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annotate src/shape_stext.c @ 394:b3d5ce48670a

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Use fontconfig to find out a font for a family/slant/weight pattern
author Thinker K.F. Li <thinker@branda.to>
date Wed, 10 Jun 2009 08:16:04 +0800
parents 27774b93521e
children d30b575a4ad4
rev   line source
394
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
Thinker K.F. Li <thinker@branda.to>
parents: 393
diff changeset
1 #if 0
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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parents: 393
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2
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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parents:
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3 #include <stdio.h>
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
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4 #include <cairo.h>
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b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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parents: 393
diff changeset
5 #include <cairo-ft.h>
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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parents: 393
diff changeset
6 #include <fontconfig/fontconfig.h>
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
7 #include "mb_shapes.h"
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
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8
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
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9 #ifndef ASSERT
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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parents:
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10 #define ASSERT(x)
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
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11 #endif
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
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12 #define OK 0
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
13 #define ERR -1
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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parents:
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14
394
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
Thinker K.F. Li <thinker@branda.to>
parents: 393
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15 static
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
Thinker K.F. Li <thinker@branda.to>
parents: 393
diff changeset
16 FcPattern *query_fontconfig(const char *family, int slant, int weight) {
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
Thinker K.F. Li <thinker@branda.to>
parents: 393
diff changeset
17 FcPattern *ptn, *p;
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
Thinker K.F. Li <thinker@branda.to>
parents: 393
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18 FcValue val;
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
Thinker K.F. Li <thinker@branda.to>
parents: 393
diff changeset
19 FcConfig *cfg;
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
Thinker K.F. Li <thinker@branda.to>
parents: 393
diff changeset
20 FcBool r;
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
Thinker K.F. Li <thinker@branda.to>
parents: 393
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21 static int slant_map[] = { /* from MB_FONT_SLANT_* to FC_SLANT_* */
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
Thinker K.F. Li <thinker@branda.to>
parents: 393
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22 FC_SLANT_ROMAN,
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
Thinker K.F. Li <thinker@branda.to>
parents: 393
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23 FC_SLANT_ROMAN,
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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parents: 393
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24 FC_SLANT_ITALIC,
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
Thinker K.F. Li <thinker@branda.to>
parents: 393
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25 FC_SLANT_OBLIQUE};
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parents: 393
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26
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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diff changeset
27 cfg = FcConfigGetCurrent();
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
Thinker K.F. Li <thinker@branda.to>
parents: 393
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28 ptn = FcPatternCreate();
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
Thinker K.F. Li <thinker@branda.to>
parents: 393
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29 p = FcPatternCreate();
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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parents: 393
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30 if(ptn == NULL || p == NULL)
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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31 goto err;
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parents: 393
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32
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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33 val.type = FcTypeString;
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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34 val.u.s = family;
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35 FcPatternAdd(ptn, "family", &val, FcTrue);
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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36
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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37 val.type = FcTypeInteger;
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38 val.u.i = slant_map[slant];
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39 FcPatternAdd(ptn, "slant", &val, FcTrue);
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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diff changeset
40
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41 val.type = FcTypeInteger;
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42 val.u.i = weight;
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43 FcPatternAdd(ptn, "weight", &val, FcTrue);
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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44
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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45 r = FcConfigSubstituteWithPat(cfg, ptn, NULL, FcMatchPattern);
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46 if(!r)
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47 goto err;
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48
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49 r = FcConfigSubstituteWithPat(cfg, p, ptn, FcMatchFont);
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50 if(!r)
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51 goto err;
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52
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53 FcDefaultSubstitute(p);
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54
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55 FcPatternDestroy(ptn);
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56
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57 return p;
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58
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59 err:
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60 if(ptn)
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61 FcPatternDestroy(ptn);
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62 if(p)
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63 FcPatternDestroy(p);
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64 return NULL;
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65
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66 }
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67
393
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68 /*! \brief Query and return a font face for a specified attribute vector.
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69 *
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70 * Programmers use mb_font_face_t to specify fonts used to show a
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71 * block of text on the output device. They can get mb_font_face_t with
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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72 * this function. The objects return by mb_font_face_query() should be
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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73 * freed with mb_font_face_free() when they are not more used.
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74 *
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75 * \param family is the name of a font family (times).
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76 * \param slant is one of \ref MB_FONT_SLANTS.
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77 * \param weight decides if a font is thin or heavy.
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78 */
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79 mb_font_face_t *mb_font_face_query(redraw_man_t *rdman,
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80 const char *family,
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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81 int slant,
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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82 int weight) {
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83 cairo_font_face_t *cface;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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84 FcPattern *ptn;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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85
394
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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86 ptn = query_fontconfig(family, slant, weight);
393
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87
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88 cface = cairo_ft_font_face_create_for_pattern(ptn);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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89 FcPatternDestroy(ptn);
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90
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91 return (mb_font_face_t *)cface;
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92 }
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93
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94 void mb_font_face_free(mb_font_face_t *face) {
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95 cairo_font_face_t *cface = (cairo_font_face_t *)face;
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96 ASSERT(face != NULL);
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97 cairo_font_face_destroy(face);
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98 }
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99
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100 /*! \brief A simple implementation of text shape.
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101 *
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102 */
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103 typedef struct _sh_stext {
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104 shape_t shape;
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105 const char *txt; /*!< \brief Text to be showed */
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106 const mb_style_blk_t *style_blks; /*!< \brief Style of text */
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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107 int nblks; /*!< \brief Number of style blocks */
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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108 int max_nblks;
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109 co_aix x, y;
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110 cairo_scaled_font_t **scaled_fonts;
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111 } sh_stext_t;
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112
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113 shape_t *rdman_shape_stext_new(redraw_man_t *rdman, co_aix x, co_aix y,
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114 const char *txt) {
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115 sh_stext_t *txt_o;
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116
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117 ASSERT(txt != NULL);
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118
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119 txt_o = (sh_stext_t *)malloc(sizeof(sh_stext_t));
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120 if(txt_o == NULL)
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121 return NULL;
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122
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123 memset(&txt_o->shape, 0, sizeof(shape_t));
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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124 mb_obj_init(txt_o, MBO_STEXT);
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125
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diff changeset
126 txt_o->txt = strdup(txt);
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
127 txt_o->style_blks = NULL;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
128 txt_o->nblks = 0;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
129 txt_o->max_nblks = 0;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
130 txt_o->x = x;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
131 txt_o->y = y;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
132 txt_o->exts = NULL;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
133
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
134 if(txt_o->txt == NULL) {
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
135 free(txt_o);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
136 txt_o = NULL;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
137 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
138
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
139 return (shape_t *)txt_o;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
140 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
141
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
142 static
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
143 int compute_utf8_chars_sz(const char *txt, int n_chars) {
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
144 int i;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
145 const char *p = txt;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
146
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
147 for(i = 0; i < n && *p; i++) {
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
148 if(*p++ & 0x80)
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
149 continue; /* single byte */
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
150 /* multi-bytes */
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
151 while(*p && ((*p & 0xc0) == 0x80))
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
152 p++;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
153 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
154 if(i < n)
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
155 return ERR;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
156
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
157 return p - txt;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
158 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
159
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
160 static
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
161 void compute_text_extents(char *txt, int txt_len,
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
162 cairo_scaled_font_t *scaled_font,
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
163 cairo_text_extents_t *extents) {
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
164 char saved;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
165
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
166 saved = txt[txt_len];
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
167 txt[txt_len] = 0;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
168 cairo_scaled_font_text_extents(scaled_font, txt, extents);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
169 txt[txt_len] = saved;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
170 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
171
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
172 static
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
173 cairo_scaled_font_t *make_scaled_font_face(sh_stext_t *txt_o,
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
174 cairo_font_face_t *face,
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
175 co_aix shift_x, co_aix shift_y,
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
176 co_aix font_sz) {
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
177 cairo_matrix_t cmtx;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
178 static cairo_matrix_t cid;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
179 static cairo_font_options_t *fopt = NULL;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
180 co_aix *matrix;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
181 cairo_scaled_font_t *scaled;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
182 int i;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
183
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
184 if(fopt == NULL) {
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
185 cairo_matrix_init_identify(&cid);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
186 fopt = cairo_font_options_create();
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
187 if(fopt == NULL)
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
188 return NULL;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
189 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
190
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
191 matrix = sh_get_aggr_matrix((shape_t *)txt_o);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
192 i = 0;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
193 cmtx.xx = matrix[i++];
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
194 cmtx.xy = matrix[i++];
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
195 cmtx.x0 = matrix[i++] + shift_x;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
196 cmtx.yx = matrix[i++];
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
197 cmtx.yy = matrix[i++];
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
198 cmtx.y0 = matrix[i] + shift_y;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
199
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
200 scaled = cairo_scaled_font_create(face, &cmtx, &cid, fopt);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
201
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
202 return scaled;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
203 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
204
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
205 static
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
206 void compute_extents(sh_stext_t *txt_o) {
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
207 co_aix adv_x, adv_y;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
208 cairo_text_extents_t extents;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
209 mb_style_blk_t *blk;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
210 cairo_scaled_font_t *scaled_font;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
211 char *txt;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
212 co_aix shift_x, shift_y;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
213 int blk_txt_len;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
214 int i;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
215
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
216 adv_x = adv_y = 0;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
217 blk = txt_o->style_blks;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
218 scaled_font = txt_o->scaled_fonts;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
219 txt = (char *)txt_o->txt;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
220 shift_x = txt_o->x;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
221 shift_y = txt_o->y;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
222 for(i = 0; i < txt_o->nblks; i++) {
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
223 *scaled_font = make_scaled_fonts(txt_o, blk->face,
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
224 shift_x, shift_y, font_sz);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
225 ASSERT(*scaled_font != NULL);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
226
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
227 blk_txt_len = compute_utf8_chars_sz(txt, blk->n_chars);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
228 ASSERT(blk_txt_len != ERR);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
229
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
230 compute_text_extents(txt, blk_txt_len, *scaled_font, &extents);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
231 adv_x += extents.x_advance;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
232 adv_y += extents.y_advance;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
233
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
234 scaled_font++;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
235 blk++;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
236 txt += blk_txt_len;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
237 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
238 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
239
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
240 /*
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
241 * What we have to do in sh_stext_transform() is
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
242 * - computing bounding box for the text,
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
243 * - computing offset x,y for the text of style blocks,
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
244 * - free old scaled fonts, and
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
245 * - making scaled fonts for style blocks.
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
246 */
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
247 void sh_stext_transform(shape_t *shape) {
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
248 sh_stext_t *txt_o = (sh_stext_t *)shape;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
249
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
250 ASSERT(txt_o != NULL);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
251 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
252
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
253 void sh_stext_draw(shape_t *shape, cairo_t *cr) {
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
254 sh_stext_t *txt_o = (sh_stext_t *)shape;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
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255
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256 ASSERT(txt_o != NULL);
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257 }
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258
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259 int sh_stext_set_text(shape_t *shape, const char *txt) {
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260 sh_stext_t *txt_o = (sh_stext_t *)shape;
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261 char *new_txt;
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262 int sz;
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263
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264 ASSERT(txt_o != NULL);
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265 ASSERT(txt != NULL);
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266
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267 sz = strlen(txt) + 1;
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268 new_txt = realloc(txt_o->txt, sz);
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269 if(new_txt == NULL)
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270 return ERR;
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271
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272 memcpy(new_txt, txt, sz);
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273 txt_o->txt = new_txt;
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274
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275 return OK;
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276 }
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277
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278 int sh_stext_set_style(shape_t *shape,
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279 const mb_style_blk_t *blks,
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280 int nblks) {
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281 sh_stext_t *txt_o = (sh_stext_t *)shape;
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282 mb_style_blk_t *new_blks;
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283 co_aix *new_exts;
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284 int sz;
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285
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286 ASSERT(txt_o != NULL);
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287 ASSERT(nblks >= 0);
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288
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289 if(nblks > txt_o->max_nblks) {
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290 sz = nblks * (sizeof(mb_style_blk_t) + sizeof(int));
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291 new_blks = (mb_style_blk_t *)realloc(txt_o->style_blks, sz);
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292 if(new_blks == NULL)
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293 return ERR;
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294 new_exts = (int *)(new_blks + nblks);
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295
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296 txt_o->style_blks = new_blks;
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297 txt_o->exts = new_exts;
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298 txt_o->max_nblks = nblks;
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299 }
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300
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301 memcpy(txt_o->blks, blks, nblks * sizeof(mb_style_blk_t));
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302 txt_o->nblks = nblks;
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303
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304 return OK;
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305 }
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306
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307 #endif /* 0 */