Diff: epdpaint.cpp

Revision:

0:825022100d0f

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/epdpaint.cpp	Tue Apr 30 02:08:41 2019 +0000
@@ -0,0 +1,363 @@
+/**
+ *  @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 */
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