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- /*
- * DoRayMe - a quick and dirty Raytracer
- * Canvas implementation
- *
- * Created by Manoël Trapier
- * Copyright (c) 2020 986-Studio.
- *
- */
- #include <canvas.h>
- #include <lodepng.h>
- #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;
- }
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