Initial commit

main/rendering/image.cpp

@@ -0,0 +1,64 @@
+#include "image.h"
+
+#include <cstring>
+#include <filesystem>
+#include <fstream>
+#include <iostream>
+#include <vector>
+
+#include "stb/stb_image.h"
+
+namespace progressia {
+namespace main {
+
+std::size_t Image::getSize() const { return data.size(); }
+
+const Image::Byte *Image::getData() const { return data.data(); }
+
+Image::Byte *Image::getData() { return data.data(); }
+
+Image loadImage(const std::filesystem::path &path) {
+
+    std::ifstream file(path, std::ios::ate | std::ios::binary);
+
+    if (!file.is_open()) {
+        std::cout << "Could not read a PNG image from file " << path
+                  << std::endl;
+        // REPORT_ERROR
+        exit(1);
+    }
+
+    std::size_t fileSize = static_cast<std::size_t>(file.tellg());
+    std::vector<Image::Byte> png(fileSize);
+
+    file.seekg(0);
+    file.read(reinterpret_cast<char *>(png.data()), fileSize);
+
+    file.close();
+
+    int width;
+    int height;
+    int channelsInFile;
+
+    Image::Byte *stbAllocatedData =
+        stbi_load_from_memory(png.data(), png.size(), &width, &height,
+                              &channelsInFile, STBI_rgb_alpha);
+
+    if (stbAllocatedData == NULL) {
+        std::cout << "Could not load a PNG image from file " << path
+                  << std::endl;
+        // REPORT_ERROR
+        exit(1);
+    }
+
+    std::vector<Image::Byte> data(width * height * STBI_rgb_alpha);
+    memcpy(data.data(), stbAllocatedData, data.size());
+
+    stbi_image_free(stbAllocatedData);
+
+    return {static_cast<std::size_t>(width), static_cast<std::size_t>(height),
+            data};
+}
+
+} // namespace main
+} // namespace progressia