Mercurial > molko
view src/libmlk-core/core/font.c @ 419:1b4e61bdb9ab
core: introduce err.h
author | David Demelier <markand@malikania.fr> |
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date | Wed, 12 Oct 2022 15:06:18 +0200 |
parents | 460c78706989 |
children | 63ebfa352ae1 |
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/* * font.c -- basic font management * * Copyright (c) 2020-2022 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. */ #include <assert.h> #include <string.h> #include <SDL_ttf.h> #include "color.h" #include "error.h" #include "font.h" #include "texture_p.h" #include "util.h" #include "vfs.h" #include "vfs_p.h" int font_open(struct font *font, const char *path, unsigned int size) { assert(font); assert(path); if (!(font->handle = TTF_OpenFont(path, size))) return errorf("%s", SDL_GetError()); return 0; } int font_openmem(struct font *font, const void *buffer, size_t buflen, unsigned int size) { assert(font); assert(buffer); SDL_RWops *ops; if (!(ops = SDL_RWFromConstMem(buffer, buflen)) || (!(font->handle = TTF_OpenFontRW(ops, 1, size)))) return errorf("%s", SDL_GetError()); return 0; } int font_openvfs(struct font *font, struct vfs_file *file, unsigned int size) { assert(font); assert(vfs_file_ok(file)); SDL_RWops *ops; if (!(ops = vfs_to_rw(file))) return -1; if (!(font->handle = TTF_OpenFontRW(ops, 1, size))) return errorf("%s", SDL_GetError()); return 0; } int font_ok(const struct font *font) { return font && font->handle; } int font_render(struct font *font, struct texture *tex, const char *text, unsigned long color) { assert(font_ok(font)); assert(text); SDL_Color fg = { .r = COLOR_R(color), .g = COLOR_G(color), .b = COLOR_B(color), .a = COLOR_A(color) }; SDL_Surface *surface; SDL_Surface *(*func)(TTF_Font *, const char *, SDL_Color); switch (font->style) { case FONT_STYLE_ANTIALIASED: func = TTF_RenderUTF8_Blended; break; default: func = TTF_RenderUTF8_Solid; break; } if (!(surface = func(font->handle, text, fg))) return errorf("%s", SDL_GetError()); return texture_from_surface(tex, surface); } unsigned int font_height(const struct font *font) { assert(font_ok(font)); return TTF_FontHeight(font->handle); } int font_query(const struct font *font, const char *text, unsigned int *w, unsigned int *h) { assert(font_ok(font)); assert(text); if (w) *w = 0; if (h) *h = 0; if (TTF_SizeUTF8(font->handle, text, (int *)w, (int *)h) != 0) return errorf("%s", SDL_GetError()); return 0; } void font_finish(struct font *font) { assert(font); if (font->handle) TTF_CloseFont(font->handle); memset(font, 0, sizeof (*font)); }