diff options
Diffstat (limited to 'contrib/syslinux-4.02/com32/lib/libpng/pngset.c')
| -rw-r--r-- | contrib/syslinux-4.02/com32/lib/libpng/pngset.c | 1226 |
1 files changed, 1226 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/com32/lib/libpng/pngset.c b/contrib/syslinux-4.02/com32/lib/libpng/pngset.c new file mode 100644 index 0000000..717757f --- /dev/null +++ b/contrib/syslinux-4.02/com32/lib/libpng/pngset.c @@ -0,0 +1,1226 @@ + +/* pngset.c - storage of image information into info struct + * + * Last changed in libpng 1.2.43 [February 25, 2010] + * Copyright (c) 1998-2010 Glenn Randers-Pehrson + * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) + * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + * + * The functions here are used during reads to store data from the file + * into the info struct, and during writes to store application data + * into the info struct for writing into the file. This abstracts the + * info struct and allows us to change the structure in the future. + */ + +#define PNG_INTERNAL +#define PNG_NO_PEDANTIC_WARNINGS +#include "png.h" +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) + +#ifdef PNG_bKGD_SUPPORTED +void PNGAPI +png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background) +{ + png_debug1(1, "in %s storage function", "bKGD"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16)); + info_ptr->valid |= PNG_INFO_bKGD; +} +#endif + +#ifdef PNG_cHRM_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_cHRM(png_structp png_ptr, png_infop info_ptr, + double white_x, double white_y, double red_x, double red_y, + double green_x, double green_y, double blue_x, double blue_y) +{ + png_debug1(1, "in %s storage function", "cHRM"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + info_ptr->x_white = (float)white_x; + info_ptr->y_white = (float)white_y; + info_ptr->x_red = (float)red_x; + info_ptr->y_red = (float)red_y; + info_ptr->x_green = (float)green_x; + info_ptr->y_green = (float)green_y; + info_ptr->x_blue = (float)blue_x; + info_ptr->y_blue = (float)blue_y; +#ifdef PNG_FIXED_POINT_SUPPORTED + info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5); + info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5); + info_ptr->int_x_red = (png_fixed_point)( red_x*100000.+0.5); + info_ptr->int_y_red = (png_fixed_point)( red_y*100000.+0.5); + info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5); + info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5); + info_ptr->int_x_blue = (png_fixed_point)( blue_x*100000.+0.5); + info_ptr->int_y_blue = (png_fixed_point)( blue_y*100000.+0.5); +#endif + info_ptr->valid |= PNG_INFO_cHRM; +} +#endif /* PNG_FLOATING_POINT_SUPPORTED */ + +#ifdef PNG_FIXED_POINT_SUPPORTED +void PNGAPI +png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr, + png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x, + png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y, + png_fixed_point blue_x, png_fixed_point blue_y) +{ + png_debug1(1, "in %s storage function", "cHRM fixed"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + +#ifdef PNG_CHECK_cHRM_SUPPORTED + if (png_check_cHRM_fixed(png_ptr, + white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y)) +#endif + { + info_ptr->int_x_white = white_x; + info_ptr->int_y_white = white_y; + info_ptr->int_x_red = red_x; + info_ptr->int_y_red = red_y; + info_ptr->int_x_green = green_x; + info_ptr->int_y_green = green_y; + info_ptr->int_x_blue = blue_x; + info_ptr->int_y_blue = blue_y; +#ifdef PNG_FLOATING_POINT_SUPPORTED + info_ptr->x_white = (float)(white_x/100000.); + info_ptr->y_white = (float)(white_y/100000.); + info_ptr->x_red = (float)( red_x/100000.); + info_ptr->y_red = (float)( red_y/100000.); + info_ptr->x_green = (float)(green_x/100000.); + info_ptr->y_green = (float)(green_y/100000.); + info_ptr->x_blue = (float)( blue_x/100000.); + info_ptr->y_blue = (float)( blue_y/100000.); +#endif + info_ptr->valid |= PNG_INFO_cHRM; + } +} +#endif /* PNG_FIXED_POINT_SUPPORTED */ +#endif /* PNG_cHRM_SUPPORTED */ + +#ifdef PNG_gAMA_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma) +{ + double png_gamma; + + png_debug1(1, "in %s storage function", "gAMA"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + /* Check for overflow */ + if (file_gamma > 21474.83) + { + png_warning(png_ptr, "Limiting gamma to 21474.83"); + png_gamma=21474.83; + } + else + png_gamma = file_gamma; + info_ptr->gamma = (float)png_gamma; +#ifdef PNG_FIXED_POINT_SUPPORTED + info_ptr->int_gamma = (int)(png_gamma*100000.+.5); +#endif + info_ptr->valid |= PNG_INFO_gAMA; + if (png_gamma == 0.0) + png_warning(png_ptr, "Setting gamma=0"); +} +#endif +void PNGAPI +png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point + int_gamma) +{ + png_fixed_point png_gamma; + + png_debug1(1, "in %s storage function", "gAMA"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + if (int_gamma > (png_fixed_point)PNG_UINT_31_MAX) + { + png_warning(png_ptr, "Limiting gamma to 21474.83"); + png_gamma=PNG_UINT_31_MAX; + } + else + { + if (int_gamma < 0) + { + png_warning(png_ptr, "Setting negative gamma to zero"); + png_gamma = 0; + } + else + png_gamma = int_gamma; + } +#ifdef PNG_FLOATING_POINT_SUPPORTED + info_ptr->gamma = (float)(png_gamma/100000.); +#endif +#ifdef PNG_FIXED_POINT_SUPPORTED + info_ptr->int_gamma = png_gamma; +#endif + info_ptr->valid |= PNG_INFO_gAMA; + if (png_gamma == 0) + png_warning(png_ptr, "Setting gamma=0"); +} +#endif + +#ifdef PNG_hIST_SUPPORTED +void PNGAPI +png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist) +{ + int i; + + png_debug1(1, "in %s storage function", "hIST"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + if (info_ptr->num_palette == 0 || info_ptr->num_palette + > PNG_MAX_PALETTE_LENGTH) + { + png_warning(png_ptr, + "Invalid palette size, hIST allocation skipped."); + return; + } + +#ifdef PNG_FREE_ME_SUPPORTED + png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0); +#endif + /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in + * version 1.2.1 + */ + png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr, + (png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16))); + if (png_ptr->hist == NULL) + { + png_warning(png_ptr, "Insufficient memory for hIST chunk data."); + return; + } + + for (i = 0; i < info_ptr->num_palette; i++) + png_ptr->hist[i] = hist[i]; + info_ptr->hist = png_ptr->hist; + info_ptr->valid |= PNG_INFO_hIST; + +#ifdef PNG_FREE_ME_SUPPORTED + info_ptr->free_me |= PNG_FREE_HIST; +#else + png_ptr->flags |= PNG_FLAG_FREE_HIST; +#endif +} +#endif + +void PNGAPI +png_set_IHDR(png_structp png_ptr, png_infop info_ptr, + png_uint_32 width, png_uint_32 height, int bit_depth, + int color_type, int interlace_type, int compression_type, + int filter_type) +{ + png_debug1(1, "in %s storage function", "IHDR"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + info_ptr->width = width; + info_ptr->height = height; + info_ptr->bit_depth = (png_byte)bit_depth; + info_ptr->color_type = (png_byte)color_type; + info_ptr->compression_type = (png_byte)compression_type; + info_ptr->filter_type = (png_byte)filter_type; + info_ptr->interlace_type = (png_byte)interlace_type; + + png_check_IHDR (png_ptr, info_ptr->width, info_ptr->height, + info_ptr->bit_depth, info_ptr->color_type, info_ptr->interlace_type, + info_ptr->compression_type, info_ptr->filter_type); + + if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + info_ptr->channels = 1; + else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR) + info_ptr->channels = 3; + else + info_ptr->channels = 1; + if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA) + info_ptr->channels++; + info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth); + + /* Check for potential overflow */ + if (width > (PNG_UINT_32_MAX + >> 3) /* 8-byte RGBA pixels */ + - 64 /* bigrowbuf hack */ + - 1 /* filter byte */ + - 7*8 /* rounding of width to multiple of 8 pixels */ + - 8) /* extra max_pixel_depth pad */ + info_ptr->rowbytes = (png_size_t)0; + else + info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width); +} + +#ifdef PNG_oFFs_SUPPORTED +void PNGAPI +png_set_oFFs(png_structp png_ptr, png_infop info_ptr, + png_int_32 offset_x, png_int_32 offset_y, int unit_type) +{ + png_debug1(1, "in %s storage function", "oFFs"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + info_ptr->x_offset = offset_x; + info_ptr->y_offset = offset_y; + info_ptr->offset_unit_type = (png_byte)unit_type; + info_ptr->valid |= PNG_INFO_oFFs; +} +#endif + +#ifdef PNG_pCAL_SUPPORTED +void PNGAPI +png_set_pCAL(png_structp png_ptr, png_infop info_ptr, + png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams, + png_charp units, png_charpp params) +{ + png_uint_32 length; + int i; + + png_debug1(1, "in %s storage function", "pCAL"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + length = png_strlen(purpose) + 1; + png_debug1(3, "allocating purpose for info (%lu bytes)", + (unsigned long)length); + info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length); + if (info_ptr->pcal_purpose == NULL) + { + png_warning(png_ptr, "Insufficient memory for pCAL purpose."); + return; + } + png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length); + + png_debug(3, "storing X0, X1, type, and nparams in info"); + info_ptr->pcal_X0 = X0; + info_ptr->pcal_X1 = X1; + info_ptr->pcal_type = (png_byte)type; + info_ptr->pcal_nparams = (png_byte)nparams; + + length = png_strlen(units) + 1; + png_debug1(3, "allocating units for info (%lu bytes)", + (unsigned long)length); + info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length); + if (info_ptr->pcal_units == NULL) + { + png_warning(png_ptr, "Insufficient memory for pCAL units."); + return; + } + png_memcpy(info_ptr->pcal_units, units, (png_size_t)length); + + info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr, + (png_uint_32)((nparams + 1) * png_sizeof(png_charp))); + if (info_ptr->pcal_params == NULL) + { + png_warning(png_ptr, "Insufficient memory for pCAL params."); + return; + } + + png_memset(info_ptr->pcal_params, 0, (nparams + 1) * png_sizeof(png_charp)); + + for (i = 0; i < nparams; i++) + { + length = png_strlen(params[i]) + 1; + png_debug2(3, "allocating parameter %d for info (%lu bytes)", i, + (unsigned long)length); + info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length); + if (info_ptr->pcal_params[i] == NULL) + { + png_warning(png_ptr, "Insufficient memory for pCAL parameter."); + return; + } + png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length); + } + + info_ptr->valid |= PNG_INFO_pCAL; +#ifdef PNG_FREE_ME_SUPPORTED + info_ptr->free_me |= PNG_FREE_PCAL; +#endif +} +#endif + +#if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED) +#ifdef PNG_FLOATING_POINT_SUPPORTED +void PNGAPI +png_set_sCAL(png_structp png_ptr, png_infop info_ptr, + int unit, double width, double height) +{ + png_debug1(1, "in %s storage function", "sCAL"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + info_ptr->scal_unit = (png_byte)unit; + info_ptr->scal_pixel_width = width; + info_ptr->scal_pixel_height = height; + + info_ptr->valid |= PNG_INFO_sCAL; +} +#else +#ifdef PNG_FIXED_POINT_SUPPORTED +void PNGAPI +png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr, + int unit, png_charp swidth, png_charp sheight) +{ + png_uint_32 length; + + png_debug1(1, "in %s storage function", "sCAL"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + info_ptr->scal_unit = (png_byte)unit; + + length = png_strlen(swidth) + 1; + png_debug1(3, "allocating unit for info (%u bytes)", + (unsigned int)length); + info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length); + if (info_ptr->scal_s_width == NULL) + { + png_warning(png_ptr, + "Memory allocation failed while processing sCAL."); + return; + } + png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length); + + length = png_strlen(sheight) + 1; + png_debug1(3, "allocating unit for info (%u bytes)", + (unsigned int)length); + info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length); + if (info_ptr->scal_s_height == NULL) + { + png_free (png_ptr, info_ptr->scal_s_width); + info_ptr->scal_s_width = NULL; + png_warning(png_ptr, + "Memory allocation failed while processing sCAL."); + return; + } + png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length); + info_ptr->valid |= PNG_INFO_sCAL; +#ifdef PNG_FREE_ME_SUPPORTED + info_ptr->free_me |= PNG_FREE_SCAL; +#endif +} +#endif +#endif +#endif + +#ifdef PNG_pHYs_SUPPORTED +void PNGAPI +png_set_pHYs(png_structp png_ptr, png_infop info_ptr, + png_uint_32 res_x, png_uint_32 res_y, int unit_type) +{ + png_debug1(1, "in %s storage function", "pHYs"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + info_ptr->x_pixels_per_unit = res_x; + info_ptr->y_pixels_per_unit = res_y; + info_ptr->phys_unit_type = (png_byte)unit_type; + info_ptr->valid |= PNG_INFO_pHYs; +} +#endif + +void PNGAPI +png_set_PLTE(png_structp png_ptr, png_infop info_ptr, + png_colorp palette, int num_palette) +{ + + png_debug1(1, "in %s storage function", "PLTE"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH) + { + if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) + png_error(png_ptr, "Invalid palette length"); + else + { + png_warning(png_ptr, "Invalid palette length"); + return; + } + } + + /* It may not actually be necessary to set png_ptr->palette here; + * we do it for backward compatibility with the way the png_handle_tRNS + * function used to do the allocation. + */ +#ifdef PNG_FREE_ME_SUPPORTED + png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0); +#endif + + /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead + * of num_palette entries, in case of an invalid PNG file that has + * too-large sample values. + */ + png_ptr->palette = (png_colorp)png_calloc(png_ptr, + PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color)); + png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color)); + info_ptr->palette = png_ptr->palette; + info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette; + +#ifdef PNG_FREE_ME_SUPPORTED + info_ptr->free_me |= PNG_FREE_PLTE; +#else + png_ptr->flags |= PNG_FLAG_FREE_PLTE; +#endif + + info_ptr->valid |= PNG_INFO_PLTE; +} + +#ifdef PNG_sBIT_SUPPORTED +void PNGAPI +png_set_sBIT(png_structp png_ptr, png_infop info_ptr, + png_color_8p sig_bit) +{ + png_debug1(1, "in %s storage function", "sBIT"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8)); + info_ptr->valid |= PNG_INFO_sBIT; +} +#endif + +#ifdef PNG_sRGB_SUPPORTED +void PNGAPI +png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent) +{ + png_debug1(1, "in %s storage function", "sRGB"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + info_ptr->srgb_intent = (png_byte)intent; + info_ptr->valid |= PNG_INFO_sRGB; +} + +void PNGAPI +png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr, + int intent) +{ +#ifdef PNG_gAMA_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED + float file_gamma; +#endif +#ifdef PNG_FIXED_POINT_SUPPORTED + png_fixed_point int_file_gamma; +#endif +#endif +#ifdef PNG_cHRM_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED + float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y; +#endif + png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, + int_green_y, int_blue_x, int_blue_y; +#endif + png_debug1(1, "in %s storage function", "sRGB_gAMA_and_cHRM"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + png_set_sRGB(png_ptr, info_ptr, intent); + +#ifdef PNG_gAMA_SUPPORTED +#ifdef PNG_FLOATING_POINT_SUPPORTED + file_gamma = (float).45455; + png_set_gAMA(png_ptr, info_ptr, file_gamma); +#endif +#ifdef PNG_FIXED_POINT_SUPPORTED + int_file_gamma = 45455L; + png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma); +#endif +#endif + +#ifdef PNG_cHRM_SUPPORTED + int_white_x = 31270L; + int_white_y = 32900L; + int_red_x = 64000L; + int_red_y = 33000L; + int_green_x = 30000L; + int_green_y = 60000L; + int_blue_x = 15000L; + int_blue_y = 6000L; + +#ifdef PNG_FLOATING_POINT_SUPPORTED + white_x = (float).3127; + white_y = (float).3290; + red_x = (float).64; + red_y = (float).33; + green_x = (float).30; + green_y = (float).60; + blue_x = (float).15; + blue_y = (float).06; +#endif + +#ifdef PNG_FIXED_POINT_SUPPORTED + png_set_cHRM_fixed(png_ptr, info_ptr, + int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, + int_green_y, int_blue_x, int_blue_y); +#endif +#ifdef PNG_FLOATING_POINT_SUPPORTED + png_set_cHRM(png_ptr, info_ptr, + white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y); +#endif +#endif /* cHRM */ +} +#endif /* sRGB */ + + +#ifdef PNG_iCCP_SUPPORTED +void PNGAPI +png_set_iCCP(png_structp png_ptr, png_infop info_ptr, + png_charp name, int compression_type, + png_charp profile, png_uint_32 proflen) +{ + png_charp new_iccp_name; + png_charp new_iccp_profile; + png_uint_32 length; + + png_debug1(1, "in %s storage function", "iCCP"); + + if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL) + return; + + length = png_strlen(name)+1; + new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length); + if (new_iccp_name == NULL) + { + png_warning(png_ptr, "Insufficient memory to process iCCP chunk."); + return; + } + png_memcpy(new_iccp_name, name, length); + new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen); + if (new_iccp_profile == NULL) + { + png_free (png_ptr, new_iccp_name); + png_warning(png_ptr, + "Insufficient memory to process iCCP profile."); + return; + } + png_memcpy(new_iccp_profile, profile, (png_size_t)proflen); + + png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0); + + info_ptr->iccp_proflen = proflen; + info_ptr->iccp_name = new_iccp_name; + info_ptr->iccp_profile = new_iccp_profile; + /* Compression is always zero but is here so the API and info structure + * does not have to change if we introduce multiple compression types + */ + info_ptr->iccp_compression = (png_byte)compression_type; +#ifdef PNG_FREE_ME_SUPPORTED + info_ptr->free_me |= PNG_FREE_ICCP; +#endif + info_ptr->valid |= PNG_INFO_iCCP; +} +#endif + +#ifdef PNG_TEXT_SUPPORTED +void PNGAPI +png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, + int num_text) +{ + int ret; + ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text); + if (ret) + png_error(png_ptr, "Insufficient memory to store text"); +} + +int /* PRIVATE */ +png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr, + int num_text) +{ + int i; + + png_debug1(1, "in %s storage function", ((png_ptr == NULL || + png_ptr->chunk_name[0] == '\0') ? + "text" : (png_const_charp)png_ptr->chunk_name)); + + if (png_ptr == NULL || info_ptr == NULL || num_text == 0) + return(0); + + /* Make sure we have enough space in the "text" array in info_struct + * to hold all of the incoming text_ptr objects. + */ + if (info_ptr->num_text + num_text > info_ptr->max_text) + { + if (info_ptr->text != NULL) + { + png_textp old_text; + int old_max; + + old_max = info_ptr->max_text; + info_ptr->max_text = info_ptr->num_text + num_text + 8; + old_text = info_ptr->text; + info_ptr->text = (png_textp)png_malloc_warn(png_ptr, + (png_uint_32)(info_ptr->max_text * png_sizeof(png_text))); + if (info_ptr->text == NULL) + { + png_free(png_ptr, old_text); + return(1); + } + png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max * + png_sizeof(png_text))); + png_free(png_ptr, old_text); + } + else + { + info_ptr->max_text = num_text + 8; + info_ptr->num_text = 0; + info_ptr->text = (png_textp)png_malloc_warn(png_ptr, + (png_uint_32)(info_ptr->max_text * png_sizeof(png_text))); + if (info_ptr->text == NULL) + return(1); +#ifdef PNG_FREE_ME_SUPPORTED + info_ptr->free_me |= PNG_FREE_TEXT; +#endif + } + png_debug1(3, "allocated %d entries for info_ptr->text", + info_ptr->max_text); + } + for (i = 0; i < num_text; i++) + { + png_size_t text_length, key_len; + png_size_t lang_len, lang_key_len; + png_textp textp = &(info_ptr->text[info_ptr->num_text]); + + if (text_ptr[i].key == NULL) + continue; + + key_len = png_strlen(text_ptr[i].key); + + if (text_ptr[i].compression <= 0) + { + lang_len = 0; + lang_key_len = 0; + } + + else +#ifdef PNG_iTXt_SUPPORTED + { + /* Set iTXt data */ + + if (text_ptr[i].lang != NULL) + lang_len = png_strlen(text_ptr[i].lang); + else + lang_len = 0; + if (text_ptr[i].lang_key != NULL) + lang_key_len = png_strlen(text_ptr[i].lang_key); + else + lang_key_len = 0; + } +#else /* PNG_iTXt_SUPPORTED */ + { + png_warning(png_ptr, "iTXt chunk not supported."); + continue; + } +#endif + + if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0') + { + text_length = 0; +#ifdef PNG_iTXt_SUPPORTED + if (text_ptr[i].compression > 0) + textp->compression = PNG_ITXT_COMPRESSION_NONE; + else +#endif + textp->compression = PNG_TEXT_COMPRESSION_NONE; + } + + else + { + text_length = png_strlen(text_ptr[i].text); + textp->compression = text_ptr[i].compression; + } + + textp->key = (png_charp)png_malloc_warn(png_ptr, + (png_uint_32) + (key_len + text_length + lang_len + lang_key_len + 4)); + if (textp->key == NULL) + return(1); + png_debug2(2, "Allocated %lu bytes at %x in png_set_text", + (png_uint_32) + (key_len + lang_len + lang_key_len + text_length + 4), + (int)textp->key); + + png_memcpy(textp->key, text_ptr[i].key,(png_size_t)(key_len)); + *(textp->key + key_len) = '\0'; +#ifdef PNG_iTXt_SUPPORTED + if (text_ptr[i].compression > 0) + { + textp->lang = textp->key + key_len + 1; + png_memcpy(textp->lang, text_ptr[i].lang, lang_len); + *(textp->lang + lang_len) = '\0'; + textp->lang_key = textp->lang + lang_len + 1; + png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len); + *(textp->lang_key + lang_key_len) = '\0'; + textp->text = textp->lang_key + lang_key_len + 1; + } + else +#endif + { +#ifdef PNG_iTXt_SUPPORTED + textp->lang=NULL; + textp->lang_key=NULL; +#endif + textp->text = textp->key + key_len + 1; + } + if (text_length) + png_memcpy(textp->text, text_ptr[i].text, + (png_size_t)(text_length)); + *(textp->text + text_length) = '\0'; + +#ifdef PNG_iTXt_SUPPORTED + if (textp->compression > 0) + { + textp->text_length = 0; + textp->itxt_length = text_length; + } + else +#endif + + { + textp->text_length = text_length; +#ifdef PNG_iTXt_SUPPORTED + textp->itxt_length = 0; +#endif + } + info_ptr->num_text++; + png_debug1(3, "transferred text chunk %d", info_ptr->num_text); + } + return(0); +} +#endif + +#ifdef PNG_tIME_SUPPORTED +void PNGAPI +png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time) +{ + png_debug1(1, "in %s storage function", "tIME"); + + if (png_ptr == NULL || info_ptr == NULL || + (png_ptr->mode & PNG_WROTE_tIME)) + return; + + png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time)); + info_ptr->valid |= PNG_INFO_tIME; +} +#endif + +#ifdef PNG_tRNS_SUPPORTED +void PNGAPI +png_set_tRNS(png_structp png_ptr, png_infop info_ptr, + png_bytep trans, int num_trans, png_color_16p trans_values) +{ + png_debug1(1, "in %s storage function", "tRNS"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + if (trans != NULL) + { + /* It may not actually be necessary to set png_ptr->trans here; + * we do it for backward compatibility with the way the png_handle_tRNS + * function used to do the allocation. + */ + +#ifdef PNG_FREE_ME_SUPPORTED + png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0); +#endif + + /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */ + png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr, + (png_uint_32)PNG_MAX_PALETTE_LENGTH); + if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH) + png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans); + } + + if (trans_values != NULL) + { + int sample_max = (1 << info_ptr->bit_depth); + if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY && + (int)trans_values->gray > sample_max) || + (info_ptr->color_type == PNG_COLOR_TYPE_RGB && + ((int)trans_values->red > sample_max || + (int)trans_values->green > sample_max || + (int)trans_values->blue > sample_max))) + png_warning(png_ptr, + "tRNS chunk has out-of-range samples for bit_depth"); + png_memcpy(&(info_ptr->trans_values), trans_values, + png_sizeof(png_color_16)); + if (num_trans == 0) + num_trans = 1; + } + + info_ptr->num_trans = (png_uint_16)num_trans; + if (num_trans != 0) + { + info_ptr->valid |= PNG_INFO_tRNS; +#ifdef PNG_FREE_ME_SUPPORTED + info_ptr->free_me |= PNG_FREE_TRNS; +#else + png_ptr->flags |= PNG_FLAG_FREE_TRNS; +#endif + } +} +#endif + +#ifdef PNG_sPLT_SUPPORTED +void PNGAPI +png_set_sPLT(png_structp png_ptr, + png_infop info_ptr, png_sPLT_tp entries, int nentries) +/* + * entries - array of png_sPLT_t structures + * to be added to the list of palettes + * in the info structure. + * nentries - number of palette structures to be + * added. + */ +{ + png_sPLT_tp np; + int i; + + if (png_ptr == NULL || info_ptr == NULL) + return; + + np = (png_sPLT_tp)png_malloc_warn(png_ptr, + (info_ptr->splt_palettes_num + nentries) * + (png_uint_32)png_sizeof(png_sPLT_t)); + if (np == NULL) + { + png_warning(png_ptr, "No memory for sPLT palettes."); + return; + } + + png_memcpy(np, info_ptr->splt_palettes, + info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t)); + png_free(png_ptr, info_ptr->splt_palettes); + info_ptr->splt_palettes=NULL; + + for (i = 0; i < nentries; i++) + { + png_sPLT_tp to = np + info_ptr->splt_palettes_num + i; + png_sPLT_tp from = entries + i; + png_uint_32 length; + + length = png_strlen(from->name) + 1; + to->name = (png_charp)png_malloc_warn(png_ptr, length); + if (to->name == NULL) + { + png_warning(png_ptr, + "Out of memory while processing sPLT chunk"); + continue; + } + png_memcpy(to->name, from->name, length); + to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr, + (png_uint_32)(from->nentries * png_sizeof(png_sPLT_entry))); + if (to->entries == NULL) + { + png_warning(png_ptr, + "Out of memory while processing sPLT chunk"); + png_free(png_ptr, to->name); + to->name = NULL; + continue; + } + png_memcpy(to->entries, from->entries, + from->nentries * png_sizeof(png_sPLT_entry)); + to->nentries = from->nentries; + to->depth = from->depth; + } + + info_ptr->splt_palettes = np; + info_ptr->splt_palettes_num += nentries; + info_ptr->valid |= PNG_INFO_sPLT; +#ifdef PNG_FREE_ME_SUPPORTED + info_ptr->free_me |= PNG_FREE_SPLT; +#endif +} +#endif /* PNG_sPLT_SUPPORTED */ + +#ifdef PNG_UNKNOWN_CHUNKS_SUPPORTED +void PNGAPI +png_set_unknown_chunks(png_structp png_ptr, + png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns) +{ + png_unknown_chunkp np; + int i; + + if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0) + return; + + np = (png_unknown_chunkp)png_malloc_warn(png_ptr, + (png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) * + png_sizeof(png_unknown_chunk))); + if (np == NULL) + { + png_warning(png_ptr, + "Out of memory while processing unknown chunk."); + return; + } + + png_memcpy(np, info_ptr->unknown_chunks, + info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk)); + png_free(png_ptr, info_ptr->unknown_chunks); + info_ptr->unknown_chunks = NULL; + + for (i = 0; i < num_unknowns; i++) + { + png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i; + png_unknown_chunkp from = unknowns + i; + + png_memcpy((png_charp)to->name, (png_charp)from->name, + png_sizeof(from->name)); + to->name[png_sizeof(to->name)-1] = '\0'; + to->size = from->size; + /* Note our location in the read or write sequence */ + to->location = (png_byte)(png_ptr->mode & 0xff); + + if (from->size == 0) + to->data=NULL; + else + { + to->data = (png_bytep)png_malloc_warn(png_ptr, + (png_uint_32)from->size); + if (to->data == NULL) + { + png_warning(png_ptr, + "Out of memory while processing unknown chunk."); + to->size = 0; + } + else + png_memcpy(to->data, from->data, from->size); + } + } + + info_ptr->unknown_chunks = np; + info_ptr->unknown_chunks_num += num_unknowns; +#ifdef PNG_FREE_ME_SUPPORTED + info_ptr->free_me |= PNG_FREE_UNKN; +#endif +} +void PNGAPI +png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr, + int chunk, int location) +{ + if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk < + (int)info_ptr->unknown_chunks_num) + info_ptr->unknown_chunks[chunk].location = (png_byte)location; +} +#endif + +#if defined(PNG_1_0_X) || defined(PNG_1_2_X) +#if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \ + defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED) +void PNGAPI +png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted) +{ + /* This function is deprecated in favor of png_permit_mng_features() + and will be removed from libpng-1.3.0 */ + + png_debug(1, "in png_permit_empty_plte, DEPRECATED."); + + if (png_ptr == NULL) + return; + png_ptr->mng_features_permitted = (png_byte) + ((png_ptr->mng_features_permitted & (~PNG_FLAG_MNG_EMPTY_PLTE)) | + ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE))); +} +#endif +#endif + +#ifdef PNG_MNG_FEATURES_SUPPORTED +png_uint_32 PNGAPI +png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features) +{ + png_debug(1, "in png_permit_mng_features"); + + if (png_ptr == NULL) + return (png_uint_32)0; + png_ptr->mng_features_permitted = + (png_byte)(mng_features & PNG_ALL_MNG_FEATURES); + return (png_uint_32)png_ptr->mng_features_permitted; +} +#endif + +#ifdef PNG_HANDLE_AS_UNKNOWN_SUPPORTED +void PNGAPI +png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep + chunk_list, int num_chunks) +{ + png_bytep new_list, p; + int i, old_num_chunks; + if (png_ptr == NULL) + return; + if (num_chunks == 0) + { + if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE) + png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS; + else + png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS; + + if (keep == PNG_HANDLE_CHUNK_ALWAYS) + png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS; + else + png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS; + return; + } + if (chunk_list == NULL) + return; + old_num_chunks = png_ptr->num_chunk_list; + new_list=(png_bytep)png_malloc(png_ptr, + (png_uint_32) + (5*(num_chunks + old_num_chunks))); + if (png_ptr->chunk_list != NULL) + { + png_memcpy(new_list, png_ptr->chunk_list, + (png_size_t)(5*old_num_chunks)); + png_free(png_ptr, png_ptr->chunk_list); + png_ptr->chunk_list=NULL; + } + png_memcpy(new_list + 5*old_num_chunks, chunk_list, + (png_size_t)(5*num_chunks)); + for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5) + *p=(png_byte)keep; + png_ptr->num_chunk_list = old_num_chunks + num_chunks; + png_ptr->chunk_list = new_list; +#ifdef PNG_FREE_ME_SUPPORTED + png_ptr->free_me |= PNG_FREE_LIST; +#endif +} +#endif + +#ifdef PNG_READ_USER_CHUNKS_SUPPORTED +void PNGAPI +png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr, + png_user_chunk_ptr read_user_chunk_fn) +{ + png_debug(1, "in png_set_read_user_chunk_fn"); + + if (png_ptr == NULL) + return; + + png_ptr->read_user_chunk_fn = read_user_chunk_fn; + png_ptr->user_chunk_ptr = user_chunk_ptr; +} +#endif + +#ifdef PNG_INFO_IMAGE_SUPPORTED +void PNGAPI +png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers) +{ + png_debug1(1, "in %s storage function", "rows"); + + if (png_ptr == NULL || info_ptr == NULL) + return; + + if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers)) + png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0); + info_ptr->row_pointers = row_pointers; + if (row_pointers) + info_ptr->valid |= PNG_INFO_IDAT; +} +#endif + +void PNGAPI +png_set_compression_buffer_size(png_structp png_ptr, + png_uint_32 size) +{ + if (png_ptr == NULL) + return; + png_free(png_ptr, png_ptr->zbuf); + png_ptr->zbuf_size = (png_size_t)size; + png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size); + png_ptr->zstream.next_out = png_ptr->zbuf; + png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; +} + +void PNGAPI +png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask) +{ + if (png_ptr && info_ptr) + info_ptr->valid &= ~mask; +} + + +#ifndef PNG_1_0_X +#ifdef PNG_ASSEMBLER_CODE_SUPPORTED +/* Function was added to libpng 1.2.0 and should always exist by default */ +void PNGAPI +png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags) +{ +/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */ + if (png_ptr != NULL) + png_ptr->asm_flags = 0; + asm_flags = asm_flags; /* Quiet the compiler */ +} + +/* This function was added to libpng 1.2.0 */ +void PNGAPI +png_set_mmx_thresholds (png_structp png_ptr, + png_byte mmx_bitdepth_threshold, + png_uint_32 mmx_rowbytes_threshold) +{ +/* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */ + if (png_ptr == NULL) + return; + /* Quiet the compiler */ + mmx_bitdepth_threshold = mmx_bitdepth_threshold; + mmx_rowbytes_threshold = mmx_rowbytes_threshold; +} +#endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */ + +#ifdef PNG_SET_USER_LIMITS_SUPPORTED +/* This function was added to libpng 1.2.6 */ +void PNGAPI +png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max, + png_uint_32 user_height_max) +{ + /* Images with dimensions larger than these limits will be + * rejected by png_set_IHDR(). To accept any PNG datastream + * regardless of dimensions, set both limits to 0x7ffffffL. + */ + if (png_ptr == NULL) + return; + png_ptr->user_width_max = user_width_max; + png_ptr->user_height_max = user_height_max; +} +#endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */ + + +#ifdef PNG_BENIGN_ERRORS_SUPPORTED +void PNGAPI +png_set_benign_errors(png_structp png_ptr, int allowed) +{ + png_debug(1, "in png_set_benign_errors"); + + if (allowed) + png_ptr->flags |= PNG_FLAG_BENIGN_ERRORS_WARN; + else + png_ptr->flags &= ~PNG_FLAG_BENIGN_ERRORS_WARN; +} +#endif /* PNG_BENIGN_ERRORS_SUPPORTED */ +#endif /* ?PNG_1_0_X */ +#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */ |