ascension: src/font.c@8297afa1c29c

     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 #include <assert.h>

    33 #include <cx/array_list.h>

    35 void asc_font(enum AscFontStyle style, int size) {

    36     asc_context.active_font.style = style;

    37     asc_context.active_font.size = size;

    38 }

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

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

    42     switch (style) {

    43         case ASC_FONT_REGULAR:

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

    45         case ASC_FONT_BOLD:

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

    47         case ASC_FONT_ITALIC:

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

    49         case ASC_FONT_BOLD_ITALIC:

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

    51     }

    52 }

    54 struct asc_font_cache_entry {

    55     AscFont font;

    56     TTF_Font *ttf;

    57 };

    59 static CxList *asc_font_cache;

    61 static void asc_font_unload(struct asc_font_cache_entry *entry) {

    62     TTF_CloseFont(entry->ttf);

    63     asc_dprintf("Closed font size %u, style %u", entry->font.size, entry->font.style);

    64 }

    66 void asc_font_cache_init(void) {

    67     assert(asc_font_cache == NULL);

    68     asc_font_cache = cxArrayListCreateSimple(

    69             sizeof(struct asc_font_cache_entry), 16

    70     );

    71     asc_font_cache->simple_destructor = (cx_destructor_func) asc_font_unload;

    72 }

    74 void asc_font_cache_destroy(void) {

    75     assert(asc_font_cache != NULL);

    76     cxListDestroy(asc_font_cache);

    77 }

    80 TTF_Font *asc_font_load(AscFont font) {

    81     CxIterator iter = cxListIterator(asc_font_cache);

    82     cx_foreach(struct asc_font_cache_entry*, cache, iter) {

    83         if (cache->font.style == font.style && cache->font.size == font.size) {

    84             return cache->ttf;

    85         }

    86     }

    88     struct asc_font_cache_entry entry;

    89     entry.font = font;

    90     entry.ttf = TTF_OpenFont(asc_font_filename(font.style), font.size);

    91     if (entry.ttf == NULL) {

    92         asc_error(TTF_GetError());

    93         return NULL;

    94     } else {

    95         cxListAdd(asc_font_cache, &entry);

    96         asc_dprintf("Loaded font size %d, style %d from disk", font.size, font.style);

    97         return entry.ttf;

    98     }

    99 }

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