forked from forks/qmk_firmware
56 lines
2.3 KiB
Markdown
56 lines
2.3 KiB
Markdown
# Quantum Painter LVGL Integration :id=lvgl
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LVGL (Light and Versatile Graphics Library) is an open-source graphics library providing everything you need to create an embedded GUI for your board with easy-to-use graphical elements.
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LVGL integrates with [Quantum Painter's](quantum_painter.md) API and drivers to render to the display, the hardware supported by Quantum Painter is also supported by LVGL.
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?> Keep in mind that enabling the LVGL integration has a big impact in firmware size, it is recommeded to use a supported MCU with >256 kB of flash space.
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To learn more about LVGL and how to use it please take a look at their [official documentation](https://docs.lvgl.io/8.2/intro/)
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## Enabling LVGL :id=lvgl-enabling
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To enable LVGL to be built into your firmware, add the following to `rules.mk`:
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```make
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QUANTUM_PAINTER_ENABLE = yes
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QUANTUM_PAINTER_DRIVERS = ......
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QUANTUM_PAINTER_LVGL_INTEGRATION = yes
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```
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To configure the Quantum Painter Display Drivers please read the [Quantum Painter Display Drivers](quantum_painter.md#quantum-painter-drivers) section.
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## Quantum Painter LVGL API :id=lvgl-api
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### Quantum Painter LVGL Attach :id=lvgl-api-init
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```c
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bool qp_lvgl_attach(painter_device_t device);
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```
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The `qp_lvgl_attach` function is used to set up LVGL with the supplied display, and requires an already configured display.
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```c
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static painter_device_t display;
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void keyboard_post_init_kb(void) {
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display = qp_make_.......; // Create the display
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qp_init(display, QP_ROTATION_0); // Initialise the display
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if (qp_lvgl_attach(display)) { // Attach LVGL to the display
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...Your code to draw // Run LVGL specific code to draw
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}
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}
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```
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To init. the display please read the [Display Initialisation](quantum_painter.md#quantum-painter-api-init) section.
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!> Attaching LVGL to a display means LVGL subsequently "owns" the display. Using standard Quantum Painter drawing operations with the display after LVGL attachment will likely result in display artifacts.
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### Quantum Painter LVGL Detach :id=lvgl-api-init
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```c
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void qp_lvgl_detach(void)
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```
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The `qp_lvgl_detach` function stops the internal LVGL ticks and releases resources related to it.
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## Enabling/Disabling LVGL features :id=lvgl-configuring
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You can overwrite LVGL specific features in your `lv_conf.h` file.
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