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annotate src/shape_stext.c @ 405:8927814d23b5

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imported patch fix-makefile.am-clean.patch
author john.cylee@gmail.com
date Tue, 16 Jun 2009 18:20:52 +0800
parents 55f38c2cdb8f
children aee0f66b1154
rev   line source
396
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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
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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
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44 /*! \brief Find out a font pattern.
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45 *
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46 * This function use fontconfig to decide a font file in pattern. It can
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47 * replaced by other mechanism if you think it is not what you want.
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48 */
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49 static
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50 FcPattern *query_font_pattern(const char *family, int slant, int weight) {
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51 FcPattern *ptn, *p;
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52 FcValue val;
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53 FcConfig *cfg;
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54 FcBool r;
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55 static int slant_map[] = { /* from MB_FONT_SLANT_* to FC_SLANT_* */
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56 FC_SLANT_ROMAN,
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57 FC_SLANT_ROMAN,
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58 FC_SLANT_ITALIC,
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59 FC_SLANT_OBLIQUE};
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60
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61 cfg = FcConfigGetCurrent();
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62 ptn = FcPatternCreate();
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63 p = FcPatternCreate();
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64 if(ptn == NULL || p == NULL)
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65 goto err;
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66
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67 val.type = FcTypeString;
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68 val.u.s = family;
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69 FcPatternAdd(ptn, "family", &val, FcTrue);
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70
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71 val.type = FcTypeInteger;
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72 val.u.i = slant_map[slant];
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73 FcPatternAdd(ptn, "slant", &val, FcTrue);
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74
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75 val.type = FcTypeInteger;
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76 val.u.i = weight;
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77 FcPatternAdd(ptn, "weight", &val, FcTrue);
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78
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79 r = FcConfigSubstituteWithPat(cfg, ptn, NULL, FcMatchPattern);
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80 if(!r)
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81 goto err;
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82
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83 r = FcConfigSubstituteWithPat(cfg, p, ptn, FcMatchFont);
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84 if(!r)
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85 goto err;
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86
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87 FcDefaultSubstitute(p);
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88
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89 FcPatternDestroy(ptn);
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90
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91 return p;
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92
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93 err:
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94 if(ptn)
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95 FcPatternDestroy(ptn);
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96 if(p)
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97 FcPatternDestroy(p);
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98 return NULL;
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99
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100 }
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101
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102 /*! \brief Find out a font face for a pattern specified.
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103 *
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104 * The pattern, here, is a vector of family, slant, and weight.
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105 * This function base on fontconfig and cairo FreeType font supporting.
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106 * You can replace this function with other font mechanisms.
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107 */
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108 static
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109 mb_font_face_t *query_font_face(const char *family, int slant, int weight) {
395
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110 cairo_font_face_t *cface;
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111 FcPattern *ptn;
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112
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113 ptn = query_font_pattern(family, slant, weight);
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114 cface = cairo_ft_font_face_create_for_pattern(ptn);
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115 FcPatternDestroy(ptn);
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116
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117 return (mb_font_face_t *)cface;
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118 }
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119
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120 static
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121 void free_font_face(mb_font_face_t *face) {
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122 ASSERT(face == NULL);
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123
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124 cairo_font_face_destroy((cairo_font_face_t *)face);
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125 }
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126
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127 /*! \brief This is scaled font for specified size and extent.
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128 *
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129 * Font face only specified which font would be used to draw text
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130 * message. But, it also need to scale glyphs to specified size and
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131 * rotation. This function return a scaled font specified by a
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132 * matrix that transform glyph from design space of the font to
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133 * user space of cairo surface.
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134 */
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135 static
397
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136 mb_scaled_font_t *make_scaled_font_face_matrix(mb_font_face_t *face,
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137 co_aix *matrix) {
395
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138 cairo_font_face_t *scaled_font;
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139 cairo_matrix_t font_matrix;
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140 static cairo_matir_t id = {
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141 1, 0,
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142 0, 1,
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143 0, 0
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144 };
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145 static cairo_font_options_t *opt = NULL;
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146
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147 ASSERT(matrix != NULL);
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148
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149 if(opt == NULL) {
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150 opt = cairo_font_options_create();
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151 if(opt == NULL)
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152 return NULL;
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153 }
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154
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155 font_matrix.xx = *matrix++;
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156 font_matrix.xy = *matrix++;
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157 font_matrix.x0 = *matrix++;
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158 font_matrix.yx = *matrix++;
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159 font_matrix.yy = *matrix++;
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160 font_matrix.y0 = *matrix;
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161 scaled_font = cairo_scaled_font_create((cairo_font_face_t *)face,
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162 &font_matrix,
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163 &id, opt);
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164
396
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165 return (mb_scaled_font_t *)scaled_font;
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166 }
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167
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168 static
397
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169 void scaled_font_free(mb_scaled_font_t *scaled_font) {
396
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170 cairo_scaled_font_destroy((cairo_scaled_font_t *)scaled_font);
395
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171 }
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172
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173 static
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174 void compute_text_extents(mb_scaled_font_t *scaled_font, const char *txt,
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175 mb_text_extents_t *extents) {
396
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176 cairo_scaled_font_text_extents((cairo_scaled_font_t *)scaled_font,
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177 txt,
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178 (cairo_text_extents_t *)extents);
395
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179 }
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180
396
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181 static
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182 mb_text_extents_t *mb_text_extents_new(void) {
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183 cairo_text_extents_t *extents;
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184
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185 extents = (cairo_text_extents_t *)malloc(sizeof(cairo_text_extents_t));
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186 return extents;
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187 }
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188
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189 static
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190 void mb_text_extents_free(mb_text_extents_t *extents) {
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191 free(extents);
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192 }
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193
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194 /* @} */
395
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195
393
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196 /*! \brief Query and return a font face for a specified attribute vector.
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197 *
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198 * Programmers use mb_font_face_t to specify fonts used to show a
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199 * block of text on the output device. They can get mb_font_face_t with
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200 * this function. The objects return by mb_font_face_query() should be
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201 * freed with mb_font_face_free() when they are not more used.
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202 *
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203 * \param family is the name of a font family (times).
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204 * \param slant is one of \ref MB_FONT_SLANTS.
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205 * \param weight decides if a font is thin or heavy.
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206 */
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207 mb_font_face_t *mb_font_face_query(redraw_man_t *rdman,
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208 const char *family,
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209 int slant,
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210 int weight) {
396
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211 return query_font_face(family, slant, weight);
393
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212 }
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213
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214 void mb_font_face_free(mb_font_face_t *face) {
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215 ASSERT(face != NULL);
396
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216 free_font_face(face);
393
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217 }
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218
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219 /*! \brief A simple implementation of text shape.
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220 *
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221 */
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222 typedef struct _sh_stext {
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223 shape_t shape;
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224 const char *txt; /*!< \brief Text to be showed */
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225 const mb_style_blk_t *style_blks; /*!< \brief Style of text */
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226 int nblks; /*!< \brief Number of style blocks */
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227 int max_nblks;
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228 co_aix x, y;
396
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229 mb_scaled_font_t **scaled_fonts;
393
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230 } sh_stext_t;
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231
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232 shape_t *rdman_shape_stext_new(redraw_man_t *rdman, co_aix x, co_aix y,
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233 const char *txt) {
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234 sh_stext_t *txt_o;
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235
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236 ASSERT(txt != NULL);
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237
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238 txt_o = (sh_stext_t *)malloc(sizeof(sh_stext_t));
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239 if(txt_o == NULL)
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240 return NULL;
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241
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242 memset(&txt_o->shape, 0, sizeof(shape_t));
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243 mb_obj_init(txt_o, MBO_STEXT);
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244
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245 txt_o->txt = strdup(txt);
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246 txt_o->style_blks = NULL;
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247 txt_o->nblks = 0;
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248 txt_o->max_nblks = 0;
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249 txt_o->x = x;
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250 txt_o->y = y;
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251 txt_o->exts = NULL;
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252
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253 if(txt_o->txt == NULL) {
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254 free(txt_o);
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255 txt_o = NULL;
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256 }
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257
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258 return (shape_t *)txt_o;
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259 }
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260
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261 static
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262 int compute_utf8_chars_sz(const char *txt, int n_chars) {
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263 int i;
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264 const char *p = txt;
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265
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266 for(i = 0; i < n && *p; i++) {
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
267 if(*p++ & 0x80)
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
268 continue; /* single byte */
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
269 /* multi-bytes */
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
270 while(*p && ((*p & 0xc0) == 0x80))
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
271 p++;
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 if(i < n)
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
274 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
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 return p - txt;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
277 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
278
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
279 static
397
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
280 mb_scaled_font_t *make_scaled_font_face(sh_stext_t *txt_o,
393
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_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
282 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
283 co_aix font_sz) {
397
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
284 co_aix matrix[6], scaled_matrix[6];
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
285 co_aix *aggr;
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
286 mb_scaled_font_t *scaled;
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
287
397
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
288 aggr = sh_get_aggr_matrix((shape_t *)txt_o);
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
289 matrix[0] = font_sz;
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
290 matrix[1] = 0;
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
291 matrix[2] = shift_x;
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
292 matrix[3] = 0;
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
293 matrix[4] = font_sz;
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
294 matrix[5] += shift_y;
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
295 matrix_mul(aggr, matrix, scaled_matrix);
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
296
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
297 scaled = make_scaled_font_face_matrix(face, scaled_matrix);
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
298
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
299 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
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
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
302 static
397
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
303 void compute_styled_extents(sh_stext_t *txt_o) {
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
304 mb_text_extents_t sub_extents, full_extents;
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
305 mb_text_extents_t *ext;
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
306 mb_style_blk_t *blk;
397
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
307 int blk_txt_len;
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
308 mb_scaled_font_t *scaled_font;
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
309 char *txt, saved;
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
310 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
311 int i;
397
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
312
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
313 memset(&full_extents, sizeof(mb_text_extents_t), 0);
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
314
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
315 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
316 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
317 txt = (char *)txt_o->txt;
397
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
318 ext = &full_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
319 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
320 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
321 shift_y = txt_o->y + full_extents.y_adv;
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
322
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
323 *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
324 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
325 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
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 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
328 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
329
397
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
330 saved = txt[blk_txt_len];
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
331 txt[blk_txt_len] = 0;
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
332 compute_text_extents(scaled_font, txt, &extents);
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
333 txt[blk_txt_len] = saved;
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
334
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
335 adv_x += MBE_GET_X_ADV(&extents);
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
336 adv_y += MBE_GET_Y_ADV(&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
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 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
339 blk++;
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
340 txt += blk_txt_len;
397
55f38c2cdb8f Refactor function of computing text extents
Thinker K.F. Li <thinker@branda.to>
parents: 396
diff changeset
341 ext = &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
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 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
344
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 * 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
347 * - 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
348 * - 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
349 * - 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
350 * - 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
351 */
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
352 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
353 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
354
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
355 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
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
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
358 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
359 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
360
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
361 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
362 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
363
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
364 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
365 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
366 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
367 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
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 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
370 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
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 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
373 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
374 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
375 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
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 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
378 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
379
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
380 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
381 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
382
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
383 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
384 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
385 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
386 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
387 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
388 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
389 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
390
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
391 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
392 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
393
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
394 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
395 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
396 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
397 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
398 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
399 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
400
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
401 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
402 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
403 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
404 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
405
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
406 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
407 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
408
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
409 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
410 }
27774b93521e Add sh_stext_t to implement a simple version of text shape.
Thinker K.F. Li <thinker@branda.to>
parents:
diff changeset
411
396
7fe0b1ee92b6 Add extents supporting into Fontconfig and FreeType Layer
Thinker K.F. Li <thinker@branda.to>
parents: 395
diff changeset
412 #endif /* SHAPE_STEXT */