From 2f591a4858a1cbdf8730c4fdfee73cf45dc99e9a Mon Sep 17 00:00:00 2001 From: Rafael Caricio Date: Mon, 21 Sep 2020 19:33:08 +0200 Subject: [PATCH] Example compiles to emscripten --- .gitignore | 1 + Cargo.lock | 926 ++++++++++++++++++++++++++++++++++++++++++++++ Cargo.toml | 17 + README.md | 11 + Web.toml | 17 + include/lv_conf.h | 701 +++++++++++++++++++++++++++++++++++ src/emscripten.rs | 32 ++ src/main.rs | 96 +++++ 8 files changed, 1801 insertions(+) create mode 100644 .gitignore create mode 100644 Cargo.lock create mode 100644 Cargo.toml create mode 100644 README.md create mode 100644 Web.toml create mode 100644 include/lv_conf.h create mode 100644 src/emscripten.rs create mode 100644 src/main.rs diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..ea8c4bf --- /dev/null +++ b/.gitignore @@ -0,0 +1 @@ +/target diff --git a/Cargo.lock b/Cargo.lock new file mode 100644 index 0000000..9acc221 --- /dev/null +++ b/Cargo.lock @@ -0,0 +1,926 @@ +# This file is 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b/README.md @@ -0,0 +1,11 @@ + + +## Setup + +Install Emscripten +https://puddleofcode.com/story/definitive-guide-to-rust-sdl2-and-emscriptem + +``` +$ embuilder.py build sdl2 +$ export EMMAKEN_CFLAGS="-s USE_SDL=2" +``` diff --git a/Web.toml b/Web.toml new file mode 100644 index 0000000..99ad7dd --- /dev/null +++ b/Web.toml @@ -0,0 +1,17 @@ +# The default value of `--target` used when building this crate +# in cases where it's not specified on the command line. +default-target = "wasm32-unknown-emscripten" + +[cargo-web] +# Asserts the minimum required version of `cargo-web` necessary +# to compile this crate; supported since 0.6.0. +minimum-version = "0.6.0" + +# These will only take effect on *-emscripten targets. +[target.emscripten] +# You can have a target-specific `prepend-js` key. +# `prepend-js = "src/emscripten_runtime.js"` + +# This will enable Emscripten's SDL2 port. Consult Emscripten's documentation +# for more details. +link-args = ["-s", "USE_SDL=2"] diff --git a/include/lv_conf.h b/include/lv_conf.h new file mode 100644 index 0000000..6fe446c --- /dev/null +++ b/include/lv_conf.h @@ -0,0 +1,701 @@ +/** + * @file lv_conf.h + * + */ + +/* + * COPY THIS FILE AS `lv_conf.h` NEXT TO the `lvgl` FOLDER + */ + +#if 1 /*Set it to "1" to enable content*/ + +#ifndef LV_CONF_H +#define LV_CONF_H +/* clang-format off */ + +#include + +/*==================== + Graphical settings + *====================*/ + +/* Maximal horizontal and vertical resolution to support by the library.*/ +#define LV_HOR_RES_MAX (240) +#define LV_VER_RES_MAX (240) + +/* Color depth: + * - 1: 1 byte per pixel + * - 8: RGB332 + * - 16: RGB565 + * - 32: ARGB8888 + */ +#define LV_COLOR_DEPTH 16 + +/* Swap the 2 bytes of RGB565 color. + * Useful if the display has a 8 bit interface (e.g. SPI)*/ +#define LV_COLOR_16_SWAP 0 + +/* 1: Enable screen transparency. + * Useful for OSD or other overlapping GUIs. + * Requires `LV_COLOR_DEPTH = 32` colors and the screen's style should be modified: `style.body.opa = ...`*/ +#define LV_COLOR_SCREEN_TRANSP 0 + +/*Images pixels with this color will not be drawn (with chroma keying)*/ +#define LV_COLOR_TRANSP LV_COLOR_LIME /*LV_COLOR_LIME: pure green*/ + +/* Enable anti-aliasing (lines, and radiuses will be smoothed) */ +#define LV_ANTIALIAS 1 + +/* Default display refresh period. + * Can be changed in the display driver (`lv_disp_drv_t`).*/ +#define LV_DISP_DEF_REFR_PERIOD 30 /*[ms]*/ + +/* Dot Per Inch: used to initialize default sizes. + * E.g. a button with width = LV_DPI / 2 -> half inch wide + * (Not so important, you can adjust it to modify default sizes and spaces)*/ +#define LV_DPI 130 /*[px]*/ + +/* The the real width of the display changes some default values: + * default object sizes, layout of examples, etc. + * According to the width of the display (hor. res. / dpi) + * the displays fall in 4 categories. + * The 4th is extra large which has no upper limit so not listed here + * The upper limit of the categories are set below in 0.1 inch unit. + */ +#define LV_DISP_SMALL_LIMIT 30 +#define LV_DISP_MEDIUM_LIMIT 50 +#define LV_DISP_LARGE_LIMIT 70 + +/* Type of coordinates. Should be `int16_t` (or `int32_t` for extreme cases) */ +typedef int16_t lv_coord_t; + +/*========================= + Memory manager settings + *=========================*/ + +/* LittelvGL's internal memory manager's settings. + * The graphical objects and other related data are stored here. */ + +/* 1: use custom malloc/free, 0: use the built-in `lv_mem_alloc` and `lv_mem_free` */ +#define LV_MEM_CUSTOM 0 +#if LV_MEM_CUSTOM == 0 +/* Size of the memory used by `lv_mem_alloc` in bytes (>= 2kB)*/ +# define LV_MEM_SIZE (32U * 1024U) + +/* Complier prefix for a big array declaration */ +# define LV_MEM_ATTR + +/* Set an address for the memory pool instead of allocating it as an array. + * Can be in external SRAM too. */ +# define LV_MEM_ADR 0 + +/* Automatically defrag. on free. Defrag. means joining the adjacent free cells. */ +# define LV_MEM_AUTO_DEFRAG 1 +#else /*LV_MEM_CUSTOM*/ +# define LV_MEM_CUSTOM_INCLUDE /*Header for the dynamic memory function*/ +# define LV_MEM_CUSTOM_ALLOC malloc /*Wrapper to malloc*/ +# define LV_MEM_CUSTOM_FREE free /*Wrapper to free*/ +#endif /*LV_MEM_CUSTOM*/ + +/* Garbage Collector settings + * Used if lvgl is binded to higher level language and the memory is managed by that language */ +#define LV_ENABLE_GC 0 +#if LV_ENABLE_GC != 0 +# define LV_GC_INCLUDE "gc.h" /*Include Garbage Collector related things*/ +# define LV_MEM_CUSTOM_REALLOC your_realloc /*Wrapper to realloc*/ +# define LV_MEM_CUSTOM_GET_SIZE your_mem_get_size /*Wrapper to lv_mem_get_size*/ +#endif /* LV_ENABLE_GC */ + +/*======================= + Input device settings + *=======================*/ + +/* Input device default settings. + * Can be changed in the Input device driver (`lv_indev_drv_t`)*/ + +/* Input device read period in milliseconds */ +#define LV_INDEV_DEF_READ_PERIOD 30 + +/* Drag threshold in pixels */ +#define LV_INDEV_DEF_DRAG_LIMIT 10 + +/* Drag throw slow-down in [%]. Greater value -> faster slow-down */ +#define LV_INDEV_DEF_DRAG_THROW 10 + +/* Long press time in milliseconds. + * Time to send `LV_EVENT_LONG_PRESSSED`) */ +#define LV_INDEV_DEF_LONG_PRESS_TIME 400 + +/* Repeated trigger period in long press [ms] + * Time between `LV_EVENT_LONG_PRESSED_REPEAT */ +#define LV_INDEV_DEF_LONG_PRESS_REP_TIME 100 + + +/* Gesture threshold in pixels */ +#define LV_INDEV_DEF_GESTURE_LIMIT 50 + +/* Gesture min velocity at release before swipe (pixels)*/ +#define LV_INDEV_DEF_GESTURE_MIN_VELOCITY 3 + +/*================== + * Feature usage + *==================*/ + +/*1: Enable the Animations */ +#define LV_USE_ANIMATION 1 +#if LV_USE_ANIMATION + +/*Declare the type of the user data of animations (can be e.g. `void *`, `int`, `struct`)*/ +typedef void * lv_anim_user_data_t; + +#endif + +/* 1: Enable shadow drawing*/ +#define LV_USE_SHADOW 1 +#if LV_USE_SHADOW +/* Allow buffering some shadow calculation + * LV_SHADOW_CACHE_SIZE is the max. shadow size to buffer, + * where shadow size is `shadow_width + radius` + * Caching has LV_SHADOW_CACHE_SIZE^2 RAM cost*/ +#define LV_SHADOW_CACHE_SIZE 0 +#endif + +/* 1: Use other blend modes than normal (`LV_BLEND_MODE_...`)*/ +#define LV_USE_BLEND_MODES 1 + +/* 1: Use the `opa_scale` style property to set the opacity of an object and its children at once*/ +#define LV_USE_OPA_SCALE 1 + +/* 1: Use image zoom and rotation*/ +#define LV_USE_IMG_TRANSFORM 1 + +/* 1: Enable object groups (for keyboard/encoder navigation) */ +#define LV_USE_GROUP 1 +#if LV_USE_GROUP +typedef void * lv_group_user_data_t; +#endif /*LV_USE_GROUP*/ + +/* 1: Enable GPU interface*/ +#define LV_USE_GPU 1 /*Only enables `gpu_fill_cb` and `gpu_blend_cb` in the disp. drv- */ +#define LV_USE_GPU_STM32_DMA2D 0 + +/* 1: Enable file system (might be required for images */ +#define LV_USE_FILESYSTEM 1 +#if LV_USE_FILESYSTEM +/*Declare the type of the user data of file system drivers (can be e.g. `void *`, `int`, `struct`)*/ +typedef void * lv_fs_drv_user_data_t; +#endif + +/*1: Add a `user_data` to drivers and objects*/ +#define LV_USE_USER_DATA 1 + +/*1: Show CPU usage and FPS count in the right bottom corner*/ +#define LV_USE_PERF_MONITOR 0 + +/*1: Use the functions and types from the older API if possible */ +#define LV_USE_API_EXTENSION_V6 1 + +/*======================== + * Image decoder and cache + *========================*/ + +/* 1: Enable indexed (palette) images */ +#define LV_IMG_CF_INDEXED 1 + +/* 1: Enable alpha indexed images */ +#define LV_IMG_CF_ALPHA 1 + +/* Default image cache size. Image caching keeps the images opened. + * If only the built-in image formats are used there is no real advantage of caching. + * (I.e. no new image decoder is added) + * With complex image decoders (e.g. PNG or JPG) caching can save the continuous open/decode of images. + * However the opened images might consume additional RAM. + * LV_IMG_CACHE_DEF_SIZE must be >= 1 */ +#define LV_IMG_CACHE_DEF_SIZE 1 + +/*Declare the type of the user data of image decoder (can be e.g. `void *`, `int`, `struct`)*/ +typedef void * lv_img_decoder_user_data_t; + +/*===================== + * Compiler settings + *====================*/ +/* Define a custom attribute to `lv_tick_inc` function */ +#define LV_ATTRIBUTE_TICK_INC + +/* Define a custom attribute to `lv_task_handler` function */ +#define LV_ATTRIBUTE_TASK_HANDLER + +/* Define a custom attribute to `lv_disp_flush_ready` function */ +#define LV_ATTRIBUTE_FLUSH_READY + +/* With size optimization (-Os) the compiler might not align data to + * 4 or 8 byte boundary. This alignment will be explicitly applied where needed. + * E.g. __attribute__((aligned(4))) */ +#define LV_ATTRIBUTE_MEM_ALIGN + +/* Attribute to mark large constant arrays for example + * font's bitmaps */ +#define LV_ATTRIBUTE_LARGE_CONST + +/* Prefix performance critical functions to place them into a faster memory (e.g RAM) + * Uses 15-20 kB extra memory */ +#define LV_ATTRIBUTE_FAST_MEM + +/* Export integer constant to binding. + * This macro is used with constants in the form of LV_ that + * should also appear on lvgl binding API such as Micropython + * + * The default value just prevents a GCC warning. + */ +#define LV_EXPORT_CONST_INT(int_value) struct _silence_gcc_warning + +/*=================== + * HAL settings + *==================*/ + +/* 1: use a custom tick source. + * It removes the need to manually update the tick with `lv_tick_inc`) */ +#define LV_TICK_CUSTOM 0 +#if LV_TICK_CUSTOM == 1 +#define LV_TICK_CUSTOM_INCLUDE "something.h" /*Header for the sys time function*/ +#define LV_TICK_CUSTOM_SYS_TIME_EXPR (millis()) /*Expression evaluating to current systime in ms*/ +#endif /*LV_TICK_CUSTOM*/ + +typedef void * lv_disp_drv_user_data_t; /*Type of user data in the display driver*/ +typedef void * lv_indev_drv_user_data_t; /*Type of user data in the input device driver*/ + +/*================ + * Log settings + *===============*/ + +/*1: Enable the log module*/ +#define LV_USE_LOG 0 +#if LV_USE_LOG +/* How important log should be added: + * LV_LOG_LEVEL_TRACE A lot of logs to give detailed information + * LV_LOG_LEVEL_INFO Log important events + * LV_LOG_LEVEL_WARN Log if something unwanted happened but didn't cause a problem + * LV_LOG_LEVEL_ERROR Only critical issue, when the system may fail + * LV_LOG_LEVEL_NONE Do not log anything + */ +# define LV_LOG_LEVEL LV_LOG_LEVEL_WARN + +/* 1: Print the log with 'printf'; + * 0: user need to register a callback with `lv_log_register_print_cb`*/ +# define LV_LOG_PRINTF 0 +#endif /*LV_USE_LOG*/ + +/*================= + * Debug settings + *================*/ + +/* If Debug is enabled LittelvGL validates the parameters of the functions. + * If an invalid parameter is found an error log message is printed and + * the MCU halts at the error. (`LV_USE_LOG` should be enabled) + * If you are debugging the MCU you can pause + * the debugger to see exactly where the issue is. + * + * The behavior of asserts can be overwritten by redefining them here. + * E.g. #define LV_ASSERT_MEM(p) + */ +#define LV_USE_DEBUG 1 +#if LV_USE_DEBUG + +/*Check if the parameter is NULL. (Quite fast) */ +#define LV_USE_ASSERT_NULL 1 + +/*Checks is the memory is successfully allocated or no. (Quite fast)*/ +#define LV_USE_ASSERT_MEM 1 + +/*Check the integrity of `lv_mem` after critical operations. (Slow)*/ +#define LV_USE_ASSERT_MEM_INTEGRITY 0 + +/* Check the strings. + * Search for NULL, very long strings, invalid characters, and unnatural repetitions. (Slow) + * If disabled `LV_USE_ASSERT_NULL` will be performed instead (if it's enabled) */ +#define LV_USE_ASSERT_STR 0 + +/* Check NULL, the object's type and existence (e.g. not deleted). (Quite slow) + * If disabled `LV_USE_ASSERT_NULL` will be performed instead (if it's enabled) */ +#define LV_USE_ASSERT_OBJ 0 + +/*Check if the styles are properly initialized. (Fast)*/ +#define LV_USE_ASSERT_STYLE 0 + +#endif /*LV_USE_DEBUG*/ + +/*================== + * FONT USAGE + *===================*/ + +/* The built-in fonts contains the ASCII range and some Symbols with 4 bit-per-pixel. + * The symbols are available via `LV_SYMBOL_...` defines + * More info about fonts: https://docs.lvgl.com/#Fonts + * To create a new font go to: https://lvgl.com/ttf-font-to-c-array + */ + +/* Montserrat fonts with bpp = 4 + * https://fonts.google.com/specimen/Montserrat */ +#define LV_FONT_MONTSERRAT_12 0 +#define LV_FONT_MONTSERRAT_14 0 +#define LV_FONT_MONTSERRAT_16 1 +#define LV_FONT_MONTSERRAT_18 0 +#define LV_FONT_MONTSERRAT_20 0 +#define LV_FONT_MONTSERRAT_22 0 +#define LV_FONT_MONTSERRAT_24 0 +#define LV_FONT_MONTSERRAT_26 0 +#define LV_FONT_MONTSERRAT_28 0 +#define LV_FONT_MONTSERRAT_30 0 +#define LV_FONT_MONTSERRAT_32 0 +#define LV_FONT_MONTSERRAT_34 0 +#define LV_FONT_MONTSERRAT_36 0 +#define LV_FONT_MONTSERRAT_38 0 +#define LV_FONT_MONTSERRAT_40 0 +#define LV_FONT_MONTSERRAT_42 0 +#define LV_FONT_MONTSERRAT_44 0 +#define LV_FONT_MONTSERRAT_46 0 +#define LV_FONT_MONTSERRAT_48 0 + +/* Demonstrate special features */ +#define LV_FONT_MONTSERRAT_12_SUBPX 0 +#define LV_FONT_MONTSERRAT_28_COMPRESSED 0 /*bpp = 3*/ +#define LV_FONT_DEJAVU_16_PERSIAN_HEBREW 0 /*Hebrew, Arabic, PErisan letters and all their forms*/ +#define LV_FONT_SIMSUN_16_CJK 0 /*1000 most common CJK radicals*/ + +/*Pixel perfect monospace font + * http://pelulamu.net/unscii/ */ +#define LV_FONT_UNSCII_8 0 + +/* Optionally declare your custom fonts here. + * You can use these fonts as default font too + * and they will be available globally. E.g. + * #define LV_FONT_CUSTOM_DECLARE LV_FONT_DECLARE(my_font_1) \ + * LV_FONT_DECLARE(my_font_2) + */ +#define LV_FONT_CUSTOM_DECLARE + +/* Enable it if you have fonts with a lot of characters. + * The limit depends on the font size, font face and bpp + * but with > 10,000 characters if you see issues probably you need to enable it.*/ +#define LV_FONT_FMT_TXT_LARGE 0 + +/* Set the pixel order of the display. + * Important only if "subpx fonts" are used. + * With "normal" font it doesn't matter. + */ +#define LV_FONT_SUBPX_BGR 0 + +/*Declare the type of the user data of fonts (can be e.g. `void *`, `int`, `struct`)*/ +typedef void * lv_font_user_data_t; + +/*================ + * THEME USAGE + *================*/ + +/*Always enable at least on theme*/ + +/* No theme, you can apply your styles as you need + * No flags. Set LV_THEME_DEFAULT_FLAG 0 */ + #define LV_USE_THEME_EMPTY 1 + +/*Simple to the create your theme based on it + * No flags. Set LV_THEME_DEFAULT_FLAG 0 */ + #define LV_USE_THEME_TEMPLATE 1 + +/* A fast and impressive theme. + * Flags: + * LV_THEME_MATERIAL_FLAG_LIGHT: light theme + * LV_THEME_MATERIAL_FLAG_DARK: dark theme*/ + #define LV_USE_THEME_MATERIAL 1 + +/* Mono-color theme for monochrome displays. + * If LV_THEME_DEFAULT_COLOR_PRIMARY is LV_COLOR_BLACK the + * texts and borders will be black and the background will be + * white. Else the colors are inverted. + * No flags. Set LV_THEME_DEFAULT_FLAG 0 */ + #define LV_USE_THEME_MONO 1 + +#define LV_THEME_DEFAULT_INCLUDE /*Include a header for the init. function*/ +#define LV_THEME_DEFAULT_INIT lv_theme_material_init +#define LV_THEME_DEFAULT_COLOR_PRIMARY LV_COLOR_RED +#define LV_THEME_DEFAULT_COLOR_SECONDARY LV_COLOR_BLUE +#define LV_THEME_DEFAULT_FLAG LV_THEME_MATERIAL_FLAG_LIGHT +#define LV_THEME_DEFAULT_FONT_SMALL &lv_font_montserrat_16 +#define LV_THEME_DEFAULT_FONT_NORMAL &lv_font_montserrat_16 +#define LV_THEME_DEFAULT_FONT_SUBTITLE &lv_font_montserrat_16 +#define LV_THEME_DEFAULT_FONT_TITLE &lv_font_montserrat_16 + +/*================= + * Text settings + *=================*/ + +/* Select a character encoding for strings. + * Your IDE or editor should have the same character encoding + * - LV_TXT_ENC_UTF8 + * - LV_TXT_ENC_ASCII + * */ +#define LV_TXT_ENC LV_TXT_ENC_UTF8 + + /*Can break (wrap) texts on these chars*/ +#define LV_TXT_BREAK_CHARS " ,.;:-_" + +/* If a word is at least this long, will break wherever "prettiest" + * To disable, set to a value <= 0 */ +#define LV_TXT_LINE_BREAK_LONG_LEN 0 + +/* Minimum number of characters in a long word to put on a line before a break. + * Depends on LV_TXT_LINE_BREAK_LONG_LEN. */ +#define LV_TXT_LINE_BREAK_LONG_PRE_MIN_LEN 3 + +/* Minimum number of characters in a long word to put on a line after a break. + * Depends on LV_TXT_LINE_BREAK_LONG_LEN. */ +#define LV_TXT_LINE_BREAK_LONG_POST_MIN_LEN 3 + +/* The control character to use for signalling text recoloring. */ +#define LV_TXT_COLOR_CMD "#" + +/* Support bidirectional texts. + * Allows mixing Left-to-Right and Right-to-Left texts. + * The direction will be processed according to the Unicode Bidirectioanl Algorithm: + * https://www.w3.org/International/articles/inline-bidi-markup/uba-basics*/ +#define LV_USE_BIDI 0 +#if LV_USE_BIDI +/* Set the default direction. Supported values: + * `LV_BIDI_DIR_LTR` Left-to-Right + * `LV_BIDI_DIR_RTL` Right-to-Left + * `LV_BIDI_DIR_AUTO` detect texts base direction */ +#define LV_BIDI_BASE_DIR_DEF LV_BIDI_DIR_AUTO +#endif + +/* Enable Arabic/Persian processing + * In these languages characters should be replaced with + * an other form based on their position in the text */ +#define LV_USE_ARABIC_PERSIAN_CHARS 0 + +/*Change the built in (v)snprintf functions*/ +#define LV_SPRINTF_CUSTOM 0 +#if LV_SPRINTF_CUSTOM +# define LV_SPRINTF_INCLUDE +# define lv_snprintf snprintf +# define lv_vsnprintf vsnprintf +#else /*!LV_SPRINTF_CUSTOM*/ +# define LV_SPRINTF_DISABLE_FLOAT 1 +#endif /*LV_SPRINTF_CUSTOM*/ + +/*=================== + * LV_OBJ SETTINGS + *==================*/ + +#if LV_USE_USER_DATA +/*Declare the type of the user data of object (can be e.g. `void *`, `int`, `struct`)*/ +typedef void * lv_obj_user_data_t; +/*Provide a function to free user data*/ +#define LV_USE_USER_DATA_FREE 0 +#if LV_USE_USER_DATA_FREE +# define LV_USER_DATA_FREE_INCLUDE "something.h" /*Header for user data free function*/ +/* Function prototype : void user_data_free(lv_obj_t * obj); */ +# define LV_USER_DATA_FREE (user_data_free) /*Invoking for user data free function*/ +#endif +#endif + +/*1: enable `lv_obj_realaign()` based on `lv_obj_align()` parameters*/ +#define LV_USE_OBJ_REALIGN 1 + +/* Enable to make the object clickable on a larger area. + * LV_EXT_CLICK_AREA_OFF or 0: Disable this feature + * LV_EXT_CLICK_AREA_TINY: The extra area can be adjusted horizontally and vertically (0..255 px) + * LV_EXT_CLICK_AREA_FULL: The extra area can be adjusted in all 4 directions (-32k..+32k px) + */ +#define LV_USE_EXT_CLICK_AREA LV_EXT_CLICK_AREA_TINY + +/*================== + * LV OBJ X USAGE + *================*/ +/* + * Documentation of the object types: https://docs.lvgl.com/#Object-types + */ + +/*Arc (dependencies: -)*/ +#define LV_USE_ARC 1 + +/*Bar (dependencies: -)*/ +#define LV_USE_BAR 1 + +/*Button (dependencies: lv_cont*/ +#define LV_USE_BTN 1 + +/*Button matrix (dependencies: -)*/ +#define LV_USE_BTNMATRIX 1 + +/*Calendar (dependencies: -)*/ +#define LV_USE_CALENDAR 1 + +/*Canvas (dependencies: lv_img)*/ +#define LV_USE_CANVAS 1 + +/*Check box (dependencies: lv_btn, lv_label)*/ +#define LV_USE_CHECKBOX 1 + +/*Chart (dependencies: -)*/ +#define LV_USE_CHART 1 +#if LV_USE_CHART +# define LV_CHART_AXIS_TICK_LABEL_MAX_LEN 256 +#endif + +/*Container (dependencies: -*/ +#define LV_USE_CONT 1 + +/*Color picker (dependencies: -*/ +#define LV_USE_CPICKER 1 + +/*Drop down list (dependencies: lv_page, lv_label, lv_symbol_def.h)*/ +#define LV_USE_DROPDOWN 1 +#if LV_USE_DROPDOWN != 0 +/*Open and close default animation time [ms] (0: no animation)*/ +# define LV_DROPDOWN_DEF_ANIM_TIME 200 +#endif + +/*Gauge (dependencies:lv_bar, lv_linemeter)*/ +#define LV_USE_GAUGE 1 + +/*Image (dependencies: lv_label*/ +#define LV_USE_IMG 1 + +/*Image Button (dependencies: lv_btn*/ +#define LV_USE_IMGBTN 1 +#if LV_USE_IMGBTN +/*1: The imgbtn requires left, mid and right parts and the width can be set freely*/ +# define LV_IMGBTN_TILED 0 +#endif + +/*Keyboard (dependencies: lv_btnm)*/ +#define LV_USE_KEYBOARD 1 + +/*Label (dependencies: -*/ +#define LV_USE_LABEL 1 +#if LV_USE_LABEL != 0 +/*Hor, or ver. scroll speed [px/sec] in 'LV_LABEL_LONG_ROLL/ROLL_CIRC' mode*/ +# define LV_LABEL_DEF_SCROLL_SPEED 25 + +/* Waiting period at beginning/end of animation cycle */ +# define LV_LABEL_WAIT_CHAR_COUNT 3 + +/*Enable selecting text of the label */ +# define LV_LABEL_TEXT_SEL 0 + +/*Store extra some info in labels (12 bytes) to speed up drawing of very long texts*/ +# define LV_LABEL_LONG_TXT_HINT 0 +#endif + +/*LED (dependencies: -)*/ +#define LV_USE_LED 1 +#if LV_USE_LED +# define LV_LED_BRIGHT_MIN 120 /*Minimal brightness*/ +# define LV_LED_BRIGHT_MAX 255 /*Maximal brightness*/ +#endif + +/*Line (dependencies: -*/ +#define LV_USE_LINE 1 + +/*List (dependencies: lv_page, lv_btn, lv_label, (lv_img optionally for icons ))*/ +#define LV_USE_LIST 1 +#if LV_USE_LIST != 0 +/*Default animation time of focusing to a list element [ms] (0: no animation) */ +# define LV_LIST_DEF_ANIM_TIME 100 +#endif + +/*Line meter (dependencies: *;)*/ +#define LV_USE_LINEMETER 1 +#if LV_USE_LINEMETER +/* Draw line more precisely at cost of performance. + * Useful if there are lot of lines any minor are visible + * 0: No extra precision + * 1: Some extra precision + * 2: Best precision + */ +# define LV_LINEMETER_PRECISE 0 +#endif + +/*Mask (dependencies: -)*/ +#define LV_USE_OBJMASK 1 + +/*Message box (dependencies: lv_rect, lv_btnm, lv_label)*/ +#define LV_USE_MSGBOX 1 + +/*Page (dependencies: lv_cont)*/ +#define LV_USE_PAGE 1 +#if LV_USE_PAGE != 0 +/*Focus default animation time [ms] (0: no animation)*/ +# define LV_PAGE_DEF_ANIM_TIME 400 +#endif + +/*Preload (dependencies: lv_arc, lv_anim)*/ +#define LV_USE_SPINNER 1 +#if LV_USE_SPINNER != 0 +# define LV_SPINNER_DEF_ARC_LENGTH 60 /*[deg]*/ +# define LV_SPINNER_DEF_SPIN_TIME 1000 /*[ms]*/ +# define LV_SPINNER_DEF_ANIM LV_SPINNER_TYPE_SPINNING_ARC +#endif + +/*Roller (dependencies: lv_ddlist)*/ +#define LV_USE_ROLLER 1 +#if LV_USE_ROLLER != 0 +/*Focus animation time [ms] (0: no animation)*/ +# define LV_ROLLER_DEF_ANIM_TIME 200 + +/*Number of extra "pages" when the roller is infinite*/ +# define LV_ROLLER_INF_PAGES 7 +#endif + +/*Slider (dependencies: lv_bar)*/ +#define LV_USE_SLIDER 1 + +/*Spinbox (dependencies: lv_ta)*/ +#define LV_USE_SPINBOX 1 + +/*Switch (dependencies: lv_slider)*/ +#define LV_USE_SWITCH 1 + +/*Text area (dependencies: lv_label, lv_page)*/ +#define LV_USE_TEXTAREA 1 +#if LV_USE_TEXTAREA != 0 +# define LV_TEXTAREA_DEF_CURSOR_BLINK_TIME 400 /*ms*/ +# define LV_TEXTAREA_DEF_PWD_SHOW_TIME 1500 /*ms*/ +#endif + +/*Table (dependencies: lv_label)*/ +#define LV_USE_TABLE 1 +#if LV_USE_TABLE +# define LV_TABLE_COL_MAX 12 +#endif + +/*Tab (dependencies: lv_page, lv_btnm)*/ +#define LV_USE_TABVIEW 1 +# if LV_USE_TABVIEW != 0 +/*Time of slide animation [ms] (0: no animation)*/ +# define LV_TABVIEW_DEF_ANIM_TIME 300 +#endif + +/*Tileview (dependencies: lv_page) */ +#define LV_USE_TILEVIEW 1 +#if LV_USE_TILEVIEW +/*Time of slide animation [ms] (0: no animation)*/ +# define LV_TILEVIEW_DEF_ANIM_TIME 300 +#endif + +/*Window (dependencies: lv_cont, lv_btn, lv_label, lv_img, lv_page)*/ +#define LV_USE_WIN 1 + +/*================== + * Non-user section + *==================*/ + +#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS) /* Disable warnings for Visual Studio*/ +# define _CRT_SECURE_NO_WARNINGS +#endif + +/*--END OF LV_CONF_H--*/ + +#endif /*LV_CONF_H*/ + +#endif /*End of "Content enable"*/ diff --git a/src/emscripten.rs b/src/emscripten.rs new file mode 100644 index 0000000..c10f3ac --- /dev/null +++ b/src/emscripten.rs @@ -0,0 +1,32 @@ +#[cfg(target_os = "emscripten")] +pub mod emscripten { + use std::cell::RefCell; + use std::ptr::null_mut; + use std::os::raw::{c_int, c_void, c_float}; + + #[allow(non_camel_case_types)] + type em_callback_func = unsafe extern fn(); + + extern { + pub fn emscripten_set_main_loop(func: em_callback_func, fps: c_int, simulate_infinite_loop: c_int); + pub fn emscripten_cancel_main_loop(); + pub fn emscripten_get_now() -> c_float; + } + + thread_local!(static MAIN_LOOP_CALLBACK: RefCell<*mut c_void> = RefCell::new(null_mut())); + + pub fn set_main_loop_callback(callback: F) where F: FnMut() { + MAIN_LOOP_CALLBACK.with(|log| { + *log.borrow_mut() = &callback as *const _ as *mut c_void; + }); + + unsafe { emscripten_set_main_loop(wrapper::, 0, 1); } + + unsafe extern "C" fn wrapper() where F: FnMut() { + MAIN_LOOP_CALLBACK.with(|z| { + let closure = *z.borrow_mut() as *mut F; + (*closure)(); + }); + } + } +} diff --git a/src/main.rs b/src/main.rs new file mode 100644 index 0000000..ee525e8 --- /dev/null +++ b/src/main.rs @@ -0,0 +1,96 @@ +use cstr_core::CString; +use embedded_graphics::pixelcolor::Rgb565; +use embedded_graphics::prelude::*; +use embedded_graphics_simulator::{ + OutputSettingsBuilder, SimulatorDisplay, SimulatorEvent, Window, +}; +use lvgl::style::Style; +use lvgl::widgets::{Bar, Label, LabelAlign}; +use lvgl::{self, Align, Animation, Color, Event, LvError, Part, State, Widget, UI}; +use std::time::Instant; +use std::process; + +#[cfg(target_os = "emscripten")] +pub mod emscripten; + +fn main() -> Result<(), LvError> { + let display: SimulatorDisplay = SimulatorDisplay::new(Size::new( + 240, + 240, + )); + + let output_settings = OutputSettingsBuilder::new().scale(2).build(); + let mut window = Window::new("Bar Example", &output_settings); + + let mut ui = UI::init()?; + + // Implement and register your display: + ui.disp_drv_register(display)?; + + // Create screen and widgets + let mut screen = ui.scr_act()?; + + let mut screen_style = Style::default(); + screen_style.set_bg_color(State::DEFAULT, Color::from_rgb((255, 255, 255))); + screen_style.set_radius(State::DEFAULT, 0); + screen.add_style(Part::Main, screen_style)?; + + // Create the bar object + let mut bar = Bar::new(&mut screen)?; + bar.set_size(175, 20)?; + bar.set_align(&mut screen, Align::Center, 0, 10)?; + bar.set_range(0, 100)?; + bar.on_event(|_b, _e| { + println!("Completed!"); + })?; + + // // Set the indicator style for the bar object + let mut ind_style = Style::default(); + ind_style.set_bg_color(State::DEFAULT, Color::from_rgb((100, 245, 100))); + bar.add_style(Part::All, ind_style)?; + + let mut loading_lbl = Label::new(&mut screen)?; + loading_lbl.set_text(CString::new("Loading...").unwrap().as_c_str())?; + loading_lbl.set_align(&mut bar, Align::OutTopMid, 0, -10)?; + loading_lbl.set_label_align(LabelAlign::Center)?; + + let mut loading_style = Style::default(); + loading_style.set_text_color(State::DEFAULT, Color::from_rgb((0, 0, 0))); + loading_lbl.add_style(Part::Main, loading_style)?; + + let mut i = 0; + let mut loop_started = Instant::now(); + let mut main_loop = || { + if i > 100 { + i = 0; + ui.event_send(&mut bar, Event::Clicked).unwrap(); + } + bar.set_value(i, Animation::ON).unwrap(); + i += 1; + + ui.task_handler(); + window.update(ui.get_display_ref().unwrap()); + + for event in window.events() { + match event { + SimulatorEvent::Quit => process::exit(1), + _ => {} + } + } + + ui.tick_inc(loop_started.elapsed()); + loop_started = Instant::now(); + }; + + #[cfg(target_os = "emscripten")] + use emscripten::{emscripten}; + + #[cfg(target_os = "emscripten")] + emscripten::set_main_loop_callback(main_loop); + + #[cfg(not(target_os = "emscripten"))] + loop { main_loop(); } + + Ok(()) +} +