ELEC2645 (2019/20) / Mbed 2 deprecated ELEC2645_Project_el17oc

Owen Cavender 201159294

Dependencies:   mbed

Gamepad2/Bitmap.cpp@2:ffbfd3f53ee2, 2020-05-30 (annotated)

Committer:
el17oc
Date:
Sat May 30 06:12:09 2020 +0000
Revision:
2:ffbfd3f53ee2
Parent:
1:897160a1a3ae 
Final Submission. I have read and agreed with Statement of Academic Integrity

Who changed what in which revision?

UserRevisionLine numberNew contents of line
el17oc 1:897160a1a3ae 1 #include "Bitmap.h"
el17oc 1:897160a1a3ae 2
el17oc 1:897160a1a3ae 3 #include <iostream>
el17oc 1:897160a1a3ae 4
el17oc 1:897160a1a3ae 5 #include "N5110.h"
el17oc 1:897160a1a3ae 6
el17oc 1:897160a1a3ae 7 Bitmap::Bitmap(int const *contents,
el17oc 1:897160a1a3ae 8 unsigned int const height,
el17oc 1:897160a1a3ae 9 unsigned int const width)
el17oc 1:897160a1a3ae 10 :
el17oc 1:897160a1a3ae 11 _contents(std::vector<int>(height*width)),
el17oc 1:897160a1a3ae 12 _height(height),
el17oc 1:897160a1a3ae 13 _width(width)
el17oc 1:897160a1a3ae 14 {
el17oc 1:897160a1a3ae 15 // Perform a quick sanity check of the dimensions
el17oc 1:897160a1a3ae 16 if (_contents.size() != height * width) {
el17oc 1:897160a1a3ae 17 std::cerr << "Contents of bitmap has size " << _contents.size()
el17oc 1:897160a1a3ae 18 << " pixels, but its dimensions were specified as "
el17oc 1:897160a1a3ae 19 << width << " * " << height << " = " << width * height << std::endl;
el17oc 1:897160a1a3ae 20 }
el17oc 1:897160a1a3ae 21
el17oc 1:897160a1a3ae 22 for(unsigned int i = 0; i < height*width; ++i) _contents[i] = contents[i];
el17oc 1:897160a1a3ae 23 }
el17oc 1:897160a1a3ae 24
el17oc 1:897160a1a3ae 25 /**
el17oc 1:897160a1a3ae 26 * @returns the value of the pixel at the given position
el17oc 1:897160a1a3ae 27 */
el17oc 1:897160a1a3ae 28 int Bitmap::get_pixel(unsigned int const row,
el17oc 1:897160a1a3ae 29 unsigned int const column) const
el17oc 1:897160a1a3ae 30 {
el17oc 1:897160a1a3ae 31 // First check that row and column indices are within bounds
el17oc 1:897160a1a3ae 32 if(column >= _width || row >= _height)
el17oc 1:897160a1a3ae 33 {
el17oc 1:897160a1a3ae 34 std::cerr << "The requested pixel with index " << row << "," << column
el17oc 1:897160a1a3ae 35 << "is outside the bitmap dimensions: " << _width << ","
el17oc 1:897160a1a3ae 36 << _height << std::endl;
el17oc 1:897160a1a3ae 37 }
el17oc 1:897160a1a3ae 38
el17oc 1:897160a1a3ae 39 // Now return the pixel value, using row-major indexing
el17oc 1:897160a1a3ae 40 return _contents[row * _width + column];
el17oc 1:897160a1a3ae 41 }
el17oc 1:897160a1a3ae 42
el17oc 1:897160a1a3ae 43 /**
el17oc 1:897160a1a3ae 44 * @brief Prints the contents of the bitmap to the terminal
el17oc 1:897160a1a3ae 45 */
el17oc 1:897160a1a3ae 46 void Bitmap::print() const
el17oc 1:897160a1a3ae 47 {
el17oc 1:897160a1a3ae 48 for (unsigned int row = 0; row < _height; ++row)
el17oc 1:897160a1a3ae 49 {
el17oc 1:897160a1a3ae 50 // Print each element of the row
el17oc 1:897160a1a3ae 51 for (unsigned int column = 0; column < _width; ++column)
el17oc 1:897160a1a3ae 52 {
el17oc 1:897160a1a3ae 53 int pixel = get_pixel(row, column);
el17oc 1:897160a1a3ae 54 std::cout << pixel;
el17oc 1:897160a1a3ae 55 }
el17oc 1:897160a1a3ae 56
el17oc 1:897160a1a3ae 57 // And then terminate with a new-line character
el17oc 1:897160a1a3ae 58 std::cout << std::endl;
el17oc 1:897160a1a3ae 59 }
el17oc 1:897160a1a3ae 60 }
el17oc 1:897160a1a3ae 61
el17oc 1:897160a1a3ae 62 /**
el17oc 1:897160a1a3ae 63 * @brief Renders the contents of the bitmap onto an N5110 screen
el17oc 1:897160a1a3ae 64 *
el17oc 1:897160a1a3ae 65 * @param[in] lcd The screen to use for rendering
el17oc 1:897160a1a3ae 66 * @param[in] x0 The horizontal position in pixels at which to render the bitmap
el17oc 1:897160a1a3ae 67 * @param[in] y0 The vertical position in pixels at which to render the bitmap
el17oc 1:897160a1a3ae 68 *
el17oc 1:897160a1a3ae 69 * @details Note that x0, y0 gives the location of the top-left of the bitmap on
el17oc 1:897160a1a3ae 70 * the screen.
el17oc 1:897160a1a3ae 71 * This function only updates the buffer on the screen. You still need
el17oc 1:897160a1a3ae 72 * to refresh the screen in order to actually see the bitmap.
el17oc 1:897160a1a3ae 73 */
el17oc 1:897160a1a3ae 74 void Bitmap::render(N5110 &lcd,
el17oc 1:897160a1a3ae 75 unsigned int const x0,
el17oc 1:897160a1a3ae 76 unsigned int const y0) const
el17oc 1:897160a1a3ae 77 {
el17oc 1:897160a1a3ae 78 // Loop through each row of the bitmap image
el17oc 1:897160a1a3ae 79 for (unsigned int bitmap_row = 0; bitmap_row < _height; ++bitmap_row)
el17oc 1:897160a1a3ae 80 {
el17oc 1:897160a1a3ae 81 // Row index on the screen for rendering the row of pixels
el17oc 1:897160a1a3ae 82 unsigned int screen_row = y0 + bitmap_row;
el17oc 1:897160a1a3ae 83
el17oc 1:897160a1a3ae 84 // Render each pixel in the row
el17oc 1:897160a1a3ae 85 for (unsigned int bitmap_col = 0; bitmap_col < _width; ++bitmap_col)
el17oc 1:897160a1a3ae 86 {
el17oc 1:897160a1a3ae 87 // Column index on the screen for rendering this pixel
el17oc 1:897160a1a3ae 88 int screen_col = x0 + bitmap_col;
el17oc 1:897160a1a3ae 89
el17oc 1:897160a1a3ae 90 // Find the required value of the pixel at the given location within
el17oc 1:897160a1a3ae 91 // the bitmap data and then write it to the LCD screen
el17oc 1:897160a1a3ae 92 int pixel = get_pixel(bitmap_row, bitmap_col);
el17oc 1:897160a1a3ae 93 lcd.setPixel(screen_col, screen_row, pixel);
el17oc 1:897160a1a3ae 94 }
el17oc 1:897160a1a3ae 95 }
el17oc 1:897160a1a3ae 96 }