ELEC2645 (2018/19) / Mbed 2 deprecated el17ebs

Dependencies:   mbed FATFileSystem

N5110/Bitmap.cpp@17:98127ac75195, 2019-05-09 (annotated)

Committer:
ellisbhastroud
Date:
Thu May 09 12:01:42 2019 +0000
Revision:
17:98127ac75195
Parent:
0:c6ceddb241df 
Final Submission. I have read and agreed with Statement of Academic Integrity.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ellisbhastroud 0:c6ceddb241df 1 #include "Bitmap.h"
ellisbhastroud 0:c6ceddb241df 2
ellisbhastroud 0:c6ceddb241df 3 #include <iostream>
ellisbhastroud 0:c6ceddb241df 4
ellisbhastroud 0:c6ceddb241df 5 #include "N5110.h"
ellisbhastroud 0:c6ceddb241df 6
ellisbhastroud 0:c6ceddb241df 7 Bitmap::Bitmap(int const *contents,
ellisbhastroud 0:c6ceddb241df 8 unsigned int const height,
ellisbhastroud 0:c6ceddb241df 9 unsigned int const width)
ellisbhastroud 0:c6ceddb241df 10 :
ellisbhastroud 0:c6ceddb241df 11 _contents(std::vector<int>(height*width)),
ellisbhastroud 0:c6ceddb241df 12 _height(height),
ellisbhastroud 0:c6ceddb241df 13 _width(width)
ellisbhastroud 0:c6ceddb241df 14 {
ellisbhastroud 0:c6ceddb241df 15 // Perform a quick sanity check of the dimensions
ellisbhastroud 0:c6ceddb241df 16 if (_contents.size() != height * width) {
ellisbhastroud 0:c6ceddb241df 17 std::cerr << "Contents of bitmap has size " << _contents.size()
ellisbhastroud 0:c6ceddb241df 18 << " pixels, but its dimensions were specified as "
ellisbhastroud 0:c6ceddb241df 19 << width << " * " << height << " = " << width * height << std::endl;
ellisbhastroud 0:c6ceddb241df 20 }
ellisbhastroud 0:c6ceddb241df 21
ellisbhastroud 0:c6ceddb241df 22 for(unsigned int i = 0; i < height*width; ++i) _contents[i] = contents[i];
ellisbhastroud 0:c6ceddb241df 23 }
ellisbhastroud 0:c6ceddb241df 24
ellisbhastroud 0:c6ceddb241df 25 /**
ellisbhastroud 0:c6ceddb241df 26 * @returns the value of the pixel at the given position
ellisbhastroud 0:c6ceddb241df 27 */
ellisbhastroud 0:c6ceddb241df 28 int Bitmap::get_pixel(unsigned int const row,
ellisbhastroud 0:c6ceddb241df 29 unsigned int const column) const
ellisbhastroud 0:c6ceddb241df 30 {
ellisbhastroud 0:c6ceddb241df 31 // First check that row and column indices are within bounds
ellisbhastroud 0:c6ceddb241df 32 if(column >= _width || row >= _height)
ellisbhastroud 0:c6ceddb241df 33 {
ellisbhastroud 0:c6ceddb241df 34 std::cerr << "The requested pixel with index " << row << "," << column
ellisbhastroud 0:c6ceddb241df 35 << "is outside the bitmap dimensions: " << _width << ","
ellisbhastroud 0:c6ceddb241df 36 << _height << std::endl;
ellisbhastroud 0:c6ceddb241df 37 }
ellisbhastroud 0:c6ceddb241df 38
ellisbhastroud 0:c6ceddb241df 39 // Now return the pixel value, using row-major indexing
ellisbhastroud 0:c6ceddb241df 40 return _contents[row * _width + column];
ellisbhastroud 0:c6ceddb241df 41 }
ellisbhastroud 0:c6ceddb241df 42
ellisbhastroud 0:c6ceddb241df 43 /**
ellisbhastroud 0:c6ceddb241df 44 * @brief Prints the contents of the bitmap to the terminal
ellisbhastroud 0:c6ceddb241df 45 */
ellisbhastroud 0:c6ceddb241df 46 void Bitmap::print() const
ellisbhastroud 0:c6ceddb241df 47 {
ellisbhastroud 0:c6ceddb241df 48 for (unsigned int row = 0; row < _height; ++row)
ellisbhastroud 0:c6ceddb241df 49 {
ellisbhastroud 0:c6ceddb241df 50 // Print each element of the row
ellisbhastroud 0:c6ceddb241df 51 for (unsigned int column = 0; column < _width; ++column)
ellisbhastroud 0:c6ceddb241df 52 {
ellisbhastroud 0:c6ceddb241df 53 int pixel = get_pixel(row, column);
ellisbhastroud 0:c6ceddb241df 54 std::cout << pixel;
ellisbhastroud 0:c6ceddb241df 55 }
ellisbhastroud 0:c6ceddb241df 56
ellisbhastroud 0:c6ceddb241df 57 // And then terminate with a new-line character
ellisbhastroud 0:c6ceddb241df 58 std::cout << std::endl;
ellisbhastroud 0:c6ceddb241df 59 }
ellisbhastroud 0:c6ceddb241df 60 }
ellisbhastroud 0:c6ceddb241df 61
ellisbhastroud 0:c6ceddb241df 62 /**
ellisbhastroud 0:c6ceddb241df 63 * @brief Renders the contents of the bitmap onto an N5110 screen
ellisbhastroud 0:c6ceddb241df 64 *
ellisbhastroud 0:c6ceddb241df 65 * @param[in] lcd The screen to use for rendering
ellisbhastroud 0:c6ceddb241df 66 * @param[in] x0 The horizontal position in pixels at which to render the bitmap
ellisbhastroud 0:c6ceddb241df 67 * @param[in] y0 The vertical position in pixels at which to render the bitmap
ellisbhastroud 0:c6ceddb241df 68 *
ellisbhastroud 0:c6ceddb241df 69 * @details Note that x0, y0 gives the location of the top-left of the bitmap on
ellisbhastroud 0:c6ceddb241df 70 * the screen.
ellisbhastroud 0:c6ceddb241df 71 * This function only updates the buffer on the screen. You still need
ellisbhastroud 0:c6ceddb241df 72 * to refresh the screen in order to actually see the bitmap.
ellisbhastroud 0:c6ceddb241df 73 */
ellisbhastroud 0:c6ceddb241df 74 void Bitmap::render(N5110 &lcd,
ellisbhastroud 0:c6ceddb241df 75 unsigned int const x0,
ellisbhastroud 0:c6ceddb241df 76 unsigned int const y0) const
ellisbhastroud 0:c6ceddb241df 77 {
ellisbhastroud 0:c6ceddb241df 78 // Loop through each row of the bitmap image
ellisbhastroud 0:c6ceddb241df 79 for (unsigned int bitmap_row = 0; bitmap_row < _height; ++bitmap_row)
ellisbhastroud 0:c6ceddb241df 80 {
ellisbhastroud 0:c6ceddb241df 81 // Row index on the screen for rendering the row of pixels
ellisbhastroud 0:c6ceddb241df 82 unsigned int screen_row = y0 + bitmap_row;
ellisbhastroud 0:c6ceddb241df 83
ellisbhastroud 0:c6ceddb241df 84 // Render each pixel in the row
ellisbhastroud 0:c6ceddb241df 85 for (unsigned int bitmap_col = 0; bitmap_col < _width; ++bitmap_col)
ellisbhastroud 0:c6ceddb241df 86 {
ellisbhastroud 0:c6ceddb241df 87 // Column index on the screen for rendering this pixel
ellisbhastroud 0:c6ceddb241df 88 int screen_col = x0 + bitmap_col;
ellisbhastroud 0:c6ceddb241df 89
ellisbhastroud 0:c6ceddb241df 90 // Find the required value of the pixel at the given location within
ellisbhastroud 0:c6ceddb241df 91 // the bitmap data and then write it to the LCD screen
ellisbhastroud 0:c6ceddb241df 92 int pixel = get_pixel(bitmap_row, bitmap_col);
ellisbhastroud 0:c6ceddb241df 93 lcd.setPixel(screen_col, screen_row, pixel);
ellisbhastroud 0:c6ceddb241df 94 }
ellisbhastroud 0:c6ceddb241df 95 }
ellisbhastroud 0:c6ceddb241df 96 }