Yiming Zhang / Mbed 2 deprecated botton

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Dependencies:   mbed

N5110/Bitmap.cpp@0:9a525a0d1d3f, 2020-04-27 (annotated)

Committer:
sjuzyz
Date:
Mon Apr 27 12:01:16 2020 +0000
Revision:
0:9a525a0d1d3f
mid

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sjuzyz 0:9a525a0d1d3f 1 #include "Bitmap.h"
sjuzyz 0:9a525a0d1d3f 2
sjuzyz 0:9a525a0d1d3f 3 #include <iostream>
sjuzyz 0:9a525a0d1d3f 4
sjuzyz 0:9a525a0d1d3f 5 #include "N5110.h"
sjuzyz 0:9a525a0d1d3f 6
sjuzyz 0:9a525a0d1d3f 7 Bitmap::Bitmap(int const *contents,
sjuzyz 0:9a525a0d1d3f 8 unsigned int const height,
sjuzyz 0:9a525a0d1d3f 9 unsigned int const width)
sjuzyz 0:9a525a0d1d3f 10 :
sjuzyz 0:9a525a0d1d3f 11 _contents(std::vector<int>(height*width)),
sjuzyz 0:9a525a0d1d3f 12 _height(height),
sjuzyz 0:9a525a0d1d3f 13 _width(width)
sjuzyz 0:9a525a0d1d3f 14 {
sjuzyz 0:9a525a0d1d3f 15 // Perform a quick sanity check of the dimensions
sjuzyz 0:9a525a0d1d3f 16 if (_contents.size() != height * width) {
sjuzyz 0:9a525a0d1d3f 17 std::cerr << "Contents of bitmap has size " << _contents.size()
sjuzyz 0:9a525a0d1d3f 18 << " pixels, but its dimensions were specified as "
sjuzyz 0:9a525a0d1d3f 19 << width << " * " << height << " = " << width * height << std::endl;
sjuzyz 0:9a525a0d1d3f 20 }
sjuzyz 0:9a525a0d1d3f 21
sjuzyz 0:9a525a0d1d3f 22 for(unsigned int i = 0; i < height*width; ++i) _contents[i] = contents[i];
sjuzyz 0:9a525a0d1d3f 23 }
sjuzyz 0:9a525a0d1d3f 24
sjuzyz 0:9a525a0d1d3f 25 /**
sjuzyz 0:9a525a0d1d3f 26 * @returns the value of the pixel at the given position
sjuzyz 0:9a525a0d1d3f 27 */
sjuzyz 0:9a525a0d1d3f 28 int Bitmap::get_pixel(unsigned int const row,
sjuzyz 0:9a525a0d1d3f 29 unsigned int const column) const
sjuzyz 0:9a525a0d1d3f 30 {
sjuzyz 0:9a525a0d1d3f 31 // First check that row and column indices are within bounds
sjuzyz 0:9a525a0d1d3f 32 if(column >= _width || row >= _height)
sjuzyz 0:9a525a0d1d3f 33 {
sjuzyz 0:9a525a0d1d3f 34 std::cerr << "The requested pixel with index " << row << "," << column
sjuzyz 0:9a525a0d1d3f 35 << "is outside the bitmap dimensions: " << _width << ","
sjuzyz 0:9a525a0d1d3f 36 << _height << std::endl;
sjuzyz 0:9a525a0d1d3f 37 }
sjuzyz 0:9a525a0d1d3f 38
sjuzyz 0:9a525a0d1d3f 39 // Now return the pixel value, using row-major indexing
sjuzyz 0:9a525a0d1d3f 40 return _contents[row * _width + column];
sjuzyz 0:9a525a0d1d3f 41 }
sjuzyz 0:9a525a0d1d3f 42
sjuzyz 0:9a525a0d1d3f 43 /**
sjuzyz 0:9a525a0d1d3f 44 * @brief Prints the contents of the bitmap to the terminal
sjuzyz 0:9a525a0d1d3f 45 */
sjuzyz 0:9a525a0d1d3f 46 void Bitmap::print() const
sjuzyz 0:9a525a0d1d3f 47 {
sjuzyz 0:9a525a0d1d3f 48 for (unsigned int row = 0; row < _height; ++row)
sjuzyz 0:9a525a0d1d3f 49 {
sjuzyz 0:9a525a0d1d3f 50 // Print each element of the row
sjuzyz 0:9a525a0d1d3f 51 for (unsigned int column = 0; column < _width; ++column)
sjuzyz 0:9a525a0d1d3f 52 {
sjuzyz 0:9a525a0d1d3f 53 int pixel = get_pixel(row, column);
sjuzyz 0:9a525a0d1d3f 54 std::cout << pixel;
sjuzyz 0:9a525a0d1d3f 55 }
sjuzyz 0:9a525a0d1d3f 56
sjuzyz 0:9a525a0d1d3f 57 // And then terminate with a new-line character
sjuzyz 0:9a525a0d1d3f 58 std::cout << std::endl;
sjuzyz 0:9a525a0d1d3f 59 }
sjuzyz 0:9a525a0d1d3f 60 }
sjuzyz 0:9a525a0d1d3f 61
sjuzyz 0:9a525a0d1d3f 62 /**
sjuzyz 0:9a525a0d1d3f 63 * @brief Renders the contents of the bitmap onto an N5110 screen
sjuzyz 0:9a525a0d1d3f 64 *
sjuzyz 0:9a525a0d1d3f 65 * @param[in] lcd The screen to use for rendering
sjuzyz 0:9a525a0d1d3f 66 * @param[in] x0 The horizontal position in pixels at which to render the bitmap
sjuzyz 0:9a525a0d1d3f 67 * @param[in] y0 The vertical position in pixels at which to render the bitmap
sjuzyz 0:9a525a0d1d3f 68 *
sjuzyz 0:9a525a0d1d3f 69 * @details Note that x0, y0 gives the location of the top-left of the bitmap on
sjuzyz 0:9a525a0d1d3f 70 * the screen.
sjuzyz 0:9a525a0d1d3f 71 * This function only updates the buffer on the screen. You still need
sjuzyz 0:9a525a0d1d3f 72 * to refresh the screen in order to actually see the bitmap.
sjuzyz 0:9a525a0d1d3f 73 */
sjuzyz 0:9a525a0d1d3f 74 void Bitmap::render(N5110 &lcd,
sjuzyz 0:9a525a0d1d3f 75 unsigned int const x0,
sjuzyz 0:9a525a0d1d3f 76 unsigned int const y0) const
sjuzyz 0:9a525a0d1d3f 77 {
sjuzyz 0:9a525a0d1d3f 78 // Loop through each row of the bitmap image
sjuzyz 0:9a525a0d1d3f 79 for (unsigned int bitmap_row = 0; bitmap_row < _height; ++bitmap_row)
sjuzyz 0:9a525a0d1d3f 80 {
sjuzyz 0:9a525a0d1d3f 81 // Row index on the screen for rendering the row of pixels
sjuzyz 0:9a525a0d1d3f 82 unsigned int screen_row = y0 + bitmap_row;
sjuzyz 0:9a525a0d1d3f 83
sjuzyz 0:9a525a0d1d3f 84 // Render each pixel in the row
sjuzyz 0:9a525a0d1d3f 85 for (unsigned int bitmap_col = 0; bitmap_col < _width; ++bitmap_col)
sjuzyz 0:9a525a0d1d3f 86 {
sjuzyz 0:9a525a0d1d3f 87 // Column index on the screen for rendering this pixel
sjuzyz 0:9a525a0d1d3f 88 int screen_col = x0 + bitmap_col;
sjuzyz 0:9a525a0d1d3f 89
sjuzyz 0:9a525a0d1d3f 90 // Find the required value of the pixel at the given location within
sjuzyz 0:9a525a0d1d3f 91 // the bitmap data and then write it to the LCD screen
sjuzyz 0:9a525a0d1d3f 92 int pixel = get_pixel(bitmap_row, bitmap_col);
sjuzyz 0:9a525a0d1d3f 93 lcd.setPixel(screen_col, screen_row, pixel);
sjuzyz 0:9a525a0d1d3f 94 }
sjuzyz 0:9a525a0d1d3f 95 }
sjuzyz 0:9a525a0d1d3f 96 }