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Diffstat (limited to 'Build/source/libs/libpng/libpng-1.6.2/contrib/libtests/makepng.c')
-rw-r--r-- | Build/source/libs/libpng/libpng-1.6.2/contrib/libtests/makepng.c | 1486 |
1 files changed, 0 insertions, 1486 deletions
diff --git a/Build/source/libs/libpng/libpng-1.6.2/contrib/libtests/makepng.c b/Build/source/libs/libpng/libpng-1.6.2/contrib/libtests/makepng.c deleted file mode 100644 index 9f11b29645b..00000000000 --- a/Build/source/libs/libpng/libpng-1.6.2/contrib/libtests/makepng.c +++ /dev/null @@ -1,1486 +0,0 @@ -/* makepng.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 - * - * Make a test PNG image. The arguments are as follows: - * - * makepng [--sRGB|--linear|--1.8] [--color=<color>] color-type bit-depth \ - * [file-name] - * - * The color-type may be numeric (and must match the numbers used by the PNG - * specification) or one of the format names listed below. The bit-depth is the - * component bit depth, or the pixel bit-depth for a color-mapped image. - * - * Without any options no color-space information is written, with the options - * an sRGB or the appropriate gAMA chunk is written. "1.8" refers to the - * display system used on older Apple computers to correct for high ambient - * light levels in the viewing environment; it applies a transform of - * approximately value^(1/1.45) to the color values and so a gAMA chunk of 65909 - * is written (1.45/2.2). - * - * The image data is generated internally. Unless --color is given the images - * used are as follows: - * - * 1 channel: a square image with a diamond, the least luminous colors are on - * the edge of the image, the most luminous in the center. - * - * 2 channels: the color channel increases in luminosity from top to bottom, the - * alpha channel increases in opacity from left to right. - * - * 3 channels: linear combinations of, from the top-left corner clockwise, - * black, green, white, red. - * - * 4 channels: linear combinations of, from the top-left corner clockwise, - * transparent, red, green, blue. - * - * For color-mapped images a four channel color-map is used and the PNG file has - * a tRNS chunk, as follows: - * - * 1-bit: entry 0 is transparent-red, entry 1 is opaque-white - * 2-bit: entry 0: transparent-green - * entry 1: 40%-red - * entry 2: 80%-blue - * entry 3: opaque-white - * 4-bit: the 16 combinations of the 2-bit case - * 8-bit: the 256 combinations of the 4-bit case - * - * The palette always has 2^bit-depth entries and the tRNS chunk one fewer. The - * image is the 1-channel diamond, but using palette index, not luminosity. - * - * Image size is determined by the final pixel depth in bits, i.e. channels x - * bit-depth, as follows: - * - * 8 bits or less: 64x64 - * 16 bits: 256x256 - * More than 16 bits: 1024x1024 - * - * Row filtering is turned off (the 'none' filter is used on every row) and the - * images are not interlaced. - * - * If --color is given then the whole image has that color, color-mapped images - * will have exactly one palette entry and all image files with be 16x16 in - * size. The color value is 1 to 4 decimal numbers as appropriate for the color - * type. - * - * If file-name is given then the PNG is written to that file, else it is - * written to stdout. Notice that stdout is not supported on systems where, by - * default, it assumes text output; this program makes no attempt to change the - * text mode of stdout! - */ -#define _ISOC99_SOURCE /* for strtoull */ - -#include <stddef.h> /* for offsetof */ -#include <stdlib.h> -#include <stdio.h> -#include <string.h> -#include <ctype.h> -#include <math.h> -#include <errno.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 - -/* This structure is used for inserting extra chunks (the --insert argument, not - * documented above.) - */ -typedef struct chunk_insert -{ - struct chunk_insert *next; - void (*insert)(png_structp, png_infop, int, png_charpp); - int nparams; - png_charp parameters[1]; -} chunk_insert; - -static int -channels_of_type(int color_type) -{ - if (color_type & PNG_COLOR_MASK_PALETTE) - return 1; - - else - { - int channels = 1; - - if (color_type & PNG_COLOR_MASK_COLOR) - channels = 3; - - if (color_type & PNG_COLOR_MASK_ALPHA) - return channels + 1; - - else - return channels; - } -} - -static int -pixel_depth_of_type(int color_type, int bit_depth) -{ - return channels_of_type(color_type) * bit_depth; -} - -static unsigned int -image_size_of_type(int color_type, int bit_depth, unsigned int *colors) -{ - if (*colors) - return 16; - - else - { - int pixel_depth = pixel_depth_of_type(color_type, bit_depth); - - if (pixel_depth < 8) - return 64; - - else if (pixel_depth > 16) - return 1024; - - else - return 256; - } -} - -static void -set_color(png_colorp color, png_bytep trans, unsigned int red, - unsigned int green, unsigned int blue, unsigned int alpha, - png_const_bytep gamma_table) -{ - color->red = gamma_table[red]; - color->green = gamma_table[green]; - color->blue = gamma_table[blue]; - *trans = (png_byte)alpha; -} - -static int -generate_palette(png_colorp palette, png_bytep trans, int bit_depth, - png_const_bytep gamma_table, unsigned int *colors) -{ - /* - * 1-bit: entry 0 is transparent-red, entry 1 is opaque-white - * 2-bit: entry 0: transparent-green - * entry 1: 40%-red - * entry 2: 80%-blue - * entry 3: opaque-white - * 4-bit: the 16 combinations of the 2-bit case - * 8-bit: the 256 combinations of the 4-bit case - */ - switch (colors[0]) - { - default: - fprintf(stderr, "makepng: --colors=...: invalid count %u\n", - colors[0]); - exit(1); - - case 1: - set_color(palette+0, trans+0, colors[1], colors[1], colors[1], 255, - gamma_table); - return 1; - - case 2: - set_color(palette+0, trans+0, colors[1], colors[1], colors[1], - colors[2], gamma_table); - return 1; - - case 3: - set_color(palette+0, trans+0, colors[1], colors[2], colors[3], 255, - gamma_table); - return 1; - - case 4: - set_color(palette+0, trans+0, colors[1], colors[2], colors[3], - colors[4], gamma_table); - return 1; - - case 0: - if (bit_depth == 1) - { - set_color(palette+0, trans+0, 255, 0, 0, 0, gamma_table); - set_color(palette+1, trans+1, 255, 255, 255, 255, gamma_table); - return 2; - } - - else - { - unsigned int size = 1U << (bit_depth/2); /* 2, 4 or 16 */ - unsigned int x, y, ip; - - for (x=0; x<size; ++x) for (y=0; y<size; ++y) - { - ip = x + (size * y); - - /* size is at most 16, so the scaled value below fits in 16 bits - */ -# define interp(pos, c1, c2) ((pos * c1) + ((size-pos) * c2)) -# define xyinterp(x, y, c1, c2, c3, c4) (((size * size / 2) +\ - (interp(x, c1, c2) * y + (size-y) * interp(x, c3, c4))) /\ - (size*size)) - - set_color(palette+ip, trans+ip, - /* color: green, red,blue,white */ - xyinterp(x, y, 0, 255, 0, 255), - xyinterp(x, y, 255, 0, 0, 255), - xyinterp(x, y, 0, 0, 255, 255), - /* alpha: 0, 102, 204, 255) */ - xyinterp(x, y, 0, 102, 204, 255), - gamma_table); - } - - return ip+1; - } - } -} - -static void -set_value(png_bytep row, size_t rowbytes, png_uint_32 x, unsigned int bit_depth, - png_uint_32 value, png_const_bytep gamma_table, double conv) -{ - unsigned int mask = (1U << bit_depth)-1; - - x *= bit_depth; /* Maximum x is 4*1024, maximum bit_depth is 16 */ - - if (value <= mask) - { - png_uint_32 offset = x >> 3; - - if (offset < rowbytes && (bit_depth < 16 || offset+1 < rowbytes)) - { - row += offset; - - switch (bit_depth) - { - case 1: - case 2: - case 4: - /* Don't gamma correct - values get smashed */ - { - unsigned int shift = (8 - bit_depth) - (x & 0x7U); - - mask <<= shift; - value = (value << shift) & mask; - *row = (png_byte)((*row & ~mask) | value); - } - return; - - default: - fprintf(stderr, "makepng: bad bit depth (internal error)\n"); - exit(1); - - case 16: - value = (unsigned int)floor(65535*pow(value/65535.,conv)+.5); - *row++ = (png_byte)(value >> 8); - *row = (png_byte)value; - return; - - case 8: - *row = gamma_table[value]; - return; - } - } - - else - { - fprintf(stderr, "makepng: row buffer overflow (internal error)\n"); - exit(1); - } - } - - else - { - fprintf(stderr, "makepng: component overflow (internal error)\n"); - exit(1); - } -} - -static void -generate_row(png_bytep row, size_t rowbytes, unsigned int y, int color_type, - int bit_depth, png_const_bytep gamma_table, double conv, - unsigned int *colors) -{ - png_uint_32 size_max = image_size_of_type(color_type, bit_depth, colors)-1; - png_uint_32 depth_max = (1U << bit_depth)-1; /* up to 65536 */ - - if (colors[0] == 0) switch (channels_of_type(color_type)) - { - /* 1 channel: a square image with a diamond, the least luminous colors are on - * the edge of the image, the most luminous in the center. - */ - case 1: - { - png_uint_32 x; - png_uint_32 base = 2*size_max - abs(2*y-size_max); - - for (x=0; x<=size_max; ++x) - { - png_uint_32 luma = base - abs(2*x-size_max); - - /* 'luma' is now in the range 0..2*size_max, we need - * 0..depth_max - */ - luma = (luma*depth_max + size_max) / (2*size_max); - set_value(row, rowbytes, x, bit_depth, luma, gamma_table, conv); - } - } - break; - - /* 2 channels: the color channel increases in luminosity from top to bottom, - * the alpha channel increases in opacity from left to right. - */ - case 2: - { - png_uint_32 alpha = (depth_max * y * 2 + size_max) / (2 * size_max); - png_uint_32 x; - - for (x=0; x<=size_max; ++x) - { - set_value(row, rowbytes, 2*x, bit_depth, - (depth_max * x * 2 + size_max) / (2 * size_max), gamma_table, - conv); - set_value(row, rowbytes, 2*x+1, bit_depth, alpha, gamma_table, - conv); - } - } - break; - - /* 3 channels: linear combinations of, from the top-left corner clockwise, - * black, green, white, red. - */ - case 3: - { - /* x0: the black->red scale (the value of the red component) at the - * start of the row (blue and green are 0). - * x1: the green->white scale (the value of the red and blue - * components at the end of the row; green is depth_max). - */ - png_uint_32 Y = (depth_max * y * 2 + size_max) / (2 * size_max); - png_uint_32 x; - - /* Interpolate x/depth_max from start to end: - * - * start end difference - * red: Y Y 0 - * green: 0 depth_max depth_max - * blue: 0 Y Y - */ - for (x=0; x<=size_max; ++x) - { - set_value(row, rowbytes, 3*x+0, bit_depth, /* red */ Y, - gamma_table, conv); - set_value(row, rowbytes, 3*x+1, bit_depth, /* green */ - (depth_max * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - set_value(row, rowbytes, 3*x+2, bit_depth, /* blue */ - (Y * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - } - } - break; - - /* 4 channels: linear combinations of, from the top-left corner clockwise, - * transparent, red, green, blue. - */ - case 4: - { - /* x0: the transparent->blue scale (the value of the blue and alpha - * components) at the start of the row (red and green are 0). - * x1: the red->green scale (the value of the red and green - * components at the end of the row; blue is 0 and alpha is - * depth_max). - */ - png_uint_32 Y = (depth_max * y * 2 + size_max) / (2 * size_max); - png_uint_32 x; - - /* Interpolate x/depth_max from start to end: - * - * start end difference - * red: 0 depth_max-Y depth_max-Y - * green: 0 Y Y - * blue: Y 0 -Y - * alpha: Y depth_max depth_max-Y - */ - for (x=0; x<=size_max; ++x) - { - set_value(row, rowbytes, 4*x+0, bit_depth, /* red */ - ((depth_max-Y) * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - set_value(row, rowbytes, 4*x+1, bit_depth, /* green */ - (Y * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - set_value(row, rowbytes, 4*x+2, bit_depth, /* blue */ - Y - (Y * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - set_value(row, rowbytes, 4*x+3, bit_depth, /* alpha */ - Y + ((depth_max-Y) * x * 2 + size_max) / (2 * size_max), - gamma_table, conv); - } - } - break; - - default: - fprintf(stderr, "makepng: internal bad channel count\n"); - exit(2); - } - - else if (color_type & PNG_COLOR_MASK_PALETTE) - { - /* Palette with fixed color: the image rows are all 0 and the image width - * is 16. - */ - memset(row, 0, rowbytes); - } - - else if (colors[0] == channels_of_type(color_type)) - switch (channels_of_type(color_type)) - { - case 1: - { - const png_uint_32 luma = colors[1]; - png_uint_32 x; - - for (x=0; x<=size_max; ++x) - set_value(row, rowbytes, x, bit_depth, luma, gamma_table, - conv); - } - break; - - case 2: - { - const png_uint_32 luma = colors[1]; - const png_uint_32 alpha = colors[2]; - png_uint_32 x; - - for (x=0; x<size_max; ++x) - { - set_value(row, rowbytes, 2*x, bit_depth, luma, gamma_table, - conv); - set_value(row, rowbytes, 2*x+1, bit_depth, alpha, gamma_table, - conv); - } - } - break; - - case 3: - { - const png_uint_32 red = colors[1]; - const png_uint_32 green = colors[2]; - const png_uint_32 blue = colors[3]; - png_uint_32 x; - - for (x=0; x<=size_max; ++x) - { - set_value(row, rowbytes, 3*x+0, bit_depth, red, gamma_table, - conv); - set_value(row, rowbytes, 3*x+1, bit_depth, green, gamma_table, - conv); - set_value(row, rowbytes, 3*x+2, bit_depth, blue, gamma_table, - conv); - } - } - break; - - case 4: - { - const png_uint_32 red = colors[1]; - const png_uint_32 green = colors[2]; - const png_uint_32 blue = colors[3]; - const png_uint_32 alpha = colors[4]; - png_uint_32 x; - - for (x=0; x<=size_max; ++x) - { - set_value(row, rowbytes, 4*x+0, bit_depth, red, gamma_table, - conv); - set_value(row, rowbytes, 4*x+1, bit_depth, green, gamma_table, - conv); - set_value(row, rowbytes, 4*x+2, bit_depth, blue, gamma_table, - conv); - set_value(row, rowbytes, 4*x+3, bit_depth, alpha, gamma_table, - conv); - } - } - break; - - default: - fprintf(stderr, "makepng: internal bad channel count\n"); - exit(2); - } - - else - { - fprintf(stderr, - "makepng: --color: count(%u) does not match channels(%u)\n", - colors[0], channels_of_type(color_type)); - exit(1); - } -} - - -static void PNGCBAPI -makepng_warning(png_structp png_ptr, png_const_charp message) -{ - const char **ep = png_get_error_ptr(png_ptr); - const char *name; - - if (ep != NULL && *ep != NULL) - name = *ep; - - else - name = "makepng"; - - fprintf(stderr, "%s: warning: %s\n", name, message); -} - -static void PNGCBAPI -makepng_error(png_structp png_ptr, png_const_charp message) -{ - makepng_warning(png_ptr, message); - png_longjmp(png_ptr, 1); -} - -static int /* 0 on success, else an error code */ -write_png(const char **name, FILE *fp, int color_type, int bit_depth, - volatile png_fixed_point gamma, chunk_insert * volatile insert, - unsigned int filters, unsigned int *colors) -{ - png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, - name, makepng_error, makepng_warning); - volatile png_infop info_ptr = NULL; - volatile png_bytep row = NULL; - - if (png_ptr == NULL) - { - fprintf(stderr, "makepng: OOM allocating write structure\n"); - return 1; - } - - if (setjmp(png_jmpbuf(png_ptr))) - { - png_structp nv_ptr = png_ptr; - png_infop nv_info = info_ptr; - - png_ptr = NULL; - info_ptr = NULL; - png_destroy_write_struct(&nv_ptr, &nv_info); - if (row != NULL) free(row); - return 1; - } - - /* Allow benign errors so that we can write PNGs with errors */ - png_set_benign_errors(png_ptr, 1/*allowed*/); - 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"); - - { - unsigned int size = image_size_of_type(color_type, bit_depth, colors); - png_fixed_point real_gamma = 45455; /* For sRGB */ - png_byte gamma_table[256]; - double conv; - - /* This function uses the libpng values used on read to carry extra - * information about the gamma: - */ - if (gamma == PNG_GAMMA_MAC_18) - gamma = 65909; - - else if (gamma > 0 && gamma < 1000) - gamma = PNG_FP_1; - - if (gamma > 0) - real_gamma = gamma; - - { - unsigned int i; - - if (real_gamma == 45455) for (i=0; i<256; ++i) - { - gamma_table[i] = (png_byte)i; - conv = 1.; - } - - else - { - /* Convert 'i' from sRGB (45455) to real_gamma, this makes - * the images look the same regardless of the gAMA chunk. - */ - conv = real_gamma; - conv /= 45455; - - gamma_table[0] = 0; - - for (i=1; i<255; ++i) - gamma_table[i] = (png_byte)floor(pow(i/255.,conv) * 255 + .5); - - gamma_table[255] = 255; - } - } - - png_set_IHDR(png_ptr, info_ptr, size, size, bit_depth, color_type, - PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); - - if (color_type & PNG_COLOR_MASK_PALETTE) - { - int npalette; - png_color palette[256]; - png_byte trans[256]; - - npalette = generate_palette(palette, trans, bit_depth, gamma_table, - colors); - png_set_PLTE(png_ptr, info_ptr, palette, npalette); - png_set_tRNS(png_ptr, info_ptr, trans, npalette-1, - NULL/*transparent color*/); - - /* Reset gamma_table to prevent the image rows being changed */ - for (npalette=0; npalette<256; ++npalette) - gamma_table[npalette] = (png_byte)npalette; - } - - if (gamma == PNG_DEFAULT_sRGB) - png_set_sRGB(png_ptr, info_ptr, PNG_sRGB_INTENT_ABSOLUTE); - - else if (gamma > 0) /* Else don't set color space information */ - { - png_set_gAMA_fixed(png_ptr, info_ptr, real_gamma); - - /* Just use the sRGB values here. */ - png_set_cHRM_fixed(png_ptr, info_ptr, - /* color x y */ - /* white */ 31270, 32900, - /* red */ 64000, 33000, - /* green */ 30000, 60000, - /* blue */ 15000, 6000 - ); - } - - /* Insert extra information. */ - while (insert != NULL) - { - insert->insert(png_ptr, info_ptr, insert->nparams, insert->parameters); - insert = insert->next; - } - - /* Write the file header. */ - png_write_info(png_ptr, info_ptr); - - /* Restrict the filters */ - png_set_filter(png_ptr, PNG_FILTER_TYPE_BASE, filters); - - { - int passes = png_set_interlace_handling(png_ptr); - int pass; - png_size_t rowbytes = png_get_rowbytes(png_ptr, info_ptr); - - row = malloc(rowbytes); - - if (row == NULL) - png_error(png_ptr, "OOM allocating row buffer"); - - for (pass = 0; pass < passes; ++pass) - { - unsigned int y; - - for (y=0; y<size; ++y) - { - generate_row(row, rowbytes, y, color_type, bit_depth, - gamma_table, conv, colors); - png_write_row(png_ptr, row); - } - } - } - } - - /* Finish writing the file. */ - png_write_end(png_ptr, info_ptr); - - { - png_structp nv_ptr = png_ptr; - png_infop nv_info = info_ptr; - - png_ptr = NULL; - info_ptr = NULL; - png_destroy_write_struct(&nv_ptr, &nv_info); - } - free(row); - return 0; -} - - -static size_t -load_file(png_const_charp name, png_bytepp result) -{ - FILE *fp = tmpfile(); - - if (fp != NULL) - { - FILE *ip = fopen(name, "rb"); - - if (ip != NULL) - { - size_t total = 0; - int ch; - - for (;;) - { - ch = getc(ip); - if (ch == EOF) break; - putc(ch, fp); - ++total; - } - - if (ferror(ip)) - { - perror(name); - fprintf(stderr, "%s: read error\n", name); - (void)fclose(ip); - } - - else - { - (void)fclose(ip); - - if (ferror(fp)) - { - perror("temporary file"); - fprintf(stderr, "temporary file write error\n"); - } - - else - { - rewind(fp); - - if (total > 0) - { - /* Round up to a multiple of 4 here to allow an iCCP profile - * to be padded to a 4x boundary. - */ - png_bytep data = malloc((total+3)&~3); - - if (data != NULL) - { - size_t new_size = 0; - - for (;;) - { - ch = getc(fp); - if (ch == EOF) break; - data[new_size++] = (png_byte)ch; - } - - if (ferror(fp) || new_size != total) - { - perror("temporary file"); - fprintf(stderr, "temporary file read error\n"); - free(data); - } - - else - { - (void)fclose(fp); - *result = data; - return total; - } - } - - else - fprintf(stderr, "%s: out of memory loading file\n", name); - } - - else - fprintf(stderr, "%s: empty file\n", name); - } - } - } - - else - { - perror(name); - fprintf(stderr, "%s: open failed\n", name); - } - - fclose(fp); - } - - else - fprintf(stderr, "makepng: %s: could not open temporary file\n", name); - - exit(1); - return 0; -} - -static png_size_t -load_fake(png_charp param, png_bytepp profile) -{ - char *endptr = NULL; - unsigned long long int size = strtoull(param, &endptr, 0/*base*/); - - /* The 'fake' format is <number>*[string] */ - if (endptr != NULL && *endptr == '*') - { - size_t len = strlen(++endptr); - size_t result = (size_t)size; - - if (len == 0) len = 1; /* capture the terminating '\0' */ - - /* Now repeat that string to fill 'size' bytes. */ - if (result == size && (*profile = malloc(result)) != NULL) - { - png_bytep out = *profile; - - if (len == 1) - memset(out, *endptr, result); - - else - { - while (size >= len) - { - memcpy(out, endptr, len); - out += len; - size -= len; - } - memcpy(out, endptr, size); - } - - return result; - } - - else - { - fprintf(stderr, "%s: size exceeds system limits\n", param); - exit(1); - } - } - - return 0; -} - -static void -check_param_count(int nparams, int expect) -{ - if (nparams != expect) - { - fprintf(stderr, "bad parameter count (internal error)\n"); - exit(1); - } -} - -static void -insert_iCCP(png_structp png_ptr, png_infop info_ptr, int nparams, - png_charpp params) -{ - png_bytep profile = NULL; - png_uint_32 proflen = 0; - int result; - - check_param_count(nparams, 2); - - switch (params[1][0]) - { - case '<': - { - png_size_t filelen = load_file(params[1]+1, &profile); - if (filelen > 0xfffffffc) /* Maximum profile length */ - { - fprintf(stderr, "%s: file too long (%lu) for an ICC profile\n", - params[1]+1, (unsigned long)filelen); - exit(1); - } - - proflen = (png_uint_32)filelen; - } - break; - - case '0': case '1': case '2': case '3': case '4': - case '5': case '6': case '7': case '8': case '9': - { - png_size_t fake_len = load_fake(params[1], &profile); - - if (fake_len > 0) /* else a simple parameter */ - { - if (fake_len > 0xffffffff) /* Maximum profile length */ - { - fprintf(stderr, - "%s: fake data too long (%lu) for an ICC profile\n", - params[1], (unsigned long)fake_len); - exit(1); - } - proflen = (png_uint_32)(fake_len & ~3U); - /* Always fix up the profile length. */ - png_save_uint_32(profile, proflen); - break; - } - } - - default: - fprintf(stderr, "--insert iCCP \"%s\": unrecognized\n", params[1]); - fprintf(stderr, " use '<' to read a file: \"<filename\"\n"); - exit(1); - } - - result = 1; - - if (proflen & 3) - { - fprintf(stderr, - "makepng: --insert iCCP %s: profile length made a multiple of 4\n", - params[1]); - - /* load_file allocates extra space for this padding, the ICC spec requires - * padding with zero bytes. - */ - while (proflen & 3) - profile[proflen++] = 0; - } - - if (profile != NULL && proflen > 3) - { - png_uint_32 prof_header = png_get_uint_32(profile); - - if (prof_header != proflen) - { - fprintf(stderr, "--insert iCCP %s: profile length field wrong:\n", - params[1]); - fprintf(stderr, " actual %lu, recorded value %lu (corrected)\n", - (unsigned long)proflen, (unsigned long)prof_header); - png_save_uint_32(profile, proflen); - } - } - - if (result && profile != NULL && proflen >=4) - png_set_iCCP(png_ptr, info_ptr, params[0], PNG_COMPRESSION_TYPE_BASE, - profile, proflen); - - if (profile) - free(profile); - - if (!result) - exit(1); -} - -static void -clear_text(png_text *text, png_charp keyword) -{ - text->compression = -1; /* none */ - text->key = keyword; - text->text = NULL; - text->text_length = 0; /* libpng calculates this */ - text->itxt_length = 0; /* libpng calculates this */ - text->lang = NULL; - text->lang_key = NULL; -} - -static void -set_text(png_structp png_ptr, png_infop info_ptr, png_textp text, - png_charp param) -{ - switch (param[0]) - { - case '<': - { - png_bytep file = NULL; - - text->text_length = load_file(param+1, &file); - text->text = (png_charp)file; - } - break; - - case '0': case '1': case '2': case '3': case '4': - case '5': case '6': case '7': case '8': case '9': - { - png_bytep data = NULL; - png_size_t fake_len = load_fake(param, &data); - - if (fake_len > 0) /* else a simple parameter */ - { - text->text_length = fake_len; - text->text = (png_charp)data; - break; - } - } - - default: - text->text = param; - break; - } - - png_set_text(png_ptr, info_ptr, text, 1); - - if (text->text != param) - free(text->text); -} - -static void -insert_tEXt(png_structp png_ptr, png_infop info_ptr, int nparams, - png_charpp params) -{ - png_text text; - - check_param_count(nparams, 2); - clear_text(&text, params[0]); - set_text(png_ptr, info_ptr, &text, params[1]); -} - -static void -insert_zTXt(png_structp png_ptr, png_infop info_ptr, int nparams, - png_charpp params) -{ - png_text text; - - check_param_count(nparams, 2); - clear_text(&text, params[0]); - text.compression = 0; /* deflate */ - set_text(png_ptr, info_ptr, &text, params[1]); -} - -static void -insert_iTXt(png_structp png_ptr, png_infop info_ptr, int nparams, - png_charpp params) -{ - png_text text; - - check_param_count(nparams, 4); - clear_text(&text, params[0]); - text.compression = 2; /* iTXt + deflate */ - text.lang = params[1];/* language tag */ - text.lang_key = params[2]; /* translated keyword */ - set_text(png_ptr, info_ptr, &text, params[3]); -} - -static void -insert_hIST(png_structp png_ptr, png_infop info_ptr, int nparams, png_charpp params) -{ - int i; - png_uint_16 freq[256]; - - /* libpng takes the count from the PLTE count; we don't check it here but we - * do set the array to 0 for unspecified entries. - */ - memset(freq, 0, sizeof freq); - for (i=0; i<nparams; ++i) - { - char *endptr = NULL; - unsigned long int l = strtoul(params[i], &endptr, 0/*base*/); - - if (params[i][0] && *endptr == 0 && l <= 65535) - freq[i] = (png_uint_16)l; - - else - { - fprintf(stderr, "hIST[%d]: %s: invalid frequency\n", i, params[i]); - exit(1); - } - } - - png_set_hIST(png_ptr, info_ptr, freq); -} - -#if 0 -static void -insert_sPLT(png_structp png_ptr, png_infop info_ptr, int nparams, png_charpp params) -{ - fprintf(stderr, "insert sPLT: NYI\n"); -} -#endif - -static int -find_parameters(png_const_charp what, png_charp param, png_charp *list, - int nparams) -{ - /* Parameters are separated by '\n' or ':' characters, up to nparams are - * accepted (more is an error) and the number found is returned. - */ - int i; - for (i=0; *param && i<nparams; ++i) - { - list[i] = param; - while (*++param) if (*param == '\n' || *param == ':') - { - *param++ = 0; /* Terminate last parameter */ - break; /* And start a new one. */ - } - } - - if (*param) - { - fprintf(stderr, "--insert %s: too many parameters (%s)\n", what, param); - exit(1); - } - - list[i] = NULL; /* terminates list */ - return i; /* number of parameters filled in */ -} - -static void -bad_parameter_count(png_const_charp what, int nparams) -{ - fprintf(stderr, "--insert %s: bad parameter count %d\n", what, nparams); - exit(1); -} - -static chunk_insert * -make_insert(png_const_charp what, - void (*insert)(png_structp, png_infop, int, png_charpp), - int nparams, png_charpp list) -{ - int i; - chunk_insert *cip; - - cip = malloc(offsetof(chunk_insert,parameters) + - nparams * sizeof (png_charp)); - - if (cip == NULL) - { - fprintf(stderr, "--insert %s: out of memory allocating %d parameters\n", - what, nparams); - exit(1); - } - - cip->next = NULL; - cip->insert = insert; - cip->nparams = nparams; - for (i=0; i<nparams; ++i) - cip->parameters[i] = list[i]; - - return cip; -} - -static chunk_insert * -find_insert(png_const_charp what, png_charp param) -{ - png_uint_32 chunk = 0; - png_charp parameter_list[1024]; - int i, nparams; - - /* Assemble the chunk name */ - for (i=0; i<4; ++i) - { - char ch = what[i]; - - if ((ch >= 65 && ch <= 90) || (ch >= 97 && ch <= 122)) - chunk = (chunk << 8) + what[i]; - - else - break; - } - - if (i < 4 || what[4] != 0) - { - fprintf(stderr, "makepng --insert \"%s\": invalid chunk name\n", what); - exit(1); - } - - /* Assemble the parameter list. */ - nparams = find_parameters(what, param, parameter_list, 1024); - -# define CHUNK(a,b,c,d) (((a)<<24)+((b)<<16)+((c)<<8)+(d)) - - switch (chunk) - { - case CHUNK(105,67,67,80): /* iCCP */ - if (nparams == 2) - return make_insert(what, insert_iCCP, nparams, parameter_list); - break; - - case CHUNK(116,69,88,116): /* tEXt */ - if (nparams == 2) - return make_insert(what, insert_tEXt, nparams, parameter_list); - break; - - case CHUNK(122,84,88,116): /* zTXt */ - if (nparams == 2) - return make_insert(what, insert_zTXt, nparams, parameter_list); - break; - - case CHUNK(105,84,88,116): /* iTXt */ - if (nparams == 4) - return make_insert(what, insert_iTXt, nparams, parameter_list); - break; - - case CHUNK(104,73,83,84): /* hIST */ - if (nparams <= 256) - return make_insert(what, insert_hIST, nparams, parameter_list); - break; - -#if 0 - case CHUNK(115,80,76,84): /* sPLT */ - return make_insert(what, insert_sPLT, nparams, parameter_list); -#endif - - default: - fprintf(stderr, "makepng --insert \"%s\": unrecognized chunk name\n", - what); - exit(1); - } - - bad_parameter_count(what, nparams); - return NULL; -} - -/* This is a not-very-good parser for a sequence of numbers (including 0). It - * doesn't accept some apparently valid things, but it accepts all the sensible - * combinations. - */ -static void -parse_color(char *arg, unsigned int *colors) -{ - unsigned int ncolors = 0; - - while (*arg && ncolors < 4) - { - char *ep = arg; - - unsigned long ul = strtoul(arg, &ep, 0); - - if (ul > 65535) - { - fprintf(stderr, "makepng --color=...'%s': too big\n", arg); - exit(1); - } - - if (ep == arg) - { - fprintf(stderr, "makepng --color=...'%s': not a valid color\n", arg); - exit(1); - } - - if (*ep) ++ep; /* skip a separator */ - arg = ep; - - colors[++ncolors] = (unsigned int)ul; /* checked above */ - } - - if (*arg) - { - fprintf(stderr, "makepng --color=...'%s': too many values\n", arg); - exit(1); - } - - *colors = ncolors; -} - -int -main(int argc, char **argv) -{ - FILE *fp = stdout; - const char *file_name = NULL; - int color_type = 8; /* invalid */ - int bit_depth = 32; /* invalid */ - unsigned int colors[5]; - unsigned int filters = PNG_ALL_FILTERS; - png_fixed_point gamma = 0; /* not set */ - chunk_insert *head_insert = NULL; - chunk_insert **insert_ptr = &head_insert; - - memset(colors, 0, sizeof colors); - - while (--argc > 0) - { - char *arg = *++argv; - - if (strcmp(arg, "--sRGB") == 0) - { - gamma = PNG_DEFAULT_sRGB; - continue; - } - - if (strcmp(arg, "--linear") == 0) - { - gamma = PNG_FP_1; - continue; - } - - if (strcmp(arg, "--1.8") == 0) - { - gamma = PNG_GAMMA_MAC_18; - continue; - } - - if (strcmp(arg, "--nofilters") == 0) - { - filters = PNG_FILTER_NONE; - continue; - } - - if (strncmp(arg, "--color=", 8) == 0) - { - parse_color(arg+8, colors); - continue; - } - - if (argc >= 3 && strcmp(arg, "--insert") == 0) - { - png_const_charp what = *++argv; - png_charp param = *++argv; - chunk_insert *new_insert; - - argc -= 2; - - new_insert = find_insert(what, param); - - if (new_insert != NULL) - { - *insert_ptr = new_insert; - insert_ptr = &new_insert->next; - } - - continue; - } - - if (arg[0] == '-') - { - fprintf(stderr, "makepng: %s: invalid option\n", arg); - exit(1); - } - - if (strcmp(arg, "palette") == 0) - { - color_type = PNG_COLOR_TYPE_PALETTE; - continue; - } - - if (strncmp(arg, "gray", 4) == 0) - { - if (arg[4] == 0) - { - color_type = PNG_COLOR_TYPE_GRAY; - continue; - } - - else if (strcmp(arg+4, "a") == 0 || - strcmp(arg+4, "alpha") == 0 || - strcmp(arg+4, "-alpha") == 0) - { - color_type = PNG_COLOR_TYPE_GRAY_ALPHA; - continue; - } - } - - if (strncmp(arg, "rgb", 3) == 0) - { - if (arg[3] == 0) - { - color_type = PNG_COLOR_TYPE_RGB; - continue; - } - - else if (strcmp(arg+3, "a") == 0 || - strcmp(arg+3, "alpha") == 0 || - strcmp(arg+3, "-alpha") == 0) - { - color_type = PNG_COLOR_TYPE_RGB_ALPHA; - continue; - } - } - - if (color_type == 8 && isdigit(arg[0])) - { - color_type = atoi(arg); - if (color_type < 0 || color_type > 6 || color_type == 1 || - color_type == 5) - { - fprintf(stderr, "makepng: %s: not a valid color type\n", arg); - exit(1); - } - - continue; - } - - if (bit_depth == 32 && isdigit(arg[0])) - { - bit_depth = atoi(arg); - if (bit_depth <= 0 || bit_depth > 16 || - (bit_depth & -bit_depth) != bit_depth) - { - fprintf(stderr, "makepng: %s: not a valid bit depth\n", arg); - exit(1); - } - - continue; - } - - if (argc == 1) /* It's the file name */ - { - fp = fopen(arg, "wb"); - if (fp == NULL) - { - fprintf(stderr, "%s: %s: could not open\n", arg, strerror(errno)); - exit(1); - } - - file_name = arg; - continue; - } - - fprintf(stderr, "makepng: %s: unknown argument\n", arg); - exit(1); - } /* argument while loop */ - - if (color_type == 8 || bit_depth == 32) - { - fprintf(stderr, "usage: makepng [--sRGB|--linear|--1.8] " - "[--color=...] color-type bit-depth [file-name]\n" - " Make a test PNG file, by default writes to stdout.\n"); - exit(1); - } - - /* Check the colors */ - { - const unsigned int lim = (color_type == PNG_COLOR_TYPE_PALETTE ? 255U : - (1U<<bit_depth)-1); - unsigned int i; - - for (i=1; i<=colors[0]; ++i) - if (colors[i] > lim) - { - fprintf(stderr, "makepng: --color=...: %u out of range [0..%u]\n", - colors[i], lim); - exit(1); - } - } - - /* Restrict the filters for more speed to those we know are used for the - * generated images. - */ - if (filters == PNG_ALL_FILTERS) - { - if ((color_type & PNG_COLOR_MASK_PALETTE) != 0 || bit_depth < 8) - filters = PNG_FILTER_NONE; - - else if (color_type & PNG_COLOR_MASK_COLOR) /* rgb */ - { - if (bit_depth == 8) - filters &= ~(PNG_FILTER_NONE | PNG_FILTER_AVG); - - else - filters = PNG_FILTER_SUB | PNG_FILTER_PAETH; - } - - else /* gray 8 or 16-bit */ - filters &= ~PNG_FILTER_NONE; - } - - { - int ret = write_png(&file_name, fp, color_type, bit_depth, gamma, - head_insert, filters, colors); - - if (ret != 0 && file_name != NULL) - remove(file_name); - - return ret; - } -} |