Added PPM writer

app/CMakeLists.txt

@@ -9,4 +9,5 @@ target_compile_features(${target} PRIVATE cxx_std_23)
 target_link_libraries(${target}
     PRIVATE
         project_core
+        project_image_writers
 )

app/main.cpp

@@ -1,6 +1,27 @@
+#include "PpmImage.hpp"
+#include <cstdint>
 #include <print>
+#include <vector>
 
 int main(int argc, char **argv) {
   std::println("Hello, GraphicsSandbox!");
+
+  // Generate PPM image
+  constexpr size_t imageWidth = 256;
+  constexpr size_t imageHeight = 256;
+  std::vector<std::vector<std::uint8_t>> imageData;
+  imageData.resize(imageWidth);
+  for (auto &row : imageData) {
+    row.resize(imageHeight);
+  }
+
+  image_writers::PpmImage ppmImage(imageData);
+
+  if (ppmImage.writeToFile("Image.ppm")) {
+    std::println("Wrote PPM image");
+  } else {
+    std::println("Failed to write PPM image");
+  }
+
   return 0;
 }

src/CMakeLists.txt

@@ -1 +1,2 @@
-add_subdirectory(core)
+add_subdirectory(core)
+add_subdirectory(image_writers)

src/image_writers/CMakeLists.txt

@@ -0,0 +1,13 @@
+set(target project_image_writers)
+
+add_library(${target}
+    Image.hpp
+    PpmImage.cpp
+    PpmImage.hpp
+)
+
+target_compile_features(${target} PRIVATE cxx_std_23)
+
+target_include_directories(${target} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
+
+# target_link_libraries(${target} PRIVATE)

src/image_writers/Image.hpp

@@ -0,0 +1,17 @@
+#ifndef IMAGE_HPP
+#define IMAGE_HPP
+
+#include <filesystem>
+
+namespace image_writers {
+
+class Image {
+public:
+  virtual ~Image() = default;
+
+  virtual bool writeToFile(const std::filesystem::path &filePath) = 0;
+};
+
+} // namespace image_writers
+
+#endif // IMAGE_HPP

src/image_writers/PpmImage.cpp

@@ -0,0 +1,58 @@
+#include "PpmImage.hpp"
+
+#include <fstream>
+#include <ios>
+#include <print>
+
+image_writers::PpmImage::PpmImage(
+    const std::vector<std::vector<std::uint8_t>> &imageData)
+    : imageData_(imageData) {}
+
+bool image_writers::PpmImage::writeToFile(
+    const std::filesystem::path &filePath) {
+
+  const size_t height = imageData_[0].size();
+  const size_t width = imageData_.size();
+
+  if (width == 0 || height == 0) {
+    std::println("PpmImage::writeToFile() - Invalid image size");
+    return false;
+  }
+
+  std::println("PpmImage::writeToFile() - Width {}, Height: {}", width, height);
+
+  std::ofstream outFile;
+  outFile.open(filePath, std::ios_base::out | std::ios_base::binary);
+
+  if (outFile.is_open()) {
+    // Create PPM header
+    outFile << "P3\n";                         // ASCII
+    outFile << width << ' ' << height << '\n'; // Width and height
+    outFile << "255\n";                        // Max color
+
+    // Write image data
+    for (size_t currHeight = 0; currHeight < height; ++currHeight) {
+      for (size_t currWidth = 0; currWidth < width; ++currWidth) {
+        // TODO: Currently overriding colors; make logic for colors
+        const auto r = static_cast<double>(currWidth) / (width - 1);
+        const auto g = static_cast<double>(currHeight) / (height - 1);
+        const auto b = 0.0;
+
+        const auto ir = static_cast<std::uint8_t>(255.999 * r);
+        const auto ig = static_cast<std::uint8_t>(255.999 * g);
+        const auto ib = static_cast<std::uint8_t>(255.999 * b);
+
+        outFile << std::format("{} {} {}\n", ir, ig, ib);
+      }
+    }
+
+    // Cleanup
+    outFile.close();
+
+    return true;
+  }
+
+  std::println("PpmImage::writeToFile() - Failed to write image file");
+
+  return false;
+}

src/image_writers/PpmImage.hpp

@@ -0,0 +1,23 @@
+#ifndef PPM_IMAGE_HPP
+#define PPM_IMAGE_HPP
+
+#include "Image.hpp"
+#include <cstdint>
+#include <vector>
+
+namespace image_writers {
+
+class PpmImage : public Image {
+public:
+  PpmImage(const std::vector<std::vector<std::uint8_t>> &imageData);
+  ~PpmImage() = default;
+
+  bool writeToFile(const std::filesystem::path &filePath) override;
+
+private:
+  const std::vector<std::vector<std::uint8_t>> &imageData_;
+};
+
+} // namespace image_writers
+
+#endif