ascension: src/ascension/context.h@30b12e88fd84

     1 /*

     2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

     3  * Copyright 2023 Mike Becker. All rights reserved.

     4  *

     5  * Redistribution and use in source and binary forms, with or without

     6  * modification, are permitted provided that the following conditions are met:

     7  *

     8  *   1. Redistributions of source code must retain the above copyright

     9  *      notice, this list of conditions and the following disclaimer.

    10  *

    11  *   2. Redistributions in binary form must reproduce the above copyright

    12  *      notice, this list of conditions and the following disclaimer in the

    13  *      documentation and/or other materials provided with the distribution.

    14  *

    15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

    16  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

    18  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE

    19  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

    20  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

    21  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

    22  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    23  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

    24  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

    25  * POSSIBILITY OF SUCH DAMAGE.

    26  */

    28 #ifndef ASCENSION_CONTEXT_H

    29 #define ASCENSION_CONTEXT_H

    31 #include "datatypes.h"

    32 #include "window.h"

    33 #include "font.h"

    35 #include <cx/buffer.h>

    36 #include <cx/list.h>

    38 /** The flag for the overall initialized state. */

    39 #define ASC_FLAG_INITILIZED  0x01u

    41 /** Flag is set, when error buffer contains new error information. */

    42 #define ASC_FLAG_HAS_ERROR  0x02u

    44 /** Flag is set, when SDL wants to quit the application. */

    45 #define ASC_FLAG_QUIT 0x80000000u

    47 /**

    48  * The global ascension context.

    49  */

    50 typedef struct AscContext {

    51     unsigned int flags;

    52     CxBuffer error_buffer;

    53     AscWindow windows[ASC_MAX_WINDOWS];

    54     AscWindow const *active_window;

    55     AscFont fonts[ASC_MAX_FONTS];

    56     unsigned int fonts_loaded;

    57     AscFont const *active_font;

    58     asc_col4i ink;

    59     unsigned int elapsed_millis;

    60     float elapsed;

    61 } AscContext;

    63 /** Global ascension context. */

    64 extern AscContext asc_context;

    66 void asc_context_initialize(void);

    67 void asc_context_destroy(void);

    70 /**

    71  * Dispatches events and synchronizes all initialized windows.

    72  *

    73  * @return false, if the application wants to quit, true otherwise

    74  */

    75 bool asc_loop_next(void);

    77 /**

    78  * Sets the active drawing color.

    79  */

    80 #define asc_ink(color) asc_context.ink = (color)

    81 #define asc_ink_rgba(r,g,b,a) asc_context.ink = (asc_col4i){(r),(g),(b),(a)}

    82 #define asc_ink_rgb(r,g,b) asc_context.ink = (asc_col4i){(r),(g),(b),255u}

    84 /**

    85  * Sets the active drawing font.

    86  */

    87 #define asc_set_font(font) asc_context.active_font = (font)

    89 #endif /* ASCENSION_CONTEXT_H */

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