src/svgtiny_internal.h

   1 /*
   2  * This file is part of Libsvgtiny
   3  * Licensed under the MIT License,
   4  *                http://opensource.org/licenses/mit-license.php
   5  * Copyright 2008 James Bursa <james@semichrome.net>
   6  */
   7
   8 #ifndef SVGTINY_INTERNAL_H
   9 #define SVGTINY_INTERNAL_H
  10
  11 #include <stdbool.h>
  12
  13 #include <dom/dom.h>
  14 #include <libcss/libcss.h>
  15
  16 #ifndef UNUSED
  17 #define UNUSED(x) ((void) (x))
  18 #endif
  19
  20 struct svgtiny_gradient_stop {
  21         float offset;
  22         svgtiny_colour color;
  23 };
  24
  25 #define svgtiny_MAX_STOPS 10
  26 #define svgtiny_LINEAR_GRADIENT 0x2000000
  27
  28 struct svgtiny_parse_state_gradient {
  29         unsigned int linear_gradient_stop_count;
  30         dom_string *gradient_x1, *gradient_y1, *gradient_x2, *gradient_y2;
  31         struct svgtiny_gradient_stop gradient_stop[svgtiny_MAX_STOPS];
  32         bool gradient_user_space_on_use;
  33         struct {
  34                 float a, b, c, d, e, f;
  35         } gradient_transform;
  36 };
  37
  38 struct svgtiny_parse_state {
  39         struct svgtiny_diagram *diagram;
  40         dom_document *document;
  41
  42         float viewport_width;
  43         float viewport_height;
  44
  45         /* current transformation matrix */
  46         struct {
  47                 float a, b, c, d, e, f;
  48         } ctm;
  49
  50         /* A libcss context to hold any stylesheets that are present
  51          * in the SVG document. This should be pre-populated rather
  52          * than on-the-fly, because, for example, a <style> sheet at
  53          * the end of the document should affect the SVG elements that
  54          * precede it. */
  55         css_select_ctx *select_ctx;
  56
  57         /* A libcss unit context. This is used to compute and compose
  58          * styles, and is convenient to create once and pass along
  59          * with the rest of the state. */
  60         css_unit_ctx unit_ctx;
  61
  62         /* Keep track of the parent element's computed style so that
  63          * we can compose its children's computed styles with it. */
  64         css_computed_style *parent_style;
  65
  66         /* paint attributes */
  67         svgtiny_colour fill;
  68         svgtiny_colour stroke;
  69         int stroke_width;
  70
  71         /* alpha */
  72         float fill_opacity;
  73         float stroke_opacity;
  74
  75         /* gradients */
  76         struct svgtiny_parse_state_gradient fill_grad;
  77         struct svgtiny_parse_state_gradient stroke_grad;
  78
  79         /* Interned strings */
  80 #define SVGTINY_STRING_ACTION2(n,nn) dom_string *interned_##n;
  81 #include "svgtiny_strings.h"
  82 #undef SVGTINY_STRING_ACTION2
  83
  84         /* Where we store the interned copy of the SVG XML namespace,
  85          *
  86          *   http://www.w3.org/2000/svg
  87          *
  88          * We handle it separately it has a different type
  89          * (lwc_string) than those above (dom_string).
  90          */
  91         lwc_string *interned_svg_xmlns;
  92 };
  93
  94 struct svgtiny_list;
  95
  96 /* svgtiny.c */
  97 float svgtiny_parse_length(dom_string *s, int viewport_size,
  98                 const struct svgtiny_parse_state state);
  99 void svgtiny_parse_color(dom_string *s, svgtiny_colour *c,
 100                 struct svgtiny_parse_state_gradient *grad,
 101                 struct svgtiny_parse_state *state);
 102 void svgtiny_parse_transform(char *s, float *ma, float *mb,
 103                 float *mc, float *md, float *me, float *mf);
 104 struct svgtiny_shape *svgtiny_add_shape(struct svgtiny_parse_state *state);
 105 void svgtiny_transform_path(float *p, unsigned int n,
 106                 struct svgtiny_parse_state *state);
 107 #if (defined(_GNU_SOURCE) && !defined(__APPLE__) || defined(__amigaos4__) || defined(__HAIKU__) || (defined(_POSIX_C_SOURCE) && ((_POSIX_C_SOURCE - 0) >= 200809L)))
 108 #define HAVE_STRNDUP
 109 #else
 110 #undef HAVE_STRNDUP
 111 char *svgtiny_strndup(const char *s, size_t n);
 112 #define strndup svgtiny_strndup
 113 #endif
 114
 115 /* svgtiny_css.c */
 116 css_error svgtiny_create_stylesheet(css_stylesheet **sheet,
 117                 bool inline_style);
 118 css_error svgtiny_select_style(struct svgtiny_parse_state *state,
 119                         dom_element *node,
 120                         const css_stylesheet *inline_sheet,
 121                         css_select_results **result);
 122
 123 /* svgtiny_gradient.c */
 124 void svgtiny_find_gradient(const char *id,
 125                 struct svgtiny_parse_state_gradient *grad,
 126                 struct svgtiny_parse_state *state);
 127 svgtiny_code svgtiny_add_path_linear_gradient(float *p, unsigned int n,
 128                 struct svgtiny_parse_state *state);
 129
 130 /* svgtiny_list.c */
 131 struct svgtiny_list *svgtiny_list_create(size_t item_size);
 132 unsigned int svgtiny_list_size(struct svgtiny_list *list);
 133 svgtiny_code svgtiny_list_resize(struct svgtiny_list *list,
 134                 unsigned int new_size);
 135 void *svgtiny_list_get(struct svgtiny_list *list,
 136                 unsigned int i);
 137 void *svgtiny_list_push(struct svgtiny_list *list);
 138 void svgtiny_list_free(struct svgtiny_list *list);
 139
 140 #endif