Yang Junyao 201090191
Diff: Bitmap.cpp
- Revision:
- 40:c9262294f2e1
- Parent:
- 38:92fad278c2c3
- Child:
- 41:6c046786be6c
--- a/Bitmap.cpp Wed Mar 08 14:20:01 2017 +0000 +++ b/Bitmap.cpp Wed Mar 08 15:48:48 2017 +0000 @@ -2,22 +2,29 @@ #include <iostream> -Bitmap::Bitmap(std::vector<int> const &contents, +#include "N5110.h" + +Bitmap::Bitmap(int const *contents, unsigned int const height, unsigned int const width) : - _contents(contents), + _contents(std::vector<int>(height*width)), _height(height), _width(width) { // Perform a quick sanity check of the dimensions - if (contents.size() != height * height) { - std::cerr << "Contents of bitmap has size " << contents.size() + if (_contents.size() != height * height) { + std::cerr << "Contents of bitmap has size " << _contents.size() << " pixels, but its dimensions were specified as " << width << " * " << height << " = " << width * height; } + + 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 { @@ -31,4 +38,59 @@ // 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; + + int pixel = get_pixel(bitmap_row, bitmap_col); + + if(pixel) lcd.setPixel(screen_col, screen_row); + else lcd.clearPixel(screen_col, screen_row); + } + } } \ No newline at end of file