1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443
|
/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim: set sw=4 sts=4 ts=4 expandtab: */
/*
rsvg-private.h: Internals of RSVG
Copyright (C) 2000 Eazel, Inc.
Copyright (C) 2002 Dom Lachowicz <cinamod@hotmail.com>
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this program; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
Author: Raph Levien <raph@artofcode.com>
*/
#ifndef RSVG_PRIVATE_H
#define RSVG_PRIVATE_H
#include <cairo.h>
#include "rsvg.h"
#include <libxml/SAX.h>
#include <libxml/xmlmemory.h>
#include <pango/pango.h>
#include <glib.h>
#include <glib-object.h>
#include <math.h>
#if defined(HAVE_FLOAT_H)
# include <float.h>
#endif
G_BEGIN_DECLS
typedef struct RsvgSaxHandler RsvgSaxHandler;
typedef struct RsvgDrawingCtx RsvgDrawingCtx;
typedef struct RsvgRender RsvgRender;
typedef GHashTable RsvgPropertyBag;
typedef struct _RsvgState RsvgState;
typedef struct _RsvgDefs RsvgDefs;
typedef struct _RsvgNode RsvgNode;
typedef struct _RsvgFilter RsvgFilter;
typedef struct _RsvgNodeChars RsvgNodeChars;
/* prepare for gettext */
#ifndef _
#define _(X) X
#endif
#ifndef N_
#define N_(X) X
#endif
#ifndef M_PI
# ifdef G_PI
# define M_PI G_PI
# else
# define M_PI 3.14159265358979323846
# endif /* G_PI */
#endif /* M_PI */
#ifndef DBL_EPSILON
/* 1e-7 is a conservative value. it's less than 2^(1-24) which is
* the epsilon value for a 32-bit float. The regular value for this
* with 64-bit doubles is 2^(1-53) or approximately 1e-16.
*/
# define DBL_EPSILON 1e-7
#endif
/* RSVG_ONE_MINUS_EPSILON:
*
* DBL_EPSILON is the difference between 1 and the least value greater
* than 1 that is representable in the given floating-point type. Then
* 1.0+DBL_EPSILON looks like:
*
* 1.00000000000...0000000001 * 2**0
*
* while 1.0-DBL_EPSILON looks like:
*
* 0.11111111111...1111111111 * 2**0
*
* and so represented as:
*
* 1.1111111111...11111111110 * 2**-1
*
* so, in fact, 1.0-(DBL_EPSILON*.5) works too, but I don't think it
* really matters. So, I'll go with the simple 1.0-DBL_EPSILON here.
*
* The following python session shows these observations:
*
* >>> 1.0 + 2**(1-53)
* 1.0000000000000002
* >>> 1.0 + 2**(1-54)
* 1.0
* >>> 1.0 - 2**(1-53)
* 0.99999999999999978
* >>> 1.0 - 2**(1-54)
* 0.99999999999999989
* >>> 1.0 - 2**(1-53)*.5
* 0.99999999999999989
* >>> 1.0 - 2**(1-55)
* 1.0
*/
#define RSVG_ONE_MINUS_EPSILON (1.0 - DBL_EPSILON)
struct RsvgSaxHandler {
void (*free) (RsvgSaxHandler * self);
void (*start_element) (RsvgSaxHandler * self, const char *name, RsvgPropertyBag * atts);
void (*end_element) (RsvgSaxHandler * self, const char *name);
void (*characters) (RsvgSaxHandler * self, const char *ch, int len);
};
typedef enum {
RSVG_LOAD_POLICY_STRICT
} RsvgLoadPolicy;
#define RSVG_LOAD_POLICY_DEFAULT (RSVG_LOAD_POLICY_STRICT)
struct RsvgHandlePrivate {
RsvgHandleFlags flags;
RsvgLoadPolicy load_policy;
gboolean is_disposed;
gboolean is_closed;
RsvgSizeFunc size_func;
gpointer user_data;
GDestroyNotify user_data_destroy;
/* stack; there is a state for each element */
RsvgDefs *defs;
guint nest_level;
RsvgNode *currentnode;
/* this is the root level of the displayable tree, essentially what the
file is converted into at the end */
RsvgNode *treebase;
GHashTable *css_props;
/* not a handler stack. each nested handler keeps
* track of its parent
*/
RsvgSaxHandler *handler;
int handler_nest;
GHashTable *entities; /* g_malloc'd string -> xmlEntityPtr */
xmlParserCtxtPtr ctxt;
GError **error;
GCancellable *cancellable;
double dpi_x;
double dpi_y;
GString *title;
GString *desc;
GString *metadata;
gchar *base_uri;
GFile *base_gfile;
gboolean finished;
gboolean in_loop; /* see get_dimension() */
gboolean first_write;
GInputStream *data_input_stream; /* for rsvg_handle_write of svgz data */
};
typedef struct {
cairo_rectangle_t rect;
gboolean active;
} RsvgViewBox;
/*Contextual information for the drawing phase*/
struct RsvgDrawingCtx {
RsvgRender *render;
RsvgState *state;
GError **error;
RsvgDefs *defs;
PangoContext *pango_context;
double dpi_x, dpi_y;
RsvgViewBox vb;
GSList *vb_stack;
GSList *drawsub_stack;
GSList *acquired_nodes;
};
/*Abstract base class for context for our backends (one as yet)*/
typedef enum {
RSVG_RENDER_TYPE_INVALID,
RSVG_RENDER_TYPE_BASE,
RSVG_RENDER_TYPE_CAIRO = 8,
RSVG_RENDER_TYPE_CAIRO_CLIP
} RsvgRenderType;
struct RsvgRender {
RsvgRenderType type;
void (*free) (RsvgRender * self);
PangoContext *(*create_pango_context) (RsvgDrawingCtx * ctx);
void (*render_pango_layout) (RsvgDrawingCtx * ctx, PangoLayout *layout,
double x, double y);
void (*render_path) (RsvgDrawingCtx * ctx, const cairo_path_t *path);
void (*render_surface) (RsvgDrawingCtx * ctx, cairo_surface_t *surface,
double x, double y, double w, double h);
void (*pop_discrete_layer) (RsvgDrawingCtx * ctx);
void (*push_discrete_layer) (RsvgDrawingCtx * ctx);
void (*add_clipping_rect) (RsvgDrawingCtx * ctx, double x, double y,
double w, double h);
cairo_surface_t *(*get_surface_of_node) (RsvgDrawingCtx * ctx, RsvgNode * drawable,
double w, double h);
};
static inline RsvgRender *
_rsvg_render_check_type (RsvgRender *render,
RsvgRenderType type)
{
g_assert ((render->type & type) == type);
return render;
}
#define _RSVG_RENDER_CIC(render, render_type, RenderCType) \
((RenderCType*) _rsvg_render_check_type ((render), (render_type)))
typedef struct {
double length;
char factor;
} RsvgLength;
typedef struct {
cairo_rectangle_t rect;
cairo_matrix_t affine;
gboolean virgin;
} RsvgBbox;
typedef enum {
objectBoundingBox, userSpaceOnUse
} RsvgCoordUnits;
typedef enum {
RSVG_NODE_TYPE_INVALID = 0,
RSVG_NODE_TYPE_CHARS,
RSVG_NODE_TYPE_CIRCLE,
RSVG_NODE_TYPE_CLIP_PATH,
RSVG_NODE_TYPE_COMPONENT_TRANFER_FUNCTION,
RSVG_NODE_TYPE_DEFS,
RSVG_NODE_TYPE_ELLIPSE,
RSVG_NODE_TYPE_FILTER,
RSVG_NODE_TYPE_GROUP,
RSVG_NODE_TYPE_IMAGE,
RSVG_NODE_TYPE_LIGHT_SOURCE,
RSVG_NODE_TYPE_LINE,
RSVG_NODE_TYPE_LINEAR_GRADIENT,
RSVG_NODE_TYPE_MARKER,
RSVG_NODE_TYPE_MASK,
RSVG_NODE_TYPE_PATH,
RSVG_NODE_TYPE_PATTERN,
RSVG_NODE_TYPE_POLYGON,
RSVG_NODE_TYPE_POLYLINE,
RSVG_NODE_TYPE_RADIAL_GRADIENT,
RSVG_NODE_TYPE_RECT,
RSVG_NODE_TYPE_STOP,
RSVG_NODE_TYPE_SVG,
RSVG_NODE_TYPE_SWITCH,
RSVG_NODE_TYPE_SYMBOL,
RSVG_NODE_TYPE_TEXT,
RSVG_NODE_TYPE_TREF,
RSVG_NODE_TYPE_TSPAN,
RSVG_NODE_TYPE_USE,
/* Filter primitives */
RSVG_NODE_TYPE_FILTER_PRIMITIVE = 64,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_BLEND,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_COLOR_MATRIX,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_COMPONENT_TRANSFER,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_COMPOSITE,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_CONVOLVE_MATRIX,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_DIFFUSE_LIGHTING,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_DISPLACEMENT_MAP,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_ERODE,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_FLOOD,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_GAUSSIAN_BLUR,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_IMAGE,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_MERGE,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_MERGE_NODE,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_OFFSET,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_SPECULAR_LIGHTING,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_TILE,
RSVG_NODE_TYPE_FILTER_PRIMITIVE_TURBULENCE,
} RsvgNodeType;
struct _RsvgNode {
RsvgState *state;
RsvgNode *parent;
GPtrArray *children;
RsvgNodeType type;
const char *name; /* owned by the xmlContext, invalid after parsing! */
void (*free) (RsvgNode * self);
void (*draw) (RsvgNode * self, RsvgDrawingCtx * ctx, int dominate);
void (*set_atts) (RsvgNode * self, RsvgHandle * ctx, RsvgPropertyBag *);
};
#define RSVG_NODE_TYPE(node) ((node)->type)
#define RSVG_NODE_IS_FILTER_PRIMITIVE(node) (RSVG_NODE_TYPE((node)) & RSVG_NODE_TYPE_FILTER_PRIMITIVE)
struct _RsvgNodeChars {
RsvgNode super;
GString *contents;
};
typedef void (*RsvgPropertyBagEnumFunc) (const char *key, const char *value, gpointer user_data);
G_GNUC_INTERNAL
RsvgPropertyBag *rsvg_property_bag_new (const char **atts);
G_GNUC_INTERNAL
RsvgPropertyBag *rsvg_property_bag_dup (RsvgPropertyBag * bag);
G_GNUC_INTERNAL
void rsvg_property_bag_free (RsvgPropertyBag * bag);
G_GNUC_INTERNAL
const char *rsvg_property_bag_lookup (RsvgPropertyBag * bag, const char *key);
G_GNUC_INTERNAL
guint rsvg_property_bag_size (RsvgPropertyBag * bag);
G_GNUC_INTERNAL
void rsvg_property_bag_enumerate (RsvgPropertyBag * bag, RsvgPropertyBagEnumFunc func,
gpointer user_data);
/* for some reason this one's public... */
GdkPixbuf *rsvg_pixbuf_from_data_with_size_data (const guchar * buff,
size_t len,
gpointer data,
const char *base_uri, GError ** error);
G_GNUC_INTERNAL
gboolean rsvg_eval_switch_attributes (RsvgPropertyBag * atts, gboolean * p_has_cond);
G_GNUC_INTERNAL
gchar *rsvg_get_base_uri_from_filename (const gchar * file_name);
G_GNUC_INTERNAL
void rsvg_pop_discrete_layer (RsvgDrawingCtx * ctx);
G_GNUC_INTERNAL
void rsvg_push_discrete_layer (RsvgDrawingCtx * ctx);
G_GNUC_INTERNAL
RsvgNode *rsvg_acquire_node (RsvgDrawingCtx * ctx, const char *url);
G_GNUC_INTERNAL
void rsvg_release_node (RsvgDrawingCtx * ctx, RsvgNode *node);
G_GNUC_INTERNAL
void rsvg_render_path (RsvgDrawingCtx * ctx, const cairo_path_t *path);
G_GNUC_INTERNAL
void rsvg_render_surface (RsvgDrawingCtx * ctx, cairo_surface_t *surface,
double x, double y, double w, double h);
G_GNUC_INTERNAL
void rsvg_render_free (RsvgRender * render);
G_GNUC_INTERNAL
void rsvg_add_clipping_rect (RsvgDrawingCtx * ctx, double x, double y, double w, double h);
G_GNUC_INTERNAL
cairo_surface_t *rsvg_cairo_surface_from_pixbuf (const GdkPixbuf *pixbuf);
G_GNUC_INTERNAL
GdkPixbuf *rsvg_cairo_surface_to_pixbuf (cairo_surface_t *surface);
G_GNUC_INTERNAL
cairo_surface_t *rsvg_get_surface_of_node (RsvgDrawingCtx * ctx, RsvgNode * drawable, double w, double h);
G_GNUC_INTERNAL
void rsvg_node_set_atts (RsvgNode * node, RsvgHandle * ctx, RsvgPropertyBag * atts);
G_GNUC_INTERNAL
void rsvg_drawing_ctx_free (RsvgDrawingCtx * handle);
G_GNUC_INTERNAL
void rsvg_bbox_init (RsvgBbox * self, cairo_matrix_t *matrix);
G_GNUC_INTERNAL
void rsvg_bbox_insert (RsvgBbox * dst, RsvgBbox * src);
G_GNUC_INTERNAL
void rsvg_bbox_clip (RsvgBbox * dst, RsvgBbox * src);
G_GNUC_INTERNAL
double _rsvg_css_normalize_length (const RsvgLength * in, RsvgDrawingCtx * ctx, char dir);
G_GNUC_INTERNAL
double _rsvg_css_hand_normalize_length (const RsvgLength * in, gdouble pixels_per_inch,
gdouble width_or_height, gdouble font_size);
double _rsvg_css_normalize_font_size (RsvgState * state, RsvgDrawingCtx * ctx);
G_GNUC_INTERNAL
double _rsvg_css_accumulate_baseline_shift (RsvgState * state, RsvgDrawingCtx * ctx);
G_GNUC_INTERNAL
RsvgLength _rsvg_css_parse_length (const char *str);
G_GNUC_INTERNAL
void _rsvg_push_view_box (RsvgDrawingCtx * ctx, double w, double h);
G_GNUC_INTERNAL
void _rsvg_pop_view_box (RsvgDrawingCtx * ctx);
G_GNUC_INTERNAL
void rsvg_SAX_handler_struct_init (void);
G_GNUC_INTERNAL
char *rsvg_get_url_string (const char *str);
G_GNUC_INTERNAL
void rsvg_return_if_fail_warning (const char *pretty_function,
const char *expression, GError ** error);
G_GNUC_INTERNAL
char *_rsvg_handle_acquire_data (RsvgHandle *handle,
const char *uri,
char **content_type,
gsize *len,
GError **error);
G_GNUC_INTERNAL
GInputStream *_rsvg_handle_acquire_stream (RsvgHandle *handle,
const char *uri,
char **content_type,
GError **error);
#define rsvg_return_if_fail(expr, error) G_STMT_START{ \
if G_LIKELY(expr) { } else \
{ \
rsvg_return_if_fail_warning (G_STRFUNC, \
#expr, error); \
return; \
}; }G_STMT_END
#define rsvg_return_val_if_fail(expr,val,error) G_STMT_START{ \
if G_LIKELY(expr) { } else \
{ \
rsvg_return_if_fail_warning (G_STRFUNC, \
#expr, error); \
return (val); \
}; }G_STMT_END
G_END_DECLS
#endif
|