lvgl-demo-fb: generalize for any backend and add improvements
Rename the recipe to lvgl-demo to reflect the generalization and select the
most appropriate backend for each platform. Aside from making sure each backend
builds and runs fine, add some usability improvements:
* Specify the mouse as the default evdev device instead of the touchscreen
* Use common resolution variables to be able to configure the app's
dimensions easily
https://onedigi.atlassian.net/browse/DEL-8740
Signed-off-by: Gabriel Valcazar <gabriel.valcazar@digi.com>
This commit is contained in:
Gabriel Valcazar
parent
33a93ccae4
commit
c0789c416b
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@ -7,15 +7,15 @@ LVGL_CONFIG_USE_DRM = "${@bb.utils.contains('PACKAGECONFIG', 'drm', '1', '0', d)
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LVGL_CONFIG_DRM_CARD ?= "/dev/dri/card0"
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LVGL_CONFIG_DRM_CARD ?= "/dev/dri/card0"
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LVGL_CONFIG_USE_EVDEV = "${@bb.utils.contains_any('PACKAGECONFIG', 'drm fbdev', '1', '0', d)}"
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LVGL_CONFIG_USE_EVDEV = "${@bb.utils.contains_any('PACKAGECONFIG', 'drm fbdev', '1', '0', d)}"
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LVGL_CONFIG_EVDEV_INPUT ?= "/dev/input/touchscreen"
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LVGL_CONFIG_EVDEV_INPUT ?= "/dev/input/mouse0"
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LVGL_CONFIG_USE_FBDEV = "${@bb.utils.contains('PACKAGECONFIG', 'fbdev', '1', '0', d)}"
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LVGL_CONFIG_USE_FBDEV = "${@bb.utils.contains('PACKAGECONFIG', 'fbdev', '1', '0', d)}"
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LVGL_CONFIG_USE_SDL = "${@bb.utils.contains('PACKAGECONFIG', 'sdl', '1', '0', d)}"
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LVGL_CONFIG_USE_SDL = "${@bb.utils.contains('PACKAGECONFIG', 'sdl', '1', '0', d)}"
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LVGL_CONFIG_USE_WAYLAND = "${@bb.utils.contains('PACKAGECONFIG', 'wayland', '1', '0', d)}"
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LVGL_CONFIG_USE_WAYLAND = "${@bb.utils.contains('PACKAGECONFIG', 'wayland', '1', '0', d)}"
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LVGL_CONFIG_WAYLAND_HOR_RES ?= "480"
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LVGL_CONFIG_HOR_RES ?= "800"
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LVGL_CONFIG_WAYLAND_VER_RES ?= "320"
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LVGL_CONFIG_VER_RES ?= "480"
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ALLOW_EMPTY:${PN} = "1"
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ALLOW_EMPTY:${PN} = "1"
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@ -37,12 +37,10 @@ do_configure:append() {
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-e "s|\(^# define USE_FBDEV \).*|# define USE_FBDEV ${LVGL_CONFIG_USE_FBDEV}|g" \
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-e "s|\(^# define USE_FBDEV \).*|# define USE_FBDEV ${LVGL_CONFIG_USE_FBDEV}|g" \
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\
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\
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-e "s|\(^# define USE_SDL \).*|# define USE_SDL ${LVGL_CONFIG_USE_SDL}|g" \
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-e "s|\(^# define USE_SDL \).*|# define USE_SDL ${LVGL_CONFIG_USE_SDL}|g" \
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-e "s|\(^# define USE_SDL_GPU \).*|# define USE_SDL_GPU 1|g" \
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-e "s|\(^# define SDL_DOUBLE_BUFFERED \).*|# define SDL_DOUBLE_BUFFERED 1|g" \
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\
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\
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-e "s|\(^# define USE_WAYLAND \).*|# define USE_WAYLAND ${LVGL_CONFIG_USE_WAYLAND}|g" \
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-e "s|\(^# define USE_WAYLAND \).*|# define USE_WAYLAND ${LVGL_CONFIG_USE_WAYLAND}|g" \
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-e "s|\(^ *# *define *WAYLAND_HOR_RES *\).*|\1${LVGL_CONFIG_WAYLAND_HOR_RES}|g" \
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-e "s|\(^#define *LV_DRV_DISP_HOR_RES *\).*|\1${LVGL_CONFIG_HOR_RES}|g" \
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-e "s|\(^ *# *define *WAYLAND_VER_RES *\).*|\1${LVGL_CONFIG_WAYLAND_VER_RES}|g" \
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-e "s|\(^#define *LV_DRV_DISP_VER_RES *\).*|\1${LVGL_CONFIG_VER_RES}|g" \
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\
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\
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-i "${S}/lv_drv_conf.h"
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-i "${S}/lv_drv_conf.h"
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}
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}
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@ -1,46 +0,0 @@
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SUMMARY = "LVGL Demo Application for Framebuffer"
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HOMEPAGE = "https://github.com/lvgl/lv_port_linux_frame_buffer"
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LICENSE = "MIT"
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LIC_FILES_CHKSUM = "file://LICENSE;md5=802d3d83ae80ef5f343050bf96cce3a4 \
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file://lv_drivers/LICENSE;md5=d6fc0df890c5270ef045981b516bb8f2 \
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file://lvgl/LICENCE.txt;md5=bf1198c89ae87f043108cea62460b03a"
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SRC_URI = "gitsm://github.com/lvgl/lv_port_linux_frame_buffer.git;branch=master;protocol=https"
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SRCREV = "adf2c4490e17a1b9ec1902cc412a24b3b8235c8e"
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EXTRA_OEMAKE = "DESTDIR=${D}"
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PACKAGECONFIG ??= "drm"
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require lv-drivers.inc
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inherit cmake
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S = "${WORKDIR}/git"
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TARGET_CFLAGS += "-I${STAGING_INCDIR}/libdrm"
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do_configure:prepend() {
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if [ "${LVGL_CONFIG_USE_DRM}" -eq 1 ] ; then
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# Add libdrm build dependency
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sed -i '/^target_link_libraries/ s@lvgl::drivers@& drm@' "${S}/CMakeLists.txt"
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# Switch from fbdev to drm usage
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sed -i 's@fbdev@drm@g' "${S}/main.c"
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# Pull resolution from DRM instead of hardcoding it
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sed -i '/disp_drv.hor_res/ d' "${S}/main.c"
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sed -i '/disp_drv.ver_res/ s@disp_drv.ver_res.*@drm_get_sizes(\&disp_drv.hor_res, \&disp_drv.ver_res, NULL);@' "${S}/main.c"
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fi
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if [ "${LVGL_CONFIG_USE_SDL}" -eq 1 ] ; then
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# Add libsdl build dependency
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sed -i '/^target_link_libraries/ s@lvgl::drivers@& SDL2@' "${S}/CMakeLists.txt"
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# Switch from fbdev to sdl usage
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sed -i 's@fbdev_flush@sdl_display_flush@g' "${S}/main.c"
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sed -i 's@lv_drivers/display/fbdev.h@lv_drivers/sdl/sdl.h@g' "${S}/main.c"
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sed -i 's@fbdev@sdl@g' "${S}/main.c"
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fi
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}
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do_install:append() {
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install -d ${D}${bindir}
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install -m 0755 ${B}/lvgl_fb ${D}${bindir}/
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}
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@ -0,0 +1,204 @@
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From: Gabriel Valcazar <gabriel.valcazar@digi.com>
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Date: Mon, 6 Nov 2023 13:45:27 +0100
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Subject: [PATCH] Make demo compatible with any backend
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Apply changes so the demo builds and runs with any of the 4 major backends
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(wayland, sdl, drm and fbdev)
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Signed-off-by: Gabriel Valcazar <gabriel.valcazar@digi.com>
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---
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main.c | 142 +++++++++++++++++++++++++++++++++++++++++++++++++++------
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1 file changed, 128 insertions(+), 14 deletions(-)
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diff --git a/main.c b/main.c
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index 33cd734..bb0248a 100644
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--- a/main.c
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+++ b/main.c
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@@ -1,12 +1,23 @@
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#include "lvgl/lvgl.h"
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#include "lvgl/demos/lv_demos.h"
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#include "lv_drivers/display/fbdev.h"
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+#include "lv_drivers/display/drm.h"
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#include "lv_drivers/indev/evdev.h"
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+#include "lv_drivers/sdl/sdl.h"
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+#include "lv_drivers/wayland/wayland.h"
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+
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+#if USE_SDL
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+#define SDL_MAIN_HANDLED /*To fix SDL's "undefined reference to WinMain" issue*/
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+#include <SDL2/SDL.h>
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+#endif
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+
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#include <unistd.h>
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#include <pthread.h>
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#include <time.h>
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#include <sys/time.h>
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+static void backend_init(void);
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+
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#define DISP_BUF_SIZE (128 * 1024)
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int main(void)
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@@ -14,8 +25,78 @@ int main(void)
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/*LittlevGL init*/
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lv_init();
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- /*Linux frame buffer device init*/
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- fbdev_init();
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+ backend_init();
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+
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+ /*Create a Demo*/
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+ lv_demo_widgets();
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+
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+ /*Handle LitlevGL tasks (tickless mode)*/
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+ while(1) {
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+ lv_timer_handler();
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+ usleep(5000);
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+ }
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+
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+ return 0;
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+}
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+
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+static void backend_init(void)
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+{
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+#if USE_WAYLAND
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+ lv_wayland_init();
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+
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+ /* Create a display */
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+ lv_disp_t * disp = lv_wayland_create_window(800, 480, "lvgl wayland demo", NULL /*close_cb*/);
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+#elif USE_SDL
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+ sdl_init();
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+
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+ /*A small buffer for LittlevGL to draw the screen's content*/
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+ static lv_color_t buf[SDL_HOR_RES * 100];
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+
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+ /*Initialize a descriptor for the buffer*/
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+ static lv_disp_draw_buf_t disp_buf;
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+ lv_disp_draw_buf_init(&disp_buf, buf, NULL, SDL_HOR_RES * 100);
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+
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+ /*Initialize and register a display driver*/
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+ static lv_disp_drv_t disp_drv;
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+ lv_disp_drv_init(&disp_drv);
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+ disp_drv.draw_buf = &disp_buf;
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+ disp_drv.flush_cb = sdl_display_flush;
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+ disp_drv.hor_res = SDL_HOR_RES;
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+ disp_drv.ver_res = SDL_VER_RES;
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+ lv_disp_drv_register(&disp_drv);
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+
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+ lv_group_t * g = lv_group_create();
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+ lv_group_set_default(g);
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+
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+ static lv_indev_drv_t indev_drv_1;
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+ lv_indev_drv_init(&indev_drv_1); /*Basic initialization*/
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+ indev_drv_1.type = LV_INDEV_TYPE_POINTER;
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+
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+ /*This function will be called periodically (by the library) to get the mouse position and state*/
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+ indev_drv_1.read_cb = sdl_mouse_read;
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+ lv_indev_t *mouse_indev = lv_indev_drv_register(&indev_drv_1);
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+
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+ /*Set a cursor for the mouse*/
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+ LV_IMG_DECLARE(mouse_cursor_icon)
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+ lv_obj_t * cursor_obj = lv_img_create(lv_scr_act()); /*Create an image object for the cursor */
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+ lv_img_set_src(cursor_obj, &mouse_cursor_icon); /*Set the image source*/
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+ lv_indev_set_cursor(mouse_indev, cursor_obj); /*Connect the image object to the driver*/
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+
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+ static lv_indev_drv_t indev_drv_2;
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+ lv_indev_drv_init(&indev_drv_2); /*Basic initialization*/
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+ indev_drv_2.type = LV_INDEV_TYPE_KEYPAD;
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+ indev_drv_2.read_cb = sdl_keyboard_read;
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+ lv_indev_t *kb_indev = lv_indev_drv_register(&indev_drv_2);
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+ lv_indev_set_group(kb_indev, g);
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+
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+ static lv_indev_drv_t indev_drv_3;
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+ lv_indev_drv_init(&indev_drv_3); /*Basic initialization*/
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+ indev_drv_3.type = LV_INDEV_TYPE_ENCODER;
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+ indev_drv_3.read_cb = sdl_mousewheel_read;
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+ lv_indev_t * enc_indev = lv_indev_drv_register(&indev_drv_3);
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+ lv_indev_set_group(enc_indev, g);
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+#elif USE_DRM
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+ drm_init();
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/*A small buffer for LittlevGL to draw the screen's content*/
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static lv_color_t buf[DISP_BUF_SIZE];
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@@ -28,12 +109,20 @@ int main(void)
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static lv_disp_drv_t disp_drv;
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lv_disp_drv_init(&disp_drv);
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disp_drv.draw_buf = &disp_buf;
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- disp_drv.flush_cb = fbdev_flush;
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- disp_drv.hor_res = 800;
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- disp_drv.ver_res = 480;
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+ disp_drv.flush_cb = drm_flush;
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+ lv_coord_t drm_width, drm_height;
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+ /* get size from DRM/KMS backend */
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+ uint32_t drm_dpi;
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+ drm_get_sizes(&drm_width, &drm_height, &drm_dpi);
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+ disp_drv.hor_res = drm_width;
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+ disp_drv.ver_res = drm_height;
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lv_disp_drv_register(&disp_drv);
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evdev_init();
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+
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+ lv_group_t * g = lv_group_create();
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+ lv_group_set_default(g);
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+
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static lv_indev_drv_t indev_drv_1;
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lv_indev_drv_init(&indev_drv_1); /*Basic initialization*/
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indev_drv_1.type = LV_INDEV_TYPE_POINTER;
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@@ -42,24 +131,49 @@ int main(void)
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indev_drv_1.read_cb = evdev_read;
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lv_indev_t *mouse_indev = lv_indev_drv_register(&indev_drv_1);
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-
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/*Set a cursor for the mouse*/
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LV_IMG_DECLARE(mouse_cursor_icon)
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lv_obj_t * cursor_obj = lv_img_create(lv_scr_act()); /*Create an image object for the cursor */
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lv_img_set_src(cursor_obj, &mouse_cursor_icon); /*Set the image source*/
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lv_indev_set_cursor(mouse_indev, cursor_obj); /*Connect the image object to the driver*/
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+#elif USE_FBDEV
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+ fbdev_init();
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+ /*A small buffer for LittlevGL to draw the screen's content*/
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+ static lv_color_t buf[DISP_BUF_SIZE];
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- /*Create a Demo*/
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- lv_demo_widgets();
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+ /*Initialize a descriptor for the buffer*/
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+ static lv_disp_draw_buf_t disp_buf;
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+ lv_disp_draw_buf_init(&disp_buf, buf, NULL, DISP_BUF_SIZE);
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- /*Handle LitlevGL tasks (tickless mode)*/
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- while(1) {
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- lv_timer_handler();
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- usleep(5000);
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- }
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+ /*Initialize and register a display driver*/
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+ static lv_disp_drv_t disp_drv;
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+ lv_disp_drv_init(&disp_drv);
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+ disp_drv.draw_buf = &disp_buf;
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+ disp_drv.flush_cb = fbdev_flush;
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+ disp_drv.hor_res = 800;
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+ disp_drv.ver_res = 480;
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+ lv_disp_drv_register(&disp_drv);
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- return 0;
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+ evdev_init();
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+
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+ lv_group_t * g = lv_group_create();
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+ lv_group_set_default(g);
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+
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+ static lv_indev_drv_t indev_drv_1;
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+ lv_indev_drv_init(&indev_drv_1); /*Basic initialization*/
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+ indev_drv_1.type = LV_INDEV_TYPE_POINTER;
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+
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+ /*This function will be called periodically (by the library) to get the mouse position and state*/
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+ indev_drv_1.read_cb = evdev_read;
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+ lv_indev_t *mouse_indev = lv_indev_drv_register(&indev_drv_1);
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+
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+ /*Set a cursor for the mouse*/
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+ LV_IMG_DECLARE(mouse_cursor_icon)
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+ lv_obj_t * cursor_obj = lv_img_create(lv_scr_act()); /*Create an image object for the cursor */
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+ lv_img_set_src(cursor_obj, &mouse_cursor_icon); /*Set the image source*/
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+ lv_indev_set_cursor(mouse_indev, cursor_obj); /*Connect the image object to the driver*/
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+#endif
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}
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/*Set in lv_conf.h as `LV_TICK_CUSTOM_SYS_TIME_EXPR`*/
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@ -0,0 +1,87 @@
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From: Gabriel Valcazar <gabriel.valcazar@digi.com>
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Date: Wed, 8 Nov 2023 13:25:25 +0100
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Subject: [PATCH] Miscellaneous improvements:
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* Change LV_COLOR_DEPTH from 32 to 16 to fix output on fbdev backend
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* Increase DISP_BUF_SIZE to 8 MiB to improve performance on fbdev and drm
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backends
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* Create common macros for app dimensions
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Signed-off-by: Gabriel Valcazar <gabriel.valcazar@digi.com>
|
||||||
|
---
|
||||||
|
lv_conf.h | 2 +-
|
||||||
|
lv_drv_conf.h | 6 ++++--
|
||||||
|
main.c | 9 +++++----
|
||||||
|
3 files changed, 10 insertions(+), 7 deletions(-)
|
||||||
|
|
||||||
|
diff --git a/lv_conf.h b/lv_conf.h
|
||||||
|
index 3137b1a..3f36997 100644
|
||||||
|
--- a/lv_conf.h
|
||||||
|
+++ b/lv_conf.h
|
||||||
|
@@ -30,7 +30,7 @@ extern uint32_t custom_tick_get(void);
|
||||||
|
*====================*/
|
||||||
|
|
||||||
|
/*Color depth: 1 (1 byte per pixel), 8 (RGB332), 16 (RGB565), 32 (ARGB8888)*/
|
||||||
|
-#define LV_COLOR_DEPTH 32
|
||||||
|
+#define LV_COLOR_DEPTH 16
|
||||||
|
|
||||||
|
/*Swap the 2 bytes of RGB565 color. Useful if the display has an 8-bit interface (e.g. SPI)*/
|
||||||
|
#define LV_COLOR_16_SWAP 0
|
||||||
|
diff --git a/lv_drv_conf.h b/lv_drv_conf.h
|
||||||
|
index d40e703..554eba9 100644
|
||||||
|
--- a/lv_drv_conf.h
|
||||||
|
+++ b/lv_drv_conf.h
|
||||||
|
@@ -32,6 +32,8 @@
|
||||||
|
#define LV_DRV_DISP_INCLUDE <stdint.h> /*Dummy include by default*/
|
||||||
|
#define LV_DRV_DISP_CMD_DATA(val) /*pin_x_set(val)*/ /*Set the command/data pin to 'val'*/
|
||||||
|
#define LV_DRV_DISP_RST(val) /*pin_x_set(val)*/ /*Set the reset pin to 'val'*/
|
||||||
|
+#define LV_DRV_DISP_HOR_RES 800
|
||||||
|
+#define LV_DRV_DISP_VER_RES 480
|
||||||
|
|
||||||
|
/*---------
|
||||||
|
* SPI
|
||||||
|
@@ -95,8 +97,8 @@
|
||||||
|
#endif
|
||||||
|
|
||||||
|
#if USE_SDL || USE_SDL_GPU
|
||||||
|
-# define SDL_HOR_RES 480
|
||||||
|
-# define SDL_VER_RES 320
|
||||||
|
+# define SDL_HOR_RES LV_DRV_DISP_HOR_RES
|
||||||
|
+# define SDL_VER_RES LV_DRV_DISP_VER_RES
|
||||||
|
|
||||||
|
/* Scale window by this factor (useful when simulating small screens) */
|
||||||
|
# define SDL_ZOOM 1
|
||||||
|
diff --git a/main.c b/main.c
|
||||||
|
index bb0248a..f3fb69e 100644
|
||||||
|
--- a/main.c
|
||||||
|
+++ b/main.c
|
||||||
|
@@ -18,7 +18,8 @@
|
||||||
|
|
||||||
|
static void backend_init(void);
|
||||||
|
|
||||||
|
-#define DISP_BUF_SIZE (128 * 1024)
|
||||||
|
+/* Originally 128 KiB, increase to 8 MiB to improve performance */
|
||||||
|
+#define DISP_BUF_SIZE (8 * 1024 * 1024)
|
||||||
|
|
||||||
|
int main(void)
|
||||||
|
{
|
||||||
|
@@ -45,7 +46,7 @@ static void backend_init(void)
|
||||||
|
lv_wayland_init();
|
||||||
|
|
||||||
|
/* Create a display */
|
||||||
|
- lv_disp_t * disp = lv_wayland_create_window(800, 480, "lvgl wayland demo", NULL /*close_cb*/);
|
||||||
|
+ lv_disp_t * disp = lv_wayland_create_window(LV_DRV_DISP_HOR_RES, LV_DRV_DISP_VER_RES, "lvgl wayland demo", NULL /*close_cb*/);
|
||||||
|
#elif USE_SDL
|
||||||
|
sdl_init();
|
||||||
|
|
||||||
|
@@ -151,8 +152,8 @@ static void backend_init(void)
|
||||||
|
lv_disp_drv_init(&disp_drv);
|
||||||
|
disp_drv.draw_buf = &disp_buf;
|
||||||
|
disp_drv.flush_cb = fbdev_flush;
|
||||||
|
- disp_drv.hor_res = 800;
|
||||||
|
- disp_drv.ver_res = 480;
|
||||||
|
+ disp_drv.hor_res = LV_DRV_DISP_HOR_RES;
|
||||||
|
+ disp_drv.ver_res = LV_DRV_DISP_VER_RES;
|
||||||
|
lv_disp_drv_register(&disp_drv);
|
||||||
|
|
||||||
|
evdev_init();
|
||||||
|
|
@ -0,0 +1,57 @@
|
||||||
|
SUMMARY = "LVGL Demo Application"
|
||||||
|
HOMEPAGE = "https://github.com/lvgl/lv_port_linux_frame_buffer"
|
||||||
|
LICENSE = "MIT"
|
||||||
|
LIC_FILES_CHKSUM = "file://LICENSE;md5=802d3d83ae80ef5f343050bf96cce3a4 \
|
||||||
|
file://lv_drivers/LICENSE;md5=d6fc0df890c5270ef045981b516bb8f2 \
|
||||||
|
file://lvgl/LICENCE.txt;md5=bf1198c89ae87f043108cea62460b03a"
|
||||||
|
|
||||||
|
SRC_URI = " \
|
||||||
|
gitsm://github.com/lvgl/lv_port_linux_frame_buffer.git;branch=master;protocol=https \
|
||||||
|
file://0001-Make-demo-compatible-with-any-backend.patch \
|
||||||
|
file://0002-Miscellaneous-improvements.patch \
|
||||||
|
"
|
||||||
|
SRCREV = "adf2c4490e17a1b9ec1902cc412a24b3b8235c8e"
|
||||||
|
|
||||||
|
EXTRA_OEMAKE = "DESTDIR=${D}"
|
||||||
|
|
||||||
|
# By default, use wayland backend if possible.
|
||||||
|
# If unavailable, fall back to a secondary backend
|
||||||
|
MINIMAL_BACKEND ?= "fbdev"
|
||||||
|
MINIMAL_BACKEND:imxdrm = "drm"
|
||||||
|
MINIMAL_BACKEND:ccmp15 = "sdl"
|
||||||
|
PACKAGECONFIG = "${@bb.utils.contains('DISTRO_FEATURES', 'wayland', 'wayland', '${MINIMAL_BACKEND}', d)}"
|
||||||
|
|
||||||
|
require lv-drivers.inc
|
||||||
|
|
||||||
|
inherit cmake
|
||||||
|
|
||||||
|
S = "${WORKDIR}/git"
|
||||||
|
|
||||||
|
TARGET_CFLAGS += "-I${STAGING_INCDIR}/libdrm"
|
||||||
|
|
||||||
|
# Change DRM card used for i.MX8-based platforms
|
||||||
|
LVGL_CONFIG_DRM_CARD:mx8-generic-bsp = "/dev/dri/card1"
|
||||||
|
|
||||||
|
do_configure:prepend() {
|
||||||
|
if [ "${LVGL_CONFIG_USE_DRM}" -eq 1 ] ; then
|
||||||
|
# Add libdrm build dependency
|
||||||
|
sed -i '/^target_link_libraries/ s@lvgl::drivers@& drm@' "${S}/CMakeLists.txt"
|
||||||
|
fi
|
||||||
|
|
||||||
|
if [ "${LVGL_CONFIG_USE_SDL}" -eq 1 ] ; then
|
||||||
|
# Add libsdl build dependency
|
||||||
|
sed -i '/^target_link_libraries/ s@lvgl::drivers@& SDL2@' "${S}/CMakeLists.txt"
|
||||||
|
fi
|
||||||
|
|
||||||
|
if [ "${LVGL_CONFIG_USE_WAYLAND}" -eq 1 ] ; then
|
||||||
|
# Add wayland build dependencies
|
||||||
|
sed -i '/^target_link_libraries/ s@lvgl::drivers@& wayland-client wayland-cursor xkbcommon@' "${S}/CMakeLists.txt"
|
||||||
|
fi
|
||||||
|
}
|
||||||
|
|
||||||
|
do_install:append() {
|
||||||
|
install -d ${D}${bindir}
|
||||||
|
install -m 0755 ${B}/lvgl_fb ${D}${bindir}/lvgl_demo
|
||||||
|
}
|
||||||
|
|
||||||
|
COMPATIBLE_MACHINE = "(ccimx6$|ccimx6ul|ccimx8m|ccimx8x|ccimx93|ccmp15)"
|
||||||
Loading…
Reference in New Issue