[18608] | 1 | /* vim: set sw=4: -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ |
---|
| 2 | /* |
---|
| 3 | rsvg-styles.c: Handle SVG styles |
---|
| 4 | |
---|
| 5 | Copyright (C) 2000 Eazel, Inc. |
---|
| 6 | Copyright (C) 2002 Dom Lachowicz <cinamod@hotmail.com> |
---|
| 7 | |
---|
| 8 | This program is free software; you can redistribute it and/or |
---|
| 9 | modify it under the terms of the GNU Library General Public License as |
---|
| 10 | published by the Free Software Foundation; either version 2 of the |
---|
| 11 | License, or (at your option) any later version. |
---|
| 12 | |
---|
| 13 | This program is distributed in the hope that it will be useful, |
---|
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
---|
| 16 | Library General Public License for more details. |
---|
| 17 | |
---|
| 18 | You should have received a copy of the GNU Library General Public |
---|
| 19 | License along with this program; if not, write to the |
---|
| 20 | Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
---|
| 21 | Boston, MA 02111-1307, USA. |
---|
| 22 | |
---|
| 23 | Author: Raph Levien <raph@artofcode.com> |
---|
| 24 | */ |
---|
[18804] | 25 | #include <string.h> |
---|
[18608] | 26 | |
---|
| 27 | #include "rsvg.h" |
---|
| 28 | #include "rsvg-css.h" |
---|
| 29 | #include "rsvg-styles.h" |
---|
| 30 | #include "rsvg-private.h" |
---|
| 31 | |
---|
| 32 | #include <libart_lgpl/art_rgba.h> |
---|
| 33 | #include <libart_lgpl/art_affine.h> |
---|
| 34 | |
---|
| 35 | /* Our default font */ |
---|
| 36 | #define DEFAULT_FONT "Times Roman" |
---|
| 37 | |
---|
| 38 | gdouble |
---|
| 39 | rsvg_viewport_percentage (gdouble width, gdouble height) |
---|
| 40 | { |
---|
| 41 | return ((width * width) + (height * height)) / M_SQRT2; |
---|
| 42 | } |
---|
| 43 | |
---|
| 44 | void |
---|
| 45 | rsvg_state_init (RsvgState *state) |
---|
| 46 | { |
---|
| 47 | memset (state, 0, sizeof (*state)); |
---|
| 48 | |
---|
| 49 | art_affine_identity (state->affine); |
---|
| 50 | |
---|
| 51 | state->opacity = 0xff; |
---|
| 52 | state->fill = rsvg_paint_server_parse (NULL, "#000"); |
---|
| 53 | state->fill_opacity = 0xff; |
---|
| 54 | state->stroke_opacity = 0xff; |
---|
| 55 | state->stroke_width = 1; |
---|
| 56 | state->miter_limit = 4; |
---|
| 57 | state->cap = ART_PATH_STROKE_CAP_BUTT; |
---|
| 58 | state->join = ART_PATH_STROKE_JOIN_MITER; |
---|
| 59 | state->stop_opacity = 0xff; |
---|
| 60 | |
---|
| 61 | state->font_family = g_strdup (DEFAULT_FONT); |
---|
| 62 | state->font_size = 12.0; |
---|
| 63 | state->font_style = PANGO_STYLE_NORMAL; |
---|
| 64 | state->font_variant = PANGO_VARIANT_NORMAL; |
---|
| 65 | state->font_weight = PANGO_WEIGHT_NORMAL; |
---|
| 66 | state->font_stretch = PANGO_STRETCH_NORMAL; |
---|
| 67 | |
---|
| 68 | state->visible = TRUE; |
---|
| 69 | } |
---|
| 70 | |
---|
| 71 | void |
---|
| 72 | rsvg_state_clone (RsvgState *dst, const RsvgState *src) |
---|
| 73 | { |
---|
| 74 | gint i; |
---|
| 75 | |
---|
| 76 | *dst = *src; |
---|
| 77 | dst->font_family = g_strdup (src->font_family); |
---|
| 78 | rsvg_paint_server_ref (dst->fill); |
---|
| 79 | rsvg_paint_server_ref (dst->stroke); |
---|
| 80 | dst->save_pixbuf = NULL; |
---|
| 81 | |
---|
| 82 | if (src->dash.n_dash > 0) |
---|
| 83 | { |
---|
| 84 | dst->dash.dash = g_new (gdouble, src->dash.n_dash); |
---|
| 85 | for (i = 0; i < src->dash.n_dash; i++) |
---|
| 86 | dst->dash.dash[i] = src->dash.dash[i]; |
---|
| 87 | } |
---|
| 88 | } |
---|
| 89 | |
---|
| 90 | void |
---|
| 91 | rsvg_state_finalize (RsvgState *state) |
---|
| 92 | { |
---|
| 93 | g_free (state->font_family); |
---|
| 94 | rsvg_paint_server_unref (state->fill); |
---|
| 95 | rsvg_paint_server_unref (state->stroke); |
---|
| 96 | |
---|
| 97 | if (state->dash.n_dash != 0) |
---|
| 98 | g_free (state->dash.dash); |
---|
| 99 | } |
---|
| 100 | |
---|
| 101 | /* Parse a CSS2 style argument, setting the SVG context attributes. */ |
---|
| 102 | static void |
---|
| 103 | rsvg_parse_style_arg (RsvgHandle *ctx, RsvgState *state, const char *str) |
---|
| 104 | { |
---|
| 105 | RsvgState * parent_state = state; /* TODO: temporary hack */ |
---|
| 106 | int arg_off; |
---|
| 107 | |
---|
| 108 | arg_off = rsvg_css_param_arg_offset (str); |
---|
| 109 | if (rsvg_css_param_match (str, "opacity")) |
---|
| 110 | { |
---|
| 111 | state->opacity = rsvg_css_parse_opacity (str + arg_off); |
---|
| 112 | } |
---|
| 113 | else if (rsvg_css_param_match (str, "display")) |
---|
| 114 | { |
---|
| 115 | if (!strcmp (str + arg_off, "none")) |
---|
| 116 | state->visible = FALSE; |
---|
| 117 | else if (strcmp (str + arg_off, "inherit") != 0) |
---|
| 118 | state->visible = TRUE; |
---|
| 119 | /* else inherit */ |
---|
| 120 | } |
---|
| 121 | else if (rsvg_css_param_match (str, "visibility")) |
---|
| 122 | { |
---|
| 123 | if (!strcmp (str + arg_off, "visable")) |
---|
| 124 | state->visible = TRUE; |
---|
| 125 | else if (strcmp (str + arg_off, "inherit") != 0) |
---|
| 126 | state->visible = FALSE; /* collapse or hidden */ |
---|
| 127 | /* else inherit */ |
---|
| 128 | } |
---|
| 129 | else if (rsvg_css_param_match (str, "fill")) |
---|
| 130 | { |
---|
| 131 | rsvg_paint_server_unref (state->fill); |
---|
| 132 | state->fill = rsvg_paint_server_parse (ctx->defs, str + arg_off); |
---|
| 133 | } |
---|
| 134 | else if (rsvg_css_param_match (str, "fill-opacity")) |
---|
| 135 | { |
---|
| 136 | state->fill_opacity = rsvg_css_parse_opacity (str + arg_off); |
---|
| 137 | } |
---|
| 138 | else if (rsvg_css_param_match (str, "stroke")) |
---|
| 139 | { |
---|
| 140 | rsvg_paint_server_unref (state->stroke); |
---|
| 141 | state->stroke = rsvg_paint_server_parse (ctx->defs, str + arg_off); |
---|
| 142 | } |
---|
| 143 | else if (rsvg_css_param_match (str, "stroke-width")) |
---|
| 144 | { |
---|
| 145 | state->stroke_width = rsvg_css_parse_normalized_length (str + arg_off, ctx->dpi, |
---|
| 146 | (gdouble)ctx->height, state->font_size); |
---|
| 147 | } |
---|
| 148 | else if (rsvg_css_param_match (str, "stroke-linecap")) |
---|
| 149 | { |
---|
| 150 | if (!strcmp (str + arg_off, "butt")) |
---|
| 151 | state->cap = ART_PATH_STROKE_CAP_BUTT; |
---|
| 152 | else if (!strcmp (str + arg_off, "round")) |
---|
| 153 | state->cap = ART_PATH_STROKE_CAP_ROUND; |
---|
| 154 | else if (!strcmp (str + arg_off, "square")) |
---|
| 155 | state->cap = ART_PATH_STROKE_CAP_SQUARE; |
---|
| 156 | else |
---|
| 157 | g_warning ("unknown line cap style %s", str + arg_off); |
---|
| 158 | } |
---|
| 159 | else if (rsvg_css_param_match (str, "stroke-opacity")) |
---|
| 160 | { |
---|
| 161 | state->stroke_opacity = rsvg_css_parse_opacity (str + arg_off); |
---|
| 162 | } |
---|
| 163 | else if (rsvg_css_param_match (str, "stroke-linejoin")) |
---|
| 164 | { |
---|
| 165 | if (!strcmp (str + arg_off, "miter")) |
---|
| 166 | state->join = ART_PATH_STROKE_JOIN_MITER; |
---|
| 167 | else if (!strcmp (str + arg_off, "round")) |
---|
| 168 | state->join = ART_PATH_STROKE_JOIN_ROUND; |
---|
| 169 | else if (!strcmp (str + arg_off, "bevel")) |
---|
| 170 | state->join = ART_PATH_STROKE_JOIN_BEVEL; |
---|
| 171 | else |
---|
| 172 | g_warning ("unknown line join style %s", str + arg_off); |
---|
| 173 | } |
---|
| 174 | else if (rsvg_css_param_match (str, "font-size")) |
---|
| 175 | { |
---|
| 176 | state->font_size = rsvg_css_parse_normalized_length (str + arg_off, ctx->dpi, |
---|
| 177 | (gdouble)ctx->height, state->font_size); |
---|
| 178 | } |
---|
| 179 | else if (rsvg_css_param_match (str, "font-family")) |
---|
| 180 | { |
---|
| 181 | char * save = g_strdup (rsvg_css_parse_font_family (str + arg_off, parent_state->font_family)); |
---|
| 182 | g_free (state->font_family); |
---|
| 183 | state->font_family = save; |
---|
| 184 | } |
---|
| 185 | else if (rsvg_css_param_match (str, "font-style")) |
---|
| 186 | { |
---|
| 187 | state->font_style = rsvg_css_parse_font_style (str + arg_off, parent_state->font_style); |
---|
| 188 | } |
---|
| 189 | else if (rsvg_css_param_match (str, "font-variant")) |
---|
| 190 | { |
---|
| 191 | state->font_variant = rsvg_css_parse_font_variant (str + arg_off, parent_state->font_variant); |
---|
| 192 | } |
---|
| 193 | else if (rsvg_css_param_match (str, "font-weight")) |
---|
| 194 | { |
---|
| 195 | state->font_weight = rsvg_css_parse_font_weight (str + arg_off, parent_state->font_weight); |
---|
| 196 | } |
---|
| 197 | else if (rsvg_css_param_match (str, "font-stretch")) |
---|
| 198 | { |
---|
| 199 | state->font_stretch = rsvg_css_parse_font_stretch (str + arg_off, parent_state->font_stretch); |
---|
| 200 | } |
---|
| 201 | else if (rsvg_css_param_match (str, "text-decoration")) |
---|
| 202 | { |
---|
| 203 | if (!strcmp (str, "inherit")) |
---|
| 204 | state->font_decor = parent_state->font_decor; |
---|
| 205 | else |
---|
| 206 | { |
---|
| 207 | if (strstr (str, "underline")) |
---|
| 208 | state->font_decor |= TEXT_UNDERLINE; |
---|
| 209 | if (strstr (str, "overline")) |
---|
| 210 | state->font_decor |= TEXT_OVERLINE; |
---|
| 211 | if (strstr (str, "strike") || strstr (str, "line-through")) /* strike though or line-through */ |
---|
| 212 | state->font_decor |= TEXT_STRIKE; |
---|
| 213 | } |
---|
| 214 | } |
---|
| 215 | else if (rsvg_css_param_match (str, "stop-color")) |
---|
| 216 | { |
---|
| 217 | state->stop_color = rsvg_css_parse_color (str + arg_off); |
---|
| 218 | } |
---|
| 219 | else if (rsvg_css_param_match (str, "stop-opacity")) |
---|
| 220 | { |
---|
| 221 | state->stop_opacity = rsvg_css_parse_opacity (str + arg_off); |
---|
| 222 | } |
---|
| 223 | else if (rsvg_css_param_match (str, "stroke-miterlimit")) |
---|
| 224 | { |
---|
| 225 | state->miter_limit = g_ascii_strtod (str + arg_off, NULL); |
---|
| 226 | } |
---|
| 227 | else if (rsvg_css_param_match (str, "stroke-dashoffset")) |
---|
| 228 | { |
---|
| 229 | state->dash.offset = rsvg_css_parse_normalized_length (str + arg_off, ctx->dpi, |
---|
| 230 | rsvg_viewport_percentage((gdouble)ctx->width, (gdouble)ctx->height), state->font_size); |
---|
| 231 | if (state->dash.offset < 0.) |
---|
| 232 | state->dash.offset = 0.; |
---|
| 233 | } |
---|
| 234 | else if (rsvg_css_param_match (str, "stroke-dasharray")) |
---|
| 235 | { |
---|
| 236 | if(!strcmp(str + arg_off, "none")) |
---|
| 237 | { |
---|
| 238 | if (state->dash.n_dash != 0) |
---|
| 239 | { |
---|
| 240 | /* free any cloned dash data */ |
---|
| 241 | g_free (state->dash.dash); |
---|
| 242 | state->dash.n_dash = 0; |
---|
| 243 | } |
---|
| 244 | } |
---|
| 245 | else |
---|
| 246 | { |
---|
| 247 | gchar ** dashes = g_strsplit (str + arg_off, ",", -1); |
---|
| 248 | if (NULL != dashes) |
---|
| 249 | { |
---|
| 250 | gint n_dashes, i; |
---|
| 251 | gboolean is_even = FALSE ; |
---|
| 252 | |
---|
| 253 | /* count the #dashes */ |
---|
| 254 | for (n_dashes = 0; dashes[n_dashes] != NULL; n_dashes++) |
---|
| 255 | ; |
---|
| 256 | |
---|
| 257 | is_even = (n_dashes % 2 == 0); |
---|
| 258 | state->dash.n_dash = (is_even ? n_dashes : n_dashes * 2); |
---|
| 259 | state->dash.dash = g_new (double, state->dash.n_dash); |
---|
| 260 | |
---|
| 261 | /* TODO: handle negative value == error case */ |
---|
| 262 | |
---|
| 263 | /* the even and base case */ |
---|
| 264 | for (i = 0; i < n_dashes; i++) |
---|
| 265 | state->dash.dash[i] = g_ascii_strtod (dashes[i], NULL); |
---|
| 266 | |
---|
| 267 | /* if an odd number of dashes is found, it gets repeated */ |
---|
| 268 | if (!is_even) |
---|
| 269 | for (; i < state->dash.n_dash; i++) |
---|
| 270 | state->dash.dash[i] = g_ascii_strtod (dashes[i - n_dashes], NULL); |
---|
| 271 | |
---|
| 272 | g_strfreev (dashes) ; |
---|
| 273 | } |
---|
| 274 | } |
---|
| 275 | } |
---|
| 276 | } |
---|
| 277 | |
---|
| 278 | /* tell whether @str is a supported style argument |
---|
| 279 | whenever something gets added to parse_arg, please |
---|
| 280 | remember to add it here too |
---|
| 281 | */ |
---|
| 282 | gboolean |
---|
| 283 | rsvg_is_style_arg(const char *str) |
---|
| 284 | { |
---|
| 285 | static GHashTable *styles = NULL; |
---|
| 286 | if (!styles) |
---|
| 287 | { |
---|
| 288 | styles = g_hash_table_new (g_str_hash, g_str_equal); |
---|
| 289 | |
---|
| 290 | g_hash_table_insert (styles, "display", GINT_TO_POINTER (TRUE)); |
---|
| 291 | g_hash_table_insert (styles, "fill", GINT_TO_POINTER (TRUE)); |
---|
| 292 | g_hash_table_insert (styles, "fill-opacity", GINT_TO_POINTER (TRUE)); |
---|
| 293 | g_hash_table_insert (styles, "font-family", GINT_TO_POINTER (TRUE)); |
---|
| 294 | g_hash_table_insert (styles, "font-size", GINT_TO_POINTER (TRUE)); |
---|
| 295 | g_hash_table_insert (styles, "font-stretch", GINT_TO_POINTER (TRUE)); |
---|
| 296 | g_hash_table_insert (styles, "font-style", GINT_TO_POINTER (TRUE)); |
---|
| 297 | g_hash_table_insert (styles, "font-variant", GINT_TO_POINTER (TRUE)); |
---|
| 298 | g_hash_table_insert (styles, "font-weight", GINT_TO_POINTER (TRUE)); |
---|
| 299 | g_hash_table_insert (styles, "opacity", GINT_TO_POINTER (TRUE)); |
---|
| 300 | g_hash_table_insert (styles, "stop-color", GINT_TO_POINTER (TRUE)); |
---|
| 301 | g_hash_table_insert (styles, "stop-opacity", GINT_TO_POINTER (TRUE)); |
---|
| 302 | g_hash_table_insert (styles, "stroke", GINT_TO_POINTER (TRUE)); |
---|
| 303 | g_hash_table_insert (styles, "stroke-dasharray", GINT_TO_POINTER (TRUE)); |
---|
| 304 | g_hash_table_insert (styles, "stroke-dashoffset", GINT_TO_POINTER (TRUE)); |
---|
| 305 | g_hash_table_insert (styles, "stroke-linecap", GINT_TO_POINTER (TRUE)); |
---|
| 306 | g_hash_table_insert (styles, "stroke-linejoin", GINT_TO_POINTER (TRUE)); |
---|
| 307 | g_hash_table_insert (styles, "stroke-miterlimit", GINT_TO_POINTER (TRUE)); |
---|
| 308 | g_hash_table_insert (styles, "stroke-opacity", GINT_TO_POINTER (TRUE)); |
---|
| 309 | g_hash_table_insert (styles, "stroke-width", GINT_TO_POINTER (TRUE)); |
---|
| 310 | g_hash_table_insert (styles, "text-decoration", GINT_TO_POINTER (TRUE)); |
---|
| 311 | g_hash_table_insert (styles, "visibility", GINT_TO_POINTER (TRUE)); |
---|
| 312 | } |
---|
| 313 | |
---|
| 314 | /* this will default to 0 (FALSE) on a failed lookup */ |
---|
| 315 | return GPOINTER_TO_INT (g_hash_table_lookup (styles, str)); |
---|
| 316 | } |
---|
| 317 | |
---|
| 318 | /* take a pair of the form (fill="#ff00ff") and parse it as a style */ |
---|
| 319 | void |
---|
| 320 | rsvg_parse_style_pair (RsvgHandle *ctx, RsvgState *state, |
---|
| 321 | const char *key, const char *val) |
---|
| 322 | { |
---|
| 323 | gchar * str = g_strdup_printf ("%s:%s", key, val); |
---|
| 324 | rsvg_parse_style_arg (ctx, state, str); |
---|
| 325 | g_free (str); |
---|
| 326 | } |
---|
| 327 | |
---|
| 328 | /* Split a CSS2 style into individual style arguments, setting attributes |
---|
| 329 | in the SVG context. |
---|
| 330 | |
---|
| 331 | It's known that this is _way_ out of spec. A more complete CSS2 |
---|
| 332 | implementation will happen later. |
---|
| 333 | */ |
---|
| 334 | void |
---|
| 335 | rsvg_parse_style (RsvgHandle *ctx, RsvgState *state, const char *str) |
---|
| 336 | { |
---|
| 337 | int start, end; |
---|
| 338 | char *arg; |
---|
| 339 | |
---|
| 340 | start = 0; |
---|
| 341 | while (str[start] != '\0') |
---|
| 342 | { |
---|
| 343 | for (end = start; str[end] != '\0' && str[end] != ';'; end++); |
---|
| 344 | arg = g_new (char, 1 + end - start); |
---|
| 345 | memcpy (arg, str + start, end - start); |
---|
| 346 | arg[end - start] = '\0'; |
---|
| 347 | rsvg_parse_style_arg (ctx, state, arg); |
---|
| 348 | g_free (arg); |
---|
| 349 | start = end; |
---|
| 350 | if (str[start] == ';') start++; |
---|
| 351 | while (str[start] == ' ') start++; |
---|
| 352 | } |
---|
| 353 | } |
---|
| 354 | |
---|
| 355 | /* |
---|
| 356 | * Extremely poor man's CSS parser. Not robust. Not compliant. |
---|
| 357 | * Should work well enough for our needs ;-) |
---|
[18804] | 358 | * See also: http://www.w3.org/TR/REC-CSS2/syndata.html |
---|
| 359 | * I should use that sometime in order to make a complaint parser |
---|
[18608] | 360 | */ |
---|
| 361 | void |
---|
| 362 | rsvg_parse_cssbuffer (RsvgHandle *ctx, const char * buff, size_t buflen) |
---|
| 363 | { |
---|
| 364 | size_t loc = 0; |
---|
| 365 | |
---|
| 366 | while (loc < buflen) |
---|
| 367 | { |
---|
[18804] | 368 | GString * style_name = g_string_new (NULL); |
---|
[18608] | 369 | GString * style_props = g_string_new (NULL); |
---|
[18804] | 370 | const char * existing = NULL; |
---|
| 371 | |
---|
[18608] | 372 | /* advance to the style's name */ |
---|
| 373 | while (loc < buflen && g_ascii_isspace (buff[loc])) |
---|
| 374 | loc++; |
---|
| 375 | |
---|
| 376 | while (loc < buflen && !g_ascii_isspace (buff[loc])) |
---|
| 377 | g_string_append_c (style_name, buff[loc++]); |
---|
| 378 | |
---|
| 379 | /* advance to the first { that defines the style's properties */ |
---|
| 380 | while (loc < buflen && buff[loc++] != '{' ) |
---|
| 381 | ; |
---|
| 382 | |
---|
| 383 | while (loc < buflen && g_ascii_isspace (buff[loc])) |
---|
| 384 | loc++; |
---|
| 385 | |
---|
[18804] | 386 | while (loc < buflen && buff[loc] != '}') |
---|
[18608] | 387 | { |
---|
| 388 | /* suck in and append our property */ |
---|
| 389 | while (loc < buflen && buff[loc] != ';' && buff[loc] != '}' ) |
---|
| 390 | g_string_append_c (style_props, buff[loc++]); |
---|
| 391 | |
---|
[18804] | 392 | if (loc == buflen || buff[loc] == '}') |
---|
[18608] | 393 | break; |
---|
| 394 | else |
---|
| 395 | { |
---|
| 396 | g_string_append_c (style_props, ';'); |
---|
| 397 | |
---|
| 398 | /* advance to the next property */ |
---|
| 399 | loc++; |
---|
[18804] | 400 | while (loc < buflen && g_ascii_isspace (buff[loc])) |
---|
[18608] | 401 | loc++; |
---|
| 402 | } |
---|
| 403 | } |
---|
| 404 | |
---|
| 405 | /* push name/style pair into HT */ |
---|
[18804] | 406 | existing = (const char *)g_hash_table_lookup (ctx->css_props, style_name->str); |
---|
| 407 | if (existing != NULL) |
---|
| 408 | g_string_append_len (style_props, existing, strlen (existing)); |
---|
| 409 | |
---|
| 410 | /* will destroy the existing key and value for us */ |
---|
[18608] | 411 | g_hash_table_insert (ctx->css_props, style_name->str, style_props->str); |
---|
[18804] | 412 | |
---|
[18608] | 413 | g_string_free (style_name, FALSE); |
---|
| 414 | g_string_free (style_props, FALSE); |
---|
| 415 | |
---|
| 416 | loc++; |
---|
[18804] | 417 | while (loc < buflen && g_ascii_isspace (buff[loc])) |
---|
[18608] | 418 | loc++; |
---|
| 419 | } |
---|
| 420 | } |
---|
| 421 | |
---|
| 422 | /* Parse an SVG transform string into an affine matrix. Reference: SVG |
---|
| 423 | working draft dated 1999-07-06, section 8.5. Return TRUE on |
---|
| 424 | success. */ |
---|
| 425 | gboolean |
---|
| 426 | rsvg_parse_transform (double dst[6], const char *src) |
---|
| 427 | { |
---|
| 428 | int idx; |
---|
| 429 | char keyword[32]; |
---|
| 430 | double args[6]; |
---|
| 431 | int n_args; |
---|
| 432 | guint key_len; |
---|
| 433 | double tmp_affine[6]; |
---|
| 434 | |
---|
| 435 | art_affine_identity (dst); |
---|
| 436 | |
---|
| 437 | idx = 0; |
---|
| 438 | while (src[idx]) |
---|
| 439 | { |
---|
| 440 | /* skip initial whitespace */ |
---|
| 441 | while (g_ascii_isspace (src[idx])) |
---|
| 442 | idx++; |
---|
| 443 | |
---|
| 444 | /* parse keyword */ |
---|
| 445 | for (key_len = 0; key_len < sizeof (keyword); key_len++) |
---|
| 446 | { |
---|
| 447 | char c; |
---|
| 448 | |
---|
| 449 | c = src[idx]; |
---|
| 450 | if (g_ascii_isalpha (c) || c == '-') |
---|
| 451 | keyword[key_len] = src[idx++]; |
---|
| 452 | else |
---|
| 453 | break; |
---|
| 454 | } |
---|
| 455 | if (key_len >= sizeof (keyword)) |
---|
| 456 | return FALSE; |
---|
| 457 | keyword[key_len] = '\0'; |
---|
| 458 | |
---|
| 459 | /* skip whitespace */ |
---|
| 460 | while (g_ascii_isspace (src[idx])) |
---|
| 461 | idx++; |
---|
| 462 | |
---|
| 463 | if (src[idx] != '(') |
---|
| 464 | return FALSE; |
---|
| 465 | idx++; |
---|
| 466 | |
---|
| 467 | for (n_args = 0; ; n_args++) |
---|
| 468 | { |
---|
| 469 | char c; |
---|
| 470 | char *end_ptr; |
---|
| 471 | |
---|
| 472 | /* skip whitespace */ |
---|
| 473 | while (g_ascii_isspace (src[idx])) |
---|
| 474 | idx++; |
---|
| 475 | c = src[idx]; |
---|
| 476 | if (g_ascii_isdigit (c) || c == '+' || c == '-' || c == '.') |
---|
| 477 | { |
---|
| 478 | if (n_args == sizeof(args) / sizeof(args[0])) |
---|
| 479 | return FALSE; /* too many args */ |
---|
| 480 | args[n_args] = g_ascii_strtod (src + idx, &end_ptr); |
---|
| 481 | idx = end_ptr - src; |
---|
| 482 | |
---|
| 483 | while (g_ascii_isspace (src[idx])) |
---|
| 484 | idx++; |
---|
| 485 | |
---|
| 486 | /* skip optional comma */ |
---|
| 487 | if (src[idx] == ',') |
---|
| 488 | idx++; |
---|
| 489 | } |
---|
| 490 | else if (c == ')') |
---|
| 491 | break; |
---|
| 492 | else |
---|
| 493 | return FALSE; |
---|
| 494 | } |
---|
| 495 | idx++; |
---|
| 496 | |
---|
| 497 | /* ok, have parsed keyword and args, now modify the transform */ |
---|
| 498 | if (!strcmp (keyword, "matrix")) |
---|
| 499 | { |
---|
| 500 | if (n_args != 6) |
---|
| 501 | return FALSE; |
---|
| 502 | art_affine_multiply (dst, args, dst); |
---|
| 503 | } |
---|
| 504 | else if (!strcmp (keyword, "translate")) |
---|
| 505 | { |
---|
| 506 | if (n_args == 1) |
---|
| 507 | args[1] = 0; |
---|
| 508 | else if (n_args != 2) |
---|
| 509 | return FALSE; |
---|
| 510 | art_affine_translate (tmp_affine, args[0], args[1]); |
---|
| 511 | art_affine_multiply (dst, tmp_affine, dst); |
---|
| 512 | } |
---|
| 513 | else if (!strcmp (keyword, "scale")) |
---|
| 514 | { |
---|
| 515 | if (n_args == 1) |
---|
| 516 | args[1] = args[0]; |
---|
| 517 | else if (n_args != 2) |
---|
| 518 | return FALSE; |
---|
| 519 | art_affine_scale (tmp_affine, args[0], args[1]); |
---|
| 520 | art_affine_multiply (dst, tmp_affine, dst); |
---|
| 521 | } |
---|
| 522 | else if (!strcmp (keyword, "rotate")) |
---|
| 523 | { |
---|
| 524 | if (n_args != 1) |
---|
| 525 | return FALSE; |
---|
| 526 | art_affine_rotate (tmp_affine, args[0]); |
---|
| 527 | art_affine_multiply (dst, tmp_affine, dst); |
---|
| 528 | } |
---|
| 529 | else if (!strcmp (keyword, "skewX")) |
---|
| 530 | { |
---|
| 531 | if (n_args != 1) |
---|
| 532 | return FALSE; |
---|
| 533 | art_affine_shear (tmp_affine, args[0]); |
---|
| 534 | art_affine_multiply (dst, tmp_affine, dst); |
---|
| 535 | } |
---|
| 536 | else if (!strcmp (keyword, "skewY")) |
---|
| 537 | { |
---|
| 538 | if (n_args != 1) |
---|
| 539 | return FALSE; |
---|
| 540 | art_affine_shear (tmp_affine, args[0]); |
---|
| 541 | /* transpose the affine, given that we know [1] is zero */ |
---|
| 542 | tmp_affine[1] = tmp_affine[2]; |
---|
| 543 | tmp_affine[2] = 0; |
---|
| 544 | art_affine_multiply (dst, tmp_affine, dst); |
---|
| 545 | } |
---|
| 546 | else |
---|
| 547 | return FALSE; /* unknown keyword */ |
---|
| 548 | } |
---|
| 549 | return TRUE; |
---|
| 550 | } |
---|
| 551 | |
---|
| 552 | /** |
---|
| 553 | * rsvg_parse_transform_attr: Parse transform attribute and apply to state. |
---|
| 554 | * @ctx: Rsvg context. |
---|
| 555 | * @state: State in which to apply the transform. |
---|
| 556 | * @str: String containing transform. |
---|
| 557 | * |
---|
| 558 | * Parses the transform attribute in @str and applies it to @state. |
---|
| 559 | **/ |
---|
| 560 | static void |
---|
| 561 | rsvg_parse_transform_attr (RsvgHandle *ctx, RsvgState *state, const char *str) |
---|
| 562 | { |
---|
| 563 | double affine[6]; |
---|
| 564 | |
---|
| 565 | if (rsvg_parse_transform (affine, str)) |
---|
| 566 | { |
---|
| 567 | art_affine_multiply (state->affine, affine, state->affine); |
---|
| 568 | } |
---|
| 569 | else |
---|
| 570 | { |
---|
| 571 | /* parse error for transform attribute. todo: report */ |
---|
| 572 | } |
---|
| 573 | } |
---|
| 574 | |
---|
| 575 | static gboolean |
---|
| 576 | rsvg_lookup_apply_css_style (RsvgHandle *ctx, const char * target) |
---|
| 577 | { |
---|
| 578 | const char * value = (const char *)g_hash_table_lookup (ctx->css_props, target); |
---|
| 579 | |
---|
| 580 | if (value != NULL) |
---|
| 581 | { |
---|
| 582 | rsvg_parse_style (ctx, &ctx->state[ctx->n_state - 1], |
---|
| 583 | value); |
---|
| 584 | return TRUE; |
---|
| 585 | } |
---|
| 586 | return FALSE; |
---|
| 587 | } |
---|
| 588 | |
---|
| 589 | /** |
---|
| 590 | * rsvg_parse_style_attrs: Parse style attribute. |
---|
| 591 | * @ctx: Rsvg context. |
---|
| 592 | * @tag: The SVG tag we're processing (eg: circle, ellipse), optionally %NULL |
---|
| 593 | * @klazz: The space delimited class list, optionally %NULL |
---|
| 594 | * @atts: Attributes in SAX style. |
---|
| 595 | * |
---|
| 596 | * Parses style and transform attributes and modifies state at top of |
---|
| 597 | * stack. |
---|
| 598 | **/ |
---|
| 599 | void |
---|
| 600 | rsvg_parse_style_attrs (RsvgHandle *ctx, |
---|
| 601 | const char * tag, |
---|
| 602 | const char * klazz, |
---|
| 603 | const char * id, |
---|
| 604 | const xmlChar **atts) |
---|
| 605 | { |
---|
| 606 | int i = 0, j = 0; |
---|
| 607 | char * target = NULL; |
---|
| 608 | gboolean found = FALSE; |
---|
| 609 | GString * klazz_list = NULL; |
---|
| 610 | |
---|
| 611 | /* handle the all-encompassing "star" entry first, ignoring found-ness */ |
---|
| 612 | rsvg_lookup_apply_css_style (ctx, "*"); |
---|
| 613 | |
---|
| 614 | if (id != NULL) |
---|
| 615 | { |
---|
| 616 | target = g_strdup_printf ("#%s", id); |
---|
| 617 | rsvg_lookup_apply_css_style (ctx, target); |
---|
| 618 | g_free (target); |
---|
| 619 | } |
---|
| 620 | |
---|
| 621 | /* todo: see if klazz or tag should accumulate onto tag.klazz */ |
---|
| 622 | |
---|
| 623 | if (tag != NULL && klazz != NULL) |
---|
| 624 | { |
---|
| 625 | target = g_strdup_printf ("%s.%s", tag, klazz); |
---|
| 626 | found = rsvg_lookup_apply_css_style (ctx, target); |
---|
| 627 | g_free (target); |
---|
| 628 | } |
---|
| 629 | |
---|
| 630 | if (found == FALSE) |
---|
| 631 | { |
---|
| 632 | if (tag != NULL) |
---|
| 633 | rsvg_lookup_apply_css_style (ctx, tag); |
---|
| 634 | |
---|
| 635 | if (klazz != NULL) |
---|
| 636 | { |
---|
| 637 | i = strlen (klazz); |
---|
| 638 | while (j < i) |
---|
| 639 | { |
---|
| 640 | klazz_list = g_string_new ("."); |
---|
| 641 | |
---|
| 642 | while (j < i && g_ascii_isspace(klazz[j])) |
---|
| 643 | j++; |
---|
| 644 | |
---|
| 645 | while (j < i && !g_ascii_isspace(klazz[j])) |
---|
| 646 | g_string_append_c (klazz_list, klazz[j++]); |
---|
| 647 | |
---|
| 648 | rsvg_lookup_apply_css_style (ctx, klazz_list->str); |
---|
| 649 | g_string_free (klazz_list, TRUE); |
---|
| 650 | } |
---|
| 651 | } |
---|
| 652 | } |
---|
| 653 | |
---|
| 654 | if (atts != NULL) |
---|
| 655 | { |
---|
| 656 | for (i = 0; atts[i] != NULL; i += 2) |
---|
| 657 | { |
---|
| 658 | if (!strcmp ((char *)atts[i], "style")) |
---|
| 659 | rsvg_parse_style (ctx, &ctx->state[ctx->n_state - 1], |
---|
| 660 | (char *)atts[i + 1]); |
---|
| 661 | else if (!strcmp ((char *)atts[i], "transform")) |
---|
| 662 | rsvg_parse_transform_attr (ctx, &ctx->state[ctx->n_state - 1], |
---|
| 663 | (char *)atts[i + 1]); |
---|
| 664 | else if (rsvg_is_style_arg ((char *)atts[i])) |
---|
| 665 | rsvg_parse_style_pair (ctx, &ctx->state[ctx->n_state - 1], |
---|
| 666 | (char *)atts[i], (char *)atts[i + 1]); |
---|
| 667 | } |
---|
| 668 | } |
---|
| 669 | } |
---|
| 670 | |
---|
| 671 | static void |
---|
| 672 | rsvg_pixmap_destroy (guchar *pixels, gpointer data) |
---|
| 673 | { |
---|
| 674 | g_free (pixels); |
---|
| 675 | } |
---|
| 676 | |
---|
| 677 | /** |
---|
| 678 | * rsvg_push_opacity_group: Begin a new transparency group. |
---|
| 679 | * @ctx: Context in which to push. |
---|
| 680 | * |
---|
| 681 | * Pushes a new transparency group onto the stack. The top of the stack |
---|
| 682 | * is stored in the context, while the "saved" value is in the state |
---|
| 683 | * stack. |
---|
| 684 | **/ |
---|
| 685 | void |
---|
| 686 | rsvg_push_opacity_group (RsvgHandle *ctx) |
---|
| 687 | { |
---|
| 688 | RsvgState *state; |
---|
| 689 | GdkPixbuf *pixbuf; |
---|
| 690 | art_u8 *pixels; |
---|
| 691 | int width, height, rowstride; |
---|
| 692 | |
---|
| 693 | state = &ctx->state[ctx->n_state - 1]; |
---|
| 694 | pixbuf = ctx->pixbuf; |
---|
| 695 | |
---|
| 696 | state->save_pixbuf = pixbuf; |
---|
| 697 | |
---|
| 698 | if (pixbuf == NULL) |
---|
| 699 | { |
---|
| 700 | /* FIXME: What warning/GError here? */ |
---|
| 701 | return; |
---|
| 702 | } |
---|
| 703 | |
---|
| 704 | if (!gdk_pixbuf_get_has_alpha (pixbuf)) |
---|
| 705 | { |
---|
| 706 | g_warning ("push/pop transparency group on non-alpha buffer nyi"); |
---|
| 707 | return; |
---|
| 708 | } |
---|
| 709 | |
---|
| 710 | width = gdk_pixbuf_get_width (pixbuf); |
---|
| 711 | height = gdk_pixbuf_get_height (pixbuf); |
---|
| 712 | rowstride = gdk_pixbuf_get_rowstride (pixbuf); |
---|
| 713 | pixels = g_new (art_u8, rowstride * height); |
---|
| 714 | memset (pixels, 0, rowstride * height); |
---|
| 715 | |
---|
| 716 | pixbuf = gdk_pixbuf_new_from_data (pixels, |
---|
| 717 | GDK_COLORSPACE_RGB, |
---|
| 718 | TRUE, |
---|
| 719 | gdk_pixbuf_get_bits_per_sample (pixbuf), |
---|
| 720 | width, |
---|
| 721 | height, |
---|
| 722 | rowstride, |
---|
| 723 | rsvg_pixmap_destroy, |
---|
| 724 | NULL); |
---|
| 725 | ctx->pixbuf = pixbuf; |
---|
| 726 | } |
---|
| 727 | |
---|
| 728 | /** |
---|
| 729 | * rsvg_pop_opacity_group: End a transparency group. |
---|
| 730 | * @ctx: Context in which to push. |
---|
| 731 | * @opacity: Opacity for blending (0..255). |
---|
| 732 | * |
---|
| 733 | * Pops a new transparency group from the stack, recompositing with the |
---|
| 734 | * next on stack. |
---|
| 735 | **/ |
---|
| 736 | void |
---|
| 737 | rsvg_pop_opacity_group (RsvgHandle *ctx, int opacity) |
---|
| 738 | { |
---|
| 739 | RsvgState *state = &ctx->state[ctx->n_state - 1]; |
---|
| 740 | GdkPixbuf *tos, *nos; |
---|
| 741 | art_u8 *tos_pixels, *nos_pixels; |
---|
| 742 | int width; |
---|
| 743 | int height; |
---|
| 744 | int rowstride; |
---|
| 745 | int x, y; |
---|
| 746 | int tmp; |
---|
| 747 | |
---|
| 748 | tos = ctx->pixbuf; |
---|
| 749 | nos = state->save_pixbuf; |
---|
| 750 | |
---|
| 751 | if (tos == NULL || nos == NULL) |
---|
| 752 | { |
---|
| 753 | /* FIXME: What warning/GError here? */ |
---|
| 754 | return; |
---|
| 755 | } |
---|
| 756 | |
---|
| 757 | if (!gdk_pixbuf_get_has_alpha (nos)) |
---|
| 758 | { |
---|
| 759 | g_warning ("push/pop transparency group on non-alpha buffer nyi"); |
---|
| 760 | return; |
---|
| 761 | } |
---|
| 762 | |
---|
| 763 | width = gdk_pixbuf_get_width (tos); |
---|
| 764 | height = gdk_pixbuf_get_height (tos); |
---|
| 765 | rowstride = gdk_pixbuf_get_rowstride (tos); |
---|
| 766 | |
---|
| 767 | tos_pixels = gdk_pixbuf_get_pixels (tos); |
---|
| 768 | nos_pixels = gdk_pixbuf_get_pixels (nos); |
---|
| 769 | |
---|
| 770 | for (y = 0; y < height; y++) |
---|
| 771 | { |
---|
| 772 | for (x = 0; x < width; x++) |
---|
| 773 | { |
---|
| 774 | art_u8 r, g, b, a; |
---|
| 775 | a = tos_pixels[4 * x + 3]; |
---|
| 776 | if (a) |
---|
| 777 | { |
---|
| 778 | r = tos_pixels[4 * x]; |
---|
| 779 | g = tos_pixels[4 * x + 1]; |
---|
| 780 | b = tos_pixels[4 * x + 2]; |
---|
| 781 | tmp = a * opacity + 0x80; |
---|
| 782 | a = (tmp + (tmp >> 8)) >> 8; |
---|
| 783 | art_rgba_run_alpha (nos_pixels + 4 * x, r, g, b, a, 1); |
---|
| 784 | } |
---|
| 785 | } |
---|
| 786 | tos_pixels += rowstride; |
---|
| 787 | nos_pixels += rowstride; |
---|
| 788 | } |
---|
| 789 | |
---|
| 790 | g_object_unref (tos); |
---|
| 791 | ctx->pixbuf = nos; |
---|
| 792 | } |
---|