universe@11: /*
universe@11:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
universe@11:  * Copyright 2023 Mike Becker. All rights reserved.
universe@11:  *
universe@11:  * Redistribution and use in source and binary forms, with or without
universe@11:  * modification, are permitted provided that the following conditions are met:
universe@11:  *
universe@11:  *   1. Redistributions of source code must retain the above copyright
universe@11:  *      notice, this list of conditions and the following disclaimer.
universe@11:  *
universe@11:  *   2. Redistributions in binary form must reproduce the above copyright
universe@11:  *      notice, this list of conditions and the following disclaimer in the
universe@11:  *      documentation and/or other materials provided with the distribution.
universe@11:  *
universe@11:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
universe@11:  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
universe@11:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
universe@11:  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
universe@11:  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
universe@11:  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
universe@11:  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
universe@11:  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
universe@11:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
universe@11:  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
universe@11:  * POSSIBILITY OF SUCH DAMAGE.
universe@11:  */
universe@11: 
universe@48: #include "ascension/ui/font.h"
universe@11: #include "ascension/context.h"
universe@11: #include "ascension/error.h"
universe@11: 
universe@11: static char const *asc_font_filename(enum AscFontStyle style) {
universe@11:     // TODO: do not assume we are running from the program dir
universe@11:     switch (style) {
universe@11:         case ASC_FONT_REGULAR:
universe@11:             return "fonts/OpenSans-Regular.ttf";
universe@11:         case ASC_FONT_BOLD:
universe@11:             return "fonts/OpenSans-Bold.ttf";
universe@11:         case ASC_FONT_ITALIC:
universe@11:             return "fonts/OpenSans-Italic.ttf";
universe@11:         case ASC_FONT_BOLD_ITALIC:
universe@11:             return "fonts/OpenSans-BoldItalic.ttf";
universe@11:     }
universe@11: }
universe@11: 
universe@11: AscFont const *asc_font(enum AscFontStyle style, int size) {
universe@11:     for (unsigned int i = 0 ; i < asc_context.fonts_loaded ; i++) {
universe@11:         AscFont *font = &asc_context.fonts[i];
universe@11:         if (font->size == size && font->style == style) {
universe@11:             return font;
universe@11:         }
universe@11:     }
universe@11: 
universe@11:     if (asc_context.fonts_loaded == ASC_MAX_FONTS) {
universe@11:         asc_dprintf("WARNING: Maximum number of fonts reached, wiping cache!");
universe@11:         asc_font_cache_clear();
universe@11:     }
universe@11: 
universe@11:     unsigned int slot = asc_context.fonts_loaded++;
universe@11:     AscFont *font = &asc_context.fonts[slot];
universe@11:     font->size = size;
universe@11:     font->style = style;
universe@11:     font->ptr = TTF_OpenFont(asc_font_filename(style), size);
universe@11:     if (font->ptr == NULL) {
universe@11:         asc_context.fonts_loaded--;
universe@11:         asc_error(TTF_GetError());
universe@11:         return NULL;
universe@11:     }
universe@11:     asc_dprintf("Loaded font size %u, style %u in slot %u", size, style, slot);
universe@11:     return font;
universe@11: }
universe@11: 
universe@11: void asc_font_cache_clear(void) {
universe@11:     asc_dprintf("Fonts in cache that are being unloaded: %u", asc_context.fonts_loaded);
universe@11:     while (asc_context.fonts_loaded > 0) {
universe@11:         unsigned int i = --asc_context.fonts_loaded;
universe@11:         AscFont *font = &asc_context.fonts[i];
universe@11:         TTF_CloseFont(font->ptr);
universe@11:         font->ptr = NULL;
universe@11:     }
universe@11: }
universe@11: 
universe@11: AscFont const *asc_font_cache_validate(AscFont const *font) {
universe@11:     if (font->ptr) {
universe@11:         return font;
universe@11:     } else {
universe@11:         asc_dprintf("Cache miss for font size %u, style %u", font->size, font->style);
universe@11:         return asc_font(font->style, font->size);
universe@11:     }
universe@11: }