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circuitpython/shared-module/displayio/__init__.c

190 lines
6.4 KiB

#include <string.h>
#include "shared-module/displayio/__init__.h"
#include "shared-bindings/displayio/Bitmap.h"
#include "shared-bindings/displayio/Display.h"
#include "shared-bindings/displayio/Group.h"
#include "shared-bindings/displayio/Palette.h"
#include "shared-bindings/displayio/Sprite.h"
#include "supervisor/shared/display.h"
#include "supervisor/usb.h"
primary_display_t displays[CIRCUITPY_DISPLAY_LIMIT];
void displayio_refresh_displays(void) {
for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
if (displays[i].display.base.type == NULL || displays[i].display.base.type == &mp_type_NoneType) {
continue;
}
displayio_display_obj_t* display = &displays[i].display;
if (!displayio_display_frame_queued(display)) {
return;
}
if (displayio_display_refresh_queued(display)) {
// We compute the pixels
uint16_t x0 = 0;
uint16_t y0 = 0;
uint16_t x1 = display->width;
uint16_t y1 = display->height;
size_t index = 0;
//size_t row_size = (x1 - x0);
uint16_t buffer_size = 256;
uint32_t buffer[buffer_size / 2];
displayio_display_start_region_update(display, x0, y0, x1, y1);
for (uint16_t y = y0; y < y1; ++y) {
for (uint16_t x = x0; x < x1; ++x) {
uint16_t* pixel = &(((uint16_t*)buffer)[index]);
*pixel = 0;
if (display->current_group != NULL) {
displayio_group_get_pixel(display->current_group, x, y, pixel);
}
index += 1;
// The buffer is full, send it.
if (index >= buffer_size) {
if (!displayio_display_send_pixels(display, buffer, buffer_size / 2)) {
displayio_display_finish_region_update(display);
return;
}
// TODO(tannewt): Make refresh displays faster so we don't starve other
// background tasks.
usb_background();
index = 0;
}
}
}
// Send the remaining data.
if (index && !displayio_display_send_pixels(display, buffer, index * 2)) {
displayio_display_finish_region_update(display);
return;
}
displayio_display_finish_region_update(display);
}
displayio_display_finish_refresh(display);
}
}
uint32_t blinka_bitmap_data[32] = {
0x00000011, 0x11000000,
0x00000111, 0x53100000,
0x00000111, 0x56110000,
0x00000111, 0x11140000,
0x00000111, 0x20002000,
0x00000011, 0x13000000,
0x00000001, 0x11200000,
0x00000000, 0x11330000,
0x00000000, 0x01122000,
0x00001111, 0x44133000,
0x00032323, 0x24112200,
0x00111114, 0x44113300,
0x00323232, 0x34112200,
0x11111144, 0x44443300,
0x11111111, 0x11144401,
0x23232323, 0x21111110
};
displayio_bitmap_t blinka_bitmap = {
.base = {.type = &displayio_bitmap_type },
.width = 16,
.height = 16,
.data = blinka_bitmap_data,
.stride = 2,
.bits_per_value = 4,
.x_shift = 3,
.x_mask = 0x7,
.bitmask = 0xf
};
uint32_t blinka_transparency[1] = {0x80000000};
// These colors are RGB 565 with the bytes swapped.
uint32_t blinka_colors[8] = {0x78890000, 0x9F86B8FC, 0xffff0D5A, 0x0000f501,
0x00000000, 0x00000000, 0x00000000, 0x00000000};
displayio_palette_t blinka_palette = {
.base = {.type = &displayio_palette_type },
.opaque = blinka_transparency,
.colors = blinka_colors,
.color_count = 16,
.needs_refresh = false
};
displayio_sprite_t blinka_sprite = {
.base = {.type = &displayio_sprite_type },
.bitmap = &blinka_bitmap,
.pixel_shader = &blinka_palette,
.x = 0,
.y = 0,
.width = 16,
.height = 16,
.needs_refresh = false
};
mp_obj_t splash_children[1] = {
&blinka_sprite,
};
displayio_group_t splash = {
.base = {.type = &displayio_group_type },
.x = 0,
.y = 0,
.scale = 2,
.size = 1,
.max_size = 1,
.children = splash_children,
.needs_refresh = true
};
void reset_displays(void) {
// The SPI buses used by FourWires may be allocated on the heap so we need to move them inline.
for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
if (displays[i].fourwire_bus.base.type != &displayio_fourwire_type) {
continue;
}
displayio_fourwire_obj_t* fourwire = &displays[i].fourwire_bus;
if (((uint32_t) fourwire->bus) < ((uint32_t) &displays) ||
((uint32_t) fourwire->bus) > ((uint32_t) &displays + CIRCUITPY_DISPLAY_LIMIT)) {
busio_spi_obj_t* original_spi = fourwire->bus;
if (original_spi == board_spi()) {
continue;
}
memcpy(&fourwire->inline_bus, original_spi, sizeof(busio_spi_obj_t));
fourwire->bus = &fourwire->inline_bus;
// Check for other displays that use the same spi bus and swap them too.
for (uint8_t j = i + 1; j < CIRCUITPY_DISPLAY_LIMIT; j++) {
if (displays[i].fourwire_bus.bus == original_spi) {
displays[i].fourwire_bus.bus = &fourwire->inline_bus;
}
}
}
}
for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
if (displays[i].display.base.type == NULL) {
continue;
}
displayio_display_obj_t* display = &displays[i].display;
common_hal_displayio_display_show(display, &splash);
}
}
void common_hal_displayio_release_displays(void) {
for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
mp_const_obj_t bus_type = displays[i].fourwire_bus.base.type;
if (bus_type == NULL) {
continue;
} else if (bus_type == &displayio_fourwire_type) {
common_hal_displayio_fourwire_deinit(&displays[i].fourwire_bus);
} else if (bus_type == &displayio_parallelbus_type) {
common_hal_displayio_parallelbus_deinit(&displays[i].parallel_bus);
}
displays[i].fourwire_bus.base.type = &mp_type_NoneType;
}
for (uint8_t i = 0; i < CIRCUITPY_DISPLAY_LIMIT; i++) {
displays[i].display.base.type = &mp_type_NoneType;
}
}