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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2018 Scott Shawcroft for Adafruit Industries
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "shared-bindings/displayio/Palette.h"
#include "shared-module/displayio/ColorConverter.h"
void common_hal_displayio_palette_construct(displayio_palette_t *self, uint16_t color_count) {
self->color_count = color_count;
self->colors = (_displayio_color_t *)m_malloc(color_count * sizeof(_displayio_color_t), false);
}
void common_hal_displayio_palette_make_opaque(displayio_palette_t *self, uint32_t palette_index) {
self->colors[palette_index].transparent = false;
self->needs_refresh = true;
}
void common_hal_displayio_palette_make_transparent(displayio_palette_t *self, uint32_t palette_index) {
self->colors[palette_index].transparent = true;
self->needs_refresh = true;
}
bool common_hal_displayio_palette_is_transparent(displayio_palette_t *self, uint32_t palette_index) {
return self->colors[palette_index].transparent;
}
uint32_t common_hal_displayio_palette_get_len(displayio_palette_t *self) {
return self->color_count;
}
void common_hal_displayio_palette_set_color(displayio_palette_t *self, uint32_t palette_index, uint32_t color) {
if (self->colors[palette_index].rgb888 == color) {
return;
}
self->colors[palette_index].rgb888 = color;
self->colors[palette_index].luma = displayio_colorconverter_compute_luma(color);
self->colors[palette_index].rgb565 = displayio_colorconverter_compute_rgb565(color);
uint8_t chroma = displayio_colorconverter_compute_chroma(color);
self->colors[palette_index].chroma = chroma;
self->colors[palette_index].hue = displayio_colorconverter_compute_hue(color);
self->needs_refresh = true;
}
uint32_t common_hal_displayio_palette_get_color(displayio_palette_t *self, uint32_t palette_index) {
return self->colors[palette_index].rgb888;
}
bool displayio_palette_get_color(displayio_palette_t *self, const _displayio_colorspace_t *colorspace, uint32_t palette_index, uint32_t *color) {
if (palette_index > self->color_count || self->colors[palette_index].transparent) {
return false; // returns transparent
}
if (colorspace->tricolor) {
uint8_t luma = self->colors[palette_index].luma;
*color = luma >> (8 - colorspace->depth);
// Chroma 0 means the color is a gray and has no hue so never color based on it.
if (self->colors[palette_index].chroma <= 16) {
if (!colorspace->grayscale) {
*color = 0;
}
return true;
}
uint8_t pixel_hue = self->colors[palette_index].hue;
displayio_colorconverter_compute_tricolor(colorspace, pixel_hue, color);
} else if (colorspace->grayscale) {
size_t bitmask = (1 << colorspace->depth) - 1;
*color = (self->colors[palette_index].luma >> colorspace->grayscale_bit) & bitmask;
} else if (colorspace->depth == 16) {
uint16_t packed = self->colors[palette_index].rgb565;
if (colorspace->reverse_bytes_in_word) {
// swap bytes
packed = __builtin_bswap16(packed);
}
*color = packed;
} else if (colorspace->depth == 32) {
*color = self->colors[palette_index].rgb888;
} else {
return false;
}
return true;
}
bool displayio_palette_needs_refresh(displayio_palette_t *self) {
return self->needs_refresh;
}
void displayio_palette_finish_refresh(displayio_palette_t *self) {
self->needs_refresh = false;
}
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