TTF Loading Fixed

src/dawntools/truetypetool/CMakeLists.txt

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+# Copyright (c) 2021 Dominic Msters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+project(truetypetool VERSION 2.0)
+add_executable(truetypetool)
+
+target_sources(truetypetool
+  PRIVATE
+    ${DAWN_SHARED_SOURCES}
+    ${DAWN_TOOL_SOURCES}
+    TrueTypeTool.cpp
+)
+
+target_include_directories(truetypetool
+  PUBLIC
+    ${DAWN_SHARED_INCLUDES}
+    ${DAWN_TOOL_INCLUDES}
+    ${CMAKE_CURRENT_LIST_DIR}
+)
+
+# Definitions
+target_compile_definitions(truetypetool
+  PUBLIC
+    ${DAWN_SHARED_DEFINITIONS}
+    DAWN_TOOL_INSTANCE=TrueTypeTool
+    DAWN_TOOL_HEADER="TrueTypeTool.hpp"
+)
+
+# Libraries
+target_link_libraries(truetypetool
+  PUBLIC
+    ${DAWN_BUILD_HOST_LIBS}
+    stb
+)
+
+# Tool Function
+function(tool_truetype target in)
+  set(DEPS "")
+  if(DAWN_BUILD_TOOLS)
+    set(DEPS truetypetool)
+  endif()
+
+  add_custom_target(${target}
+    COMMAND truetypetool --input="${DAWN_ASSETS_SOURCE_DIR}/${in}" --output="${DAWN_ASSETS_BUILD_DIR}/${target}"
+    COMMENT "Generating truetype font ${target} from ${in}"
+    DEPENDS ${DEPS}
+  )
+  add_dependencies(${DAWN_TARGET_NAME} ${target})
+endfunction()

src/dawntools/truetypetool/TrueTypeTool.cpp

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+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#include "TrueTypeTool.hpp"
+#ifndef  STB_TRUETYPE_IMPLEMENTATION
+  #define STB_TRUETYPE_IMPLEMENTATION
+  #include <stb_truetype.h>
+#endif
+
+using namespace Dawn;
+
+std::vector<std::string> TrueTypeTool::getRequiredFlags() {
+  return { "input", "output" };
+}
+
+int32_t TrueTypeTool::start() {
+  File fileIn(flags["input"]);
+  char *ttfData = nullptr;
+  if(!fileIn.readToBuffer(&ttfData)) {
+    std::cout << "Failed to read file to buffer!" << std::endl;
+    return 1;
+  }
+
+  // Create bitmap data. This is a single channel color (alpha).
+  size_t width = 1024;
+  size_t height = 1024;
+  float_t fontSize = 128.0f;
+  size_t textureSize = width * height;
+  stbi_uc *bitmapData = new stbi_uc[textureSize];
+  stbtt_bakedchar characterData[TRUETYPE_NUM_CHARS];
+
+  // Now parse the TTF itself.
+  stbtt_BakeFontBitmap(
+    (uint8_t*)ttfData, 0, (float)fontSize, bitmapData,
+    width, height,
+    TRUETYPE_FIRST_CHAR, TRUETYPE_NUM_CHARS,
+    characterData
+  );
+
+  // Prepare output file for writing.
+  File fileOut(flags["output"] + ".truetype");
+  if(!fileOut.mkdirp()) {
+    free(ttfData);
+    delete bitmapData;
+    std::cout << "Failed to create output directory!" << std::endl;
+    return 1;
+  }
+  if(!fileOut.open(FILE_MODE_WRITE)) {
+    free(ttfData);
+    delete bitmapData;
+    std::cout << "Failed to open output file for writing!" << std::endl;
+    return 1;
+  }
+
+  // Write data
+  fileOut.writeString(std::to_string(width) + "|" + std::to_string(height) + "|" + std::to_string(fontSize) + "|");
+  uint8_t pixels[4];
+  for(size_t i = 0; i < textureSize; i++) {
+    pixels[0] = 255;
+    pixels[1] = 255;
+    pixels[2] = 255;
+    pixels[3] = bitmapData[i];
+    fileOut.writeRaw((char*)pixels, 4);
+  }
+
+  // Write quads
+  fileOut.writeRaw((char*)characterData, sizeof(stbtt_bakedchar) * TRUETYPE_NUM_CHARS);
+  free(ttfData);
+  delete bitmapData;
+  fileOut.close();
+  
+  return 0;
+}

src/dawntools/truetypetool/TrueTypeTool.hpp

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+// Copyright (c) 2023 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "util/DawnTool.hpp"
+#include "util/File.hpp"
+#include "util/Image.hpp"
+
+#define TRUETYPE_FIRST_CHAR 32
+#define TRUETYPE_NUM_CHARS 96
+
+namespace Dawn {
+  class TrueTypeTool : public DawnTool {
+    protected:
+      std::vector<std::string> getRequiredFlags() override;
+
+    public:
+      int32_t start();
+  };
+}