Mercurial > molko
view libmlk-ui/mlk/ui/label.c @ 504:52a305833381
ui: rework styles
author | David Demelier <markand@malikania.fr> |
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date | Wed, 01 Mar 2023 14:07:10 +0100 |
parents | 2af25db99273 |
children | 6100c643dba0 |
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/* * label.c -- GUI label * * Copyright (c) 2020-2023 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 <mlk/core/font.h> #include <mlk/core/panic.h> #include <mlk/core/texture.h> #include "label.h" #include "theme.h" #define STYLE_INVOKE(s, f, ...) \ do { \ if (s && s->f) \ s->f(s, __VA_ARGS__); \ else if (mlk_label_style.f) \ mlk_label_style.f(s ? s : &mlk_label_style, __VA_ARGS__); \ } while (0) static inline struct mlk_font * style_font(struct mlk_label_style *style) { if (style && style->text_font) return style->text_font; return mlk_theme.fonts[MLK_THEME_FONT_INTERFACE]; } static void draw(struct mlk_label_style *style, const struct mlk_label *label) { struct mlk_font *font; struct mlk_texture tex; int err; font = style_font(style); /* Shadow text, only if enabled. */ if (label->flags & MLK_LABEL_FLAGS_SHADOW) { if ((err = mlk_font_render(font, &tex, label->text, style->shadow_color)) < 0) mlk_panic(err); mlk_texture_draw(&tex, label->x + 1, label->y + 1); mlk_texture_finish(&tex); } /* Normal text. */ if ((err = mlk_font_render(font, &tex, label->text, style->text_color)) < 0) mlk_panic(err); mlk_texture_draw(&tex, label->x, label->y); mlk_texture_finish(&tex); } struct mlk_label_style mlk_label_style = { .shadow_color = 0x000000ff, .text_color = 0xffffffff, .draw = draw }; int mlk_label_ok(const struct mlk_label *label) { return label && label->text && strlen(label->text) > 0; } int mlk_label_query(const struct mlk_label *label, unsigned int *w, unsigned int *h) { assert(mlk_label_ok(label)); struct mlk_font *font; int err; font = style_font(label->style); if ((err = mlk_font_query(font, label->text, w, h)) < 0) return err; return err; } void mlk_label_draw(const struct mlk_label *label) { assert(mlk_label_ok(label)); STYLE_INVOKE(label->style, draw, label); } void mlk_label_finish(struct mlk_label *label) { assert(mlk_label_ok(label)); STYLE_INVOKE(label->style, finish, label); }