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#ifndef TEST_SPNG_H
#define TEST_SPNG_H
#include "spngt_common.h"
#include <spng.h>
#include <string.h>
int spng_get_trns_fmt(spng_ctx *ctx, int *fmt)
{
if(ctx == NULL || fmt == NULL) return 1;
struct spng_trns trns;
struct spng_ihdr ihdr;
if(spng_get_ihdr(ctx, &ihdr)) return 1;
if(!spng_get_trns(ctx, &trns))
{
if(ihdr.color_type == SPNG_COLOR_TYPE_TRUECOLOR)
{
if(ihdr.bit_depth == 16) *fmt = SPNG_FMT_RGBA16;
else *fmt = SPNG_FMT_RGBA8;
}
else if(ihdr.color_type == SPNG_COLOR_TYPE_INDEXED)
{
*fmt = SPNG_FMT_RGBA8;
}
else if(ihdr.color_type == SPNG_COLOR_TYPE_GRAYSCALE)
{
if(ihdr.bit_depth == 16) *fmt = SPNG_FMT_GA16;
else *fmt = SPNG_FMT_GA8;
}
}
else return 1;
return 0;
}
spng_ctx *init_spng(spngt_test_case *test_case, struct spng_ihdr *ihdr)
{
int r = 0;
spng_ctx *ctx = spng_ctx_new(0);
if(ctx == NULL)
{
printf("spng_ctx_new() failed\n");
return NULL;
}
if(test_case->source.type == SPNGT_SRC_FILE) r = spng_set_png_file(ctx, test_case->source.file);
else if(test_case->source.type == SPNGT_SRC_BUFFER) r = spng_set_png_buffer(ctx, test_case->source.buffer, test_case->source.png_size);
if(r)
{
printf("spng_set_png_file/buffer() error: %s\n", spng_strerror(r));
goto err;
}
r = spng_set_option(ctx, SPNG_KEEP_UNKNOWN_CHUNKS, 1);
if(r)
{
printf("spng_set_option() error: %s\n", spng_strerror(r));
goto err;
}
r = spng_set_image_limits(ctx, 16000, 16000);
if(r)
{
printf("spng_set_image_limits() error: %s\n", spng_strerror(r));
goto err;
}
r = spng_set_chunk_limits(ctx, 66 * 1000 * 1000, 66 * 1000* 1000);
if(r)
{
printf("spng_set_chunk_limits() error: %s\n", spng_strerror(r));
goto err;
}
struct spng_ihdr tmp;
if(!ihdr) ihdr = &tmp;
r = spng_get_ihdr(ctx, ihdr);
if(r)
{
printf("spng_get_ihdr() error: %s\n", spng_strerror(r));
goto err;
}
return ctx;
err:
spng_ctx_free(ctx);
return NULL;
}
unsigned char *getimage_spng(spng_ctx *ctx, size_t *out_size, int fmt, int flags)
{
int r;
size_t siz, out_width;
unsigned char *out = NULL;
struct spng_ihdr ihdr;
struct spng_row_info row_info;
r = spng_get_ihdr(ctx, &ihdr);
if(r)
{
printf("spng_get_ihdr() error: %s\n", spng_strerror(r));
goto err;
}
r = spng_decode_chunks(ctx);
if(r)
{
printf("spng_decode_chunks() error: %s\n", spng_strerror(r));
goto err;
}
if(fmt == SPNGT_FMT_VIPS)
{
fmt = SPNG_FMT_PNG;
if(ihdr.color_type == SPNG_COLOR_TYPE_INDEXED) fmt = SPNG_FMT_RGB8;
else if(ihdr.color_type == SPNG_COLOR_TYPE_GRAYSCALE && ihdr.bit_depth < 8) fmt = SPNG_FMT_G8;
spng_get_trns_fmt(ctx, &fmt);
/*printf("VIPS format: %s\n", fmt_str(fmt));*/
}
r = spng_decoded_image_size(ctx, fmt, &siz);
if(r)
{
printf("spng_decoded_image_size() error: %s\n", spng_strerror(r));
goto err;
}
*out_size = siz;
out_width = siz / ihdr.height;
/* Neither library does zero-padding for <8-bit images,
but we want the images to be bit-identical for memcmp() */
out = calloc(1, siz);
if(out == NULL) goto err;
r = spng_decode_image(ctx, NULL, 0, fmt, flags | SPNG_DECODE_PROGRESSIVE);
if(r)
{
printf("progressive spng_decode_image() error: %s\n", spng_strerror(r));
goto err;
}
do
{
r = spng_get_row_info(ctx, &row_info);
if(r) break;
r = spng_decode_row(ctx, out + row_info.row_num * out_width, out_width);
}while (!r);
if(r != SPNG_EOI)
{
printf("progressive decode error: %s\n", spng_strerror(r));
goto err;
}
r = spng_get_time(ctx, NULL);
if(r == SPNG_ECHUNKAVAIL || r == SPNG_EINVAL) r = 0;
if(r)
{
printf("error at end of image: %s\n", spng_strerror(r));
goto err;
}
return out;
err:
if(out != NULL) free(out);
return NULL;
}
#endif /* TEST_SPNG_H */
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