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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 5131 | clevermous | 1 | /* |
| 2 | IMGLIB: An example image loading library for use with SDL |
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| 3 | Copyright (C) 1999 Sam Lantinga |
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| 4 | |||
| 5 | This library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Library General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2 of the License, or (at your option) any later version. |
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| 9 | |||
| 10 | This library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Library General Public License for more details. |
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| 14 | |||
| 15 | You should have received a copy of the GNU Library General Public |
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| 16 | License along with this library; if not, write to the Free |
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| 17 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 18 | |||
| 19 | Sam Lantinga |
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| 20 | 5635-34 Springhouse Dr. |
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| 21 | Pleasanton, CA 94588 (USA) |
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| 22 | slouken@devolution.com |
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| 23 | |||
| 24 | XCF support by Bernhard J. Pietsch |
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| 25 | */ |
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| 26 | |||
| 27 | /* This is a XCF image file loading framework */ |
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| 28 | |||
| 29 | #include |
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| 30 | #include |
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| 31 | #include |
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| 32 | |||
| 33 | #include "SDL_image.h" |
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| 34 | |||
| 35 | #ifdef LOAD_XCF |
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| 36 | |||
| 37 | static char prop_names [][30] = { |
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| 38 | "end", |
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| 39 | "colormap", |
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| 40 | "active_layer", |
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| 41 | "active_channel", |
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| 42 | "selection", |
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| 43 | "floating_selection", |
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| 44 | "opacity", |
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| 45 | "mode", |
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| 46 | "visible", |
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| 47 | "linked", |
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| 48 | "preserve_transparency", |
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| 49 | "apply_mask", |
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| 50 | "edit_mask", |
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| 51 | "show_mask", |
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| 52 | "show_masked", |
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| 53 | "offsets", |
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| 54 | "color", |
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| 55 | "compression", |
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| 56 | "guides", |
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| 57 | "resolution", |
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| 58 | "tattoo", |
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| 59 | "parasites", |
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| 60 | "unit", |
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| 61 | "paths", |
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| 62 | "user_unit" |
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| 63 | }; |
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| 64 | |||
| 65 | typedef enum |
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| 66 | { |
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| 67 | PROP_END = 0, |
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| 68 | PROP_COLORMAP = 1, |
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| 69 | PROP_ACTIVE_LAYER = 2, |
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| 70 | PROP_ACTIVE_CHANNEL = 3, |
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| 71 | PROP_SELECTION = 4, |
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| 72 | PROP_FLOATING_SELECTION = 5, |
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| 73 | PROP_OPACITY = 6, |
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| 74 | PROP_MODE = 7, |
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| 75 | PROP_VISIBLE = 8, |
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| 76 | PROP_LINKED = 9, |
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| 77 | PROP_PRESERVE_TRANSPARENCY = 10, |
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| 78 | PROP_APPLY_MASK = 11, |
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| 79 | PROP_EDIT_MASK = 12, |
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| 80 | PROP_SHOW_MASK = 13, |
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| 81 | PROP_SHOW_MASKED = 14, |
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| 82 | PROP_OFFSETS = 15, |
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| 83 | PROP_COLOR = 16, |
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| 84 | PROP_COMPRESSION = 17, |
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| 85 | PROP_GUIDES = 18, |
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| 86 | PROP_RESOLUTION = 19, |
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| 87 | PROP_TATTOO = 20, |
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| 88 | PROP_PARASITES = 21, |
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| 89 | PROP_UNIT = 22, |
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| 90 | PROP_PATHS = 23, |
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| 91 | PROP_USER_UNIT = 24 |
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| 92 | } xcf_prop_type; |
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| 93 | |||
| 94 | typedef enum { |
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| 95 | COMPR_NONE = 0, |
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| 96 | COMPR_RLE = 1, |
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| 97 | COMPR_ZLIB = 2, |
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| 98 | COMPR_FRACTAL = 3 |
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| 99 | } xcf_compr_type; |
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| 100 | |||
| 101 | typedef enum { |
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| 102 | IMAGE_RGB = 0, |
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| 103 | IMAGE_GREYSCALE = 1, |
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| 104 | IMAGE_INDEXED = 2 |
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| 105 | } xcf_image_type; |
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| 106 | |||
| 107 | typedef struct { |
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| 108 | Uint32 id; |
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| 109 | Uint32 length; |
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| 110 | union { |
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| 111 | struct { |
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| 112 | Uint32 num; |
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| 113 | char * cmap; |
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| 114 | } colormap; // 1 |
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| 115 | struct { |
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| 116 | Uint32 drawable_offset; |
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| 117 | } floating_selection; // 5 |
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| 118 | Sint32 opacity; |
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| 119 | Sint32 mode; |
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| 120 | int visible; |
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| 121 | int linked; |
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| 122 | int preserve_transparency; |
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| 123 | int apply_mask; |
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| 124 | int show_mask; |
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| 125 | struct { |
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| 126 | Sint32 x; |
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| 127 | Sint32 y; |
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| 128 | } offset; |
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| 129 | unsigned char color [3]; |
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| 130 | Uint8 compression; |
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| 131 | struct { |
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| 132 | Sint32 x; |
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| 133 | Sint32 y; |
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| 134 | } resolution; |
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| 135 | struct { |
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| 136 | char * name; |
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| 137 | Uint32 flags; |
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| 138 | Uint32 size; |
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| 139 | char * data; |
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| 140 | } parasite; |
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| 141 | } data; |
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| 142 | } xcf_prop; |
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| 143 | |||
| 144 | typedef struct { |
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| 145 | char sign [14]; |
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| 146 | Uint32 width; |
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| 147 | Uint32 height; |
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| 148 | Sint32 image_type; |
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| 149 | xcf_prop * properties; |
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| 150 | |||
| 151 | Uint32 * layer_file_offsets; |
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| 152 | Uint32 * channel_file_offsets; |
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| 153 | |||
| 154 | xcf_compr_type compr; |
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| 155 | Uint32 cm_num; |
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| 156 | unsigned char * cm_map; |
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| 157 | } xcf_header; |
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| 158 | |||
| 159 | typedef struct { |
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| 160 | Uint32 width; |
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| 161 | Uint32 height; |
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| 162 | Sint32 layer_type; |
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| 163 | char * name; |
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| 164 | xcf_prop * properties; |
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| 165 | |||
| 166 | Uint32 hierarchy_file_offset; |
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| 167 | Uint32 layer_mask_offset; |
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| 168 | |||
| 169 | Uint32 offset_x; |
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| 170 | Uint32 offset_y; |
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| 171 | } xcf_layer; |
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| 172 | |||
| 173 | typedef struct { |
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| 174 | Uint32 width; |
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| 175 | Uint32 height; |
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| 176 | char * name; |
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| 177 | xcf_prop * properties; |
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| 178 | |||
| 179 | Uint32 hierarchy_file_offset; |
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| 180 | |||
| 181 | Uint32 color; |
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| 182 | Uint32 opacity; |
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| 183 | int selection : 1; |
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| 184 | } xcf_channel; |
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| 185 | |||
| 186 | typedef struct { |
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| 187 | Uint32 width; |
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| 188 | Uint32 height; |
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| 189 | Uint32 bpp; |
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| 190 | |||
| 191 | Uint32 * level_file_offsets; |
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| 192 | } xcf_hierarchy; |
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| 193 | |||
| 194 | typedef struct { |
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| 195 | Uint32 width; |
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| 196 | Uint32 height; |
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| 197 | |||
| 198 | Uint32 * tile_file_offsets; |
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| 199 | } xcf_level; |
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| 200 | |||
| 201 | typedef unsigned char * xcf_tile; |
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| 202 | |||
| 203 | typedef unsigned char * (* load_tile_type) (SDL_RWops *, Uint32, int, int, int); |
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| 204 | |||
| 205 | |||
| 206 | /* See if an image is contained in a data source */ |
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| 207 | int IMG_isXCF(SDL_RWops *src) { |
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| 208 | int is_XCF; |
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| 209 | char magic[14]; |
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| 210 | |||
| 211 | is_XCF = 0; |
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| 212 | if ( SDL_RWread(src, magic, 14, 1) ) { |
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| 213 | if (strncmp(magic, "gimp xcf ", 9) == 0) { |
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| 214 | is_XCF = 1; |
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| 215 | } |
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| 216 | } |
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| 217 | |||
| 218 | return(is_XCF); |
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| 219 | } |
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| 220 | |||
| 221 | static char * read_string (SDL_RWops * src) { |
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| 222 | Uint32 tmp; |
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| 223 | char * data; |
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| 224 | |||
| 225 | tmp = SDL_ReadBE32 (src); |
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| 226 | if (tmp > 0) { |
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| 227 | data = (char *) malloc (sizeof (char) * tmp); |
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| 228 | SDL_RWread (src, data, tmp, 1); |
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| 229 | } |
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| 230 | else { |
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| 231 | data = NULL; |
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| 232 | } |
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| 233 | |||
| 234 | return data; |
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| 235 | } |
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| 236 | |||
| 237 | |||
| 238 | static Uint32 Swap32 (Uint32 v) { |
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| 239 | return |
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| 240 | ((v & 0x000000FF) << 16) |
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| 241 | | ((v & 0x0000FF00)) |
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| 242 | | ((v & 0x00FF0000) >> 16) |
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| 243 | | ((v & 0xFF000000)); |
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| 244 | } |
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| 245 | |||
| 246 | void xcf_read_property (SDL_RWops * src, xcf_prop * prop) { |
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| 247 | prop->id = SDL_ReadBE32 (src); |
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| 248 | prop->length = SDL_ReadBE32 (src); |
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| 249 | |||
| 250 | printf ("%.8X: %s: %d\n", SDL_RWtell (src), prop->id < 25 ? prop_names [prop->id] : "unknown", prop->length); |
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| 251 | |||
| 252 | switch (prop->id) { |
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| 253 | case PROP_COLORMAP: |
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| 254 | prop->data.colormap.num = SDL_ReadBE32 (src); |
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| 255 | prop->data.colormap.cmap = (char *) malloc (sizeof (char) * prop->data.colormap.num * 3); |
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| 256 | SDL_RWread (src, prop->data.colormap.cmap, prop->data.colormap.num*3, 1); |
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| 257 | break; |
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| 258 | |||
| 259 | case PROP_OFFSETS: |
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| 260 | prop->data.offset.x = SDL_ReadBE32 (src); |
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| 261 | prop->data.offset.y = SDL_ReadBE32 (src); |
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| 262 | break; |
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| 263 | case PROP_OPACITY: |
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| 264 | prop->data.opacity = SDL_ReadBE32 (src); |
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| 265 | break; |
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| 266 | case PROP_COMPRESSION: |
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| 267 | case PROP_COLOR: |
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| 268 | SDL_RWread (src, &prop->data, prop->length, 1); |
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| 269 | break; |
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| 270 | default: |
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| 271 | // SDL_RWread (src, &prop->data, prop->length, 1); |
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| 272 | SDL_RWseek (src, prop->length, SEEK_CUR); |
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| 273 | } |
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| 274 | } |
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| 275 | |||
| 276 | void free_xcf_header (xcf_header * h) { |
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| 277 | if (h->cm_num) |
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| 278 | free (h->cm_map); |
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| 279 | |||
| 280 | free (h); |
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| 281 | } |
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| 282 | |||
| 283 | xcf_header * read_xcf_header (SDL_RWops * src) { |
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| 284 | xcf_header * h; |
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| 285 | xcf_prop prop; |
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| 286 | |||
| 287 | h = (xcf_header *) malloc (sizeof (xcf_header)); |
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| 288 | SDL_RWread (src, h->sign, 14, 1); |
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| 289 | h->width = SDL_ReadBE32 (src); |
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| 290 | h->height = SDL_ReadBE32 (src); |
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| 291 | h->image_type = SDL_ReadBE32 (src); |
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| 292 | |||
| 293 | h->properties = NULL; |
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| 294 | h->compr = COMPR_NONE; |
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| 295 | h->cm_num = 0; |
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| 296 | h->cm_map = NULL; |
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| 297 | |||
| 298 | // Just read, don't save |
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| 299 | do { |
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| 300 | xcf_read_property (src, &prop); |
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| 301 | if (prop.id == PROP_COMPRESSION) |
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| 302 | h->compr = prop.data.compression; |
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| 303 | else if (prop.id == PROP_COLORMAP) { |
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| 304 | int i; |
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| 305 | |||
| 306 | h->cm_num = prop.data.colormap.num; |
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| 307 | h->cm_map = (char *) malloc (sizeof (char) * 3 * h->cm_num); |
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| 308 | memcpy (h->cm_map, prop.data.colormap.cmap, 3*sizeof (char)*h->cm_num); |
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| 309 | free (prop.data.colormap.cmap); |
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| 310 | } |
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| 311 | } while (prop.id != PROP_END); |
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| 312 | |||
| 313 | return h; |
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| 314 | } |
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| 315 | |||
| 316 | void free_xcf_layer (xcf_layer * l) { |
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| 317 | free (l->name); |
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| 318 | free (l); |
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| 319 | } |
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| 320 | |||
| 321 | xcf_layer * read_xcf_layer (SDL_RWops * src) { |
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| 322 | xcf_layer * l; |
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| 323 | xcf_prop prop; |
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| 324 | |||
| 325 | l = (xcf_layer *) malloc (sizeof (xcf_layer)); |
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| 326 | l->width = SDL_ReadBE32 (src); |
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| 327 | l->height = SDL_ReadBE32 (src); |
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| 328 | l->layer_type = SDL_ReadBE32 (src); |
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| 329 | |||
| 330 | l->name = read_string (src); |
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| 331 | |||
| 332 | do { |
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| 333 | xcf_read_property (src, &prop); |
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| 334 | if (prop.id == PROP_OFFSETS) { |
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| 335 | l->offset_x = prop.data.offset.x; |
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| 336 | l->offset_y = prop.data.offset.y; |
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| 337 | } |
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| 338 | } while (prop.id != PROP_END); |
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| 339 | |||
| 340 | l->hierarchy_file_offset = SDL_ReadBE32 (src); |
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| 341 | l->layer_mask_offset = SDL_ReadBE32 (src); |
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| 342 | |||
| 343 | return l; |
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| 344 | } |
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| 345 | |||
| 346 | void free_xcf_channel (xcf_channel * c) { |
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| 347 | free (c->name); |
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| 348 | free (c); |
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| 349 | } |
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| 350 | |||
| 351 | xcf_channel * read_xcf_channel (SDL_RWops * src) { |
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| 352 | xcf_channel * l; |
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| 353 | xcf_prop prop; |
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| 354 | |||
| 355 | l = (xcf_channel *) malloc (sizeof (xcf_channel)); |
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| 356 | l->width = SDL_ReadBE32 (src); |
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| 357 | l->height = SDL_ReadBE32 (src); |
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| 358 | |||
| 359 | l->name = read_string (src); |
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| 360 | |||
| 361 | l->selection = 0; |
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| 362 | do { |
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| 363 | xcf_read_property (src, &prop); |
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| 364 | switch (prop.id) { |
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| 365 | case PROP_OPACITY: |
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| 366 | l->opacity = prop.data.opacity << 24; |
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| 367 | break; |
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| 368 | case PROP_COLOR: |
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| 369 | l->color = ((Uint32) prop.data.color[0] << 16) |
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| 370 | | ((Uint32) prop.data.color[1] << 8) |
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| 371 | | ((Uint32) prop.data.color[2]); |
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| 372 | break; |
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| 373 | case PROP_SELECTION: |
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| 374 | l->selection = 1; |
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| 375 | break; |
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| 376 | default: |
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| 377 | } |
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| 378 | } while (prop.id != PROP_END); |
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| 379 | |||
| 380 | l->hierarchy_file_offset = SDL_ReadBE32 (src); |
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| 381 | |||
| 382 | return l; |
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| 383 | } |
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| 384 | |||
| 385 | void free_xcf_hierarchy (xcf_hierarchy * h) { |
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| 386 | free (h->level_file_offsets); |
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| 387 | free (h); |
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| 388 | } |
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| 389 | |||
| 390 | xcf_hierarchy * read_xcf_hierarchy (SDL_RWops * src) { |
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| 391 | xcf_hierarchy * h; |
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| 392 | int i; |
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| 393 | |||
| 394 | h = (xcf_hierarchy *) malloc (sizeof (xcf_hierarchy)); |
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| 395 | h->width = SDL_ReadBE32 (src); |
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| 396 | h->height = SDL_ReadBE32 (src); |
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| 397 | h->bpp = SDL_ReadBE32 (src); |
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| 398 | |||
| 399 | h->level_file_offsets = NULL; |
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| 400 | i = 0; |
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| 401 | do { |
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| 402 | h->level_file_offsets = (Uint32 *) realloc (h->level_file_offsets, sizeof (Uint32) * (i+1)); |
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| 403 | h->level_file_offsets [i] = SDL_ReadBE32 (src); |
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| 404 | } while (h->level_file_offsets [i++]); |
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| 405 | |||
| 406 | return h; |
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| 407 | } |
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| 408 | |||
| 409 | void free_xcf_level (xcf_level * l) { |
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| 410 | free (l->tile_file_offsets); |
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| 411 | free (l); |
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| 412 | } |
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| 413 | |||
| 414 | xcf_level * read_xcf_level (SDL_RWops * src) { |
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| 415 | xcf_level * l; |
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| 416 | int i; |
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| 417 | |||
| 418 | l = (xcf_level *) malloc (sizeof (xcf_level)); |
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| 419 | l->width = SDL_ReadBE32 (src); |
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| 420 | l->height = SDL_ReadBE32 (src); |
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| 421 | |||
| 422 | l->tile_file_offsets = NULL; |
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| 423 | i = 0; |
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| 424 | do { |
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| 425 | l->tile_file_offsets = (Uint32 *) realloc (l->tile_file_offsets, sizeof (Uint32) * (i+1)); |
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| 426 | l->tile_file_offsets [i] = SDL_ReadBE32 (src); |
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| 427 | } while (l->tile_file_offsets [i++]); |
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| 428 | |||
| 429 | return l; |
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| 430 | } |
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| 431 | |||
| 432 | void free_xcf_tile (unsigned char * t) { |
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| 433 | free (t); |
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| 434 | } |
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| 435 | |||
| 436 | unsigned char * load_xcf_tile_none (SDL_RWops * src, Uint32 len, int bpp, int x, int y) { |
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| 437 | unsigned char * load; |
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| 438 | |||
| 439 | load = (char *) malloc (len); // expect this is okay |
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| 440 | SDL_RWread (src, load, len, 1); |
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| 441 | |||
| 442 | return load; |
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| 443 | } |
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| 444 | |||
| 445 | unsigned char * load_xcf_tile_rle (SDL_RWops * src, Uint32 len, int bpp, int x, int y) { |
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| 446 | unsigned char * load, * t, * data, * d; |
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| 447 | Uint32 reallen; |
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| 448 | int i, size, count, j, length; |
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| 449 | unsigned char val; |
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| 450 | |||
| 451 | t = load = (char *) malloc (len); |
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| 452 | reallen = SDL_RWread (src, t, 1, len); |
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| 453 | |||
| 454 | data = (char *) malloc (x*y*bpp); |
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| 455 | for (i = 0; i < bpp; i++) { |
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| 456 | d = data + i; |
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| 457 | size = x*y; |
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| 458 | count = 0; |
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| 459 | |||
| 460 | while (size > 0) { |
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| 461 | val = *t++; |
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| 462 | |||
| 463 | length = val; |
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| 464 | if (length >= 128) { |
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| 465 | length = 255 - (length - 1); |
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| 466 | if (length == 128) { |
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| 467 | length = (*t << 8) + t[1]; |
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| 468 | t += 2; |
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| 469 | } |
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| 470 | |||
| 471 | count += length; |
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| 472 | size -= length; |
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| 473 | |||
| 474 | while (length-- > 0) { |
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| 475 | *d = *t++; |
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| 476 | d += bpp; |
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| 477 | } |
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| 478 | } |
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| 479 | else { |
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| 480 | length += 1; |
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| 481 | if (length == 128) { |
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| 482 | length = (*t << 8) + t[1]; |
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| 483 | t += 2; |
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| 484 | } |
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| 485 | |||
| 486 | count += length; |
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| 487 | size -= length; |
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| 488 | |||
| 489 | val = *t++; |
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| 490 | |||
| 491 | for (j = 0; j < length; j++) { |
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| 492 | *d = val; |
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| 493 | d += bpp; |
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| 494 | } |
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| 495 | } |
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| 496 | } |
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| 497 | } |
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| 498 | |||
| 499 | free (load); |
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| 500 | return (data); |
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| 501 | } |
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| 502 | |||
| 503 | static Uint32 rgb2grey (Uint32 a) { |
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| 504 | Uint8 l; |
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| 505 | l = 0.2990 * ((a && 0x00FF0000) >> 16) |
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| 506 | + 0.5870 * ((a && 0x0000FF00) >> 8) |
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| 507 | + 0.1140 * ((a && 0x000000FF)); |
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| 508 | |||
| 509 | return (l << 16) | (l << 8) | l; |
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| 510 | } |
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| 511 | |||
| 512 | void create_channel_surface (SDL_Surface * surf, xcf_image_type itype, Uint32 color, Uint32 opacity) { |
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| 513 | Uint32 c; |
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| 514 | |||
| 515 | switch (itype) { |
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| 516 | case IMAGE_RGB: |
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| 517 | case IMAGE_INDEXED: |
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| 518 | c = opacity | color; |
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| 519 | break; |
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| 520 | case IMAGE_GREYSCALE: |
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| 521 | c = opacity | rgb2grey (color); |
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| 522 | break; |
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| 523 | } |
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| 524 | SDL_FillRect (surf, NULL, c); |
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| 525 | } |
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| 526 | |||
| 527 | int do_layer_surface (SDL_Surface * surface, SDL_RWops * src, xcf_header * head, xcf_layer * layer, load_tile_type load_tile) { |
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| 528 | xcf_hierarchy * hierarchy; |
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| 529 | xcf_level * level; |
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| 530 | unsigned char * tile; |
||
| 531 | Uint8 * p8; |
||
| 532 | Uint16 * p16; |
||
| 533 | Uint32 * p; |
||
| 534 | int x, y, tx, ty, ox, oy, width, height, i, j; |
||
| 535 | Uint32 *row; |
||
| 536 | |||
| 537 | SDL_RWseek (src, layer->hierarchy_file_offset, SEEK_SET); |
||
| 538 | hierarchy = read_xcf_hierarchy (src); |
||
| 539 | |||
| 540 | level = NULL; |
||
| 541 | for (i = 0; hierarchy->level_file_offsets [i]; i++) { |
||
| 542 | SDL_RWseek (src, hierarchy->level_file_offsets [i], SEEK_SET); |
||
| 543 | level = read_xcf_level (src); |
||
| 544 | |||
| 545 | ty = tx = 0; |
||
| 546 | for (j = 0; level->tile_file_offsets [j]; j++) { |
||
| 547 | SDL_RWseek (src, level->tile_file_offsets [j], SEEK_SET); |
||
| 548 | ox = tx+64 > level->width ? level->width % 64 : 64; |
||
| 549 | oy = ty+64 > level->height ? level->height % 64 : 64; |
||
| 550 | |||
| 551 | if (level->tile_file_offsets [j+1]) { |
||
| 552 | tile = load_tile |
||
| 553 | (src, |
||
| 554 | level->tile_file_offsets [j+1] - level->tile_file_offsets [j], |
||
| 555 | hierarchy->bpp, |
||
| 556 | ox, oy); |
||
| 557 | } |
||
| 558 | else { |
||
| 559 | tile = load_tile |
||
| 560 | (src, |
||
| 561 | ox*oy*6, |
||
| 562 | hierarchy->bpp, |
||
| 563 | ox, oy); |
||
| 564 | } |
||
| 565 | |||
| 566 | p8 = tile; |
||
| 567 | p16 = (Uint16 *) p8; |
||
| 568 | p = (Uint32 *) p8; |
||
| 569 | for (y=ty; y < ty+oy; y++) { |
||
| 570 | row = (Uint32 *)((Uint8 *)surface->pixels + y*surface->pitch + tx*4); |
||
| 571 | switch (hierarchy->bpp) { |
||
| 572 | case 4: |
||
| 573 | for (x=tx; x < tx+ox; x++) |
||
| 574 | *row++ = Swap32 (*p++); |
||
| 575 | break; |
||
| 576 | case 3: |
||
| 577 | for (x=tx; x < tx+ox; x++) { |
||
| 578 | *row = 0xFF000000; |
||
| 579 | *row |= ((Uint32) *(p8++) << 16); |
||
| 580 | *row |= ((Uint32) *(p8++) << 8); |
||
| 581 | *row |= ((Uint32) *(p8++) << 0); |
||
| 582 | row++; |
||
| 583 | } |
||
| 584 | break; |
||
| 585 | case 2: // Indexed/Greyscale + Alpha |
||
| 586 | switch (head->image_type) { |
||
| 587 | case IMAGE_INDEXED: |
||
| 588 | for (x=tx; x < tx+ox; x++) { |
||
| 589 | *row = ((Uint32) (head->cm_map [*p8*3]) << 16); |
||
| 590 | *row |= ((Uint32) (head->cm_map [*p8*3+1]) << 8); |
||
| 591 | *row |= ((Uint32) (head->cm_map [*p8++*3+2]) << 0); |
||
| 592 | *row |= ((Uint32) *p8++ << 24);; |
||
| 593 | row++; |
||
| 594 | } |
||
| 595 | break; |
||
| 596 | case IMAGE_GREYSCALE: |
||
| 597 | for (x=tx; x < tx+ox; x++) { |
||
| 598 | *row = ((Uint32) *p8 << 16); |
||
| 599 | *row |= ((Uint32) *p8 << 8); |
||
| 600 | *row |= ((Uint32) *p8++ << 0); |
||
| 601 | *row |= ((Uint32) *p8++ << 24);; |
||
| 602 | row++; |
||
| 603 | } |
||
| 604 | break; |
||
| 605 | default: |
||
| 606 | fprintf (stderr, "Unknown Gimp image type (%d)\n", head->image_type); |
||
| 607 | return 1; |
||
| 608 | } |
||
| 609 | break; |
||
| 610 | case 1: // Indexed/Greyscale |
||
| 611 | switch (head->image_type) { |
||
| 612 | case IMAGE_INDEXED: |
||
| 613 | for (x = tx; x < tx+ox; x++) { |
||
| 614 | *row++ = 0xFF000000 |
||
| 615 | | ((Uint32) (head->cm_map [*p8*3]) << 16) |
||
| 616 | | ((Uint32) (head->cm_map [*p8*3+1]) << 8) |
||
| 617 | | ((Uint32) (head->cm_map [*p8*3+2]) << 0); |
||
| 618 | p8++; |
||
| 619 | } |
||
| 620 | break; |
||
| 621 | case IMAGE_GREYSCALE: |
||
| 622 | for (x=tx; x < tx+ox; x++) { |
||
| 623 | *row++ = 0xFF000000 |
||
| 624 | | (((Uint32) (*p8)) << 16) |
||
| 625 | | (((Uint32) (*p8)) << 8) |
||
| 626 | | (((Uint32) (*p8++)) << 0); |
||
| 627 | } |
||
| 628 | break; |
||
| 629 | default: |
||
| 630 | fprintf (stderr, "Unknown Gimp image type (%d)\n", head->image_type); |
||
| 631 | return 1; |
||
| 632 | } |
||
| 633 | break; |
||
| 634 | } |
||
| 635 | } |
||
| 636 | tx += 64; |
||
| 637 | if (tx >= level->width) { |
||
| 638 | tx = 0; |
||
| 639 | ty += 64; |
||
| 640 | } |
||
| 641 | if (ty >= level->height) { |
||
| 642 | break; |
||
| 643 | } |
||
| 644 | |||
| 645 | free_xcf_tile (tile); |
||
| 646 | } |
||
| 647 | free_xcf_level (level); |
||
| 648 | } |
||
| 649 | |||
| 650 | free_xcf_hierarchy (hierarchy); |
||
| 651 | } |
||
| 652 | |||
| 653 | SDL_Surface *IMG_LoadXCF_RW(SDL_RWops *src) { |
||
| 654 | SDL_Surface *surface, *lays; |
||
| 655 | xcf_header * head; |
||
| 656 | xcf_layer * layer; |
||
| 657 | xcf_channel ** channel; |
||
| 658 | int read_error, chnls, i, offsets; |
||
| 659 | Uint32 offset, fp; |
||
| 660 | |||
| 661 | unsigned char * (* load_tile) (SDL_RWops *, Uint32, int, int, int); |
||
| 662 | |||
| 663 | /* Initialize the data we will clean up when we're done */ |
||
| 664 | surface = NULL; |
||
| 665 | read_error = 0; |
||
| 666 | |||
| 667 | /* Check to make sure we have something to do */ |
||
| 668 | if ( ! src ) { |
||
| 669 | goto done; |
||
| 670 | } |
||
| 671 | |||
| 672 | head = read_xcf_header (src); |
||
| 673 | |||
| 674 | switch (head->compr) { |
||
| 675 | case COMPR_NONE: |
||
| 676 | load_tile = load_xcf_tile_none; |
||
| 677 | break; |
||
| 678 | case COMPR_RLE: |
||
| 679 | load_tile = load_xcf_tile_rle; |
||
| 680 | break; |
||
| 681 | default: |
||
| 682 | fprintf (stderr, "Unsupported Compression.\n"); |
||
| 683 | free_xcf_header (head); |
||
| 684 | return NULL; |
||
| 685 | } |
||
| 686 | |||
| 687 | /* Create the surface of the appropriate type */ |
||
| 688 | surface = SDL_AllocSurface(SDL_SWSURFACE, head->width, head->height, 32, |
||
| 689 | 0x00FF0000,0x0000FF00,0x000000FF,0xFF000000); |
||
| 690 | |||
| 691 | if ( surface == NULL ) { |
||
| 692 | IMG_SetError("Out of memory"); |
||
| 693 | goto done; |
||
| 694 | } |
||
| 695 | |||
| 696 | head->layer_file_offsets = NULL; |
||
| 697 | offsets = 0; |
||
| 698 | |||
| 699 | while (offset = SDL_ReadBE32 (src)) { |
||
| 700 | head->layer_file_offsets = (Uint32 *) realloc (head->layer_file_offsets, sizeof (Uint32) * (offsets+1)); |
||
| 701 | head->layer_file_offsets [offsets] = offset; |
||
| 702 | offsets++; |
||
| 703 | } |
||
| 704 | fp = SDL_RWtell (src); |
||
| 705 | |||
| 706 | lays = SDL_AllocSurface(SDL_SWSURFACE, head->width, head->height, 32, |
||
| 707 | 0x00FF0000,0x0000FF00,0x000000FF,0xFF000000); |
||
| 708 | |||
| 709 | if ( lays == NULL ) { |
||
| 710 | IMG_SetError("Out of memory"); |
||
| 711 | goto done; |
||
| 712 | } |
||
| 713 | |||
| 714 | // Blit layers backwards, because Gimp saves them highest first |
||
| 715 | for (i = offsets; i > 0; i--) { |
||
| 716 | SDL_Rect rs, rd; |
||
| 717 | SDL_RWseek (src, head->layer_file_offsets [i-1], SEEK_SET); |
||
| 718 | |||
| 719 | layer = read_xcf_layer (src); |
||
| 720 | do_layer_surface (lays, src, head, layer, load_tile); |
||
| 721 | rs.x = 0; |
||
| 722 | rs.y = 0; |
||
| 723 | rs.w = layer->width; |
||
| 724 | rs.h = layer->height; |
||
| 725 | rd.x = layer->offset_x; |
||
| 726 | rd.y = layer->offset_y; |
||
| 727 | rd.w = layer->width; |
||
| 728 | rd.h = layer->height; |
||
| 729 | free_xcf_layer (layer); |
||
| 730 | |||
| 731 | SDL_BlitSurface (lays, &rs, surface, &rd); |
||
| 732 | } |
||
| 733 | |||
| 734 | SDL_FreeSurface (lays); |
||
| 735 | |||
| 736 | SDL_RWseek (src, fp, SEEK_SET); |
||
| 737 | |||
| 738 | // read channels |
||
| 739 | channel = NULL; |
||
| 740 | chnls = 0; |
||
| 741 | while (offset = SDL_ReadBE32 (src)) { |
||
| 742 | channel = (xcf_channel **) realloc (channel, sizeof (xcf_channel *) * (chnls+1)); |
||
| 743 | fp = SDL_RWtell (src); |
||
| 744 | SDL_RWseek (src, offset, SEEK_SET); |
||
| 745 | channel [chnls++] = (read_xcf_channel (src)); |
||
| 746 | SDL_RWseek (src, fp, SEEK_SET); |
||
| 747 | } |
||
| 748 | |||
| 749 | if (chnls) { |
||
| 750 | SDL_Surface * chs; |
||
| 751 | |||
| 752 | chs = SDL_AllocSurface(SDL_SWSURFACE, head->width, head->height, 32, |
||
| 753 | 0x00FF0000,0x0000FF00,0x000000FF,0xFF000000); |
||
| 754 | |||
| 755 | if (chs == NULL) { |
||
| 756 | IMG_SetError("Out of memory"); |
||
| 757 | goto done; |
||
| 758 | } |
||
| 759 | for (i = 0; i < chnls; i++) { |
||
| 760 | // printf ("CNLBLT %i\n", i); |
||
| 761 | if (!channel [i]->selection) { |
||
| 762 | create_channel_surface (chs, head->image_type, channel [i]->color, channel [i]->opacity); |
||
| 763 | SDL_BlitSurface (chs, NULL, surface, NULL); |
||
| 764 | } |
||
| 765 | free_xcf_channel (channel [i]); |
||
| 766 | } |
||
| 767 | |||
| 768 | SDL_FreeSurface (chs); |
||
| 769 | } |
||
| 770 | |||
| 771 | done: |
||
| 772 | free_xcf_header (head); |
||
| 773 | if ( read_error ) { |
||
| 774 | SDL_FreeSurface(surface); |
||
| 775 | IMG_SetError("Error reading XCF data"); |
||
| 776 | surface = NULL; |
||
| 777 | } |
||
| 778 | |||
| 779 | return(surface); |
||
| 780 | } |
||
| 781 | |||
| 782 | #else |
||
| 783 | |||
| 784 | /* See if an image is contained in a data source */ |
||
| 785 | int IMG_isXCF(SDL_RWops *src) |
||
| 786 | { |
||
| 787 | return(0); |
||
| 788 | } |
||
| 789 | |||
| 790 | /* Load a XCF type image from an SDL datasource */ |
||
| 791 | SDL_Surface *IMG_LoadXCF_RW(SDL_RWops *src) |
||
| 792 | { |
||
| 793 | return(NULL); |
||
| 794 | } |
||
| 795 | |||
| 796 | #endif /* LOAD_XCF */ |