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https://gitlab.freedesktop.org/wayland/weston
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![Antonio Borneo](/assets/img/avatar_default.png)
The printf() format specifier "%m" is a glibc extension to print the string returned by strerror(errno). While supported by other libraries (e.g. uClibc and musl), it is not widely portable. In Weston code the format string is often passed to a logging function that calls other syscalls before the conversion of "%m" takes place. If one of such syscall modifies the value in errno, the conversion of "%m" will incorrectly report the error string corresponding to the new value of errno. Remove all the occurrences of the specifier "%m" in Weston code by using directly the string returned by strerror(errno). While there, fix some minor indentation issue. Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
346 lines
8.3 KiB
C
346 lines
8.3 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 <unistd.h>
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#include <time.h>
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#include <errno.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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struct toytimer cursor_timeout;
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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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toytimer_arm_once_usec(&clickdot->cursor_timeout, 500 * 1000);
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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 toytimer *tt)
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{
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struct clickdot *clickdot =
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container_of(tt, struct clickdot, cursor_timeout);
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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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toytimer_init(&clickdot->cursor_timeout, CLOCK_MONOTONIC,
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display, cursor_timeout_func);
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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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toytimer_fini(&clickdot->cursor_timeout);
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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: %s\n",
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strerror(errno));
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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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