1 | /* |
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2 | rsvg.c: SAX-based renderer for SVG files into a GdkPixbuf. |
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3 | |
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4 | Copyright (C) 2000 Eazel, Inc. |
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5 | |
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6 | This program is free software; you can redistribute it and/or |
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7 | modify it under the terms of the GNU Library General Public License as |
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8 | published by the Free Software Foundation; either version 2 of the |
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9 | License, or (at your option) any later version. |
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10 | |
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11 | This program is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 | Library General Public License for more details. |
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15 | |
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16 | You should have received a copy of the GNU Library General Public |
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17 | License along with this program; if not, write to the |
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18 | Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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19 | Boston, MA 02111-1307, USA. |
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20 | |
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21 | Author: Raph Levien <raph@artofcode.com> |
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22 | */ |
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23 | |
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24 | #include "config.h" |
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25 | #include "rsvg.h" |
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26 | |
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27 | #include <math.h> |
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28 | #include <string.h> |
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29 | #include <stdarg.h> |
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30 | |
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31 | #include <libart_lgpl/art_affine.h> |
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32 | #include <libart_lgpl/art_vpath_bpath.h> |
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33 | #include <libart_lgpl/art_svp_vpath_stroke.h> |
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34 | #include <libart_lgpl/art_svp_vpath.h> |
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35 | #include <libart_lgpl/art_svp_intersect.h> |
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36 | #include <libart_lgpl/art_render_mask.h> |
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37 | #include <libart_lgpl/art_render_svp.h> |
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38 | #include <libart_lgpl/art_rgba.h> |
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39 | |
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40 | #include <libxml/SAX.h> |
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41 | #include <libxml/xmlmemory.h> |
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42 | |
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43 | #include <pango/pangoft2.h> |
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44 | |
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45 | #include "rsvg-bpath-util.h" |
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46 | #include "rsvg-path.h" |
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47 | #include "rsvg-css.h" |
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48 | #include "rsvg-paint-server.h" |
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49 | |
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50 | #define noVERBOSE |
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51 | |
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52 | #define SVG_BUFFER_SIZE (1024 * 8) |
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53 | |
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54 | typedef struct { |
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55 | double affine[6]; |
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56 | |
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57 | gint opacity; /* 0..255 */ |
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58 | |
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59 | RsvgPaintServer *fill; |
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60 | gint fill_opacity; /* 0..255 */ |
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61 | |
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62 | RsvgPaintServer *stroke; |
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63 | gint stroke_opacity; /* 0..255 */ |
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64 | double stroke_width; |
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65 | |
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66 | ArtPathStrokeCapType cap; |
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67 | ArtPathStrokeJoinType join; |
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68 | |
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69 | double font_size; |
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70 | char *font_family; |
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71 | |
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72 | guint32 stop_color; /* rgb */ |
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73 | gint stop_opacity; /* 0..255 */ |
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74 | |
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75 | gboolean in_defs; |
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76 | |
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77 | GdkPixbuf *save_pixbuf; |
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78 | } RsvgState; |
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79 | |
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80 | typedef struct RsvgSaxHandler RsvgSaxHandler; |
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81 | |
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82 | struct RsvgSaxHandler { |
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83 | void (*free) (RsvgSaxHandler *self); |
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84 | void (*start_element) (RsvgSaxHandler *self, const xmlChar *name, const xmlChar **atts); |
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85 | void (*end_element) (RsvgSaxHandler *self, const xmlChar *name); |
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86 | void (*characters) (RsvgSaxHandler *self, const xmlChar *ch, int len); |
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87 | }; |
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88 | |
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89 | struct RsvgHandle { |
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90 | RsvgSizeFunc size_func; |
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91 | gpointer user_data; |
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92 | GDestroyNotify user_data_destroy; |
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93 | GdkPixbuf *pixbuf; |
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94 | |
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95 | /* stack; there is a state for each element */ |
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96 | RsvgState *state; |
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97 | int n_state; |
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98 | int n_state_max; |
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99 | |
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100 | RsvgDefs *defs; |
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101 | |
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102 | RsvgSaxHandler *handler; /* should this be a handler stack? */ |
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103 | int handler_nest; |
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104 | |
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105 | GHashTable *entities; /* g_malloc'd string -> xmlEntityPtr */ |
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106 | |
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107 | PangoContext *pango_context; |
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108 | xmlParserCtxtPtr ctxt; |
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109 | GError **error; |
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110 | }; |
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111 | |
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112 | static void |
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113 | rsvg_state_init (RsvgState *state) |
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114 | { |
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115 | memset (state, 0, sizeof (*state)); |
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116 | |
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117 | art_affine_identity (state->affine); |
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118 | |
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119 | state->opacity = 0xff; |
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120 | state->fill = rsvg_paint_server_parse (NULL, "#000"); |
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121 | state->fill_opacity = 0xff; |
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122 | state->stroke_opacity = 0xff; |
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123 | state->stroke_width = 1; |
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124 | state->cap = ART_PATH_STROKE_CAP_BUTT; |
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125 | state->join = ART_PATH_STROKE_JOIN_MITER; |
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126 | state->stop_opacity = 0xff; |
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127 | } |
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128 | |
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129 | static void |
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130 | rsvg_state_clone (RsvgState *dst, const RsvgState *src) |
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131 | { |
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132 | *dst = *src; |
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133 | dst->font_family = g_strdup (src->font_family); |
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134 | rsvg_paint_server_ref (dst->fill); |
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135 | rsvg_paint_server_ref (dst->stroke); |
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136 | dst->save_pixbuf = NULL; |
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137 | } |
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138 | |
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139 | static void |
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140 | rsvg_state_finalize (RsvgState *state) |
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141 | { |
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142 | g_free (state->font_family); |
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143 | rsvg_paint_server_unref (state->fill); |
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144 | rsvg_paint_server_unref (state->stroke); |
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145 | } |
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146 | |
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147 | static void |
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148 | rsvg_ctx_free_helper (gpointer key, gpointer value, gpointer user_data) |
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149 | { |
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150 | xmlEntityPtr entval = (xmlEntityPtr)value; |
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151 | |
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152 | /* key == entval->name, so it's implicitly freed below */ |
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153 | |
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154 | g_free ((char *) entval->name); |
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155 | g_free ((char *) entval->ExternalID); |
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156 | g_free ((char *) entval->SystemID); |
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157 | xmlFree (entval->content); |
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158 | xmlFree (entval->orig); |
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159 | g_free (entval); |
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160 | } |
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161 | |
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162 | static void |
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163 | rsvg_pixmap_destroy (guchar *pixels, gpointer data) |
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164 | { |
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165 | g_free (pixels); |
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166 | } |
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167 | |
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168 | static void |
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169 | rsvg_start_svg (RsvgHandle *ctx, const xmlChar **atts) |
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170 | { |
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171 | int i; |
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172 | int width = -1, height = -1; |
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173 | int rowstride; |
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174 | art_u8 *pixels; |
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175 | gint fixed; |
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176 | RsvgState *state; |
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177 | gboolean has_alpha = 1; |
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178 | gint new_width, new_height; |
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179 | double x_zoom; |
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180 | double y_zoom; |
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181 | |
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182 | if (atts != NULL) |
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183 | { |
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184 | for (i = 0; atts[i] != NULL; i += 2) |
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185 | { |
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186 | if (!strcmp ((char *)atts[i], "width")) |
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187 | width = rsvg_css_parse_length ((char *)atts[i + 1], &fixed); |
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188 | else if (!strcmp ((char *)atts[i], "height")) |
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189 | height = rsvg_css_parse_length ((char *)atts[i + 1], &fixed); |
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190 | } |
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191 | |
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192 | #ifdef VERBOSE |
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193 | fprintf (stdout, "rsvg_start_svg: width = %d, height = %d\n", |
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194 | width, height); |
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195 | #endif |
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196 | |
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197 | if (width == 0 || height == 0) |
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198 | { |
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199 | /* FIXME: GError here? */ |
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200 | g_warning ("rsvg_start_svg: can't render 0-sized SVG"); |
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201 | return; |
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202 | } |
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203 | |
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204 | new_width = width; |
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205 | new_height = height; |
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206 | if (ctx->size_func) |
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207 | (* ctx->size_func) (&new_width, &new_height, ctx->user_data); |
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208 | |
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209 | if (new_width == 0 || new_height == 0) |
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210 | { |
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211 | /* FIXME: GError here? */ |
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212 | g_warning ("rsvg_start_svg: can't render 0-sized SVG"); |
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213 | return; |
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214 | } |
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215 | |
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216 | x_zoom = (width < 0 || new_width < 0) ? 1 : (double) new_width / width; |
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217 | y_zoom = (height < 0 || new_height < 0) ? 1 : (double) new_height / height; |
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218 | |
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219 | /* Scale size of target pixbuf */ |
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220 | state = &ctx->state[ctx->n_state - 1]; |
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221 | art_affine_scale (state->affine, x_zoom, y_zoom); |
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222 | |
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223 | if (new_width < 0 || new_height < 0) |
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224 | { |
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225 | g_warning ("rsvg_start_svg: width and height not specified in the SVG, nor supplied by the size callback"); |
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226 | if (new_width < 0) new_width = 500; |
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227 | if (new_height < 0) new_height = 500; |
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228 | } |
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229 | |
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230 | if (new_width >= INT_MAX / 4) |
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231 | { |
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232 | /* FIXME: GError here? */ |
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233 | g_warning ("rsvg_start_svg: width too large"); |
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234 | return; |
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235 | } |
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236 | rowstride = (new_width * (has_alpha ? 4 : 3) + 3) & ~3; |
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237 | if (rowstride > INT_MAX / new_height) |
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238 | { |
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239 | /* FIXME: GError here? */ |
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240 | g_warning ("rsvg_start_svg: width too large"); |
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241 | return; |
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242 | } |
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243 | |
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244 | /* FIXME: Add GError here if size is too big. */ |
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245 | |
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246 | pixels = g_try_malloc (rowstride * new_height); |
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247 | if (pixels == NULL) |
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248 | { |
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249 | /* FIXME: GError here? */ |
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250 | g_warning ("rsvg_start_svg: dimensions too large"); |
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251 | return; |
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252 | } |
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253 | memset (pixels, has_alpha ? 0 : 255, rowstride * new_height); |
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254 | ctx->pixbuf = gdk_pixbuf_new_from_data (pixels, |
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255 | GDK_COLORSPACE_RGB, |
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256 | has_alpha, 8, |
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257 | new_width, new_height, |
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258 | rowstride, |
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259 | rsvg_pixmap_destroy, |
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260 | NULL); |
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261 | } |
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262 | } |
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263 | |
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264 | /* Parse a CSS2 style argument, setting the SVG context attributes. */ |
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265 | static void |
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266 | rsvg_parse_style_arg (RsvgHandle *ctx, RsvgState *state, const char *str) |
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267 | { |
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268 | int arg_off; |
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269 | |
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270 | arg_off = rsvg_css_param_arg_offset (str); |
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271 | if (rsvg_css_param_match (str, "opacity")) |
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272 | { |
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273 | state->opacity = rsvg_css_parse_opacity (str + arg_off); |
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274 | } |
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275 | else if (rsvg_css_param_match (str, "fill")) |
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276 | { |
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277 | rsvg_paint_server_unref (state->fill); |
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278 | state->fill = rsvg_paint_server_parse (ctx->defs, str + arg_off); |
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279 | } |
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280 | else if (rsvg_css_param_match (str, "fill-opacity")) |
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281 | { |
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282 | state->fill_opacity = rsvg_css_parse_opacity (str + arg_off); |
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283 | } |
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284 | else if (rsvg_css_param_match (str, "stroke")) |
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285 | { |
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286 | rsvg_paint_server_unref (state->stroke); |
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287 | state->stroke = rsvg_paint_server_parse (ctx->defs, str + arg_off); |
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288 | } |
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289 | else if (rsvg_css_param_match (str, "stroke-width")) |
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290 | { |
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291 | int fixed; |
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292 | state->stroke_width = rsvg_css_parse_length (str + arg_off, &fixed); |
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293 | } |
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294 | else if (rsvg_css_param_match (str, "stroke-linecap")) |
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295 | { |
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296 | if (!strcmp (str + arg_off, "butt")) |
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297 | state->cap = ART_PATH_STROKE_CAP_BUTT; |
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298 | else if (!strcmp (str + arg_off, "round")) |
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299 | state->cap = ART_PATH_STROKE_CAP_ROUND; |
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300 | else if (!strcmp (str + arg_off, "square")) |
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301 | state->cap = ART_PATH_STROKE_CAP_SQUARE; |
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302 | else |
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303 | g_warning ("unknown line cap style %s", str + arg_off); |
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304 | } |
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305 | else if (rsvg_css_param_match (str, "stroke-opacity")) |
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306 | { |
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307 | state->stroke_opacity = rsvg_css_parse_opacity (str + arg_off); |
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308 | } |
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309 | else if (rsvg_css_param_match (str, "stroke-linejoin")) |
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310 | { |
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311 | if (!strcmp (str + arg_off, "miter")) |
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312 | state->join = ART_PATH_STROKE_JOIN_MITER; |
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313 | else if (!strcmp (str + arg_off, "round")) |
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314 | state->join = ART_PATH_STROKE_JOIN_ROUND; |
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315 | else if (!strcmp (str + arg_off, "bevel")) |
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316 | state->join = ART_PATH_STROKE_JOIN_BEVEL; |
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317 | else |
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318 | g_warning ("unknown line join style %s", str + arg_off); |
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319 | } |
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320 | else if (rsvg_css_param_match (str, "font-size")) |
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321 | { |
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322 | state->font_size = rsvg_css_parse_fontsize (str + arg_off); |
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323 | } |
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324 | else if (rsvg_css_param_match (str, "font-family")) |
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325 | { |
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326 | g_free (state->font_family); |
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327 | state->font_family = g_strdup (str + arg_off); |
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328 | } |
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329 | else if (rsvg_css_param_match (str, "stop-color")) |
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330 | { |
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331 | state->stop_color = rsvg_css_parse_color (str + arg_off); |
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332 | } |
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333 | else if (rsvg_css_param_match (str, "stop-opacity")) |
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334 | { |
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335 | state->stop_opacity = rsvg_css_parse_opacity (str + arg_off); |
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336 | } |
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337 | } |
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338 | |
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339 | /* Split a CSS2 style into individual style arguments, setting attributes |
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340 | in the SVG context. |
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341 | |
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342 | It's known that this is _way_ out of spec. A more complete CSS2 |
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343 | implementation will happen later. |
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344 | */ |
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345 | static void |
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346 | rsvg_parse_style (RsvgHandle *ctx, RsvgState *state, const char *str) |
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347 | { |
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348 | int start, end; |
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349 | char *arg; |
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350 | |
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351 | start = 0; |
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352 | while (str[start] != '\0') |
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353 | { |
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354 | for (end = start; str[end] != '\0' && str[end] != ';'; end++); |
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355 | arg = g_new (char, 1 + end - start); |
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356 | memcpy (arg, str + start, end - start); |
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357 | arg[end - start] = '\0'; |
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358 | rsvg_parse_style_arg (ctx, state, arg); |
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359 | g_free (arg); |
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360 | start = end; |
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361 | if (str[start] == ';') start++; |
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362 | while (str[start] == ' ') start++; |
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363 | } |
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364 | } |
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365 | |
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366 | /* Parse an SVG transform string into an affine matrix. Reference: SVG |
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367 | working draft dated 1999-07-06, section 8.5. Return TRUE on |
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368 | success. */ |
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369 | static gboolean |
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370 | rsvg_parse_transform (double dst[6], const char *src) |
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371 | { |
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372 | int idx; |
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373 | char keyword[32]; |
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374 | double args[6]; |
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375 | int n_args; |
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376 | guint key_len; |
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377 | double tmp_affine[6]; |
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378 | |
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379 | art_affine_identity (dst); |
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380 | |
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381 | idx = 0; |
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382 | while (src[idx]) |
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383 | { |
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384 | /* skip initial whitespace */ |
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385 | while (g_ascii_isspace (src[idx])) |
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386 | idx++; |
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387 | |
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388 | /* parse keyword */ |
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389 | for (key_len = 0; key_len < sizeof (keyword); key_len++) |
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390 | { |
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391 | char c; |
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392 | |
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393 | c = src[idx]; |
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394 | if (g_ascii_isalpha (c) || c == '-') |
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395 | keyword[key_len] = src[idx++]; |
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396 | else |
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397 | break; |
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398 | } |
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399 | if (key_len >= sizeof (keyword)) |
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400 | return FALSE; |
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401 | keyword[key_len] = '\0'; |
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402 | |
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403 | /* skip whitespace */ |
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404 | while (g_ascii_isspace (src[idx])) |
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405 | idx++; |
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406 | |
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407 | if (src[idx] != '(') |
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408 | return FALSE; |
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409 | idx++; |
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410 | |
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411 | for (n_args = 0; ; n_args++) |
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412 | { |
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413 | char c; |
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414 | char *end_ptr; |
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415 | |
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416 | /* skip whitespace */ |
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417 | while (g_ascii_isspace (src[idx])) |
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418 | idx++; |
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419 | c = src[idx]; |
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420 | if (g_ascii_isdigit (c) || c == '+' || c == '-' || c == '.') |
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421 | { |
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422 | if (n_args == sizeof(args) / sizeof(args[0])) |
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423 | return FALSE; /* too many args */ |
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424 | args[n_args] = strtod (src + idx, &end_ptr); |
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425 | idx = end_ptr - src; |
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426 | |
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427 | while (g_ascii_isspace (src[idx])) |
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428 | idx++; |
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429 | |
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430 | /* skip optional comma */ |
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431 | if (src[idx] == ',') |
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432 | idx++; |
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433 | } |
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434 | else if (c == ')') |
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435 | break; |
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436 | else |
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437 | return FALSE; |
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438 | } |
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439 | idx++; |
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440 | |
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441 | /* ok, have parsed keyword and args, now modify the transform */ |
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442 | if (!strcmp (keyword, "matrix")) |
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443 | { |
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444 | if (n_args != 6) |
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445 | return FALSE; |
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446 | art_affine_multiply (dst, args, dst); |
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447 | } |
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448 | else if (!strcmp (keyword, "translate")) |
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449 | { |
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450 | if (n_args == 1) |
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451 | args[1] = 0; |
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452 | else if (n_args != 2) |
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453 | return FALSE; |
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454 | art_affine_translate (tmp_affine, args[0], args[1]); |
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455 | art_affine_multiply (dst, tmp_affine, dst); |
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456 | } |
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457 | else if (!strcmp (keyword, "scale")) |
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458 | { |
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459 | if (n_args == 1) |
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460 | args[1] = args[0]; |
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461 | else if (n_args != 2) |
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462 | return FALSE; |
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463 | art_affine_scale (tmp_affine, args[0], args[1]); |
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464 | art_affine_multiply (dst, tmp_affine, dst); |
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465 | } |
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466 | else if (!strcmp (keyword, "rotate")) |
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467 | { |
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468 | if (n_args != 1) |
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469 | return FALSE; |
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470 | art_affine_rotate (tmp_affine, args[0]); |
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471 | art_affine_multiply (dst, tmp_affine, dst); |
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472 | } |
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473 | else if (!strcmp (keyword, "skewX")) |
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474 | { |
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475 | if (n_args != 1) |
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476 | return FALSE; |
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477 | art_affine_shear (tmp_affine, args[0]); |
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478 | art_affine_multiply (dst, tmp_affine, dst); |
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479 | } |
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480 | else if (!strcmp (keyword, "skewY")) |
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481 | { |
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482 | if (n_args != 1) |
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483 | return FALSE; |
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484 | art_affine_shear (tmp_affine, args[0]); |
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485 | /* transpose the affine, given that we know [1] is zero */ |
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486 | tmp_affine[1] = tmp_affine[2]; |
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487 | tmp_affine[2] = 0; |
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488 | art_affine_multiply (dst, tmp_affine, dst); |
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489 | } |
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490 | else |
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491 | return FALSE; /* unknown keyword */ |
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492 | } |
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493 | return TRUE; |
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494 | } |
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495 | |
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496 | /** |
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497 | * rsvg_parse_transform_attr: Parse transform attribute and apply to state. |
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498 | * @ctx: Rsvg context. |
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499 | * @state: State in which to apply the transform. |
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500 | * @str: String containing transform. |
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501 | * |
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502 | * Parses the transform attribute in @str and applies it to @state. |
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503 | **/ |
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504 | static void |
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505 | rsvg_parse_transform_attr (RsvgHandle *ctx, RsvgState *state, const char *str) |
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506 | { |
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507 | double affine[6]; |
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508 | |
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509 | if (rsvg_parse_transform (affine, str)) |
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510 | { |
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511 | art_affine_multiply (state->affine, affine, state->affine); |
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512 | } |
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513 | else |
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514 | { |
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515 | /* parse error for transform attribute. todo: report */ |
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516 | } |
---|
517 | } |
---|
518 | |
---|
519 | /** |
---|
520 | * rsvg_parse_style_attrs: Parse style attribute. |
---|
521 | * @ctx: Rsvg context. |
---|
522 | * @atts: Attributes in SAX style. |
---|
523 | * |
---|
524 | * Parses style and transform attributes and modifies state at top of |
---|
525 | * stack. |
---|
526 | **/ |
---|
527 | static void |
---|
528 | rsvg_parse_style_attrs (RsvgHandle *ctx, const xmlChar **atts) |
---|
529 | { |
---|
530 | int i; |
---|
531 | |
---|
532 | if (atts != NULL) |
---|
533 | { |
---|
534 | for (i = 0; atts[i] != NULL; i += 2) |
---|
535 | { |
---|
536 | if (!strcmp ((char *)atts[i], "style")) |
---|
537 | rsvg_parse_style (ctx, &ctx->state[ctx->n_state - 1], |
---|
538 | (char *)atts[i + 1]); |
---|
539 | else if (!strcmp ((char *)atts[i], "transform")) |
---|
540 | rsvg_parse_transform_attr (ctx, &ctx->state[ctx->n_state - 1], |
---|
541 | (char *)atts[i + 1]); |
---|
542 | } |
---|
543 | } |
---|
544 | } |
---|
545 | |
---|
546 | /** |
---|
547 | * rsvg_push_opacity_group: Begin a new transparency group. |
---|
548 | * @ctx: Context in which to push. |
---|
549 | * |
---|
550 | * Pushes a new transparency group onto the stack. The top of the stack |
---|
551 | * is stored in the context, while the "saved" value is in the state |
---|
552 | * stack. |
---|
553 | **/ |
---|
554 | static void |
---|
555 | rsvg_push_opacity_group (RsvgHandle *ctx) |
---|
556 | { |
---|
557 | RsvgState *state; |
---|
558 | GdkPixbuf *pixbuf; |
---|
559 | art_u8 *pixels; |
---|
560 | int width, height, rowstride; |
---|
561 | |
---|
562 | state = &ctx->state[ctx->n_state - 1]; |
---|
563 | pixbuf = ctx->pixbuf; |
---|
564 | |
---|
565 | state->save_pixbuf = pixbuf; |
---|
566 | |
---|
567 | if (pixbuf == NULL) |
---|
568 | { |
---|
569 | /* FIXME: What warning/GError here? */ |
---|
570 | return; |
---|
571 | } |
---|
572 | |
---|
573 | if (!gdk_pixbuf_get_has_alpha (pixbuf)) |
---|
574 | { |
---|
575 | g_warning ("push/pop transparency group on non-alpha buffer nyi"); |
---|
576 | return; |
---|
577 | } |
---|
578 | |
---|
579 | width = gdk_pixbuf_get_width (pixbuf); |
---|
580 | height = gdk_pixbuf_get_height (pixbuf); |
---|
581 | rowstride = gdk_pixbuf_get_rowstride (pixbuf); |
---|
582 | pixels = g_new (art_u8, rowstride * height); |
---|
583 | memset (pixels, 0, rowstride * height); |
---|
584 | |
---|
585 | pixbuf = gdk_pixbuf_new_from_data (pixels, |
---|
586 | GDK_COLORSPACE_RGB, |
---|
587 | TRUE, |
---|
588 | gdk_pixbuf_get_bits_per_sample (pixbuf), |
---|
589 | width, |
---|
590 | height, |
---|
591 | rowstride, |
---|
592 | rsvg_pixmap_destroy, |
---|
593 | NULL); |
---|
594 | ctx->pixbuf = pixbuf; |
---|
595 | } |
---|
596 | |
---|
597 | /** |
---|
598 | * rsvg_pop_opacity_group: End a transparency group. |
---|
599 | * @ctx: Context in which to push. |
---|
600 | * @opacity: Opacity for blending (0..255). |
---|
601 | * |
---|
602 | * Pops a new transparency group from the stack, recompositing with the |
---|
603 | * next on stack. |
---|
604 | **/ |
---|
605 | static void |
---|
606 | rsvg_pop_opacity_group (RsvgHandle *ctx, int opacity) |
---|
607 | { |
---|
608 | RsvgState *state = &ctx->state[ctx->n_state - 1]; |
---|
609 | GdkPixbuf *tos, *nos; |
---|
610 | art_u8 *tos_pixels, *nos_pixels; |
---|
611 | int width; |
---|
612 | int height; |
---|
613 | int rowstride; |
---|
614 | int x, y; |
---|
615 | int tmp; |
---|
616 | |
---|
617 | tos = ctx->pixbuf; |
---|
618 | nos = state->save_pixbuf; |
---|
619 | |
---|
620 | if (tos == NULL || nos == NULL) |
---|
621 | { |
---|
622 | /* FIXME: What warning/GError here? */ |
---|
623 | return; |
---|
624 | } |
---|
625 | |
---|
626 | if (!gdk_pixbuf_get_has_alpha (nos)) |
---|
627 | { |
---|
628 | g_warning ("push/pop transparency group on non-alpha buffer nyi"); |
---|
629 | return; |
---|
630 | } |
---|
631 | |
---|
632 | width = gdk_pixbuf_get_width (tos); |
---|
633 | height = gdk_pixbuf_get_height (tos); |
---|
634 | rowstride = gdk_pixbuf_get_rowstride (tos); |
---|
635 | |
---|
636 | tos_pixels = gdk_pixbuf_get_pixels (tos); |
---|
637 | nos_pixels = gdk_pixbuf_get_pixels (nos); |
---|
638 | |
---|
639 | for (y = 0; y < height; y++) |
---|
640 | { |
---|
641 | for (x = 0; x < width; x++) |
---|
642 | { |
---|
643 | art_u8 r, g, b, a; |
---|
644 | a = tos_pixels[4 * x + 3]; |
---|
645 | if (a) |
---|
646 | { |
---|
647 | r = tos_pixels[4 * x]; |
---|
648 | g = tos_pixels[4 * x + 1]; |
---|
649 | b = tos_pixels[4 * x + 2]; |
---|
650 | tmp = a * opacity + 0x80; |
---|
651 | a = (tmp + (tmp >> 8)) >> 8; |
---|
652 | art_rgba_run_alpha (nos_pixels + 4 * x, r, g, b, a, 1); |
---|
653 | } |
---|
654 | } |
---|
655 | tos_pixels += rowstride; |
---|
656 | nos_pixels += rowstride; |
---|
657 | } |
---|
658 | |
---|
659 | g_object_unref (tos); |
---|
660 | ctx->pixbuf = nos; |
---|
661 | } |
---|
662 | |
---|
663 | static void |
---|
664 | rsvg_start_g (RsvgHandle *ctx, const xmlChar **atts) |
---|
665 | { |
---|
666 | RsvgState *state = &ctx->state[ctx->n_state - 1]; |
---|
667 | |
---|
668 | rsvg_parse_style_attrs (ctx, atts); |
---|
669 | |
---|
670 | if (state->opacity != 0xff) |
---|
671 | rsvg_push_opacity_group (ctx); |
---|
672 | } |
---|
673 | |
---|
674 | static void |
---|
675 | rsvg_end_g (RsvgHandle *ctx) |
---|
676 | { |
---|
677 | RsvgState *state = &ctx->state[ctx->n_state - 1]; |
---|
678 | |
---|
679 | if (state->opacity != 0xff) |
---|
680 | rsvg_pop_opacity_group (ctx, state->opacity); |
---|
681 | } |
---|
682 | |
---|
683 | /** |
---|
684 | * rsvg_close_vpath: Close a vector path. |
---|
685 | * @src: Source vector path. |
---|
686 | * |
---|
687 | * Closes any open subpaths in the vector path. |
---|
688 | * |
---|
689 | * Return value: Closed vector path, allocated with g_new. |
---|
690 | **/ |
---|
691 | static ArtVpath * |
---|
692 | rsvg_close_vpath (const ArtVpath *src) |
---|
693 | { |
---|
694 | ArtVpath *result; |
---|
695 | int n_result, n_result_max; |
---|
696 | int src_ix; |
---|
697 | double beg_x, beg_y; |
---|
698 | gboolean open; |
---|
699 | |
---|
700 | n_result = 0; |
---|
701 | n_result_max = 16; |
---|
702 | result = g_new (ArtVpath, n_result_max); |
---|
703 | |
---|
704 | beg_x = 0; |
---|
705 | beg_y = 0; |
---|
706 | open = FALSE; |
---|
707 | |
---|
708 | for (src_ix = 0; src[src_ix].code != ART_END; src_ix++) |
---|
709 | { |
---|
710 | if (n_result == n_result_max) |
---|
711 | result = g_renew (ArtVpath, result, n_result_max <<= 1); |
---|
712 | result[n_result].code = src[src_ix].code == ART_MOVETO_OPEN ? |
---|
713 | ART_MOVETO : src[src_ix].code; |
---|
714 | result[n_result].x = src[src_ix].x; |
---|
715 | result[n_result].y = src[src_ix].y; |
---|
716 | n_result++; |
---|
717 | if (src[src_ix].code == ART_MOVETO_OPEN) |
---|
718 | { |
---|
719 | beg_x = src[src_ix].x; |
---|
720 | beg_y = src[src_ix].y; |
---|
721 | open = TRUE; |
---|
722 | } |
---|
723 | else if (src[src_ix + 1].code != ART_LINETO) |
---|
724 | { |
---|
725 | if (open && (beg_x != src[src_ix].x || beg_y != src[src_ix].y)) |
---|
726 | { |
---|
727 | if (n_result == n_result_max) |
---|
728 | result = g_renew (ArtVpath, result, n_result_max <<= 1); |
---|
729 | result[n_result].code = ART_LINETO; |
---|
730 | result[n_result].x = beg_x; |
---|
731 | result[n_result].y = beg_y; |
---|
732 | n_result++; |
---|
733 | } |
---|
734 | open = FALSE; |
---|
735 | } |
---|
736 | } |
---|
737 | if (n_result == n_result_max) |
---|
738 | result = g_renew (ArtVpath, result, n_result_max <<= 1); |
---|
739 | result[n_result].code = ART_END; |
---|
740 | result[n_result].x = 0.0; |
---|
741 | result[n_result].y = 0.0; |
---|
742 | return result; |
---|
743 | } |
---|
744 | |
---|
745 | /** |
---|
746 | * rsvg_render_svp: Render an SVP. |
---|
747 | * @ctx: Context in which to render. |
---|
748 | * @svp: SVP to render. |
---|
749 | * @ps: Paint server for rendering. |
---|
750 | * @opacity: Opacity as 0..0xff. |
---|
751 | * |
---|
752 | * Renders the SVP over the pixbuf in @ctx. |
---|
753 | **/ |
---|
754 | static void |
---|
755 | rsvg_render_svp (RsvgHandle *ctx, const ArtSVP *svp, |
---|
756 | RsvgPaintServer *ps, int opacity) |
---|
757 | { |
---|
758 | GdkPixbuf *pixbuf; |
---|
759 | ArtRender *render; |
---|
760 | gboolean has_alpha; |
---|
761 | |
---|
762 | pixbuf = ctx->pixbuf; |
---|
763 | if (pixbuf == NULL) |
---|
764 | { |
---|
765 | /* FIXME: What warning/GError here? */ |
---|
766 | return; |
---|
767 | } |
---|
768 | |
---|
769 | has_alpha = gdk_pixbuf_get_has_alpha (pixbuf); |
---|
770 | |
---|
771 | render = art_render_new (0, 0, |
---|
772 | gdk_pixbuf_get_width (pixbuf), |
---|
773 | gdk_pixbuf_get_height (pixbuf), |
---|
774 | gdk_pixbuf_get_pixels (pixbuf), |
---|
775 | gdk_pixbuf_get_rowstride (pixbuf), |
---|
776 | gdk_pixbuf_get_n_channels (pixbuf) - |
---|
777 | (has_alpha ? 1 : 0), |
---|
778 | gdk_pixbuf_get_bits_per_sample (pixbuf), |
---|
779 | has_alpha ? ART_ALPHA_SEPARATE : ART_ALPHA_NONE, |
---|
780 | NULL); |
---|
781 | |
---|
782 | art_render_svp (render, svp); |
---|
783 | art_render_mask_solid (render, (opacity << 8) + opacity + (opacity >> 7)); |
---|
784 | rsvg_render_paint_server (render, ps, NULL); /* todo: paint server ctx */ |
---|
785 | art_render_invoke (render); |
---|
786 | } |
---|
787 | |
---|
788 | static void |
---|
789 | rsvg_render_bpath (RsvgHandle *ctx, const ArtBpath *bpath) |
---|
790 | { |
---|
791 | RsvgState *state; |
---|
792 | ArtBpath *affine_bpath; |
---|
793 | ArtVpath *vpath; |
---|
794 | ArtSVP *svp; |
---|
795 | GdkPixbuf *pixbuf; |
---|
796 | gboolean need_tmpbuf; |
---|
797 | int opacity; |
---|
798 | int tmp; |
---|
799 | |
---|
800 | pixbuf = ctx->pixbuf; |
---|
801 | if (pixbuf == NULL) |
---|
802 | { |
---|
803 | /* FIXME: What warning/GError here? */ |
---|
804 | return; |
---|
805 | } |
---|
806 | |
---|
807 | state = &ctx->state[ctx->n_state - 1]; |
---|
808 | affine_bpath = art_bpath_affine_transform (bpath, |
---|
809 | state->affine); |
---|
810 | |
---|
811 | vpath = art_bez_path_to_vec (affine_bpath, 0.25); |
---|
812 | art_free (affine_bpath); |
---|
813 | |
---|
814 | need_tmpbuf = (state->fill != NULL) && (state->stroke != NULL) && |
---|
815 | state->opacity != 0xff; |
---|
816 | |
---|
817 | if (need_tmpbuf) |
---|
818 | rsvg_push_opacity_group (ctx); |
---|
819 | |
---|
820 | if (state->fill != NULL) |
---|
821 | { |
---|
822 | ArtVpath *closed_vpath; |
---|
823 | ArtSVP *svp2; |
---|
824 | ArtSvpWriter *swr; |
---|
825 | |
---|
826 | closed_vpath = rsvg_close_vpath (vpath); |
---|
827 | svp = art_svp_from_vpath (closed_vpath); |
---|
828 | g_free (closed_vpath); |
---|
829 | |
---|
830 | swr = art_svp_writer_rewind_new (ART_WIND_RULE_NONZERO); |
---|
831 | art_svp_intersector (svp, swr); |
---|
832 | |
---|
833 | svp2 = art_svp_writer_rewind_reap (swr); |
---|
834 | art_svp_free (svp); |
---|
835 | |
---|
836 | opacity = state->fill_opacity; |
---|
837 | if (!need_tmpbuf && state->opacity != 0xff) |
---|
838 | { |
---|
839 | tmp = opacity * state->opacity + 0x80; |
---|
840 | opacity = (tmp + (tmp >> 8)) >> 8; |
---|
841 | } |
---|
842 | rsvg_render_svp (ctx, svp2, state->fill, opacity); |
---|
843 | art_svp_free (svp2); |
---|
844 | } |
---|
845 | |
---|
846 | if (state->stroke != NULL) |
---|
847 | { |
---|
848 | /* todo: libart doesn't yet implement anamorphic scaling of strokes */ |
---|
849 | double stroke_width = state->stroke_width * |
---|
850 | art_affine_expansion (state->affine); |
---|
851 | |
---|
852 | if (stroke_width < 0.25) |
---|
853 | stroke_width = 0.25; |
---|
854 | |
---|
855 | svp = art_svp_vpath_stroke (vpath, state->join, state->cap, |
---|
856 | stroke_width, 4, 0.25); |
---|
857 | opacity = state->stroke_opacity; |
---|
858 | if (!need_tmpbuf && state->opacity != 0xff) |
---|
859 | { |
---|
860 | tmp = opacity * state->opacity + 0x80; |
---|
861 | opacity = (tmp + (tmp >> 8)) >> 8; |
---|
862 | } |
---|
863 | rsvg_render_svp (ctx, svp, state->stroke, opacity); |
---|
864 | art_svp_free (svp); |
---|
865 | } |
---|
866 | |
---|
867 | if (need_tmpbuf) |
---|
868 | rsvg_pop_opacity_group (ctx, state->opacity); |
---|
869 | |
---|
870 | art_free (vpath); |
---|
871 | } |
---|
872 | |
---|
873 | static void |
---|
874 | rsvg_start_path (RsvgHandle *ctx, const xmlChar **atts) |
---|
875 | { |
---|
876 | int i; |
---|
877 | char *d = NULL; |
---|
878 | |
---|
879 | rsvg_parse_style_attrs (ctx, atts); |
---|
880 | if (atts != NULL) |
---|
881 | { |
---|
882 | for (i = 0; atts[i] != NULL; i += 2) |
---|
883 | { |
---|
884 | if (!strcmp ((char *)atts[i], "d")) |
---|
885 | d = (char *)atts[i + 1]; |
---|
886 | } |
---|
887 | } |
---|
888 | if (d != NULL) |
---|
889 | { |
---|
890 | RsvgBpathDef *bpath_def; |
---|
891 | |
---|
892 | bpath_def = rsvg_parse_path (d); |
---|
893 | rsvg_bpath_def_art_finish (bpath_def); |
---|
894 | |
---|
895 | rsvg_render_bpath (ctx, bpath_def->bpath); |
---|
896 | |
---|
897 | rsvg_bpath_def_free (bpath_def); |
---|
898 | } |
---|
899 | } |
---|
900 | |
---|
901 | /* begin text - this should likely get split into its own .c file */ |
---|
902 | |
---|
903 | typedef struct _RsvgSaxHandlerText RsvgSaxHandlerText; |
---|
904 | |
---|
905 | struct _RsvgSaxHandlerText { |
---|
906 | RsvgSaxHandler super; |
---|
907 | RsvgHandle *ctx; |
---|
908 | double xpos; |
---|
909 | double ypos; |
---|
910 | }; |
---|
911 | |
---|
912 | static void |
---|
913 | rsvg_text_handler_free (RsvgSaxHandler *self) |
---|
914 | { |
---|
915 | g_free (self); |
---|
916 | } |
---|
917 | |
---|
918 | static void |
---|
919 | rsvg_text_handler_characters (RsvgSaxHandler *self, const xmlChar *ch, int len) |
---|
920 | { |
---|
921 | RsvgSaxHandlerText *z = (RsvgSaxHandlerText *)self; |
---|
922 | RsvgHandle *ctx = z->ctx; |
---|
923 | char *string; |
---|
924 | int beg, end; |
---|
925 | RsvgState *state; |
---|
926 | ArtRender *render; |
---|
927 | GdkPixbuf *pixbuf; |
---|
928 | gboolean has_alpha; |
---|
929 | int opacity; |
---|
930 | PangoLayout *layout; |
---|
931 | PangoFontDescription *font; |
---|
932 | PangoLayoutLine *line; |
---|
933 | PangoRectangle ink_rect, line_ink_rect; |
---|
934 | FT_Bitmap bitmap; |
---|
935 | |
---|
936 | state = &ctx->state[ctx->n_state - 1]; |
---|
937 | if (state->fill == NULL && state->font_size <= 0) |
---|
938 | { |
---|
939 | return; |
---|
940 | } |
---|
941 | |
---|
942 | pixbuf = ctx->pixbuf; |
---|
943 | if (pixbuf == NULL) |
---|
944 | { |
---|
945 | /* FIXME: What warning/GError here? */ |
---|
946 | return; |
---|
947 | } |
---|
948 | |
---|
949 | /* Copy ch into string, chopping off leading and trailing whitespace */ |
---|
950 | for (beg = 0; beg < len; beg++) |
---|
951 | if (!g_ascii_isspace (ch[beg])) |
---|
952 | break; |
---|
953 | |
---|
954 | for (end = len; end > beg; end--) |
---|
955 | if (!g_ascii_isspace (ch[end - 1])) |
---|
956 | break; |
---|
957 | |
---|
958 | string = g_malloc (end - beg + 1); |
---|
959 | memcpy (string, ch + beg, end - beg); |
---|
960 | string[end - beg] = 0; |
---|
961 | |
---|
962 | #ifdef VERBOSE |
---|
963 | fprintf (stderr, "text characters(%s, %d)\n", string, len); |
---|
964 | #endif |
---|
965 | |
---|
966 | if (ctx->pango_context == NULL) |
---|
967 | ctx->pango_context = pango_ft2_get_context (72, 72); /* FIXME: dpi? */ |
---|
968 | |
---|
969 | has_alpha = gdk_pixbuf_get_has_alpha (pixbuf); |
---|
970 | |
---|
971 | render = art_render_new (0, 0, |
---|
972 | gdk_pixbuf_get_width (pixbuf), |
---|
973 | gdk_pixbuf_get_height (pixbuf), |
---|
974 | gdk_pixbuf_get_pixels (pixbuf), |
---|
975 | gdk_pixbuf_get_rowstride (pixbuf), |
---|
976 | gdk_pixbuf_get_n_channels (pixbuf) - |
---|
977 | (has_alpha ? 1 : 0), |
---|
978 | gdk_pixbuf_get_bits_per_sample (pixbuf), |
---|
979 | has_alpha ? ART_ALPHA_SEPARATE : ART_ALPHA_NONE, |
---|
980 | NULL); |
---|
981 | |
---|
982 | layout = pango_layout_new (ctx->pango_context); |
---|
983 | pango_layout_set_text (layout, string, -1); |
---|
984 | font = pango_font_description_copy (pango_context_get_font_description (ctx->pango_context)); |
---|
985 | if (state->font_family) |
---|
986 | pango_font_description_set_family_static (font, state->font_family); |
---|
987 | pango_font_description_set_size (font, state->font_size * PANGO_SCALE); |
---|
988 | pango_layout_set_font_description (layout, font); |
---|
989 | pango_font_description_free (font); |
---|
990 | |
---|
991 | pango_layout_get_pixel_extents (layout, &ink_rect, NULL); |
---|
992 | |
---|
993 | line = pango_layout_get_line (layout, 0); |
---|
994 | if (line == NULL) |
---|
995 | line_ink_rect = ink_rect; /* nothing to draw anyway */ |
---|
996 | else |
---|
997 | pango_layout_line_get_pixel_extents (line, &line_ink_rect, NULL); |
---|
998 | |
---|
999 | bitmap.rows = ink_rect.height; |
---|
1000 | bitmap.width = ink_rect.width; |
---|
1001 | bitmap.pitch = (bitmap.width + 3) & ~3; |
---|
1002 | bitmap.buffer = g_malloc0 (bitmap.rows * bitmap.pitch); |
---|
1003 | bitmap.num_grays = 0x100; |
---|
1004 | bitmap.pixel_mode = ft_pixel_mode_grays; |
---|
1005 | |
---|
1006 | pango_ft2_render_layout (&bitmap, layout, -ink_rect.x, -ink_rect.y); |
---|
1007 | |
---|
1008 | g_object_unref (layout); |
---|
1009 | |
---|
1010 | rsvg_render_paint_server (render, state->fill, NULL); /* todo: paint server ctx */ |
---|
1011 | opacity = state->fill_opacity * state->opacity; |
---|
1012 | opacity = opacity + (opacity >> 7) + (opacity >> 14); |
---|
1013 | #ifdef VERBOSE |
---|
1014 | fprintf (stderr, "opacity = %d\n", opacity); |
---|
1015 | #endif |
---|
1016 | art_render_mask_solid (render, opacity); |
---|
1017 | art_render_mask (render, |
---|
1018 | state->affine[4] + line_ink_rect.x, |
---|
1019 | state->affine[5] + line_ink_rect.y, |
---|
1020 | state->affine[4] + line_ink_rect.x + bitmap.width, |
---|
1021 | state->affine[5] + line_ink_rect.y + bitmap.rows, |
---|
1022 | bitmap.buffer, bitmap.pitch); |
---|
1023 | art_render_invoke (render); |
---|
1024 | g_free (bitmap.buffer); |
---|
1025 | |
---|
1026 | g_free (string); |
---|
1027 | } |
---|
1028 | |
---|
1029 | static void |
---|
1030 | rsvg_start_text (RsvgHandle *ctx, const xmlChar **atts) |
---|
1031 | { |
---|
1032 | RsvgSaxHandlerText *handler = g_new0 (RsvgSaxHandlerText, 1); |
---|
1033 | |
---|
1034 | handler->super.free = rsvg_text_handler_free; |
---|
1035 | handler->super.characters = rsvg_text_handler_characters; |
---|
1036 | handler->ctx = ctx; |
---|
1037 | |
---|
1038 | /* todo: parse "x" and "y" attributes */ |
---|
1039 | handler->xpos = 0; |
---|
1040 | handler->ypos = 0; |
---|
1041 | |
---|
1042 | rsvg_parse_style_attrs (ctx, atts); |
---|
1043 | ctx->handler = &handler->super; |
---|
1044 | #ifdef VERBOSE |
---|
1045 | fprintf (stderr, "begin text!\n"); |
---|
1046 | #endif |
---|
1047 | } |
---|
1048 | |
---|
1049 | /* end text */ |
---|
1050 | |
---|
1051 | static void |
---|
1052 | rsvg_start_defs (RsvgHandle *ctx, const xmlChar **atts) |
---|
1053 | { |
---|
1054 | RsvgState *state = &ctx->state[ctx->n_state - 1]; |
---|
1055 | |
---|
1056 | state->in_defs = TRUE; |
---|
1057 | } |
---|
1058 | |
---|
1059 | typedef struct _RsvgSaxHandlerGstops RsvgSaxHandlerGstops; |
---|
1060 | |
---|
1061 | struct _RsvgSaxHandlerGstops { |
---|
1062 | RsvgSaxHandler super; |
---|
1063 | RsvgHandle *ctx; |
---|
1064 | RsvgGradientStops *stops; |
---|
1065 | }; |
---|
1066 | |
---|
1067 | static void |
---|
1068 | rsvg_gradient_stop_handler_free (RsvgSaxHandler *self) |
---|
1069 | { |
---|
1070 | g_free (self); |
---|
1071 | } |
---|
1072 | |
---|
1073 | static void |
---|
1074 | rsvg_gradient_stop_handler_start (RsvgSaxHandler *self, const xmlChar *name, |
---|
1075 | const xmlChar **atts) |
---|
1076 | { |
---|
1077 | RsvgSaxHandlerGstops *z = (RsvgSaxHandlerGstops *)self; |
---|
1078 | RsvgGradientStops *stops = z->stops; |
---|
1079 | int i; |
---|
1080 | double offset = 0; |
---|
1081 | gboolean got_offset = FALSE; |
---|
1082 | gint fixed; |
---|
1083 | RsvgState state; |
---|
1084 | int n_stop; |
---|
1085 | |
---|
1086 | if (strcmp ((char *)name, "stop")) |
---|
1087 | { |
---|
1088 | g_warning ("unexpected <%s> element in gradient\n", name); |
---|
1089 | return; |
---|
1090 | } |
---|
1091 | |
---|
1092 | rsvg_state_init (&state); |
---|
1093 | |
---|
1094 | if (atts != NULL) |
---|
1095 | { |
---|
1096 | for (i = 0; atts[i] != NULL; i += 2) |
---|
1097 | { |
---|
1098 | if (!strcmp ((char *)atts[i], "offset")) |
---|
1099 | { |
---|
1100 | offset = rsvg_css_parse_length ((char *)atts[i + 1], &fixed); |
---|
1101 | got_offset = TRUE; |
---|
1102 | } |
---|
1103 | else if (!strcmp ((char *)atts[i], "style")) |
---|
1104 | rsvg_parse_style (z->ctx, &state, (char *)atts[i + 1]); |
---|
1105 | } |
---|
1106 | } |
---|
1107 | |
---|
1108 | rsvg_state_finalize (&state); |
---|
1109 | |
---|
1110 | if (!got_offset) |
---|
1111 | { |
---|
1112 | g_warning ("gradient stop must specify offset\n"); |
---|
1113 | return; |
---|
1114 | } |
---|
1115 | |
---|
1116 | n_stop = stops->n_stop++; |
---|
1117 | if (n_stop == 0) |
---|
1118 | stops->stop = g_new (RsvgGradientStop, 1); |
---|
1119 | else if (!(n_stop & (n_stop - 1))) |
---|
1120 | /* double the allocation if size is a power of two */ |
---|
1121 | stops->stop = g_renew (RsvgGradientStop, stops->stop, n_stop << 1); |
---|
1122 | stops->stop[n_stop].offset = offset; |
---|
1123 | stops->stop[n_stop].rgba = (state.stop_color << 8) | state.stop_opacity; |
---|
1124 | } |
---|
1125 | |
---|
1126 | static void |
---|
1127 | rsvg_gradient_stop_handler_end (RsvgSaxHandler *self, const xmlChar *name) |
---|
1128 | { |
---|
1129 | } |
---|
1130 | |
---|
1131 | static RsvgSaxHandler * |
---|
1132 | rsvg_gradient_stop_handler_new (RsvgHandle *ctx, RsvgGradientStops **p_stops) |
---|
1133 | { |
---|
1134 | RsvgSaxHandlerGstops *gstops = g_new0 (RsvgSaxHandlerGstops, 1); |
---|
1135 | RsvgGradientStops *stops = g_new (RsvgGradientStops, 1); |
---|
1136 | |
---|
1137 | gstops->super.free = rsvg_gradient_stop_handler_free; |
---|
1138 | gstops->super.start_element = rsvg_gradient_stop_handler_start; |
---|
1139 | gstops->super.end_element = rsvg_gradient_stop_handler_end; |
---|
1140 | gstops->ctx = ctx; |
---|
1141 | gstops->stops = stops; |
---|
1142 | |
---|
1143 | stops->n_stop = 0; |
---|
1144 | stops->stop = NULL; |
---|
1145 | |
---|
1146 | *p_stops = stops; |
---|
1147 | return &gstops->super; |
---|
1148 | } |
---|
1149 | |
---|
1150 | static void |
---|
1151 | rsvg_linear_gradient_free (RsvgDefVal *self) |
---|
1152 | { |
---|
1153 | RsvgLinearGradient *z = (RsvgLinearGradient *)self; |
---|
1154 | |
---|
1155 | g_free (z->stops->stop); |
---|
1156 | g_free (z->stops); |
---|
1157 | g_free (self); |
---|
1158 | } |
---|
1159 | |
---|
1160 | static void |
---|
1161 | rsvg_start_linear_gradient (RsvgHandle *ctx, const xmlChar **atts) |
---|
1162 | { |
---|
1163 | RsvgState *state = &ctx->state[ctx->n_state - 1]; |
---|
1164 | RsvgLinearGradient *grad; |
---|
1165 | int i; |
---|
1166 | char *id = NULL; |
---|
1167 | double x1 = 0, y1 = 0, x2 = 100, y2 = 0; |
---|
1168 | ArtGradientSpread spread = ART_GRADIENT_PAD; |
---|
1169 | |
---|
1170 | /* todo: only handles numeric coordinates in gradientUnits = userSpace */ |
---|
1171 | if (atts != NULL) |
---|
1172 | { |
---|
1173 | for (i = 0; atts[i] != NULL; i += 2) |
---|
1174 | { |
---|
1175 | if (!strcmp ((char *)atts[i], "id")) |
---|
1176 | id = (char *)atts[i + 1]; |
---|
1177 | else if (!strcmp ((char *)atts[i], "x1")) |
---|
1178 | x1 = atof ((char *)atts[i + 1]); |
---|
1179 | else if (!strcmp ((char *)atts[i], "y1")) |
---|
1180 | y1 = atof ((char *)atts[i + 1]); |
---|
1181 | else if (!strcmp ((char *)atts[i], "x2")) |
---|
1182 | x2 = atof ((char *)atts[i + 1]); |
---|
1183 | else if (!strcmp ((char *)atts[i], "y2")) |
---|
1184 | y2 = atof ((char *)atts[i + 1]); |
---|
1185 | else if (!strcmp ((char *)atts[i], "spreadMethod")) |
---|
1186 | { |
---|
1187 | if (!strcmp ((char *)atts[i + 1], "pad")) |
---|
1188 | spread = ART_GRADIENT_PAD; |
---|
1189 | else if (!strcmp ((char *)atts[i + 1], "reflect")) |
---|
1190 | spread = ART_GRADIENT_REFLECT; |
---|
1191 | else if (!strcmp ((char *)atts[i + 1], "repeat")) |
---|
1192 | spread = ART_GRADIENT_REPEAT; |
---|
1193 | } |
---|
1194 | } |
---|
1195 | } |
---|
1196 | |
---|
1197 | grad = g_new (RsvgLinearGradient, 1); |
---|
1198 | grad->super.type = RSVG_DEF_LINGRAD; |
---|
1199 | grad->super.free = rsvg_linear_gradient_free; |
---|
1200 | |
---|
1201 | ctx->handler = rsvg_gradient_stop_handler_new (ctx, &grad->stops); |
---|
1202 | |
---|
1203 | rsvg_defs_set (ctx->defs, id, &grad->super); |
---|
1204 | |
---|
1205 | for (i = 0; i < 6; i++) |
---|
1206 | grad->affine[i] = state->affine[i]; |
---|
1207 | grad->x1 = x1; |
---|
1208 | grad->y1 = y1; |
---|
1209 | grad->x2 = x2; |
---|
1210 | grad->y2 = y2; |
---|
1211 | grad->spread = spread; |
---|
1212 | } |
---|
1213 | |
---|
1214 | static void |
---|
1215 | rsvg_radial_gradient_free (RsvgDefVal *self) |
---|
1216 | { |
---|
1217 | RsvgRadialGradient *z = (RsvgRadialGradient *)self; |
---|
1218 | |
---|
1219 | g_free (z->stops->stop); |
---|
1220 | g_free (z->stops); |
---|
1221 | g_free (self); |
---|
1222 | } |
---|
1223 | |
---|
1224 | static void |
---|
1225 | rsvg_start_radial_gradient (RsvgHandle *ctx, const xmlChar **atts) |
---|
1226 | { |
---|
1227 | RsvgState *state = &ctx->state[ctx->n_state - 1]; |
---|
1228 | RsvgRadialGradient *grad; |
---|
1229 | int i; |
---|
1230 | char *id = NULL; |
---|
1231 | double cx = 50, cy = 50, r = 50, fx = 50, fy = 50; |
---|
1232 | |
---|
1233 | /* todo: only handles numeric coordinates in gradientUnits = userSpace */ |
---|
1234 | if (atts != NULL) |
---|
1235 | { |
---|
1236 | for (i = 0; atts[i] != NULL; i += 2) |
---|
1237 | { |
---|
1238 | if (!strcmp ((char *)atts[i], "id")) |
---|
1239 | id = (char *)atts[i + 1]; |
---|
1240 | else if (!strcmp ((char *)atts[i], "cx")) |
---|
1241 | cx = atof ((char *)atts[i + 1]); |
---|
1242 | else if (!strcmp ((char *)atts[i], "cy")) |
---|
1243 | cy = atof ((char *)atts[i + 1]); |
---|
1244 | else if (!strcmp ((char *)atts[i], "r")) |
---|
1245 | r = atof ((char *)atts[i + 1]); |
---|
1246 | else if (!strcmp ((char *)atts[i], "fx")) |
---|
1247 | fx = atof ((char *)atts[i + 1]); |
---|
1248 | else if (!strcmp ((char *)atts[i], "fy")) |
---|
1249 | fy = atof ((char *)atts[i + 1]); |
---|
1250 | } |
---|
1251 | } |
---|
1252 | |
---|
1253 | grad = g_new (RsvgRadialGradient, 1); |
---|
1254 | grad->super.type = RSVG_DEF_RADGRAD; |
---|
1255 | grad->super.free = rsvg_radial_gradient_free; |
---|
1256 | |
---|
1257 | ctx->handler = rsvg_gradient_stop_handler_new (ctx, &grad->stops); |
---|
1258 | |
---|
1259 | rsvg_defs_set (ctx->defs, id, &grad->super); |
---|
1260 | |
---|
1261 | for (i = 0; i < 6; i++) |
---|
1262 | grad->affine[i] = state->affine[i]; |
---|
1263 | grad->cx = cx; |
---|
1264 | grad->cy = cy; |
---|
1265 | grad->r = r; |
---|
1266 | grad->fx = fx; |
---|
1267 | grad->fy = fy; |
---|
1268 | } |
---|
1269 | |
---|
1270 | static void |
---|
1271 | rsvg_start_element (void *data, const xmlChar *name, const xmlChar **atts) |
---|
1272 | { |
---|
1273 | RsvgHandle *ctx = (RsvgHandle *)data; |
---|
1274 | #ifdef VERBOSE |
---|
1275 | int i; |
---|
1276 | #endif |
---|
1277 | |
---|
1278 | #ifdef VERBOSE |
---|
1279 | fprintf (stdout, "SAX.startElement(%s", (char *) name); |
---|
1280 | if (atts != NULL) { |
---|
1281 | for (i = 0;(atts[i] != NULL);i++) { |
---|
1282 | fprintf (stdout, ", %s='", atts[i++]); |
---|
1283 | fprintf (stdout, "%s'", atts[i]); |
---|
1284 | } |
---|
1285 | } |
---|
1286 | fprintf (stdout, ")\n"); |
---|
1287 | #endif |
---|
1288 | |
---|
1289 | if (ctx->handler) |
---|
1290 | { |
---|
1291 | ctx->handler_nest++; |
---|
1292 | if (ctx->handler->start_element != NULL) |
---|
1293 | ctx->handler->start_element (ctx->handler, name, atts); |
---|
1294 | } |
---|
1295 | else |
---|
1296 | { |
---|
1297 | /* push the state stack */ |
---|
1298 | if (ctx->n_state == ctx->n_state_max) |
---|
1299 | ctx->state = g_renew (RsvgState, ctx->state, ctx->n_state_max <<= 1); |
---|
1300 | if (ctx->n_state) |
---|
1301 | rsvg_state_clone (&ctx->state[ctx->n_state], |
---|
1302 | &ctx->state[ctx->n_state - 1]); |
---|
1303 | else |
---|
1304 | rsvg_state_init (ctx->state); |
---|
1305 | ctx->n_state++; |
---|
1306 | |
---|
1307 | if (!strcmp ((char *)name, "svg")) |
---|
1308 | rsvg_start_svg (ctx, atts); |
---|
1309 | else if (!strcmp ((char *)name, "g")) |
---|
1310 | rsvg_start_g (ctx, atts); |
---|
1311 | else if (!strcmp ((char *)name, "path")) |
---|
1312 | rsvg_start_path (ctx, atts); |
---|
1313 | else if (!strcmp ((char *)name, "text")) |
---|
1314 | rsvg_start_text (ctx, atts); |
---|
1315 | else if (!strcmp ((char *)name, "defs")) |
---|
1316 | rsvg_start_defs (ctx, atts); |
---|
1317 | else if (!strcmp ((char *)name, "linearGradient")) |
---|
1318 | rsvg_start_linear_gradient (ctx, atts); |
---|
1319 | else if (!strcmp ((char *)name, "radialGradient")) |
---|
1320 | rsvg_start_radial_gradient (ctx, atts); |
---|
1321 | } |
---|
1322 | } |
---|
1323 | |
---|
1324 | static void |
---|
1325 | rsvg_end_element (void *data, const xmlChar *name) |
---|
1326 | { |
---|
1327 | RsvgHandle *ctx = (RsvgHandle *)data; |
---|
1328 | |
---|
1329 | if (ctx->handler_nest > 0) |
---|
1330 | { |
---|
1331 | if (ctx->handler->end_element != NULL) |
---|
1332 | ctx->handler->end_element (ctx->handler, name); |
---|
1333 | ctx->handler_nest--; |
---|
1334 | } |
---|
1335 | else |
---|
1336 | { |
---|
1337 | if (ctx->handler != NULL) |
---|
1338 | { |
---|
1339 | ctx->handler->free (ctx->handler); |
---|
1340 | ctx->handler = NULL; |
---|
1341 | } |
---|
1342 | |
---|
1343 | if (!strcmp ((char *)name, "g")) |
---|
1344 | rsvg_end_g (ctx); |
---|
1345 | |
---|
1346 | /* pop the state stack */ |
---|
1347 | ctx->n_state--; |
---|
1348 | rsvg_state_finalize (&ctx->state[ctx->n_state]); |
---|
1349 | |
---|
1350 | #ifdef VERBOSE |
---|
1351 | fprintf (stdout, "SAX.endElement(%s)\n", (char *) name); |
---|
1352 | #endif |
---|
1353 | } |
---|
1354 | } |
---|
1355 | |
---|
1356 | static void |
---|
1357 | rsvg_characters (void *data, const xmlChar *ch, int len) |
---|
1358 | { |
---|
1359 | RsvgHandle *ctx = (RsvgHandle *)data; |
---|
1360 | |
---|
1361 | if (ctx->handler && ctx->handler->characters != NULL) |
---|
1362 | ctx->handler->characters (ctx->handler, ch, len); |
---|
1363 | } |
---|
1364 | |
---|
1365 | static xmlEntityPtr |
---|
1366 | rsvg_get_entity (void *data, const xmlChar *name) |
---|
1367 | { |
---|
1368 | RsvgHandle *ctx = (RsvgHandle *)data; |
---|
1369 | |
---|
1370 | return (xmlEntityPtr)g_hash_table_lookup (ctx->entities, name); |
---|
1371 | } |
---|
1372 | |
---|
1373 | static void |
---|
1374 | rsvg_entity_decl (void *data, const xmlChar *name, int type, |
---|
1375 | const xmlChar *publicId, const xmlChar *systemId, xmlChar *content) |
---|
1376 | { |
---|
1377 | RsvgHandle *ctx = (RsvgHandle *)data; |
---|
1378 | GHashTable *entities = ctx->entities; |
---|
1379 | xmlEntityPtr entity; |
---|
1380 | char *dupname; |
---|
1381 | |
---|
1382 | entity = g_new0 (xmlEntity, 1); |
---|
1383 | entity->type = type; |
---|
1384 | entity->length = strlen (name); |
---|
1385 | dupname = g_strdup (name); |
---|
1386 | entity->name = dupname; |
---|
1387 | entity->ExternalID = g_strdup (publicId); |
---|
1388 | entity->SystemID = g_strdup (systemId); |
---|
1389 | if (content) |
---|
1390 | { |
---|
1391 | entity->content = xmlMemStrdup (content); |
---|
1392 | entity->length = strlen (content); |
---|
1393 | } |
---|
1394 | g_hash_table_insert (entities, dupname, entity); |
---|
1395 | } |
---|
1396 | |
---|
1397 | static void |
---|
1398 | rsvg_error_cb (void *data, const char *msg, ...) |
---|
1399 | { |
---|
1400 | va_list args; |
---|
1401 | |
---|
1402 | va_start (args, msg); |
---|
1403 | #ifdef VERBOSE |
---|
1404 | fprintf (stderr, "fatal svg parse error: "); |
---|
1405 | #endif |
---|
1406 | vfprintf (stderr, msg, args); |
---|
1407 | va_end (args); |
---|
1408 | } |
---|
1409 | |
---|
1410 | static xmlSAXHandler rsvgSAXHandlerStruct = { |
---|
1411 | NULL, /* internalSubset */ |
---|
1412 | NULL, /* isStandalone */ |
---|
1413 | NULL, /* hasInternalSubset */ |
---|
1414 | NULL, /* hasExternalSubset */ |
---|
1415 | NULL, /* resolveEntity */ |
---|
1416 | rsvg_get_entity, /* getEntity */ |
---|
1417 | rsvg_entity_decl, /* entityDecl */ |
---|
1418 | NULL, /* notationDecl */ |
---|
1419 | NULL, /* attributeDecl */ |
---|
1420 | NULL, /* elementDecl */ |
---|
1421 | NULL, /* unparsedEntityDecl */ |
---|
1422 | NULL, /* setDocumentLocator */ |
---|
1423 | NULL, /* startDocument */ |
---|
1424 | NULL, /* endDocument */ |
---|
1425 | rsvg_start_element, /* startElement */ |
---|
1426 | rsvg_end_element, /* endElement */ |
---|
1427 | NULL, /* reference */ |
---|
1428 | rsvg_characters, /* characters */ |
---|
1429 | NULL, /* ignorableWhitespace */ |
---|
1430 | NULL, /* processingInstruction */ |
---|
1431 | NULL, /* comment */ |
---|
1432 | NULL, /* xmlParserWarning */ |
---|
1433 | rsvg_error_cb, /* xmlParserError */ |
---|
1434 | rsvg_error_cb, /* xmlParserFatalError */ |
---|
1435 | NULL, /* getParameterEntity */ |
---|
1436 | }; |
---|
1437 | |
---|
1438 | GQuark |
---|
1439 | rsvg_error_quark (void) |
---|
1440 | { |
---|
1441 | static GQuark q = 0; |
---|
1442 | if (q == 0) |
---|
1443 | q = g_quark_from_static_string ("rsvg-error-quark"); |
---|
1444 | |
---|
1445 | return q; |
---|
1446 | } |
---|
1447 | |
---|
1448 | /** |
---|
1449 | * rsvg_handle_new: |
---|
1450 | * @void: |
---|
1451 | * |
---|
1452 | * Returns a new rsvg handle. Must be freed with @rsvg_handle_free. This |
---|
1453 | * handle can be used for dynamically loading an image. You need to feed it |
---|
1454 | * data using @rsvg_handle_write, then call @rsvg_handle_close when done. No |
---|
1455 | * more than one image can be loaded with one handle. |
---|
1456 | * |
---|
1457 | * Return value: A new #RsvgHandle |
---|
1458 | **/ |
---|
1459 | RsvgHandle * |
---|
1460 | rsvg_handle_new (void) |
---|
1461 | { |
---|
1462 | RsvgHandle *handle; |
---|
1463 | |
---|
1464 | handle = g_new0 (RsvgHandle, 1); |
---|
1465 | handle->n_state = 0; |
---|
1466 | handle->n_state_max = 16; |
---|
1467 | handle->state = g_new (RsvgState, handle->n_state_max); |
---|
1468 | handle->defs = rsvg_defs_new (); |
---|
1469 | handle->handler_nest = 0; |
---|
1470 | handle->entities = g_hash_table_new (g_str_hash, g_str_equal); |
---|
1471 | |
---|
1472 | handle->ctxt = NULL; |
---|
1473 | |
---|
1474 | return handle; |
---|
1475 | } |
---|
1476 | |
---|
1477 | /** |
---|
1478 | * rsvg_handle_set_size_callback: |
---|
1479 | * @handle: An #RsvgHandle |
---|
1480 | * @size_func: A sizing function, or %NULL |
---|
1481 | * @user_data: User data to pass to @size_func, or %NULL |
---|
1482 | * @user_data_destroy: Destroy function for @user_data, or %NULL |
---|
1483 | * |
---|
1484 | * Sets the sizing function for the @handle. This function is called right |
---|
1485 | * after the size of the image has been loaded. The size of the image is passed |
---|
1486 | * in to the function, which may then modify these values to set the real size |
---|
1487 | * of the generated pixbuf. If the image has no associated size, then the size |
---|
1488 | * arguments are set to -1. |
---|
1489 | **/ |
---|
1490 | void |
---|
1491 | rsvg_handle_set_size_callback (RsvgHandle *handle, |
---|
1492 | RsvgSizeFunc size_func, |
---|
1493 | gpointer user_data, |
---|
1494 | GDestroyNotify user_data_destroy) |
---|
1495 | { |
---|
1496 | g_return_if_fail (handle != NULL); |
---|
1497 | |
---|
1498 | if (handle->user_data_destroy) |
---|
1499 | (* handle->user_data_destroy) (handle->user_data); |
---|
1500 | |
---|
1501 | handle->size_func = size_func; |
---|
1502 | handle->user_data = user_data; |
---|
1503 | handle->user_data_destroy = user_data_destroy; |
---|
1504 | } |
---|
1505 | |
---|
1506 | /** |
---|
1507 | * rsvg_handle_write: |
---|
1508 | * @handle: An #RsvgHandle |
---|
1509 | * @buf: Pointer to svg data |
---|
1510 | * @count: length of the @buf buffer in bytes |
---|
1511 | * @error: return location for errors |
---|
1512 | * |
---|
1513 | * Loads the next @count bytes of the image. This will return #TRUE if the data |
---|
1514 | * was loaded successful, and #FALSE if an error occurred. In the latter case, |
---|
1515 | * the loader will be closed, and will not accept further writes. If FALSE is |
---|
1516 | * returned, @error will be set to an error from the #RSVG_ERROR domain. |
---|
1517 | * |
---|
1518 | * Return value: #TRUE if the write was successful, or #FALSE if there was an |
---|
1519 | * error. |
---|
1520 | **/ |
---|
1521 | gboolean |
---|
1522 | rsvg_handle_write (RsvgHandle *handle, |
---|
1523 | const guchar *buf, |
---|
1524 | gsize count, |
---|
1525 | GError **error) |
---|
1526 | { |
---|
1527 | GError *real_error; |
---|
1528 | g_return_val_if_fail (handle != NULL, FALSE); |
---|
1529 | |
---|
1530 | handle->error = &real_error; |
---|
1531 | if (handle->ctxt == NULL) |
---|
1532 | { |
---|
1533 | handle->ctxt = xmlCreatePushParserCtxt ( |
---|
1534 | &rsvgSAXHandlerStruct, handle, NULL, 0, NULL); |
---|
1535 | handle->ctxt->replaceEntities = TRUE; |
---|
1536 | } |
---|
1537 | |
---|
1538 | xmlParseChunk (handle->ctxt, buf, count, 0); |
---|
1539 | |
---|
1540 | handle->error = NULL; |
---|
1541 | /* FIXME: Error handling not implemented. */ |
---|
1542 | /* if (*real_error != NULL) |
---|
1543 | { |
---|
1544 | g_propagate_error (error, real_error); |
---|
1545 | return FALSE; |
---|
1546 | }*/ |
---|
1547 | return TRUE; |
---|
1548 | } |
---|
1549 | |
---|
1550 | /** |
---|
1551 | * rsvg_handle_close: |
---|
1552 | * @handle: An #RsvgHandle |
---|
1553 | * |
---|
1554 | * Closes @handle, to indicate that loading the image is complete. This will |
---|
1555 | * return #TRUE if the loader closed successfully. Note that @handle isn't |
---|
1556 | * freed until @rsvg_handle_free is called. |
---|
1557 | * |
---|
1558 | * Return value: #TRUE if the loader closed successfully, or #FALSE if there was |
---|
1559 | * an error. |
---|
1560 | **/ |
---|
1561 | gboolean |
---|
1562 | rsvg_handle_close (RsvgHandle *handle, |
---|
1563 | GError **error) |
---|
1564 | { |
---|
1565 | gchar chars[1] = { '\0' }; |
---|
1566 | GError *real_error; |
---|
1567 | |
---|
1568 | handle->error = &real_error; |
---|
1569 | |
---|
1570 | if (handle->ctxt != NULL) |
---|
1571 | { |
---|
1572 | xmlParseChunk (handle->ctxt, chars, 1, TRUE); |
---|
1573 | xmlFreeParserCtxt (handle->ctxt); |
---|
1574 | } |
---|
1575 | |
---|
1576 | /* FIXME: Error handling not implemented. */ |
---|
1577 | /* |
---|
1578 | if (real_error != NULL) |
---|
1579 | { |
---|
1580 | g_propagate_error (error, real_error); |
---|
1581 | return FALSE; |
---|
1582 | }*/ |
---|
1583 | return TRUE; |
---|
1584 | } |
---|
1585 | |
---|
1586 | /** |
---|
1587 | * rsvg_handle_get_pixbuf: |
---|
1588 | * @handle: An #RsvgHandle |
---|
1589 | * |
---|
1590 | * Returns the pixbuf loaded by #handle. The pixbuf returned will be reffed, so |
---|
1591 | * the caller of this function must assume that ref. If insufficient data has |
---|
1592 | * been read to create the pixbuf, or an error occurred in loading, then %NULL |
---|
1593 | * will be returned. Note that the pixbuf may not be complete until |
---|
1594 | * @rsvg_handle_close has been called. |
---|
1595 | * |
---|
1596 | * Return value: the pixbuf loaded by #handle, or %NULL. |
---|
1597 | **/ |
---|
1598 | GdkPixbuf * |
---|
1599 | rsvg_handle_get_pixbuf (RsvgHandle *handle) |
---|
1600 | { |
---|
1601 | g_return_val_if_fail (handle != NULL, NULL); |
---|
1602 | |
---|
1603 | if (handle->pixbuf) |
---|
1604 | return g_object_ref (handle->pixbuf); |
---|
1605 | |
---|
1606 | return NULL; |
---|
1607 | } |
---|
1608 | |
---|
1609 | /** |
---|
1610 | * rsvg_handle_free: |
---|
1611 | * @handle: An #RsvgHandle |
---|
1612 | * |
---|
1613 | * Frees #handle. |
---|
1614 | **/ |
---|
1615 | void |
---|
1616 | rsvg_handle_free (RsvgHandle *handle) |
---|
1617 | { |
---|
1618 | int i; |
---|
1619 | |
---|
1620 | if (handle->pango_context != NULL) |
---|
1621 | g_object_unref (handle->pango_context); |
---|
1622 | rsvg_defs_free (handle->defs); |
---|
1623 | |
---|
1624 | for (i = 0; i < handle->n_state; i++) |
---|
1625 | rsvg_state_finalize (&handle->state[i]); |
---|
1626 | g_free (handle->state); |
---|
1627 | |
---|
1628 | g_hash_table_foreach (handle->entities, rsvg_ctx_free_helper, NULL); |
---|
1629 | g_hash_table_destroy (handle->entities); |
---|
1630 | |
---|
1631 | if (handle->user_data_destroy) |
---|
1632 | (* handle->user_data_destroy) (handle->user_data); |
---|
1633 | if (handle->pixbuf) |
---|
1634 | g_object_unref (handle->pixbuf); |
---|
1635 | g_free (handle); |
---|
1636 | } |
---|
1637 | |
---|
1638 | typedef enum { |
---|
1639 | RSVG_SIZE_ZOOM, |
---|
1640 | RSVG_SIZE_WH, |
---|
1641 | RSVG_SIZE_WH_MAX, |
---|
1642 | RSVG_SIZE_ZOOM_MAX |
---|
1643 | } RsvgSizeType; |
---|
1644 | |
---|
1645 | struct RsvgSizeCallbackData |
---|
1646 | { |
---|
1647 | double x_zoom; |
---|
1648 | double y_zoom; |
---|
1649 | gint width; |
---|
1650 | gint height; |
---|
1651 | RsvgSizeType type; |
---|
1652 | gboolean zoom_set; |
---|
1653 | gboolean max_size_set; |
---|
1654 | }; |
---|
1655 | |
---|
1656 | static void |
---|
1657 | rsvg_size_callback (int *width, |
---|
1658 | int *height, |
---|
1659 | gpointer data) |
---|
1660 | { |
---|
1661 | struct RsvgSizeCallbackData *real_data = (struct RsvgSizeCallbackData *) data; |
---|
1662 | double zoomx, zoomy, zoom; |
---|
1663 | |
---|
1664 | switch (real_data->type) { |
---|
1665 | case RSVG_SIZE_ZOOM: |
---|
1666 | if (*width < 0 || *height < 0) |
---|
1667 | return; |
---|
1668 | |
---|
1669 | *width = floor (real_data->x_zoom * *width + 0.5); |
---|
1670 | *height = floor (real_data->y_zoom * *height + 0.5); |
---|
1671 | return; |
---|
1672 | |
---|
1673 | case RSVG_SIZE_ZOOM_MAX: |
---|
1674 | if (*width < 0 || *height < 0) |
---|
1675 | return; |
---|
1676 | |
---|
1677 | *width = floor (real_data->x_zoom * *width + 0.5); |
---|
1678 | *height = floor (real_data->y_zoom * *height + 0.5); |
---|
1679 | |
---|
1680 | if (*width > real_data->width || *height > real_data->height) |
---|
1681 | { |
---|
1682 | zoomx = (double) real_data->width / *width; |
---|
1683 | zoomy = (double) real_data->height / *height; |
---|
1684 | zoom = MIN (zoomx, zoomy); |
---|
1685 | |
---|
1686 | *width = floor (zoom * *width + 0.5); |
---|
1687 | *height = floor (zoom * *height + 0.5); |
---|
1688 | } |
---|
1689 | return; |
---|
1690 | |
---|
1691 | case RSVG_SIZE_WH_MAX: |
---|
1692 | if (*width < 0 || *height < 0) |
---|
1693 | return; |
---|
1694 | |
---|
1695 | zoomx = (double) real_data->width / *width; |
---|
1696 | zoomy = (double) real_data->height / *height; |
---|
1697 | zoom = MIN (zoomx, zoomy); |
---|
1698 | |
---|
1699 | *width = floor (zoom * *width + 0.5); |
---|
1700 | *height = floor (zoom * *height + 0.5); |
---|
1701 | return; |
---|
1702 | |
---|
1703 | case RSVG_SIZE_WH: |
---|
1704 | if (*width < 0 || *height < 0) |
---|
1705 | return; |
---|
1706 | |
---|
1707 | if (real_data->width != -1) |
---|
1708 | *width = real_data->width; |
---|
1709 | if (real_data->height != -1) |
---|
1710 | *height = real_data->height; |
---|
1711 | return; |
---|
1712 | } |
---|
1713 | |
---|
1714 | g_assert_not_reached (); |
---|
1715 | } |
---|
1716 | |
---|
1717 | /** |
---|
1718 | * rsvg_pixbuf_from_file: |
---|
1719 | * @file_name: A file name |
---|
1720 | * @error: return location for errors |
---|
1721 | * |
---|
1722 | * Loads a new #GdkPixbuf from @file_name and returns it. The caller must |
---|
1723 | * assume the reference to the reurned pixbuf. If an error occurred, @error is |
---|
1724 | * set and %NULL is returned. |
---|
1725 | * |
---|
1726 | * Return value: A newly allocated #GdkPixbuf, or %NULL |
---|
1727 | **/ |
---|
1728 | GdkPixbuf * |
---|
1729 | rsvg_pixbuf_from_file (const gchar *file_name, |
---|
1730 | GError **error) |
---|
1731 | { |
---|
1732 | return rsvg_pixbuf_from_file_at_size (file_name, -1, -1, error); |
---|
1733 | } |
---|
1734 | |
---|
1735 | /** |
---|
1736 | * rsvg_pixbuf_from_file_at_zoom: |
---|
1737 | * @file_name: A file name |
---|
1738 | * @x_zoom: The horizontal zoom factor |
---|
1739 | * @y_zoom: The vertical zoom factor |
---|
1740 | * @error: return location for errors |
---|
1741 | * |
---|
1742 | * Loads a new #GdkPixbuf from @file_name and returns it. This pixbuf is scaled |
---|
1743 | * from the size indicated by the file by a factor of @x_zoom and @y_zoom. The |
---|
1744 | * caller must assume the reference to the returned pixbuf. If an error |
---|
1745 | * occurred, @error is set and %NULL is returned. |
---|
1746 | * |
---|
1747 | * Return value: A newly allocated #GdkPixbuf, or %NULL |
---|
1748 | **/ |
---|
1749 | GdkPixbuf * |
---|
1750 | rsvg_pixbuf_from_file_at_zoom (const gchar *file_name, |
---|
1751 | double x_zoom, |
---|
1752 | double y_zoom, |
---|
1753 | GError **error) |
---|
1754 | { |
---|
1755 | FILE *f; |
---|
1756 | char chars[SVG_BUFFER_SIZE]; |
---|
1757 | gint result; |
---|
1758 | GdkPixbuf *retval; |
---|
1759 | RsvgHandle *handle; |
---|
1760 | struct RsvgSizeCallbackData data; |
---|
1761 | |
---|
1762 | g_return_val_if_fail (file_name != NULL, NULL); |
---|
1763 | g_return_val_if_fail (x_zoom > 0.0 && y_zoom > 0.0, NULL); |
---|
1764 | |
---|
1765 | f = fopen (file_name, "r"); |
---|
1766 | if (!f) |
---|
1767 | { |
---|
1768 | /* FIXME: Set up error. */ |
---|
1769 | return NULL; |
---|
1770 | } |
---|
1771 | |
---|
1772 | handle = rsvg_handle_new (); |
---|
1773 | data.type = RSVG_SIZE_ZOOM; |
---|
1774 | data.x_zoom = x_zoom; |
---|
1775 | data.y_zoom = y_zoom; |
---|
1776 | |
---|
1777 | rsvg_handle_set_size_callback (handle, rsvg_size_callback, &data, NULL); |
---|
1778 | while ((result = fread (chars, 1, SVG_BUFFER_SIZE, f)) > 0) |
---|
1779 | rsvg_handle_write (handle, chars, result, error); |
---|
1780 | rsvg_handle_close (handle, error); |
---|
1781 | |
---|
1782 | retval = rsvg_handle_get_pixbuf (handle); |
---|
1783 | |
---|
1784 | fclose (f); |
---|
1785 | rsvg_handle_free (handle); |
---|
1786 | return retval; |
---|
1787 | } |
---|
1788 | |
---|
1789 | /** |
---|
1790 | * rsvg_pixbuf_from_file_at_zoom_with_max: |
---|
1791 | * @file_name: A file name |
---|
1792 | * @x_zoom: The horizontal zoom factor |
---|
1793 | * @y_zoom: The vertical zoom factor |
---|
1794 | * @max_width: The requested max width |
---|
1795 | * @max_height: The requested max heigh |
---|
1796 | * @error: return location for errors |
---|
1797 | * |
---|
1798 | * Loads a new #GdkPixbuf from @file_name and returns it. This pixbuf is scaled |
---|
1799 | * from the size indicated by the file by a factor of @x_zoom and @y_zoom. If the |
---|
1800 | * resulting pixbuf would be larger than max_width/max_heigh it is uniformly scaled |
---|
1801 | * down to fit in that rectangle. The caller must assume the reference to the |
---|
1802 | * returned pixbuf. If an error occurred, @error is set and %NULL is returned. |
---|
1803 | * |
---|
1804 | * Return value: A newly allocated #GdkPixbuf, or %NULL |
---|
1805 | **/ |
---|
1806 | GdkPixbuf * |
---|
1807 | rsvg_pixbuf_from_file_at_zoom_with_max (const gchar *file_name, |
---|
1808 | double x_zoom, |
---|
1809 | double y_zoom, |
---|
1810 | gint max_width, |
---|
1811 | gint max_height, |
---|
1812 | GError **error) |
---|
1813 | { |
---|
1814 | FILE *f; |
---|
1815 | char chars[SVG_BUFFER_SIZE]; |
---|
1816 | gint result; |
---|
1817 | GdkPixbuf *retval; |
---|
1818 | RsvgHandle *handle; |
---|
1819 | struct RsvgSizeCallbackData data; |
---|
1820 | |
---|
1821 | g_return_val_if_fail (file_name != NULL, NULL); |
---|
1822 | g_return_val_if_fail (x_zoom > 0.0 && y_zoom > 0.0, NULL); |
---|
1823 | |
---|
1824 | f = fopen (file_name, "r"); |
---|
1825 | if (!f) |
---|
1826 | { |
---|
1827 | /* FIXME: Set up error. */ |
---|
1828 | return NULL; |
---|
1829 | } |
---|
1830 | |
---|
1831 | handle = rsvg_handle_new (); |
---|
1832 | data.type = RSVG_SIZE_ZOOM_MAX; |
---|
1833 | data.x_zoom = x_zoom; |
---|
1834 | data.y_zoom = y_zoom; |
---|
1835 | data.width = max_width; |
---|
1836 | data.height = max_height; |
---|
1837 | |
---|
1838 | rsvg_handle_set_size_callback (handle, rsvg_size_callback, &data, NULL); |
---|
1839 | while ((result = fread (chars, 1, SVG_BUFFER_SIZE, f)) > 0) |
---|
1840 | rsvg_handle_write (handle, chars, result, error); |
---|
1841 | rsvg_handle_close (handle, error); |
---|
1842 | |
---|
1843 | retval = rsvg_handle_get_pixbuf (handle); |
---|
1844 | |
---|
1845 | fclose (f); |
---|
1846 | rsvg_handle_free (handle); |
---|
1847 | return retval; |
---|
1848 | } |
---|
1849 | |
---|
1850 | /** |
---|
1851 | * rsvg_pixbuf_from_file_at_size: |
---|
1852 | * @file_name: A file name |
---|
1853 | * @width: The new width, or -1 |
---|
1854 | * @height: The new height, or -1 |
---|
1855 | * @error: return location for errors |
---|
1856 | * |
---|
1857 | * Loads a new #GdkPixbuf from @file_name and returns it. This pixbuf is scaled |
---|
1858 | * from the size indicated to the new size indicated by @width and @height. If |
---|
1859 | * either of these are -1, then the default size of the image being loaded is |
---|
1860 | * used. The caller must assume the reference to the returned pixbuf. If an |
---|
1861 | * error occurred, @error is set and %NULL is returned. |
---|
1862 | * |
---|
1863 | * Return value: A newly allocated #GdkPixbuf, or %NULL |
---|
1864 | **/ |
---|
1865 | GdkPixbuf * |
---|
1866 | rsvg_pixbuf_from_file_at_size (const gchar *file_name, |
---|
1867 | gint width, |
---|
1868 | gint height, |
---|
1869 | GError **error) |
---|
1870 | { |
---|
1871 | FILE *f; |
---|
1872 | char chars[SVG_BUFFER_SIZE]; |
---|
1873 | gint result; |
---|
1874 | GdkPixbuf *retval; |
---|
1875 | RsvgHandle *handle; |
---|
1876 | struct RsvgSizeCallbackData data; |
---|
1877 | |
---|
1878 | f = fopen (file_name, "r"); |
---|
1879 | if (!f) |
---|
1880 | { |
---|
1881 | /* FIXME: Set up error. */ |
---|
1882 | return NULL; |
---|
1883 | } |
---|
1884 | handle = rsvg_handle_new (); |
---|
1885 | data.type = RSVG_SIZE_WH; |
---|
1886 | data.width = width; |
---|
1887 | data.height = height; |
---|
1888 | |
---|
1889 | rsvg_handle_set_size_callback (handle, rsvg_size_callback, &data, NULL); |
---|
1890 | while ((result = fread (chars, 1, SVG_BUFFER_SIZE, f)) > 0) |
---|
1891 | rsvg_handle_write (handle, chars, result, error); |
---|
1892 | |
---|
1893 | rsvg_handle_close (handle, error); |
---|
1894 | |
---|
1895 | retval = rsvg_handle_get_pixbuf (handle); |
---|
1896 | |
---|
1897 | fclose (f); |
---|
1898 | rsvg_handle_free (handle); |
---|
1899 | return retval; |
---|
1900 | } |
---|
1901 | |
---|
1902 | /** |
---|
1903 | * rsvg_pixbuf_from_file_at_max_size: |
---|
1904 | * @file_name: A file name |
---|
1905 | * @max_width: The requested max width |
---|
1906 | * @max_height: The requested max heigh |
---|
1907 | * @error: return location for errors |
---|
1908 | * |
---|
1909 | * Loads a new #GdkPixbuf from @file_name and returns it. This pixbuf is uniformly |
---|
1910 | * scaled so that the it fits into a rectangle of size max_width * max_height. The |
---|
1911 | * caller must assume the reference to the returned pixbuf. If an error occurred, |
---|
1912 | * @error is set and %NULL is returned. |
---|
1913 | * |
---|
1914 | * Return value: A newly allocated #GdkPixbuf, or %NULL |
---|
1915 | **/ |
---|
1916 | GdkPixbuf * |
---|
1917 | rsvg_pixbuf_from_file_at_max_size (const gchar *file_name, |
---|
1918 | gint max_width, |
---|
1919 | gint max_height, |
---|
1920 | GError **error) |
---|
1921 | { |
---|
1922 | FILE *f; |
---|
1923 | char chars[SVG_BUFFER_SIZE]; |
---|
1924 | gint result; |
---|
1925 | GdkPixbuf *retval; |
---|
1926 | RsvgHandle *handle; |
---|
1927 | struct RsvgSizeCallbackData data; |
---|
1928 | |
---|
1929 | f = fopen (file_name, "r"); |
---|
1930 | if (!f) |
---|
1931 | { |
---|
1932 | /* FIXME: Set up error. */ |
---|
1933 | return NULL; |
---|
1934 | } |
---|
1935 | handle = rsvg_handle_new (); |
---|
1936 | data.type = RSVG_SIZE_WH_MAX; |
---|
1937 | data.width = max_width; |
---|
1938 | data.height = max_height; |
---|
1939 | |
---|
1940 | rsvg_handle_set_size_callback (handle, rsvg_size_callback, &data, NULL); |
---|
1941 | while ((result = fread (chars, 1, SVG_BUFFER_SIZE, f)) > 0) |
---|
1942 | rsvg_handle_write (handle, chars, result, error); |
---|
1943 | |
---|
1944 | rsvg_handle_close (handle, error); |
---|
1945 | |
---|
1946 | retval = rsvg_handle_get_pixbuf (handle); |
---|
1947 | |
---|
1948 | fclose (f); |
---|
1949 | rsvg_handle_free (handle); |
---|
1950 | return retval; |
---|
1951 | } |
---|
1952 | |
---|
1953 | |
---|