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/*
* Copyright (C) 2015 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <unistd.h>
#include <stdlib.h>
#include <limits.h>
#include <time.h>
#include <linux/input.h>
#include <functional>
#include <cutils/klog.h>
#include <minui/minui.h>
#include <utils/SystemClock.h>
#define NEXT_TIMEOUT_MS 5000
#define LAST_TIMEOUT_MS 30000
#define LOGE(x...) do { KLOG_ERROR("slideshow", x); } while (0)
static int input_cb(int fd, unsigned int epevents, int *key_code)
{
struct input_event ev;
*key_code = -1;
if (ev_get_input(fd, epevents, &ev)) {
return -1;
}
if (ev.type == EV_KEY && ev.value == 1) {
*key_code = ev.code;
}
return 0;
}
static void clear()
{
gr_color(0, 0, 0, 0);
gr_clear();
gr_flip();
}
static void draw(const char *resname)
{
GRSurface* surface;
int w, h, x, y;
if (res_create_display_surface(resname, &surface) < 0) {
LOGE("failed to create surface for %s\n", resname);
return;
}
w = gr_get_width(surface);
h = gr_get_height(surface);
x = (gr_fb_width() - w) / 2;
y = (gr_fb_height() - h) / 2;
gr_blit(surface, 0, 0, w, h, x, y);
gr_flip();
res_free_surface(surface);
}
int usage()
{
LOGE("usage: slideshow [-t timeout] image.png [image2.png ...] last.png\n");
return EXIT_FAILURE;
}
int main(int argc, char **argv)
{
int key_code = -1;
int input = false;
int opt;
long int timeout = NEXT_TIMEOUT_MS;
int64_t start;
while ((opt = getopt(argc, argv, "t:")) != -1) {
switch (opt) {
case 't':
timeout = strtol(optarg, NULL, 0);
if (timeout < 0 || timeout >= LONG_MAX) {
timeout = NEXT_TIMEOUT_MS;
LOGE("invalid timeout %s, defaulting to %ld\n", optarg,
timeout);
}
break;
default:
return usage();
}
}
if (optind >= argc) {
return usage();
}
if (gr_init() == -1 || ev_init(std::bind(&input_cb, std::placeholders::_1,
std::placeholders::_2, &key_code)) == -1) {
LOGE("failed to initialize minui\n");
return EXIT_FAILURE;
}
/* display all images except the last one, switch to next image after
* timeout or user input */
while (optind < argc - 1) {
draw(argv[optind++]);
start = android::uptimeMillis();
long int timeout_remaining = timeout;
do {
if (ev_wait(timeout_remaining) == 0) {
ev_dispatch();
if (key_code != -1) {
input = true;
break;
}
}
timeout_remaining -= android::uptimeMillis() - start;
} while (timeout_remaining > 0);
};
/* if there was user input while showing the images, display the last
* image and wait until the power button is pressed or LAST_TIMEOUT_MS
* has elapsed */
if (input) {
start = android::uptimeMillis();
draw(argv[optind]);
do {
if (ev_wait(timeout) == 0) {
ev_dispatch();
}
if (android::uptimeMillis() - start >= LAST_TIMEOUT_MS) {
break;
}
} while (key_code != KEY_POWER);
}
clear();
gr_exit();
ev_exit();
return EXIT_SUCCESS;
}
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