mirror of
https://github.com/paperdash/device-epd.git
synced 2024-11-18 09:28:17 +00:00
22e8b6df19
- switch to canvas for print screen functionality - implement jpg encoder for print screen
71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
/**
|
|
* Copyright (c) 2012-2016 Moodstocks SAS
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
|
|
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
|
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
|
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*/
|
|
|
|
#include "buf.h"
|
|
#include "conf.h"
|
|
|
|
#define JPEC_BUFFER_INIT_SIZ 65536
|
|
|
|
jpec_buffer_t *jpec_buffer_new(void) {
|
|
// return jpec_buffer_new2(-1);
|
|
}
|
|
|
|
jpec_buffer_t *jpec_buffer_new2(int siz, jpec_enc_callback_t callback) {
|
|
if (siz < 0) siz = 0;
|
|
jpec_buffer_t *b = (jpec_buffer_t*)malloc(sizeof(*b));
|
|
// b->stream = NULL; // siz > 0 ? (uint8_t*) malloc(siz) : NULL;
|
|
b->siz = siz;
|
|
b->len = 0;
|
|
|
|
b->callback = callback;
|
|
|
|
return b;
|
|
}
|
|
|
|
void jpec_buffer_del(jpec_buffer_t *b) {
|
|
assert(b);
|
|
// if (b->stream) free(b->stream);
|
|
free(b);
|
|
}
|
|
|
|
void jpec_buffer_write_byte(jpec_buffer_t *b, int val) {
|
|
assert(b);
|
|
if (b->siz == b->len) {
|
|
int nsiz = (b->siz > 0) ? 2 * b->siz : JPEC_BUFFER_INIT_SIZ;
|
|
// void* tmp = realloc(b->stream, nsiz);
|
|
// b->stream = (uint8_t *) tmp;
|
|
b->siz = nsiz;
|
|
}
|
|
// b->stream[b->len++] = (uint8_t) val;
|
|
b->len++;
|
|
|
|
// callback
|
|
b->callback(b->len, (uint8_t) val);
|
|
}
|
|
|
|
void jpec_buffer_write_2bytes(jpec_buffer_t *b, int val) {
|
|
assert(b);
|
|
jpec_buffer_write_byte(b, (val >> 8) & 0xFF);
|
|
jpec_buffer_write_byte(b, val & 0xFF);
|
|
}
|