nuclear@2: 
nuclear@2: /* pngset.c - storage of image information into info struct
nuclear@2:  *
nuclear@2:  * Last changed in libpng 1.2.30 [August 15, 2008]
nuclear@2:  * For conditions of distribution and use, see copyright notice in png.h
nuclear@2:  * Copyright (c) 1998-2008 Glenn Randers-Pehrson
nuclear@2:  * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
nuclear@2:  * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
nuclear@2:  *
nuclear@2:  * The functions here are used during reads to store data from the file
nuclear@2:  * into the info struct, and during writes to store application data
nuclear@2:  * into the info struct for writing into the file.  This abstracts the
nuclear@2:  * info struct and allows us to change the structure in the future.
nuclear@2:  */
nuclear@2: 
nuclear@2: #define PNG_INTERNAL
nuclear@2: #include "png.h"
nuclear@2: #if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED)
nuclear@2: 
nuclear@2: #if defined(PNG_bKGD_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_bKGD(png_structp png_ptr, png_infop info_ptr, png_color_16p background)
nuclear@2: {
nuclear@2:    png_debug1(1, "in %s storage function\n", "bKGD");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    png_memcpy(&(info_ptr->background), background, png_sizeof(png_color_16));
nuclear@2:    info_ptr->valid |= PNG_INFO_bKGD;
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_cHRM_SUPPORTED)
nuclear@2: #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@2: void PNGAPI
nuclear@2: png_set_cHRM(png_structp png_ptr, png_infop info_ptr,
nuclear@2:    double white_x, double white_y, double red_x, double red_y,
nuclear@2:    double green_x, double green_y, double blue_x, double blue_y)
nuclear@2: {
nuclear@2:    png_debug1(1, "in %s storage function\n", "cHRM");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2:    if (!(white_x || white_y || red_x || red_y || green_x || green_y ||
nuclear@2:        blue_x || blue_y))
nuclear@2:    {
nuclear@2:       png_warning(png_ptr,
nuclear@2:         "Ignoring attempt to set all-zero chromaticity values");
nuclear@2:       return;
nuclear@2:    }
nuclear@2:    if (white_x < 0.0 || white_y < 0.0 ||
nuclear@2:          red_x < 0.0 ||   red_y < 0.0 ||
nuclear@2:        green_x < 0.0 || green_y < 0.0 ||
nuclear@2:         blue_x < 0.0 ||  blue_y < 0.0)
nuclear@2:    {
nuclear@2:       png_warning(png_ptr,
nuclear@2:         "Ignoring attempt to set negative chromaticity value");
nuclear@2:       return;
nuclear@2:    }
nuclear@2:    if (white_x > 21474.83 || white_y > 21474.83 ||
nuclear@2:          red_x > 21474.83 ||   red_y > 21474.83 ||
nuclear@2:        green_x > 21474.83 || green_y > 21474.83 ||
nuclear@2:         blue_x > 21474.83 ||  blue_y > 21474.83)
nuclear@2:    {
nuclear@2:       png_warning(png_ptr,
nuclear@2:         "Ignoring attempt to set chromaticity value exceeding 21474.83");
nuclear@2:       return;
nuclear@2:    }
nuclear@2: 
nuclear@2:    info_ptr->x_white = (float)white_x;
nuclear@2:    info_ptr->y_white = (float)white_y;
nuclear@2:    info_ptr->x_red   = (float)red_x;
nuclear@2:    info_ptr->y_red   = (float)red_y;
nuclear@2:    info_ptr->x_green = (float)green_x;
nuclear@2:    info_ptr->y_green = (float)green_y;
nuclear@2:    info_ptr->x_blue  = (float)blue_x;
nuclear@2:    info_ptr->y_blue  = (float)blue_y;
nuclear@2: #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@2:    info_ptr->int_x_white = (png_fixed_point)(white_x*100000.+0.5);
nuclear@2:    info_ptr->int_y_white = (png_fixed_point)(white_y*100000.+0.5);
nuclear@2:    info_ptr->int_x_red   = (png_fixed_point)(  red_x*100000.+0.5);
nuclear@2:    info_ptr->int_y_red   = (png_fixed_point)(  red_y*100000.+0.5);
nuclear@2:    info_ptr->int_x_green = (png_fixed_point)(green_x*100000.+0.5);
nuclear@2:    info_ptr->int_y_green = (png_fixed_point)(green_y*100000.+0.5);
nuclear@2:    info_ptr->int_x_blue  = (png_fixed_point)( blue_x*100000.+0.5);
nuclear@2:    info_ptr->int_y_blue  = (png_fixed_point)( blue_y*100000.+0.5);
nuclear@2: #endif
nuclear@2:    info_ptr->valid |= PNG_INFO_cHRM;
nuclear@2: }
nuclear@2: #endif
nuclear@2: #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@2: void PNGAPI
nuclear@2: png_set_cHRM_fixed(png_structp png_ptr, png_infop info_ptr,
nuclear@2:    png_fixed_point white_x, png_fixed_point white_y, png_fixed_point red_x,
nuclear@2:    png_fixed_point red_y, png_fixed_point green_x, png_fixed_point green_y,
nuclear@2:    png_fixed_point blue_x, png_fixed_point blue_y)
nuclear@2: {
nuclear@2:    png_debug1(1, "in %s storage function\n", "cHRM");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    if (!(white_x || white_y || red_x || red_y || green_x || green_y ||
nuclear@2:        blue_x || blue_y))
nuclear@2:    {
nuclear@2:       png_warning(png_ptr,
nuclear@2:         "Ignoring attempt to set all-zero chromaticity values");
nuclear@2:       return;
nuclear@2:    }
nuclear@2:    if (white_x < 0 || white_y < 0 ||
nuclear@2:          red_x < 0 ||   red_y < 0 ||
nuclear@2:        green_x < 0 || green_y < 0 ||
nuclear@2:         blue_x < 0 ||  blue_y < 0)
nuclear@2:    {
nuclear@2:       png_warning(png_ptr,
nuclear@2:         "Ignoring attempt to set negative chromaticity value");
nuclear@2:       return;
nuclear@2:    }
nuclear@2:    if (white_x > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@2:        white_y > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@2:          red_x > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@2:          red_y > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@2:        green_x > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@2:        green_y > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@2:         blue_x > (png_fixed_point) PNG_UINT_31_MAX ||
nuclear@2:         blue_y > (png_fixed_point) PNG_UINT_31_MAX )
nuclear@2:    {
nuclear@2:       png_warning(png_ptr,
nuclear@2:         "Ignoring attempt to set chromaticity value exceeding 21474.83");
nuclear@2:       return;
nuclear@2:    }
nuclear@2:    info_ptr->int_x_white = white_x;
nuclear@2:    info_ptr->int_y_white = white_y;
nuclear@2:    info_ptr->int_x_red   = red_x;
nuclear@2:    info_ptr->int_y_red   = red_y;
nuclear@2:    info_ptr->int_x_green = green_x;
nuclear@2:    info_ptr->int_y_green = green_y;
nuclear@2:    info_ptr->int_x_blue  = blue_x;
nuclear@2:    info_ptr->int_y_blue  = blue_y;
nuclear@2: #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@2:    info_ptr->x_white = (float)(white_x/100000.);
nuclear@2:    info_ptr->y_white = (float)(white_y/100000.);
nuclear@2:    info_ptr->x_red   = (float)(  red_x/100000.);
nuclear@2:    info_ptr->y_red   = (float)(  red_y/100000.);
nuclear@2:    info_ptr->x_green = (float)(green_x/100000.);
nuclear@2:    info_ptr->y_green = (float)(green_y/100000.);
nuclear@2:    info_ptr->x_blue  = (float)( blue_x/100000.);
nuclear@2:    info_ptr->y_blue  = (float)( blue_y/100000.);
nuclear@2: #endif
nuclear@2:    info_ptr->valid |= PNG_INFO_cHRM;
nuclear@2: }
nuclear@2: #endif
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_gAMA_SUPPORTED)
nuclear@2: #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@2: void PNGAPI
nuclear@2: png_set_gAMA(png_structp png_ptr, png_infop info_ptr, double file_gamma)
nuclear@2: {
nuclear@2:    double gamma;
nuclear@2:    png_debug1(1, "in %s storage function\n", "gAMA");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    /* Check for overflow */
nuclear@2:    if (file_gamma > 21474.83)
nuclear@2:    {
nuclear@2:       png_warning(png_ptr, "Limiting gamma to 21474.83");
nuclear@2:       gamma=21474.83;
nuclear@2:    }
nuclear@2:    else
nuclear@2:       gamma = file_gamma;
nuclear@2:    info_ptr->gamma = (float)gamma;
nuclear@2: #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@2:    info_ptr->int_gamma = (int)(gamma*100000.+.5);
nuclear@2: #endif
nuclear@2:    info_ptr->valid |= PNG_INFO_gAMA;
nuclear@2:    if (gamma == 0.0)
nuclear@2:       png_warning(png_ptr, "Setting gamma=0");
nuclear@2: }
nuclear@2: #endif
nuclear@2: void PNGAPI
nuclear@2: png_set_gAMA_fixed(png_structp png_ptr, png_infop info_ptr, png_fixed_point
nuclear@2:    int_gamma)
nuclear@2: {
nuclear@2:    png_fixed_point gamma;
nuclear@2: 
nuclear@2:    png_debug1(1, "in %s storage function\n", "gAMA");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    if (int_gamma > (png_fixed_point) PNG_UINT_31_MAX)
nuclear@2:    {
nuclear@2:      png_warning(png_ptr, "Limiting gamma to 21474.83");
nuclear@2:      gamma=PNG_UINT_31_MAX;
nuclear@2:    }
nuclear@2:    else
nuclear@2:    {
nuclear@2:      if (int_gamma < 0)
nuclear@2:      {
nuclear@2:        png_warning(png_ptr, "Setting negative gamma to zero");
nuclear@2:        gamma = 0;
nuclear@2:      }
nuclear@2:      else
nuclear@2:        gamma = int_gamma;
nuclear@2:    }
nuclear@2: #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@2:    info_ptr->gamma = (float)(gamma/100000.);
nuclear@2: #endif
nuclear@2: #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@2:    info_ptr->int_gamma = gamma;
nuclear@2: #endif
nuclear@2:    info_ptr->valid |= PNG_INFO_gAMA;
nuclear@2:    if (gamma == 0)
nuclear@2:       png_warning(png_ptr, "Setting gamma=0");
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_hIST_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_hIST(png_structp png_ptr, png_infop info_ptr, png_uint_16p hist)
nuclear@2: {
nuclear@2:    int i;
nuclear@2: 
nuclear@2:    png_debug1(1, "in %s storage function\n", "hIST");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2:    if (info_ptr->num_palette == 0 || info_ptr->num_palette
nuclear@2:        > PNG_MAX_PALETTE_LENGTH)
nuclear@2:    {
nuclear@2:        png_warning(png_ptr,
nuclear@2:           "Invalid palette size, hIST allocation skipped.");
nuclear@2:        return;
nuclear@2:    }
nuclear@2: 
nuclear@2: #ifdef PNG_FREE_ME_SUPPORTED
nuclear@2:    png_free_data(png_ptr, info_ptr, PNG_FREE_HIST, 0);
nuclear@2: #endif
nuclear@2:    /* Changed from info->num_palette to PNG_MAX_PALETTE_LENGTH in version
nuclear@2:       1.2.1 */
nuclear@2:    png_ptr->hist = (png_uint_16p)png_malloc_warn(png_ptr,
nuclear@2:       (png_uint_32)(PNG_MAX_PALETTE_LENGTH * png_sizeof(png_uint_16)));
nuclear@2:    if (png_ptr->hist == NULL)
nuclear@2:      {
nuclear@2:        png_warning(png_ptr, "Insufficient memory for hIST chunk data.");
nuclear@2:        return;
nuclear@2:      }
nuclear@2: 
nuclear@2:    for (i = 0; i < info_ptr->num_palette; i++)
nuclear@2:        png_ptr->hist[i] = hist[i];
nuclear@2:    info_ptr->hist = png_ptr->hist;
nuclear@2:    info_ptr->valid |= PNG_INFO_hIST;
nuclear@2: 
nuclear@2: #ifdef PNG_FREE_ME_SUPPORTED
nuclear@2:    info_ptr->free_me |= PNG_FREE_HIST;
nuclear@2: #else
nuclear@2:    png_ptr->flags |= PNG_FLAG_FREE_HIST;
nuclear@2: #endif
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: void PNGAPI
nuclear@2: png_set_IHDR(png_structp png_ptr, png_infop info_ptr,
nuclear@2:    png_uint_32 width, png_uint_32 height, int bit_depth,
nuclear@2:    int color_type, int interlace_type, int compression_type,
nuclear@2:    int filter_type)
nuclear@2: {
nuclear@2:    png_debug1(1, "in %s storage function\n", "IHDR");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    /* check for width and height valid values */
nuclear@2:    if (width == 0 || height == 0)
nuclear@2:       png_error(png_ptr, "Image width or height is zero in IHDR");
nuclear@2: #ifdef PNG_SET_USER_LIMITS_SUPPORTED
nuclear@2:    if (width > png_ptr->user_width_max || height > png_ptr->user_height_max)
nuclear@2:       png_error(png_ptr, "image size exceeds user limits in IHDR");
nuclear@2: #else
nuclear@2:    if (width > PNG_USER_WIDTH_MAX || height > PNG_USER_HEIGHT_MAX)
nuclear@2:       png_error(png_ptr, "image size exceeds user limits in IHDR");
nuclear@2: #endif
nuclear@2:    if (width > PNG_UINT_31_MAX || height > PNG_UINT_31_MAX)
nuclear@2:       png_error(png_ptr, "Invalid image size in IHDR");
nuclear@2:    if ( width > (PNG_UINT_32_MAX
nuclear@2:                  >> 3)      /* 8-byte RGBA pixels */
nuclear@2:                  - 64       /* bigrowbuf hack */
nuclear@2:                  - 1        /* filter byte */
nuclear@2:                  - 7*8      /* rounding of width to multiple of 8 pixels */
nuclear@2:                  - 8)       /* extra max_pixel_depth pad */
nuclear@2:       png_warning(png_ptr, "Width is too large for libpng to process pixels");
nuclear@2: 
nuclear@2:    /* check other values */
nuclear@2:    if (bit_depth != 1 && bit_depth != 2 && bit_depth != 4 &&
nuclear@2:       bit_depth != 8 && bit_depth != 16)
nuclear@2:       png_error(png_ptr, "Invalid bit depth in IHDR");
nuclear@2: 
nuclear@2:    if (color_type < 0 || color_type == 1 ||
nuclear@2:       color_type == 5 || color_type > 6)
nuclear@2:       png_error(png_ptr, "Invalid color type in IHDR");
nuclear@2: 
nuclear@2:    if (((color_type == PNG_COLOR_TYPE_PALETTE) && bit_depth > 8) ||
nuclear@2:        ((color_type == PNG_COLOR_TYPE_RGB ||
nuclear@2:          color_type == PNG_COLOR_TYPE_GRAY_ALPHA ||
nuclear@2:          color_type == PNG_COLOR_TYPE_RGB_ALPHA) && bit_depth < 8))
nuclear@2:       png_error(png_ptr, "Invalid color type/bit depth combination in IHDR");
nuclear@2: 
nuclear@2:    if (interlace_type >= PNG_INTERLACE_LAST)
nuclear@2:       png_error(png_ptr, "Unknown interlace method in IHDR");
nuclear@2: 
nuclear@2:    if (compression_type != PNG_COMPRESSION_TYPE_BASE)
nuclear@2:       png_error(png_ptr, "Unknown compression method in IHDR");
nuclear@2: 
nuclear@2: #if defined(PNG_MNG_FEATURES_SUPPORTED)
nuclear@2:    /* Accept filter_method 64 (intrapixel differencing) only if
nuclear@2:     * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and
nuclear@2:     * 2. Libpng did not read a PNG signature (this filter_method is only
nuclear@2:     *    used in PNG datastreams that are embedded in MNG datastreams) and
nuclear@2:     * 3. The application called png_permit_mng_features with a mask that
nuclear@2:     *    included PNG_FLAG_MNG_FILTER_64 and
nuclear@2:     * 4. The filter_method is 64 and
nuclear@2:     * 5. The color_type is RGB or RGBA
nuclear@2:     */
nuclear@2:    if ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&png_ptr->mng_features_permitted)
nuclear@2:       png_warning(png_ptr, "MNG features are not allowed in a PNG datastream");
nuclear@2:    if (filter_type != PNG_FILTER_TYPE_BASE)
nuclear@2:    {
nuclear@2:      if (!((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) &&
nuclear@2:         (filter_type == PNG_INTRAPIXEL_DIFFERENCING) &&
nuclear@2:         ((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE) == 0) &&
nuclear@2:         (color_type == PNG_COLOR_TYPE_RGB ||
nuclear@2:          color_type == PNG_COLOR_TYPE_RGB_ALPHA)))
nuclear@2:         png_error(png_ptr, "Unknown filter method in IHDR");
nuclear@2:      if (png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)
nuclear@2:         png_warning(png_ptr, "Invalid filter method in IHDR");
nuclear@2:    }
nuclear@2: #else
nuclear@2:    if (filter_type != PNG_FILTER_TYPE_BASE)
nuclear@2:       png_error(png_ptr, "Unknown filter method in IHDR");
nuclear@2: #endif
nuclear@2: 
nuclear@2:    info_ptr->width = width;
nuclear@2:    info_ptr->height = height;
nuclear@2:    info_ptr->bit_depth = (png_byte)bit_depth;
nuclear@2:    info_ptr->color_type =(png_byte) color_type;
nuclear@2:    info_ptr->compression_type = (png_byte)compression_type;
nuclear@2:    info_ptr->filter_type = (png_byte)filter_type;
nuclear@2:    info_ptr->interlace_type = (png_byte)interlace_type;
nuclear@2:    if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
nuclear@2:       info_ptr->channels = 1;
nuclear@2:    else if (info_ptr->color_type & PNG_COLOR_MASK_COLOR)
nuclear@2:       info_ptr->channels = 3;
nuclear@2:    else
nuclear@2:       info_ptr->channels = 1;
nuclear@2:    if (info_ptr->color_type & PNG_COLOR_MASK_ALPHA)
nuclear@2:       info_ptr->channels++;
nuclear@2:    info_ptr->pixel_depth = (png_byte)(info_ptr->channels * info_ptr->bit_depth);
nuclear@2: 
nuclear@2:    /* check for potential overflow */
nuclear@2:    if (width > (PNG_UINT_32_MAX
nuclear@2:                  >> 3)      /* 8-byte RGBA pixels */
nuclear@2:                  - 64       /* bigrowbuf hack */
nuclear@2:                  - 1        /* filter byte */
nuclear@2:                  - 7*8      /* rounding of width to multiple of 8 pixels */
nuclear@2:                  - 8)       /* extra max_pixel_depth pad */
nuclear@2:       info_ptr->rowbytes = (png_size_t)0;
nuclear@2:    else
nuclear@2:       info_ptr->rowbytes = PNG_ROWBYTES(info_ptr->pixel_depth, width);
nuclear@2: }
nuclear@2: 
nuclear@2: #if defined(PNG_oFFs_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_oFFs(png_structp png_ptr, png_infop info_ptr,
nuclear@2:    png_int_32 offset_x, png_int_32 offset_y, int unit_type)
nuclear@2: {
nuclear@2:    png_debug1(1, "in %s storage function\n", "oFFs");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    info_ptr->x_offset = offset_x;
nuclear@2:    info_ptr->y_offset = offset_y;
nuclear@2:    info_ptr->offset_unit_type = (png_byte)unit_type;
nuclear@2:    info_ptr->valid |= PNG_INFO_oFFs;
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_pCAL_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_pCAL(png_structp png_ptr, png_infop info_ptr,
nuclear@2:    png_charp purpose, png_int_32 X0, png_int_32 X1, int type, int nparams,
nuclear@2:    png_charp units, png_charpp params)
nuclear@2: {
nuclear@2:    png_uint_32 length;
nuclear@2:    int i;
nuclear@2: 
nuclear@2:    png_debug1(1, "in %s storage function\n", "pCAL");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    length = png_strlen(purpose) + 1;
nuclear@2:    png_debug1(3, "allocating purpose for info (%lu bytes)\n",
nuclear@2:      (unsigned long)length);
nuclear@2:    info_ptr->pcal_purpose = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@2:    if (info_ptr->pcal_purpose == NULL)
nuclear@2:    {
nuclear@2:        png_warning(png_ptr, "Insufficient memory for pCAL purpose.");
nuclear@2:       return;
nuclear@2:    }
nuclear@2:    png_memcpy(info_ptr->pcal_purpose, purpose, (png_size_t)length);
nuclear@2: 
nuclear@2:    png_debug(3, "storing X0, X1, type, and nparams in info\n");
nuclear@2:    info_ptr->pcal_X0 = X0;
nuclear@2:    info_ptr->pcal_X1 = X1;
nuclear@2:    info_ptr->pcal_type = (png_byte)type;
nuclear@2:    info_ptr->pcal_nparams = (png_byte)nparams;
nuclear@2: 
nuclear@2:    length = png_strlen(units) + 1;
nuclear@2:    png_debug1(3, "allocating units for info (%lu bytes)\n",
nuclear@2:      (unsigned long)length);
nuclear@2:    info_ptr->pcal_units = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@2:    if (info_ptr->pcal_units == NULL)
nuclear@2:    {
nuclear@2:        png_warning(png_ptr, "Insufficient memory for pCAL units.");
nuclear@2:       return;
nuclear@2:    }
nuclear@2:    png_memcpy(info_ptr->pcal_units, units, (png_size_t)length);
nuclear@2: 
nuclear@2:    info_ptr->pcal_params = (png_charpp)png_malloc_warn(png_ptr,
nuclear@2:       (png_uint_32)((nparams + 1) * png_sizeof(png_charp)));
nuclear@2:    if (info_ptr->pcal_params == NULL)
nuclear@2:    {
nuclear@2:        png_warning(png_ptr, "Insufficient memory for pCAL params.");
nuclear@2:       return;
nuclear@2:    }
nuclear@2: 
nuclear@2:    info_ptr->pcal_params[nparams] = NULL;
nuclear@2: 
nuclear@2:    for (i = 0; i < nparams; i++)
nuclear@2:    {
nuclear@2:       length = png_strlen(params[i]) + 1;
nuclear@2:       png_debug2(3, "allocating parameter %d for info (%lu bytes)\n", i,
nuclear@2:         (unsigned long)length);
nuclear@2:       info_ptr->pcal_params[i] = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@2:       if (info_ptr->pcal_params[i] == NULL)
nuclear@2:       {
nuclear@2:           png_warning(png_ptr, "Insufficient memory for pCAL parameter.");
nuclear@2:           return;
nuclear@2:       }
nuclear@2:       png_memcpy(info_ptr->pcal_params[i], params[i], (png_size_t)length);
nuclear@2:    }
nuclear@2: 
nuclear@2:    info_ptr->valid |= PNG_INFO_pCAL;
nuclear@2: #ifdef PNG_FREE_ME_SUPPORTED
nuclear@2:    info_ptr->free_me |= PNG_FREE_PCAL;
nuclear@2: #endif
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_READ_sCAL_SUPPORTED) || defined(PNG_WRITE_sCAL_SUPPORTED)
nuclear@2: #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@2: void PNGAPI
nuclear@2: png_set_sCAL(png_structp png_ptr, png_infop info_ptr,
nuclear@2:              int unit, double width, double height)
nuclear@2: {
nuclear@2:    png_debug1(1, "in %s storage function\n", "sCAL");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    info_ptr->scal_unit = (png_byte)unit;
nuclear@2:    info_ptr->scal_pixel_width = width;
nuclear@2:    info_ptr->scal_pixel_height = height;
nuclear@2: 
nuclear@2:    info_ptr->valid |= PNG_INFO_sCAL;
nuclear@2: }
nuclear@2: #else
nuclear@2: #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@2: void PNGAPI
nuclear@2: png_set_sCAL_s(png_structp png_ptr, png_infop info_ptr,
nuclear@2:              int unit, png_charp swidth, png_charp sheight)
nuclear@2: {
nuclear@2:    png_uint_32 length;
nuclear@2: 
nuclear@2:    png_debug1(1, "in %s storage function\n", "sCAL");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    info_ptr->scal_unit = (png_byte)unit;
nuclear@2: 
nuclear@2:    length = png_strlen(swidth) + 1;
nuclear@2:    png_debug1(3, "allocating unit for info (%u bytes)\n",
nuclear@2:       (unsigned int)length);
nuclear@2:    info_ptr->scal_s_width = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@2:    if (info_ptr->scal_s_width == NULL)
nuclear@2:    {
nuclear@2:       png_warning(png_ptr,
nuclear@2:        "Memory allocation failed while processing sCAL.");
nuclear@2:       return;
nuclear@2:    }
nuclear@2:    png_memcpy(info_ptr->scal_s_width, swidth, (png_size_t)length);
nuclear@2: 
nuclear@2:    length = png_strlen(sheight) + 1;
nuclear@2:    png_debug1(3, "allocating unit for info (%u bytes)\n",
nuclear@2:       (unsigned int)length);
nuclear@2:    info_ptr->scal_s_height = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@2:    if (info_ptr->scal_s_height == NULL)
nuclear@2:    {
nuclear@2:       png_free (png_ptr, info_ptr->scal_s_width);
nuclear@2:       info_ptr->scal_s_width = NULL;
nuclear@2:       png_warning(png_ptr,
nuclear@2:        "Memory allocation failed while processing sCAL.");
nuclear@2:       return;
nuclear@2:    }
nuclear@2:    png_memcpy(info_ptr->scal_s_height, sheight, (png_size_t)length);
nuclear@2:    info_ptr->valid |= PNG_INFO_sCAL;
nuclear@2: #ifdef PNG_FREE_ME_SUPPORTED
nuclear@2:    info_ptr->free_me |= PNG_FREE_SCAL;
nuclear@2: #endif
nuclear@2: }
nuclear@2: #endif
nuclear@2: #endif
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_pHYs_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_pHYs(png_structp png_ptr, png_infop info_ptr,
nuclear@2:    png_uint_32 res_x, png_uint_32 res_y, int unit_type)
nuclear@2: {
nuclear@2:    png_debug1(1, "in %s storage function\n", "pHYs");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    info_ptr->x_pixels_per_unit = res_x;
nuclear@2:    info_ptr->y_pixels_per_unit = res_y;
nuclear@2:    info_ptr->phys_unit_type = (png_byte)unit_type;
nuclear@2:    info_ptr->valid |= PNG_INFO_pHYs;
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: void PNGAPI
nuclear@2: png_set_PLTE(png_structp png_ptr, png_infop info_ptr,
nuclear@2:    png_colorp palette, int num_palette)
nuclear@2: {
nuclear@2: 
nuclear@2:    png_debug1(1, "in %s storage function\n", "PLTE");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    if (num_palette < 0 || num_palette > PNG_MAX_PALETTE_LENGTH)
nuclear@2:      {
nuclear@2:        if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE)
nuclear@2:          png_error(png_ptr, "Invalid palette length");
nuclear@2:        else
nuclear@2:        {
nuclear@2:          png_warning(png_ptr, "Invalid palette length");
nuclear@2:          return;
nuclear@2:        }
nuclear@2:      }
nuclear@2: 
nuclear@2:    /*
nuclear@2:     * It may not actually be necessary to set png_ptr->palette here;
nuclear@2:     * we do it for backward compatibility with the way the png_handle_tRNS
nuclear@2:     * function used to do the allocation.
nuclear@2:     */
nuclear@2: #ifdef PNG_FREE_ME_SUPPORTED
nuclear@2:    png_free_data(png_ptr, info_ptr, PNG_FREE_PLTE, 0);
nuclear@2: #endif
nuclear@2: 
nuclear@2:    /* Changed in libpng-1.2.1 to allocate PNG_MAX_PALETTE_LENGTH instead
nuclear@2:       of num_palette entries,
nuclear@2:       in case of an invalid PNG file that has too-large sample values. */
nuclear@2:    png_ptr->palette = (png_colorp)png_malloc(png_ptr,
nuclear@2:       PNG_MAX_PALETTE_LENGTH * png_sizeof(png_color));
nuclear@2:    png_memset(png_ptr->palette, 0, PNG_MAX_PALETTE_LENGTH *
nuclear@2:       png_sizeof(png_color));
nuclear@2:    png_memcpy(png_ptr->palette, palette, num_palette * png_sizeof(png_color));
nuclear@2:    info_ptr->palette = png_ptr->palette;
nuclear@2:    info_ptr->num_palette = png_ptr->num_palette = (png_uint_16)num_palette;
nuclear@2: 
nuclear@2: #ifdef PNG_FREE_ME_SUPPORTED
nuclear@2:    info_ptr->free_me |= PNG_FREE_PLTE;
nuclear@2: #else
nuclear@2:    png_ptr->flags |= PNG_FLAG_FREE_PLTE;
nuclear@2: #endif
nuclear@2: 
nuclear@2:    info_ptr->valid |= PNG_INFO_PLTE;
nuclear@2: }
nuclear@2: 
nuclear@2: #if defined(PNG_sBIT_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_sBIT(png_structp png_ptr, png_infop info_ptr,
nuclear@2:    png_color_8p sig_bit)
nuclear@2: {
nuclear@2:    png_debug1(1, "in %s storage function\n", "sBIT");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    png_memcpy(&(info_ptr->sig_bit), sig_bit, png_sizeof(png_color_8));
nuclear@2:    info_ptr->valid |= PNG_INFO_sBIT;
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_sRGB_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_sRGB(png_structp png_ptr, png_infop info_ptr, int intent)
nuclear@2: {
nuclear@2:    png_debug1(1, "in %s storage function\n", "sRGB");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    info_ptr->srgb_intent = (png_byte)intent;
nuclear@2:    info_ptr->valid |= PNG_INFO_sRGB;
nuclear@2: }
nuclear@2: 
nuclear@2: void PNGAPI
nuclear@2: png_set_sRGB_gAMA_and_cHRM(png_structp png_ptr, png_infop info_ptr,
nuclear@2:    int intent)
nuclear@2: {
nuclear@2: #if defined(PNG_gAMA_SUPPORTED)
nuclear@2: #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@2:    float file_gamma;
nuclear@2: #endif
nuclear@2: #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@2:    png_fixed_point int_file_gamma;
nuclear@2: #endif
nuclear@2: #endif
nuclear@2: #if defined(PNG_cHRM_SUPPORTED)
nuclear@2: #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@2:    float white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y;
nuclear@2: #endif
nuclear@2: #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@2:    png_fixed_point int_white_x, int_white_y, int_red_x, int_red_y, int_green_x,
nuclear@2:       int_green_y, int_blue_x, int_blue_y;
nuclear@2: #endif
nuclear@2: #endif
nuclear@2:    png_debug1(1, "in %s storage function\n", "sRGB_gAMA_and_cHRM");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    png_set_sRGB(png_ptr, info_ptr, intent);
nuclear@2: 
nuclear@2: #if defined(PNG_gAMA_SUPPORTED)
nuclear@2: #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@2:    file_gamma = (float).45455;
nuclear@2:    png_set_gAMA(png_ptr, info_ptr, file_gamma);
nuclear@2: #endif
nuclear@2: #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@2:    int_file_gamma = 45455L;
nuclear@2:    png_set_gAMA_fixed(png_ptr, info_ptr, int_file_gamma);
nuclear@2: #endif
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_cHRM_SUPPORTED)
nuclear@2: #ifdef PNG_FIXED_POINT_SUPPORTED
nuclear@2:    int_white_x = 31270L;
nuclear@2:    int_white_y = 32900L;
nuclear@2:    int_red_x   = 64000L;
nuclear@2:    int_red_y   = 33000L;
nuclear@2:    int_green_x = 30000L;
nuclear@2:    int_green_y = 60000L;
nuclear@2:    int_blue_x  = 15000L;
nuclear@2:    int_blue_y  =  6000L;
nuclear@2: 
nuclear@2:    png_set_cHRM_fixed(png_ptr, info_ptr,
nuclear@2:       int_white_x, int_white_y, int_red_x, int_red_y, int_green_x, int_green_y,
nuclear@2:       int_blue_x, int_blue_y);
nuclear@2: #endif
nuclear@2: #ifdef PNG_FLOATING_POINT_SUPPORTED
nuclear@2:    white_x = (float).3127;
nuclear@2:    white_y = (float).3290;
nuclear@2:    red_x   = (float).64;
nuclear@2:    red_y   = (float).33;
nuclear@2:    green_x = (float).30;
nuclear@2:    green_y = (float).60;
nuclear@2:    blue_x  = (float).15;
nuclear@2:    blue_y  = (float).06;
nuclear@2: 
nuclear@2:    png_set_cHRM(png_ptr, info_ptr,
nuclear@2:       white_x, white_y, red_x, red_y, green_x, green_y, blue_x, blue_y);
nuclear@2: #endif
nuclear@2: #endif
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: 
nuclear@2: #if defined(PNG_iCCP_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_iCCP(png_structp png_ptr, png_infop info_ptr,
nuclear@2:              png_charp name, int compression_type,
nuclear@2:              png_charp profile, png_uint_32 proflen)
nuclear@2: {
nuclear@2:    png_charp new_iccp_name;
nuclear@2:    png_charp new_iccp_profile;
nuclear@2:    png_uint_32 length;
nuclear@2: 
nuclear@2:    png_debug1(1, "in %s storage function\n", "iCCP");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL || name == NULL || profile == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    length = png_strlen(name)+1;
nuclear@2:    new_iccp_name = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@2:    if (new_iccp_name == NULL)
nuclear@2:    {
nuclear@2:       png_warning(png_ptr, "Insufficient memory to process iCCP chunk.");
nuclear@2:       return;
nuclear@2:    }
nuclear@2:    png_memcpy(new_iccp_name, name, length);
nuclear@2:    new_iccp_profile = (png_charp)png_malloc_warn(png_ptr, proflen);
nuclear@2:    if (new_iccp_profile == NULL)
nuclear@2:    {
nuclear@2:       png_free (png_ptr, new_iccp_name);
nuclear@2:       png_warning(png_ptr,
nuclear@2:       "Insufficient memory to process iCCP profile.");
nuclear@2:       return;
nuclear@2:    }
nuclear@2:    png_memcpy(new_iccp_profile, profile, (png_size_t)proflen);
nuclear@2: 
nuclear@2:    png_free_data(png_ptr, info_ptr, PNG_FREE_ICCP, 0);
nuclear@2: 
nuclear@2:    info_ptr->iccp_proflen = proflen;
nuclear@2:    info_ptr->iccp_name = new_iccp_name;
nuclear@2:    info_ptr->iccp_profile = new_iccp_profile;
nuclear@2:    /* Compression is always zero but is here so the API and info structure
nuclear@2:     * does not have to change if we introduce multiple compression types */
nuclear@2:    info_ptr->iccp_compression = (png_byte)compression_type;
nuclear@2: #ifdef PNG_FREE_ME_SUPPORTED
nuclear@2:    info_ptr->free_me |= PNG_FREE_ICCP;
nuclear@2: #endif
nuclear@2:    info_ptr->valid |= PNG_INFO_iCCP;
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_TEXT_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_text(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
nuclear@2:    int num_text)
nuclear@2: {
nuclear@2:    int ret;
nuclear@2:    ret = png_set_text_2(png_ptr, info_ptr, text_ptr, num_text);
nuclear@2:    if (ret)
nuclear@2:      png_error(png_ptr, "Insufficient memory to store text");
nuclear@2: }
nuclear@2: 
nuclear@2: int /* PRIVATE */
nuclear@2: png_set_text_2(png_structp png_ptr, png_infop info_ptr, png_textp text_ptr,
nuclear@2:    int num_text)
nuclear@2: {
nuclear@2:    int i;
nuclear@2: 
nuclear@2:    png_debug1(1, "in %s storage function\n", (png_ptr->chunk_name[0] == '\0' ?
nuclear@2:       "text" : (png_const_charp)png_ptr->chunk_name));
nuclear@2: 
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL || num_text == 0)
nuclear@2:       return(0);
nuclear@2: 
nuclear@2:    /* Make sure we have enough space in the "text" array in info_struct
nuclear@2:     * to hold all of the incoming text_ptr objects.
nuclear@2:     */
nuclear@2:    if (info_ptr->num_text + num_text > info_ptr->max_text)
nuclear@2:    {
nuclear@2:       if (info_ptr->text != NULL)
nuclear@2:       {
nuclear@2:          png_textp old_text;
nuclear@2:          int old_max;
nuclear@2: 
nuclear@2:          old_max = info_ptr->max_text;
nuclear@2:          info_ptr->max_text = info_ptr->num_text + num_text + 8;
nuclear@2:          old_text = info_ptr->text;
nuclear@2:          info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
nuclear@2:             (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
nuclear@2:          if (info_ptr->text == NULL)
nuclear@2:            {
nuclear@2:              png_free(png_ptr, old_text);
nuclear@2:              return(1);
nuclear@2:            }
nuclear@2:          png_memcpy(info_ptr->text, old_text, (png_size_t)(old_max *
nuclear@2:             png_sizeof(png_text)));
nuclear@2:          png_free(png_ptr, old_text);
nuclear@2:       }
nuclear@2:       else
nuclear@2:       {
nuclear@2:          info_ptr->max_text = num_text + 8;
nuclear@2:          info_ptr->num_text = 0;
nuclear@2:          info_ptr->text = (png_textp)png_malloc_warn(png_ptr,
nuclear@2:             (png_uint_32)(info_ptr->max_text * png_sizeof(png_text)));
nuclear@2:          if (info_ptr->text == NULL)
nuclear@2:            return(1);
nuclear@2: #ifdef PNG_FREE_ME_SUPPORTED
nuclear@2:          info_ptr->free_me |= PNG_FREE_TEXT;
nuclear@2: #endif
nuclear@2:       }
nuclear@2:       png_debug1(3, "allocated %d entries for info_ptr->text\n",
nuclear@2:          info_ptr->max_text);
nuclear@2:    }
nuclear@2:    for (i = 0; i < num_text; i++)
nuclear@2:    {
nuclear@2:       png_size_t text_length, key_len;
nuclear@2:       png_size_t lang_len, lang_key_len;
nuclear@2:       png_textp textp = &(info_ptr->text[info_ptr->num_text]);
nuclear@2: 
nuclear@2:       if (text_ptr[i].key == NULL)
nuclear@2:           continue;
nuclear@2: 
nuclear@2:       key_len = png_strlen(text_ptr[i].key);
nuclear@2: 
nuclear@2:       if (text_ptr[i].compression <= 0)
nuclear@2:       {
nuclear@2:         lang_len = 0;
nuclear@2:         lang_key_len = 0;
nuclear@2:       }
nuclear@2:       else
nuclear@2: #ifdef PNG_iTXt_SUPPORTED
nuclear@2:       {
nuclear@2:         /* set iTXt data */
nuclear@2:         if (text_ptr[i].lang != NULL)
nuclear@2:           lang_len = png_strlen(text_ptr[i].lang);
nuclear@2:         else
nuclear@2:           lang_len = 0;
nuclear@2:         if (text_ptr[i].lang_key != NULL)
nuclear@2:           lang_key_len = png_strlen(text_ptr[i].lang_key);
nuclear@2:         else
nuclear@2:           lang_key_len = 0;
nuclear@2:       }
nuclear@2: #else
nuclear@2:       {
nuclear@2:         png_warning(png_ptr, "iTXt chunk not supported.");
nuclear@2:         continue;
nuclear@2:       }
nuclear@2: #endif
nuclear@2: 
nuclear@2:       if (text_ptr[i].text == NULL || text_ptr[i].text[0] == '\0')
nuclear@2:       {
nuclear@2:          text_length = 0;
nuclear@2: #ifdef PNG_iTXt_SUPPORTED
nuclear@2:          if (text_ptr[i].compression > 0)
nuclear@2:             textp->compression = PNG_ITXT_COMPRESSION_NONE;
nuclear@2:          else
nuclear@2: #endif
nuclear@2:             textp->compression = PNG_TEXT_COMPRESSION_NONE;
nuclear@2:       }
nuclear@2:       else
nuclear@2:       {
nuclear@2:          text_length = png_strlen(text_ptr[i].text);
nuclear@2:          textp->compression = text_ptr[i].compression;
nuclear@2:       }
nuclear@2: 
nuclear@2:       textp->key = (png_charp)png_malloc_warn(png_ptr,
nuclear@2:          (png_uint_32)
nuclear@2:          (key_len + text_length + lang_len + lang_key_len + 4));
nuclear@2:       if (textp->key == NULL)
nuclear@2:         return(1);
nuclear@2:       png_debug2(2, "Allocated %lu bytes at %x in png_set_text\n",
nuclear@2:          (png_uint_32)
nuclear@2:          (key_len + lang_len + lang_key_len + text_length + 4),
nuclear@2:          (int)textp->key);
nuclear@2: 
nuclear@2:       png_memcpy(textp->key, text_ptr[i].key,
nuclear@2:          (png_size_t)(key_len));
nuclear@2:       *(textp->key + key_len) = '\0';
nuclear@2: #ifdef PNG_iTXt_SUPPORTED
nuclear@2:       if (text_ptr[i].compression > 0)
nuclear@2:       {
nuclear@2:          textp->lang = textp->key + key_len + 1;
nuclear@2:          png_memcpy(textp->lang, text_ptr[i].lang, lang_len);
nuclear@2:          *(textp->lang + lang_len) = '\0';
nuclear@2:          textp->lang_key = textp->lang + lang_len + 1;
nuclear@2:          png_memcpy(textp->lang_key, text_ptr[i].lang_key, lang_key_len);
nuclear@2:          *(textp->lang_key + lang_key_len) = '\0';
nuclear@2:          textp->text = textp->lang_key + lang_key_len + 1;
nuclear@2:       }
nuclear@2:       else
nuclear@2: #endif
nuclear@2:       {
nuclear@2: #ifdef PNG_iTXt_SUPPORTED
nuclear@2:          textp->lang=NULL;
nuclear@2:          textp->lang_key=NULL;
nuclear@2: #endif
nuclear@2:          textp->text = textp->key + key_len + 1;
nuclear@2:       }
nuclear@2:       if (text_length)
nuclear@2:          png_memcpy(textp->text, text_ptr[i].text,
nuclear@2:             (png_size_t)(text_length));
nuclear@2:       *(textp->text + text_length) = '\0';
nuclear@2: 
nuclear@2: #ifdef PNG_iTXt_SUPPORTED
nuclear@2:       if (textp->compression > 0)
nuclear@2:       {
nuclear@2:          textp->text_length = 0;
nuclear@2:          textp->itxt_length = text_length;
nuclear@2:       }
nuclear@2:       else
nuclear@2: #endif
nuclear@2:       {
nuclear@2:          textp->text_length = text_length;
nuclear@2: #ifdef PNG_iTXt_SUPPORTED
nuclear@2:          textp->itxt_length = 0;
nuclear@2: #endif
nuclear@2:       }
nuclear@2:       info_ptr->num_text++;
nuclear@2:       png_debug1(3, "transferred text chunk %d\n", info_ptr->num_text);
nuclear@2:    }
nuclear@2:    return(0);
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_tIME_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_tIME(png_structp png_ptr, png_infop info_ptr, png_timep mod_time)
nuclear@2: {
nuclear@2:    png_debug1(1, "in %s storage function\n", "tIME");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL ||
nuclear@2:        (png_ptr->mode & PNG_WROTE_tIME))
nuclear@2:       return;
nuclear@2: 
nuclear@2:    png_memcpy(&(info_ptr->mod_time), mod_time, png_sizeof(png_time));
nuclear@2:    info_ptr->valid |= PNG_INFO_tIME;
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_tRNS_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_tRNS(png_structp png_ptr, png_infop info_ptr,
nuclear@2:    png_bytep trans, int num_trans, png_color_16p trans_values)
nuclear@2: {
nuclear@2:    png_debug1(1, "in %s storage function\n", "tRNS");
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    if (trans != NULL)
nuclear@2:    {
nuclear@2:        /*
nuclear@2:         * It may not actually be necessary to set png_ptr->trans here;
nuclear@2:         * we do it for backward compatibility with the way the png_handle_tRNS
nuclear@2:         * function used to do the allocation.
nuclear@2:         */
nuclear@2: 
nuclear@2: #ifdef PNG_FREE_ME_SUPPORTED
nuclear@2:        png_free_data(png_ptr, info_ptr, PNG_FREE_TRNS, 0);
nuclear@2: #endif
nuclear@2: 
nuclear@2:        /* Changed from num_trans to PNG_MAX_PALETTE_LENGTH in version 1.2.1 */
nuclear@2:        png_ptr->trans = info_ptr->trans = (png_bytep)png_malloc(png_ptr,
nuclear@2:            (png_uint_32)PNG_MAX_PALETTE_LENGTH);
nuclear@2:        if (num_trans > 0 && num_trans <= PNG_MAX_PALETTE_LENGTH)
nuclear@2:          png_memcpy(info_ptr->trans, trans, (png_size_t)num_trans);
nuclear@2:    }
nuclear@2: 
nuclear@2:    if (trans_values != NULL)
nuclear@2:    {
nuclear@2:       int sample_max = (1 << info_ptr->bit_depth);
nuclear@2:       if ((info_ptr->color_type == PNG_COLOR_TYPE_GRAY &&
nuclear@2:           (int)trans_values->gray > sample_max) ||
nuclear@2:           (info_ptr->color_type == PNG_COLOR_TYPE_RGB &&
nuclear@2:           ((int)trans_values->red > sample_max ||
nuclear@2:           (int)trans_values->green > sample_max ||
nuclear@2:           (int)trans_values->blue > sample_max)))
nuclear@2:         png_warning(png_ptr,
nuclear@2:            "tRNS chunk has out-of-range samples for bit_depth");
nuclear@2:       png_memcpy(&(info_ptr->trans_values), trans_values,
nuclear@2:          png_sizeof(png_color_16));
nuclear@2:       if (num_trans == 0)
nuclear@2:         num_trans = 1;
nuclear@2:    }
nuclear@2: 
nuclear@2:    info_ptr->num_trans = (png_uint_16)num_trans;
nuclear@2:    if (num_trans != 0)
nuclear@2:    {
nuclear@2:       info_ptr->valid |= PNG_INFO_tRNS;
nuclear@2: #ifdef PNG_FREE_ME_SUPPORTED
nuclear@2:       info_ptr->free_me |= PNG_FREE_TRNS;
nuclear@2: #else
nuclear@2:       png_ptr->flags |= PNG_FLAG_FREE_TRNS;
nuclear@2: #endif
nuclear@2:    }
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_sPLT_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_sPLT(png_structp png_ptr,
nuclear@2:              png_infop info_ptr, png_sPLT_tp entries, int nentries)
nuclear@2: /*
nuclear@2:  *  entries        - array of png_sPLT_t structures
nuclear@2:  *                   to be added to the list of palettes
nuclear@2:  *                   in the info structure.
nuclear@2:  *  nentries       - number of palette structures to be
nuclear@2:  *                   added.
nuclear@2:  */
nuclear@2: {
nuclear@2:     png_sPLT_tp np;
nuclear@2:     int i;
nuclear@2: 
nuclear@2:     if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:        return;
nuclear@2: 
nuclear@2:     np = (png_sPLT_tp)png_malloc_warn(png_ptr,
nuclear@2:         (info_ptr->splt_palettes_num + nentries) *
nuclear@2:         (png_uint_32)png_sizeof(png_sPLT_t));
nuclear@2:     if (np == NULL)
nuclear@2:     {
nuclear@2:       png_warning(png_ptr, "No memory for sPLT palettes.");
nuclear@2:       return;
nuclear@2:     }
nuclear@2: 
nuclear@2:     png_memcpy(np, info_ptr->splt_palettes,
nuclear@2:            info_ptr->splt_palettes_num * png_sizeof(png_sPLT_t));
nuclear@2:     png_free(png_ptr, info_ptr->splt_palettes);
nuclear@2:     info_ptr->splt_palettes=NULL;
nuclear@2: 
nuclear@2:     for (i = 0; i < nentries; i++)
nuclear@2:     {
nuclear@2:         png_sPLT_tp to = np + info_ptr->splt_palettes_num + i;
nuclear@2:         png_sPLT_tp from = entries + i;
nuclear@2:         png_uint_32 length;
nuclear@2: 
nuclear@2:         length = png_strlen(from->name) + 1;
nuclear@2:         to->name = (png_charp)png_malloc_warn(png_ptr, length);
nuclear@2:         if (to->name == NULL)
nuclear@2:         {
nuclear@2:            png_warning(png_ptr,
nuclear@2:              "Out of memory while processing sPLT chunk");
nuclear@2:            continue;
nuclear@2:         }
nuclear@2:         png_memcpy(to->name, from->name, length);
nuclear@2:         to->entries = (png_sPLT_entryp)png_malloc_warn(png_ptr,
nuclear@2:             (png_uint_32)(from->nentries * png_sizeof(png_sPLT_entry)));
nuclear@2:         if (to->entries == NULL)
nuclear@2:         {
nuclear@2:            png_warning(png_ptr,
nuclear@2:              "Out of memory while processing sPLT chunk");
nuclear@2:            png_free(png_ptr, to->name);
nuclear@2:            to->name = NULL;
nuclear@2:            continue;
nuclear@2:         }
nuclear@2:         png_memcpy(to->entries, from->entries,
nuclear@2:             from->nentries * png_sizeof(png_sPLT_entry));
nuclear@2:         to->nentries = from->nentries;
nuclear@2:         to->depth = from->depth;
nuclear@2:     }
nuclear@2: 
nuclear@2:     info_ptr->splt_palettes = np;
nuclear@2:     info_ptr->splt_palettes_num += nentries;
nuclear@2:     info_ptr->valid |= PNG_INFO_sPLT;
nuclear@2: #ifdef PNG_FREE_ME_SUPPORTED
nuclear@2:     info_ptr->free_me |= PNG_FREE_SPLT;
nuclear@2: #endif
nuclear@2: }
nuclear@2: #endif /* PNG_sPLT_SUPPORTED */
nuclear@2: 
nuclear@2: #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_unknown_chunks(png_structp png_ptr,
nuclear@2:    png_infop info_ptr, png_unknown_chunkp unknowns, int num_unknowns)
nuclear@2: {
nuclear@2:     png_unknown_chunkp np;
nuclear@2:     int i;
nuclear@2: 
nuclear@2:     if (png_ptr == NULL || info_ptr == NULL || num_unknowns == 0)
nuclear@2:         return;
nuclear@2: 
nuclear@2:     np = (png_unknown_chunkp)png_malloc_warn(png_ptr,
nuclear@2:         (png_uint_32)((info_ptr->unknown_chunks_num + num_unknowns) *
nuclear@2:         png_sizeof(png_unknown_chunk)));
nuclear@2:     if (np == NULL)
nuclear@2:     {
nuclear@2:        png_warning(png_ptr,
nuclear@2:           "Out of memory while processing unknown chunk.");
nuclear@2:        return;
nuclear@2:     }
nuclear@2: 
nuclear@2:     png_memcpy(np, info_ptr->unknown_chunks,
nuclear@2:            info_ptr->unknown_chunks_num * png_sizeof(png_unknown_chunk));
nuclear@2:     png_free(png_ptr, info_ptr->unknown_chunks);
nuclear@2:     info_ptr->unknown_chunks=NULL;
nuclear@2: 
nuclear@2:     for (i = 0; i < num_unknowns; i++)
nuclear@2:     {
nuclear@2:        png_unknown_chunkp to = np + info_ptr->unknown_chunks_num + i;
nuclear@2:        png_unknown_chunkp from = unknowns + i;
nuclear@2: 
nuclear@2:        png_memcpy((png_charp)to->name, 
nuclear@2:                   (png_charp)from->name, 
nuclear@2:                   png_sizeof(from->name));
nuclear@2:        to->name[png_sizeof(to->name)-1] = '\0';
nuclear@2:        to->size = from->size;
nuclear@2:        /* note our location in the read or write sequence */
nuclear@2:        to->location = (png_byte)(png_ptr->mode & 0xff);
nuclear@2: 
nuclear@2:        if (from->size == 0)
nuclear@2:           to->data=NULL;
nuclear@2:        else
nuclear@2:        {
nuclear@2:           to->data = (png_bytep)png_malloc_warn(png_ptr,
nuclear@2:             (png_uint_32)from->size);
nuclear@2:           if (to->data == NULL)
nuclear@2:           {
nuclear@2:              png_warning(png_ptr,
nuclear@2:               "Out of memory while processing unknown chunk.");
nuclear@2:              to->size = 0;
nuclear@2:           }
nuclear@2:           else
nuclear@2:              png_memcpy(to->data, from->data, from->size);
nuclear@2:        }
nuclear@2:     }
nuclear@2: 
nuclear@2:     info_ptr->unknown_chunks = np;
nuclear@2:     info_ptr->unknown_chunks_num += num_unknowns;
nuclear@2: #ifdef PNG_FREE_ME_SUPPORTED
nuclear@2:     info_ptr->free_me |= PNG_FREE_UNKN;
nuclear@2: #endif
nuclear@2: }
nuclear@2: void PNGAPI
nuclear@2: png_set_unknown_chunk_location(png_structp png_ptr, png_infop info_ptr,
nuclear@2:    int chunk, int location)
nuclear@2: {
nuclear@2:    if (png_ptr != NULL && info_ptr != NULL && chunk >= 0 && chunk <
nuclear@2:          (int)info_ptr->unknown_chunks_num)
nuclear@2:       info_ptr->unknown_chunks[chunk].location = (png_byte)location;
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_1_0_X) || defined(PNG_1_2_X)
nuclear@2: #if defined(PNG_READ_EMPTY_PLTE_SUPPORTED) || \
nuclear@2:     defined(PNG_WRITE_EMPTY_PLTE_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_permit_empty_plte (png_structp png_ptr, int empty_plte_permitted)
nuclear@2: {
nuclear@2:    /* This function is deprecated in favor of png_permit_mng_features()
nuclear@2:       and will be removed from libpng-1.3.0 */
nuclear@2:    png_debug(1, "in png_permit_empty_plte, DEPRECATED.\n");
nuclear@2:    if (png_ptr == NULL)
nuclear@2:       return;
nuclear@2:    png_ptr->mng_features_permitted = (png_byte)
nuclear@2:      ((png_ptr->mng_features_permitted & (~PNG_FLAG_MNG_EMPTY_PLTE)) |
nuclear@2:      ((empty_plte_permitted & PNG_FLAG_MNG_EMPTY_PLTE)));
nuclear@2: }
nuclear@2: #endif
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_MNG_FEATURES_SUPPORTED)
nuclear@2: png_uint_32 PNGAPI
nuclear@2: png_permit_mng_features (png_structp png_ptr, png_uint_32 mng_features)
nuclear@2: {
nuclear@2:    png_debug(1, "in png_permit_mng_features\n");
nuclear@2:    if (png_ptr == NULL)
nuclear@2:       return (png_uint_32)0;
nuclear@2:    png_ptr->mng_features_permitted =
nuclear@2:      (png_byte)(mng_features & PNG_ALL_MNG_FEATURES);
nuclear@2:    return (png_uint_32)png_ptr->mng_features_permitted;
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_keep_unknown_chunks(png_structp png_ptr, int keep, png_bytep
nuclear@2:    chunk_list, int num_chunks)
nuclear@2: {
nuclear@2:     png_bytep new_list, p;
nuclear@2:     int i, old_num_chunks;
nuclear@2:     if (png_ptr == NULL)
nuclear@2:        return;
nuclear@2:     if (num_chunks == 0)
nuclear@2:     {
nuclear@2:       if (keep == PNG_HANDLE_CHUNK_ALWAYS || keep == PNG_HANDLE_CHUNK_IF_SAFE)
nuclear@2:         png_ptr->flags |= PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
nuclear@2:       else
nuclear@2:         png_ptr->flags &= ~PNG_FLAG_KEEP_UNKNOWN_CHUNKS;
nuclear@2: 
nuclear@2:       if (keep == PNG_HANDLE_CHUNK_ALWAYS)
nuclear@2:         png_ptr->flags |= PNG_FLAG_KEEP_UNSAFE_CHUNKS;
nuclear@2:       else
nuclear@2:         png_ptr->flags &= ~PNG_FLAG_KEEP_UNSAFE_CHUNKS;
nuclear@2:       return;
nuclear@2:     }
nuclear@2:     if (chunk_list == NULL)
nuclear@2:       return;
nuclear@2:     old_num_chunks = png_ptr->num_chunk_list;
nuclear@2:     new_list=(png_bytep)png_malloc(png_ptr,
nuclear@2:        (png_uint_32)
nuclear@2:        (5*(num_chunks + old_num_chunks)));
nuclear@2:     if (png_ptr->chunk_list != NULL)
nuclear@2:     {
nuclear@2:        png_memcpy(new_list, png_ptr->chunk_list,
nuclear@2:           (png_size_t)(5*old_num_chunks));
nuclear@2:        png_free(png_ptr, png_ptr->chunk_list);
nuclear@2:        png_ptr->chunk_list=NULL;
nuclear@2:     }
nuclear@2:     png_memcpy(new_list + 5*old_num_chunks, chunk_list,
nuclear@2:        (png_size_t)(5*num_chunks));
nuclear@2:     for (p = new_list + 5*old_num_chunks + 4, i = 0; i<num_chunks; i++, p += 5)
nuclear@2:        *p=(png_byte)keep;
nuclear@2:     png_ptr->num_chunk_list = old_num_chunks + num_chunks;
nuclear@2:     png_ptr->chunk_list = new_list;
nuclear@2: #ifdef PNG_FREE_ME_SUPPORTED
nuclear@2:     png_ptr->free_me |= PNG_FREE_LIST;
nuclear@2: #endif
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_READ_USER_CHUNKS_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_read_user_chunk_fn(png_structp png_ptr, png_voidp user_chunk_ptr,
nuclear@2:    png_user_chunk_ptr read_user_chunk_fn)
nuclear@2: {
nuclear@2:    png_debug(1, "in png_set_read_user_chunk_fn\n");
nuclear@2:    if (png_ptr == NULL)
nuclear@2:       return;
nuclear@2:    png_ptr->read_user_chunk_fn = read_user_chunk_fn;
nuclear@2:    png_ptr->user_chunk_ptr = user_chunk_ptr;
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: #if defined(PNG_INFO_IMAGE_SUPPORTED)
nuclear@2: void PNGAPI
nuclear@2: png_set_rows(png_structp png_ptr, png_infop info_ptr, png_bytepp row_pointers)
nuclear@2: {
nuclear@2:    png_debug1(1, "in %s storage function\n", "rows");
nuclear@2: 
nuclear@2:    if (png_ptr == NULL || info_ptr == NULL)
nuclear@2:       return;
nuclear@2: 
nuclear@2:    if (info_ptr->row_pointers && (info_ptr->row_pointers != row_pointers))
nuclear@2:       png_free_data(png_ptr, info_ptr, PNG_FREE_ROWS, 0);
nuclear@2:    info_ptr->row_pointers = row_pointers;
nuclear@2:    if (row_pointers)
nuclear@2:       info_ptr->valid |= PNG_INFO_IDAT;
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: #ifdef PNG_WRITE_SUPPORTED
nuclear@2: void PNGAPI
nuclear@2: png_set_compression_buffer_size(png_structp png_ptr,
nuclear@2:     png_uint_32 size)
nuclear@2: {
nuclear@2:     if (png_ptr == NULL)
nuclear@2:        return;
nuclear@2:     png_free(png_ptr, png_ptr->zbuf);
nuclear@2:     png_ptr->zbuf_size = (png_size_t)size;
nuclear@2:     png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, size);
nuclear@2:     png_ptr->zstream.next_out = png_ptr->zbuf;
nuclear@2:     png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size;
nuclear@2: }
nuclear@2: #endif
nuclear@2: 
nuclear@2: void PNGAPI
nuclear@2: png_set_invalid(png_structp png_ptr, png_infop info_ptr, int mask)
nuclear@2: {
nuclear@2:    if (png_ptr && info_ptr)
nuclear@2:       info_ptr->valid &= ~mask;
nuclear@2: }
nuclear@2: 
nuclear@2: 
nuclear@2: #ifndef PNG_1_0_X
nuclear@2: #ifdef PNG_ASSEMBLER_CODE_SUPPORTED
nuclear@2: /* function was added to libpng 1.2.0 and should always exist by default */
nuclear@2: void PNGAPI
nuclear@2: png_set_asm_flags (png_structp png_ptr, png_uint_32 asm_flags)
nuclear@2: {
nuclear@2: /* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
nuclear@2:     if (png_ptr != NULL)
nuclear@2:     png_ptr->asm_flags = 0;
nuclear@2:     asm_flags = asm_flags; /* Quiet the compiler */
nuclear@2: }
nuclear@2: 
nuclear@2: /* this function was added to libpng 1.2.0 */
nuclear@2: void PNGAPI
nuclear@2: png_set_mmx_thresholds (png_structp png_ptr,
nuclear@2:                         png_byte mmx_bitdepth_threshold,
nuclear@2:                         png_uint_32 mmx_rowbytes_threshold)
nuclear@2: {
nuclear@2: /* Obsolete as of libpng-1.2.20 and will be removed from libpng-1.4.0 */
nuclear@2:     if (png_ptr == NULL)
nuclear@2:        return;
nuclear@2:     /* Quiet the compiler */
nuclear@2:     mmx_bitdepth_threshold = mmx_bitdepth_threshold;
nuclear@2:     mmx_rowbytes_threshold = mmx_rowbytes_threshold;
nuclear@2: }
nuclear@2: #endif /* ?PNG_ASSEMBLER_CODE_SUPPORTED */
nuclear@2: 
nuclear@2: #ifdef PNG_SET_USER_LIMITS_SUPPORTED
nuclear@2: /* this function was added to libpng 1.2.6 */
nuclear@2: void PNGAPI
nuclear@2: png_set_user_limits (png_structp png_ptr, png_uint_32 user_width_max,
nuclear@2:     png_uint_32 user_height_max)
nuclear@2: {
nuclear@2:     /* Images with dimensions larger than these limits will be
nuclear@2:      * rejected by png_set_IHDR().  To accept any PNG datastream
nuclear@2:      * regardless of dimensions, set both limits to 0x7ffffffL.
nuclear@2:      */
nuclear@2:     if (png_ptr == NULL) return;
nuclear@2:     png_ptr->user_width_max = user_width_max;
nuclear@2:     png_ptr->user_height_max = user_height_max;
nuclear@2: }
nuclear@2: #endif /* ?PNG_SET_USER_LIMITS_SUPPORTED */
nuclear@2: 
nuclear@2: #endif /* ?PNG_1_0_X */
nuclear@2: #endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */