Access Color Emoji Font on Windows 8.1 with DirectWrite

emojiinfo.cpp

#include <dwrite.h>
#include <dwrite_2.h>
#include <stdio.h>

#pragma comment(lib, "dwrite.lib")

int main()
{
  HRESULT hr;
  IDWriteFactory* dwriteFactory;

  hr = DWriteCreateFactory(DWRITE_FACTORY_TYPE_SHARED, __uuidof(IDWriteFactory), reinterpret_cast<IUnknown**>(&dwriteFactory));
  if (FAILED(hr)) {
    printf("%d\n", hr);
    return -1;
  }

  IDWriteFontFile* fontFiles;
  WCHAR path[MAX_PATH];
  // Segoe UI Emoji
  wcscpy(path, L"C:\\windows\\fonts\\seguiemj.ttf");
  hr = dwriteFactory->CreateFontFileReference(path, NULL, &fontFiles);
  if (FAILED(hr)) {
    printf("%d\n", hr);
    return -1;
  }

  IDWriteFontFile* file[] = {fontFiles};
  IDWriteFontFace* fontface;

  hr = dwriteFactory->CreateFontFace(DWRITE_FONT_FACE_TYPE_TRUETYPE, 1, file, 0, DWRITE_FONT_SIMULATIONS_NONE, &fontface);
  fontFiles->Release();
  if (FAILED(hr)) {
    printf("%d\n", hr);
    return -1;
  }

  IDWriteFontFace2* fontface2;
  hr = fontface->QueryInterface(reinterpret_cast<IDWriteFontFace2**>(&fontface2));
  fontface->Release();
    if (FAILED(hr)) {
    printf("%d\n", hr);
    return -1;
  }

  printf("IsColorFont: %d\n", fontface2->IsColorFont());
  printf("GetColorPaletteCount: %d\n", fontface2->GetColorPaletteCount());

  printf("palette\n");
  DWRITE_COLOR_F palette[256];
  hr = fontface2->GetPaletteEntries(0, 0, fontface2->GetPaletteEntryCount(), palette);
  if (FAILED(hr)) {
    printf("%d\n", hr);
    return -1;
  }

  for (size_t i = 0; i < fontface2->GetPaletteEntryCount(); i++) {
    printf("%f %f %f %f\n", palette[i].r, palette[i].g, palette[i].b, palette[i].a);
  }

  fontface2->Release();
  dwriteFactory->Release();

  return 0;
}