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Diffstat (limited to 'Build/source/libs/libpng/libpng-1.6.18/contrib/libtests/readpng.c')
-rw-r--r-- | Build/source/libs/libpng/libpng-1.6.18/contrib/libtests/readpng.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/Build/source/libs/libpng/libpng-1.6.18/contrib/libtests/readpng.c b/Build/source/libs/libpng/libpng-1.6.18/contrib/libtests/readpng.c new file mode 100644 index 00000000000..7ba46d0b96b --- /dev/null +++ b/Build/source/libs/libpng/libpng-1.6.18/contrib/libtests/readpng.c @@ -0,0 +1,104 @@ +/* readpng.c + * + * Copyright (c) 2013 John Cunningham Bowler + * + * Last changed in libpng 1.6.1 [March 28, 2013] + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * Load an arbitrary number of PNG files (from the command line, or, if there + * are no arguments on the command line, from stdin) then run a time test by + * reading each file by row. The test does nothing with the read result and + * does no transforms. The only output is a time as a floating point number of + * seconds with 9 decimal digits. + */ +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#if defined(HAVE_CONFIG_H) && !defined(PNG_NO_CONFIG_H) +# include <config.h> +#endif + +/* Define the following to use this test against your installed libpng, rather + * than the one being built here: + */ +#ifdef PNG_FREESTANDING_TESTS +# include <png.h> +#else +# include "../../png.h" +#endif + +static int +read_png(FILE *fp) +{ + png_structp png_ptr = png_create_read_struct(PNG_LIBPNG_VER_STRING,0,0,0); + png_infop info_ptr = NULL; + png_bytep row = NULL, display = NULL; + + if (png_ptr == NULL) + return 0; + + if (setjmp(png_jmpbuf(png_ptr))) + { + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + if (row != NULL) free(row); + if (display != NULL) free(display); + return 0; + } + + png_init_io(png_ptr, fp); + + info_ptr = png_create_info_struct(png_ptr); + if (info_ptr == NULL) + png_error(png_ptr, "OOM allocating info structure"); + + png_set_keep_unknown_chunks(png_ptr, PNG_HANDLE_CHUNK_ALWAYS, NULL, 0); + + png_read_info(png_ptr, info_ptr); + + { + png_size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr); + + row = malloc(rowbytes); + display = malloc(rowbytes); + + if (row == NULL || display == NULL) + png_error(png_ptr, "OOM allocating row buffers"); + + { + png_uint_32 height = png_get_image_height(png_ptr, info_ptr); + int passes = png_set_interlace_handling(png_ptr); + int pass; + + png_start_read_image(png_ptr); + + for (pass = 0; pass < passes; ++pass) + { + png_uint_32 y = height; + + /* NOTE: this trashes the row each time; interlace handling won't + * work, but this avoids memory thrashing for speed testing. + */ + while (y-- > 0) + png_read_row(png_ptr, row, display); + } + } + } + + /* Make sure to read to the end of the file: */ + png_read_end(png_ptr, info_ptr); + png_destroy_read_struct(&png_ptr, &info_ptr, NULL); + free(row); + free(display); + return 1; +} + +int +main(void) +{ + /* Exit code 0 on success. */ + return !read_png(stdin); +} |