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Copy pathText.c
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67 lines (58 loc) · 2.24 KB
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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017 Radomir Dopieralski
*
* 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 "Text.h"
#include "__init__.h"
// Get the color of the pixel on the text.
uint16_t get_text_pixel(text_obj_t *text, uint16_t x, uint16_t y) {
// Shift by the text's position offset.
x -= text->x;
y -= text->y;
// Bounds check.
if ((x < 0) || (x >= text->width << 3) ||
(y < 0) || (y >= text->height << 3)) {
return TRANSPARENT;
}
// Get the tile from the grid location or from sprite frame.
uint8_t tx = x >> 3;
uint8_t ty = y >> 3;
uint8_t c = text->chars[ty * text->width + tx];
uint8_t color_offset = 0;
if (c & 0x80) {
color_offset = 4;
}
c &= 0x7f;
if (!c) {
return TRANSPARENT;
}
// Get the position within the char.
x &= 0x07;
y &= 0x07;
// Get the value of the pixel.
uint8_t pixel = text->font[(c << 4) + (y << 1) + (x >> 2)];
pixel = ((pixel >> ((x & 0x03) << 1)) & 0x03) + color_offset;
// Convert to 16-bit color using the palette.
return text->palette[pixel << 1] | text->palette[(pixel << 1) + 1] << 8;
}