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#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 "lodepng.h"
#include "png.h"
unsigned lodepng_custom_zlib_decompress(unsigned char** out, size_t* outsize,
const unsigned char* in, size_t insize,
const LodePNGDecompressSettings* settings)
{
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)
{
LodePNGState state;
int ret;
unsigned error;
struct image *img;
unsigned char *png = NULL;
ret = png_uncompress_init();
if (ret)
return ERR_PTR(ret);
img = calloc(1, sizeof(struct image));
if (!img)
return ERR_PTR(-ENOMEM);
lodepng_state_init(&state);
state.info_raw.colortype = LCT_RGBA;
state.info_raw.bitdepth = 8;
error = lodepng_decode(&png, &img->width, &img->height, &state, inbuf, insize);
if(error) {
printf("error %u: %s\n", error, lodepng_error_text(error));
ret = -EINVAL;
goto err;
}
img->bits_per_pixel = 4 << 3;
img->data = png;
pr_debug("png: %d x %d data@0x%p\n", img->width, img->height, img->data);
lodepng_state_cleanup(&state);
return img;
err:
free(png);
free(img);
return ERR_PTR(ret);
}
void png_close(struct image *img)
{
free(img->data);
png_uncompress_exit();
}
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