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annotate include/mb_shapes.h @ 390:3c3de5520e37

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author wycc
date Sun, 12 Apr 2009 12:02:03 +0800
parents 3e84458968ec
children 27774b93521e
rev   line source
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1 /*! \file
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2 * \brief Declare interfaces of shapes.
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3 *
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4 * \todo Add ellipse shape.
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5 * \todo Add circle shape.
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6 */
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7 #ifndef __SHAPES_H_
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8 #define __SHAPES_H_
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9
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10 #include <cairo.h>
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11 #include "mb_types.h"
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12 #include "mb_redraw_man.h"
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13 #include "mb_img_ldr.h"
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14 #include <pango/pangocairo.h>
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15
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16 /*! \page define_shape How to Define Shapes
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17 *
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18 * A shape implementation must include
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19 * - rdman_shape_*_new()
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20 * - clear memory for shape_t member.
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21 * - assign *_free() to \ref shape_t::free.
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22 * - make new object been managed by a redraw manager.
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23 * - call rdman_shape_man()
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24 * - *_free()
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25 * - assigned to \ref shape_t::free.
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26 * - *_transform()
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27 * - *_draw()
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28 * - *_draw() is responsive to define shape. How the shape is filled
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29 * or stroked is defined by paint.
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30 * - first member variable of a shape type must be a shape_t.
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31 *
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32 * Must modify
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33 * - event.c::draw_shape_path()
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34 * - redraw_man.c::clean_shape()
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35 * - redraw_man.c::draw_shape()
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36 *
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37 * \section shape_transform Shape Transform
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38 *
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39 * All shape types must have a shape transform function. It is invoked by
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40 * redraw_man.c::clean_shape(). It's task is to update \ref geo_t of the
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41 * shape object. In most situtation, it call geo_from_positions() to
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42 * update geo_t.
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43 *
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44 */
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45
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46 /*! \defgroup shapes Shapes
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47 * @{
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48 */
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49
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50 /*! \defgroup shape_path Shape of Path
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51 * @{
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52 */
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53 extern shape_t *rdman_shape_path_new(redraw_man_t *rdman, char *data);
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54 extern shape_t *rdman_shape_path_new_from_binary(redraw_man_t *rdman, char *commands, co_aix *arg,int arg_cnt,int *fix_arg,int fix_arg_cnt);
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55 extern void sh_path_transform(shape_t *shape);
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56 extern void sh_path_draw(shape_t *shape, cairo_t *cr);
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57 /* @} */
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59 /*! \defgroup shape_text Shape of Text
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60 * @{
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61 */
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62 extern shape_t *rdman_shape_text_new(redraw_man_t *rdman,
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63 const char *txt, co_aix x, co_aix y,
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64 co_aix font_size,
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65 cairo_font_face_t *face,PangoAttrList *attrs);
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66 /*! \brief Change the content of the text element.
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67 * In the SVG, the content of a text tag can be composed of several tspan inside it. The Madbutterfly parser will collect all content of a
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68 * text segement as a single string. The attribute of these characters are saved in a seperate data structure. In the program level, we will
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69 * not keep the SVG text tree. Instead, all attributes will be expanded into a list.
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70 *
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71 * When you change the content of a text element, please remember that the attributes will not be removed by the way. You need to change
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72 * them seperately.
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73 *
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74 */
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75 extern void sh_text_set_text(shape_t *shape, const char *txt);
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76
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77 extern void sh_text_transform(shape_t *shape);
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78 extern void sh_text_draw(shape_t *shape, cairo_t *cr);
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79 /* @} */
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80
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81 /*! \defgroup mb_text_t Shape of Text
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82 * @{
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83 */
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84 #define TEXTSTYLE_BOLD 1
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85 #define TEXTSTYLE_ITALIC 2
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86 #define TEXTSTYLE_UNDERLINE 4
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87 #define TEXTSTYLE_COLOR 8
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88 #define TEXTSTYLE_FONT 0x10
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89 #define TEXTSTYLE_ALIGN 0x20
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91
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92 #define TEXTALIGN_START 1
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93 #define TEXTALIGN_MIDDLE 2
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94 #define TEXTALIGN_END 3
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96 typedef struct {
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97 int property;
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98 unsigned int color;
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99 unsigned int align;
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100 char *font;
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101 } mb_textstyle_t;
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102
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103 typedef struct _textsegment {
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104 int x;
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105 int y;
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106 mb_textstyle_t style;
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107 int size;
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108 char *buf;
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109 struct _textsegment *next;
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110 } mb_text_segment_t;
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111
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112 #define MBTEXT_DIRTY 1
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113
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114 typedef struct {
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115 int nseg;
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116 mb_text_segment_t *segs;
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117 int flag;
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118 cairo_surface_t *surface;
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119 } mb_text_t;
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120
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121 /*! \brief Change the style of the text.
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122 *
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123 * This function can add a couple of attributes to a segment of text or the whole text field. If the @end is -1, the attributes
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124 * will be applied to the whole text field. The @style should be initialized by using the mb_textstyle_xxx functions. All attributes
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125 * which is not initialized will not be changed. It means that the @style will be added into all existing style instead of reaplcing
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126 * it.
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127 */
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128 extern void sh_text_set_style(shape_t *shape,int begin,int end,mb_textstyle_t *format);
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129 /*! \brief Change the color of the text field
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130 * Change the color of the whole text field. This will removed all existing color attribute. If you want to change part of the text
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131 * field only, please use the sh_text_set_style instead.
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132 */
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133 extern void sh_text_set_color(shape_t *shape, unsigned color);
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134 /*! \brief Turn on/off the bold attribute.
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135 * Turn on/off the font weight of the whole text field. This will removed all existing bold setting. If you want to change part of the text
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136 * field only, please use the sh_text_set_style instead.
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137 */
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138 extern void sh_text_set_bold(shape_t *shape, int bold);
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139 /*! \brief Turn on/off the italic attribute.
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140 * Turn on/off the italic of the whole text field. This will removed all existing italic setting. If you want to change part of the text
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141 * field only, please use the sh_text_set_style instead.
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142 */
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143 extern void sh_text_set_italic(shape_t *shape, int italic);
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144 /*! \brief Turn on/off the underline attribute.
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145 * Turn on/off the underline of the whole text field. This will removed all existing underline setting. If you want to change part of the text
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146 * field only, please use the sh_text_set_style instead.
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147 */
292
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148 extern void sh_text_set_underline(shape_t *shape, int underline);
293
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149 /*! \brief Change the font of the text field.
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150 * Change the font of the whole text field. This will removed all existing underline setting. If you want to change part of the text
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151 * field only, please use the sh_text_set_style instead.
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152 */
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153 extern void sh_text_set_font(shape_t *shape, char *family);
293
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154 /*! \brief Init the text style data structure.
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155 *
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156 * This is usually used to initialize the mb_textstyle_t which is allocate in the stack. It will mark all property as undefined. All undefined
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157 * property will not change when the sh_text_set_style is called.
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158 *
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159 */
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160 static inline void mb_textstyle_init(mb_textstyle_t *style)
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161 {
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162 style->property = 0;
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163 }
278
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164 extern void mb_textstyle_set_font(mb_textstyle_t *style, char *font);
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165 static inline char *mb_textstyle_get_font(mb_textstyle_t *style)
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166 {
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167 if (style->property & TEXTSTYLE_FONT)
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168 return style->font;
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169 else
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170 return NULL;
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171 }
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172 extern void mb_textstyle_set_bold(mb_textstyle_t *style, int bold);
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173 static inline int mb_textstyle_get_bold(mb_textstyle_t *style)
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174 {
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175 return style->property & TEXTSTYLE_BOLD;
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176 }
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177 extern void mb_textstyle_set_italic(mb_textstyle_t *style, int italic);
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178 static inline int mb_textstyle_get_italic(mb_textstyle_t *style)
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179 {
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180 return style->property & TEXTSTYLE_ITALIC;
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181 }
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182 extern void mb_textstyle_set_underline(mb_textstyle_t *style, int underline);
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183 static inline int mb_textstyle_get_undeline(mb_textstyle_t *style)
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184 {
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185 return style->property & TEXTSTYLE_UNDERLINE;
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186 }
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187 #define TEXTCOLOR_RED(c) (((c)&0xff0000)>>16)
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188 #define TEXTCOLOR_GREEN(c) (((c)&0xff00)>>8)
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189 #define TEXTCOLOR_BLUE(c) (((c)&0xff))
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190 #define TEXTCOLOR_RGB(r,g,b) (((r)<<16)|((g)<<8)|(b))
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191 static inline void mb_textstyle_set_color(mb_textstyle_t *style, unsigned int color)
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192 {
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193 style->property |= TEXTSTYLE_COLOR;
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194 style->color = color;
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195 }
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196 static inline unsigned int mb_textstyle_get_color(mb_textstyle_t *style)
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197 {
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198 if (style->property & TEXTSTYLE_COLOR)
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199 return style->color;
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200 else
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201 return 0;
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202 }
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203
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204 static inline int mb_textstyle_has_color(mb_textstyle_t *style)
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205 {
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206 return style->property & TEXTSTYLE_COLOR;
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207 }
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208 extern void mb_textstyle_set_alignment(mb_textstyle_t *style, int alignment);
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209 extern int mb_textstyle_get_alignment(mb_textstyle_t *style);
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210
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211
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212
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213 extern void mb_text_set_style(mb_text_t *text, int begin,int end,mb_textstyle_t *style);
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214 extern void mb_text_get_style(mb_text_t *text, int n,mb_textstyle_t *style);
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215 extern void mb_text_set_text(mb_text_t *text, char *string,int begin,int end);
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216 extern void mb_text_get_text(mb_text_t *text, int begin,int end, char *string);
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217
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218
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219 /* @} */
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220
101
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221 /*! \defgroup shape_rect Shape of Rectangle
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222 * @{
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223 */
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224 extern shape_t *rdman_shape_rect_new(redraw_man_t *rdman,
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225 co_aix x, co_aix y,
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226 co_aix w, co_aix h,
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227 co_aix rx, co_aix ry);
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228 extern void sh_rect_transform(shape_t *shape);
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229 extern void sh_rect_draw(shape_t *shape, cairo_t *cr);
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230 extern void sh_rect_set(shape_t *shape, co_aix x, co_aix y,
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231 co_aix w, co_aix h, co_aix rx, co_aix ry);
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232 /* @} */
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233
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234 /*! \defgroup shape_image Shape of Image
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235 * @{
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236 */
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237 extern shape_t *rdman_shape_image_new(redraw_man_t *rdman,
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238 co_aix x, co_aix y,
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239 co_aix w, co_aix h);
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240 extern void sh_image_transform(shape_t *shape);
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241 extern void sh_image_draw(shape_t *shape, cairo_t *cr);
265
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242 extern void sh_image_set_geometry(shape_t *shape, co_aix x, co_aix y,
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243 co_aix w, co_aix h);
257
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244 /* @} */
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245 /* @} */
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246
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247 #endif /* __SHAPES_H_ */