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// SPDX-License-Identifier: GPL-2.0-only
#include <common.h>
#include <errno.h>
#include <malloc.h>
#include <fb.h>
#include <asm/byteorder.h>
#include <init.h>
#include <gui/image_renderer.h>
#include <gui/graphic_utils.h>
#include <linux/zlib.h>
#include "picopng.h"
#include "png.h"
unsigned picopng_zlib_decompress(unsigned char* out, size_t outsize,
const unsigned char* in, size_t insize)
{
int err;
png_stream.next_in = in;
png_stream.avail_in = insize;
png_stream.next_out = out;
png_stream.avail_out = outsize;
err = zlib_inflateReset(&png_stream);
if (err != Z_OK) {
printk("zlib_inflateReset error %d\n", err);
zlib_inflateEnd(&png_stream);
zlib_inflateInit(&png_stream);
}
err = zlib_inflate(&png_stream, Z_FINISH);
if (err != Z_STREAM_END)
goto err;
return 0;
err:
printk("Error %d while decompressing!\n", err);
printk("%p(%zd)->%p(%zd)\n", in, insize, out, outsize);
return -EIO;
}
struct image *png_open(char *inbuf, int insize)
{
PNG_info_t *png_info;
int ret;
struct image *img = calloc(1, sizeof(struct image));
if (!img)
return ERR_PTR(-ENOMEM);
ret = png_uncompress_init();
if (ret)
goto err;
/* rgba */
png_info = PNG_decode(inbuf, insize);
if(PNG_error) {
printf("error %i:\n", PNG_error);
ret = -EINVAL;
goto err;
}
img->width = png_info->width;
img->height = png_info->height;
img->bits_per_pixel = 4 << 3;
img->data = png_info->image->data;
pr_debug("png: %d x %d data@0x%p\n", img->width, img->height, img->data);
png_alloc_free_all();
return img;
err:
png_alloc_free_all();
free(img);
return ERR_PTR(ret);
}
void png_close(struct image *img)
{
free(img->data);
png_alloc_free_all();
}
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