304 lines
12 KiB
C
304 lines
12 KiB
C
/*
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* MIT License
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*
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* Copyright (c) 2016-2017 Patrick Rudolph <siro@das-labor.org>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*
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* Based on x11/nuklear_xlib.h.
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*/
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/*
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* ==============================================================
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*
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* API
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*
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* ===============================================================
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*/
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#ifndef NK_XLIBSHM_H_
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#define NK_XLIBSHM_H_
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#include <X11/Xlib.h>
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NK_API int nk_xlib_init(Display *dpy, Visual *vis, int screen, Window root, unsigned int w, unsigned int h, void **fb, rawfb_pl *pl);
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NK_API int nk_xlib_handle_event(Display *dpy, int screen, Window win, XEvent *evt, struct rawfb_context *rawfb);
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NK_API void nk_xlib_render(Drawable screen);
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NK_API void nk_xlib_shutdown(void);
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#endif
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/*
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* ==============================================================
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*
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* IMPLEMENTATION
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*
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* ===============================================================
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*/
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#ifdef NK_XLIBSHM_IMPLEMENTATION
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <X11/Xresource.h>
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#include <X11/Xlocale.h>
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#include <X11/extensions/XShm.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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static struct {
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struct nk_context ctx;
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struct XSurface *surf;
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Cursor cursor;
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Display *dpy;
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Window root;
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XImage *ximg;
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XShmSegmentInfo xsi;
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char fallback;
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GC gc;
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} xlib;
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NK_API int
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nk_xlib_init(Display *dpy, Visual *vis, int screen, Window root,
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unsigned int w, unsigned int h, void **fb, rawfb_pl *pl)
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{
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unsigned int depth = XDefaultDepth(dpy, screen);
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xlib.dpy = dpy;
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xlib.root = root;
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if (!setlocale(LC_ALL,"")) return 0;
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if (!XSupportsLocale()) return 0;
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if (!XSetLocaleModifiers("@im=none")) return 0;
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/* create invisible cursor */
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{static XColor dummy; char data[1] = {0};
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Pixmap blank = XCreateBitmapFromData(dpy, root, data, 1, 1);
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if (blank == None) return 0;
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xlib.cursor = XCreatePixmapCursor(dpy, blank, blank, &dummy, &dummy, 0, 0);
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XFreePixmap(dpy, blank);}
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xlib.fallback = False;
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do {/* Initialize shared memory according to:
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* https://www.x.org/archive/X11R7.5/doc/Xext/mit-shm.html */
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int status;
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if (!XShmQueryExtension(dpy)) {
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printf("No XShm Extension available.\n");
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xlib.fallback = True;
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break;
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}
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xlib.ximg = XShmCreateImage(dpy, vis, depth, ZPixmap, NULL, &xlib.xsi, w, h);
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if (!xlib.ximg) {
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xlib.fallback = True;
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break;
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}
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xlib.xsi.shmid = shmget(IPC_PRIVATE, xlib.ximg->bytes_per_line * xlib.ximg->height, IPC_CREAT | 0777);
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if (xlib.xsi.shmid < 0) {
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XDestroyImage(xlib.ximg);
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xlib.fallback = True;
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break;
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}
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xlib.xsi.shmaddr = xlib.ximg->data = shmat(xlib.xsi.shmid, NULL, 0);
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if ((size_t)xlib.xsi.shmaddr < 0) {
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XDestroyImage(xlib.ximg);
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xlib.fallback = True;
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break;
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}
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xlib.xsi.readOnly = False;
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status = XShmAttach(dpy, &xlib.xsi);
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if (!status) {
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shmdt(xlib.xsi.shmaddr);
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XDestroyImage(xlib.ximg);
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xlib.fallback = True;
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break;
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} XSync(dpy, False);
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shmctl(xlib.xsi.shmid, IPC_RMID, NULL);
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} while(0);
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if (xlib.fallback) {
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xlib.ximg = XCreateImage(dpy, vis, depth, ZPixmap, 0, NULL, w, h, 32, 0);
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if (!xlib.ximg) return 0;
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xlib.ximg->data = malloc(h * xlib.ximg->bytes_per_line);
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if (!xlib.ximg->data)
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return 0;
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}
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xlib.gc = XDefaultGC(dpy, screen);
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*fb = xlib.ximg->data;
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if (xlib.ximg->red_mask == 0xff0000 &&
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xlib.ximg->green_mask == 0xff00 &&
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xlib.ximg->blue_mask == 0xff &&
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xlib.ximg->bits_per_pixel == 32) {
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*pl = PIXEL_LAYOUT_XRGB_8888;
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}
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else if (xlib.ximg->red_mask == 0xff000000 &&
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xlib.ximg->green_mask == 0xff0000 &&
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xlib.ximg->blue_mask == 0xff00 &&
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xlib.ximg->bits_per_pixel == 32) {
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*pl = PIXEL_LAYOUT_RGBX_8888;
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}
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else {
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perror("nk_xlib_init(): Unrecognized pixel layout.\n");
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return 0;
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}
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return 1;
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}
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NK_API int
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nk_xlib_handle_event(Display *dpy, int screen, Window win, XEvent *evt, struct rawfb_context *rawfb)
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{
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/* optional grabbing behavior */
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if (rawfb->ctx.input.mouse.grab) {
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/* XDefineCursor(xlib.dpy, xlib.root, xlib.cursor); */
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rawfb->ctx.input.mouse.grab = 0;
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} else if (rawfb->ctx.input.mouse.ungrab) {
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XWarpPointer(xlib.dpy, None, xlib.root, 0, 0, 0, 0,
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(int)rawfb->ctx.input.mouse.prev.x, (int)rawfb->ctx.input.mouse.prev.y);
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/* XUndefineCursor(xlib.dpy, xlib.root); */
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rawfb->ctx.input.mouse.ungrab = 0;
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}
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if (evt->type == KeyPress || evt->type == KeyRelease)
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{
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/* Key handler */
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int ret, down = (evt->type == KeyPress);
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KeySym *code = XGetKeyboardMapping(xlib.dpy, (KeyCode)evt->xkey.keycode, 1, &ret);
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if (*code == XK_Shift_L || *code == XK_Shift_R) nk_input_key(&rawfb->ctx, NK_KEY_SHIFT, down);
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else if (*code == XK_Control_L || *code == XK_Control_R) nk_input_key(&rawfb->ctx, NK_KEY_CTRL, down);
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else if (*code == XK_Delete) nk_input_key(&rawfb->ctx, NK_KEY_DEL, down);
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else if (*code == XK_Return) nk_input_key(&rawfb->ctx, NK_KEY_ENTER, down);
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else if (*code == XK_Tab) nk_input_key(&rawfb->ctx, NK_KEY_TAB, down);
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else if (*code == XK_Left) nk_input_key(&rawfb->ctx, NK_KEY_LEFT, down);
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else if (*code == XK_Right) nk_input_key(&rawfb->ctx, NK_KEY_RIGHT, down);
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else if (*code == XK_Up) nk_input_key(&rawfb->ctx, NK_KEY_UP, down);
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else if (*code == XK_Down) nk_input_key(&rawfb->ctx, NK_KEY_DOWN, down);
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else if (*code == XK_BackSpace) nk_input_key(&rawfb->ctx, NK_KEY_BACKSPACE, down);
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else if (*code == XK_Escape) nk_input_key(&rawfb->ctx, NK_KEY_TEXT_RESET_MODE, down);
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else if (*code == XK_Page_Up) nk_input_key(&rawfb->ctx, NK_KEY_SCROLL_UP, down);
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else if (*code == XK_Page_Down) nk_input_key(&rawfb->ctx, NK_KEY_SCROLL_DOWN, down);
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else if (*code == XK_Home) {
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nk_input_key(&rawfb->ctx, NK_KEY_TEXT_START, down);
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nk_input_key(&rawfb->ctx, NK_KEY_SCROLL_START, down);
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} else if (*code == XK_End) {
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nk_input_key(&rawfb->ctx, NK_KEY_TEXT_END, down);
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nk_input_key(&rawfb->ctx, NK_KEY_SCROLL_END, down);
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} else {
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if (*code == 'c' && (evt->xkey.state & ControlMask))
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nk_input_key(&rawfb->ctx, NK_KEY_COPY, down);
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else if (*code == 'v' && (evt->xkey.state & ControlMask))
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nk_input_key(&rawfb->ctx, NK_KEY_PASTE, down);
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else if (*code == 'x' && (evt->xkey.state & ControlMask))
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nk_input_key(&rawfb->ctx, NK_KEY_CUT, down);
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else if (*code == 'z' && (evt->xkey.state & ControlMask))
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nk_input_key(&rawfb->ctx, NK_KEY_TEXT_UNDO, down);
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else if (*code == 'r' && (evt->xkey.state & ControlMask))
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nk_input_key(&rawfb->ctx, NK_KEY_TEXT_REDO, down);
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else if (*code == XK_Left && (evt->xkey.state & ControlMask))
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nk_input_key(&rawfb->ctx, NK_KEY_TEXT_WORD_LEFT, down);
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else if (*code == XK_Right && (evt->xkey.state & ControlMask))
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nk_input_key(&rawfb->ctx, NK_KEY_TEXT_WORD_RIGHT, down);
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else if (*code == 'b' && (evt->xkey.state & ControlMask))
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nk_input_key(&rawfb->ctx, NK_KEY_TEXT_LINE_START, down);
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else if (*code == 'e' && (evt->xkey.state & ControlMask))
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nk_input_key(&rawfb->ctx, NK_KEY_TEXT_LINE_END, down);
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else {
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if (*code == 'i')
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nk_input_key(&rawfb->ctx, NK_KEY_TEXT_INSERT_MODE, down);
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else if (*code == 'r')
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nk_input_key(&rawfb->ctx, NK_KEY_TEXT_REPLACE_MODE, down);
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if (down) {
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char buf[32];
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KeySym keysym = 0;
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if (XLookupString((XKeyEvent*)evt, buf, 32, &keysym, NULL) != NoSymbol)
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nk_input_glyph(&rawfb->ctx, buf);
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}
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}
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} XFree(code);
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return 1;
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} else if (evt->type == ButtonPress || evt->type == ButtonRelease) {
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/* Button handler */
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int down = (evt->type == ButtonPress);
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const int x = evt->xbutton.x, y = evt->xbutton.y;
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if (evt->xbutton.button == Button1)
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nk_input_button(&rawfb->ctx, NK_BUTTON_LEFT, x, y, down);
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if (evt->xbutton.button == Button2)
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nk_input_button(&rawfb->ctx, NK_BUTTON_MIDDLE, x, y, down);
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else if (evt->xbutton.button == Button3)
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nk_input_button(&rawfb->ctx, NK_BUTTON_RIGHT, x, y, down);
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else if (evt->xbutton.button == Button4)
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nk_input_scroll(&rawfb->ctx, nk_vec2(0, 1.0f));
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else if (evt->xbutton.button == Button5)
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nk_input_scroll(&rawfb->ctx, nk_vec2(0, -1.0f));
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else return 0;
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return 1;
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} else if (evt->type == MotionNotify) {
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/* Mouse motion handler */
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const int x = evt->xmotion.x, y = evt->xmotion.y;
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nk_input_motion(&rawfb->ctx, x, y);
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if (rawfb->ctx.input.mouse.grabbed) {
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rawfb->ctx.input.mouse.pos.x = rawfb->ctx.input.mouse.prev.x;
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rawfb->ctx.input.mouse.pos.y = rawfb->ctx.input.mouse.prev.y;
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XWarpPointer(xlib.dpy, None, xlib.root, 0, 0, 0, 0, (int)rawfb->ctx.input.mouse.pos.x, (int)rawfb->ctx.input.mouse.pos.y);
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} return 1;
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} else if (evt->type == Expose || evt->type == ConfigureNotify) {
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/* Window resize handler */
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void *fb;
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unsigned int width, height;
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XWindowAttributes attr;
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XGetWindowAttributes(dpy, win, &attr);
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rawfb_pl pl;
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width = (unsigned int)attr.width;
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height = (unsigned int)attr.height;
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nk_xlib_shutdown();
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nk_xlib_init(dpy, XDefaultVisual(dpy, screen), screen, win, width, height, &fb, &pl);
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nk_rawfb_resize_fb(rawfb, fb, width, height, width * 4, pl);
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} else if (evt->type == KeymapNotify) {
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XRefreshKeyboardMapping(&evt->xmapping);
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return 1;
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} else if (evt->type == LeaveNotify) {
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XUndefineCursor(xlib.dpy, xlib.root);
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} else if (evt->type == EnterNotify) {
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XDefineCursor(xlib.dpy, xlib.root, xlib.cursor);
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} return 0;
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}
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NK_API void
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nk_xlib_shutdown(void)
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{
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XFreeCursor(xlib.dpy, xlib.cursor);
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if (xlib.fallback) {
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free(xlib.ximg->data);
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XDestroyImage(xlib.ximg);
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} else {
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XShmDetach(xlib.dpy, &xlib.xsi);
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XDestroyImage(xlib.ximg);
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shmdt(xlib.xsi.shmaddr);
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shmctl(xlib.xsi.shmid, IPC_RMID, NULL);
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} NK_MEMSET(&xlib, 0, sizeof(xlib));
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}
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NK_API void
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nk_xlib_render(Drawable screen)
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{
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if (xlib.fallback)
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XPutImage(xlib.dpy, screen, xlib.gc, xlib.ximg,
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0, 0, 0, 0, xlib.ximg->width, xlib.ximg->height);
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else XShmPutImage(xlib.dpy, screen, xlib.gc, xlib.ximg,
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0, 0, 0, 0, xlib.ximg->width, xlib.ximg->height, False);
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}
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#endif
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