6697544cdf
It's designed to minimize RAM footprint by using Sprites to represent objects on the screen. The object model also facilitates partial screen updating which reduces the bandwidth needed to display. This is all handled in C. Python simply manipulates the objects with the ability to synchronize to frame timing.
79 lines
3.0 KiB
C
79 lines
3.0 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2018 Scott Shawcroft for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "shared-bindings/displayio/Palette.h"
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void common_hal_displayio_palette_construct(displayio_palette_t* self, uint16_t color_count) {
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self->max_value = color_count;
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self->colors = (uint32_t *) m_malloc(color_count * sizeof(uint16_t), false);
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uint32_t opaque_byte_count = color_count / 8;
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if (color_count % 8 > 0) {
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opaque_byte_count += 1;
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}
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self->opaque = (uint32_t *) m_malloc(opaque_byte_count, false);
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}
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void common_hal_displayio_palette_make_opaque(displayio_palette_t* self, uint32_t value) {
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self->opaque[value / 32] &= ~(0x1 << (value % 32));
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}
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void common_hal_displayio_palette_make_transparent(displayio_palette_t* self, uint32_t value) {
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self->opaque[value / 32] |= (0x1 << (value % 32));
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}
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void common_hal_displayio_palette_set_color(displayio_palette_t* self, uint32_t value, uint32_t color) {
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uint32_t shift = (value % 2) * 16;
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uint32_t masked = self->colors[value / 2] & ~(0xffff << shift);
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uint32_t b5 = (color >> 19);
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uint32_t g6 = (color >> 10) & 0x3f;
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uint32_t r5 = (color >> 3) & 0x1f;
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uint32_t packed = r5 << 11 | g6 << 5 | b5;
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// swap bytes
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packed = ((packed >> 8) & 0xff) | ((packed & 0xff) << 8);
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self->colors[value / 2] = masked | packed << shift;
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self->needs_refresh = true;
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}
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bool displayio_palette_get_color(displayio_palette_t *self, uint32_t value, uint16_t* color) {
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if (value > self->max_value) {
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return false;
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}
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if ((self->opaque[value / 32] & (0x1 << (value % 32))) != 0) {
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return false;
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}
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*color = (self->colors[value / 2] >> (16 * (value % 2))) & 0xffff;
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return true;
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}
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bool displayio_palette_needs_refresh(displayio_palette_t *self) {
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return self->needs_refresh;
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}
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void displayio_palette_finish_refresh(displayio_palette_t *self) {
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self->needs_refresh = false;
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}
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