From ac84d77d14d9461b300f0aa5cb7083ef0c9e5531 Mon Sep 17 00:00:00 2001
From: NADAL Jean-Baptiste <jbnadal@cabassegroup.com>
Date: Wed, 28 Feb 2024 14:08:42 +0100
Subject: [PATCH] Make openMP tests

---
 CMakeLists.txt                     | 4 +++-
 apps/CMakeLists.txt                | 4 ++--
 raytracing/CMakeLists.txt          | 2 +-
 raytracing/src/renderer/camera.cpp | 4 ++++
 4 files changed, 10 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3b41b05..0e6d1c7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,10 +1,12 @@
-cmake_minimum_required(VERSION 3.14)
+cmake_minimum_required(VERSION 3.19)
 
 project(raytracing_challenge
         VERSION 0.1
         DESCRIPTION "Raytracing Challenge in C++"
 )
 
+find_package(OpenMP)
+
 add_subdirectory(raytracing)
 add_subdirectory(apps)
 add_subdirectory(tests)
diff --git a/apps/CMakeLists.txt b/apps/CMakeLists.txt
index 21c1b3e..f571604 100644
--- a/apps/CMakeLists.txt
+++ b/apps/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.14)
+cmake_minimum_required(VERSION 3.19)
 
 project(main)
 
@@ -15,4 +15,4 @@ add_executable(chapter_07 chapter_07.cpp)
 target_link_libraries(chapter_07 PRIVATE raytracing gcov)
 
 add_executable(chapter_09 chapter_09.cpp)
-target_link_libraries(chapter_09 PRIVATE raytracing gcov)
\ No newline at end of file
+target_link_libraries(chapter_09 PRIVATE raytracing gcov OpenMP::OpenMP_CXX)
diff --git a/raytracing/CMakeLists.txt b/raytracing/CMakeLists.txt
index 4a1edb0..56a1ad4 100644
--- a/raytracing/CMakeLists.txt
+++ b/raytracing/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.14)
+cmake_minimum_required(VERSION 3.19)
 
 project(raytracing)
 
diff --git a/raytracing/src/renderer/camera.cpp b/raytracing/src/renderer/camera.cpp
index 0a1e763..276a2e1 100644
--- a/raytracing/src/renderer/camera.cpp
+++ b/raytracing/src/renderer/camera.cpp
@@ -29,11 +29,14 @@
 /* ------------------------------------------------------------------------- */
 
 #include <cmath>
+#include <omp.h>
 
 #include "camera.h"
 
 using namespace Raytracer;
 
+#pragma omp parallel for num_threads(omp_get_num_procs())
+
 /* ------------------------------------------------------------------------- */
 
 Camera::Camera(void) : m_h_size(0), m_v_size(0), m_field_of_view(0), m_half_width(0), m_half_height(0), m_pixel_size(0)
@@ -178,6 +181,7 @@ Canvas Camera::render(const World &a_world)
 {
     Canvas the_image(m_h_size, m_v_size);
 
+#pragma omp parallel for shared(the_image)
     for (int y = 0; y < m_v_size - 1; y++)
     {
         for (int x = 0; x < m_h_size - 1; x++)