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annotate src/graph_engine_cairo.c @ 868:f41ac71266bc

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Remove rdman pointer from structure of paints. Since a pointer of rdman is passed when calling free function of paint, this pointer can be removed.
author Thinker K.F. Li <thinker@codemud.net>
date Thu, 23 Sep 2010 10:51:25 +0800
parents 586e50f82c1f
children 74e3ba4d3fa1
rev   line source
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586e50f82c1f Unify coding style tag for emacs and vim.
Shih-Yuan Lee (FourDollars) <fourdollars@gmail.com>
parents: 480
diff changeset
1 // -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
586e50f82c1f Unify coding style tag for emacs and vim.
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parents: 480
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2 // vim: sw=4:ts=8:sts=4
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3 #include <fontconfig/fontconfig.h>
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4 #include <cairo-ft.h>
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5 #include "mb_graph_engine_cairo.h"
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6 #include "mb_shapes.h"
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7
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8 #ifndef ASSERT
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9 #define ASSERT(x)
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10 #endif
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11
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12 /*! \brief Find out a font pattern.
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13 *
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Thinker K.F. Li <thinker@branda.to>
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14 * This function use fontconfig to decide a font file in pattern. It can
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Thinker K.F. Li <thinker@branda.to>
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15 * replaced by other mechanism if you think it is not what you want.
d8181696b689 Move functions into graphic engine layers.
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16 *
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Thinker K.F. Li <thinker@branda.to>
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17 * \param slant make font prune if it it non-zero.
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18 * \param weight make font normal if it is 100.
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19 */
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20 static
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21 FcPattern *query_font_pattern(const char *family, int slant, int weight) {
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22 FcPattern *ptn, *p, *fn_ptn;
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23 FcValue val;
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24 FcConfig *cfg;
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25 FcBool r;
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26 FcResult result;
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27 static int slant_map[] = { /* from MB_FONT_SLANT_* to FC_SLANT_* */
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Thinker K.F. Li <thinker@branda.to>
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28 FC_SLANT_ROMAN,
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Thinker K.F. Li <thinker@branda.to>
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29 FC_SLANT_ROMAN,
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Thinker K.F. Li <thinker@branda.to>
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30 FC_SLANT_ITALIC,
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31 FC_SLANT_OBLIQUE};
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32
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33 cfg = FcConfigGetCurrent();
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34 ptn = FcPatternCreate();
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Thinker K.F. Li <thinker@branda.to>
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35 p = FcPatternCreate();
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36 if(ptn == NULL || p == NULL)
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37 goto err;
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38
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Thinker K.F. Li <thinker@branda.to>
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39 val.type = FcTypeString;
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Thinker K.F. Li <thinker@branda.to>
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40 val.u.s = family;
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Thinker K.F. Li <thinker@branda.to>
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41 FcPatternAdd(ptn, "family", val, FcTrue);
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parents: 480
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42
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43 val.type = FcTypeInteger;
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Thinker K.F. Li <thinker@branda.to>
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44 val.u.i = slant_map[slant];
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45 FcPatternAdd(ptn, "slant", val, FcTrue);
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586e50f82c1f Unify coding style tag for emacs and vim.
Shih-Yuan Lee (FourDollars) <fourdollars@gmail.com>
parents: 480
diff changeset
46
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47 val.type = FcTypeInteger;
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48 val.u.i = weight;
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49 FcPatternAdd(ptn, "weight", val, FcTrue);
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50
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51 r = FcConfigSubstituteWithPat(cfg, ptn, NULL, FcMatchPattern);
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52 if(!r)
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53 goto err;
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Shih-Yuan Lee (FourDollars) <fourdollars@gmail.com>
parents: 480
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54
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55 r = FcConfigSubstituteWithPat(cfg, p, ptn, FcMatchFont);
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56 if(!r)
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57 goto err;
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58
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59 FcDefaultSubstitute(p);
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60
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61 fn_ptn = FcFontMatch(cfg, p, &result);
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62
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63 /* It is supposed to return FcResultMatch. But, it is no, now.
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64 * I don't know why. Someone should figure out the issue.
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65 */
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66 #if 0
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67 if(result != FcResultMatch) {
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68 printf("%d %d\n", result, FcResultMatch);
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69 goto err;
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70 }
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71 #endif
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72 if(fn_ptn == NULL)
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73 goto err;
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74
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75 FcPatternDestroy(ptn);
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76 FcPatternDestroy(p);
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parents: 480
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77
465
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78 return fn_ptn;
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79
465
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80 err:
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81 if(ptn)
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82 FcPatternDestroy(ptn);
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83 if(p)
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84 FcPatternDestroy(p);
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85 return NULL;
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86
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87 }
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88
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89 /*! \brief Find out a font face for a pattern specified.
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90 *
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91 * The pattern, here, is a vector of family, slant, and weight.
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92 * This function base on fontconfig and cairo FreeType font supporting.
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93 * You can replace this function with other font mechanisms.
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94 */
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95 mbe_font_face_t *
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96 mbe_query_font_face(const char *family, int slant, int weight) {
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97 mbe_font_face_t *cface;
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98 FcPattern *ptn;
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parents: 480
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99
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100 ptn = query_font_pattern(family, slant, weight);
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4dc0be6c044a Add copy and clear graphic engine functions.
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101 cface = cairo_ft_font_face_create_for_pattern(ptn);
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102 FcPatternDestroy(ptn);
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103
465
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104 return cface;
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105 }
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106
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107 void
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108 mbe_free_font_face(mbe_font_face_t *face) {
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109 ASSERT(face == NULL);
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110
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111 mbe_font_face_destroy(face);
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112 }
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113
480
e813ac222f48 Merge add colors into constructor of gradient pattern.
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114 mbe_pattern_t *
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115 mbe_pattern_create_radial(co_aix cx0, co_aix cy0, co_aix radius0,
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116 co_aix cx1, co_aix cy1, co_aix radius1,
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parents: 469
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117 grad_stop_t *stops, int stop_cnt) {
e813ac222f48 Merge add colors into constructor of gradient pattern.
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parents: 469
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118 cairo_pattern_t *ptn;
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119 grad_stop_t *stop;
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120 int i;
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121
e813ac222f48 Merge add colors into constructor of gradient pattern.
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parents: 469
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122 ptn = cairo_pattern_create_radial(cx0, cy0, radius0,
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parents: 469
diff changeset
123 cx1, cy1, radius1);
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parents: 469
diff changeset
124 if(ptn == NULL)
e813ac222f48 Merge add colors into constructor of gradient pattern.
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parents: 469
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125 return NULL;
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126
480
e813ac222f48 Merge add colors into constructor of gradient pattern.
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127 stop = stops;
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parents: 469
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128 for(i = 0; i < stop_cnt; i++) {
e813ac222f48 Merge add colors into constructor of gradient pattern.
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parents: 469
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129 cairo_pattern_add_color_stop_rgba(ptn, stop->offset,
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parents: 469
diff changeset
130 stop->r, stop->g, stop->b, stop->a);
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131 stop++;
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parents: 469
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132 }
e813ac222f48 Merge add colors into constructor of gradient pattern.
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parents: 469
diff changeset
133
e813ac222f48 Merge add colors into constructor of gradient pattern.
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134 return ptn;
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parents: 469
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135 }
e813ac222f48 Merge add colors into constructor of gradient pattern.
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parents: 469
diff changeset
136
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
137 mbe_pattern_t *
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
138 mbe_pattern_create_linear(co_aix x0, co_aix y0, co_aix x1, co_aix y1,
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
139 grad_stop_t *stops, int stop_cnt) {
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
140 cairo_pattern_t *ptn;
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
141 grad_stop_t *stop;
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
142 int i;
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
143
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
144 ptn = cairo_pattern_create_linear(x0, y0, x1, y1);
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
145 if(ptn == NULL)
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
146 return NULL;
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
147
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
148 stop = stops;
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
149 for(i = 0; i < stop_cnt; i++) {
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
150 cairo_pattern_add_color_stop_rgba(ptn, stop->offset,
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
151 stop->r, stop->g, stop->b, stop->a);
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
152 stop++;
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
153 }
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
154
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
155 return ptn;
e813ac222f48 Merge add colors into constructor of gradient pattern.
Thinker K.F. Li <thinker@branda.to>
parents: 469
diff changeset
156 }