x: Add region related helper functions
Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
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2
Makefile
2
Makefile
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@ -9,7 +9,7 @@ MANDIR ?= $(PREFIX)/share/man/man1
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APPDIR ?= $(PREFIX)/share/applications
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ICODIR ?= $(PREFIX)/share/icons/hicolor/
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PACKAGES = x11 x11-xcb xcb-renderutil xcb-render xcb-damage xcb-randr xcb-composite xcb-shape xcb-image xcb-xfixes xfixes xext
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PACKAGES = x11 x11-xcb xcb-renderutil xcb-render xcb-damage xcb-randr xcb-composite xcb-shape xcb-image xcb-xfixes xfixes xext pixman-1
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LIBS = -lm -lrt
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INCS =
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@ -0,0 +1,25 @@
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#pragma once
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#include <pixman.h>
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#include <stdio.h>
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#include "utils.h"
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typedef struct pixman_region32 pixman_region32_t;
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typedef struct pixman_box32 pixman_box32_t;
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typedef pixman_region32_t region_t;
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typedef pixman_box32_t rect_t;
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RC_TYPE(region_t, rc_region, pixman_region32_init, pixman_region32_fini, static inline)
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/// copy a region_t
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static inline void
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copy_region_(region_t *dst, const region_t *p) {
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pixman_region32_copy(dst, (region_t *)p);
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}
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static inline void
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dump_region_(const region_t *x) {
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int nrects;
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const rect_t *rects = pixman_region32_rectangles((region_t *)x, &nrects);
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fprintf(stderr, "nrects: %d\n", nrects);
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for (int i = 0; i < nrects; i++)
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fprintf(stderr, "(%d, %d) - (%d, %d)\n", rects[i].x1, rects[i].y1, rects[i].x2, rects[i].y2);
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}
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53
src/x.c
53
src/x.c
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@ -2,6 +2,8 @@
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#include <X11/Xlib.h>
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#include <xcb/xcb_renderutil.h>
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#include <xcb/xfixes.h>
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#include <pixman.h>
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#include "common.h"
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#include "x.h"
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@ -208,3 +210,54 @@ x_create_picture(session_t *ps, int wid, int hei,
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return picture;
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}
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bool x_fetch_region(session_t *ps, XserverRegion r, pixman_region32_t *res) {
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xcb_generic_error_t *e = NULL;
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xcb_connection_t *c = XGetXCBConnection(ps->dpy);
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xcb_xfixes_fetch_region_reply_t *xr = xcb_xfixes_fetch_region_reply(c,
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xcb_xfixes_fetch_region(c, r), &e);
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if (!xr) {
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printf_errf("(): failed to fetch rectangles");
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return false;
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}
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int nrect = xcb_xfixes_fetch_region_rectangles_length(xr);
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pixman_box32_t *b = calloc(nrect, sizeof *b);
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xcb_rectangle_t *xrect = xcb_xfixes_fetch_region_rectangles(xr);
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for (int i = 0; i < nrect; i++) {
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b[i] = (pixman_box32_t) {
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.x1 = xrect[i].x,
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.y1 = xrect[i].y,
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.x2 = xrect[i].x + xrect[i].width,
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.y2 = xrect[i].y + xrect[i].height
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};
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}
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bool ret = pixman_region32_init_rects(res, b, nrect);
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free(b);
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free(xr);
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return ret;
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}
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void x_set_picture_clip_region(session_t *ps, xcb_render_picture_t pict,
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int clip_x_origin, int clip_y_origin, const region_t *reg) {
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int nrects;
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const rect_t *rects = pixman_region32_rectangles((region_t *)reg, &nrects);
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xcb_rectangle_t *xrects = calloc(nrects, sizeof *xrects);
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for (int i = 0; i < nrects; i++)
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xrects[i] = (xcb_rectangle_t){
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.x = rects[i].x1,
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.y = rects[i].y1,
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.width = rects[i].x2 - rects[i].x1,
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.height = rects[i].y2 - rects[i].y1,
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};
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xcb_connection_t *c = XGetXCBConnection(ps->dpy);
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xcb_generic_error_t *e =
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xcb_request_check(c, xcb_render_set_picture_clip_rectangles_checked(c, pict,
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clip_x_origin, clip_y_origin, nrects, xrects));
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if (e)
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printf_errf("(): failed to set clip region");
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free(e);
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free(xrects);
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return;
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}
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10
src/x.h
10
src/x.h
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@ -4,8 +4,12 @@
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#include <xcb/xcb.h>
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#include <xcb/render.h>
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#include <xcb/xcb_renderutil.h>
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#include "region.h"
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typedef struct session session_t;
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typedef struct winprop winprop_t;
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/**
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* Get a specific attribute of a window.
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*
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@ -66,3 +70,9 @@ xcb_render_picture_t
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x_create_picture(session_t *ps, int wid, int hei,
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xcb_render_pictforminfo_t *pictfmt, unsigned long valuemask,
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const xcb_render_create_picture_value_list_t *attr);
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/// Fetch a X region and store it in a pixman region
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bool x_fetch_region(session_t *ps, XserverRegion r, region_t *res);
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void x_set_picture_clip_region(session_t *ps, xcb_render_picture_t,
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int clip_x_origin, int clip_y_origin, const region_t *);
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