113 lines
3.0 KiB
C++
113 lines
3.0 KiB
C++
/*!
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* 03_canvas.cpp
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*
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* Copyright (c) 2015-2024, NADAL Jean-Baptiste. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301 USA
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*
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* @Author: NADAL Jean-Baptiste
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* @Date: 31/01/2024
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*
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*/
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/*---------------------------------------------------------------------------*/
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#include <catch.hpp>
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#include "canvas.h"
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using namespace Raytracer;
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/* ------------------------------------------------------------------------- */
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TEST_CASE("[Canvas] Creating a canvas", "[Canvas]")
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{
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Canvas c(10, 20);
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REQUIRE(c.width() == 10);
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REQUIRE(c.height() == 20);
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for (int i = 0; i < 10; ++i)
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{
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for (int j = 0; j < 20; ++j)
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{
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REQUIRE(c.pixel_at(2, 3) == Color(0, 0, 0));
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}
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}
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}
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/* ------------------------------------------------------------------------- */
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TEST_CASE("[Canvas] Writing pixels to a canvas", "[Canvas]")
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{
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Canvas c(10, 20);
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Color red(1, 0, 0);
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c.write_pixel(2, 3, red);
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REQUIRE(c.pixel_at(2, 3) == red);
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}
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/* ------------------------------------------------------------------------- */
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TEST_CASE("[Canvas] Constructing the PPM pixel data", "[Canvas]")
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{
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std::string ppm, the_ref_ppm;
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Canvas c(5, 3);
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Color c1(1.5, 0, 0);
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Color c2(0, 0.5, 0);
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Color c3(-0.5, 0, 1);
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c.write_pixel(0, 0, c1);
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c.write_pixel(2, 1, c2);
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c.write_pixel(4, 2, c3);
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ppm = c.to_ppm();
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the_ref_ppm = "P3\n5 3\n255\n";
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the_ref_ppm += "255 0 0 0 0 0 0 0 0 0 0 0 0 0 0\n";
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the_ref_ppm += "0 0 0 0 0 0 0 128 0 0 0 0 0 0 0\n";
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the_ref_ppm += "0 0 0 0 0 0 0 0 0 0 0 0 0 0 255\n";
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REQUIRE(ppm == the_ref_ppm);
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}
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/* ------------------------------------------------------------------------- */
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TEST_CASE("[Canvas] Split long lines in PPM files", "[Canvas]")
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{
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std::string ppm, the_ref_ppm;
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Canvas c(10, 2);
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for (int j = 0; j < 2; ++j)
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{
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for (int i = 0; i < 10; ++i)
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{
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c.write_pixel(i, j, Color(1, 0.8, 0.6));
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}
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}
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ppm = c.to_ppm();
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the_ref_ppm = "P3\n10 2\n255\n";
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the_ref_ppm += "255 204 153 255 204 153 255 204 153 255 204 153 255 204 153 255 204\n";
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the_ref_ppm += "153 255 204 153 255 204 153 255 204 153 255 204 153\n";
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the_ref_ppm += "255 204 153 255 204 153 255 204 153 255 204 153 255 204 153 255 204\n";
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the_ref_ppm += "153 255 204 153 255 204 153 255 204 153 255 204 153\n";
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REQUIRE(ppm == the_ref_ppm);
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}
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