Library for Waveshare 2.7" tri-colour e-Paper display.
epdpaint.cpp
- Committer:
- mdroberts1243
- Date:
- 2019-12-06
- Revision:
- 0:9e6a8e3cd8de
File content as of revision 0:9e6a8e3cd8de:
/** * @filename : epdpaint.cpp * @brief : Paint tools * @author : Yehui from Waveshare * * Copyright (C) Waveshare September 9 2017 * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documnetation 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 * furished 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 OR 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 <avr/pgmspace.h> by JH1PJL for mbed-os5 Apr.28,2019 #include "epdpaint.h" Paint::Paint(unsigned char* image, int width, int height) { this->rotate = ROTATE_0; this->image = image; /* 1 byte = 8 pixels, so the width should be the multiple of 8 */ this->width = width % 8 ? width + 8 - (width % 8) : width; this->height = height; } Paint::~Paint() { } /** * @brief: clear the image */ void Paint::Clear(int colored) { for (int x = 0; x < this->width; x++) { for (int y = 0; y < this->height; y++) { DrawAbsolutePixel(x, y, colored); } } } /** * @brief: this draws a pixel by absolute coordinates. * this function won't be affected by the rotate parameter. */ void Paint::DrawAbsolutePixel(int x, int y, int colored) { if (x < 0 || x >= this->width || y < 0 || y >= this->height) { return; } if (IF_INVERT_COLOR) { if (colored) { image[(x + y * this->width) / 8] |= 0x80 >> (x % 8); } else { image[(x + y * this->width) / 8] &= ~(0x80 >> (x % 8)); } } else { if (colored) { image[(x + y * this->width) / 8] &= ~(0x80 >> (x % 8)); } else { image[(x + y * this->width) / 8] |= 0x80 >> (x % 8); } } } /** * @brief: Getters and Setters */ unsigned char* Paint::GetImage(void) { return this->image; } int Paint::GetWidth(void) { return this->width; } void Paint::SetWidth(int width) { this->width = width % 8 ? width + 8 - (width % 8) : width; } int Paint::GetHeight(void) { return this->height; } void Paint::SetHeight(int height) { this->height = height; } int Paint::GetRotate(void) { return this->rotate; } void Paint::SetRotate(int rotate) { this->rotate = rotate; } /** * @brief: this draws a pixel by the coordinates */ void Paint::DrawPixel(int x, int y, int colored) { int point_temp; if (this->rotate == ROTATE_0) { if(x < 0 || x >= this->width || y < 0 || y >= this->height) { return; } DrawAbsolutePixel(x, y, colored); } else if (this->rotate == ROTATE_90) { if(x < 0 || x >= this->height || y < 0 || y >= this->width) { return; } point_temp = x; x = this->width - y; y = point_temp; DrawAbsolutePixel(x, y, colored); } else if (this->rotate == ROTATE_180) { if(x < 0 || x >= this->width || y < 0 || y >= this->height) { return; } x = this->width - x; y = this->height - y; DrawAbsolutePixel(x, y, colored); } else if (this->rotate == ROTATE_270) { if(x < 0 || x >= this->height || y < 0 || y >= this->width) { return; } point_temp = x; x = y; y = this->height - point_temp; DrawAbsolutePixel(x, y, colored); } } /** * @brief: this draws a charactor on the frame buffer but not refresh */ void Paint::DrawCharAt(int x, int y, char ascii_char, sFONT* font, int colored) { int i, j; unsigned int char_offset = (ascii_char - ' ') * font->Height * (font->Width / 8 + (font->Width % 8 ? 1 : 0)); const unsigned char* ptr = &font->table[char_offset]; for (j = 0; j < font->Height; j++) { for (i = 0; i < font->Width; i++) { if (*ptr & (0x80 >> (i % 8))) { DrawPixel(x + i, y + j, colored); } if (i % 8 == 7) { ptr++; } } if (font->Width % 8 != 0) { ptr++; } } } /** * @brief: this displays a string on the frame buffer but not refresh */ void Paint::DrawStringAt(int x, int y, const char* text, sFONT* font, int colored) { const char* p_text = text; unsigned int counter = 0; int refcolumn = x; /* Send the string character by character on EPD */ while (*p_text != 0) { /* Display one character on EPD */ DrawCharAt(refcolumn, y, *p_text, font, colored); /* Decrement the column position by 16 */ refcolumn += font->Width; /* Point on the next character */ p_text++; counter++; } } /** * @brief: this draws a line on the frame buffer */ void Paint::DrawLine(int x0, int y0, int x1, int y1, int colored) { /* Bresenham algorithm */ int dx = x1 - x0 >= 0 ? x1 - x0 : x0 - x1; int sx = x0 < x1 ? 1 : -1; int dy = y1 - y0 <= 0 ? y1 - y0 : y0 - y1; int sy = y0 < y1 ? 1 : -1; int err = dx + dy; while((x0 != x1) && (y0 != y1)) { DrawPixel(x0, y0, colored); if (2 * err >= dy) { err += dy; x0 += sx; } if (2 * err <= dx) { err += dx; y0 += sy; } } } /** * @brief: this draws a horizontal line on the frame buffer */ void Paint::DrawHorizontalLine(int x, int y, int line_width, int colored) { int i; for (i = x; i < x + line_width; i++) { DrawPixel(i, y, colored); } } /** * @brief: this draws a vertical line on the frame buffer */ void Paint::DrawVerticalLine(int x, int y, int line_height, int colored) { int i; for (i = y; i < y + line_height; i++) { DrawPixel(x, i, colored); } } /** * @brief: this draws a rectangle */ void Paint::DrawRectangle(int x0, int y0, int x1, int y1, int colored) { int min_x, min_y, max_x, max_y; min_x = x1 > x0 ? x0 : x1; max_x = x1 > x0 ? x1 : x0; min_y = y1 > y0 ? y0 : y1; max_y = y1 > y0 ? y1 : y0; DrawHorizontalLine(min_x, min_y, max_x - min_x + 1, colored); DrawHorizontalLine(min_x, max_y, max_x - min_x + 1, colored); DrawVerticalLine(min_x, min_y, max_y - min_y + 1, colored); DrawVerticalLine(max_x, min_y, max_y - min_y + 1, colored); } /** * @brief: this draws a filled rectangle */ void Paint::DrawFilledRectangle(int x0, int y0, int x1, int y1, int colored) { int min_x, min_y, max_x, max_y; int i; min_x = x1 > x0 ? x0 : x1; max_x = x1 > x0 ? x1 : x0; min_y = y1 > y0 ? y0 : y1; max_y = y1 > y0 ? y1 : y0; for (i = min_x; i <= max_x; i++) { DrawVerticalLine(i, min_y, max_y - min_y + 1, colored); } } /** * @brief: this draws a circle */ void Paint::DrawCircle(int x, int y, int radius, int colored) { /* Bresenham algorithm */ int x_pos = -radius; int y_pos = 0; int err = 2 - 2 * radius; int e2; do { DrawPixel(x - x_pos, y + y_pos, colored); DrawPixel(x + x_pos, y + y_pos, colored); DrawPixel(x + x_pos, y - y_pos, colored); DrawPixel(x - x_pos, y - y_pos, colored); e2 = err; if (e2 <= y_pos) { err += ++y_pos * 2 + 1; if(-x_pos == y_pos && e2 <= x_pos) { e2 = 0; } } if (e2 > x_pos) { err += ++x_pos * 2 + 1; } } while (x_pos <= 0); } /** * @brief: this draws a filled circle */ void Paint::DrawFilledCircle(int x, int y, int radius, int colored) { /* Bresenham algorithm */ int x_pos = -radius; int y_pos = 0; int err = 2 - 2 * radius; int e2; do { DrawPixel(x - x_pos, y + y_pos, colored); DrawPixel(x + x_pos, y + y_pos, colored); DrawPixel(x + x_pos, y - y_pos, colored); DrawPixel(x - x_pos, y - y_pos, colored); DrawHorizontalLine(x + x_pos, y + y_pos, 2 * (-x_pos) + 1, colored); DrawHorizontalLine(x + x_pos, y - y_pos, 2 * (-x_pos) + 1, colored); e2 = err; if (e2 <= y_pos) { err += ++y_pos * 2 + 1; if(-x_pos == y_pos && e2 <= x_pos) { e2 = 0; } } if(e2 > x_pos) { err += ++x_pos * 2 + 1; } } while(x_pos <= 0); } /* END OF FILE */