generalize lv-font creation

In https://github.com/InfiniTimeOrg/InfiniTime/pull/1097 new font
generation capabilites were added. Generalize the font creation to
make it possible to reuse the `displayapp/fonts/CMakeLists.txt` file
for `InfiniSim` and just add the new cmake file to the project and
link against the new `infinitime_fonts` target.

In the following a list of changes.

Allow non-global installed `lv_font_conv` executable installed with

```sh
npm install lv_font_conv@1.5.2
```

In CMake we search for `lv_font_conv` executable. Add the found
executable to the python script `generate.py`, to remove the need for
`lv_font_conv` to be in the path.

Search for `python3` executable, if CMake version 3.12 is available.
Otherwise use `python` as hard coded executable.

Instead of adding the generated fonts to `SOURCE_FILES` variable, create
a static library `infinitime_fonts`. Link this library to the
executables instead.

Use `add_custom_target()` together with `add_custom_command()` to
generate the font.c files once (like the original PR does).

1 files changed, 15 insertions, 14 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index bacd67c1..bcf40920 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -373,7 +373,6 @@ list(APPEND IMAGE_FILES
         displayapp/icons/bluetooth/os_bt_disconnected.c
 
         )
-include(displayapp/fonts/CMakeLists.txt)
 list(APPEND SOURCE_FILES
         BootloaderVersion.cpp
         logging/NrfLogger.cpp
@@ -465,7 +464,6 @@ list(APPEND SOURCE_FILES
         components/ble/MusicService.cpp
         components/ble/weather/WeatherService.cpp
         components/ble/NavigationService.cpp
-        displayapp/fonts/lv_font_navi_80.c
         components/ble/BatteryInformationService.cpp
         components/ble/FSService.cpp
         components/ble/ImmediateAlertService.cpp
@@ -484,12 +482,6 @@ list(APPEND SOURCE_FILES
         FreeRTOS/port_cmsis.c
 
         displayapp/LittleVgl.cpp
-        displayapp/fonts/jetbrains_mono_extrabold_compressed.c
-        displayapp/fonts/jetbrains_mono_bold_20.c
-        displayapp/fonts/jetbrains_mono_76.c
-        displayapp/fonts/jetbrains_mono_42.c
-        displayapp/fonts/lv_font_sys_48.c
-        displayapp/fonts/open_sans_light.c
         displayapp/lv_pinetime_theme.c
 
         systemtask/SystemTask.cpp
@@ -803,6 +795,15 @@ if (NOT CMAKE_BUILD_TYPE)
     set(CMAKE_BUILD_TYPE "Release")
 endif ()
 
+add_subdirectory(displayapp/fonts)
+target_compile_options(infinitime_fonts PUBLIC
+        $<$<AND:$<COMPILE_LANGUAGE:C>,$<CONFIG:DEBUG>>: ${COMMON_FLAGS} -Og -g3>
+        $<$<AND:$<COMPILE_LANGUAGE:C>,$<CONFIG:RELEASE>>: ${COMMON_FLAGS} -Os>
+        $<$<AND:$<COMPILE_LANGUAGE:CXX>,$<CONFIG:DEBUG>>: ${COMMON_FLAGS} -Og -g3 -fno-rtti>
+        $<$<AND:$<COMPILE_LANGUAGE:CXX>,$<CONFIG:RELEASE>>: ${COMMON_FLAGS} -Os -fno-rtti>
+        $<$<COMPILE_LANGUAGE:ASM>: -MP -MD -x assembler-with-cpp>
+        )
+
 # NRF SDK
 add_library(nrf-sdk STATIC ${SDK_SOURCE_FILES})
 target_include_directories(nrf-sdk SYSTEM PUBLIC . ../)
@@ -876,7 +877,7 @@ set(EXECUTABLE_FILE_NAME ${EXECUTABLE_NAME}-${pinetime_VERSION_MAJOR}.${pinetime
 set(NRF5_LINKER_SCRIPT "${CMAKE_SOURCE_DIR}/gcc_nrf52.ld")
 add_executable(${EXECUTABLE_NAME} ${SOURCE_FILES})
 set_target_properties(${EXECUTABLE_NAME} PROPERTIES OUTPUT_NAME ${EXECUTABLE_FILE_NAME})
-target_link_libraries(${EXECUTABLE_NAME} nimble nrf-sdk lvgl littlefs QCBOR)
+target_link_libraries(${EXECUTABLE_NAME} nimble nrf-sdk lvgl littlefs QCBOR infinitime_fonts)
 target_compile_options(${EXECUTABLE_NAME} PUBLIC
         $<$<AND:$<COMPILE_LANGUAGE:C>,$<CONFIG:DEBUG>>: ${COMMON_FLAGS} -Wextra -Wformat -Wno-missing-field-initializers -Wno-unused-parameter -Og -g3>
         $<$<AND:$<COMPILE_LANGUAGE:C>,$<CONFIG:RELEASE>>: ${COMMON_FLAGS} -Wextra -Wformat -Wno-missing-field-initializers -Wno-unused-parameter -Os>
@@ -904,7 +905,7 @@ set(IMAGE_MCUBOOT_FILE_NAME ${EXECUTABLE_MCUBOOT_NAME}-image-${pinetime_VERSION_
 set(DFU_MCUBOOT_FILE_NAME ${EXECUTABLE_MCUBOOT_NAME}-dfu-${pinetime_VERSION_MAJOR}.${pinetime_VERSION_MINOR}.${pinetime_VERSION_PATCH}.zip)
 set(NRF5_LINKER_SCRIPT_MCUBOOT "${CMAKE_SOURCE_DIR}/gcc_nrf52-mcuboot.ld")
 add_executable(${EXECUTABLE_MCUBOOT_NAME} ${SOURCE_FILES})
-target_link_libraries(${EXECUTABLE_MCUBOOT_NAME} nimble nrf-sdk lvgl littlefs QCBOR)
+target_link_libraries(${EXECUTABLE_MCUBOOT_NAME} nimble nrf-sdk lvgl littlefs QCBOR infinitime_fonts)
 set_target_properties(${EXECUTABLE_MCUBOOT_NAME} PROPERTIES OUTPUT_NAME ${EXECUTABLE_MCUBOOT_FILE_NAME})
 target_compile_options(${EXECUTABLE_MCUBOOT_NAME} PUBLIC
         $<$<AND:$<COMPILE_LANGUAGE:C>,$<CONFIG:DEBUG>>: ${COMMON_FLAGS} -Og -g3>
@@ -940,7 +941,7 @@ endif()
 set(EXECUTABLE_RECOVERY_NAME "pinetime-recovery")
 set(EXECUTABLE_RECOVERY_FILE_NAME ${EXECUTABLE_RECOVERY_NAME}-${pinetime_VERSION_MAJOR}.${pinetime_VERSION_MINOR}.${pinetime_VERSION_PATCH})
 add_executable(${EXECUTABLE_RECOVERY_NAME} ${RECOVERY_SOURCE_FILES})
-target_link_libraries(${EXECUTABLE_RECOVERY_NAME} nimble nrf-sdk littlefs QCBOR)
+target_link_libraries(${EXECUTABLE_RECOVERY_NAME} nimble nrf-sdk littlefs QCBOR infinitime_fonts)
 set_target_properties(${EXECUTABLE_RECOVERY_NAME} PROPERTIES OUTPUT_NAME ${EXECUTABLE_RECOVERY_FILE_NAME})
 target_compile_definitions(${EXECUTABLE_RECOVERY_NAME} PUBLIC "PINETIME_IS_RECOVERY")
 target_compile_options(${EXECUTABLE_RECOVERY_NAME} PUBLIC
@@ -970,7 +971,7 @@ set(EXECUTABLE_RECOVERY_MCUBOOT_FILE_NAME ${EXECUTABLE_RECOVERY_MCUBOOT_NAME}-${
 set(IMAGE_RECOVERY_MCUBOOT_FILE_NAME ${EXECUTABLE_RECOVERY_MCUBOOT_NAME}-image-${pinetime_VERSION_MAJOR}.${pinetime_VERSION_MINOR}.${pinetime_VERSION_PATCH}.bin)
 set(DFU_RECOVERY_MCUBOOT_FILE_NAME ${EXECUTABLE_RECOVERY_MCUBOOT_NAME}-dfu-${pinetime_VERSION_MAJOR}.${pinetime_VERSION_MINOR}.${pinetime_VERSION_PATCH}.zip)
 add_executable(${EXECUTABLE_RECOVERY_MCUBOOT_NAME} ${RECOVERY_SOURCE_FILES})
-target_link_libraries(${EXECUTABLE_RECOVERY_MCUBOOT_NAME} nimble nrf-sdk littlefs QCBOR)
+target_link_libraries(${EXECUTABLE_RECOVERY_MCUBOOT_NAME} nimble nrf-sdk littlefs QCBOR infinitime_fonts)
 set_target_properties(${EXECUTABLE_RECOVERY_MCUBOOT_NAME} PROPERTIES OUTPUT_NAME ${EXECUTABLE_RECOVERY_MCUBOOT_FILE_NAME})
 target_compile_definitions(${EXECUTABLE_RECOVERY_MCUBOOT_NAME} PUBLIC "PINETIME_IS_RECOVERY")
 target_compile_options(${EXECUTABLE_RECOVERY_MCUBOOT_NAME} PUBLIC
@@ -1008,7 +1009,7 @@ endif()
 set(EXECUTABLE_RECOVERYLOADER_NAME "pinetime-recovery-loader")
 set(EXECUTABLE_RECOVERYLOADER_FILE_NAME ${EXECUTABLE_RECOVERYLOADER_NAME}-${pinetime_VERSION_MAJOR}.${pinetime_VERSION_MINOR}.${pinetime_VERSION_PATCH})
 add_executable(${EXECUTABLE_RECOVERYLOADER_NAME} ${RECOVERYLOADER_SOURCE_FILES})
-target_link_libraries(${EXECUTABLE_RECOVERYLOADER_NAME} nrf-sdk QCBOR)
+target_link_libraries(${EXECUTABLE_RECOVERYLOADER_NAME} nrf-sdk QCBOR infinitime_fonts)
 set_target_properties(${EXECUTABLE_RECOVERYLOADER_NAME} PROPERTIES OUTPUT_NAME ${EXECUTABLE_RECOVERYLOADER_FILE_NAME})
 target_compile_options(${EXECUTABLE_RECOVERYLOADER_NAME} PUBLIC
         $<$<AND:$<COMPILE_LANGUAGE:C>,$<CONFIG:DEBUG>>: ${COMMON_FLAGS} -Og -g3>
@@ -1041,7 +1042,7 @@ set(EXECUTABLE_MCUBOOT_RECOVERYLOADER_FILE_NAME ${EXECUTABLE_MCUBOOT_RECOVERYLOA
 set(IMAGE_MCUBOOT_RECOVERYLOADER_FILE_NAME ${EXECUTABLE_MCUBOOT_RECOVERYLOADER_NAME}-image-${pinetime_VERSION_MAJOR}.${pinetime_VERSION_MINOR}.${pinetime_VERSION_PATCH}.bin)
 set(DFU_MCUBOOT_RECOVERYLOADER_FILE_NAME ${EXECUTABLE_MCUBOOT_RECOVERYLOADER_NAME}-dfu-${pinetime_VERSION_MAJOR}.${pinetime_VERSION_MINOR}.${pinetime_VERSION_PATCH}.zip)
 add_executable(${EXECUTABLE_MCUBOOT_RECOVERYLOADER_NAME} ${RECOVERYLOADER_SOURCE_FILES})
-target_link_libraries(${EXECUTABLE_MCUBOOT_RECOVERYLOADER_NAME} nrf-sdk QCBOR)
+target_link_libraries(${EXECUTABLE_MCUBOOT_RECOVERYLOADER_NAME} nrf-sdk QCBOR infinitime_fonts)
 set_target_properties(${EXECUTABLE_MCUBOOT_RECOVERYLOADER_NAME} PROPERTIES OUTPUT_NAME ${EXECUTABLE_MCUBOOT_RECOVERYLOADER_FILE_NAME})
 target_compile_options(${EXECUTABLE_MCUBOOT_RECOVERYLOADER_NAME} PUBLIC
         $<$<AND:$<COMPILE_LANGUAGE:C>,$<CONFIG:DEBUG>>: ${COMMON_FLAGS} -Og -g3>