ascension: src/font.c@77493525eac2

     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 #include "ascension/ui/font.h"

    29 #include "ascension/context.h"

    30 #include "ascension/error.h"

    32 static char const *asc_font_filename(enum AscFontStyle style) {

    33     // TODO: do not assume we are running from the program dir

    34     switch (style) {

    35         case ASC_FONT_REGULAR:

    36             return "fonts/OpenSans-Regular.ttf";

    37         case ASC_FONT_BOLD:

    38             return "fonts/OpenSans-Bold.ttf";

    39         case ASC_FONT_ITALIC:

    40             return "fonts/OpenSans-Italic.ttf";

    41         case ASC_FONT_BOLD_ITALIC:

    42             return "fonts/OpenSans-BoldItalic.ttf";

    43     }

    44 }

    46 AscFont const *asc_font(enum AscFontStyle style, int size) {

    47     for (unsigned int i = 0 ; i < asc_context.fonts_loaded ; i++) {

    48         AscFont *font = &asc_context.fonts[i];

    49         if (font->size == size && font->style == style) {

    50             return font;

    51         }

    52     }

    54     if (asc_context.fonts_loaded == ASC_MAX_FONTS) {

    55         asc_dprintf("WARNING: Maximum number of fonts reached, wiping cache!");

    56         asc_font_cache_clear();

    57     }

    59     unsigned int slot = asc_context.fonts_loaded++;

    60     AscFont *font = &asc_context.fonts[slot];

    61     font->size = size;

    62     font->style = style;

    63     font->ptr = TTF_OpenFont(asc_font_filename(style), size);

    64     if (font->ptr == NULL) {

    65         asc_context.fonts_loaded--;

    66         asc_error(TTF_GetError());

    67         return NULL;

    68     }

    69     asc_dprintf("Loaded font size %u, style %u in slot %u", size, style, slot);

    70     return font;

    71 }

    73 void asc_font_cache_clear(void) {

    74     asc_dprintf("Fonts in cache that are being unloaded: %u", asc_context.fonts_loaded);

    75     while (asc_context.fonts_loaded > 0) {

    76         unsigned int i = --asc_context.fonts_loaded;

    77         AscFont *font = &asc_context.fonts[i];

    78         TTF_CloseFont(font->ptr);

    79         font->ptr = NULL;

    80     }

    81 }

    83 AscFont const *asc_font_cache_validate(AscFont const *font) {

    84     if (font->ptr) {

    85         return font;

    86     } else {

    87         asc_dprintf("Cache miss for font size %u, style %u", font->size, font->style);

    88         return asc_font(font->style, font->size);

    89     }

    90 }

Mercurial > hg > ascension / file revision