1 | /* vim: set sw=4: -*- Mode: C; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ |
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2 | /* |
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3 | rsvg-shapes.c: Draw SVG shapes |
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4 | |
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5 | Copyright (C) 2000 Eazel, Inc. |
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6 | Copyright (C) 2002 Dom Lachowicz <cinamod@hotmail.com> |
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7 | |
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8 | This program is free software; you can redistribute it and/or |
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9 | modify it under the terms of the GNU Library General Public License as |
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10 | published by the Free Software Foundation; either version 2 of the |
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11 | License, or (at your option) any later version. |
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12 | |
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13 | This program is distributed in the hope that it will be useful, |
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14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 | Library General Public License for more details. |
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17 | |
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18 | You should have received a copy of the GNU Library General Public |
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19 | License along with this program; if not, write to the |
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20 | Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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21 | Boston, MA 02111-1307, USA. |
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22 | |
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23 | Author: Raph Levien <raph@artofcode.com> |
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24 | */ |
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25 | #include <string.h> |
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26 | |
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27 | #include "rsvg-shapes.h" |
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28 | #include "rsvg-styles.h" |
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29 | #include "rsvg-css.h" |
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30 | #include "rsvg-private.h" |
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31 | #include "rsvg-bpath-util.h" |
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32 | #include "rsvg-path.h" |
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33 | |
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34 | #include <libart_lgpl/art_affine.h> |
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35 | #include <libart_lgpl/art_vpath_bpath.h> |
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36 | #include <libart_lgpl/art_render_svp.h> |
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37 | #include <libart_lgpl/art_svp_vpath.h> |
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38 | #include <libart_lgpl/art_svp_intersect.h> |
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39 | #include <libart_lgpl/art_svp_vpath.h> |
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40 | #include <libart_lgpl/art_rgb_affine.h> |
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41 | #include <libart_lgpl/art_rgb_rgba_affine.h> |
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42 | |
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43 | /* 4/3 * (1-cos 45)/sin 45 = 4/3 * sqrt(2) - 1 */ |
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44 | #define RSVG_ARC_MAGIC ((double) 0.5522847498) |
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45 | |
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46 | /** |
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47 | * rsvg_close_vpath: Close a vector path. |
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48 | * @src: Source vector path. |
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49 | * |
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50 | * Closes any open subpaths in the vector path. |
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51 | * |
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52 | * Return value: Closed vector path, allocated with g_new. |
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53 | **/ |
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54 | static ArtVpath * |
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55 | rsvg_close_vpath (const ArtVpath *src) |
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56 | { |
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57 | ArtVpath *result; |
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58 | int n_result, n_result_max; |
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59 | int src_ix; |
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60 | double beg_x, beg_y; |
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61 | gboolean open; |
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62 | |
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63 | n_result = 0; |
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64 | n_result_max = 16; |
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65 | result = g_new (ArtVpath, n_result_max); |
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66 | |
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67 | beg_x = 0; |
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68 | beg_y = 0; |
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69 | open = FALSE; |
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70 | |
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71 | for (src_ix = 0; src[src_ix].code != ART_END; src_ix++) |
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72 | { |
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73 | if (n_result == n_result_max) |
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74 | result = g_renew (ArtVpath, result, n_result_max <<= 1); |
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75 | result[n_result].code = src[src_ix].code == ART_MOVETO_OPEN ? |
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76 | ART_MOVETO : src[src_ix].code; |
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77 | result[n_result].x = src[src_ix].x; |
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78 | result[n_result].y = src[src_ix].y; |
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79 | n_result++; |
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80 | if (src[src_ix].code == ART_MOVETO_OPEN) |
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81 | { |
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82 | beg_x = src[src_ix].x; |
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83 | beg_y = src[src_ix].y; |
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84 | open = TRUE; |
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85 | } |
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86 | else if (src[src_ix + 1].code != ART_LINETO) |
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87 | { |
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88 | if (open && (beg_x != src[src_ix].x || beg_y != src[src_ix].y)) |
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89 | { |
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90 | if (n_result == n_result_max) |
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91 | result = g_renew (ArtVpath, result, n_result_max <<= 1); |
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92 | result[n_result].code = ART_LINETO; |
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93 | result[n_result].x = beg_x; |
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94 | result[n_result].y = beg_y; |
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95 | n_result++; |
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96 | } |
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97 | open = FALSE; |
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98 | } |
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99 | } |
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100 | if (n_result == n_result_max) |
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101 | result = g_renew (ArtVpath, result, n_result_max <<= 1); |
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102 | result[n_result].code = ART_END; |
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103 | result[n_result].x = 0.0; |
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104 | result[n_result].y = 0.0; |
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105 | return result; |
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106 | } |
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107 | |
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108 | /** |
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109 | * rsvg_render_svp: Render an SVP. |
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110 | * @ctx: Context in which to render. |
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111 | * @svp: SVP to render. |
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112 | * @ps: Paint server for rendering. |
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113 | * @opacity: Opacity as 0..0xff. |
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114 | * |
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115 | * Renders the SVP over the pixbuf in @ctx. |
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116 | **/ |
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117 | static void |
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118 | rsvg_render_svp (RsvgHandle *ctx, const ArtSVP *svp, |
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119 | RsvgPaintServer *ps, int opacity) |
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120 | { |
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121 | GdkPixbuf *pixbuf; |
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122 | ArtRender *render; |
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123 | gboolean has_alpha; |
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124 | |
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125 | pixbuf = ctx->pixbuf; |
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126 | if (pixbuf == NULL) |
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127 | { |
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128 | /* FIXME: What warning/GError here? */ |
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129 | return; |
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130 | } |
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131 | |
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132 | has_alpha = gdk_pixbuf_get_has_alpha (pixbuf); |
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133 | |
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134 | render = art_render_new (0, 0, |
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135 | gdk_pixbuf_get_width (pixbuf), |
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136 | gdk_pixbuf_get_height (pixbuf), |
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137 | gdk_pixbuf_get_pixels (pixbuf), |
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138 | gdk_pixbuf_get_rowstride (pixbuf), |
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139 | gdk_pixbuf_get_n_channels (pixbuf) - |
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140 | (has_alpha ? 1 : 0), |
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141 | gdk_pixbuf_get_bits_per_sample (pixbuf), |
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142 | has_alpha ? ART_ALPHA_SEPARATE : ART_ALPHA_NONE, |
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143 | NULL); |
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144 | |
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145 | art_render_svp (render, svp); |
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146 | art_render_mask_solid (render, (opacity << 8) + opacity + (opacity >> 7)); |
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147 | rsvg_render_paint_server (render, ps, NULL); /* todo: paint server ctx */ |
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148 | art_render_invoke (render); |
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149 | } |
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150 | |
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151 | static void |
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152 | rsvg_render_bpath (RsvgHandle *ctx, const ArtBpath *bpath) |
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153 | { |
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154 | RsvgState *state; |
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155 | ArtBpath *affine_bpath; |
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156 | ArtVpath *vpath; |
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157 | ArtSVP *svp; |
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158 | GdkPixbuf *pixbuf; |
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159 | gboolean need_tmpbuf; |
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160 | int opacity; |
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161 | int tmp; |
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162 | |
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163 | pixbuf = ctx->pixbuf; |
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164 | if (pixbuf == NULL) |
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165 | { |
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166 | /* FIXME: What warning/GError here? */ |
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167 | return; |
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168 | } |
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169 | |
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170 | state = &ctx->state[ctx->n_state - 1]; |
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171 | |
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172 | /* todo: handle visibility stuff earlier for performance benefits |
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173 | * handles all path based shapes. will handle text and images separately |
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174 | */ |
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175 | if (!state->visible) |
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176 | return; |
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177 | |
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178 | affine_bpath = art_bpath_affine_transform (bpath, |
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179 | state->affine); |
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180 | |
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181 | vpath = art_bez_path_to_vec (affine_bpath, 0.25); |
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182 | art_free (affine_bpath); |
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183 | |
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184 | need_tmpbuf = (state->fill != NULL) && (state->stroke != NULL) && |
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185 | state->opacity != 0xff; |
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186 | |
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187 | if (need_tmpbuf) |
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188 | rsvg_push_opacity_group (ctx); |
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189 | |
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190 | if (state->fill != NULL) |
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191 | { |
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192 | ArtVpath *closed_vpath; |
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193 | ArtSVP *svp2; |
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194 | ArtSvpWriter *swr; |
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195 | |
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196 | closed_vpath = rsvg_close_vpath (vpath); |
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197 | svp = art_svp_from_vpath (closed_vpath); |
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198 | g_free (closed_vpath); |
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199 | |
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200 | swr = art_svp_writer_rewind_new (ART_WIND_RULE_NONZERO); |
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201 | art_svp_intersector (svp, swr); |
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202 | |
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203 | svp2 = art_svp_writer_rewind_reap (swr); |
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204 | art_svp_free (svp); |
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205 | |
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206 | opacity = state->fill_opacity; |
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207 | if (!need_tmpbuf && state->opacity != 0xff) |
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208 | { |
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209 | tmp = opacity * state->opacity + 0x80; |
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210 | opacity = (tmp + (tmp >> 8)) >> 8; |
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211 | } |
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212 | rsvg_render_svp (ctx, svp2, state->fill, opacity); |
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213 | art_svp_free (svp2); |
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214 | } |
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215 | |
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216 | if (state->stroke != NULL) |
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217 | { |
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218 | /* todo: libart doesn't yet implement anamorphic scaling of strokes */ |
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219 | double stroke_width = state->stroke_width * |
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220 | art_affine_expansion (state->affine); |
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221 | |
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222 | if (stroke_width < 0.25) |
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223 | stroke_width = 0.25; |
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224 | |
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225 | /* if the path is dashed, stroke it */ |
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226 | if (state->dash.n_dash > 0) |
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227 | { |
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228 | ArtVpath * dashed_vpath = art_vpath_dash (vpath, &state->dash); |
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229 | art_free (vpath); |
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230 | vpath = dashed_vpath; |
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231 | } |
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232 | |
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233 | svp = art_svp_vpath_stroke (vpath, state->join, state->cap, |
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234 | stroke_width, state->miter_limit, 0.25); |
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235 | opacity = state->stroke_opacity; |
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236 | if (!need_tmpbuf && state->opacity != 0xff) |
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237 | { |
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238 | tmp = opacity * state->opacity + 0x80; |
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239 | opacity = (tmp + (tmp >> 8)) >> 8; |
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240 | } |
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241 | rsvg_render_svp (ctx, svp, state->stroke, opacity); |
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242 | art_svp_free (svp); |
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243 | } |
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244 | |
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245 | if (need_tmpbuf) |
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246 | rsvg_pop_opacity_group (ctx, state->opacity); |
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247 | |
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248 | art_free (vpath); |
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249 | } |
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250 | |
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251 | void |
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252 | rsvg_render_path(RsvgHandle *ctx, const char *d) |
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253 | { |
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254 | RsvgBpathDef *bpath_def; |
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255 | |
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256 | bpath_def = rsvg_parse_path (d); |
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257 | rsvg_bpath_def_art_finish (bpath_def); |
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258 | |
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259 | rsvg_render_bpath (ctx, bpath_def->bpath); |
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260 | |
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261 | rsvg_bpath_def_free (bpath_def); |
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262 | } |
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263 | |
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264 | void |
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265 | rsvg_start_path (RsvgHandle *ctx, const xmlChar **atts) |
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266 | { |
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267 | int i; |
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268 | char *d = NULL; |
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269 | const char * klazz = NULL, * id = NULL; |
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270 | |
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271 | /* skip over defs entries for now */ |
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272 | if (ctx->in_defs) return; |
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273 | |
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274 | if (atts != NULL) |
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275 | { |
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276 | for (i = 0; atts[i] != NULL; i += 2) |
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277 | { |
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278 | if (!strcmp ((char *)atts[i], "d")) |
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279 | d = (char *)atts[i + 1]; |
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280 | else if (!strcmp ((char *)atts[i], "class")) |
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281 | klazz = (char *)atts[i + 1]; |
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282 | else if (!strcmp ((char *)atts[i], "id")) |
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283 | id = (const char *)atts[i + 1]; |
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284 | } |
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285 | } |
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286 | |
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287 | if (d == NULL) |
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288 | return; |
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289 | |
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290 | rsvg_parse_style_attrs (ctx, "path", klazz, id, atts); |
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291 | rsvg_render_path (ctx, d); |
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292 | } |
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293 | |
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294 | static GString * |
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295 | rsvg_make_poly_point_list(const char * points) |
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296 | { |
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297 | guint idx = 0, size = strlen(points); |
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298 | GString * str = g_string_sized_new (size); |
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299 | |
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300 | while (idx < size) |
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301 | { |
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302 | /* scan for first point */ |
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303 | while (!g_ascii_isdigit (points[idx]) && (points[idx] != '.') |
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304 | && (points[idx] != '-') && (idx < size)) |
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305 | idx++; |
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306 | |
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307 | /* now build up the point list (everything until next letter!) */ |
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308 | if (idx < size && points[idx] == '-') |
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309 | g_string_append_c (str, points[idx++]); /* handle leading '-' */ |
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310 | while ((g_ascii_isdigit (points[idx]) || (points[idx] == '.')) && (idx < size)) |
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311 | g_string_append_c (str, points[idx++]); |
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312 | |
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313 | g_string_append_c (str, ' '); |
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314 | } |
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315 | |
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316 | return str; |
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317 | } |
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318 | |
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319 | static void |
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320 | rsvg_start_any_poly(RsvgHandle *ctx, const xmlChar **atts, gboolean is_polyline) |
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321 | { |
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322 | /* the only difference between polygon and polyline is |
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323 | that a polyline closes the path */ |
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324 | |
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325 | int i; |
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326 | const char * verts = (const char *)NULL; |
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327 | GString * g = NULL; |
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328 | gchar ** pointlist = NULL; |
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329 | const char * klazz = NULL, * id = NULL; |
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330 | |
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331 | /* skip over defs entries for now */ |
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332 | if (ctx->in_defs) return; |
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333 | |
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334 | if (atts != NULL) |
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335 | { |
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336 | for (i = 0; atts[i] != NULL; i += 2) |
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337 | { |
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338 | /* support for svg < 1.0 which used verts */ |
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339 | if (!strcmp ((char *)atts[i], "verts") || !strcmp ((char *)atts[i], "points")) |
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340 | verts = (const char *)atts[i + 1]; |
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341 | else if (!strcmp ((char *)atts[i], "class")) |
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342 | klazz = (const char *)atts[i + 1]; |
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343 | else if (!strcmp ((char *)atts[i], "id")) |
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344 | id = (const char *)atts[i + 1]; |
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345 | } |
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346 | } |
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347 | |
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348 | if (!verts) |
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349 | return; |
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350 | |
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351 | rsvg_parse_style_attrs (ctx, (is_polyline ? "polyline" : "polygon"), klazz, id, atts); |
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352 | |
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353 | /* todo: make the following more memory and CPU friendly */ |
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354 | g = rsvg_make_poly_point_list (verts); |
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355 | pointlist = g_strsplit (g->str, " ", -1); |
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356 | g_string_free (g, TRUE); |
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357 | |
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358 | /* represent as a "moveto, lineto*, close" path */ |
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359 | if (pointlist) |
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360 | { |
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361 | GString * d = g_string_sized_new (strlen(verts)); |
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362 | g_string_append_printf (d, "M %s %s ", pointlist[0], pointlist[1] ); |
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363 | |
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364 | for (i = 2; pointlist[i] != NULL && pointlist[i][0] != '\0'; i += 2) |
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365 | g_string_append_printf (d, "L %s %s ", pointlist[i], pointlist[i+1]); |
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366 | |
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367 | if (!is_polyline) |
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368 | g_string_append (d, "Z"); |
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369 | |
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370 | rsvg_render_path (ctx, d->str); |
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371 | g_string_free (d, TRUE); |
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372 | g_strfreev(pointlist); |
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373 | } |
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374 | } |
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375 | |
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376 | void |
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377 | rsvg_start_polygon (RsvgHandle *ctx, const xmlChar **atts) |
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378 | { |
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379 | rsvg_start_any_poly (ctx, atts, FALSE); |
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380 | } |
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381 | |
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382 | void |
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383 | rsvg_start_polyline (RsvgHandle *ctx, const xmlChar **atts) |
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384 | { |
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385 | rsvg_start_any_poly (ctx, atts, TRUE); |
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386 | } |
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387 | |
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388 | void |
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389 | rsvg_start_line (RsvgHandle *ctx, const xmlChar **atts) |
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390 | { |
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391 | int i; |
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392 | double x1 = 0, y1 = 0, x2 = 0, y2 = 0; |
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393 | GString * d = NULL; |
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394 | const char * klazz = NULL, * id = NULL; |
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395 | RsvgState *state; |
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396 | char buf [G_ASCII_DTOSTR_BUF_SIZE]; |
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397 | |
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398 | /* skip over defs entries for now */ |
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399 | if (ctx->in_defs) return; |
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400 | |
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401 | state = &ctx->state[ctx->n_state - 1]; |
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402 | |
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403 | if (atts != NULL) |
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404 | { |
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405 | for (i = 0; atts[i] != NULL; i += 2) |
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406 | { |
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407 | if (!strcmp ((char *)atts[i], "x1")) |
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408 | x1 = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->width, state->font_size); |
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409 | else if (!strcmp ((char *)atts[i], "y1")) |
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410 | y1 = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->height, state->font_size); |
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411 | if (!strcmp ((char *)atts[i], "x2")) |
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412 | x2 = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->width, state->font_size); |
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413 | else if (!strcmp ((char *)atts[i], "y2")) |
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414 | y2 = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->height, state->font_size); |
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415 | else if (!strcmp ((char *)atts[i], "class")) |
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416 | klazz = (const char *)atts[i + 1]; |
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417 | else if (!strcmp ((char *)atts[i], "id")) |
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418 | id = (const char *)atts[i + 1]; |
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419 | } |
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420 | } |
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421 | rsvg_parse_style_attrs (ctx, "line", klazz, id, atts); |
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422 | |
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423 | /* emulate a line using a path */ |
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424 | /* ("M %f %f L %f %f", x1, y1, x2, y2) */ |
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425 | d = g_string_new ("M "); |
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426 | |
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427 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), x1)); |
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428 | g_string_append_c (d, ' '); |
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429 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), y1)); |
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430 | g_string_append (d, " L "); |
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431 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), x2)); |
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432 | g_string_append_c (d, ' '); |
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433 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), y2)); |
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434 | |
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435 | rsvg_render_path (ctx, d->str); |
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436 | g_string_free (d, TRUE); |
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437 | } |
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438 | |
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439 | void |
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440 | rsvg_start_rect (RsvgHandle *ctx, const xmlChar **atts) |
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441 | { |
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442 | int i; |
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443 | double x = -1, y = -1, w = -1, h = -1, rx = 0., ry = 0.; |
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444 | GString * d = NULL; |
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445 | const char * klazz = NULL, * id = NULL; |
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446 | RsvgState *state; |
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447 | char buf [G_ASCII_DTOSTR_BUF_SIZE]; |
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448 | gboolean got_rx = FALSE, got_ry = FALSE; |
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449 | |
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450 | /* skip over defs entries for now */ |
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451 | if (ctx->in_defs) return; |
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452 | |
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453 | state = &ctx->state[ctx->n_state - 1]; |
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454 | |
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455 | if (atts != NULL) |
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456 | { |
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457 | for (i = 0; atts[i] != NULL; i += 2) |
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458 | { |
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459 | if (!strcmp ((char *)atts[i], "x")) |
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460 | x = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->width, state->font_size); |
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461 | else if (!strcmp ((char *)atts[i], "y")) |
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462 | y = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->height, state->font_size); |
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463 | else if (!strcmp ((char *)atts[i], "width")) |
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464 | w = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->width, state->font_size); |
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465 | else if (!strcmp ((char *)atts[i], "height")) |
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466 | h = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->height, state->font_size); |
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467 | else if (!strcmp ((char *)atts[i], "rx")) { |
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468 | rx = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->width, state->font_size); |
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469 | got_rx = TRUE; |
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470 | } |
---|
471 | else if (!strcmp ((char *)atts[i], "ry")) { |
---|
472 | ry = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->height, state->font_size); |
---|
473 | got_ry = TRUE; |
---|
474 | } |
---|
475 | else if (!strcmp ((char *)atts[i], "class")) |
---|
476 | klazz = (const char *)atts[i + 1]; |
---|
477 | else if (!strcmp ((char *)atts[i], "id")) |
---|
478 | id = (const char *)atts[i + 1]; |
---|
479 | } |
---|
480 | } |
---|
481 | |
---|
482 | if (got_rx && !got_ry) |
---|
483 | ry = rx; |
---|
484 | else if (got_ry && !got_rx) |
---|
485 | rx = ry; |
---|
486 | |
---|
487 | if (x < 0. || y < 0. || w < 0. || h < 0. || rx < 0. || ry < 0.) |
---|
488 | return; |
---|
489 | |
---|
490 | rsvg_parse_style_attrs (ctx, "rect", klazz, id, atts); |
---|
491 | |
---|
492 | /* incrementing y by 1 properly draws borders. this is a HACK */ |
---|
493 | y += 1.; |
---|
494 | |
---|
495 | /* emulate a rect using a path */ |
---|
496 | |
---|
497 | d = g_string_new ("M "); |
---|
498 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), x + rx)); |
---|
499 | g_string_append_c (d, ' '); |
---|
500 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), y)); |
---|
501 | |
---|
502 | g_string_append (d, " H "); |
---|
503 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), x + w - rx)); |
---|
504 | |
---|
505 | g_string_append (d, " A"); |
---|
506 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), rx)); |
---|
507 | g_string_append_c (d, ' '); |
---|
508 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), ry)); |
---|
509 | g_string_append_c (d, ' '); |
---|
510 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), 0.)); |
---|
511 | g_string_append_c (d, ' '); |
---|
512 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), 0.)); |
---|
513 | g_string_append_c (d, ' '); |
---|
514 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), 1.)); |
---|
515 | g_string_append_c (d, ' '); |
---|
516 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), x+w)); |
---|
517 | g_string_append_c (d, ' '); |
---|
518 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), y+ry)); |
---|
519 | |
---|
520 | g_string_append (d, " V "); |
---|
521 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), y+h-ry)); |
---|
522 | |
---|
523 | g_string_append (d, " A"); |
---|
524 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), rx)); |
---|
525 | g_string_append_c (d, ' '); |
---|
526 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), ry)); |
---|
527 | g_string_append_c (d, ' '); |
---|
528 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), 0.)); |
---|
529 | g_string_append_c (d, ' '); |
---|
530 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), 0.)); |
---|
531 | g_string_append_c (d, ' '); |
---|
532 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), 1.)); |
---|
533 | g_string_append_c (d, ' '); |
---|
534 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), x + w - rx)); |
---|
535 | g_string_append_c (d, ' '); |
---|
536 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), y + h)); |
---|
537 | |
---|
538 | g_string_append (d, " H "); |
---|
539 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), x + rx)); |
---|
540 | |
---|
541 | g_string_append (d, " A"); |
---|
542 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), rx)); |
---|
543 | g_string_append_c (d, ' '); |
---|
544 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), ry)); |
---|
545 | g_string_append_c (d, ' '); |
---|
546 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), 0.)); |
---|
547 | g_string_append_c (d, ' '); |
---|
548 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), 0.)); |
---|
549 | g_string_append_c (d, ' '); |
---|
550 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), 1.)); |
---|
551 | g_string_append_c (d, ' '); |
---|
552 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), x)); |
---|
553 | g_string_append_c (d, ' '); |
---|
554 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), y + h - ry)); |
---|
555 | |
---|
556 | g_string_append (d, " V "); |
---|
557 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), y+ry)); |
---|
558 | |
---|
559 | g_string_append (d, " A"); |
---|
560 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), rx)); |
---|
561 | g_string_append_c (d, ' '); |
---|
562 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), ry)); |
---|
563 | g_string_append_c (d, ' '); |
---|
564 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), 0.)); |
---|
565 | g_string_append_c (d, ' '); |
---|
566 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), 0.)); |
---|
567 | g_string_append_c (d, ' '); |
---|
568 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), 1.)); |
---|
569 | g_string_append_c (d, ' '); |
---|
570 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), x+rx)); |
---|
571 | g_string_append_c (d, ' '); |
---|
572 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), y)); |
---|
573 | |
---|
574 | rsvg_render_path (ctx, d->str); |
---|
575 | g_string_free (d, TRUE); |
---|
576 | } |
---|
577 | |
---|
578 | void |
---|
579 | rsvg_start_circle (RsvgHandle *ctx, const xmlChar **atts) |
---|
580 | { |
---|
581 | int i; |
---|
582 | double cx = 0, cy = 0, r = 0; |
---|
583 | GString * d = NULL; |
---|
584 | const char * klazz = NULL, * id = NULL; |
---|
585 | RsvgState *state; |
---|
586 | char buf [G_ASCII_DTOSTR_BUF_SIZE]; |
---|
587 | |
---|
588 | /* skip over defs entries for now */ |
---|
589 | if (ctx->in_defs) return; |
---|
590 | |
---|
591 | state = &ctx->state[ctx->n_state - 1]; |
---|
592 | |
---|
593 | if (atts != NULL) |
---|
594 | { |
---|
595 | for (i = 0; atts[i] != NULL; i += 2) |
---|
596 | { |
---|
597 | if (!strcmp ((char *)atts[i], "cx")) |
---|
598 | cx = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->width, state->font_size); |
---|
599 | else if (!strcmp ((char *)atts[i], "cy")) |
---|
600 | cy = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->height, state->font_size); |
---|
601 | else if (!strcmp ((char *)atts[i], "r")) |
---|
602 | r = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, |
---|
603 | rsvg_viewport_percentage((gdouble)ctx->width, (gdouble)ctx->height), |
---|
604 | state->font_size); |
---|
605 | else if (!strcmp ((char *)atts[i], "class")) |
---|
606 | klazz = (const char *)atts[i + 1]; |
---|
607 | else if (!strcmp ((char *)atts[i], "id")) |
---|
608 | id = (const char *)atts[i + 1]; |
---|
609 | } |
---|
610 | } |
---|
611 | |
---|
612 | if (cx < 0. || cy < 0. || r <= 0.) |
---|
613 | return; |
---|
614 | |
---|
615 | rsvg_parse_style_attrs (ctx, "circle", klazz, id, atts); |
---|
616 | |
---|
617 | /* approximate a circle using 4 bezier curves */ |
---|
618 | |
---|
619 | d = g_string_new ("M "); |
---|
620 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx+r)); |
---|
621 | g_string_append_c (d, ' '); |
---|
622 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy)); |
---|
623 | |
---|
624 | g_string_append (d, " C "); |
---|
625 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx+r)); |
---|
626 | g_string_append_c (d, ' '); |
---|
627 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy + r * RSVG_ARC_MAGIC)); |
---|
628 | g_string_append_c (d, ' '); |
---|
629 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx + r * RSVG_ARC_MAGIC)); |
---|
630 | g_string_append_c (d, ' '); |
---|
631 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy + r)); |
---|
632 | g_string_append_c (d, ' '); |
---|
633 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx)); |
---|
634 | g_string_append_c (d, ' '); |
---|
635 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy + r)); |
---|
636 | |
---|
637 | g_string_append (d, " C "); |
---|
638 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx - r * RSVG_ARC_MAGIC)); |
---|
639 | g_string_append_c (d, ' '); |
---|
640 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy + r)); |
---|
641 | g_string_append_c (d, ' '); |
---|
642 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx - r)); |
---|
643 | g_string_append_c (d, ' '); |
---|
644 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy + r * RSVG_ARC_MAGIC)); |
---|
645 | g_string_append_c (d, ' '); |
---|
646 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx - r)); |
---|
647 | g_string_append_c (d, ' '); |
---|
648 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy)); |
---|
649 | |
---|
650 | g_string_append (d, " C "); |
---|
651 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx - r)); |
---|
652 | g_string_append_c (d, ' '); |
---|
653 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy - r * RSVG_ARC_MAGIC)); |
---|
654 | g_string_append_c (d, ' '); |
---|
655 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx - r * RSVG_ARC_MAGIC)); |
---|
656 | g_string_append_c (d, ' '); |
---|
657 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy - r)); |
---|
658 | g_string_append_c (d, ' '); |
---|
659 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx)); |
---|
660 | g_string_append_c (d, ' '); |
---|
661 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy - r)); |
---|
662 | |
---|
663 | g_string_append (d, " C "); |
---|
664 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx + r * RSVG_ARC_MAGIC)); |
---|
665 | g_string_append_c (d, ' '); |
---|
666 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy - r)); |
---|
667 | g_string_append_c (d, ' '); |
---|
668 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx + r)); |
---|
669 | g_string_append_c (d, ' '); |
---|
670 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy - r * RSVG_ARC_MAGIC)); |
---|
671 | g_string_append_c (d, ' '); |
---|
672 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx + r)); |
---|
673 | g_string_append_c (d, ' '); |
---|
674 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy)); |
---|
675 | |
---|
676 | g_string_append (d, " Z"); |
---|
677 | |
---|
678 | rsvg_render_path (ctx, d->str); |
---|
679 | g_string_free (d, TRUE); |
---|
680 | } |
---|
681 | |
---|
682 | void |
---|
683 | rsvg_start_ellipse (RsvgHandle *ctx, const xmlChar **atts) |
---|
684 | { |
---|
685 | int i; |
---|
686 | double cx = 0, cy = 0, rx = 0, ry = 0; |
---|
687 | GString * d = NULL; |
---|
688 | const char * klazz = NULL, * id = NULL; |
---|
689 | RsvgState *state; |
---|
690 | char buf [G_ASCII_DTOSTR_BUF_SIZE]; |
---|
691 | |
---|
692 | /* skip over defs entries for now */ |
---|
693 | if (ctx->in_defs) return; |
---|
694 | |
---|
695 | state = &ctx->state[ctx->n_state - 1]; |
---|
696 | |
---|
697 | if (atts != NULL) |
---|
698 | { |
---|
699 | for (i = 0; atts[i] != NULL; i += 2) |
---|
700 | { |
---|
701 | if (!strcmp ((char *)atts[i], "cx")) |
---|
702 | cx = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->width, state->font_size); |
---|
703 | else if (!strcmp ((char *)atts[i], "cy")) |
---|
704 | cy = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->height, state->font_size); |
---|
705 | else if (!strcmp ((char *)atts[i], "rx")) |
---|
706 | rx = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->width, state->font_size); |
---|
707 | else if (!strcmp ((char *)atts[i], "ry")) |
---|
708 | ry = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->height, state->font_size); |
---|
709 | else if (!strcmp ((char *)atts[i], "class")) |
---|
710 | klazz = (const char *)atts[i + 1]; |
---|
711 | else if (!strcmp ((char *)atts[i], "id")) |
---|
712 | id = (const char *)atts[i + 1]; |
---|
713 | } |
---|
714 | } |
---|
715 | |
---|
716 | if (cx < 0. || cy < 0. || rx <= 0. || ry <= 0.) |
---|
717 | return; |
---|
718 | |
---|
719 | rsvg_parse_style_attrs (ctx, "ellipse", klazz, id, atts); |
---|
720 | |
---|
721 | /* approximate an ellipse using 4 bezier curves */ |
---|
722 | |
---|
723 | d = g_string_new ("M "); |
---|
724 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx + rx)); |
---|
725 | g_string_append_c (d, ' '); |
---|
726 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy)); |
---|
727 | |
---|
728 | g_string_append (d, " C "); |
---|
729 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx + rx)); |
---|
730 | g_string_append_c (d, ' '); |
---|
731 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy - RSVG_ARC_MAGIC * ry)); |
---|
732 | g_string_append_c (d, ' '); |
---|
733 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx + RSVG_ARC_MAGIC * rx)); |
---|
734 | g_string_append_c (d, ' '); |
---|
735 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy - ry)); |
---|
736 | g_string_append_c (d, ' '); |
---|
737 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx)); |
---|
738 | g_string_append_c (d, ' '); |
---|
739 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy - ry)); |
---|
740 | |
---|
741 | g_string_append (d, " C "); |
---|
742 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx - RSVG_ARC_MAGIC * rx)); |
---|
743 | g_string_append_c (d, ' '); |
---|
744 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy - ry)); |
---|
745 | g_string_append_c (d, ' '); |
---|
746 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx - rx)); |
---|
747 | g_string_append_c (d, ' '); |
---|
748 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy - RSVG_ARC_MAGIC * ry)); |
---|
749 | g_string_append_c (d, ' '); |
---|
750 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx - rx)); |
---|
751 | g_string_append_c (d, ' '); |
---|
752 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy)); |
---|
753 | |
---|
754 | g_string_append (d, " C "); |
---|
755 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx - rx)); |
---|
756 | g_string_append_c (d, ' '); |
---|
757 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy + RSVG_ARC_MAGIC * ry)); |
---|
758 | g_string_append_c (d, ' '); |
---|
759 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx - RSVG_ARC_MAGIC * rx)); |
---|
760 | g_string_append_c (d, ' '); |
---|
761 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy + ry)); |
---|
762 | g_string_append_c (d, ' '); |
---|
763 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx)); |
---|
764 | g_string_append_c (d, ' '); |
---|
765 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy + ry)); |
---|
766 | |
---|
767 | g_string_append (d, " C "); |
---|
768 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx + RSVG_ARC_MAGIC * rx)); |
---|
769 | g_string_append_c (d, ' '); |
---|
770 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy + ry)); |
---|
771 | g_string_append_c (d, ' '); |
---|
772 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx + rx)); |
---|
773 | g_string_append_c (d, ' '); |
---|
774 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy + RSVG_ARC_MAGIC * ry)); |
---|
775 | g_string_append_c (d, ' '); |
---|
776 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cx + rx)); |
---|
777 | g_string_append_c (d, ' '); |
---|
778 | g_string_append (d, g_ascii_dtostr (buf, sizeof (buf), cy)); |
---|
779 | |
---|
780 | g_string_append (d, " Z"); |
---|
781 | |
---|
782 | rsvg_render_path (ctx, d->str); |
---|
783 | g_string_free (d, TRUE); |
---|
784 | } |
---|
785 | |
---|
786 | /* TODO 1: issue with affining alpha images - this is gdkpixbuf's fault... |
---|
787 | * TODO 2: issue with rotating images - do we want to rotate the whole |
---|
788 | * canvas 2x to get this right, only to have #1 bite us? |
---|
789 | */ |
---|
790 | void |
---|
791 | rsvg_start_image (RsvgHandle *ctx, const xmlChar **atts) |
---|
792 | { |
---|
793 | int i; |
---|
794 | double x = 0., y = 0., w = -1., h = -1.; |
---|
795 | const char * href = NULL; |
---|
796 | const char * klazz = NULL, * id = NULL; |
---|
797 | |
---|
798 | GdkPixbuf *img; |
---|
799 | GError *err = NULL; |
---|
800 | |
---|
801 | gboolean has_alpha; |
---|
802 | guchar *rgb = NULL; |
---|
803 | int dest_rowstride; |
---|
804 | double tmp_affine[6]; |
---|
805 | RsvgState *state; |
---|
806 | |
---|
807 | /* skip over defs entries for now */ |
---|
808 | if (ctx->in_defs) return; |
---|
809 | |
---|
810 | state = &ctx->state[ctx->n_state - 1]; |
---|
811 | |
---|
812 | if (atts != NULL) |
---|
813 | { |
---|
814 | for (i = 0; atts[i] != NULL; i += 2) |
---|
815 | { |
---|
816 | if (!strcmp ((char *)atts[i], "x")) |
---|
817 | x = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->width, state->font_size); |
---|
818 | else if (!strcmp ((char *)atts[i], "y")) |
---|
819 | y = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->height, state->font_size); |
---|
820 | else if (!strcmp ((char *)atts[i], "width")) |
---|
821 | w = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->width, state->font_size); |
---|
822 | else if (!strcmp ((char *)atts[i], "height")) |
---|
823 | h = rsvg_css_parse_normalized_length ((char *)atts[i + 1], ctx->dpi, (gdouble)ctx->height, state->font_size); |
---|
824 | /* path is used by some older adobe illustrator versions */ |
---|
825 | else if (!strcmp ((char *)atts[i], "path") || !strcmp((char *)atts[i], "xlink:href")) |
---|
826 | href = (const char *)atts[i + 1]; |
---|
827 | else if (!strcmp ((char *)atts[i], "class")) |
---|
828 | klazz = (const char *)atts[i + 1]; |
---|
829 | else if (!strcmp ((char *)atts[i], "id")) |
---|
830 | id = (const char *)atts[i + 1]; |
---|
831 | } |
---|
832 | } |
---|
833 | |
---|
834 | if (!href || x < 0. || y < 0. || w <= 0. || h <= 0.) |
---|
835 | return; |
---|
836 | |
---|
837 | rsvg_parse_style_attrs (ctx, "image", klazz, id, atts); |
---|
838 | |
---|
839 | /* figure out if image is visible or not */ |
---|
840 | if (!state->visible) |
---|
841 | return; |
---|
842 | |
---|
843 | img = gdk_pixbuf_new_from_file (href, &err); |
---|
844 | |
---|
845 | if (!img) |
---|
846 | { |
---|
847 | if (err) |
---|
848 | { |
---|
849 | g_warning ("Couldn't load pixbuf (%s): %s\n", href, err->message); |
---|
850 | g_error_free (err); |
---|
851 | } |
---|
852 | return; |
---|
853 | } |
---|
854 | |
---|
855 | /* scale/resize the dest image */ |
---|
856 | art_affine_scale (tmp_affine, (double)w / (double)gdk_pixbuf_get_width (img), |
---|
857 | (double)h / (double)gdk_pixbuf_get_height (img)); |
---|
858 | art_affine_multiply (state->affine, tmp_affine, state->affine); |
---|
859 | |
---|
860 | has_alpha = gdk_pixbuf_get_has_alpha (img); |
---|
861 | dest_rowstride = (int)(w * (has_alpha ? 4 : 3) + 3) & ~3; |
---|
862 | rgb = g_new (guchar, h * dest_rowstride); |
---|
863 | |
---|
864 | if(has_alpha) |
---|
865 | art_rgb_rgba_affine (rgb, 0, 0, w, h, dest_rowstride, |
---|
866 | gdk_pixbuf_get_pixels (img), |
---|
867 | gdk_pixbuf_get_width (img), |
---|
868 | gdk_pixbuf_get_height (img), |
---|
869 | gdk_pixbuf_get_rowstride (img), |
---|
870 | state->affine, |
---|
871 | ART_FILTER_NEAREST, |
---|
872 | NULL); |
---|
873 | else |
---|
874 | art_rgb_affine (rgb, 0, 0, w, h, dest_rowstride, |
---|
875 | gdk_pixbuf_get_pixels (img), |
---|
876 | gdk_pixbuf_get_width (img), |
---|
877 | gdk_pixbuf_get_height (img), |
---|
878 | gdk_pixbuf_get_rowstride (img), |
---|
879 | state->affine, |
---|
880 | ART_FILTER_NEAREST, |
---|
881 | NULL); |
---|
882 | |
---|
883 | g_object_unref (G_OBJECT (img)); |
---|
884 | img = gdk_pixbuf_new_from_data (rgb, GDK_COLORSPACE_RGB, has_alpha, 8, w, h, dest_rowstride, NULL, NULL); |
---|
885 | |
---|
886 | if (!img) |
---|
887 | { |
---|
888 | g_free (rgb); |
---|
889 | return; |
---|
890 | } |
---|
891 | |
---|
892 | gdk_pixbuf_copy_area (img, 0, 0, |
---|
893 | gdk_pixbuf_get_width (img) * state->affine[0], |
---|
894 | gdk_pixbuf_get_height (img) * state->affine[3], |
---|
895 | ctx->pixbuf, |
---|
896 | state->affine[4] + x, |
---|
897 | state->affine[5] + y); |
---|
898 | |
---|
899 | g_object_unref (G_OBJECT (img)); |
---|
900 | g_free (rgb); |
---|
901 | } |
---|