image_loader_lunasvg.h

/*************************************************************************/
/*  resource_importer_lunasvg.h	                                         */
/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
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#ifndef RESOURCE_IMPORTER_LUNASVG
#define RESOURCE_IMPORTER_LUNASVG

#include "core/error/error_macros.h"
#endif // RESOURCE_IMPORTER_LUNASVG
#include "core/io/image_loader.h"
#include "core/string/ustring.h"

#include <iostream>
#include <memory>
#include <sstream>

#include "3rdpath/lunasvg/include/document.h"
#include <stdint.h>

#include "core/templates/local_vector.h"


class ImageLoaderLunaSVG : public ImageFormatLoader {

public:
  static void create_image_from_string(Ref<Image> p_image, String p_string, float p_scale, bool upsample, bool p_convert_color) {
      using namespace lunasvg;
      Vector<uint8_t> data = p_string.to_utf8_buffer();
      std::unique_ptr<Document> document =
          Document::loadFromData((const char *)data.ptr(), data.size());
      std::uint32_t width = document->width(), height = document->height();
      width *= p_scale;
      height *= p_scale;
      std::uint32_t bgColor = 0x00000000;
      Bitmap bitmap = document->renderToBitmap(width, height, bgColor);
      ERR_FAIL_COND(!bitmap.valid());
      size_t size = width * height * 4; // RGBA8
      Vector<uint8_t> result;
      result.resize(size);
      memcpy(result.ptrw(), bitmap.data(), size);
      p_image->create(width, height, false, Image::FORMAT_RGBA8, result);
  }
  virtual Error load_image(Ref<Image> p_image, FileAccess *p_fileaccess,
                           bool p_force_linear, float p_scale) override {
    String svg = p_fileaccess->get_as_utf8_string();
    create_image_from_string(p_image, svg, p_scale, false, false);
    ERR_FAIL_COND_V(p_image->is_empty(), FAILED);
    if (p_force_linear) {
      p_image->srgb_to_linear();
    }
    return OK;
  }

  virtual void
  get_recognized_extensions(List<String> *p_extensions) const override {
    p_extensions->push_back("svg");
    p_extensions->push_back("svgz");
  }

public:
  virtual ~ImageLoaderLunaSVG() {}
};