(dpy, this->wnd, StructureNotifyMask |
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/* X11 should tell us about pretty much everything */
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XSelectInput(x11_globals.dpy, this->wnd, StructureNotifyMask |
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KeyPressMask | KeyReleaseMask |
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PointerMotionMask | PropertyChangeMask |
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ButtonPressMask | ButtonReleaseMask);
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XSetWMProtocols(dpy, this->wnd, &atom_wm_delete, 1);
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XFlush(dpy);
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XSetWMProtocols(x11_globals.dpy, this->wnd,
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&x11_globals.atom_wm_delete, 1);
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XStoreName(dpy, this->wnd, caption);
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XMapWindow(dpy, this->wnd);
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XSaveContext(dpy, this->wnd, xctx, (XPointer)this);
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XFlush(dpy);
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/* store the object pointer with the window,
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so we can get it back later */
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XSaveContext(x11_globals.dpy, this->wnd,
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x11_globals.xctx, (XPointer)this);
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/* set the caption and make the window visible */
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XStoreName(x11_globals.dpy, this->wnd, caption);
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XMapWindow(x11_globals.dpy, this->wnd);
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this->visible = true;
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x11_globals.vis_wnd_count += 1;
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/* flush any pending requests to the X Server */
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XFlush(x11_globals.dpy);
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return this;
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}
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void window_make_current(window *this)
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{
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if (this) {
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glXMakeContextCurrent(dpy, this->wnd, this->wnd, this->gl);
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glXMakeContextCurrent(x11_globals.dpy, this->wnd,
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this->wnd, this->gl);
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} else {
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glXMakeContextCurrent(dpy, 0, 0, 0);
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glXMakeContextCurrent(x11_globals.dpy, 0, 0, 0);
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}
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}
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void window_swap_buffers(window *this)
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{
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glXSwapBuffers(dpy, this->wnd);
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glXSwapBuffers(x11_globals.dpy, this->wnd);
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}
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void window_set_vsync(window *this, int enable)
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@ -190,48 +229,55 @@ void window_set_vsync(window *this, int enable)
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glXGetProcAddress((const GLubyte *)"glXSwapIntervalEXT");
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if (SwapIntervalEXT)
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SwapIntervalEXT(dpy, this->wnd, enable ? 1 : 0);
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SwapIntervalEXT(x11_globals.dpy, this->wnd, enable ? 1 : 0);
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}
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void window_destroy(window *this)
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{
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if (this->gl) {
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glXMakeContextCurrent(dpy, 0, 0, 0);
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glXDestroyContext(dpy, this->gl);
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glXMakeContextCurrent(x11_globals.dpy, 0, 0, 0);
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glXDestroyContext(x11_globals.dpy, this->gl);
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}
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if (this->wnd) {
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XDeleteContext(dpy, this->wnd, xctx);
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XDestroyWindow(dpy, this->wnd);
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XDeleteContext(x11_globals.dpy, this->wnd, x11_globals.xctx);
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XDestroyWindow(x11_globals.dpy, this->wnd);
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}
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if ((--dpy_ref) <= 0) {
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XCloseDisplay(dpy);
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dpy_ref = 0;
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dpy = NULL;
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}
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if (this->visible)
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x11_globals.vis_wnd_count -= 1;
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xlib_drop_ref();
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free(this);
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}
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int window_handle_events(void)
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bool window_handle_events(void)
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{
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window *this;
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window *wnd;
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XEvent e;
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if (XPending(dpy)) {
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XNextEvent(dpy, &e);
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XFindContext(dpy, e.xany.window, xctx, (XPointer *)&this);
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/* if there are no events, return to the drawing loop ASAP */
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if (!XPending(x11_globals.dpy))
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goto out;
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switch (e.type) {
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case ClientMessage:
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if (e.xclient.data.l[0] == (long)atom_wm_delete) {
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XUnmapWindow(dpy, e.xany.window);
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--dpy_ref;
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}
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break;
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/* get a window event, and get the coresponding object pointer */
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XNextEvent(x11_globals.dpy, &e);
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XFindContext(x11_globals.dpy, e.xany.window,
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x11_globals.xctx, (XPointer *)&wnd);
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if (!wnd)
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goto out;
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/* process event */
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switch (e.type) {
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case ClientMessage:
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if (e.xclient.data.l[0] == (long)x11_globals.atom_wm_delete) {
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XUnmapWindow(x11_globals.dpy, e.xany.window);
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wnd->visible = false;
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x11_globals.vis_wnd_count -= 1;
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}
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break;
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}
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return (dpy_ref > 0);
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out:
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return x11_globals.vis_wnd_count > 0;
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}
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