Glenn Randers-Pehrson | 5c6aeb2 | 1998-12-29 11:47:59 -0600 | [diff] [blame] | 1 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 2 | /* pngwrite.c - general routines to write a PNG file |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 3 | * |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 4 | * Last changed in libpng 1.2.9 March 10, 2006 |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 5 | * For conditions of distribution and use, see copyright notice in png.h |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 6 | * Copyright (c) 1998-2006 Glenn Randers-Pehrson |
Glenn Randers-Pehrson | d436672 | 2000-06-04 14:29:29 -0500 | [diff] [blame] | 7 | * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
| 8 | * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 9 | */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 10 | |
| 11 | /* get internal access to png.h */ |
| 12 | #define PNG_INTERNAL |
| 13 | #include "png.h" |
Glenn Randers-Pehrson | 1909560 | 2001-03-14 07:08:39 -0600 | [diff] [blame] | 14 | #ifdef PNG_WRITE_SUPPORTED |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 15 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 16 | /* Writes all the PNG information. This is the suggested way to use the |
| 17 | * library. If you have a new chunk to add, make a function to write it, |
| 18 | * and put it in the correct location here. If you want the chunk written |
Glenn Randers-Pehrson | 345bc27 | 1998-06-14 14:43:31 -0500 | [diff] [blame] | 19 | * after the image data, put it in png_write_end(). I strongly encourage |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 20 | * you to supply a PNG_INFO_ flag, and check info_ptr->valid before writing |
| 21 | * the chunk, as that will keep the code from breaking if you want to just |
| 22 | * write a plain PNG file. If you have long comments, I suggest writing |
| 23 | * them in png_write_end(), and compressing them. |
| 24 | */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 25 | void PNGAPI |
Glenn Randers-Pehrson | 5379b24 | 1999-11-27 10:22:33 -0600 | [diff] [blame] | 26 | png_write_info_before_PLTE(png_structp png_ptr, png_infop info_ptr) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 27 | { |
Glenn Randers-Pehrson | 5379b24 | 1999-11-27 10:22:33 -0600 | [diff] [blame] | 28 | png_debug(1, "in png_write_info_before_PLTE\n"); |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 29 | if (png_ptr == NULL || info_ptr == NULL) |
| 30 | return; |
Glenn Randers-Pehrson | 5379b24 | 1999-11-27 10:22:33 -0600 | [diff] [blame] | 31 | if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE)) |
| 32 | { |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 33 | png_write_sig(png_ptr); /* write PNG signature */ |
Glenn Randers-Pehrson | 408b421 | 2000-12-18 09:33:57 -0600 | [diff] [blame] | 34 | #if defined(PNG_MNG_FEATURES_SUPPORTED) |
| 35 | if((png_ptr->mode&PNG_HAVE_PNG_SIGNATURE)&&(png_ptr->mng_features_permitted)) |
| 36 | { |
Glenn Randers-Pehrson | c3d51c1 | 2006-03-02 07:23:18 -0600 | [diff] [blame] | 37 | png_warning(png_ptr,"MNG features are not allowed in a PNG datastream"); |
Glenn Randers-Pehrson | 408b421 | 2000-12-18 09:33:57 -0600 | [diff] [blame] | 38 | png_ptr->mng_features_permitted=0; |
| 39 | } |
| 40 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 41 | /* write IHDR information. */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 42 | png_write_IHDR(png_ptr, info_ptr->width, info_ptr->height, |
| 43 | info_ptr->bit_depth, info_ptr->color_type, info_ptr->compression_type, |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 44 | info_ptr->filter_type, |
| 45 | #if defined(PNG_WRITE_INTERLACING_SUPPORTED) |
| 46 | info_ptr->interlace_type); |
| 47 | #else |
| 48 | 0); |
| 49 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 50 | /* the rest of these check to see if the valid field has the appropriate |
| 51 | flag set, and if it does, writes the chunk. */ |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 52 | #if defined(PNG_WRITE_gAMA_SUPPORTED) |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 53 | if (info_ptr->valid & PNG_INFO_gAMA) |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 54 | { |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 55 | # ifdef PNG_FLOATING_POINT_SUPPORTED |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 56 | png_write_gAMA(png_ptr, info_ptr->gamma); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 57 | #else |
| 58 | #ifdef PNG_FIXED_POINT_SUPPORTED |
| 59 | png_write_gAMA_fixed(png_ptr, info_ptr->int_gamma); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 60 | # endif |
| 61 | #endif |
| 62 | } |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 63 | #endif |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 64 | #if defined(PNG_WRITE_sRGB_SUPPORTED) |
| 65 | if (info_ptr->valid & PNG_INFO_sRGB) |
Glenn Randers-Pehrson | c4a2ae6 | 1998-01-16 22:06:18 -0600 | [diff] [blame] | 66 | png_write_sRGB(png_ptr, (int)info_ptr->srgb_intent); |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 67 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 68 | #if defined(PNG_WRITE_iCCP_SUPPORTED) |
| 69 | if (info_ptr->valid & PNG_INFO_iCCP) |
Glenn Randers-Pehrson | 76e5fd6 | 2000-12-28 07:50:05 -0600 | [diff] [blame] | 70 | png_write_iCCP(png_ptr, info_ptr->iccp_name, PNG_COMPRESSION_TYPE_BASE, |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 71 | info_ptr->iccp_profile, (int)info_ptr->iccp_proflen); |
| 72 | #endif |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 73 | #if defined(PNG_WRITE_sBIT_SUPPORTED) |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 74 | if (info_ptr->valid & PNG_INFO_sBIT) |
| 75 | png_write_sBIT(png_ptr, &(info_ptr->sig_bit), info_ptr->color_type); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 76 | #endif |
| 77 | #if defined(PNG_WRITE_cHRM_SUPPORTED) |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 78 | if (info_ptr->valid & PNG_INFO_cHRM) |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 79 | { |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 80 | #ifdef PNG_FLOATING_POINT_SUPPORTED |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 81 | png_write_cHRM(png_ptr, |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 82 | info_ptr->x_white, info_ptr->y_white, |
| 83 | info_ptr->x_red, info_ptr->y_red, |
| 84 | info_ptr->x_green, info_ptr->y_green, |
| 85 | info_ptr->x_blue, info_ptr->y_blue); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 86 | #else |
| 87 | # ifdef PNG_FIXED_POINT_SUPPORTED |
| 88 | png_write_cHRM_fixed(png_ptr, |
| 89 | info_ptr->int_x_white, info_ptr->int_y_white, |
| 90 | info_ptr->int_x_red, info_ptr->int_y_red, |
| 91 | info_ptr->int_x_green, info_ptr->int_y_green, |
| 92 | info_ptr->int_x_blue, info_ptr->int_y_blue); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 93 | # endif |
| 94 | #endif |
| 95 | } |
| 96 | #endif |
| 97 | #if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) |
| 98 | if (info_ptr->unknown_chunks_num) |
| 99 | { |
| 100 | png_unknown_chunk *up; |
| 101 | |
| 102 | png_debug(5, "writing extra chunks\n"); |
| 103 | |
| 104 | for (up = info_ptr->unknown_chunks; |
| 105 | up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; |
| 106 | up++) |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 107 | { |
| 108 | int keep=png_handle_as_unknown(png_ptr, up->name); |
Glenn Randers-Pehrson | dff799e | 2004-08-07 21:42:49 -0500 | [diff] [blame] | 109 | if (keep != PNG_HANDLE_CHUNK_NEVER && |
Glenn Randers-Pehrson | 5b5dcf8 | 2004-07-17 22:45:44 -0500 | [diff] [blame] | 110 | up->location && !(up->location & PNG_HAVE_PLTE) && |
| 111 | !(up->location & PNG_HAVE_IDAT) && |
Glenn Randers-Pehrson | dff799e | 2004-08-07 21:42:49 -0500 | [diff] [blame] | 112 | ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 113 | (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) |
| 114 | { |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 115 | png_write_chunk(png_ptr, up->name, up->data, up->size); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 116 | } |
| 117 | } |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 118 | } |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 119 | #endif |
Glenn Randers-Pehrson | 5379b24 | 1999-11-27 10:22:33 -0600 | [diff] [blame] | 120 | png_ptr->mode |= PNG_WROTE_INFO_BEFORE_PLTE; |
| 121 | } |
| 122 | } |
| 123 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 124 | void PNGAPI |
Glenn Randers-Pehrson | 5379b24 | 1999-11-27 10:22:33 -0600 | [diff] [blame] | 125 | png_write_info(png_structp png_ptr, png_infop info_ptr) |
| 126 | { |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 127 | #if defined(PNG_WRITE_TEXT_SUPPORTED) || defined(PNG_WRITE_sPLT_SUPPORTED) |
Glenn Randers-Pehrson | 5379b24 | 1999-11-27 10:22:33 -0600 | [diff] [blame] | 128 | int i; |
| 129 | #endif |
| 130 | |
| 131 | png_debug(1, "in png_write_info\n"); |
| 132 | |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 133 | if (png_ptr == NULL || info_ptr == NULL) |
| 134 | return; |
| 135 | |
Glenn Randers-Pehrson | 5379b24 | 1999-11-27 10:22:33 -0600 | [diff] [blame] | 136 | png_write_info_before_PLTE(png_ptr, info_ptr); |
| 137 | |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 138 | if (info_ptr->valid & PNG_INFO_PLTE) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 139 | png_write_PLTE(png_ptr, info_ptr->palette, |
| 140 | (png_uint_32)info_ptr->num_palette); |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 141 | else if (info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
Glenn Randers-Pehrson | c3d51c1 | 2006-03-02 07:23:18 -0600 | [diff] [blame] | 142 | png_error(png_ptr, "Valid palette required for paletted images"); |
Glenn Randers-Pehrson | c4a2ae6 | 1998-01-16 22:06:18 -0600 | [diff] [blame] | 143 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 144 | #if defined(PNG_WRITE_tRNS_SUPPORTED) |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 145 | if (info_ptr->valid & PNG_INFO_tRNS) |
Glenn Randers-Pehrson | c4a2ae6 | 1998-01-16 22:06:18 -0600 | [diff] [blame] | 146 | { |
| 147 | #if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) |
| 148 | /* invert the alpha channel (in tRNS) */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 149 | if ((png_ptr->transformations & PNG_INVERT_ALPHA) && |
Glenn Randers-Pehrson | c4a2ae6 | 1998-01-16 22:06:18 -0600 | [diff] [blame] | 150 | info_ptr->color_type == PNG_COLOR_TYPE_PALETTE) |
| 151 | { |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 152 | int j; |
Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 153 | for (j=0; j<(int)info_ptr->num_trans; j++) |
Glenn Randers-Pehrson | 860ab2b | 1999-10-14 07:43:10 -0500 | [diff] [blame] | 154 | info_ptr->trans[j] = (png_byte)(255 - info_ptr->trans[j]); |
Glenn Randers-Pehrson | c4a2ae6 | 1998-01-16 22:06:18 -0600 | [diff] [blame] | 155 | } |
| 156 | #endif |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 157 | png_write_tRNS(png_ptr, info_ptr->trans, &(info_ptr->trans_values), |
| 158 | info_ptr->num_trans, info_ptr->color_type); |
Glenn Randers-Pehrson | c4a2ae6 | 1998-01-16 22:06:18 -0600 | [diff] [blame] | 159 | } |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 160 | #endif |
| 161 | #if defined(PNG_WRITE_bKGD_SUPPORTED) |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 162 | if (info_ptr->valid & PNG_INFO_bKGD) |
| 163 | png_write_bKGD(png_ptr, &(info_ptr->background), info_ptr->color_type); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 164 | #endif |
| 165 | #if defined(PNG_WRITE_hIST_SUPPORTED) |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 166 | if (info_ptr->valid & PNG_INFO_hIST) |
| 167 | png_write_hIST(png_ptr, info_ptr->hist, info_ptr->num_palette); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 168 | #endif |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 169 | #if defined(PNG_WRITE_oFFs_SUPPORTED) |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 170 | if (info_ptr->valid & PNG_INFO_oFFs) |
| 171 | png_write_oFFs(png_ptr, info_ptr->x_offset, info_ptr->y_offset, |
| 172 | info_ptr->offset_unit_type); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 173 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 174 | #if defined(PNG_WRITE_pCAL_SUPPORTED) |
| 175 | if (info_ptr->valid & PNG_INFO_pCAL) |
| 176 | png_write_pCAL(png_ptr, info_ptr->pcal_purpose, info_ptr->pcal_X0, |
| 177 | info_ptr->pcal_X1, info_ptr->pcal_type, info_ptr->pcal_nparams, |
| 178 | info_ptr->pcal_units, info_ptr->pcal_params); |
| 179 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 180 | #if defined(PNG_WRITE_sCAL_SUPPORTED) |
| 181 | if (info_ptr->valid & PNG_INFO_sCAL) |
Glenn Randers-Pehrson | 68ea243 | 2000-04-01 21:10:05 -0600 | [diff] [blame] | 182 | #if defined(PNG_FLOATING_POINT_SUPPORTED) && !defined(PNG_NO_STDIO) |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 183 | png_write_sCAL(png_ptr, (int)info_ptr->scal_unit, |
| 184 | info_ptr->scal_pixel_width, info_ptr->scal_pixel_height); |
| 185 | #else |
| 186 | #ifdef PNG_FIXED_POINT_SUPPORTED |
| 187 | png_write_sCAL_s(png_ptr, (int)info_ptr->scal_unit, |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 188 | info_ptr->scal_s_width, info_ptr->scal_s_height); |
Glenn Randers-Pehrson | 68ea243 | 2000-04-01 21:10:05 -0600 | [diff] [blame] | 189 | #else |
| 190 | png_warning(png_ptr, |
Glenn Randers-Pehrson | c3d51c1 | 2006-03-02 07:23:18 -0600 | [diff] [blame] | 191 | "png_write_sCAL not supported; sCAL chunk not written."); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 192 | #endif |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 193 | #endif |
| 194 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 195 | #if defined(PNG_WRITE_pHYs_SUPPORTED) |
| 196 | if (info_ptr->valid & PNG_INFO_pHYs) |
| 197 | png_write_pHYs(png_ptr, info_ptr->x_pixels_per_unit, |
| 198 | info_ptr->y_pixels_per_unit, info_ptr->phys_unit_type); |
| 199 | #endif |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 200 | #if defined(PNG_WRITE_tIME_SUPPORTED) |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 201 | if (info_ptr->valid & PNG_INFO_tIME) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 202 | { |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 203 | png_write_tIME(png_ptr, &(info_ptr->mod_time)); |
Glenn Randers-Pehrson | 5379b24 | 1999-11-27 10:22:33 -0600 | [diff] [blame] | 204 | png_ptr->mode |= PNG_WROTE_tIME; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 205 | } |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 206 | #endif |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 207 | #if defined(PNG_WRITE_sPLT_SUPPORTED) |
| 208 | if (info_ptr->valid & PNG_INFO_sPLT) |
| 209 | for (i = 0; i < (int)info_ptr->splt_palettes_num; i++) |
| 210 | png_write_sPLT(png_ptr, info_ptr->splt_palettes + i); |
| 211 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 212 | #if defined(PNG_WRITE_TEXT_SUPPORTED) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 213 | /* Check to see if we need to write text chunks */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 214 | for (i = 0; i < info_ptr->num_text; i++) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 215 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 216 | png_debug2(2, "Writing header text chunk %d, type %d\n", i, |
| 217 | info_ptr->text[i].compression); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 218 | /* an internationalized chunk? */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 219 | if (info_ptr->text[i].compression > 0) |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 220 | { |
| 221 | #if defined(PNG_WRITE_iTXt_SUPPORTED) |
| 222 | /* write international chunk */ |
| 223 | png_write_iTXt(png_ptr, |
| 224 | info_ptr->text[i].compression, |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 225 | info_ptr->text[i].key, |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 226 | info_ptr->text[i].lang, |
| 227 | info_ptr->text[i].lang_key, |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 228 | info_ptr->text[i].text); |
| 229 | #else |
Glenn Randers-Pehrson | c3d51c1 | 2006-03-02 07:23:18 -0600 | [diff] [blame] | 230 | png_warning(png_ptr, "Unable to write international text"); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 231 | #endif |
| 232 | /* Mark this chunk as written */ |
| 233 | info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; |
| 234 | } |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 235 | /* If we want a compressed text chunk */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 236 | else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_zTXt) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 237 | { |
| 238 | #if defined(PNG_WRITE_zTXt_SUPPORTED) |
| 239 | /* write compressed chunk */ |
| 240 | png_write_zTXt(png_ptr, info_ptr->text[i].key, |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 241 | info_ptr->text[i].text, 0, |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 242 | info_ptr->text[i].compression); |
| 243 | #else |
Glenn Randers-Pehrson | c3d51c1 | 2006-03-02 07:23:18 -0600 | [diff] [blame] | 244 | png_warning(png_ptr, "Unable to write compressed text"); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 245 | #endif |
| 246 | /* Mark this chunk as written */ |
| 247 | info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR; |
| 248 | } |
| 249 | else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE) |
| 250 | { |
| 251 | #if defined(PNG_WRITE_tEXt_SUPPORTED) |
| 252 | /* write uncompressed chunk */ |
| 253 | png_write_tEXt(png_ptr, info_ptr->text[i].key, |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 254 | info_ptr->text[i].text, |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 255 | 0); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 256 | #else |
Glenn Randers-Pehrson | c3d51c1 | 2006-03-02 07:23:18 -0600 | [diff] [blame] | 257 | png_warning(png_ptr, "Unable to write uncompressed text"); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 258 | #endif |
| 259 | /* Mark this chunk as written */ |
| 260 | info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; |
| 261 | } |
| 262 | } |
| 263 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 264 | #if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) |
| 265 | if (info_ptr->unknown_chunks_num) |
| 266 | { |
| 267 | png_unknown_chunk *up; |
| 268 | |
| 269 | png_debug(5, "writing extra chunks\n"); |
| 270 | |
| 271 | for (up = info_ptr->unknown_chunks; |
| 272 | up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; |
| 273 | up++) |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 274 | { |
| 275 | int keep=png_handle_as_unknown(png_ptr, up->name); |
Glenn Randers-Pehrson | dff799e | 2004-08-07 21:42:49 -0500 | [diff] [blame] | 276 | if (keep != PNG_HANDLE_CHUNK_NEVER && |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 277 | up->location && (up->location & PNG_HAVE_PLTE) && |
| 278 | !(up->location & PNG_HAVE_IDAT) && |
Glenn Randers-Pehrson | dff799e | 2004-08-07 21:42:49 -0500 | [diff] [blame] | 279 | ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 280 | (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) |
| 281 | { |
| 282 | png_write_chunk(png_ptr, up->name, up->data, up->size); |
| 283 | } |
| 284 | } |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 285 | } |
| 286 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 287 | } |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 288 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 289 | /* Writes the end of the PNG file. If you don't want to write comments or |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 290 | * time information, you can pass NULL for info. If you already wrote these |
| 291 | * in png_write_info(), do not write them again here. If you have long |
| 292 | * comments, I suggest writing them here, and compressing them. |
| 293 | */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 294 | void PNGAPI |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 295 | png_write_end(png_structp png_ptr, png_infop info_ptr) |
| 296 | { |
| 297 | png_debug(1, "in png_write_end\n"); |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 298 | if (png_ptr == NULL) |
| 299 | return; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 300 | if (!(png_ptr->mode & PNG_HAVE_IDAT)) |
| 301 | png_error(png_ptr, "No IDATs written into file"); |
| 302 | |
| 303 | /* see if user wants us to write information chunks */ |
| 304 | if (info_ptr != NULL) |
| 305 | { |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 306 | #if defined(PNG_WRITE_TEXT_SUPPORTED) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 307 | int i; /* local index variable */ |
Glenn Randers-Pehrson | 70e3f54 | 1998-01-03 22:40:55 -0600 | [diff] [blame] | 308 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 309 | #if defined(PNG_WRITE_tIME_SUPPORTED) |
| 310 | /* check to see if user has supplied a time chunk */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 311 | if ((info_ptr->valid & PNG_INFO_tIME) && |
Glenn Randers-Pehrson | 5379b24 | 1999-11-27 10:22:33 -0600 | [diff] [blame] | 312 | !(png_ptr->mode & PNG_WROTE_tIME)) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 313 | png_write_tIME(png_ptr, &(info_ptr->mod_time)); |
| 314 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 315 | #if defined(PNG_WRITE_TEXT_SUPPORTED) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 316 | /* loop through comment chunks */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 317 | for (i = 0; i < info_ptr->num_text; i++) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 318 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 319 | png_debug2(2, "Writing trailer text chunk %d, type %d\n", i, |
| 320 | info_ptr->text[i].compression); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 321 | /* an internationalized chunk? */ |
| 322 | if (info_ptr->text[i].compression > 0) |
| 323 | { |
| 324 | #if defined(PNG_WRITE_iTXt_SUPPORTED) |
| 325 | /* write international chunk */ |
| 326 | png_write_iTXt(png_ptr, |
| 327 | info_ptr->text[i].compression, |
| 328 | info_ptr->text[i].key, |
| 329 | info_ptr->text[i].lang, |
| 330 | info_ptr->text[i].lang_key, |
| 331 | info_ptr->text[i].text); |
| 332 | #else |
Glenn Randers-Pehrson | c3d51c1 | 2006-03-02 07:23:18 -0600 | [diff] [blame] | 333 | png_warning(png_ptr, "Unable to write international text"); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 334 | #endif |
| 335 | /* Mark this chunk as written */ |
| 336 | info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; |
| 337 | } |
| 338 | else if (info_ptr->text[i].compression >= PNG_TEXT_COMPRESSION_zTXt) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 339 | { |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 340 | #if defined(PNG_WRITE_zTXt_SUPPORTED) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 341 | /* write compressed chunk */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 342 | png_write_zTXt(png_ptr, info_ptr->text[i].key, |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 343 | info_ptr->text[i].text, 0, |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 344 | info_ptr->text[i].compression); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 345 | #else |
Glenn Randers-Pehrson | c3d51c1 | 2006-03-02 07:23:18 -0600 | [diff] [blame] | 346 | png_warning(png_ptr, "Unable to write compressed text"); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 347 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 348 | /* Mark this chunk as written */ |
| 349 | info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_zTXt_WR; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 350 | } |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 351 | else if (info_ptr->text[i].compression == PNG_TEXT_COMPRESSION_NONE) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 352 | { |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 353 | #if defined(PNG_WRITE_tEXt_SUPPORTED) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 354 | /* write uncompressed chunk */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 355 | png_write_tEXt(png_ptr, info_ptr->text[i].key, |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 356 | info_ptr->text[i].text, 0); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 357 | #else |
Glenn Randers-Pehrson | c3d51c1 | 2006-03-02 07:23:18 -0600 | [diff] [blame] | 358 | png_warning(png_ptr, "Unable to write uncompressed text"); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 359 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 360 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 361 | /* Mark this chunk as written */ |
| 362 | info_ptr->text[i].compression = PNG_TEXT_COMPRESSION_NONE_WR; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 363 | } |
| 364 | } |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 365 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 366 | #if defined(PNG_WRITE_UNKNOWN_CHUNKS_SUPPORTED) |
| 367 | if (info_ptr->unknown_chunks_num) |
| 368 | { |
| 369 | png_unknown_chunk *up; |
| 370 | |
| 371 | png_debug(5, "writing extra chunks\n"); |
| 372 | |
| 373 | for (up = info_ptr->unknown_chunks; |
| 374 | up < info_ptr->unknown_chunks + info_ptr->unknown_chunks_num; |
| 375 | up++) |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 376 | { |
| 377 | int keep=png_handle_as_unknown(png_ptr, up->name); |
Glenn Randers-Pehrson | dff799e | 2004-08-07 21:42:49 -0500 | [diff] [blame] | 378 | if (keep != PNG_HANDLE_CHUNK_NEVER && |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 379 | up->location && (up->location & PNG_AFTER_IDAT) && |
Glenn Randers-Pehrson | dff799e | 2004-08-07 21:42:49 -0500 | [diff] [blame] | 380 | ((up->name[3] & 0x20) || keep == PNG_HANDLE_CHUNK_ALWAYS || |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 381 | (png_ptr->flags & PNG_FLAG_KEEP_UNSAFE_CHUNKS))) |
| 382 | { |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 383 | png_write_chunk(png_ptr, up->name, up->data, up->size); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 384 | } |
| 385 | } |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 386 | } |
| 387 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 388 | } |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 389 | |
| 390 | png_ptr->mode |= PNG_AFTER_IDAT; |
| 391 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 392 | /* write end of PNG file */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 393 | png_write_IEND(png_ptr); |
Glenn Randers-Pehrson | d56aca7 | 2000-11-23 11:51:42 -0600 | [diff] [blame] | 394 | #if 0 |
| 395 | /* This flush, added in libpng-1.0.8, causes some applications to crash |
| 396 | because they do not set png_ptr->output_flush_fn */ |
Glenn Randers-Pehrson | 32fc5ce | 2000-07-24 06:34:14 -0500 | [diff] [blame] | 397 | png_flush(png_ptr); |
Glenn Randers-Pehrson | d56aca7 | 2000-11-23 11:51:42 -0600 | [diff] [blame] | 398 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 399 | } |
| 400 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 401 | #if defined(PNG_WRITE_tIME_SUPPORTED) |
Glenn Randers-Pehrson | 316f97a | 2000-07-08 13:19:41 -0500 | [diff] [blame] | 402 | #if !defined(_WIN32_WCE) |
| 403 | /* "time.h" functions are not supported on WindowsCE */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 404 | void PNGAPI |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 405 | png_convert_from_struct_tm(png_timep ptime, struct tm FAR * ttime) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 406 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 407 | png_debug(1, "in png_convert_from_struct_tm\n"); |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 408 | ptime->year = (png_uint_16)(1900 + ttime->tm_year); |
| 409 | ptime->month = (png_byte)(ttime->tm_mon + 1); |
| 410 | ptime->day = (png_byte)ttime->tm_mday; |
| 411 | ptime->hour = (png_byte)ttime->tm_hour; |
| 412 | ptime->minute = (png_byte)ttime->tm_min; |
| 413 | ptime->second = (png_byte)ttime->tm_sec; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 414 | } |
| 415 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 416 | void PNGAPI |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 417 | png_convert_from_time_t(png_timep ptime, time_t ttime) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 418 | { |
| 419 | struct tm *tbuf; |
| 420 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 421 | png_debug(1, "in png_convert_from_time_t\n"); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 422 | tbuf = gmtime(&ttime); |
| 423 | png_convert_from_struct_tm(ptime, tbuf); |
| 424 | } |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 425 | #endif |
Glenn Randers-Pehrson | 316f97a | 2000-07-08 13:19:41 -0500 | [diff] [blame] | 426 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 427 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 428 | /* Initialize png_ptr structure, and allocate any memory needed */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 429 | png_structp PNGAPI |
Glenn Randers-Pehrson | d0dce40 | 1998-05-09 10:02:29 -0500 | [diff] [blame] | 430 | png_create_write_struct(png_const_charp user_png_ver, png_voidp error_ptr, |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 431 | png_error_ptr error_fn, png_error_ptr warn_fn) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 432 | { |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 433 | #ifdef PNG_USER_MEM_SUPPORTED |
| 434 | return (png_create_write_struct_2(user_png_ver, error_ptr, error_fn, |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 435 | warn_fn, png_voidp_NULL, png_malloc_ptr_NULL, png_free_ptr_NULL)); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 436 | } |
| 437 | |
| 438 | /* Alternate initialize png_ptr structure, and allocate any memory needed */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 439 | png_structp PNGAPI |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 440 | png_create_write_struct_2(png_const_charp user_png_ver, png_voidp error_ptr, |
| 441 | png_error_ptr error_fn, png_error_ptr warn_fn, png_voidp mem_ptr, |
| 442 | png_malloc_ptr malloc_fn, png_free_ptr free_fn) |
| 443 | { |
| 444 | #endif /* PNG_USER_MEM_SUPPORTED */ |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 445 | png_structp png_ptr; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 446 | #ifdef PNG_SETJMP_SUPPORTED |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 447 | #ifdef USE_FAR_KEYWORD |
| 448 | jmp_buf jmpbuf; |
| 449 | #endif |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 450 | #endif |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 451 | int i; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 452 | png_debug(1, "in png_create_write_struct\n"); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 453 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 454 | png_ptr = (png_structp)png_create_struct_2(PNG_STRUCT_PNG, |
| 455 | (png_malloc_ptr)malloc_fn, (png_voidp)mem_ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 456 | #else |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 457 | png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 458 | #endif /* PNG_USER_MEM_SUPPORTED */ |
Glenn Randers-Pehrson | 9c0f094 | 2002-02-21 23:14:23 -0600 | [diff] [blame] | 459 | if (png_ptr == NULL) |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 460 | return (NULL); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 461 | |
Glenn Randers-Pehrson | 73d57cb | 2002-03-25 18:49:08 -0600 | [diff] [blame] | 462 | #if !defined(PNG_1_0_X) |
Glenn Randers-Pehrson | 1fd5fb3 | 2001-05-06 05:34:26 -0500 | [diff] [blame] | 463 | #ifdef PNG_ASSEMBLER_CODE_SUPPORTED |
| 464 | png_init_mmx_flags(png_ptr); /* 1.2.0 addition */ |
| 465 | #endif |
Glenn Randers-Pehrson | 73d57cb | 2002-03-25 18:49:08 -0600 | [diff] [blame] | 466 | #endif /* PNG_1_0_X */ |
Glenn Randers-Pehrson | 1fd5fb3 | 2001-05-06 05:34:26 -0500 | [diff] [blame] | 467 | |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 468 | /* added at libpng-1.2.6 */ |
| 469 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED |
| 470 | png_ptr->user_width_max=PNG_USER_WIDTH_MAX; |
| 471 | png_ptr->user_height_max=PNG_USER_HEIGHT_MAX; |
| 472 | #endif |
| 473 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 474 | #ifdef PNG_SETJMP_SUPPORTED |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 475 | #ifdef USE_FAR_KEYWORD |
| 476 | if (setjmp(jmpbuf)) |
| 477 | #else |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 478 | if (setjmp(png_ptr->jmpbuf)) |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 479 | #endif |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 480 | { |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 481 | png_free(png_ptr, png_ptr->zbuf); |
Glenn Randers-Pehrson | 4766a24 | 2000-07-17 06:17:09 -0500 | [diff] [blame] | 482 | png_ptr->zbuf=NULL; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 483 | png_destroy_struct(png_ptr); |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 484 | return (NULL); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 485 | } |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 486 | #ifdef USE_FAR_KEYWORD |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 487 | png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf)); |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 488 | #endif |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 489 | #endif |
| 490 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 491 | #ifdef PNG_USER_MEM_SUPPORTED |
| 492 | png_set_mem_fn(png_ptr, mem_ptr, malloc_fn, free_fn); |
| 493 | #endif /* PNG_USER_MEM_SUPPORTED */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 494 | png_set_error_fn(png_ptr, error_ptr, error_fn, warn_fn); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 495 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 496 | i=0; |
| 497 | do |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 498 | { |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 499 | if(user_png_ver[i] != png_libpng_ver[i]) |
| 500 | png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; |
| 501 | } while (png_libpng_ver[i++]); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 502 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 503 | if (png_ptr->flags & PNG_FLAG_LIBRARY_MISMATCH) |
Glenn Randers-Pehrson | 98c9d73 | 2000-05-03 21:06:11 -0500 | [diff] [blame] | 504 | { |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 505 | /* Libpng 0.90 and later are binary incompatible with libpng 0.89, so |
| 506 | * we must recompile any applications that use any older library version. |
| 507 | * For versions after libpng 1.0, we will be compatible, so we need |
| 508 | * only check the first digit. |
| 509 | */ |
| 510 | if (user_png_ver == NULL || user_png_ver[0] != png_libpng_ver[0] || |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 511 | (user_png_ver[0] == '1' && user_png_ver[2] != png_libpng_ver[2]) || |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 512 | (user_png_ver[0] == '0' && user_png_ver[2] < '9')) |
| 513 | { |
Glenn Randers-Pehrson | b182893 | 2001-06-23 08:03:17 -0500 | [diff] [blame] | 514 | #if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE) |
| 515 | char msg[80]; |
| 516 | if (user_png_ver) |
| 517 | { |
| 518 | sprintf(msg, "Application was compiled with png.h from libpng-%.20s", |
| 519 | user_png_ver); |
| 520 | png_warning(png_ptr, msg); |
| 521 | } |
Glenn Randers-Pehrson | 5cded0b | 2001-11-07 07:10:08 -0600 | [diff] [blame] | 522 | sprintf(msg, "Application is running with png.c from libpng-%.20s", |
Glenn Randers-Pehrson | b182893 | 2001-06-23 08:03:17 -0500 | [diff] [blame] | 523 | png_libpng_ver); |
| 524 | png_warning(png_ptr, msg); |
| 525 | #endif |
| 526 | #ifdef PNG_ERROR_NUMBERS_SUPPORTED |
| 527 | png_ptr->flags=0; |
| 528 | #endif |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 529 | png_error(png_ptr, |
| 530 | "Incompatible libpng version in application and library"); |
| 531 | } |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 532 | } |
Glenn Randers-Pehrson | 98c9d73 | 2000-05-03 21:06:11 -0500 | [diff] [blame] | 533 | |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 534 | /* initialize zbuf - compression buffer */ |
| 535 | png_ptr->zbuf_size = PNG_ZBUF_SIZE; |
Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 536 | png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, |
| 537 | (png_uint_32)png_ptr->zbuf_size); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 538 | |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 539 | png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL, |
| 540 | png_flush_ptr_NULL); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 541 | |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 542 | #if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) |
| 543 | png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT, |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 544 | 1, png_doublep_NULL, png_doublep_NULL); |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 545 | #endif |
| 546 | |
Glenn Randers-Pehrson | 03008a0 | 2002-04-27 10:11:25 -0500 | [diff] [blame] | 547 | #ifdef PNG_SETJMP_SUPPORTED |
| 548 | /* Applications that neglect to set up their own setjmp() and then encounter |
| 549 | a png_error() will longjmp here. Since the jmpbuf is then meaningless we |
| 550 | abort instead of returning. */ |
| 551 | #ifdef USE_FAR_KEYWORD |
| 552 | if (setjmp(jmpbuf)) |
| 553 | PNG_ABORT(); |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 554 | png_memcpy(png_ptr->jmpbuf,jmpbuf,png_sizeof(jmp_buf)); |
Glenn Randers-Pehrson | 03008a0 | 2002-04-27 10:11:25 -0500 | [diff] [blame] | 555 | #else |
| 556 | if (setjmp(png_ptr->jmpbuf)) |
| 557 | PNG_ABORT(); |
| 558 | #endif |
| 559 | #endif |
| 560 | return (png_ptr); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 561 | } |
| 562 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 563 | /* Initialize png_ptr structure, and allocate any memory needed */ |
Glenn Randers-Pehrson | 1ce0836 | 2006-03-08 23:35:59 -0600 | [diff] [blame] | 564 | #if defined(PNG_1_0_X) || defined(PNG_1_2_X) |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 565 | /* Deprecated. */ |
Glenn Randers-Pehrson | 98c9d73 | 2000-05-03 21:06:11 -0500 | [diff] [blame] | 566 | #undef png_write_init |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 567 | void PNGAPI |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 568 | png_write_init(png_structp png_ptr) |
| 569 | { |
Glenn Randers-Pehrson | 98c9d73 | 2000-05-03 21:06:11 -0500 | [diff] [blame] | 570 | /* We only come here via pre-1.0.7-compiled applications */ |
Glenn Randers-Pehrson | b182893 | 2001-06-23 08:03:17 -0500 | [diff] [blame] | 571 | png_write_init_2(png_ptr, "1.0.6 or earlier", 0, 0); |
Glenn Randers-Pehrson | 98c9d73 | 2000-05-03 21:06:11 -0500 | [diff] [blame] | 572 | } |
| 573 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 574 | void PNGAPI |
Glenn Randers-Pehrson | 98c9d73 | 2000-05-03 21:06:11 -0500 | [diff] [blame] | 575 | png_write_init_2(png_structp png_ptr, png_const_charp user_png_ver, |
| 576 | png_size_t png_struct_size, png_size_t png_info_size) |
| 577 | { |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 578 | /* We only come here via pre-1.0.12-compiled applications */ |
Glenn Randers-Pehrson | b182893 | 2001-06-23 08:03:17 -0500 | [diff] [blame] | 579 | #if !defined(PNG_NO_STDIO) && !defined(_WIN32_WCE) |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 580 | if(png_sizeof(png_struct) > png_struct_size || |
| 581 | png_sizeof(png_info) > png_info_size) |
Glenn Randers-Pehrson | b182893 | 2001-06-23 08:03:17 -0500 | [diff] [blame] | 582 | { |
| 583 | char msg[80]; |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 584 | png_ptr->warning_fn=NULL; |
Glenn Randers-Pehrson | b182893 | 2001-06-23 08:03:17 -0500 | [diff] [blame] | 585 | if (user_png_ver) |
| 586 | { |
| 587 | sprintf(msg, "Application was compiled with png.h from libpng-%.20s", |
| 588 | user_png_ver); |
| 589 | png_warning(png_ptr, msg); |
| 590 | } |
Glenn Randers-Pehrson | 5cded0b | 2001-11-07 07:10:08 -0600 | [diff] [blame] | 591 | sprintf(msg, "Application is running with png.c from libpng-%.20s", |
Glenn Randers-Pehrson | b182893 | 2001-06-23 08:03:17 -0500 | [diff] [blame] | 592 | png_libpng_ver); |
| 593 | png_warning(png_ptr, msg); |
| 594 | } |
| 595 | #endif |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 596 | if(png_sizeof(png_struct) > png_struct_size) |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 597 | { |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 598 | png_ptr->error_fn=NULL; |
Glenn Randers-Pehrson | b182893 | 2001-06-23 08:03:17 -0500 | [diff] [blame] | 599 | #ifdef PNG_ERROR_NUMBERS_SUPPORTED |
| 600 | png_ptr->flags=0; |
| 601 | #endif |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 602 | png_error(png_ptr, |
Glenn Randers-Pehrson | b182893 | 2001-06-23 08:03:17 -0500 | [diff] [blame] | 603 | "The png struct allocated by the application for writing is too small."); |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 604 | } |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 605 | if(png_sizeof(png_info) > png_info_size) |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 606 | { |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 607 | png_ptr->error_fn=NULL; |
Glenn Randers-Pehrson | b182893 | 2001-06-23 08:03:17 -0500 | [diff] [blame] | 608 | #ifdef PNG_ERROR_NUMBERS_SUPPORTED |
| 609 | png_ptr->flags=0; |
| 610 | #endif |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 611 | png_error(png_ptr, |
Glenn Randers-Pehrson | b182893 | 2001-06-23 08:03:17 -0500 | [diff] [blame] | 612 | "The info struct allocated by the application for writing is too small."); |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 613 | } |
| 614 | png_write_init_3(&png_ptr, user_png_ver, png_struct_size); |
| 615 | } |
Glenn Randers-Pehrson | 9c3ab68 | 2006-02-20 22:09:05 -0600 | [diff] [blame] | 616 | #endif /* PNG_1_0_X || PNG_1_2_X */ |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 617 | |
| 618 | |
| 619 | void PNGAPI |
| 620 | png_write_init_3(png_structpp ptr_ptr, png_const_charp user_png_ver, |
| 621 | png_size_t png_struct_size) |
| 622 | { |
| 623 | png_structp png_ptr=*ptr_ptr; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 624 | #ifdef PNG_SETJMP_SUPPORTED |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 625 | jmp_buf tmp_jmp; /* to save current jump buffer */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 626 | #endif |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 627 | |
| 628 | if (png_ptr == NULL) |
| 629 | return; |
| 630 | |
Glenn Randers-Pehrson | 98c9d73 | 2000-05-03 21:06:11 -0500 | [diff] [blame] | 631 | int i = 0; |
| 632 | do |
| 633 | { |
| 634 | if (user_png_ver[i] != png_libpng_ver[i]) |
| 635 | { |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 636 | #ifdef PNG_LEGACY_SUPPORTED |
| 637 | png_ptr->flags |= PNG_FLAG_LIBRARY_MISMATCH; |
| 638 | #else |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 639 | png_ptr->warning_fn=NULL; |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 640 | png_warning(png_ptr, |
| 641 | "Application uses deprecated png_write_init() and should be recompiled."); |
| 642 | break; |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 643 | #endif |
Glenn Randers-Pehrson | 98c9d73 | 2000-05-03 21:06:11 -0500 | [diff] [blame] | 644 | } |
| 645 | } while (png_libpng_ver[i++]); |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 646 | |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 647 | png_debug(1, "in png_write_init_3\n"); |
Glenn Randers-Pehrson | 98c9d73 | 2000-05-03 21:06:11 -0500 | [diff] [blame] | 648 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 649 | #ifdef PNG_SETJMP_SUPPORTED |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 650 | /* save jump buffer and error functions */ |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 651 | png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof (jmp_buf)); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 652 | #endif |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 653 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 654 | if (png_sizeof(png_struct) > png_struct_size) |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 655 | { |
| 656 | png_destroy_struct(png_ptr); |
| 657 | png_ptr = (png_structp)png_create_struct(PNG_STRUCT_PNG); |
| 658 | *ptr_ptr = png_ptr; |
| 659 | } |
| 660 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 661 | /* reset all variables to 0 */ |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 662 | png_memset(png_ptr, 0, png_sizeof (png_struct)); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 663 | |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 664 | /* added at libpng-1.2.6 */ |
| 665 | #ifdef PNG_SET_USER_LIMITS_SUPPORTED |
| 666 | png_ptr->user_width_max=PNG_USER_WIDTH_MAX; |
| 667 | png_ptr->user_height_max=PNG_USER_HEIGHT_MAX; |
| 668 | #endif |
| 669 | |
Glenn Randers-Pehrson | 73d57cb | 2002-03-25 18:49:08 -0600 | [diff] [blame] | 670 | #if !defined(PNG_1_0_X) |
Glenn Randers-Pehrson | 1fd5fb3 | 2001-05-06 05:34:26 -0500 | [diff] [blame] | 671 | #ifdef PNG_ASSEMBLER_CODE_SUPPORTED |
| 672 | png_init_mmx_flags(png_ptr); /* 1.2.0 addition */ |
| 673 | #endif |
Glenn Randers-Pehrson | 73d57cb | 2002-03-25 18:49:08 -0600 | [diff] [blame] | 674 | #endif /* PNG_1_0_X */ |
Glenn Randers-Pehrson | 1fd5fb3 | 2001-05-06 05:34:26 -0500 | [diff] [blame] | 675 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 676 | #ifdef PNG_SETJMP_SUPPORTED |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 677 | /* restore jump buffer */ |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 678 | png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof (jmp_buf)); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 679 | #endif |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 680 | |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 681 | png_set_write_fn(png_ptr, png_voidp_NULL, png_rw_ptr_NULL, |
| 682 | png_flush_ptr_NULL); |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 683 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 684 | /* initialize zbuf - compression buffer */ |
| 685 | png_ptr->zbuf_size = PNG_ZBUF_SIZE; |
Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 686 | png_ptr->zbuf = (png_bytep)png_malloc(png_ptr, |
| 687 | (png_uint_32)png_ptr->zbuf_size); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 688 | |
| 689 | #if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) |
| 690 | png_set_filter_heuristics(png_ptr, PNG_FILTER_HEURISTIC_DEFAULT, |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 691 | 1, png_doublep_NULL, png_doublep_NULL); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 692 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 693 | } |
| 694 | |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 695 | /* Write a few rows of image data. If the image is interlaced, |
| 696 | * either you will have to write the 7 sub images, or, if you |
| 697 | * have called png_set_interlace_handling(), you will have to |
| 698 | * "write" the image seven times. |
| 699 | */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 700 | void PNGAPI |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 701 | png_write_rows(png_structp png_ptr, png_bytepp row, |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 702 | png_uint_32 num_rows) |
| 703 | { |
| 704 | png_uint_32 i; /* row counter */ |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 705 | png_bytepp rp; /* row pointer */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 706 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 707 | png_debug(1, "in png_write_rows\n"); |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 708 | |
| 709 | if (png_ptr == NULL) |
| 710 | return; |
| 711 | |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 712 | /* loop through the rows */ |
| 713 | for (i = 0, rp = row; i < num_rows; i++, rp++) |
| 714 | { |
| 715 | png_write_row(png_ptr, *rp); |
| 716 | } |
| 717 | } |
| 718 | |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 719 | /* Write the image. You only need to call this function once, even |
| 720 | * if you are writing an interlaced image. |
| 721 | */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 722 | void PNGAPI |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 723 | png_write_image(png_structp png_ptr, png_bytepp image) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 724 | { |
| 725 | png_uint_32 i; /* row index */ |
| 726 | int pass, num_pass; /* pass variables */ |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 727 | png_bytepp rp; /* points to current row */ |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 728 | |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 729 | if (png_ptr == NULL) |
| 730 | return; |
| 731 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 732 | png_debug(1, "in png_write_image\n"); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 733 | #if defined(PNG_WRITE_INTERLACING_SUPPORTED) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 734 | /* intialize interlace handling. If image is not interlaced, |
| 735 | this will set pass to 1 */ |
| 736 | num_pass = png_set_interlace_handling(png_ptr); |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 737 | #else |
| 738 | num_pass = 1; |
| 739 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 740 | /* loop through passes */ |
| 741 | for (pass = 0; pass < num_pass; pass++) |
| 742 | { |
| 743 | /* loop through image */ |
| 744 | for (i = 0, rp = image; i < png_ptr->height; i++, rp++) |
| 745 | { |
| 746 | png_write_row(png_ptr, *rp); |
| 747 | } |
| 748 | } |
| 749 | } |
| 750 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 751 | /* called by user to write a row of image data */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 752 | void PNGAPI |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 753 | png_write_row(png_structp png_ptr, png_bytep row) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 754 | { |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 755 | if (png_ptr == NULL) |
| 756 | return; |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 757 | png_debug2(1, "in png_write_row (row %ld, pass %d)\n", |
| 758 | png_ptr->row_number, png_ptr->pass); |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 759 | |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 760 | /* initialize transformations and other stuff if first time */ |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 761 | if (png_ptr->row_number == 0 && png_ptr->pass == 0) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 762 | { |
Glenn Randers-Pehrson | 5cded0b | 2001-11-07 07:10:08 -0600 | [diff] [blame] | 763 | /* make sure we wrote the header info */ |
| 764 | if (!(png_ptr->mode & PNG_WROTE_INFO_BEFORE_PLTE)) |
| 765 | png_error(png_ptr, |
| 766 | "png_write_info was never called before png_write_row."); |
| 767 | |
Glenn Randers-Pehrson | 1d96361 | 1998-05-02 12:52:25 -0500 | [diff] [blame] | 768 | /* check for transforms that have been set but were defined out */ |
| 769 | #if !defined(PNG_WRITE_INVERT_SUPPORTED) && defined(PNG_READ_INVERT_SUPPORTED) |
| 770 | if (png_ptr->transformations & PNG_INVERT_MONO) |
| 771 | png_warning(png_ptr, "PNG_WRITE_INVERT_SUPPORTED is not defined."); |
| 772 | #endif |
| 773 | #if !defined(PNG_WRITE_FILLER_SUPPORTED) && defined(PNG_READ_FILLER_SUPPORTED) |
| 774 | if (png_ptr->transformations & PNG_FILLER) |
| 775 | png_warning(png_ptr, "PNG_WRITE_FILLER_SUPPORTED is not defined."); |
| 776 | #endif |
| 777 | #if !defined(PNG_WRITE_PACKSWAP_SUPPORTED) && defined(PNG_READ_PACKSWAP_SUPPORTED) |
| 778 | if (png_ptr->transformations & PNG_PACKSWAP) |
| 779 | png_warning(png_ptr, "PNG_WRITE_PACKSWAP_SUPPORTED is not defined."); |
| 780 | #endif |
| 781 | #if !defined(PNG_WRITE_PACK_SUPPORTED) && defined(PNG_READ_PACK_SUPPORTED) |
| 782 | if (png_ptr->transformations & PNG_PACK) |
| 783 | png_warning(png_ptr, "PNG_WRITE_PACK_SUPPORTED is not defined."); |
| 784 | #endif |
| 785 | #if !defined(PNG_WRITE_SHIFT_SUPPORTED) && defined(PNG_READ_SHIFT_SUPPORTED) |
| 786 | if (png_ptr->transformations & PNG_SHIFT) |
| 787 | png_warning(png_ptr, "PNG_WRITE_SHIFT_SUPPORTED is not defined."); |
| 788 | #endif |
| 789 | #if !defined(PNG_WRITE_BGR_SUPPORTED) && defined(PNG_READ_BGR_SUPPORTED) |
| 790 | if (png_ptr->transformations & PNG_BGR) |
| 791 | png_warning(png_ptr, "PNG_WRITE_BGR_SUPPORTED is not defined."); |
| 792 | #endif |
| 793 | #if !defined(PNG_WRITE_SWAP_SUPPORTED) && defined(PNG_READ_SWAP_SUPPORTED) |
| 794 | if (png_ptr->transformations & PNG_SWAP_BYTES) |
| 795 | png_warning(png_ptr, "PNG_WRITE_SWAP_SUPPORTED is not defined."); |
| 796 | #endif |
| 797 | |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 798 | png_write_start_row(png_ptr); |
| 799 | } |
| 800 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 801 | #if defined(PNG_WRITE_INTERLACING_SUPPORTED) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 802 | /* if interlaced and not interested in row, return */ |
| 803 | if (png_ptr->interlaced && (png_ptr->transformations & PNG_INTERLACE)) |
| 804 | { |
| 805 | switch (png_ptr->pass) |
| 806 | { |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 807 | case 0: |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 808 | if (png_ptr->row_number & 0x07) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 809 | { |
| 810 | png_write_finish_row(png_ptr); |
| 811 | return; |
| 812 | } |
| 813 | break; |
| 814 | case 1: |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 815 | if ((png_ptr->row_number & 0x07) || png_ptr->width < 5) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 816 | { |
| 817 | png_write_finish_row(png_ptr); |
| 818 | return; |
| 819 | } |
| 820 | break; |
| 821 | case 2: |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 822 | if ((png_ptr->row_number & 0x07) != 4) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 823 | { |
| 824 | png_write_finish_row(png_ptr); |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 825 | return; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 826 | } |
| 827 | break; |
| 828 | case 3: |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 829 | if ((png_ptr->row_number & 0x03) || png_ptr->width < 3) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 830 | { |
| 831 | png_write_finish_row(png_ptr); |
| 832 | return; |
| 833 | } |
| 834 | break; |
| 835 | case 4: |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 836 | if ((png_ptr->row_number & 0x03) != 2) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 837 | { |
| 838 | png_write_finish_row(png_ptr); |
| 839 | return; |
| 840 | } |
| 841 | break; |
| 842 | case 5: |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 843 | if ((png_ptr->row_number & 0x01) || png_ptr->width < 2) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 844 | { |
| 845 | png_write_finish_row(png_ptr); |
| 846 | return; |
| 847 | } |
| 848 | break; |
| 849 | case 6: |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 850 | if (!(png_ptr->row_number & 0x01)) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 851 | { |
| 852 | png_write_finish_row(png_ptr); |
| 853 | return; |
| 854 | } |
| 855 | break; |
| 856 | } |
| 857 | } |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 858 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 859 | |
| 860 | /* set up row info for transformations */ |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 861 | png_ptr->row_info.color_type = png_ptr->color_type; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 862 | png_ptr->row_info.width = png_ptr->usr_width; |
| 863 | png_ptr->row_info.channels = png_ptr->usr_channels; |
| 864 | png_ptr->row_info.bit_depth = png_ptr->usr_bit_depth; |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 865 | png_ptr->row_info.pixel_depth = (png_byte)(png_ptr->row_info.bit_depth * |
| 866 | png_ptr->row_info.channels); |
Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 867 | |
Glenn Randers-Pehrson | 272489d | 2004-08-04 06:34:52 -0500 | [diff] [blame] | 868 | png_ptr->row_info.rowbytes = PNG_ROWBYTES(png_ptr->row_info.pixel_depth, |
| 869 | png_ptr->row_info.width); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 870 | |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 871 | png_debug1(3, "row_info->color_type = %d\n", png_ptr->row_info.color_type); |
Glenn Randers-Pehrson | 4766a24 | 2000-07-17 06:17:09 -0500 | [diff] [blame] | 872 | png_debug1(3, "row_info->width = %lu\n", png_ptr->row_info.width); |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 873 | png_debug1(3, "row_info->channels = %d\n", png_ptr->row_info.channels); |
| 874 | png_debug1(3, "row_info->bit_depth = %d\n", png_ptr->row_info.bit_depth); |
| 875 | png_debug1(3, "row_info->pixel_depth = %d\n", png_ptr->row_info.pixel_depth); |
Glenn Randers-Pehrson | 4766a24 | 2000-07-17 06:17:09 -0500 | [diff] [blame] | 876 | png_debug1(3, "row_info->rowbytes = %lu\n", png_ptr->row_info.rowbytes); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 877 | |
| 878 | /* Copy user's row into buffer, leaving room for filter byte. */ |
Glenn Randers-Pehrson | a357b99 | 1998-02-08 20:56:40 -0600 | [diff] [blame] | 879 | png_memcpy_check(png_ptr, png_ptr->row_buf + 1, row, |
Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 880 | png_ptr->row_info.rowbytes); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 881 | |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 882 | #if defined(PNG_WRITE_INTERLACING_SUPPORTED) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 883 | /* handle interlacing */ |
| 884 | if (png_ptr->interlaced && png_ptr->pass < 6 && |
| 885 | (png_ptr->transformations & PNG_INTERLACE)) |
| 886 | { |
| 887 | png_do_write_interlace(&(png_ptr->row_info), |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 888 | png_ptr->row_buf + 1, png_ptr->pass); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 889 | /* this should always get caught above, but still ... */ |
| 890 | if (!(png_ptr->row_info.width)) |
| 891 | { |
| 892 | png_write_finish_row(png_ptr); |
| 893 | return; |
| 894 | } |
| 895 | } |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 896 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 897 | |
| 898 | /* handle other transformations */ |
| 899 | if (png_ptr->transformations) |
| 900 | png_do_write_transformations(png_ptr); |
| 901 | |
Glenn Randers-Pehrson | 2ad31ae | 2000-12-15 08:54:42 -0600 | [diff] [blame] | 902 | #if defined(PNG_MNG_FEATURES_SUPPORTED) |
Glenn Randers-Pehrson | 408b421 | 2000-12-18 09:33:57 -0600 | [diff] [blame] | 903 | /* Write filter_method 64 (intrapixel differencing) only if |
| 904 | * 1. Libpng was compiled with PNG_MNG_FEATURES_SUPPORTED and |
| 905 | * 2. Libpng did not write a PNG signature (this filter_method is only |
| 906 | * used in PNG datastreams that are embedded in MNG datastreams) and |
| 907 | * 3. The application called png_permit_mng_features with a mask that |
| 908 | * included PNG_FLAG_MNG_FILTER_64 and |
| 909 | * 4. The filter_method is 64 and |
| 910 | * 5. The color_type is RGB or RGBA |
| 911 | */ |
Glenn Randers-Pehrson | 2ad31ae | 2000-12-15 08:54:42 -0600 | [diff] [blame] | 912 | if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && |
| 913 | (png_ptr->filter_type == PNG_INTRAPIXEL_DIFFERENCING)) |
| 914 | { |
| 915 | /* Intrapixel differencing */ |
| 916 | png_do_write_intrapixel(&(png_ptr->row_info), png_ptr->row_buf + 1); |
| 917 | } |
| 918 | #endif |
| 919 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 920 | /* Find a filter if necessary, filter the row and write it out. */ |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 921 | png_write_find_filter(png_ptr, &(png_ptr->row_info)); |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 922 | |
| 923 | if (png_ptr->write_row_fn != NULL) |
| 924 | (*(png_ptr->write_row_fn))(png_ptr, png_ptr->row_number, png_ptr->pass); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 925 | } |
| 926 | |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 927 | #if defined(PNG_WRITE_FLUSH_SUPPORTED) |
| 928 | /* Set the automatic flush interval or 0 to turn flushing off */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 929 | void PNGAPI |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 930 | png_set_flush(png_structp png_ptr, int nrows) |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 931 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 932 | png_debug(1, "in png_set_flush\n"); |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 933 | if (png_ptr == NULL) |
| 934 | return; |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 935 | png_ptr->flush_dist = (nrows < 0 ? 0 : nrows); |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 936 | } |
| 937 | |
| 938 | /* flush the current output buffers now */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 939 | void PNGAPI |
Guy Schalnat | 4ee97b0 | 1996-01-16 01:51:56 -0600 | [diff] [blame] | 940 | png_write_flush(png_structp png_ptr) |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 941 | { |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 942 | int wrote_IDAT; |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 943 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 944 | png_debug(1, "in png_write_flush\n"); |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 945 | if (png_ptr == NULL) |
| 946 | return; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 947 | /* We have already written out all of the data */ |
| 948 | if (png_ptr->row_number >= png_ptr->num_rows) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 949 | return; |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 950 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 951 | do |
| 952 | { |
| 953 | int ret; |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 954 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 955 | /* compress the data */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 956 | ret = deflate(&png_ptr->zstream, Z_SYNC_FLUSH); |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 957 | wrote_IDAT = 0; |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 958 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 959 | /* check for compression errors */ |
| 960 | if (ret != Z_OK) |
| 961 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 962 | if (png_ptr->zstream.msg != NULL) |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 963 | png_error(png_ptr, png_ptr->zstream.msg); |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 964 | else |
| 965 | png_error(png_ptr, "zlib error"); |
| 966 | } |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 967 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 968 | if (!(png_ptr->zstream.avail_out)) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 969 | { |
| 970 | /* write the IDAT and reset the zlib output buffer */ |
| 971 | png_write_IDAT(png_ptr, png_ptr->zbuf, |
| 972 | png_ptr->zbuf_size); |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 973 | png_ptr->zstream.next_out = png_ptr->zbuf; |
| 974 | png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 975 | wrote_IDAT = 1; |
| 976 | } |
| 977 | } while(wrote_IDAT == 1); |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 978 | |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 979 | /* If there is any data left to be output, write it into a new IDAT */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 980 | if (png_ptr->zbuf_size != png_ptr->zstream.avail_out) |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 981 | { |
| 982 | /* write the IDAT and reset the zlib output buffer */ |
| 983 | png_write_IDAT(png_ptr, png_ptr->zbuf, |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 984 | png_ptr->zbuf_size - png_ptr->zstream.avail_out); |
| 985 | png_ptr->zstream.next_out = png_ptr->zbuf; |
| 986 | png_ptr->zstream.avail_out = (uInt)png_ptr->zbuf_size; |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 987 | } |
| 988 | png_ptr->flush_rows = 0; |
| 989 | png_flush(png_ptr); |
Guy Schalnat | 0f71645 | 1995-11-28 11:22:13 -0600 | [diff] [blame] | 990 | } |
| 991 | #endif /* PNG_WRITE_FLUSH_SUPPORTED */ |
| 992 | |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 993 | /* free all memory used by the write */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 994 | void PNGAPI |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 995 | png_destroy_write_struct(png_structpp png_ptr_ptr, png_infopp info_ptr_ptr) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 996 | { |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 997 | png_structp png_ptr = NULL; |
| 998 | png_infop info_ptr = NULL; |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 999 | #ifdef PNG_USER_MEM_SUPPORTED |
| 1000 | png_free_ptr free_fn = NULL; |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 1001 | png_voidp mem_ptr = NULL; |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1002 | #endif |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1003 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1004 | png_debug(1, "in png_destroy_write_struct\n"); |
| 1005 | if (png_ptr_ptr != NULL) |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1006 | { |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1007 | png_ptr = *png_ptr_ptr; |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1008 | #ifdef PNG_USER_MEM_SUPPORTED |
| 1009 | free_fn = png_ptr->free_fn; |
Glenn Randers-Pehrson | fcbd787 | 2002-04-07 16:35:38 -0500 | [diff] [blame] | 1010 | mem_ptr = png_ptr->mem_ptr; |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1011 | #endif |
| 1012 | } |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1013 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1014 | if (info_ptr_ptr != NULL) |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1015 | info_ptr = *info_ptr_ptr; |
| 1016 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1017 | if (info_ptr != NULL) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1018 | { |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1019 | png_free_data(png_ptr, info_ptr, PNG_FREE_ALL, -1); |
| 1020 | |
Glenn Randers-Pehrson | 6942d53 | 2000-05-01 09:31:54 -0500 | [diff] [blame] | 1021 | #if defined(PNG_UNKNOWN_CHUNKS_SUPPORTED) |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1022 | if (png_ptr->num_chunk_list) |
| 1023 | { |
| 1024 | png_free(png_ptr, png_ptr->chunk_list); |
Glenn Randers-Pehrson | 4766a24 | 2000-07-17 06:17:09 -0500 | [diff] [blame] | 1025 | png_ptr->chunk_list=NULL; |
Glenn Randers-Pehrson | a77ef62 | 2000-02-18 13:48:52 -0600 | [diff] [blame] | 1026 | png_ptr->num_chunk_list=0; |
| 1027 | } |
Glenn Randers-Pehrson | 6942d53 | 2000-05-01 09:31:54 -0500 | [diff] [blame] | 1028 | #endif |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1029 | |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1030 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 1031 | png_destroy_struct_2((png_voidp)info_ptr, (png_free_ptr)free_fn, |
| 1032 | (png_voidp)mem_ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1033 | #else |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1034 | png_destroy_struct((png_voidp)info_ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1035 | #endif |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 1036 | *info_ptr_ptr = NULL; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1037 | } |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1038 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1039 | if (png_ptr != NULL) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1040 | { |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1041 | png_write_destroy(png_ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1042 | #ifdef PNG_USER_MEM_SUPPORTED |
Glenn Randers-Pehrson | 8b6a889 | 2001-05-18 04:54:50 -0500 | [diff] [blame] | 1043 | png_destroy_struct_2((png_voidp)png_ptr, (png_free_ptr)free_fn, |
| 1044 | (png_voidp)mem_ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1045 | #else |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1046 | png_destroy_struct((png_voidp)png_ptr); |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1047 | #endif |
Glenn Randers-Pehrson | 3f54925 | 2001-10-27 07:35:13 -0500 | [diff] [blame] | 1048 | *png_ptr_ptr = NULL; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1049 | } |
| 1050 | } |
| 1051 | |
| 1052 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1053 | /* Free any memory used in png_ptr struct (old method) */ |
Glenn Randers-Pehrson | f64a06f | 2001-04-11 07:38:00 -0500 | [diff] [blame] | 1054 | void /* PRIVATE */ |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1055 | png_write_destroy(png_structp png_ptr) |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1056 | { |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1057 | #ifdef PNG_SETJMP_SUPPORTED |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 1058 | jmp_buf tmp_jmp; /* save jump buffer */ |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1059 | #endif |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1060 | png_error_ptr error_fn; |
| 1061 | png_error_ptr warning_fn; |
| 1062 | png_voidp error_ptr; |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1063 | #ifdef PNG_USER_MEM_SUPPORTED |
| 1064 | png_free_ptr free_fn; |
| 1065 | #endif |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1066 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1067 | png_debug(1, "in png_write_destroy\n"); |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1068 | /* free any memory zlib uses */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1069 | deflateEnd(&png_ptr->zstream); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1070 | |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1071 | /* free our memory. png_free checks NULL for us. */ |
Andreas Dilger | 02ad0ef | 1997-01-17 01:34:35 -0600 | [diff] [blame] | 1072 | png_free(png_ptr, png_ptr->zbuf); |
| 1073 | png_free(png_ptr, png_ptr->row_buf); |
| 1074 | png_free(png_ptr, png_ptr->prev_row); |
| 1075 | png_free(png_ptr, png_ptr->sub_row); |
| 1076 | png_free(png_ptr, png_ptr->up_row); |
| 1077 | png_free(png_ptr, png_ptr->avg_row); |
| 1078 | png_free(png_ptr, png_ptr->paeth_row); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1079 | |
Glenn Randers-Pehrson | c4a2ae6 | 1998-01-16 22:06:18 -0600 | [diff] [blame] | 1080 | #if defined(PNG_TIME_RFC1123_SUPPORTED) |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 1081 | png_free(png_ptr, png_ptr->time_buffer); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1082 | #endif |
| 1083 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1084 | #if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) |
| 1085 | png_free(png_ptr, png_ptr->prev_filters); |
| 1086 | png_free(png_ptr, png_ptr->filter_weights); |
| 1087 | png_free(png_ptr, png_ptr->inv_filter_weights); |
| 1088 | png_free(png_ptr, png_ptr->filter_costs); |
| 1089 | png_free(png_ptr, png_ptr->inv_filter_costs); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1090 | #endif |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1091 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1092 | #ifdef PNG_SETJMP_SUPPORTED |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1093 | /* reset structure */ |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1094 | png_memcpy(tmp_jmp, png_ptr->jmpbuf, png_sizeof (jmp_buf)); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1095 | #endif |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1096 | |
| 1097 | error_fn = png_ptr->error_fn; |
| 1098 | warning_fn = png_ptr->warning_fn; |
| 1099 | error_ptr = png_ptr->error_ptr; |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1100 | #ifdef PNG_USER_MEM_SUPPORTED |
| 1101 | free_fn = png_ptr->free_fn; |
| 1102 | #endif |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1103 | |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1104 | png_memset(png_ptr, 0, png_sizeof (png_struct)); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1105 | |
| 1106 | png_ptr->error_fn = error_fn; |
| 1107 | png_ptr->warning_fn = warning_fn; |
| 1108 | png_ptr->error_ptr = error_ptr; |
Glenn Randers-Pehrson | f7d1a17 | 1998-06-06 15:31:35 -0500 | [diff] [blame] | 1109 | #ifdef PNG_USER_MEM_SUPPORTED |
| 1110 | png_ptr->free_fn = free_fn; |
| 1111 | #endif |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1112 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1113 | #ifdef PNG_SETJMP_SUPPORTED |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1114 | png_memcpy(png_ptr->jmpbuf, tmp_jmp, png_sizeof (jmp_buf)); |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1115 | #endif |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1116 | } |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1117 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1118 | /* Allow the application to select one or more row filters to use. */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1119 | void PNGAPI |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1120 | png_set_filter(png_structp png_ptr, int method, int filters) |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1121 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1122 | png_debug(1, "in png_set_filter\n"); |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 1123 | if (png_ptr == NULL) |
| 1124 | return; |
Glenn Randers-Pehrson | 408b421 | 2000-12-18 09:33:57 -0600 | [diff] [blame] | 1125 | #if defined(PNG_MNG_FEATURES_SUPPORTED) |
Glenn Randers-Pehrson | f05f803 | 2000-12-23 14:27:39 -0600 | [diff] [blame] | 1126 | if((png_ptr->mng_features_permitted & PNG_FLAG_MNG_FILTER_64) && |
Glenn Randers-Pehrson | 408b421 | 2000-12-18 09:33:57 -0600 | [diff] [blame] | 1127 | (method == PNG_INTRAPIXEL_DIFFERENCING)) |
| 1128 | method = PNG_FILTER_TYPE_BASE; |
| 1129 | #endif |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1130 | if (method == PNG_FILTER_TYPE_BASE) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1131 | { |
| 1132 | switch (filters & (PNG_ALL_FILTERS | 0x07)) |
| 1133 | { |
| 1134 | case 5: |
| 1135 | case 6: |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1136 | case 7: png_warning(png_ptr, "Unknown row filter for method 0"); |
| 1137 | case PNG_FILTER_VALUE_NONE: png_ptr->do_filter=PNG_FILTER_NONE; break; |
| 1138 | case PNG_FILTER_VALUE_SUB: png_ptr->do_filter=PNG_FILTER_SUB; break; |
| 1139 | case PNG_FILTER_VALUE_UP: png_ptr->do_filter=PNG_FILTER_UP; break; |
| 1140 | case PNG_FILTER_VALUE_AVG: png_ptr->do_filter=PNG_FILTER_AVG; break; |
| 1141 | case PNG_FILTER_VALUE_PAETH: png_ptr->do_filter=PNG_FILTER_PAETH;break; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1142 | default: png_ptr->do_filter = (png_byte)filters; break; |
| 1143 | } |
| 1144 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1145 | /* If we have allocated the row_buf, this means we have already started |
| 1146 | * with the image and we should have allocated all of the filter buffers |
| 1147 | * that have been selected. If prev_row isn't already allocated, then |
| 1148 | * it is too late to start using the filters that need it, since we |
| 1149 | * will be missing the data in the previous row. If an application |
| 1150 | * wants to start and stop using particular filters during compression, |
| 1151 | * it should start out with all of the filters, and then add and |
| 1152 | * remove them after the start of compression. |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1153 | */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1154 | if (png_ptr->row_buf != NULL) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1155 | { |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1156 | if ((png_ptr->do_filter & PNG_FILTER_SUB) && png_ptr->sub_row == NULL) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1157 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1158 | png_ptr->sub_row = (png_bytep)png_malloc(png_ptr, |
Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 1159 | (png_ptr->rowbytes + 1)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1160 | png_ptr->sub_row[0] = PNG_FILTER_VALUE_SUB; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1161 | } |
| 1162 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1163 | if ((png_ptr->do_filter & PNG_FILTER_UP) && png_ptr->up_row == NULL) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1164 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1165 | if (png_ptr->prev_row == NULL) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1166 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1167 | png_warning(png_ptr, "Can't add Up filter after starting"); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1168 | png_ptr->do_filter &= ~PNG_FILTER_UP; |
| 1169 | } |
| 1170 | else |
| 1171 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1172 | png_ptr->up_row = (png_bytep)png_malloc(png_ptr, |
Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 1173 | (png_ptr->rowbytes + 1)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1174 | png_ptr->up_row[0] = PNG_FILTER_VALUE_UP; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1175 | } |
| 1176 | } |
| 1177 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1178 | if ((png_ptr->do_filter & PNG_FILTER_AVG) && png_ptr->avg_row == NULL) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1179 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1180 | if (png_ptr->prev_row == NULL) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1181 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1182 | png_warning(png_ptr, "Can't add Average filter after starting"); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1183 | png_ptr->do_filter &= ~PNG_FILTER_AVG; |
| 1184 | } |
| 1185 | else |
| 1186 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1187 | png_ptr->avg_row = (png_bytep)png_malloc(png_ptr, |
Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 1188 | (png_ptr->rowbytes + 1)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1189 | png_ptr->avg_row[0] = PNG_FILTER_VALUE_AVG; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1190 | } |
| 1191 | } |
| 1192 | |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1193 | if ((png_ptr->do_filter & PNG_FILTER_PAETH) && |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1194 | png_ptr->paeth_row == NULL) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1195 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1196 | if (png_ptr->prev_row == NULL) |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1197 | { |
| 1198 | png_warning(png_ptr, "Can't add Paeth filter after starting"); |
Glenn Randers-Pehrson | 860ab2b | 1999-10-14 07:43:10 -0500 | [diff] [blame] | 1199 | png_ptr->do_filter &= (png_byte)(~PNG_FILTER_PAETH); |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1200 | } |
| 1201 | else |
| 1202 | { |
Glenn Randers-Pehrson | 46f61e2 | 1998-01-30 21:45:12 -0600 | [diff] [blame] | 1203 | png_ptr->paeth_row = (png_bytep)png_malloc(png_ptr, |
Glenn Randers-Pehrson | 0f881d6 | 1998-02-07 10:20:57 -0600 | [diff] [blame] | 1204 | (png_ptr->rowbytes + 1)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1205 | png_ptr->paeth_row[0] = PNG_FILTER_VALUE_PAETH; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1206 | } |
| 1207 | } |
| 1208 | |
| 1209 | if (png_ptr->do_filter == PNG_NO_FILTERS) |
| 1210 | png_ptr->do_filter = PNG_FILTER_NONE; |
| 1211 | } |
| 1212 | } |
| 1213 | else |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1214 | png_error(png_ptr, "Unknown custom filter method"); |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1215 | } |
| 1216 | |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1217 | /* This allows us to influence the way in which libpng chooses the "best" |
| 1218 | * filter for the current scanline. While the "minimum-sum-of-absolute- |
| 1219 | * differences metric is relatively fast and effective, there is some |
| 1220 | * question as to whether it can be improved upon by trying to keep the |
| 1221 | * filtered data going to zlib more consistent, hopefully resulting in |
Glenn Randers-Pehrson | b6ce43d | 1998-01-01 07:13:13 -0600 | [diff] [blame] | 1222 | * better compression. |
| 1223 | */ |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1224 | #if defined(PNG_WRITE_WEIGHTED_FILTER_SUPPORTED) /* GRR 970116 */ |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1225 | void PNGAPI |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1226 | png_set_filter_heuristics(png_structp png_ptr, int heuristic_method, |
| 1227 | int num_weights, png_doublep filter_weights, |
| 1228 | png_doublep filter_costs) |
| 1229 | { |
| 1230 | int i; |
| 1231 | |
| 1232 | png_debug(1, "in png_set_filter_heuristics\n"); |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 1233 | if (png_ptr == NULL) |
| 1234 | return; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1235 | if (heuristic_method >= PNG_FILTER_HEURISTIC_LAST) |
| 1236 | { |
| 1237 | png_warning(png_ptr, "Unknown filter heuristic method"); |
| 1238 | return; |
| 1239 | } |
| 1240 | |
| 1241 | if (heuristic_method == PNG_FILTER_HEURISTIC_DEFAULT) |
| 1242 | { |
| 1243 | heuristic_method = PNG_FILTER_HEURISTIC_UNWEIGHTED; |
| 1244 | } |
| 1245 | |
| 1246 | if (num_weights < 0 || filter_weights == NULL || |
| 1247 | heuristic_method == PNG_FILTER_HEURISTIC_UNWEIGHTED) |
| 1248 | { |
| 1249 | num_weights = 0; |
| 1250 | } |
| 1251 | |
Glenn Randers-Pehrson | 860ab2b | 1999-10-14 07:43:10 -0500 | [diff] [blame] | 1252 | png_ptr->num_prev_filters = (png_byte)num_weights; |
| 1253 | png_ptr->heuristic_method = (png_byte)heuristic_method; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1254 | |
| 1255 | if (num_weights > 0) |
| 1256 | { |
| 1257 | if (png_ptr->prev_filters == NULL) |
| 1258 | { |
| 1259 | png_ptr->prev_filters = (png_bytep)png_malloc(png_ptr, |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1260 | (png_uint_32)(png_sizeof(png_byte) * num_weights)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1261 | |
Glenn Randers-Pehrson | 82ae383 | 2001-04-20 10:32:10 -0500 | [diff] [blame] | 1262 | /* To make sure that the weighting starts out fairly */ |
| 1263 | for (i = 0; i < num_weights; i++) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1264 | { |
Glenn Randers-Pehrson | 82ae383 | 2001-04-20 10:32:10 -0500 | [diff] [blame] | 1265 | png_ptr->prev_filters[i] = 255; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1266 | } |
| 1267 | } |
| 1268 | |
| 1269 | if (png_ptr->filter_weights == NULL) |
| 1270 | { |
Glenn Randers-Pehrson | 87c6bc9 | 2001-04-03 22:43:19 -0500 | [diff] [blame] | 1271 | png_ptr->filter_weights = (png_uint_16p)png_malloc(png_ptr, |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1272 | (png_uint_32)(png_sizeof(png_uint_16) * num_weights)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1273 | |
Glenn Randers-Pehrson | 87c6bc9 | 2001-04-03 22:43:19 -0500 | [diff] [blame] | 1274 | png_ptr->inv_filter_weights = (png_uint_16p)png_malloc(png_ptr, |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1275 | (png_uint_32)(png_sizeof(png_uint_16) * num_weights)); |
Glenn Randers-Pehrson | 82ae383 | 2001-04-20 10:32:10 -0500 | [diff] [blame] | 1276 | for (i = 0; i < num_weights; i++) |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1277 | { |
Glenn Randers-Pehrson | 82ae383 | 2001-04-20 10:32:10 -0500 | [diff] [blame] | 1278 | png_ptr->inv_filter_weights[i] = |
| 1279 | png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR; |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1280 | } |
| 1281 | } |
| 1282 | |
| 1283 | for (i = 0; i < num_weights; i++) |
| 1284 | { |
| 1285 | if (filter_weights[i] < 0.0) |
| 1286 | { |
| 1287 | png_ptr->inv_filter_weights[i] = |
| 1288 | png_ptr->filter_weights[i] = PNG_WEIGHT_FACTOR; |
| 1289 | } |
| 1290 | else |
| 1291 | { |
| 1292 | png_ptr->inv_filter_weights[i] = |
| 1293 | (png_uint_16)((double)PNG_WEIGHT_FACTOR*filter_weights[i]+0.5); |
| 1294 | png_ptr->filter_weights[i] = |
| 1295 | (png_uint_16)((double)PNG_WEIGHT_FACTOR/filter_weights[i]+0.5); |
| 1296 | } |
| 1297 | } |
| 1298 | } |
| 1299 | |
| 1300 | /* If, in the future, there are other filter methods, this would |
| 1301 | * need to be based on png_ptr->filter. |
| 1302 | */ |
| 1303 | if (png_ptr->filter_costs == NULL) |
| 1304 | { |
Glenn Randers-Pehrson | 87c6bc9 | 2001-04-03 22:43:19 -0500 | [diff] [blame] | 1305 | png_ptr->filter_costs = (png_uint_16p)png_malloc(png_ptr, |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1306 | (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1307 | |
Glenn Randers-Pehrson | 87c6bc9 | 2001-04-03 22:43:19 -0500 | [diff] [blame] | 1308 | png_ptr->inv_filter_costs = (png_uint_16p)png_malloc(png_ptr, |
Glenn Randers-Pehrson | 5fea36f | 2004-07-28 08:20:44 -0500 | [diff] [blame] | 1309 | (png_uint_32)(png_sizeof(png_uint_16) * PNG_FILTER_VALUE_LAST)); |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1310 | |
| 1311 | for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) |
| 1312 | { |
| 1313 | png_ptr->inv_filter_costs[i] = |
| 1314 | png_ptr->filter_costs[i] = PNG_COST_FACTOR; |
| 1315 | } |
| 1316 | } |
| 1317 | |
| 1318 | /* Here is where we set the relative costs of the different filters. We |
| 1319 | * should take the desired compression level into account when setting |
| 1320 | * the costs, so that Paeth, for instance, has a high relative cost at low |
| 1321 | * compression levels, while it has a lower relative cost at higher |
| 1322 | * compression settings. The filter types are in order of increasing |
| 1323 | * relative cost, so it would be possible to do this with an algorithm. |
| 1324 | */ |
| 1325 | for (i = 0; i < PNG_FILTER_VALUE_LAST; i++) |
| 1326 | { |
| 1327 | if (filter_costs == NULL || filter_costs[i] < 0.0) |
| 1328 | { |
| 1329 | png_ptr->inv_filter_costs[i] = |
| 1330 | png_ptr->filter_costs[i] = PNG_COST_FACTOR; |
| 1331 | } |
| 1332 | else if (filter_costs[i] >= 1.0) |
| 1333 | { |
| 1334 | png_ptr->inv_filter_costs[i] = |
| 1335 | (png_uint_16)((double)PNG_COST_FACTOR / filter_costs[i] + 0.5); |
| 1336 | png_ptr->filter_costs[i] = |
| 1337 | (png_uint_16)((double)PNG_COST_FACTOR * filter_costs[i] + 0.5); |
| 1338 | } |
| 1339 | } |
| 1340 | } |
| 1341 | #endif /* PNG_WRITE_WEIGHTED_FILTER_SUPPORTED */ |
| 1342 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1343 | void PNGAPI |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1344 | png_set_compression_level(png_structp png_ptr, int level) |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1345 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1346 | png_debug(1, "in png_set_compression_level\n"); |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 1347 | if (png_ptr == NULL) |
| 1348 | return; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1349 | png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_LEVEL; |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1350 | png_ptr->zlib_level = level; |
| 1351 | } |
| 1352 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1353 | void PNGAPI |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1354 | png_set_compression_mem_level(png_structp png_ptr, int mem_level) |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1355 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1356 | png_debug(1, "in png_set_compression_mem_level\n"); |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 1357 | if (png_ptr == NULL) |
| 1358 | return; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1359 | png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_MEM_LEVEL; |
Guy Schalnat | b2e01bd | 1996-01-26 01:38:47 -0600 | [diff] [blame] | 1360 | png_ptr->zlib_mem_level = mem_level; |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1361 | } |
| 1362 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1363 | void PNGAPI |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1364 | png_set_compression_strategy(png_structp png_ptr, int strategy) |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1365 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1366 | png_debug(1, "in png_set_compression_strategy\n"); |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 1367 | if (png_ptr == NULL) |
| 1368 | return; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1369 | png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_STRATEGY; |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1370 | png_ptr->zlib_strategy = strategy; |
| 1371 | } |
| 1372 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1373 | void PNGAPI |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1374 | png_set_compression_window_bits(png_structp png_ptr, int window_bits) |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1375 | { |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 1376 | if (png_ptr == NULL) |
| 1377 | return; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1378 | if (window_bits > 15) |
| 1379 | png_warning(png_ptr, "Only compression windows <= 32k supported by PNG"); |
Glenn Randers-Pehrson | 4393a9a | 1999-09-17 12:27:26 -0500 | [diff] [blame] | 1380 | else if (window_bits < 8) |
| 1381 | png_warning(png_ptr, "Only compression windows >= 256 supported by PNG"); |
Glenn Randers-Pehrson | 166c5a3 | 1999-12-10 09:43:02 -0600 | [diff] [blame] | 1382 | #ifndef WBITS_8_OK |
| 1383 | /* avoid libpng bug with 256-byte windows */ |
| 1384 | if (window_bits == 8) |
| 1385 | { |
| 1386 | png_warning(png_ptr, "Compression window is being reset to 512"); |
| 1387 | window_bits=9; |
| 1388 | } |
| 1389 | #endif |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1390 | png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_WINDOW_BITS; |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1391 | png_ptr->zlib_window_bits = window_bits; |
| 1392 | } |
| 1393 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1394 | void PNGAPI |
Guy Schalnat | 6d76471 | 1995-12-19 03:22:19 -0600 | [diff] [blame] | 1395 | png_set_compression_method(png_structp png_ptr, int method) |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1396 | { |
Andreas Dilger | 47a0c42 | 1997-05-16 02:46:07 -0500 | [diff] [blame] | 1397 | png_debug(1, "in png_set_compression_method\n"); |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 1398 | if (png_ptr == NULL) |
| 1399 | return; |
Guy Schalnat | e5a3779 | 1996-06-05 15:50:50 -0500 | [diff] [blame] | 1400 | if (method != 8) |
| 1401 | png_warning(png_ptr, "Only compression method 8 is supported by PNG"); |
| 1402 | png_ptr->flags |= PNG_FLAG_ZLIB_CUSTOM_METHOD; |
Guy Schalnat | 51f0eb4 | 1995-09-26 05:22:39 -0500 | [diff] [blame] | 1403 | png_ptr->zlib_method = method; |
Guy Schalnat | 0d58058 | 1995-07-20 02:43:20 -0500 | [diff] [blame] | 1404 | } |
| 1405 | |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1406 | void PNGAPI |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 1407 | png_set_write_status_fn(png_structp png_ptr, png_write_status_ptr write_row_fn) |
| 1408 | { |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 1409 | if (png_ptr == NULL) |
| 1410 | return; |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 1411 | png_ptr->write_row_fn = write_row_fn; |
| 1412 | } |
| 1413 | |
| 1414 | #if defined(PNG_WRITE_USER_TRANSFORM_SUPPORTED) |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1415 | void PNGAPI |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 1416 | png_set_write_user_transform_fn(png_structp png_ptr, png_user_transform_ptr |
| 1417 | write_user_transform_fn) |
| 1418 | { |
| 1419 | png_debug(1, "in png_set_write_user_transform_fn\n"); |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 1420 | if (png_ptr == NULL) |
| 1421 | return; |
Glenn Randers-Pehrson | 08a3343 | 1998-03-07 06:06:55 -0600 | [diff] [blame] | 1422 | png_ptr->transformations |= PNG_USER_TRANSFORM; |
| 1423 | png_ptr->write_user_transform_fn = write_user_transform_fn; |
| 1424 | } |
| 1425 | #endif |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1426 | |
| 1427 | |
| 1428 | #if defined(PNG_INFO_IMAGE_SUPPORTED) |
Glenn Randers-Pehrson | 7529457 | 2000-05-06 14:09:57 -0500 | [diff] [blame] | 1429 | void PNGAPI |
| 1430 | png_write_png(png_structp png_ptr, png_infop info_ptr, |
Glenn Randers-Pehrson | 1ef65b6 | 2000-05-12 06:19:53 -0500 | [diff] [blame] | 1431 | int transforms, voidp params) |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1432 | { |
Glenn Randers-Pehrson | 170b70c | 2006-03-10 10:19:04 -0600 | [diff] [blame^] | 1433 | if (png_ptr == NULL || info_ptr == NULL) |
| 1434 | return; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1435 | #if defined(PNG_WRITE_INVERT_ALPHA_SUPPORTED) |
| 1436 | /* invert the alpha channel from opacity to transparency */ |
| 1437 | if (transforms & PNG_TRANSFORM_INVERT_ALPHA) |
| 1438 | png_set_invert_alpha(png_ptr); |
| 1439 | #endif |
| 1440 | |
| 1441 | /* Write the file header information. */ |
| 1442 | png_write_info(png_ptr, info_ptr); |
| 1443 | |
| 1444 | /* ------ these transformations don't touch the info structure ------- */ |
| 1445 | |
| 1446 | #if defined(PNG_WRITE_INVERT_SUPPORTED) |
| 1447 | /* invert monochrome pixels */ |
| 1448 | if (transforms & PNG_TRANSFORM_INVERT_MONO) |
| 1449 | png_set_invert_mono(png_ptr); |
| 1450 | #endif |
| 1451 | |
| 1452 | #if defined(PNG_WRITE_SHIFT_SUPPORTED) |
| 1453 | /* Shift the pixels up to a legal bit depth and fill in |
| 1454 | * as appropriate to correctly scale the image. |
| 1455 | */ |
| 1456 | if ((transforms & PNG_TRANSFORM_SHIFT) |
| 1457 | && (info_ptr->valid & PNG_INFO_sBIT)) |
| 1458 | png_set_shift(png_ptr, &info_ptr->sig_bit); |
| 1459 | #endif |
| 1460 | |
| 1461 | #if defined(PNG_WRITE_PACK_SUPPORTED) |
| 1462 | /* pack pixels into bytes */ |
| 1463 | if (transforms & PNG_TRANSFORM_PACKING) |
| 1464 | png_set_packing(png_ptr); |
| 1465 | #endif |
| 1466 | |
| 1467 | #if defined(PNG_WRITE_SWAP_ALPHA_SUPPORTED) |
| 1468 | /* swap location of alpha bytes from ARGB to RGBA */ |
| 1469 | if (transforms & PNG_TRANSFORM_SWAP_ALPHA) |
| 1470 | png_set_swap_alpha(png_ptr); |
| 1471 | #endif |
| 1472 | |
| 1473 | #if defined(PNG_WRITE_FILLER_SUPPORTED) |
| 1474 | /* Get rid of filler (OR ALPHA) bytes, pack XRGB/RGBX/ARGB/RGBA into |
| 1475 | * RGB (4 channels -> 3 channels). The second parameter is not used. |
| 1476 | */ |
| 1477 | if (transforms & PNG_TRANSFORM_STRIP_FILLER) |
| 1478 | png_set_filler(png_ptr, 0, PNG_FILLER_BEFORE); |
| 1479 | #endif |
| 1480 | |
| 1481 | #if defined(PNG_WRITE_BGR_SUPPORTED) |
| 1482 | /* flip BGR pixels to RGB */ |
| 1483 | if (transforms & PNG_TRANSFORM_BGR) |
| 1484 | png_set_bgr(png_ptr); |
| 1485 | #endif |
| 1486 | |
| 1487 | #if defined(PNG_WRITE_SWAP_SUPPORTED) |
| 1488 | /* swap bytes of 16-bit files to most significant byte first */ |
| 1489 | if (transforms & PNG_TRANSFORM_SWAP_ENDIAN) |
| 1490 | png_set_swap(png_ptr); |
| 1491 | #endif |
| 1492 | |
| 1493 | #if defined(PNG_WRITE_PACKSWAP_SUPPORTED) |
| 1494 | /* swap bits of 1, 2, 4 bit packed pixel formats */ |
| 1495 | if (transforms & PNG_TRANSFORM_PACKSWAP) |
| 1496 | png_set_packswap(png_ptr); |
| 1497 | #endif |
| 1498 | |
| 1499 | /* ----------------------- end of transformations ------------------- */ |
| 1500 | |
| 1501 | /* write the bits */ |
| 1502 | if (info_ptr->valid & PNG_INFO_IDAT) |
| 1503 | png_write_image(png_ptr, info_ptr->row_pointers); |
| 1504 | |
| 1505 | /* It is REQUIRED to call this to finish writing the rest of the file */ |
| 1506 | png_write_end(png_ptr, info_ptr); |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 1507 | |
Glenn Randers-Pehrson | 82ae383 | 2001-04-20 10:32:10 -0500 | [diff] [blame] | 1508 | if(transforms == 0 || params == NULL) |
Glenn Randers-Pehrson | 520a764 | 2000-03-21 05:13:06 -0600 | [diff] [blame] | 1509 | /* quiet compiler warnings */ return; |
Glenn Randers-Pehrson | 61c32d9 | 2000-02-04 23:40:16 -0600 | [diff] [blame] | 1510 | } |
| 1511 | #endif |
Glenn Randers-Pehrson | 1909560 | 2001-03-14 07:08:39 -0600 | [diff] [blame] | 1512 | #endif /* PNG_WRITE_SUPPORTED */ |