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