91 lines
1.8 KiB
C
91 lines
1.8 KiB
C
#include <common.h>
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#include <errno.h>
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#include <malloc.h>
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#include <fb.h>
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#include <asm/byteorder.h>
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#include <init.h>
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#include <gui/image_renderer.h>
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#include <gui/graphic_utils.h>
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#include <linux/zlib.h>
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#include "lodepng.h"
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#include "png.h"
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unsigned lodepng_custom_zlib_decompress(unsigned char** out, size_t* outsize,
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const unsigned char* in, size_t insize,
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const LodePNGDecompressSettings* settings)
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{
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int err;
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png_stream.next_in = in;
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png_stream.avail_in = insize;
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png_stream.next_out = *out;
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png_stream.avail_out = *outsize;
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err = zlib_inflateReset(&png_stream);
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if (err != Z_OK) {
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printk("zlib_inflateReset error %d\n", err);
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zlib_inflateEnd(&png_stream);
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zlib_inflateInit(&png_stream);
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}
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err = zlib_inflate(&png_stream, Z_FINISH);
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if (err != Z_STREAM_END)
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goto err;
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return 0;
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err:
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printk("Error %d while decompressing!\n", err);
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printk("%p(%zd)->%p(%zd)\n", in, insize, *out, *outsize);
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return -EIO;
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}
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struct image *png_open(char *inbuf, int insize)
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{
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LodePNGState state;
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int ret;
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unsigned error;
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struct image *img = calloc(1, sizeof(struct image));
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unsigned char *png;
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if (!img)
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return ERR_PTR(-ENOMEM);
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ret = png_uncompress_init();
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if (ret)
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goto err;
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lodepng_state_init(&state);
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state.info_raw.colortype = LCT_RGBA;
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state.info_raw.bitdepth = 8;
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error = lodepng_decode(&png, &img->width, &img->height, &state, inbuf, insize);
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if(error) {
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printf("error %u: %s\n", error, lodepng_error_text(error));
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ret = -EINVAL;
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goto err;
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}
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img->bits_per_pixel = 4 << 3;
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img->data = png;
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pr_debug("png: %d x %d data@0x%p\n", img->width, img->height, img->data);
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lodepng_state_cleanup(&state);
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return img;
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err:
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free(png);
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free(img);
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return ERR_PTR(ret);
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}
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void png_close(struct image *img)
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{
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free(img->data);
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png_uncompress_exit();
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}
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