Initial Comit

tools/img2c/CMakeLists.txt

@@ -0,0 +1,6 @@
+cmake_minimum_required(VERSION 3.22)
+
+project(img2c LANGUAGES CXX)
+
+add_executable(img2c source/main.cpp)
+target_include_directories(img2c PRIVATE include)

tools/img2c/source/main.cpp

@@ -0,0 +1,37 @@
+#define STB_IMAGE_IMPLEMENTATION
+#include <stb_image.h>
+
+#include <cstdio>
+#include <iostream>
+#include <vector>
+
+/**
+ * Usage:
+ * img2c <image> > out.c
+ */
+int main(int argc, char* argv[]) {
+  int w, h, c;
+  unsigned char* buf = stbi_load(argv[1], &w, &h, &c, 3);
+
+  std::vector<uint16_t> rgb565;
+
+  for (int i = 0; i < w * h * 3; i += 3) {
+    unsigned char r = buf[i];
+    unsigned char g = buf[i + 1];
+    unsigned char b = buf[i + 2];
+
+    uint16_t color = ((r >> 3) << 11) | ((g >> 2) << 5) | (b >> 3);
+    rgb565.push_back(color);
+  }
+
+  std::cout << "const uint16_t image[" << w * h << "] = {\n";
+  for (size_t i = 0; i < rgb565.size(); ++i) {
+    printf("0x%04X", rgb565[i]);
+    if (i != rgb565.size() - 1) std::cout << ", ";
+    if ((i + 1) % 8 == 0) std::cout << "\n";
+  }
+  std::cout << "\n};\n";
+
+  stbi_image_free(buf);
+  return 0;
+}