Quantum Painter (#10174)

* Install dependencies before executing unit tests.

* Split out UTF-8 decoder.

* Fixup python formatting rules.

* Add documentation for QGF/QFF and the RLE format used.

* Add CLI commands for converting images and fonts.

* Add stub rules.mk for QP.

* Add stream type.

* Add base driver and comms interfaces.

* Add support for SPI, SPI+D/C comms drivers.

* Include <qp.h> when enabled.

* Add base support for SPI+D/C+RST panels, as well as concrete implementation of ST7789.

* Add support for GC9A01.

* Add support for ILI9341.

* Add support for ILI9163.

* Add support for SSD1351.

* Implement qp_setpixel, including pixdata buffer management.

* Implement qp_line.

* Implement qp_rect.

* Implement qp_circle.

* Implement qp_ellipse.

* Implement palette interpolation.

* Allow for streams to work with either flash or RAM.

* Image loading.

* Font loading.

* QGF palette loading.

* Progressive decoder of pixel data supporting Raw+RLE, 1-,2-,4-,8-bpp monochrome and palette-based images.

* Image drawing.

* Animations.

* Font rendering.

* Check against 256 colours, dump out the loaded palette if debugging enabled.

* Fix build.

* AVR is not the intended audience.

* `qmk format-c`

* Generation fix.

* First batch of docs.

* More docs and examples.

* Review comments.

* Public API documentation.

1 files changed, 453 insertions, 0 deletions

diff --git a/quantum/painter/qp.h b/quantum/painter/qp.h
new file mode 100644
index 0000000000..e1c14d156c
--- /dev/null
+++ b/quantum/painter/qp.h
@@ -0,0 +1,453 @@
+// Copyright 2021 Nick Brassel (@tzarc)
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+
+#include "deferred_exec.h"
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Quantum Painter global configurables (add to your keyboard's config.h)
+
+#ifndef QUANTUM_PAINTER_NUM_IMAGES
+/**
+ * @def This controls the maximum number of images that Quantum Painter can load at any one time. Images can be loaded
+ *      using \ref qp_load_image_mem, and can be unloaded by calling \ref qp_close_image. Increasing this number in
+ *      order to load more images increases the amount of RAM required. Image data is not held in RAM, just metadata.
+ */
+#    define QUANTUM_PAINTER_NUM_IMAGES 8
+#endif // QUANTUM_PAINTER_NUM_IMAGES
+
+#ifndef QUANTUM_PAINTER_NUM_FONTS
+/**
+ * @def This controls the maximum number of fonts that Quantum Painter can load. Fonts can be loaded using
+ *      \ref qp_load_font_mem, and can be unloaded by calling \ref qp_close_font. Increasing this number in order to
+ *      load more fonts increases the amount of RAM required. Font data is not held in RAM, unless
+ *      \ref QUANTUM_PAINTER_LOAD_FONTS_TO_RAM is set to TRUE.
+ */
+#    define QUANTUM_PAINTER_NUM_FONTS 4
+#endif // QUANTUM_PAINTER_NUM_FONTS
+
+#ifndef QUANTUM_PAINTER_LOAD_FONTS_TO_RAM
+/**
+ * @def This controls whether or not fonts should be cached in RAM. Under normal circumstances, fonts can have quite
+ *      random access patterns, and due to timing of flash memory or external storage, it may be a significant speedup
+ *      moving the font into RAM before use. Defaults to "off", but if it's enabled it will fallback to reading from the
+ *      original location if corresponding RAM could not be allocated (such as being too large).
+ */
+#    define QUANTUM_PAINTER_LOAD_FONTS_TO_RAM FALSE
+#endif
+
+#ifndef QUANTUM_PAINTER_CONCURRENT_ANIMATIONS
+/**
+ * @def This controls the maximum number of animations that Quantum Painter can play simultaneously. Increasing this
+ *      number in order to play more animations at the same time increases the amount of RAM required.
+ */
+#    define QUANTUM_PAINTER_CONCURRENT_ANIMATIONS 4
+#endif // QUANTUM_PAINTER_CONCURRENT_ANIMATIONS
+
+#ifndef QUANTUM_PAINTER_PIXDATA_BUFFER_SIZE
+/**
+ * @def This controls the maximum size of the pixel data buffer used for single blocks of transmission. Larger buffers
+ *      means more data is processed at one time, with less frequent transmissions, at the cost of RAM.
+ */
+#    define QUANTUM_PAINTER_PIXDATA_BUFFER_SIZE 32
+#endif
+
+#ifndef QUANTUM_PAINTER_SUPPORTS_256_PALETTE
+/**
+ * @def This controls whether 256-color palettes are supported. This has relatively hefty requirements on RAM -- at
+ *      least 1kB extra is required just to store the palette information, with more required for other metadata.
+ */
+#    define QUANTUM_PAINTER_SUPPORTS_256_PALETTE FALSE
+#endif
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Quantum Painter types
+
+/**
+ * @typedef A handle to a Quantum Painter device, such as an LCD or OLED. Most Quantum Painter APIs require this
+ *          argument in order to perform operations on the display.
+ */
+typedef const void *painter_device_t;
+
+/**
+ * @typedef The desired rotation of a panel. Used as a parameter to \ref qp_init, and can be queried by
+ *          \ref qp_get_geometry.
+ */
+typedef enum { QP_ROTATION_0, QP_ROTATION_90, QP_ROTATION_180, QP_ROTATION_270 } painter_rotation_t;
+
+/**
+ * @typedef A descriptor for a Quantum Painter image.
+ */
+typedef struct painter_image_desc_t {
+    uint16_t width;       ///< Image width
+    uint16_t height;      ///< Image height
+    uint16_t frame_count; ///< Number of frames in this image
+} painter_image_desc_t;
+
+/**
+ * @typedef A handle to a Quantum Painter image.
+ */
+typedef const painter_image_desc_t *painter_image_handle_t;
+
+/**
+ * @typedef A descriptor for a Quantum Painter font.
+ */
+typedef struct painter_font_desc_t {
+    uint8_t line_height; ///< The number of pixels in height for each line
+} painter_font_desc_t;
+
+/**
+ * @typedef A handle to a Quantum Painter font.
+ */
+typedef const painter_font_desc_t *painter_font_handle_t;
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Quantum Painter External API
+
+/**
+ * Initialize a device and set its rotation.
+ *
+ * @param device[in] the handle of the device to initialize
+ * @param rotation[in] the rotation to use
+ * @return true if initialization succeeded
+ * @return false if initialization failed
+ */
+bool qp_init(painter_device_t device, painter_rotation_t rotation);
+
+/**
+ * Controls whether a display is on or off.
+ *
+ * @note If backlighting is used to control brightness (such as for an LCD), it will need to be handled external to
+ *       Quantum Painter.
+ *
+ * @param device[in] the handle of the device to control
+ * @param power_on[in] whether or not the device should be on
+ * @return true if controlling the power state succeeded
+ * @return false if controlling the power state failed
+ */
+bool qp_power(painter_device_t device, bool power_on);
+
+/**
+ * Clears a device's screen.
+ *
+ * @param device[in] the handle of the device to control
+ * @return true if clearing the screen succeeded
+ * @return false if clearing the screen failed
+ */
+bool qp_clear(painter_device_t device);
+
+/**
+ * Transmits any outstanding data to the screen in order to persist all changes to the display.
+ *
+ * @note Drivers without internal framebuffers will likely ignore this API.
+ *
+ * @param device[in] the handle of the device to control
+ * @return true if flushing changes to the screen succeeded
+ * @return false if flushing changes to the screen failed
+ */
+bool qp_flush(painter_device_t device);
+
+/**
+ * Retrieves the size, rotation, and offsets for the display.
+ *
+ * @note Any arguments of NULL will be ignored.
+ *
+ * @param device[in] the handle of the device to control
+ * @param width[out] the device's width
+ * @param height[out] the device's height
+ * @param rotation[out] the device's rotation
+ * @param offset_x[out] the device's x-offset applied while drawing
+ * @param offset_y[out] the device's y-offset applied while drawing
+ */
+void qp_get_geometry(painter_device_t device, uint16_t *width, uint16_t *height, painter_rotation_t *rotation, uint16_t *offset_x, uint16_t *offset_y);
+
+/**
+ * Allows repositioning of the viewport if the panel geometry offsets are non-zero.
+ *
+ * @param device[in] the handle of the device to control
+ * @param offset_x[in] the device's x-offset applied while drawing
+ * @param offset_y[in] the device's y-offset applied while drawing
+ */
+void qp_set_viewport_offsets(painter_device_t device, uint16_t offset_x, uint16_t offset_y);
+
+/**
+ * Sets a pixel to the specified color.
+ *
+ * @param device[in] the handle of the device to control
+ * @param x[in] the x-position to draw onto the device
+ * @param y[in] the y-position to draw onto the device
+ * @param hue[in] the hue to use, with 0-360 mapped to 0-255
+ * @param sat[in] the saturation to use, with 0-100% mapped to 0-255
+ * @param val[in] the value to use, with 0-100% mapped to 0-255
+ * @return true if setting the pixel succeeded
+ * @return false if setting the pixel failed
+ */
+bool qp_setpixel(painter_device_t device, uint16_t x, uint16_t y, uint8_t hue, uint8_t sat, uint8_t val);
+
+/**
+ * Draws a line using the specified color.
+ *
+ * @param device[in] the handle of the device to control
+ * @param x0[in] the device's x-position to start
+ * @param y0[in] the device's y-position to start
+ * @param x1[in] the device's x-position to finish
+ * @param y1[in] the device's y-position to finish
+ * @param hue[in] the hue to use, with 0-360 mapped to 0-255
+ * @param sat[in] the saturation to use, with 0-100% mapped to 0-255
+ * @param val[in] the value to use, with 0-100% mapped to 0-255
+ * @return true if drawing the line succeeded
+ * @return false if drawing the line failed
+ */
+bool qp_line(painter_device_t device, uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint8_t hue, uint8_t sat, uint8_t val);
+
+/**
+ * Draws a rectangle using the specified color, optionally filled.
+ *
+ * @param device[in] the handle of the device to control
+ * @param left[in] the device's x-position to start
+ * @param top[in] the device's y-position to start
+ * @param right[in] the device's x-position to finish
+ * @param bottom[in] the device's y-position to finish
+ * @param hue[in] the hue to use, with 0-360 mapped to 0-255
+ * @param sat[in] the saturation to use, with 0-100% mapped to 0-255
+ * @param val[in] the value to use, with 0-100% mapped to 0-255
+ * @param filled[in] whether the rectangle should be filled
+ * @return true if drawing the rectangle succeeded
+ * @return false if drawing the rectangle failed
+ */
+bool qp_rect(painter_device_t device, uint16_t left, uint16_t top, uint16_t right, uint16_t bottom, uint8_t hue, uint8_t sat, uint8_t val, bool filled);
+
+/**
+ * Draws a circle using the specified color, optionally filled.
+ *
+ * @param device[in] the handle of the device to control
+ * @param x[in] the x-position of the centre of the circle to draw onto the device
+ * @param y[in] the y-position of the centre of the circle to draw onto the device
+ * @param radius[in] the radius of the circle to draw
+ * @param hue[in] the hue to use, with 0-360 mapped to 0-255
+ * @param sat[in] the saturation to use, with 0-100% mapped to 0-255
+ * @param val[in] the value to use, with 0-100% mapped to 0-255
+ * @param filled[in] whether the circle should be filled
+ * @return true if drawing the circle succeeded
+ * @return false if drawing the circle failed
+ */
+bool qp_circle(painter_device_t device, uint16_t x, uint16_t y, uint16_t radius, uint8_t hue, uint8_t sat, uint8_t val, bool filled);
+
+/**
+ * Draws a ellipse using the specified color, optionally filled.
+ *
+ * @param device[in] the handle of the device to control
+ * @param x[in] the x-position of the centre of the ellipse to draw onto the device
+ * @param y[in] the y-position of the centre of the ellipse to draw onto the device
+ * @param sizex[in] the horizontal size of the ellipse
+ * @param sizey[in] the vertical size of the ellipse
+ * @param hue[in] the hue to use, with 0-360 mapped to 0-255
+ * @param sat[in] the saturation to use, with 0-100% mapped to 0-255
+ * @param val[in] the value to use, with 0-100% mapped to 0-255
+ * @param filled[in] whether the ellipse should be filled
+ * @return true if drawing the ellipse succeeded
+ * @return false if drawing the ellipse failed
+ */
+bool qp_ellipse(painter_device_t device, uint16_t x, uint16_t y, uint16_t sizex, uint16_t sizey, uint8_t hue, uint8_t sat, uint8_t val, bool filled);
+
+/**
+ * Sets up the location on the display to stream raw pixel data to the display, using \ref qp_pixdata.
+ *
+ * @note This is for advanced uses only, and should not be required for normal Quantum Painter functionality.
+ *
+ * @param device[in] the handle of the device to control
+ * @param left[in] the device's x-position to start
+ * @param top[in] the device's y-position to start
+ * @param right[in] the device's x-position to finish
+ * @param bottom[in] the device's y-position to finish
+ * @return true if setting the viewport succeeded
+ * @return false if setting the viewport failed
+ */
+bool qp_viewport(painter_device_t device, uint16_t left, uint16_t top, uint16_t right, uint16_t bottom);
+
+/**
+ * Streams raw pixel data (in the native panel format) to the area previously set by \ref qp_viewport.
+ *
+ * @note This is for advanced uses only, and should not be required for normal Quantum Painter functionality.
+ *
+ * @param device[in] the handle of the device to control
+ * @param pixel_data[in] pointer to buffer data
+ * @param native_pixel_count[in] the number of pixels to transmit
+ * @return true if streaming of data succeeded
+ * @return false if streaming of data failed
+ */
+bool qp_pixdata(painter_device_t device, const void *pixel_data, uint32_t native_pixel_count);
+
+/**
+ * Loads an image into memory.
+ *
+ * @note Images can be unloaded by calling \ref qp_close_image.
+ *
+ * @param buffer[in] the image data to load
+ * @return an image handle usable with \ref qp_drawimage, \ref qp_drawimage_recolor, \ref qp_animate, and
+ *         \ref qp_animate_recolor.
+ * @return NULL if loading the image failed
+ */
+painter_image_handle_t qp_load_image_mem(const void *buffer);
+
+/**
+ * Closes an image handle when no longer in use.
+ *
+ * @param image[in] the handle of the image to unload
+ * @return true if unloading the image succeeded
+ * @return false if unloading the image failed
+ */
+bool qp_close_image(painter_image_handle_t image);
+
+/**
+ * Draws an image to the display.
+ *
+ * @param device[in] the handle of the device to control
+ * @param x[in] the x-position where the image should be drawn onto the device
+ * @param y[in] the y-position where the image should be drawn onto the device
+ * @param image[in] the handle of the image to draw
+ * @return true if drawing the image succeeded
+ * @return false if drawing the image failed
+ */
+bool qp_drawimage(painter_device_t device, uint16_t x, uint16_t y, painter_image_handle_t image);
+
+/**
+ * Draws an image to the display, recoloring monochrome images to the desired foreground/background.
+ *
+ * @param device[in] the handle of the device to control
+ * @param x[in] the x-position where the image should be drawn onto the device
+ * @param y[in] the y-position where the image should be drawn onto the device
+ * @param image[in] the handle of the image to draw
+ * @param hue_fg[in] the foreground hue to use, with 0-360 mapped to 0-255
+ * @param sat_fg[in] the foreground saturation to use, with 0-100% mapped to 0-255
+ * @param val_fg[in] the foreground value to use, with 0-100% mapped to 0-255
+ * @param hue_bg[in] the background hue to use, with 0-360 mapped to 0-255
+ * @param sat_bg[in] the background saturation to use, with 0-100% mapped to 0-255
+ * @param val_bg[in] the background value to use, with 0-100% mapped to 0-255
+ * @return true if drawing the image succeeded
+ * @return false if drawing the image failed
+ */
+bool qp_drawimage_recolor(painter_device_t device, uint16_t x, uint16_t y, painter_image_handle_t image, uint8_t hue_fg, uint8_t sat_fg, uint8_t val_fg, uint8_t hue_bg, uint8_t sat_bg, uint8_t val_bg);
+
+/**
+ * Draws an animation to the display.
+ *
+ * @param device[in] the handle of the device to control
+ * @param x[in] the x-position where the image should be drawn onto the device
+ * @param y[in] the y-position where the image should be drawn onto the device
+ * @param image[in] the handle of the image to draw
+ * @return the \ref deferred_token to use with \ref qp_stop_animation in order to stop animating
+ * @return INVALID_DEFERRED_TOKEN if animating the image failed
+ */
+deferred_token qp_animate(painter_device_t device, uint16_t x, uint16_t y, painter_image_handle_t image);
+
+/**
+ * Draws an animation to the display, recoloring monochrome images to the desired foreground/background.
+ *
+ * @param device[in] the handle of the device to control
+ * @param x[in] the x-position where the image should be drawn onto the device
+ * @param y[in] the y-position where the image should be drawn onto the device
+ * @param image[in] the handle of the image to draw
+ * @param hue_fg[in] the foreground hue to use, with 0-360 mapped to 0-255
+ * @param sat_fg[in] the foreground saturation to use, with 0-100% mapped to 0-255
+ * @param val_fg[in] the foreground value to use, with 0-100% mapped to 0-255
+ * @param hue_bg[in] the background hue to use, with 0-360 mapped to 0-255
+ * @param sat_bg[in] the background saturation to use, with 0-100% mapped to 0-255
+ * @param val_bg[in] the background value to use, with 0-100% mapped to 0-255
+ * @return the \ref deferred_token to use with \ref qp_stop_animation in order to stop animating
+ * @return INVALID_DEFERRED_TOKEN if animating the image failed
+ */
+deferred_token qp_animate_recolor(painter_device_t device, uint16_t x, uint16_t y, painter_image_handle_t image, uint8_t hue_fg, uint8_t sat_fg, uint8_t val_fg, uint8_t hue_bg, uint8_t sat_bg, uint8_t val_bg);
+
+/**
+ * Cancels a running animation.
+ *
+ * @param anim_token[in] the animation token returned by \ref qp_animate, or \ref qp_animate_recolor.
+ */
+void qp_stop_animation(deferred_token anim_token);
+
+/**
+ * Loads a font into memory.
+ *
+ * @note Fonts can be unloaded by calling \ref qp_close_font.
+ *
+ * @param buffer[in] the font data to load
+ * @return an image handle usable with \ref qp_textwidth, \ref qp_drawtext, and \ref qp_drawtext_recolor.
+ * @return NULL if loading the font failed
+ */
+painter_font_handle_t qp_load_font_mem(const void *buffer);
+
+/**
+ * Closes a font handle when no longer in use.
+ *
+ * @param font[in] the handle of the font to unload
+ * @return true if unloading the font succeeded
+ * @return false if unloading the font failed
+ */
+bool qp_close_font(painter_font_handle_t font);
+
+/**
+ * Measures the width (in pixels) of the supplied string, given the specified font.
+ *
+ * @param font[in] the handle of the font
+ * @param str[in] the string to measure
+ * @return the width (in pixels) needed to draw the specified string
+ */
+int16_t qp_textwidth(painter_font_handle_t font, const char *str);
+
+/**
+ * Draws text to the display.
+ *
+ * @param device[in] the handle of the device to control
+ * @param x[in] the x-position where the text should be drawn onto the device
+ * @param y[in] the y-position where the text should be drawn onto the device
+ * @param font[in] the handle of the font
+ * @param str[in] the string to draw
+ * @return the width (in pixels) used when drawing the specified string
+ */
+int16_t qp_drawtext(painter_device_t device, uint16_t x, uint16_t y, painter_font_handle_t font, const char *str);
+
+/**
+ * Draws text to the display, recoloring monochrome fonts to the desired foreground/background.
+ *
+ * @param device[in] the handle of the device to control
+ * @param x[in] the x-position where the text should be drawn onto the device
+ * @param y[in] the y-position where the text should be drawn onto the device
+ * @param font[in] the handle of the font
+ * @param str[in] the string to draw
+ * @param hue_fg[in] the foreground hue to use, with 0-360 mapped to 0-255
+ * @param sat_fg[in] the foreground saturation to use, with 0-100% mapped to 0-255
+ * @param val_fg[in] the foreground value to use, with 0-100% mapped to 0-255
+ * @param hue_bg[in] the background hue to use, with 0-360 mapped to 0-255
+ * @param sat_bg[in] the background saturation to use, with 0-100% mapped to 0-255
+ * @param val_bg[in] the background value to use, with 0-100% mapped to 0-255
+ * @return the width (in pixels) used when drawing the specified string
+ */
+int16_t qp_drawtext_recolor(painter_device_t device, uint16_t x, uint16_t y, painter_font_handle_t font, const char *str, uint8_t hue_fg, uint8_t sat_fg, uint8_t val_fg, uint8_t hue_bg, uint8_t sat_bg, uint8_t val_bg);
+
+////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+// Quantum Painter Drivers
+
+#ifdef QUANTUM_PAINTER_ILI9163_ENABLE
+#    include "qp_ili9163.h"
+#endif // QUANTUM_PAINTER_ILI9163_ENABLE
+
+#ifdef QUANTUM_PAINTER_ILI9341_ENABLE
+#    include "qp_ili9341.h"
+#endif // QUANTUM_PAINTER_ILI9341_ENABLE
+
+#ifdef QUANTUM_PAINTER_ST7789_ENABLE
+#    include "qp_st7789.h"
+#endif // QUANTUM_PAINTER_ST7789_ENABLE
+
+#ifdef QUANTUM_PAINTER_GC9A01_ENABLE
+#    include "qp_gc9a01.h"
+#endif // QUANTUM_PAINTER_GC9A01_ENABLE
+
+#ifdef QUANTUM_PAINTER_SSD1351_ENABLE
+#    include "qp_ssd1351.h"
+#endif // QUANTUM_PAINTER_SSD1351_ENABLE