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annotate src/shape_stext.c @ 403:aee0f66b1154

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Compute extents of a styled text
author Thinker K.F. Li <thinker@branda.to>
date Tue, 16 Jun 2009 23:01:38 +0800
parents 55f38c2cdb8f
children 92a459a1c5aa
rev   line source
396
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer
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diff changeset
1 #ifdef SHAPE_STEXT
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2
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3 #include <stdio.h>
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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
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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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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15 /*! \defgroup fontconfig_freetype Fontconfig and FreeType Layer.
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16 *
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17 * This layer implements a font provider to reset of the system.
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18 * It bases on fontconfig and FreeType supporting of Cairo.
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19 *
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20 * @{
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21 */
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22 /*! \brief Stakeholder of scaled font.
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23 *
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24 * It is actually a cairo_scaled_font_t, now. But, it should not be
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25 * noticed by out-siders. Only \ref fontconfig_freetype
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26 * should known it.
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27 */
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28 typedef struct _mb_scaled_font mb_scaled_font_t;
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29
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer
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30 /*! \brief Stakeholder of scaled font.
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31 *
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32 * Although, mb_text_extents_t is defined as a cairo_scaled_font_t, but
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33 * programmers should assume it is opague.
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34 */
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35 typedef cairo_text_extents_t mb_text_extents_t;
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36
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37 #define MBE_GET_X_ADV(ext) ((ext)->x_advance)
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38 #define MBE_GET_Y_ADV(ext) ((ext)->y_advance)
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55f38c2cdb8f Refactor function of computing text extents
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39 #define MBE_GET_X_BEARING(ext) ((ext)->x_bearing)
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40 #define MBE_GET_Y_BEARING(ext) ((ext)->y_bearing)
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41 #define MBE_GET_WIDTH(ext) ((ext)->width)
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42 #define MBE_GET_HEIGHT(ext) ((ext)->height)
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43 #define MBE_SET_X_ADV(ext, v) do { ((ext)->x_advance) = v; } while(0)
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44 #define MBE_SET_Y_ADV(ext, v) do { ((ext)->y_advance) = v; } while(0)
aee0f66b1154 Compute extents of a styled text
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45 #define MBE_SET_X_BEARING(ext, v) do { ((ext)->x_bearing) = v; } while(0)
aee0f66b1154 Compute extents of a styled text
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46 #define MBE_SET_Y_BEARING(ext, v) do { ((ext)->y_bearing) = v; } while(0)
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47 #define MBE_SET_WIDTH(ext, v) do { ((ext)->width) = v; } while(0)
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48 #define MBE_SET_HEIGHT(ext, v) do { ((ext)->height) = v; } while(0)
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49
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50 /*! \brief Find out a font pattern.
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51 *
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52 * This function use fontconfig to decide a font file in pattern. It can
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53 * replaced by other mechanism if you think it is not what you want.
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54 */
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55 static
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56 FcPattern *query_font_pattern(const char *family, int slant, int weight) {
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57 FcPattern *ptn, *p;
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58 FcValue val;
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59 FcConfig *cfg;
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60 FcBool r;
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61 static int slant_map[] = { /* from MB_FONT_SLANT_* to FC_SLANT_* */
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62 FC_SLANT_ROMAN,
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63 FC_SLANT_ROMAN,
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64 FC_SLANT_ITALIC,
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65 FC_SLANT_OBLIQUE};
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66
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67 cfg = FcConfigGetCurrent();
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68 ptn = FcPatternCreate();
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69 p = FcPatternCreate();
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70 if(ptn == NULL || p == NULL)
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71 goto err;
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72
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73 val.type = FcTypeString;
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74 val.u.s = family;
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75 FcPatternAdd(ptn, "family", &val, FcTrue);
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76
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77 val.type = FcTypeInteger;
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78 val.u.i = slant_map[slant];
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79 FcPatternAdd(ptn, "slant", &val, FcTrue);
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80
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81 val.type = FcTypeInteger;
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82 val.u.i = weight;
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83 FcPatternAdd(ptn, "weight", &val, FcTrue);
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84
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85 r = FcConfigSubstituteWithPat(cfg, ptn, NULL, FcMatchPattern);
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86 if(!r)
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87 goto err;
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88
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89 r = FcConfigSubstituteWithPat(cfg, p, ptn, FcMatchFont);
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90 if(!r)
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91 goto err;
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92
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93 FcDefaultSubstitute(p);
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94
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95 FcPatternDestroy(ptn);
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96
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97 return p;
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98
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99 err:
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100 if(ptn)
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101 FcPatternDestroy(ptn);
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102 if(p)
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103 FcPatternDestroy(p);
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104 return NULL;
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105
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106 }
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107
395
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108 /*! \brief Find out a font face for a pattern specified.
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109 *
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110 * The pattern, here, is a vector of family, slant, and weight.
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111 * This function base on fontconfig and cairo FreeType font supporting.
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112 * You can replace this function with other font mechanisms.
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113 */
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114 static
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115 mb_font_face_t *query_font_face(const char *family, int slant, int weight) {
395
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116 cairo_font_face_t *cface;
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117 FcPattern *ptn;
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118
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119 ptn = query_font_pattern(family, slant, weight);
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120 cface = cairo_ft_font_face_create_for_pattern(ptn);
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121 FcPatternDestroy(ptn);
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122
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123 return (mb_font_face_t *)cface;
395
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124 }
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125
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126 static
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127 void free_font_face(mb_font_face_t *face) {
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128 ASSERT(face == NULL);
395
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129
396
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130 cairo_font_face_destroy((cairo_font_face_t *)face);
395
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131 }
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132
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133 /*! \brief This is scaled font for specified size and extent.
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134 *
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135 * Font face only specified which font would be used to draw text
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136 * message. But, it also need to scale glyphs to specified size and
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137 * rotation. This function return a scaled font specified by a
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138 * matrix that transform glyph from design space of the font to
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139 * user space of cairo surface.
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140 */
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141 static
397
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142 mb_scaled_font_t *make_scaled_font_face_matrix(mb_font_face_t *face,
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143 co_aix *matrix) {
395
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144 cairo_font_face_t *scaled_font;
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145 cairo_matrix_t font_matrix;
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146 static cairo_matir_t id = {
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147 1, 0,
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148 0, 1,
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149 0, 0
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150 };
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151 static cairo_font_options_t *opt = NULL;
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152
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153 ASSERT(matrix != NULL);
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154
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155 if(opt == NULL) {
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156 opt = cairo_font_options_create();
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157 if(opt == NULL)
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158 return NULL;
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159 }
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160
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161 font_matrix.xx = *matrix++;
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162 font_matrix.xy = *matrix++;
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163 font_matrix.x0 = *matrix++;
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164 font_matrix.yx = *matrix++;
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165 font_matrix.yy = *matrix++;
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166 font_matrix.y0 = *matrix;
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167 scaled_font = cairo_scaled_font_create((cairo_font_face_t *)face,
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168 &font_matrix,
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169 &id, opt);
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170
396
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171 return (mb_scaled_font_t *)scaled_font;
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172 }
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173
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174 static
397
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175 void scaled_font_free(mb_scaled_font_t *scaled_font) {
396
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176 cairo_scaled_font_destroy((cairo_scaled_font_t *)scaled_font);
395
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177 }
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178
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179 static
397
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180 void compute_text_extents(mb_scaled_font_t *scaled_font, const char *txt,
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181 mb_text_extents_t *extents) {
396
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182 cairo_scaled_font_text_extents((cairo_scaled_font_t *)scaled_font,
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183 txt,
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184 (cairo_text_extents_t *)extents);
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185 }
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186
396
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187 static
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188 mb_text_extents_t *mb_text_extents_new(void) {
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189 cairo_text_extents_t *extents;
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190
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191 extents = (cairo_text_extents_t *)malloc(sizeof(cairo_text_extents_t));
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192 return extents;
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193 }
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194
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195 static
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196 void mb_text_extents_free(mb_text_extents_t *extents) {
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197 free(extents);
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198 }
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199
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200 /* @} */
395
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201
393
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202 /*! \brief Query and return a font face for a specified attribute vector.
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203 *
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204 * Programmers use mb_font_face_t to specify fonts used to show a
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205 * block of text on the output device. They can get mb_font_face_t with
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206 * this function. The objects return by mb_font_face_query() should be
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207 * freed with mb_font_face_free() when they are not more used.
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208 *
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209 * \param family is the name of a font family (times).
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210 * \param slant is one of \ref MB_FONT_SLANTS.
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211 * \param weight decides if a font is thin or heavy.
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212 */
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213 mb_font_face_t *mb_font_face_query(redraw_man_t *rdman,
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214 const char *family,
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215 int slant,
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216 int weight) {
396
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217 return query_font_face(family, slant, weight);
393
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218 }
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219
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220 void mb_font_face_free(mb_font_face_t *face) {
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221 ASSERT(face != NULL);
396
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222 free_font_face(face);
393
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223 }
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224
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225 /*! \brief A simple implementation of text shape.
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226 *
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227 */
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228 typedef struct _sh_stext {
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229 shape_t shape;
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230 const char *txt; /*!< \brief Text to be showed */
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231 const mb_style_blk_t *style_blks; /*!< \brief Style of text */
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232 int nblks; /*!< \brief Number of style blocks */
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233 int max_nblks;
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234 co_aix x, y;
396
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235 mb_scaled_font_t **scaled_fonts;
403
aee0f66b1154 Compute extents of a styled text
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236 mb_text_extents_t extents;
393
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237 } sh_stext_t;
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238
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239 shape_t *rdman_shape_stext_new(redraw_man_t *rdman, co_aix x, co_aix y,
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240 const char *txt) {
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241 sh_stext_t *txt_o;
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242
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243 ASSERT(txt != NULL);
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244
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245 txt_o = (sh_stext_t *)malloc(sizeof(sh_stext_t));
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246 if(txt_o == NULL)
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247 return NULL;
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248
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249 memset(&txt_o->shape, 0, sizeof(shape_t));
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250 mb_obj_init(txt_o, MBO_STEXT);
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251
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252 txt_o->txt = strdup(txt);
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253 txt_o->style_blks = NULL;
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254 txt_o->nblks = 0;
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255 txt_o->max_nblks = 0;
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256 txt_o->x = x;
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257 txt_o->y = y;
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258 txt_o->exts = NULL;
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259
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260 if(txt_o->txt == NULL) {
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261 free(txt_o);
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262 txt_o = NULL;
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263 }
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diff changeset
264
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265 return (shape_t *)txt_o;
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266 }
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267
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diff changeset
268 static
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
269 int compute_utf8_chars_sz(const char *txt, int n_chars) {
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diff changeset
270 int i;
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271 const char *p = txt;
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272
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273 for(i = 0; i < n && *p; i++) {
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parents:
diff changeset
274 if(*p++ & 0x80)
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275 continue; /* single byte */
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diff changeset
276 /* multi-bytes */
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diff changeset
277 while(*p && ((*p & 0xc0) == 0x80))
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diff changeset
278 p++;
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parents:
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279 }
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parents:
diff changeset
280 if(i < n)
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diff changeset
281 return ERR;
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282
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283 return p - txt;
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parents:
diff changeset
284 }
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285
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286 static
397
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287 mb_scaled_font_t *make_scaled_font_face(sh_stext_t *txt_o,
393
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288 cairo_font_face_t *face,
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289 co_aix shift_x, co_aix shift_y,
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290 co_aix font_sz) {
397
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diff changeset
291 co_aix matrix[6], scaled_matrix[6];
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diff changeset
292 co_aix *aggr;
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293 mb_scaled_font_t *scaled;
393
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294
397
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295 aggr = sh_get_aggr_matrix((shape_t *)txt_o);
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diff changeset
296 matrix[0] = font_sz;
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diff changeset
297 matrix[1] = 0;
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diff changeset
298 matrix[2] = shift_x;
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diff changeset
299 matrix[3] = 0;
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300 matrix[4] = font_sz;
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diff changeset
301 matrix[5] += shift_y;
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diff changeset
302 matrix_mul(aggr, matrix, scaled_matrix);
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diff changeset
303
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diff changeset
304 scaled = make_scaled_font_face_matrix(face, scaled_matrix);
393
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305
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306 return scaled;
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307 }
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308
403
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309 /*! \brief Extend an extents from another sub-extents.
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diff changeset
310 *
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311 * A styled text is styled by several styled blocks, so extents of
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312 * blocks should be computed separated, collected, and aggreagated
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313 * into a full extents.
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diff changeset
314 */
393
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315 static
403
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diff changeset
316 void extent_extents(mb_text_extents_t *full, mb_text_extents_t *sub) {
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parents: 397
diff changeset
317 co_aix f_rbx, f_rby;
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diff changeset
318 co_aix s_rbx, s_rby;
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diff changeset
319
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diff changeset
320 f_rbx = MBE_GET_X_BEARING(full) + MBE_GET_WIDTH(full);
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diff changeset
321 f_rby = MBE_GET_Y_BEARING(full) + MBE_GET_HEIGHT(full);
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diff changeset
322 s_rbx = MBE_GET_X_BEARING(sub) + MBE_GET_WIDTH(sub);
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parents: 397
diff changeset
323 s_rby = MBE_GET_Y_BEARING(sub) + MBE_GET_HEIGHT(sub);
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diff changeset
324
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diff changeset
325 /* set bearing */
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diff changeset
326 if(MBE_GET_X_BEARING(full) > MBE_GET_X_BEARING(sub))
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parents: 397
diff changeset
327 MBE_SET_X_BEARING(full, MBE_GET_X_BEARING(sub));
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parents: 397
diff changeset
328 if(MBE_GET_Y_BEARING(full) > MBE_GET_Y_BEARING(sub))
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parents: 397
diff changeset
329 MBE_SET_Y_BEARING(full, MBE_GET_Y_BEARING(sub));
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diff changeset
330
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parents: 397
diff changeset
331 /* set width/height */
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diff changeset
332 if(f_rbx < s_rbx)
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diff changeset
333 MBE_SET_WIDTH(full, s_rbx - MBE_GET_X_BEARING(full));
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parents: 397
diff changeset
334 if(f_rby < s_rby)
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diff changeset
335 MBE_SET_HEIGHT(full, s_rby - MBE_GET_Y_BEARING(full));
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diff changeset
336 }
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diff changeset
337
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diff changeset
338 /*! \brief Compute extents of a stext object according style blocks.
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diff changeset
339 *
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diff changeset
340 * It create scaled fonts for style blocks, compute their extents,
aee0f66b1154 Compute extents of a styled text
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parents: 397
diff changeset
341 * and compute where they should be draw acoording advance of style
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parents: 397
diff changeset
342 * blocks before a style block.
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diff changeset
343 */
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diff changeset
344 static
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parents: 397
diff changeset
345 void compute_styled_extents_n_scaled_font(sh_stext_t *txt_o) {
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diff changeset
346 mb_text_extents_t sub_extents;
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diff changeset
347 mb_text_extents_t *extents;
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
348 mb_style_blk_t *blk;
397
55f38c2cdb8f Refactor function of computing text extents
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parents: 396
diff changeset
349 int blk_txt_len;
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parents: 396
diff changeset
350 mb_scaled_font_t *scaled_font;
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parents: 396
diff changeset
351 char *txt, saved;
393
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parents:
diff changeset
352 co_aix shift_x, shift_y;
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
353 int i;
397
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
354
55f38c2cdb8f Refactor function of computing text extents
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parents: 396
diff changeset
355 memset(&full_extents, sizeof(mb_text_extents_t), 0);
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parents: 396
diff changeset
356
393
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
357 blk = txt_o->style_blks;
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Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
358 scaled_font = txt_o->scaled_fonts;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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parents:
diff changeset
359 txt = (char *)txt_o->txt;
403
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diff changeset
360 extents = &txt_o->extents;
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
361 for(i = 0; i < txt_o->nblks; i++) {
397
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
362 shift_x = txt_o->x + full_extents.x_adv;
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
363 shift_y = txt_o->y + full_extents.y_adv;
55f38c2cdb8f Refactor function of computing text extents
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parents: 396
diff changeset
364
55f38c2cdb8f Refactor function of computing text extents
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parents: 396
diff changeset
365 *scaled_font = make_scaled_font_face(txt_o, blk->face,
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
366 shift_x, shift_y, font_sz);
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
367 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
368
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
369 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
370 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
371
397
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
372 saved = txt[blk_txt_len];
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Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
373 txt[blk_txt_len] = 0;
403
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diff changeset
374 compute_text_extents(*scaled_font, txt, extents);
397
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
375 txt[blk_txt_len] = saved;
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parents: 396
diff changeset
376
403
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parents: 397
diff changeset
377 extent_extents(&txt_o->full_extents, extents);
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parents: 397
diff changeset
378
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
379 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
380 blk++;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
381 txt += blk_txt_len;
403
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diff changeset
382 extents = &sub_extents;
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
383 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
384 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
385
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
386 /*
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
387 * 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
388 * - 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
389 * - 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
390 * - 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
391 * - 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
392 */
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
393 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
394 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
395
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
396 ASSERT(txt_o != NULL);
403
aee0f66b1154 Compute extents of a styled text
Thinker K.F. Li <thinker@branda.to>
parents: 397
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397 compute_styled_extents_n_scaled_font(txt_o);
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
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398 }
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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399
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
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400 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:
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401 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>
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402
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
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403 ASSERT(txt_o != NULL);
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
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404 }
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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405
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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406 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:
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407 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>
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408 char *new_txt;
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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409 int sz;
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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410
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
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411 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:
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412 ASSERT(txt != NULL);
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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413
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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414 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:
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415 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:
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416 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:
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417 return ERR;
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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418
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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419 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>
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420 txt_o->txt = new_txt;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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421
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Thinker K.F. Li <thinker@branda.to>
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422 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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423 }
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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424
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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425 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:
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426 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:
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427 int nblks) {
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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parents:
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428 sh_stext_t *txt_o = (sh_stext_t *)shape;
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Thinker K.F. Li <thinker@branda.to>
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429 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:
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430 co_aix *new_exts;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
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431 int sz;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
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parents:
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432
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Thinker K.F. Li <thinker@branda.to>
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433 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:
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434 ASSERT(nblks >= 0);
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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435
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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436 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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437 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:
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438 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:
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439 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:
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440 return ERR;
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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441 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:
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442
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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443 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
444 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:
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445 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:
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446 }
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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447
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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448 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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449 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:
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450
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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451 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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452 }
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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453
396
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer
Thinker K.F. Li <thinker@branda.to>
parents: 395
diff changeset
454 #endif /* SHAPE_STEXT */