(DA) Internet of Things and Smart Electronics- ELE3006M2122 / Mbed 2 deprecated IOTProject_LC1

legionella detector

Dependencies:   mbed

N5110/Bitmap.cpp@6:4e8b0d2bbe85, 23 months ago (annotated)

Committer:
lewiscameron
Date:
Wed Aug 24 19:43:57 2022 +0000
Revision:
6:4e8b0d2bbe85
Parent:
0:089b4c4f2b6f 
end

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lewiscameron 0:089b4c4f2b6f 1 #include "Bitmap.h"
lewiscameron 0:089b4c4f2b6f 2
lewiscameron 0:089b4c4f2b6f 3 #include <iostream>
lewiscameron 0:089b4c4f2b6f 4
lewiscameron 0:089b4c4f2b6f 5 #include "N5110.h"
lewiscameron 0:089b4c4f2b6f 6
lewiscameron 0:089b4c4f2b6f 7 Bitmap::Bitmap(int const *contents,
lewiscameron 0:089b4c4f2b6f 8 unsigned int const height,
lewiscameron 0:089b4c4f2b6f 9 unsigned int const width)
lewiscameron 0:089b4c4f2b6f 10 :
lewiscameron 0:089b4c4f2b6f 11 _contents(std::vector<int>(height*width)),
lewiscameron 0:089b4c4f2b6f 12 _height(height),
lewiscameron 0:089b4c4f2b6f 13 _width(width)
lewiscameron 0:089b4c4f2b6f 14 {
lewiscameron 0:089b4c4f2b6f 15 // Perform a quick sanity check of the dimensions
lewiscameron 0:089b4c4f2b6f 16 if (_contents.size() != height * width) {
lewiscameron 0:089b4c4f2b6f 17 std::cerr << "Contents of bitmap has size " << _contents.size()
lewiscameron 0:089b4c4f2b6f 18 << " pixels, but its dimensions were specified as "
lewiscameron 0:089b4c4f2b6f 19 << width << " * " << height << " = " << width * height << std::endl;
lewiscameron 0:089b4c4f2b6f 20 }
lewiscameron 0:089b4c4f2b6f 21
lewiscameron 0:089b4c4f2b6f 22 for(unsigned int i = 0; i < height*width; ++i) _contents[i] = contents[i];
lewiscameron 0:089b4c4f2b6f 23 }
lewiscameron 0:089b4c4f2b6f 24
lewiscameron 0:089b4c4f2b6f 25 /**
lewiscameron 0:089b4c4f2b6f 26 * @returns the value of the pixel at the given position
lewiscameron 0:089b4c4f2b6f 27 */
lewiscameron 0:089b4c4f2b6f 28 int Bitmap::get_pixel(unsigned int const row,
lewiscameron 0:089b4c4f2b6f 29 unsigned int const column) const
lewiscameron 0:089b4c4f2b6f 30 {
lewiscameron 0:089b4c4f2b6f 31 // First check that row and column indices are within bounds
lewiscameron 0:089b4c4f2b6f 32 if(column >= _width || row >= _height)
lewiscameron 0:089b4c4f2b6f 33 {
lewiscameron 0:089b4c4f2b6f 34 std::cerr << "The requested pixel with index " << row << "," << column
lewiscameron 0:089b4c4f2b6f 35 << "is outside the bitmap dimensions: " << _width << ","
lewiscameron 0:089b4c4f2b6f 36 << _height << std::endl;
lewiscameron 0:089b4c4f2b6f 37 }
lewiscameron 0:089b4c4f2b6f 38
lewiscameron 0:089b4c4f2b6f 39 // Now return the pixel value, using row-major indexing
lewiscameron 0:089b4c4f2b6f 40 return _contents[row * _width + column];
lewiscameron 0:089b4c4f2b6f 41 }
lewiscameron 0:089b4c4f2b6f 42
lewiscameron 0:089b4c4f2b6f 43 /**
lewiscameron 0:089b4c4f2b6f 44 * @brief Prints the contents of the bitmap to the terminal
lewiscameron 0:089b4c4f2b6f 45 */
lewiscameron 0:089b4c4f2b6f 46 void Bitmap::print() const
lewiscameron 0:089b4c4f2b6f 47 {
lewiscameron 0:089b4c4f2b6f 48 for (unsigned int row = 0; row < _height; ++row)
lewiscameron 0:089b4c4f2b6f 49 {
lewiscameron 0:089b4c4f2b6f 50 // Print each element of the row
lewiscameron 0:089b4c4f2b6f 51 for (unsigned int column = 0; column < _width; ++column)
lewiscameron 0:089b4c4f2b6f 52 {
lewiscameron 0:089b4c4f2b6f 53 int pixel = get_pixel(row, column);
lewiscameron 0:089b4c4f2b6f 54 std::cout << pixel;
lewiscameron 0:089b4c4f2b6f 55 }
lewiscameron 0:089b4c4f2b6f 56
lewiscameron 0:089b4c4f2b6f 57 // And then terminate with a new-line character
lewiscameron 0:089b4c4f2b6f 58 std::cout << std::endl;
lewiscameron 0:089b4c4f2b6f 59 }
lewiscameron 0:089b4c4f2b6f 60 }
lewiscameron 0:089b4c4f2b6f 61
lewiscameron 0:089b4c4f2b6f 62 /**
lewiscameron 0:089b4c4f2b6f 63 * @brief Renders the contents of the bitmap onto an N5110 screen
lewiscameron 0:089b4c4f2b6f 64 *
lewiscameron 0:089b4c4f2b6f 65 * @param[in] lcd The screen to use for rendering
lewiscameron 0:089b4c4f2b6f 66 * @param[in] x0 The horizontal position in pixels at which to render the bitmap
lewiscameron 0:089b4c4f2b6f 67 * @param[in] y0 The vertical position in pixels at which to render the bitmap
lewiscameron 0:089b4c4f2b6f 68 *
lewiscameron 0:089b4c4f2b6f 69 * @details Note that x0, y0 gives the location of the top-left of the bitmap on
lewiscameron 0:089b4c4f2b6f 70 * the screen.
lewiscameron 0:089b4c4f2b6f 71 * This function only updates the buffer on the screen. You still need
lewiscameron 0:089b4c4f2b6f 72 * to refresh the screen in order to actually see the bitmap.
lewiscameron 0:089b4c4f2b6f 73 */
lewiscameron 0:089b4c4f2b6f 74 void Bitmap::render(N5110 &lcd,
lewiscameron 0:089b4c4f2b6f 75 unsigned int const x0,
lewiscameron 0:089b4c4f2b6f 76 unsigned int const y0) const
lewiscameron 0:089b4c4f2b6f 77 {
lewiscameron 0:089b4c4f2b6f 78 // Loop through each row of the bitmap image
lewiscameron 0:089b4c4f2b6f 79 for (unsigned int bitmap_row = 0; bitmap_row < _height; ++bitmap_row)
lewiscameron 0:089b4c4f2b6f 80 {
lewiscameron 0:089b4c4f2b6f 81 // Row index on the screen for rendering the row of pixels
lewiscameron 0:089b4c4f2b6f 82 unsigned int screen_row = y0 + bitmap_row;
lewiscameron 0:089b4c4f2b6f 83
lewiscameron 0:089b4c4f2b6f 84 // Render each pixel in the row
lewiscameron 0:089b4c4f2b6f 85 for (unsigned int bitmap_col = 0; bitmap_col < _width; ++bitmap_col)
lewiscameron 0:089b4c4f2b6f 86 {
lewiscameron 0:089b4c4f2b6f 87 // Column index on the screen for rendering this pixel
lewiscameron 0:089b4c4f2b6f 88 int screen_col = x0 + bitmap_col;
lewiscameron 0:089b4c4f2b6f 89
lewiscameron 0:089b4c4f2b6f 90 // Find the required value of the pixel at the given location within
lewiscameron 0:089b4c4f2b6f 91 // the bitmap data and then write it to the LCD screen
lewiscameron 0:089b4c4f2b6f 92 int pixel = get_pixel(bitmap_row, bitmap_col);
lewiscameron 0:089b4c4f2b6f 93 lcd.setPixel(screen_col, screen_row, pixel);
lewiscameron 0:089b4c4f2b6f 94 }
lewiscameron 0:089b4c4f2b6f 95 }
lewiscameron 0:089b4c4f2b6f 96 }