Mercurial > molko
view libcore/core/debug.h @ 131:c679e08b32b2
molko: fix startup
author | David Demelier <markand@malikania.fr> |
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date | Wed, 07 Oct 2020 09:37:28 +0200 |
parents | 789b23e01f52 |
children | c46f80820b42 |
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/* * debug.h -- debugging interfaces * * Copyright (c) 2020 David Demelier <markand@malikania.fr> * * Permission to use, copy, modify, and/or distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #ifndef MOLKO_DEBUG_H #define MOLKO_DEBUG_H /** * \file debug.h * \brief Debugging interfaces. * * This module provides functions to draw debugging information within the game * window. It is mostly used for information only when state of the game is * better inspected via direct window information rather than writing in the * console. * * Predefined core states may print debugging information if * debug_options.enabled variable is set to true. However, you need to specify * the font to use in order to work. * * Each call to \ref debug_printf or \ref debug_vprintf automatically adjust * next coordinate for rendering the text. As such, user may simply print * several lines of text without having to deal with that manually. * * Example, activate global debugging. * * \code * struct font *f = font_openf("foo.ttf", 10); * * if (!f) * error_fatal(); * * debug_options.default_font = f; * debug_options.enabled = true; * \endcode * * Example, print debugging information manually. * * \code * struct debug_report report = { * .color = 0x00ff00ff, * .font = myfont // Optional if debug_options.default_font is set. * }; * * debug_printf("current position: %d, %d\n", x, y); * \endcode */ #include <stdbool.h> #include <stdarg.h> #include "font.h" /** * Maximum content length per report. */ #define DEBUG_LINE_MAX 1024 /** * \brief Debugging options. * * Fill this structure with appropriate values to change debugging behavior * in core API. */ struct debug_options { struct font *default_font; /*!< (RW) Default font for reports. */ enum font_style default_style; /*!< (RW) Default font style. */ unsigned long default_color; /*!< (RW) Default font color. */ bool enable; /*!< (RW) Enable core API debugging. */ }; /** * \brief Debug context. * * Use this structure each time you need to print one or more messages. */ struct debug_report { struct font *font; /*!< (RW) Font to use. */ enum font_style style; /*!< (RW) Font style to use. */ unsigned long color; /*!< (RW) Font foreground color to use. */ unsigned int count; /*!< (PV) Number of messages already printed. */ }; /** * Global debugging options. */ extern struct debug_options debug_options; /** * Convenient macro to initialize \ref debug_report with default values. */ #define DEBUG_INIT_DEFAULTS { \ .font = debug_options.default_font, \ .color = debug_options.default_color, \ .style = debug_options.default_style \ } /** * Print debugging information into the screen. * * \pre report != NULL * \pre fmt != NULL * \param report the reporting context * \param fmt the printf(3) format string * \note The message length must not exceed DEBUG_LINE_MAX, otherwise its * result is truncated. */ void debug_printf(struct debug_report *report, const char *fmt, ...); /** * Similar to \ref debug_printf but with a va_list object. * * \see \ref debug_printf */ void debug_vprintf(struct debug_report *report, const char *fmt, va_list ap); #endif /* !MOLKO_DEBUG_H */