「App:Library:LVGL:docs:3rd party libraries:PNG decoder」の版間の差分
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ナビゲーションに移動検索に移動| 1行目: | 1行目: | ||
https://docs.lvgl.io/8.2/libs/png.html | https://docs.lvgl.io/8.2/libs/png.html | ||
__NOTOC__ | __NOTOC__ | ||
| + | = PNG decoder = | ||
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Allow the use of PNG images in LVGL. This implementation uses lodepng library. | Allow the use of PNG images in LVGL. This implementation uses lodepng library. | ||
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As it might take significant time to decode PNG images LVGL's images caching feature can be useful. | As it might take significant time to decode PNG images LVGL's images caching feature can be useful. | ||
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== Example == | == Example == | ||
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=== Open a PNG image from file and variable === | === Open a PNG image from file and variable === | ||
| − | [[file:LVGL docs 3rdPartyLibs PNGdecoder 01.png|link=https://docs.lvgl.io/8.2/libs/png.html#open-a-png-image-from-file-and-variable]] | + | [[file:LVGL docs 3rdPartyLibs PNGdecoder 01.png|link=https://docs.lvgl.io/8.2/libs/png.html#open-a-png-image-from-file-and-variable]]| |
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== API == | == API == | ||
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Functions | Functions | ||
; <span id="_CPPv311lv_png_initv"></span><span id="_CPPv211lv_png_initv"></span><span id="lv_png_init__void"></span><span id="lv__png_8h_1adc5d316c551d60f37084dd40b1aaec18" class="target"></span>void lv_png_init(void)[https://docs.lvgl.io/8.2/libs/png.html#_CPPv411lv_png_initv] <span id="_CPPv311lv_png_initv"></span><span id="_CPPv211lv_png_initv"></span><span id="lv_png_init__void"></span><span id="lv__png_8h_1adc5d316c551d60f37084dd40b1aaec18" class="target"></span> | ; <span id="_CPPv311lv_png_initv"></span><span id="_CPPv211lv_png_initv"></span><span id="lv_png_init__void"></span><span id="lv__png_8h_1adc5d316c551d60f37084dd40b1aaec18" class="target"></span>void lv_png_init(void)[https://docs.lvgl.io/8.2/libs/png.html#_CPPv411lv_png_initv] <span id="_CPPv311lv_png_initv"></span><span id="_CPPv211lv_png_initv"></span><span id="lv_png_init__void"></span><span id="lv__png_8h_1adc5d316c551d60f37084dd40b1aaec18" class="target"></span> | ||
: Register the PNG d[https://docs.lvgl.io/8.2/libs/png.html#_CPPv411lv_png_initv]ecoder functions in LVGL | : Register the PNG d[https://docs.lvgl.io/8.2/libs/png.html#_CPPv411lv_png_initv]ecoder functions in LVGL | ||
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:[[App:Library:LVGL:docs:3rd party libraries|戻る : Previous]] | :[[App:Library:LVGL:docs:3rd party libraries|戻る : Previous]] | ||
2022年6月29日 (水) 15:32時点における版
https://docs.lvgl.io/8.2/libs/png.html
PNG decoder
| 英文 | 自動翻訳 |
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Allow the use of PNG images in LVGL. This implementation uses lodepng library. If enabled in Note that, a file system driver needs to registered to open images from files. Read more about it here or just enable one in The whole PNG image is decoded so during decoding RAM equals to As it might take significant time to decode PNG images LVGL's images caching feature can be useful. |
Example
| 英文 | 自動翻訳 |
|---|---|
Open a PNG image from file and variable
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API
| 英文 | 自動翻訳 |
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Functions |
