/* * DoRayMe - a quick and dirty Raytracer * Canvas implementation * * Created by Manoƫl Trapier * Copyright (c) 2020 986-Studio. * */ #include #include #define BPP (24) #define BytePP (BPP / 8) #define MIN(_a, _b) ((_a)<(_b)?(_a):(_b)) #define MAX(_a, _b) ((_a)>(_b)?(_a):(_b)) Canvas::Canvas(uint32_t width, uint32_t height) : width(width), height(height) { this->bitmap = (uint8_t *)calloc(4, width * height); this->stride = BytePP * width; } Canvas::~Canvas() { if (this->bitmap != nullptr) { free(this->bitmap); } } void Canvas::put_pixel(uint32_t x, uint32_t y, Colour c) { uint32_t offset = y * this->stride + x * BytePP; this->bitmap[offset + 0] = MAX(MIN(c.red() * 255, 255), 0); this->bitmap[offset + 1] = MAX(MIN(c.green() * 255, 255), 0); this->bitmap[offset + 2] = MAX(MIN(c.blue() * 255, 255), 0); } Colour Canvas::get_pixel(uint32_t x, uint32_t y) { uint32_t offset = y * this->stride + x * BytePP; return Colour(this->bitmap[offset + 0] / 255, this->bitmap[offset + 1] / 255, this->bitmap[offset + 2] / 255); } bool Canvas::SaveAsPNG(const char *filename) { uint32_t ret = lodepng_encode24_file(filename, this->bitmap, this->width, this->height); if (ret > 0) { printf("lodepng_encode_file returned %d!\n", ret); } return ret == 0; }