feat(freetype): add colored glyphs support (#6686)
Co-authored-by: Gabor Kiss-Vamosi <kisvegabor@gmail.com>
This commit is contained in:
Moritz Schneider
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examples/libs/freetype/NotoColorEmoji-32.subset.ttf
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examples/libs/freetype/NotoColorEmoji-32.subset.ttf
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examples/libs/freetype/OFL.txt
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examples/libs/freetype/OFL.txt
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Copyright 2021 Google Inc. All Rights Reserved.
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This Font Software is licensed under the SIL Open Font License, Version 1.1.
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This license is copied below, and is also available with a FAQ at:
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https://openfontlicense.org
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-----------------------------------------------------------
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SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
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-----------------------------------------------------------
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PREAMBLE
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The goals of the Open Font License (OFL) are to stimulate worldwide
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development of collaborative font projects, to support the font creation
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efforts of academic and linguistic communities, and to provide a free and
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open framework in which fonts may be shared and improved in partnership
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with others.
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The OFL allows the licensed fonts to be used, studied, modified and
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redistributed freely as long as they are not sold by themselves. The
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fonts, including any derivative works, can be bundled, embedded,
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names are not used by derivative works. The fonts and derivatives,
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however, cannot be released under any other type of license. The
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requirement for fonts to remain under this license does not apply
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to any document created using the fonts or their derivatives.
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DEFINITIONS
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"Font Software" refers to the set of files released by the Copyright
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Holder(s) under this license and clearly marked as such. This may
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Permission is hereby granted, free of charge, to any person obtaining
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1) Neither the Font Software nor any of its individual components,
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in Original or Modified Versions, may be sold by itself.
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redistributed and/or sold with any software, provided that each copy
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5) The Font Software, modified or unmodified, in part or in whole,
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distributed under any other license. The requirement for fonts to
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remain under this license does not apply to any document created
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using the Font Software.
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TERMINATION
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This license becomes null and void if any of the above conditions are
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DISCLAIMER
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THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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@@ -4,3 +4,8 @@ Open a front with FreeType
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.. lv_example:: libs/freetype/lv_example_freetype_1
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:language: c
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Use a bitmap font to draw Emojis using FreeType
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-----------------------------------------------
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.. lv_example:: libs/freetype/lv_example_freetype_2
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:language: c
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@@ -26,6 +26,7 @@ extern "C" {
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* GLOBAL PROTOTYPES
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**********************/
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void lv_example_freetype_1(void);
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void lv_example_freetype_2(void);
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/**********************
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* MACROS
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62
examples/libs/freetype/lv_example_freetype_2.c
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examples/libs/freetype/lv_example_freetype_2.c
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#include "../../lv_examples.h"
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#if LV_BUILD_EXAMPLES
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#if LV_USE_FREETYPE
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#if LV_FREETYPE_USE_LVGL_PORT
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#define PATH_PREFIX "A:"
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#else
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#define PATH_PREFIX "../"
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#endif
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/**
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* Load a font with FreeType
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*/
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void lv_example_freetype_2(void)
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{
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/*Create a font*/
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lv_font_t * font = lv_freetype_font_create(PATH_PREFIX "lvgl/examples/libs/freetype/Lato-Regular.ttf",
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LV_FREETYPE_FONT_RENDER_MODE_BITMAP,
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24,
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LV_FREETYPE_FONT_STYLE_NORMAL);
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/* this font is created from a downscaled NotoColorEmoji to 34x32px
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* Subset containing only a single emoji was created using fonttools:
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* Command: fonttools subset NotoColorEmoji.ttf --text=😀 */
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lv_font_t * font_emoji = lv_freetype_font_create(PATH_PREFIX "lvgl/examples/libs/freetype/NotoColorEmoji-32.subset.ttf",
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LV_FREETYPE_FONT_RENDER_MODE_BITMAP,
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24,
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LV_FREETYPE_FONT_STYLE_NORMAL);
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if(!font || !font_emoji) {
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LV_LOG_ERROR("freetype font create failed.");
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return;
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}
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font->fallback = font_emoji;
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/*Create style with the new font*/
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static lv_style_t style;
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lv_style_init(&style);
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lv_style_set_text_font(&style, font);
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lv_style_set_text_align(&style, LV_TEXT_ALIGN_CENTER);
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/*Create a label with the new style*/
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lv_obj_t * label = lv_label_create(lv_screen_active());
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lv_obj_add_style(label, &style, 0);
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lv_label_set_text(label, "Hello world\nI'm a font created with FreeType 😀");
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lv_obj_center(label);
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}
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#else
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void lv_example_freetype_2(void)
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{
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/*TODO
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*fallback for online examples*/
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lv_obj_t * label = lv_label_create(lv_screen_active());
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lv_label_set_text(label, "FreeType is not installed");
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lv_obj_center(label);
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}
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#endif
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#endif
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