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author Thinker K.F. Li <thinker@codemud.net>
date Tue, 03 May 2011 12:48:08 +0800
parents bae104d8d247
children
rev   line source
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1 // -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*-
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2 // vim: sw=4:ts=8:sts=4
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3 /*! \file
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4 * \brief Declare interfaces of shapes.
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5 *
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6 * \todo Add ellipse shape.
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7 * \todo Add circle shape.
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8 */
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9 #ifndef __SHAPES_H_
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10 #define __SHAPES_H_
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11
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12 #include "mb_config.h"
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13
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14 #ifdef SH_TEXT
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15 #include <pango/pangocairo.h>
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16 #endif
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17
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18 #include "mb_graph_engine.h"
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19 #include "mb_types.h"
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20 #include "mb_redraw_man.h"
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21 #include "mb_img_ldr.h"
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22
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23 /*! \page define_shape How to Define Shapes
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24 *
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25 * A shape implementation must include
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26 * - rdman_shape_*_new()
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27 * - clear memory for shape_t member.
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28 * - mb_obj_init() to initialize shape_t::obj.
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29 * - assign *_free() to \ref shape_t::free.
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30 * - make new object been managed by a redraw manager.
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31 * - call rdman_man_shape()
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32 * - *_free()
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33 * - assigned to \ref shape_t::free.
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34 * - *_transform()
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35 * - *_draw()
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36 * - *_draw() is responsive to define shape. How the shape is filled
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37 * or stroked is defined by paint.
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38 * - first member variable of a shape type must be a shape_t.
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39 *
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40 * Must modify
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41 * - event.c::draw_shape_path()
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42 * - redraw_man.c::clean_shape()
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43 * - redraw_man.c::draw_shape()
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44 *
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45 * \section shape_transform Shape Transform
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46 *
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47 * All shape types must have a shape transform function. It is invoked by
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48 * redraw_man.c::clean_shape(). It's task is to update \ref geo_t of the
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49 * shape object. In most situtation, it call geo_from_positions() to
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50 * update geo_t.
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51 *
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52 * \section rdman_man_shape Make a redraw manager managing a shape.
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53 *
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54 * It means managing life cycle of a shape to make a redraw manager
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55 * managing a shape. Shapes are referenced by a redraw manager to
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56 * update output device. So, a redraw manager must make sure all
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57 * shapes are valid when they are needed to update output. To make sure
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58 * lifecycle of shapes are synchronized with status of a redraw manager,
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59 * lifecycle of shapes are managed by associated redraw manager.
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60 *
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61 */
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62
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63 /*! \defgroup shapes Shapes
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64 * @{
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65 */
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66
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67 /*! \defgroup shape_path Shape of Path
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68 * @{
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69 */
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70 extern shape_t *rdman_shape_path_new(redraw_man_t *rdman, const char *data);
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71 extern shape_t *rdman_shape_path_new_from_binary(redraw_man_t *rdman,
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72 char *commands,
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73 co_aix *pnts,
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74 int pnt_cnt,
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75 co_aix *float_args,
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76 int float_arg_cnt);
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77 extern shape_t *rdman_shape_path_clone(redraw_man_t *rdman,
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78 const shape_t *src_path);
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79 extern void sh_path_transform(shape_t *shape);
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80 extern void sh_path_draw(shape_t *shape, mbe_t *cr);
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81 /* @} */
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82
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83 #ifdef SH_TEXT
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84 /*! \defgroup shape_text Shape of Text
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85 * @{
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86 */
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87 extern shape_t *rdman_shape_text_new(redraw_man_t *rdman,
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88 const char *txt, co_aix x, co_aix y,
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89 co_aix font_size,
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90 mbe_font_face_t *face,PangoAttrList *attrs);
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91 /*! \brief Change the content of the text element.
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92 * 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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93 * 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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94 * not keep the SVG text tree. Instead, all attributes will be expanded into a list.
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95 *
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96 * 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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97 * them seperately.
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98 *
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99 */
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100 extern void sh_text_set_text(shape_t *shape, const char *txt);
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101
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102 extern void sh_text_transform(shape_t *shape);
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103 extern void sh_text_draw(shape_t *shape, mbe_t *cr);
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104 /* @} */
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105 #endif
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106
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107 /*! \defgroup mb_text_t Shape of Text
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108 * @{
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109 */
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110 #define TEXTSTYLE_BOLD 1
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111 #define TEXTSTYLE_ITALIC 2
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112 #define TEXTSTYLE_UNDERLINE 4
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113 #define TEXTSTYLE_COLOR 8
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114 #define TEXTSTYLE_FONT 0x10
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115 #define TEXTSTYLE_ALIGN 0x20
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116
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117
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118 #define TEXTALIGN_START 1
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119 #define TEXTALIGN_MIDDLE 2
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120 #define TEXTALIGN_END 3
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121
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122 typedef struct {
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123 int property;
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124 unsigned int color;
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125 unsigned int align;
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126 char *font;
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127 } mb_textstyle_t;
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128
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129 typedef struct _textsegment {
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130 int x;
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131 int y;
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132 mb_textstyle_t style;
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133 int size;
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134 char *buf;
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135 struct _textsegment *next;
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136 } mb_text_segment_t;
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137
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138 #define MBTEXT_DIRTY 1
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139
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140 typedef struct {
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141 int nseg;
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142 mb_text_segment_t *segs;
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143 int flag;
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144 mbe_surface_t *surface;
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145 } mb_text_t;
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146
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147 /*! \brief Change the style of the text.
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148 *
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149 * 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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150 * 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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151 * 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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152 * it.
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153 */
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154 extern void sh_text_set_style(shape_t *shape,int begin,int end,mb_textstyle_t *format);
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155 /*! \brief Change the color of the text field
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156 * Change the color of the whole text field. This will removed all existing color attribute. If you want to change part of the text
293
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157 * field only, please use the sh_text_set_style instead.
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158 */
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159 extern void sh_text_set_color(shape_t *shape, unsigned color);
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160 /*! \brief Turn on/off the bold attribute.
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161 * 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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162 * field only, please use the sh_text_set_style instead.
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163 */
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164 extern void sh_text_set_bold(shape_t *shape, int bold);
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165 /*! \brief Turn on/off the italic attribute.
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166 * 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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167 * field only, please use the sh_text_set_style instead.
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168 */
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169 extern void sh_text_set_italic(shape_t *shape, int italic);
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170 /*! \brief Turn on/off the underline attribute.
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171 * 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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172 * field only, please use the sh_text_set_style instead.
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173 */
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174 extern void sh_text_set_underline(shape_t *shape, int underline);
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175 /*! \brief Change the font of the text field.
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176 * 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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177 * field only, please use the sh_text_set_style instead.
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178 */
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179 extern void sh_text_set_font(shape_t *shape, char *family);
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180 /*! \brief Init the text style data structure.
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181 *
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182 * 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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183 * property will not change when the sh_text_set_style is called.
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184 *
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185 */
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186 static inline void mb_textstyle_init(mb_textstyle_t *style)
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187 {
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188 style->property = 0;
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189 }
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190 /*! \brief Get the dimension of the text
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191 */
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192 extern void sh_text_get_size(shape_t *sh, int *w, int *h);
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193 extern void mb_textstyle_set_font(mb_textstyle_t *style, char *font);
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194 static inline char *mb_textstyle_get_font(mb_textstyle_t *style)
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195 {
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196 if (style->property & TEXTSTYLE_FONT)
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197 return style->font;
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198 else
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199 return NULL;
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200 }
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201 extern void mb_textstyle_set_bold(mb_textstyle_t *style, int bold);
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202 static inline int mb_textstyle_get_bold(mb_textstyle_t *style)
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203 {
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204 return style->property & TEXTSTYLE_BOLD;
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205 }
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206 extern void mb_textstyle_set_italic(mb_textstyle_t *style, int italic);
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207 static inline int mb_textstyle_get_italic(mb_textstyle_t *style)
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208 {
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209 return style->property & TEXTSTYLE_ITALIC;
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210 }
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211 extern void mb_textstyle_set_underline(mb_textstyle_t *style, int underline);
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212 static inline int mb_textstyle_get_undeline(mb_textstyle_t *style)
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213 {
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214 return style->property & TEXTSTYLE_UNDERLINE;
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215 }
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216 #define TEXTCOLOR_RED(c) (((c)&0xff0000)>>16)
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217 #define TEXTCOLOR_GREEN(c) (((c)&0xff00)>>8)
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218 #define TEXTCOLOR_BLUE(c) (((c)&0xff))
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219 #define TEXTCOLOR_RGB(r,g,b) (((r)<<16)|((g)<<8)|(b))
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220 static inline void mb_textstyle_set_color(mb_textstyle_t *style, unsigned int color)
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221 {
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222 style->property |= TEXTSTYLE_COLOR;
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223 style->color = color;
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224 }
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225 static inline unsigned int mb_textstyle_get_color(mb_textstyle_t *style)
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226 {
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227 if (style->property & TEXTSTYLE_COLOR)
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228 return style->color;
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229 else
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230 return 0;
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231 }
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232
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233 static inline int mb_textstyle_has_color(mb_textstyle_t *style)
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234 {
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235 return style->property & TEXTSTYLE_COLOR;
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236 }
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237 extern void mb_textstyle_set_alignment(mb_textstyle_t *style, int alignment);
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238 extern int mb_textstyle_get_alignment(mb_textstyle_t *style);
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239
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240
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241
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242 extern void mb_text_set_style(mb_text_t *text, int begin,int end,mb_textstyle_t *style);
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243 extern void mb_text_get_style(mb_text_t *text, int n,mb_textstyle_t *style);
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244 extern void mb_text_set_text(mb_text_t *text, char *string,int begin,int end);
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245 extern void mb_text_get_text(mb_text_t *text, int begin,int end, char *string);
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246
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247 /* @} */
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248
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249 /*! \defgroup shape_rect Shape of Rectangle
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250 * @{
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251 */
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252 extern shape_t *rdman_shape_rect_new(redraw_man_t *rdman,
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253 co_aix x, co_aix y,
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254 co_aix w, co_aix h,
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255 co_aix rx, co_aix ry);
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256 extern shape_t *rdman_shape_rect_clone(redraw_man_t *rdman,
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257 const shape_t *src_rect);
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258 extern void sh_rect_transform(shape_t *shape);
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259 extern void sh_rect_draw(shape_t *shape, mbe_t *cr);
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260 extern void sh_rect_set(shape_t *shape, co_aix x, co_aix y,
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261 co_aix w, co_aix h, co_aix rx, co_aix ry);
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262 /* @} */
257
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263
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264 /*! \defgroup shape_image Shape of Image
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265 * @{
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266 */
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267 extern shape_t *rdman_shape_image_new(redraw_man_t *rdman,
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268 co_aix x, co_aix y,
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269 co_aix w, co_aix h);
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270 extern shape_t *rdman_shape_image_clone(redraw_man_t *rdman,
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271 const shape_t *src_img);
257
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272 extern void sh_image_transform(shape_t *shape);
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273 extern void sh_image_draw(shape_t *shape, mbe_t *cr);
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274 extern void sh_image_set_geometry(shape_t *shape, co_aix x, co_aix y,
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275 co_aix w, co_aix h);
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276 /* @} */
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277
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278 /*! \defgroup shape_stext Shape of Simple Text
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279 * @{
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280 */
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281
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282 /*! \defgroup font_face Define font face used to describe style of text.
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283 * @{
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284 */
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285 /*! \brief Font face of MadButterfly.
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286 *
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287 * It actully a mbe_font_face_t, now. But, it can be change for latter.
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288 * So, programmer should not depend on mbe_font_face_t.
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289 */
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290 typedef struct _mb_font_face mb_font_face_t;
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291
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292 enum MB_FONT_SLANTS {
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293 MB_FONT_SLANT_DUMMY,
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294 MB_FONT_SLANT_ROMAN,
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295 MB_FONT_SLANT_ITALIC,
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296 MB_FONT_SLANT_OBLIQUE,
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297 MB_FONT_SLANT_MAX
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298 };
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299
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300 extern mb_font_face_t *mb_font_face_query(redraw_man_t *rdman,
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301 const char *family,
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302 int slant,
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303 int weight);
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304 extern void mb_font_face_free(mb_font_face_t *face);
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305 /* @} */
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306
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307 /*! \brief Describe style of a block of text.
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308 *
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309 * \ref sh_stext_t describes style of a text by a list of
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310 * \ref mb_style_blk_t.
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311 */
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312 typedef struct {
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313 int n_chars;
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314 mb_font_face_t *face;
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315 co_aix font_sz;
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316 } mb_style_blk_t;
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317
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318 extern shape_t *rdman_shape_stext_new(redraw_man_t *rdman,
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319 const char *txt,
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320 co_aix x, co_aix y);
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321 extern shape_t *rdman_shape_stext_clone(redraw_man_t *rdman,
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322 const shape_t *_src_txt);
393
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323 extern void sh_stext_transform(shape_t *shape);
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324 extern void sh_stext_draw(shape_t *shape, mbe_t *cr);
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325 extern int sh_stext_set_text(shape_t *shape, const char *txt);
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326 extern int sh_stext_set_style(shape_t *shape,
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327 const mb_style_blk_t *blks,
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328 int nblks);
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329
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330 /* @} */
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331 /* @} */
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332
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333 #endif /* __SHAPES_H_ */