79 lines
3.1 KiB
C
79 lines
3.1 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) 2019 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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#ifndef MICROPY_INCLUDED_SHARED_MODULE_DISPLAYIO_AREA_H
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#define MICROPY_INCLUDED_SHARED_MODULE_DISPLAYIO_AREA_H
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// Implementations are in __init__.c
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typedef struct _displayio_area_t displayio_area_t;
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struct _displayio_area_t {
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int16_t x1;
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int16_t y1;
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int16_t x2; // Second point is exclusive.
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int16_t y2;
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const displayio_area_t *next; // Next area in the linked list.
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};
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typedef struct {
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uint16_t x;
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uint16_t y;
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int8_t dx;
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int8_t dy;
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uint8_t scale;
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uint16_t width;
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uint16_t height;
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bool mirror_x;
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bool mirror_y;
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bool transpose_xy;
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} displayio_buffer_transform_t;
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extern displayio_buffer_transform_t null_transform;
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bool displayio_area_empty(const displayio_area_t *a);
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void displayio_area_copy_coords(const displayio_area_t *src, displayio_area_t *dest);
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void displayio_area_canon(displayio_area_t *a);
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void displayio_area_union(const displayio_area_t *a,
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const displayio_area_t *b,
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displayio_area_t *u);
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void displayio_area_expand(displayio_area_t *original, const displayio_area_t *addition);
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void displayio_area_copy(const displayio_area_t *src, displayio_area_t *dst);
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void displayio_area_scale(displayio_area_t *area, uint16_t scale);
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void displayio_area_shift(displayio_area_t *area, int16_t dx, int16_t dy);
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bool displayio_area_compute_overlap(const displayio_area_t *a,
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const displayio_area_t *b,
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displayio_area_t *overlap);
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uint16_t displayio_area_width(const displayio_area_t *area);
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uint16_t displayio_area_height(const displayio_area_t *area);
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uint32_t displayio_area_size(const displayio_area_t *area);
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bool displayio_area_equal(const displayio_area_t *a, const displayio_area_t *b);
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void displayio_area_transform_within(bool mirror_x, bool mirror_y, bool transpose_xy,
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const displayio_area_t *original,
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const displayio_area_t *whole,
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displayio_area_t *transformed);
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#endif // MICROPY_INCLUDED_SHARED_MODULE_DISPLAYIO_AREA_H
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