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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>
302 lines
7.5 KiB
C
302 lines
7.5 KiB
C
/*
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* Copyright © 2008 Kristian Høgsberg
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* Copyright © 2012 Intel Corporation
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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 <math.h>
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#include <errno.h>
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#include <cairo.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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struct transformed {
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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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int width, height;
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int fullscreen;
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};
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static void
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draw_stuff(cairo_t *cr, int width, int height)
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{
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cairo_matrix_t m;
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cairo_get_matrix (cr, &m);
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cairo_translate(cr, width / 2, height / 2);
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cairo_scale(cr, width / 2, height / 2);
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cairo_set_source_rgba(cr, 0, 0, 0.3, 1.0);
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cairo_set_source_rgba(cr, 0, 0, 0, 1.0);
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cairo_rectangle(cr, -1, -1, 2, 2);
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cairo_fill(cr);
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cairo_set_source_rgb(cr, 1, 0, 0);
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cairo_move_to(cr, 0, 0);
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cairo_line_to(cr, 0, -1);
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cairo_save(cr);
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cairo_set_matrix(cr, &m);
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cairo_set_line_width(cr, 2.0);
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cairo_stroke(cr);
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cairo_restore(cr);
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cairo_set_source_rgb(cr, 0, 1, 0);
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cairo_move_to(cr, 0, 0);
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cairo_line_to(cr, 1, 0);
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cairo_save(cr);
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cairo_set_matrix(cr, &m);
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cairo_set_line_width(cr, 2.0);
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cairo_stroke(cr);
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cairo_restore(cr);
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cairo_set_source_rgb(cr, 1, 1, 1);
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cairo_move_to(cr, 0, 0);
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cairo_line_to(cr, 0, 1);
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cairo_move_to(cr, 0, 0);
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cairo_line_to(cr, -1, 0);
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cairo_save(cr);
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cairo_set_matrix(cr, &m);
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cairo_set_line_width(cr, 2.0);
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cairo_stroke(cr);
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cairo_restore(cr);
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cairo_destroy(cr);
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}
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static void
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fullscreen_handler(struct window *window, void *data)
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{
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struct transformed *transformed = data;
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transformed->fullscreen ^= 1;
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window_set_fullscreen(window, transformed->fullscreen);
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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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struct transformed *transformed = data;
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struct rectangle allocation;
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cairo_surface_t *surface;
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cairo_t *cr;
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surface = window_get_surface(transformed->window);
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if (surface == NULL ||
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cairo_surface_status(surface) != CAIRO_STATUS_SUCCESS) {
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fprintf(stderr, "failed to create cairo egl surface\n");
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return;
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}
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widget_get_allocation(transformed->widget, &allocation);
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cr = widget_cairo_create(widget);
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draw_stuff(cr, allocation.width, allocation.height);
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cairo_surface_destroy(surface);
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}
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static void
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output_handler(struct window *window, struct output *output, int enter,
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void *data)
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{
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if (!enter)
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return;
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window_set_buffer_transform(window, output_get_transform(output));
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window_set_buffer_scale(window, output_get_scale(output));
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window_schedule_redraw(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, enum wl_keyboard_key_state state,
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void *data)
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{
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int transform, scale;
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if (state == WL_KEYBOARD_KEY_STATE_RELEASED)
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return;
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transform = window_get_buffer_transform (window);
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scale = window_get_buffer_scale (window);
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switch (sym) {
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case XKB_KEY_Left:
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if (transform == 0)
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transform = 3;
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else if (transform == 4)
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transform = 7;
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else
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transform--;
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break;
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case XKB_KEY_Right:
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if (transform == 3)
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transform = 0;
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else if (transform == 7)
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transform = 4;
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else
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transform++;
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break;
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case XKB_KEY_space:
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if (transform >= 4)
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transform -= 4;
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else
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transform += 4;
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break;
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case XKB_KEY_z:
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if (scale == 1)
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scale = 2;
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else
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scale = 1;
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break;
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}
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printf ("setting buffer transform to %d\n", transform);
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printf ("setting buffer scale to %d\n", scale);
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window_set_buffer_transform(window, transform);
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window_set_buffer_scale(window, scale);
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window_schedule_redraw(window);
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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, enum wl_pointer_button_state state, void *data)
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{
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struct transformed *transformed = data;
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switch (button) {
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case BTN_LEFT:
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if (state == WL_POINTER_BUTTON_STATE_PRESSED)
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window_move(transformed->window, input,
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display_get_serial(transformed->display));
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break;
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case BTN_MIDDLE:
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if (state == WL_POINTER_BUTTON_STATE_PRESSED)
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widget_schedule_redraw(widget);
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break;
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case BTN_RIGHT:
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if (state == WL_POINTER_BUTTON_STATE_PRESSED)
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window_show_frame_menu(transformed->window, input, time);
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break;
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}
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}
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static void
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touch_handler(struct widget *widget, struct input *input,
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uint32_t serial, uint32_t time, int32_t id,
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float x, float y, void *data)
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{
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struct transformed *transformed = data;
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window_move(transformed->window, input, display_get_serial(transformed->display));
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}
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static void
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usage(int error_code)
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{
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fprintf(stderr, "Usage: transformed [OPTIONS]\n\n"
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" -d\t\tUse \"driver\" fullscreen method\n"
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" -w <width>\tSet window width to <width>\n"
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" -h <height>\tSet window height to <height>\n"
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" --help\tShow this help text\n\n");
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exit(error_code);
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}
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int main(int argc, char *argv[])
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{
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struct transformed transformed;
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struct display *d;
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int i;
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transformed.width = 500;
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transformed.height = 250;
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transformed.fullscreen = 0;
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for (i = 1; i < argc; i++) {
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if (strcmp(argv[i], "-w") == 0) {
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if (++i >= argc)
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usage(EXIT_FAILURE);
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transformed.width = atol(argv[i]);
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} else if (strcmp(argv[i], "-h") == 0) {
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if (++i >= argc)
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usage(EXIT_FAILURE);
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transformed.height = atol(argv[i]);
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} else if (strcmp(argv[i], "--help") == 0)
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usage(EXIT_SUCCESS);
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else
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usage(EXIT_FAILURE);
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}
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d = display_create(&argc, argv);
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if (d == 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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transformed.display = d;
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transformed.window = window_create(d);
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transformed.widget =
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window_add_widget(transformed.window, &transformed);
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window_set_title(transformed.window, "Transformed");
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widget_set_transparent(transformed.widget, 0);
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widget_set_default_cursor(transformed.widget, CURSOR_BLANK);
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widget_set_redraw_handler(transformed.widget, redraw_handler);
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widget_set_button_handler(transformed.widget, button_handler);
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widget_set_touch_down_handler(transformed.widget, touch_handler);
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window_set_key_handler(transformed.window, key_handler);
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window_set_fullscreen_handler(transformed.window, fullscreen_handler);
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window_set_output_handler(transformed.window, output_handler);
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window_set_user_data(transformed.window, &transformed);
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window_schedule_resize(transformed.window,
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transformed.width, transformed.height);
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display_run(d);
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widget_destroy(transformed.widget);
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window_destroy(transformed.window);
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display_destroy(d);
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return 0;
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}
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