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annotate src/shape_stext.c @ 393:27774b93521e

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Add sh_stext_t to implement a simple version of text shape. - It is still under construction. - It is supposed to be a simple, less dependency implementation. - It is more less functional than sh_text_t.
author Thinker K.F. Li <thinker@branda.to>
date Mon, 08 Jun 2009 07:04:20 +0800
parents
children b3d5ce48670a
rev   line source
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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1 #include <stdio.h>
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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2 #include <cairo.h>
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3 #include <fontconfig.h>
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4 #include "mb_shapes.h"
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5
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6 #if 0
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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 #define OK 0
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12 #define ERR -1
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13
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14 /*! \brief Query and return a font face for a specified attribute vector.
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15 *
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16 * Programmers use mb_font_face_t to specify fonts used to show a
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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17 * block of text on the output device. They can get mb_font_face_t with
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18 * 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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19 * freed with mb_font_face_free() when they are not more used.
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20 *
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21 * \param family is the name of a font family (times).
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22 * \param slant is one of \ref MB_FONT_SLANTS.
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23 * \param weight decides if a font is thin or heavy.
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24 */
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25 mb_font_face_t *mb_font_face_query(redraw_man_t *rdman,
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26 const char *family,
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27 int slant,
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28 int weight) {
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29 cairo_font_face_t *cface;
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30 FcPattern *ptn;
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31 FcValue val;
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32 static int slant_map[] = { /* from MB_FONT_SLANT_* to FC_SLANT_* */
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33 FC_SLANT_ROMAN,
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34 FC_SLANT_ROMAN,
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35 FC_SLANT_ITALIC,
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36 FC_SLANT_OBLIQUE};
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37
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38 ptn = FcPatternCreate();
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39 val.type = FcTypeString;
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40 val.s = family;
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41 FcPatternAdd(ptn, "family", val, FcTrue);
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42
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43 if(family < 0 || family >= MB_FONT_SLANT_MAX) {
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44 FcPatternDestroy(ptn);
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45 return NULL;
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46 }
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47 val.type = FcTypeInteger;
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48 val.i = slant_map[slant];
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49 FcPatternAdd(ptn, "slant", val, FcTrue);
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50
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51 val.type = FcTypeInteger;
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52 val.i = weight;
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53 FcPatternAdd(ptn, "weight", val, FcTrue);
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54
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55 cface = cairo_ft_font_face_create_for_pattern(ptn);
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56 FcPatternDestroy(ptn);
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57
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58 return (mb_font_face_t *)cface;
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59 }
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60
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61 void mb_font_face_free(mb_font_face_t *face) {
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62 cairo_font_face_t *cface = (cairo_font_face_t *)face;
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63 ASSERT(face != NULL);
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64 cairo_font_face_destroy(face);
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65 }
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66
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67 /*! \brief A simple implementation of text shape.
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68 *
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69 */
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70 typedef struct _sh_stext {
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71 shape_t shape;
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72 const char *txt; /*!< \brief Text to be showed */
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73 const mb_style_blk_t *style_blks; /*!< \brief Style of text */
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74 int nblks; /*!< \brief Number of style blocks */
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75 int max_nblks;
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76 co_aix x, y;
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77 cairo_scaled_font_t **scaled_fonts;
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78 } sh_stext_t;
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79
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80 shape_t *rdman_shape_stext_new(redraw_man_t *rdman, co_aix x, co_aix y,
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81 const char *txt) {
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82 sh_stext_t *txt_o;
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83
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84 ASSERT(txt != NULL);
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85
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86 txt_o = (sh_stext_t *)malloc(sizeof(sh_stext_t));
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87 if(txt_o == NULL)
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88 return NULL;
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89
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90 memset(&txt_o->shape, 0, sizeof(shape_t));
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91 mb_obj_init(txt_o, MBO_STEXT);
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92
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93 txt_o->txt = strdup(txt);
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94 txt_o->style_blks = NULL;
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95 txt_o->nblks = 0;
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96 txt_o->max_nblks = 0;
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97 txt_o->x = x;
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98 txt_o->y = y;
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99 txt_o->exts = NULL;
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100
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101 if(txt_o->txt == NULL) {
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102 free(txt_o);
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103 txt_o = NULL;
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104 }
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105
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106 return (shape_t *)txt_o;
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107 }
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108
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109 static
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110 int compute_utf8_chars_sz(const char *txt, int n_chars) {
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111 int i;
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112 const char *p = txt;
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113
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114 for(i = 0; i < n && *p; i++) {
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115 if(*p++ & 0x80)
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116 continue; /* single byte */
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117 /* multi-bytes */
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118 while(*p && ((*p & 0xc0) == 0x80))
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119 p++;
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120 }
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121 if(i < n)
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122 return ERR;
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123
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124 return p - txt;
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125 }
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126
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127 static
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
128 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
129 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
130 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
131 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
132
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
133 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
134 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
135 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
136 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
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 static
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
140 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
141 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
142 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
143 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
144 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
145 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
146 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
147 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
148 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
149 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
150
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
151 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
152 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
153 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
154 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
155 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
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
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
158 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
159 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
160 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
161 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
162 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
163 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
164 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
165 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
166
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
167 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
168
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
169 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
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
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
172 static
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
173 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
174 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
175 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
176 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
177 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
178 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
179 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
180 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
181 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
182
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
183 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
184 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
185 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
186 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
187 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
188 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
189 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
190 *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
191 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
192 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
193
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
194 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
195 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
196
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
197 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
198 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
199 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
200
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
201 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
202 blk++;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
203 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
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 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
206
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
207 /*
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
208 * 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
209 * - 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
210 * - 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
211 * - 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
212 * - 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
213 */
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
214 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
215 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
216
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
217 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
218 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
219
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
220 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
221 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
222
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
223 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
224 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
225
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
226 int sh_stext_set_text(shape_t *shape, const 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
227 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
228 char *new_txt;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
229 int sz;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
230
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
231 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
232 ASSERT(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
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 sz = strlen(txt) + 1;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
235 new_txt = realloc(txt_o->txt, sz);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
236 if(new_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
237 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
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 memcpy(new_txt, txt, sz);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
240 txt_o->txt = new_txt;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
241
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
242 return OK;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
243 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
244
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
245 int sh_stext_set_style(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
246 const mb_style_blk_t *blks,
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
247 int nblks) {
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 mb_style_blk_t *new_blks;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
250 co_aix *new_exts;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
251 int sz;
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 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
254 ASSERT(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
255
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
256 if(nblks > txt_o->max_nblks) {
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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257 sz = nblks * (sizeof(mb_style_blk_t) + sizeof(int));
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Thinker K.F. Li <thinker@branda.to>
parents:
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258 new_blks = (mb_style_blk_t *)realloc(txt_o->style_blks, sz);
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Thinker K.F. Li <thinker@branda.to>
parents:
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259 if(new_blks == NULL)
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Thinker K.F. Li <thinker@branda.to>
parents:
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260 return ERR;
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Thinker K.F. Li <thinker@branda.to>
parents:
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261 new_exts = (int *)(new_blks + nblks);
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Thinker K.F. Li <thinker@branda.to>
parents:
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262
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Thinker K.F. Li <thinker@branda.to>
parents:
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263 txt_o->style_blks = new_blks;
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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264 txt_o->exts = new_exts;
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Thinker K.F. Li <thinker@branda.to>
parents:
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265 txt_o->max_nblks = nblks;
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Thinker K.F. Li <thinker@branda.to>
parents:
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266 }
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Thinker K.F. Li <thinker@branda.to>
parents:
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267
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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268 memcpy(txt_o->blks, blks, nblks * sizeof(mb_style_blk_t));
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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269 txt_o->nblks = nblks;
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Thinker K.F. Li <thinker@branda.to>
parents:
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270
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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271 return OK;
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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272 }
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Thinker K.F. Li <thinker@branda.to>
parents:
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273
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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274 #endif /* 0 */