annotate src/shape_stext.c @ 395:d30b575a4ad4

Add fontconfig layer
author Thinker K.F. Li <thinker@branda.to>
date Wed, 10 Jun 2009 21:45:39 +0800
parents b3d5ce48670a
children 7fe0b1ee92b6
rev   line source
394
b3d5ce48670a Use fontconfig to find out a font for a family/slant/weight pattern
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1 #if 0
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2
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27774b93521e Add sh_stext_t to implement a simple version of text shape.
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3 #include <stdio.h>
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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4 #include <cairo.h>
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5 #include <cairo-ft.h>
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6 #include <fontconfig/fontconfig.h>
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7 #include "mb_shapes.h"
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8
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9 #ifndef ASSERT
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10 #define ASSERT(x)
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11 #endif
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12 #define OK 0
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13 #define ERR -1
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14
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d30b575a4ad4 Add fontconfig layer
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15 /*! \brief Find out a font pattern.
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16 *
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17 * This function use fontconfig to decide a font file in pattern. It can
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18 * replaced by other mechanism if you think it is not what you want.
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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;
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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 static int slant_map[] = { /* from MB_FONT_SLANT_* to FC_SLANT_* */
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27 FC_SLANT_ROMAN,
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28 FC_SLANT_ROMAN,
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29 FC_SLANT_ITALIC,
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30 FC_SLANT_OBLIQUE};
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31
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32 cfg = FcConfigGetCurrent();
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33 ptn = FcPatternCreate();
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34 p = FcPatternCreate();
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35 if(ptn == NULL || p == NULL)
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36 goto err;
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37
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38 val.type = FcTypeString;
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39 val.u.s = family;
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40 FcPatternAdd(ptn, "family", &val, FcTrue);
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41
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42 val.type = FcTypeInteger;
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43 val.u.i = slant_map[slant];
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44 FcPatternAdd(ptn, "slant", &val, FcTrue);
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45
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46 val.type = FcTypeInteger;
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47 val.u.i = weight;
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48 FcPatternAdd(ptn, "weight", &val, FcTrue);
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49
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50 r = FcConfigSubstituteWithPat(cfg, ptn, NULL, FcMatchPattern);
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51 if(!r)
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52 goto err;
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53
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54 r = FcConfigSubstituteWithPat(cfg, p, ptn, FcMatchFont);
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55 if(!r)
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56 goto err;
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57
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58 FcDefaultSubstitute(p);
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59
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60 FcPatternDestroy(ptn);
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61
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62 return p;
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63
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64 err:
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65 if(ptn)
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66 FcPatternDestroy(ptn);
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67 if(p)
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68 FcPatternDestroy(p);
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69 return NULL;
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70
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71 }
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72
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73 /*! \brief Find out a font face for a pattern specified.
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74 *
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75 * The pattern, here, is a vector of family, slant, and weight.
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76 * This function base on fontconfig and cairo FreeType font supporting.
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77 * You can replace this function with other font mechanisms.
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78 */
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79 static
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80 cairo_font_face_t *query_font_face(const char *family,
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81 int slant,
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82 int weight) {
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83 cairo_font_face_t *cface;
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84 FcPattern *ptn;
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85
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86 ptn = query_font_pattern(family, slant, weight);
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87 cface = cairo_ft_font_face_create_for_pattern(ptn);
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88 FcPatternDestroy(ptn);
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89
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90 return cface;
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91 }
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92
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93 static
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94 void free_font_face(cairo_font_face_t *cface) {
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95 ASSERT(cface == NULL);
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96
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97 cairo_font_face_destroy(cface);
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98 }
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99
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100 /*! \brief This is scaled font for specified size and extent.
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101 *
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102 * Font face only specified which font would be used to draw text
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103 * message. But, it also need to scale glyphs to specified size and
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104 * rotation. This function return a scaled font specified by a
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105 * matrix that transform glyph from design space of the font to
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106 * user space of cairo surface.
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107 */
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108 static
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109 cairo_scaled_font_t *get_ciaro_scaled_font(cairo_font_face_t *cface,
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110 co_aix *matrix) {
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111 cairo_font_face_t *scaled_font;
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112 cairo_matrix_t font_matrix;
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113 static cairo_matir_t id = {
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114 1, 0,
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115 0, 1,
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116 0, 0
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117 };
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118 static cairo_font_options_t *opt = NULL;
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119
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120 ASSERT(matrix != NULL);
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121
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122 if(opt == NULL) {
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123 opt = cairo_font_options_create();
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124 if(opt == NULL)
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125 return NULL;
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126 }
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127
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128 font_matrix.xx = *matrix++;
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129 font_matrix.xy = *matrix++;
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130 font_matrix.x0 = *matrix++;
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131 font_matrix.yx = *matrix++;
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132 font_matrix.yy = *matrix++;
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133 font_matrix.y0 = *matrix;
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134 scaled_font = cairo_scaled_font_create(cface, &font_matrix,
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135 &id, opt);
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136
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137 return scaled_font;
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138 }
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139
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140 static
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141 void free_scaled_font(cairo_scaled_font_t *scaled_font) {
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142 cairo_scaled_font_destroy(scaled_font);
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143 }
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144
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diff changeset
145 /* ============================================================ */
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146
393
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147 /*! \brief Query and return a font face for a specified attribute vector.
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148 *
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149 * Programmers use mb_font_face_t to specify fonts used to show a
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150 * block of text on the output device. They can get mb_font_face_t with
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151 * this function. The objects return by mb_font_face_query() should be
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152 * freed with mb_font_face_free() when they are not more used.
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153 *
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154 * \param family is the name of a font family (times).
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155 * \param slant is one of \ref MB_FONT_SLANTS.
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156 * \param weight decides if a font is thin or heavy.
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157 */
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158 mb_font_face_t *mb_font_face_query(redraw_man_t *rdman,
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159 const char *family,
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160 int slant,
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161 int weight) {
395
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162 return (mb_font_face_t *)query_font_face(family, slant, weight);
393
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163 }
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164
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165 void mb_font_face_free(mb_font_face_t *face) {
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166 cairo_font_face_t *cface = (cairo_font_face_t *)face;
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167 ASSERT(face != NULL);
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168 cairo_font_face_destroy(face);
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169 }
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170
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171 /*! \brief A simple implementation of text shape.
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172 *
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173 */
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174 typedef struct _sh_stext {
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175 shape_t shape;
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176 const char *txt; /*!< \brief Text to be showed */
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177 const mb_style_blk_t *style_blks; /*!< \brief Style of text */
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178 int nblks; /*!< \brief Number of style blocks */
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179 int max_nblks;
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180 co_aix x, y;
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181 cairo_scaled_font_t **scaled_fonts;
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182 } sh_stext_t;
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183
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184 shape_t *rdman_shape_stext_new(redraw_man_t *rdman, co_aix x, co_aix y,
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185 const char *txt) {
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186 sh_stext_t *txt_o;
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187
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188 ASSERT(txt != NULL);
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189
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190 txt_o = (sh_stext_t *)malloc(sizeof(sh_stext_t));
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191 if(txt_o == NULL)
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192 return NULL;
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193
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194 memset(&txt_o->shape, 0, sizeof(shape_t));
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195 mb_obj_init(txt_o, MBO_STEXT);
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196
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197 txt_o->txt = strdup(txt);
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198 txt_o->style_blks = NULL;
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199 txt_o->nblks = 0;
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200 txt_o->max_nblks = 0;
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201 txt_o->x = x;
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202 txt_o->y = y;
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203 txt_o->exts = NULL;
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204
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205 if(txt_o->txt == NULL) {
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206 free(txt_o);
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207 txt_o = NULL;
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208 }
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209
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210 return (shape_t *)txt_o;
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211 }
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212
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213 static
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214 int compute_utf8_chars_sz(const char *txt, int n_chars) {
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215 int i;
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216 const char *p = txt;
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217
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218 for(i = 0; i < n && *p; i++) {
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219 if(*p++ & 0x80)
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220 continue; /* single byte */
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221 /* multi-bytes */
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222 while(*p && ((*p & 0xc0) == 0x80))
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223 p++;
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224 }
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225 if(i < n)
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226 return ERR;
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227
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228 return p - txt;
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229 }
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230
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231 static
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232 void compute_text_extents(char *txt, int txt_len,
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233 cairo_scaled_font_t *scaled_font,
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234 cairo_text_extents_t *extents) {
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235 char saved;
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236
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237 saved = txt[txt_len];
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238 txt[txt_len] = 0;
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239 cairo_scaled_font_text_extents(scaled_font, txt, extents);
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240 txt[txt_len] = saved;
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Thinker K.F. Li <thinker@branda.to>
parents:
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241 }
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242
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243 static
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244 cairo_scaled_font_t *make_scaled_font_face(sh_stext_t *txt_o,
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245 cairo_font_face_t *face,
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diff changeset
246 co_aix shift_x, co_aix shift_y,
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
247 co_aix font_sz) {
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248 cairo_matrix_t cmtx;
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249 static cairo_matrix_t cid;
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250 static cairo_font_options_t *fopt = NULL;
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251 co_aix *matrix;
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252 cairo_scaled_font_t *scaled;
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diff changeset
253 int i;
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diff changeset
254
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
255 if(fopt == NULL) {
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diff changeset
256 cairo_matrix_init_identify(&cid);
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257 fopt = cairo_font_options_create();
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diff changeset
258 if(fopt == NULL)
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Thinker K.F. Li <thinker@branda.to>
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diff changeset
259 return NULL;
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
260 }
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
261
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Thinker K.F. Li <thinker@branda.to>
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262 matrix = sh_get_aggr_matrix((shape_t *)txt_o);
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
263 i = 0;
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
264 cmtx.xx = matrix[i++];
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
265 cmtx.xy = matrix[i++];
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
266 cmtx.x0 = matrix[i++] + shift_x;
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
267 cmtx.yx = matrix[i++];
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
268 cmtx.yy = matrix[i++];
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Thinker K.F. Li <thinker@branda.to>
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diff changeset
269 cmtx.y0 = matrix[i] + shift_y;
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parents:
diff changeset
270
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
271 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
272
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
273 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
274 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
275
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
276 static
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
277 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
278 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
279 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
280 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
281 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
282 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
283 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
284 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
285 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
286
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
287 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
288 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
289 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
290 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
291 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
292 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
293 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
294 *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
295 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
296 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
297
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
298 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
299 ASSERT(blk_txt_len != ERR);
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
300
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
301 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
302 adv_x += extents.x_advance;
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
303 adv_y += extents.y_advance;
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
304
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
305 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
306 blk++;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
307 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
308 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
309 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
310
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
311 /*
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
312 * 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:
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313 * - 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
314 * - 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
315 * - 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
316 * - 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
317 */
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
318 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
319 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
320
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
321 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
322 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
323
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
324 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
325 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
326
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
327 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
328 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
329
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
330 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
331 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
332 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
333 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
334
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
335 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
336 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
337
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
338 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
339 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
340 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
341 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
342
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
343 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
344 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
345
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
346 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
347 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
348
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
349 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
350 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
351 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
352 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
353 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
354 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
355 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
356
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
357 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
358 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
359
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
360 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:
diff changeset
361 sz = nblks * (sizeof(mb_style_blk_t) + sizeof(int));
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
362 new_blks = (mb_style_blk_t *)realloc(txt_o->style_blks, sz);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
363 if(new_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
364 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
365 new_exts = (int *)(new_blks + nblks);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
366
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
367 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:
diff changeset
368 txt_o->exts = 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
369 txt_o->max_nblks = nblks;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
370 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
371
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
372 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:
diff changeset
373 txt_o->nblks = nblks;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
374
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
375 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
376 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
377
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
378 #endif /* 0 */