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https://gitlab.freedesktop.org/wayland/weston
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![Bryce Harrington](/assets/img/avatar_default.png)
Direct fail_on_null calls now produce output like: [weston-info] clients/weston-info.c:714: out of memory xmalloc, et al produce output on failure like: [weston-info] out of memory (-1) Signed-off-by: Bryce Harrington <bryce@osg.samsung.com> Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
364 lines
8.9 KiB
C
364 lines
8.9 KiB
C
/*
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* Copyright © 2010 Intel Corporation
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* Copyright © 2012 Collabora, Ltd.
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* Copyright © 2012 Jonas Ådahl
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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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
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* THE 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
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "config.h"
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <cairo.h>
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#include <math.h>
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#include <assert.h>
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#include <sys/timerfd.h>
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#include <sys/epoll.h>
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#include <unistd.h>
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#include <linux/input.h>
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#include <wayland-client.h>
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#include "window.h"
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#include "shared/helpers.h"
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#include "shared/xalloc.h"
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struct clickdot {
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struct display *display;
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struct window *window;
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struct widget *widget;
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cairo_surface_t *buffer;
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struct {
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int32_t x, y;
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} dot;
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struct {
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int32_t x, y;
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int32_t old_x, old_y;
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} line;
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int reset;
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struct input *cursor_timeout_input;
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int cursor_timeout_fd;
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struct task cursor_timeout_task;
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};
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static void
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draw_line(struct clickdot *clickdot, cairo_t *cr,
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struct rectangle *allocation)
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{
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cairo_t *bcr;
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cairo_surface_t *tmp_buffer = NULL;
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if (clickdot->reset) {
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tmp_buffer = clickdot->buffer;
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clickdot->buffer = NULL;
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clickdot->line.x = -1;
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clickdot->line.y = -1;
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clickdot->line.old_x = -1;
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clickdot->line.old_y = -1;
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clickdot->reset = 0;
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}
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if (clickdot->buffer == NULL) {
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clickdot->buffer =
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cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
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allocation->width,
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allocation->height);
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bcr = cairo_create(clickdot->buffer);
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cairo_set_source_rgba(bcr, 0, 0, 0, 0);
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cairo_rectangle(bcr,
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0, 0,
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allocation->width, allocation->height);
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cairo_fill(bcr);
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}
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else
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bcr = cairo_create(clickdot->buffer);
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if (tmp_buffer) {
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cairo_set_source_surface(bcr, tmp_buffer, 0, 0);
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cairo_rectangle(bcr, 0, 0,
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allocation->width, allocation->height);
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cairo_clip(bcr);
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cairo_paint(bcr);
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cairo_surface_destroy(tmp_buffer);
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}
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if (clickdot->line.x != -1 && clickdot->line.y != -1) {
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if (clickdot->line.old_x != -1 &&
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clickdot->line.old_y != -1) {
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cairo_set_line_width(bcr, 2.0);
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cairo_set_source_rgb(bcr, 1, 1, 1);
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cairo_translate(bcr,
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-allocation->x, -allocation->y);
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cairo_move_to(bcr,
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clickdot->line.old_x,
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clickdot->line.old_y);
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cairo_line_to(bcr,
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clickdot->line.x,
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clickdot->line.y);
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cairo_stroke(bcr);
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}
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clickdot->line.old_x = clickdot->line.x;
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clickdot->line.old_y = clickdot->line.y;
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}
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cairo_destroy(bcr);
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cairo_set_source_surface(cr, clickdot->buffer,
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allocation->x, allocation->y);
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cairo_set_operator(cr, CAIRO_OPERATOR_ADD);
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cairo_rectangle(cr,
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allocation->x, allocation->y,
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allocation->width, allocation->height);
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cairo_clip(cr);
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cairo_paint(cr);
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}
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static void
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redraw_handler(struct widget *widget, void *data)
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{
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static const double r = 10.0;
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struct clickdot *clickdot = data;
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cairo_surface_t *surface;
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cairo_t *cr;
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struct rectangle allocation;
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widget_get_allocation(clickdot->widget, &allocation);
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surface = window_get_surface(clickdot->window);
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cr = cairo_create(surface);
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cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
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cairo_rectangle(cr,
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allocation.x,
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allocation.y,
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allocation.width,
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allocation.height);
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cairo_set_source_rgba(cr, 0, 0, 0, 0.8);
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cairo_fill(cr);
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draw_line(clickdot, cr, &allocation);
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cairo_translate(cr, clickdot->dot.x + 0.5, clickdot->dot.y + 0.5);
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cairo_set_line_width(cr, 1.0);
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cairo_set_source_rgb(cr, 0.1, 0.9, 0.9);
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cairo_move_to(cr, 0.0, -r);
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cairo_line_to(cr, 0.0, r);
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cairo_move_to(cr, -r, 0.0);
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cairo_line_to(cr, r, 0.0);
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cairo_arc(cr, 0.0, 0.0, r, 0.0, 2.0 * M_PI);
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cairo_stroke(cr);
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cairo_destroy(cr);
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cairo_surface_destroy(surface);
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}
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static void
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keyboard_focus_handler(struct window *window,
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struct input *device, void *data)
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{
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struct clickdot *clickdot = data;
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window_schedule_redraw(clickdot->window);
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}
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static void
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key_handler(struct window *window, struct input *input, uint32_t time,
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uint32_t key, uint32_t sym,
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enum wl_keyboard_key_state state, void *data)
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{
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struct clickdot *clickdot = data;
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if (state == WL_KEYBOARD_KEY_STATE_RELEASED)
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return;
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switch (sym) {
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case XKB_KEY_Escape:
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display_exit(clickdot->display);
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break;
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}
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}
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static void
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button_handler(struct widget *widget,
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struct input *input, uint32_t time,
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uint32_t button,
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enum wl_pointer_button_state state, void *data)
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{
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struct clickdot *clickdot = data;
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if (state == WL_POINTER_BUTTON_STATE_PRESSED && button == BTN_LEFT)
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input_get_position(input, &clickdot->dot.x, &clickdot->dot.y);
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widget_schedule_redraw(widget);
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}
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static void
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cursor_timeout_reset(struct clickdot *clickdot)
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{
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const long cursor_timeout = 500;
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struct itimerspec its;
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its.it_interval.tv_sec = 0;
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its.it_interval.tv_nsec = 0;
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its.it_value.tv_sec = cursor_timeout / 1000;
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its.it_value.tv_nsec = (cursor_timeout % 1000) * 1000 * 1000;
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timerfd_settime(clickdot->cursor_timeout_fd, 0, &its, NULL);
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}
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static int
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motion_handler(struct widget *widget,
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struct input *input, uint32_t time,
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float x, float y, void *data)
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{
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struct clickdot *clickdot = data;
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clickdot->line.x = x;
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clickdot->line.y = y;
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window_schedule_redraw(clickdot->window);
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cursor_timeout_reset(clickdot);
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clickdot->cursor_timeout_input = input;
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return CURSOR_BLANK;
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}
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static void
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resize_handler(struct widget *widget,
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int32_t width, int32_t height,
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void *data)
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{
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struct clickdot *clickdot = data;
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clickdot->reset = 1;
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}
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static void
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leave_handler(struct widget *widget,
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struct input *input, void *data)
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{
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struct clickdot *clickdot = data;
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clickdot->reset = 1;
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}
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static void
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cursor_timeout_func(struct task *task, uint32_t events)
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{
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struct clickdot *clickdot =
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container_of(task, struct clickdot, cursor_timeout_task);
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uint64_t exp;
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if (read(clickdot->cursor_timeout_fd, &exp, sizeof (uint64_t)) !=
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sizeof(uint64_t))
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abort();
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input_set_pointer_image(clickdot->cursor_timeout_input,
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CURSOR_LEFT_PTR);
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}
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static struct clickdot *
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clickdot_create(struct display *display)
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{
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struct clickdot *clickdot;
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clickdot = xzalloc(sizeof *clickdot);
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clickdot->window = window_create(display);
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clickdot->widget = window_frame_create(clickdot->window, clickdot);
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window_set_title(clickdot->window, "Wayland ClickDot");
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clickdot->display = display;
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clickdot->buffer = NULL;
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window_set_key_handler(clickdot->window, key_handler);
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window_set_user_data(clickdot->window, clickdot);
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window_set_keyboard_focus_handler(clickdot->window,
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keyboard_focus_handler);
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widget_set_redraw_handler(clickdot->widget, redraw_handler);
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widget_set_button_handler(clickdot->widget, button_handler);
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widget_set_motion_handler(clickdot->widget, motion_handler);
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widget_set_resize_handler(clickdot->widget, resize_handler);
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widget_set_leave_handler(clickdot->widget, leave_handler);
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widget_schedule_resize(clickdot->widget, 500, 400);
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clickdot->dot.x = 250;
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clickdot->dot.y = 200;
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clickdot->line.x = -1;
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clickdot->line.y = -1;
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clickdot->line.old_x = -1;
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clickdot->line.old_y = -1;
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clickdot->reset = 0;
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clickdot->cursor_timeout_fd =
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timerfd_create(CLOCK_MONOTONIC, TFD_CLOEXEC);
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clickdot->cursor_timeout_task.run = cursor_timeout_func;
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display_watch_fd(window_get_display(clickdot->window),
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clickdot->cursor_timeout_fd,
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EPOLLIN, &clickdot->cursor_timeout_task);
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return clickdot;
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}
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static void
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clickdot_destroy(struct clickdot *clickdot)
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{
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display_unwatch_fd(window_get_display(clickdot->window),
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clickdot->cursor_timeout_fd);
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close(clickdot->cursor_timeout_fd);
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if (clickdot->buffer)
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cairo_surface_destroy(clickdot->buffer);
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widget_destroy(clickdot->widget);
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window_destroy(clickdot->window);
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free(clickdot);
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}
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int
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main(int argc, char *argv[])
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{
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struct display *display;
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struct clickdot *clickdot;
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display = display_create(&argc, argv);
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if (display == NULL) {
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fprintf(stderr, "failed to create display: %m\n");
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return -1;
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}
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clickdot = clickdot_create(display);
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display_run(display);
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clickdot_destroy(clickdot);
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display_destroy(display);
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return 0;
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}
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