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