Resit project for target localisation
Diff: Bitmap.cpp
- Revision:
- 52:7bad54552502
- Parent:
- 51:32f9ffeafb6d
diff -r 32f9ffeafb6d -r 7bad54552502 Bitmap.cpp --- a/Bitmap.cpp Wed Jan 22 13:17:33 2020 +0000 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,96 +0,0 @@ -#include "Bitmap.h" - -#include <iostream> - -#include "N5110.h" - -Bitmap::Bitmap(int const *contents, - unsigned int const height, - unsigned int const width) - : - _contents(std::vector<int>(height*width)), - _height(height), - _width(width) -{ - // Perform a quick sanity check of the dimensions - if (_contents.size() != height * width) { - std::cerr << "Contents of bitmap has size " << _contents.size() - << " pixels, but its dimensions were specified as " - << width << " * " << height << " = " << width * height << std::endl; - } - - for(unsigned int i = 0; i < height*width; ++i) _contents[i] = contents[i]; -} - -/** - * @returns the value of the pixel at the given position - */ -int Bitmap::get_pixel(unsigned int const row, - unsigned int const column) const -{ - // First check that row and column indices are within bounds - if(column >= _width || row >= _height) - { - std::cerr << "The requested pixel with index " << row << "," << column - << "is outside the bitmap dimensions: " << _width << "," - << _height << std::endl; - } - - // Now return the pixel value, using row-major indexing - return _contents[row * _width + column]; -} - -/** - * @brief Prints the contents of the bitmap to the terminal - */ -void Bitmap::print() const -{ - for (unsigned int row = 0; row < _height; ++row) - { - // Print each element of the row - for (unsigned int column = 0; column < _width; ++column) - { - int pixel = get_pixel(row, column); - std::cout << pixel; - } - - // And then terminate with a new-line character - std::cout << std::endl; - } -} - -/** - * @brief Renders the contents of the bitmap onto an N5110 screen - * - * @param[in] lcd The screen to use for rendering - * @param[in] x0 The horizontal position in pixels at which to render the bitmap - * @param[in] y0 The vertical position in pixels at which to render the bitmap - * - * @details Note that x0, y0 gives the location of the top-left of the bitmap on - * the screen. - * This function only updates the buffer on the screen. You still need - * to refresh the screen in order to actually see the bitmap. - */ -void Bitmap::render(N5110 &lcd, - unsigned int const x0, - unsigned int const y0) const -{ - // Loop through each row of the bitmap image - for (unsigned int bitmap_row = 0; bitmap_row < _height; ++bitmap_row) - { - // Row index on the screen for rendering the row of pixels - unsigned int screen_row = y0 + bitmap_row; - - // Render each pixel in the row - for (unsigned int bitmap_col = 0; bitmap_col < _width; ++bitmap_col) - { - // Column index on the screen for rendering this pixel - int screen_col = x0 + bitmap_col; - - // Find the required value of the pixel at the given location within - // the bitmap data and then write it to the LCD screen - int pixel = get_pixel(bitmap_row, bitmap_col); - lcd.setPixel(screen_col, screen_row, pixel); - } - } -} \ No newline at end of file