annotate dox/first_program.h @ 580:7bfeccdc91cb openvg

Encapsulate information of OpenVG objects in structures. The idea is to encapsulate information of OpenVG in structures to adapt OpenVG to Graphic Engine API defined by MadButterfly.
author Thinker K.F. Li <thinker@branda.to>
date Thu, 17 Jun 2010 10:41:53 +0800
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1 /*! \page first_program Your First MadButterfly Program.
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2 *
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3 * MadButterfly use SVG as a media to adapt gap between GUI designers
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4 * and application programmmers. Designers export their works with SVG
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5 * format. Then some ones, designers or programmers, assign IDs to SVG tags
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6 * that will be manipulated by application. For example, you have a menu
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7 * that should be hidden at beginning. When user hit a button, the menu
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8 * should be showed. So, we assign an ID to the group or other tags that
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9 * contain all elements in menu. The ID is the name of a object that
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10 * application manipulate, hide and show it.
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11 *
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12 * After assigning IDs to tags, the file is translated by svg2code.py.
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13 * Outputs of svg2code.py are M4 macro files. Conventional, foo.svg is
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14 * translated a M4 file as foo.mb, using .mb as extension of file name.
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15 * Macro files are translate to *.c and *.h files to link with application
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16 * programs.
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17 *
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18 * For example, to translate foo.svg with steps
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19 * - \$(PREFIX)/bin/svg2code.py foo.svg foo.mb
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20 * - m4 -I \$(PREFIX)/share/mb mb_c_source.m4 foo.mb > foo.c
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21 * - m4 -I \$(PREFIX)/share/mb mb_c_header.m4 foo.mb > foo.h
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22 *
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23 * foo.h declares a structure, named 'foo' and two functions,
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24 * foo_new() and foo_free(). An instance of 'foo' holds all objects for
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25 * foo.svg. One object, with specified ID as name, for each tag. If you
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26 * don't assign one, a random one is picked. foo_new() is invoked to create
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27 * and initialize a 'foo' instance. An instance is released by calling
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28 * foo_free().
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29 *
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30 * \dontinclude examples/svg2code_ex/main.c
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31 * \skip main
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32 * \until }
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33 */