XJEL2645 (18/19) / Mbed 2 deprecated Snake_Project

Du Xianjie 201089059

Dependencies:   mbed FXOS8700Q

N5110/Bitmap.cpp@13:9a6aff771774, 2019-05-06 (annotated)

Committer:
VivianDu
Date:
Mon May 06 04:25:09 2019 +0000
Revision:
13:9a6aff771774
Parent:
0:bc1d36f5f772 
Final Submission. I have read and agreed with Statement of Academic Integrity.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
VivianDu 0:bc1d36f5f772 1 #include "Bitmap.h"
VivianDu 0:bc1d36f5f772 2
VivianDu 0:bc1d36f5f772 3 #include <iostream>
VivianDu 0:bc1d36f5f772 4
VivianDu 0:bc1d36f5f772 5 #include "N5110.h"
VivianDu 0:bc1d36f5f772 6
VivianDu 0:bc1d36f5f772 7 Bitmap::Bitmap(int const *contents,
VivianDu 0:bc1d36f5f772 8 unsigned int const height,
VivianDu 0:bc1d36f5f772 9 unsigned int const width)
VivianDu 0:bc1d36f5f772 10 :
VivianDu 0:bc1d36f5f772 11 _contents(std::vector<int>(height*width)),
VivianDu 0:bc1d36f5f772 12 _height(height),
VivianDu 0:bc1d36f5f772 13 _width(width)
VivianDu 0:bc1d36f5f772 14 {
VivianDu 0:bc1d36f5f772 15 // Perform a quick sanity check of the dimensions
VivianDu 0:bc1d36f5f772 16 if (_contents.size() != height * width) {
VivianDu 0:bc1d36f5f772 17 std::cerr << "Contents of bitmap has size " << _contents.size()
VivianDu 0:bc1d36f5f772 18 << " pixels, but its dimensions were specified as "
VivianDu 0:bc1d36f5f772 19 << width << " * " << height << " = " << width * height << std::endl;
VivianDu 0:bc1d36f5f772 20 }
VivianDu 0:bc1d36f5f772 21
VivianDu 0:bc1d36f5f772 22 for(unsigned int i = 0; i < height*width; ++i) _contents[i] = contents[i];
VivianDu 0:bc1d36f5f772 23 }
VivianDu 0:bc1d36f5f772 24
VivianDu 0:bc1d36f5f772 25 /**
VivianDu 0:bc1d36f5f772 26 * @returns the value of the pixel at the given position
VivianDu 0:bc1d36f5f772 27 */
VivianDu 0:bc1d36f5f772 28 int Bitmap::get_pixel(unsigned int const row,
VivianDu 0:bc1d36f5f772 29 unsigned int const column) const
VivianDu 0:bc1d36f5f772 30 {
VivianDu 0:bc1d36f5f772 31 // First check that row and column indices are within bounds
VivianDu 0:bc1d36f5f772 32 if(column >= _width || row >= _height)
VivianDu 0:bc1d36f5f772 33 {
VivianDu 0:bc1d36f5f772 34 std::cerr << "The requested pixel with index " << row << "," << column
VivianDu 0:bc1d36f5f772 35 << "is outside the bitmap dimensions: " << _width << ","
VivianDu 0:bc1d36f5f772 36 << _height << std::endl;
VivianDu 0:bc1d36f5f772 37 }
VivianDu 0:bc1d36f5f772 38
VivianDu 0:bc1d36f5f772 39 // Now return the pixel value, using row-major indexing
VivianDu 0:bc1d36f5f772 40 return _contents[row * _width + column];
VivianDu 0:bc1d36f5f772 41 }
VivianDu 0:bc1d36f5f772 42
VivianDu 0:bc1d36f5f772 43 /**
VivianDu 0:bc1d36f5f772 44 * @brief Prints the contents of the bitmap to the terminal
VivianDu 0:bc1d36f5f772 45 */
VivianDu 0:bc1d36f5f772 46 void Bitmap::print() const
VivianDu 0:bc1d36f5f772 47 {
VivianDu 0:bc1d36f5f772 48 for (unsigned int row = 0; row < _height; ++row)
VivianDu 0:bc1d36f5f772 49 {
VivianDu 0:bc1d36f5f772 50 // Print each element of the row
VivianDu 0:bc1d36f5f772 51 for (unsigned int column = 0; column < _width; ++column)
VivianDu 0:bc1d36f5f772 52 {
VivianDu 0:bc1d36f5f772 53 int pixel = get_pixel(row, column);
VivianDu 0:bc1d36f5f772 54 std::cout << pixel;
VivianDu 0:bc1d36f5f772 55 }
VivianDu 0:bc1d36f5f772 56
VivianDu 0:bc1d36f5f772 57 // And then terminate with a new-line character
VivianDu 0:bc1d36f5f772 58 std::cout << std::endl;
VivianDu 0:bc1d36f5f772 59 }
VivianDu 0:bc1d36f5f772 60 }
VivianDu 0:bc1d36f5f772 61
VivianDu 0:bc1d36f5f772 62 /**
VivianDu 0:bc1d36f5f772 63 * @brief Renders the contents of the bitmap onto an N5110 screen
VivianDu 0:bc1d36f5f772 64 *
VivianDu 0:bc1d36f5f772 65 * @param[in] lcd The screen to use for rendering
VivianDu 0:bc1d36f5f772 66 * @param[in] x0 The horizontal position in pixels at which to render the bitmap
VivianDu 0:bc1d36f5f772 67 * @param[in] y0 The vertical position in pixels at which to render the bitmap
VivianDu 0:bc1d36f5f772 68 *
VivianDu 0:bc1d36f5f772 69 * @details Note that x0, y0 gives the location of the top-left of the bitmap on
VivianDu 0:bc1d36f5f772 70 * the screen.
VivianDu 0:bc1d36f5f772 71 * This function only updates the buffer on the screen. You still need
VivianDu 0:bc1d36f5f772 72 * to refresh the screen in order to actually see the bitmap.
VivianDu 0:bc1d36f5f772 73 */
VivianDu 0:bc1d36f5f772 74 void Bitmap::render(N5110 &lcd,
VivianDu 0:bc1d36f5f772 75 unsigned int const x0,
VivianDu 0:bc1d36f5f772 76 unsigned int const y0) const
VivianDu 0:bc1d36f5f772 77 {
VivianDu 0:bc1d36f5f772 78 // Loop through each row of the bitmap image
VivianDu 0:bc1d36f5f772 79 for (unsigned int bitmap_row = 0; bitmap_row < _height; ++bitmap_row)
VivianDu 0:bc1d36f5f772 80 {
VivianDu 0:bc1d36f5f772 81 // Row index on the screen for rendering the row of pixels
VivianDu 0:bc1d36f5f772 82 unsigned int screen_row = y0 + bitmap_row;
VivianDu 0:bc1d36f5f772 83
VivianDu 0:bc1d36f5f772 84 // Render each pixel in the row
VivianDu 0:bc1d36f5f772 85 for (unsigned int bitmap_col = 0; bitmap_col < _width; ++bitmap_col)
VivianDu 0:bc1d36f5f772 86 {
VivianDu 0:bc1d36f5f772 87 // Column index on the screen for rendering this pixel
VivianDu 0:bc1d36f5f772 88 int screen_col = x0 + bitmap_col;
VivianDu 0:bc1d36f5f772 89
VivianDu 0:bc1d36f5f772 90 int pixel = get_pixel(bitmap_row, bitmap_col);
VivianDu 0:bc1d36f5f772 91
VivianDu 0:bc1d36f5f772 92 if(pixel) lcd.setPixel(screen_col, screen_row);
VivianDu 0:bc1d36f5f772 93 else lcd.clearPixel(screen_col, screen_row);
VivianDu 0:bc1d36f5f772 94 }
VivianDu 0:bc1d36f5f772 95 }
VivianDu 0:bc1d36f5f772 96 }