343 lines
8.8 KiB
C++
343 lines
8.8 KiB
C++
/**
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* @filename : epdpaint.cpp
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* @brief : Paint tools
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* @author : Yehui from Waveshare
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*
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* Copyright (C) Waveshare September 9 2017
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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 documnetation 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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* furished 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 OR 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 <avr/pgmspace.h>
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#include "epdpaint.h"
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Paint::Paint(unsigned char* image, int width, int height) {
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this->rotate = ROTATE_0;
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this->image = image;
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/* 1 byte = 8 pixels, so the width should be the multiple of 8 */
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this->width = width % 8 ? width + 8 - (width % 8) : width;
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this->height = height;
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}
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Paint::~Paint() {
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}
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/**
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* @brief: clear the image
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*/
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void Paint::Clear(int colored) {
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for (int x = 0; x < this->width; x++) {
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for (int y = 0; y < this->height; y++) {
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DrawAbsolutePixel(x, y, colored);
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}
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}
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}
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/**
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* @brief: this draws a pixel by absolute coordinates.
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* this function won't be affected by the rotate parameter.
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*/
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void Paint::DrawAbsolutePixel(int x, int y, int colored) {
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if (x < 0 || x >= this->width || y < 0 || y >= this->height) {
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return;
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}
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if (IF_INVERT_COLOR) {
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if (colored) {
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image[(x + y * this->width) / 8] |= 0x80 >> (x % 8);
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} else {
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image[(x + y * this->width) / 8] &= ~(0x80 >> (x % 8));
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}
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} else {
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if (colored) {
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image[(x + y * this->width) / 8] &= ~(0x80 >> (x % 8));
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} else {
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image[(x + y * this->width) / 8] |= 0x80 >> (x % 8);
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}
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}
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}
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/**
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* @brief: Getters and Setters
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*/
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unsigned char* Paint::GetImage(void) {
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return this->image;
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}
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int Paint::GetWidth(void) {
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return this->width;
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}
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void Paint::SetWidth(int width) {
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this->width = width % 8 ? width + 8 - (width % 8) : width;
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}
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int Paint::GetHeight(void) {
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return this->height;
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}
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void Paint::SetHeight(int height) {
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this->height = height;
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}
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int Paint::GetRotate(void) {
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return this->rotate;
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}
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void Paint::SetRotate(int rotate){
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this->rotate = rotate;
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}
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/**
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* @brief: this draws a pixel by the coordinates
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*/
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void Paint::DrawPixel(int x, int y, int colored) {
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int point_temp;
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if (this->rotate == ROTATE_0) {
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if(x < 0 || x >= this->width || y < 0 || y >= this->height) {
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return;
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}
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DrawAbsolutePixel(x, y, colored);
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} else if (this->rotate == ROTATE_90) {
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if(x < 0 || x >= this->height || y < 0 || y >= this->width) {
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return;
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}
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point_temp = x;
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x = this->width - y;
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y = point_temp;
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DrawAbsolutePixel(x, y, colored);
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} else if (this->rotate == ROTATE_180) {
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if(x < 0 || x >= this->width || y < 0 || y >= this->height) {
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return;
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}
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x = this->width - x;
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y = this->height - y;
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DrawAbsolutePixel(x, y, colored);
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} else if (this->rotate == ROTATE_270) {
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if(x < 0 || x >= this->height || y < 0 || y >= this->width) {
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return;
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}
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point_temp = x;
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x = y;
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y = this->height - point_temp;
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DrawAbsolutePixel(x, y, colored);
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}
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}
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/**
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* @brief: this draws a charactor on the frame buffer but not refresh
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*/
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void Paint::DrawCharAt(int x, int y, char ascii_char, sFONT* font, int colored) {
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int i, j;
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unsigned int char_offset = (ascii_char - ' ') * font->Height * (font->Width / 8 + (font->Width % 8 ? 1 : 0));
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const unsigned char* ptr = &font->table[char_offset];
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for (j = 0; j < font->Height; j++) {
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for (i = 0; i < font->Width; i++) {
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if (pgm_read_byte(ptr) & (0x80 >> (i % 8))) {
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DrawPixel(x + i, y + j, colored);
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}
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if (i % 8 == 7) {
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ptr++;
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}
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}
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if (font->Width % 8 != 0) {
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ptr++;
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}
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}
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}
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/**
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* @brief: this displays a string on the frame buffer but not refresh
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*/
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void Paint::DrawStringAt(int x, int y, const char* text, sFONT* font, int colored) {
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const char* p_text = text;
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unsigned int counter = 0;
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int refcolumn = x;
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/* Send the string character by character on EPD */
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while (*p_text != 0) {
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/* Display one character on EPD */
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DrawCharAt(refcolumn, y, *p_text, font, colored);
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/* Decrement the column position by 16 */
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refcolumn += font->Width;
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/* Point on the next character */
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p_text++;
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counter++;
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}
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}
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/**
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* @brief: this draws a line on the frame buffer
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*/
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void Paint::DrawLine(int x0, int y0, int x1, int y1, int colored) {
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/* Bresenham algorithm */
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int dx = x1 - x0 >= 0 ? x1 - x0 : x0 - x1;
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int sx = x0 < x1 ? 1 : -1;
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int dy = y1 - y0 <= 0 ? y1 - y0 : y0 - y1;
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int sy = y0 < y1 ? 1 : -1;
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int err = dx + dy;
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while((x0 != x1) && (y0 != y1)) {
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DrawPixel(x0, y0 , colored);
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if (2 * err >= dy) {
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err += dy;
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x0 += sx;
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}
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if (2 * err <= dx) {
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err += dx;
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y0 += sy;
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}
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}
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}
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/**
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* @brief: this draws a horizontal line on the frame buffer
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*/
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void Paint::DrawHorizontalLine(int x, int y, int line_width, int colored) {
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int i;
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for (i = x; i < x + line_width; i++) {
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DrawPixel(i, y, colored);
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}
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}
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/**
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* @brief: this draws a vertical line on the frame buffer
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*/
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void Paint::DrawVerticalLine(int x, int y, int line_height, int colored) {
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int i;
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for (i = y; i < y + line_height; i++) {
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DrawPixel(x, i, colored);
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}
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}
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/**
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* @brief: this draws a rectangle
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*/
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void Paint::DrawRectangle(int x0, int y0, int x1, int y1, int colored) {
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int min_x, min_y, max_x, max_y;
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min_x = x1 > x0 ? x0 : x1;
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max_x = x1 > x0 ? x1 : x0;
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min_y = y1 > y0 ? y0 : y1;
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max_y = y1 > y0 ? y1 : y0;
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DrawHorizontalLine(min_x, min_y, max_x - min_x + 1, colored);
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DrawHorizontalLine(min_x, max_y, max_x - min_x + 1, colored);
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DrawVerticalLine(min_x, min_y, max_y - min_y + 1, colored);
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DrawVerticalLine(max_x, min_y, max_y - min_y + 1, colored);
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}
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/**
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* @brief: this draws a filled rectangle
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*/
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void Paint::DrawFilledRectangle(int x0, int y0, int x1, int y1, int colored) {
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int min_x, min_y, max_x, max_y;
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int i;
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min_x = x1 > x0 ? x0 : x1;
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max_x = x1 > x0 ? x1 : x0;
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min_y = y1 > y0 ? y0 : y1;
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max_y = y1 > y0 ? y1 : y0;
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for (i = min_x; i <= max_x; i++) {
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DrawVerticalLine(i, min_y, max_y - min_y + 1, colored);
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}
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}
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/**
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* @brief: this draws a circle
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*/
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void Paint::DrawCircle(int x, int y, int radius, int colored) {
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/* Bresenham algorithm */
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int x_pos = -radius;
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int y_pos = 0;
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int err = 2 - 2 * radius;
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int e2;
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do {
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DrawPixel(x - x_pos, y + y_pos, colored);
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DrawPixel(x + x_pos, y + y_pos, colored);
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DrawPixel(x + x_pos, y - y_pos, colored);
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DrawPixel(x - x_pos, y - y_pos, colored);
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e2 = err;
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if (e2 <= y_pos) {
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err += ++y_pos * 2 + 1;
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if(-x_pos == y_pos && e2 <= x_pos) {
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e2 = 0;
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}
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}
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if (e2 > x_pos) {
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err += ++x_pos * 2 + 1;
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}
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} while (x_pos <= 0);
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}
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/**
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* @brief: this draws a filled circle
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*/
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void Paint::DrawFilledCircle(int x, int y, int radius, int colored) {
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/* Bresenham algorithm */
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int x_pos = -radius;
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int y_pos = 0;
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int err = 2 - 2 * radius;
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int e2;
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do {
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DrawPixel(x - x_pos, y + y_pos, colored);
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DrawPixel(x + x_pos, y + y_pos, colored);
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DrawPixel(x + x_pos, y - y_pos, colored);
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DrawPixel(x - x_pos, y - y_pos, colored);
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DrawHorizontalLine(x + x_pos, y + y_pos, 2 * (-x_pos) + 1, colored);
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DrawHorizontalLine(x + x_pos, y - y_pos, 2 * (-x_pos) + 1, colored);
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e2 = err;
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if (e2 <= y_pos) {
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err += ++y_pos * 2 + 1;
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if(-x_pos == y_pos && e2 <= x_pos) {
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e2 = 0;
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}
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}
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if(e2 > x_pos) {
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err += ++x_pos * 2 + 1;
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}
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} while(x_pos <= 0);
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}
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/* END OF FILE */
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