C++ RefPtr::get_width方法代码示例

void NodeRenderer::icon(const Cairo::RefPtr<Cairo::Context>& cr, AssetCache& cache)
{
	// path to icon not set
	if (s->icon_image.str().size() == 0 || s->icon_width == 0.0 || s->icon_height == 0.0)
		return;

	cr->save();

	Cairo::RefPtr<Cairo::ImageSurface> image = cache.getImage(s->icon_image.str());
	double width = s->icon_width < 0 ? image->get_width() : s->icon_width;
	double height = s->icon_height < 0 ? image->get_height() : s->icon_height;
	double x0 = floor(location.x - width/2.0);
	double y0 = floor(location.y - height/2.0);
	cr->translate(x0, y0);
	cr->scale(width / image->get_width(),
			  height / image->get_height());
	cr->set_source(image, 0, 0);

	if (s->icon_opacity < 1.0)
		cr->paint_with_alpha(s->icon_opacity);
	else
		cr->paint();

	cr->restore();
}

TexturePtr
TextSurface::create_opengl_texture(Cairo::RefPtr<Cairo::ImageSurface> surface)
{
  assert(surface);

  TexturePtr texture = Texture::create_handle(GL_TEXTURE_2D);

  glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  glPixelStorei(GL_UNPACK_ROW_LENGTH, surface->get_width());

  glActiveTexture(GL_TEXTURE0);
  glBindTexture(GL_TEXTURE_2D, texture->get_id());
  assert_gl("Texture failure");

  // flip RGBA to BGRA
  for(int y = 0; y < surface->get_height(); ++y)
  {
    uint8_t* pixels = surface->get_data() + surface->get_stride() * y;

    for(int x = 0; x < surface->get_width()*4; x += 4)
    {
      uint8_t r = pixels[x+0];
      uint8_t g = pixels[x+1];
      uint8_t b = pixels[x+2];
      uint8_t a = pixels[x+3];

      // removing pre-multiplayed alpha
      if (a != 0)
      {
        pixels[x+0] = static_cast<uint8_t>(b * 255 / a);
        pixels[x+1] = static_cast<uint8_t>(g * 255 / a);
        pixels[x+2] = static_cast<uint8_t>(r * 255 / a);
      }

      // debug foobar
      //if (pixels[x+3] == 0)
      //  pixels[x+3] = 32;
    }
  }

  glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
               surface->get_width(), surface->get_height(), 0,
               GL_RGBA, GL_UNSIGNED_BYTE, surface->get_data());
  assert_gl("Texture failure");

  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);

  return texture;
}

Cairo::RefPtr<Cairo::ImageSurface> ImagesStorage::loadFrenchCard(Cairo::RefPtr<Cairo::ImageSurface> sourceImages, Preference::Card card)
{
	Cairo::RefPtr<Cairo::ImageSurface> cardImage = Cairo::ImageSurface::create(Cairo::FORMAT_ARGB32, 
		sourceImages->get_width() / 13.0, sourceImages->get_height() / 5.0);
	Cairo::RefPtr<Cairo::Context> cardsImagesDrawer = Cairo::Context::create( cardImage );
	cardsImagesDrawer->set_source_rgb(1, 1, 1);
	double x = getFrenchCardCoord(card, CT_X, sourceImages->get_width());
	double y = getFrenchCardCoord(card, CT_Y, sourceImages->get_height());
	cardsImagesDrawer->set_source(sourceImages, -x, -y);
	cardsImagesDrawer->rectangle(0, 0, sourceImages->get_width() / 13.0, sourceImages->get_height() / 5.0);
	cardsImagesDrawer->clip();
	cardsImagesDrawer->paint();
	return cardImage;
}

	Image::Image(const Cairo::RefPtr<Cairo::ImageSurface>& image) :
		m_width(image->get_width()),
		m_height(image->get_height())
	{
		unsigned char* data = image->get_data();
		size_t length = image->get_width() * image->get_height();

		for(size_t i = 0; i < length; ++i)
		{
			m_blue.push_back(static_cast<double>(data[i * 4]));
			m_green.push_back(static_cast<double>(data[i * 4 + 1]));
			m_red.push_back(static_cast<double>(data[i * 4 + 2]));
		}
	}

void glDrawCairoSurface(const Cairo::RefPtr<Cairo::ImageSurface> surface,
			const Vector2d &min, const Vector2d &max,
			const double z)
{
  if (surface==0) return;
  int w = surface->get_width();
  int h = surface->get_height();
  unsigned char * data = surface->get_data();

  GLuint texture; glGenTextures( 1, &texture );
  glBindTexture( GL_TEXTURE_2D, texture );

  // http://www.nullterminator.net/gltexture.html
  // select modulate to mix texture with color for shading
  glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
  // when texture area is small, bilinear filter the closest mipmap
  glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
		   GL_LINEAR_MIPMAP_NEAREST );
  // when texture area is large, bilinear filter the original
  glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );

  // build our texture mipmaps
  gluBuild2DMipmaps( GL_TEXTURE_2D, GL_ALPHA, w, h,
		     GL_ALPHA, GL_UNSIGNED_BYTE, data );

  glEnable(GL_TEXTURE_2D);
  glBegin(GL_QUADS);
  glTexCoord2d(0.0,0.0); glVertex3d(min.x(),min.y(),z);
  glTexCoord2d(1.0,0.0); glVertex3d(max.x(),min.y(),z);
  glTexCoord2d(1.0,1.0); glVertex3d(max.x(),max.y(),z);
  glTexCoord2d(0.0,1.0); glVertex3d(min.x(),max.y(),z);
  glEnd();
  glDisable(GL_TEXTURE_2D);
  glDeleteTextures( 1, &texture );
}

std::shared_ptr<TextSurface>
TextSurface::create(const std::string& text, const TextProperties& text_props)
{
  Cairo::TextExtents text_extents;
  Cairo::FontExtents font_extents;

  Cairo::RefPtr<Cairo::ImageSurface> surface = create_cairo_surface(text, text_props,
                                                                    text_extents, font_extents);
  int width  = surface->get_width();
  int height = surface->get_height();
  TexturePtr texture = create_opengl_texture(surface);

  MaterialPtr material = std::make_shared<Material>();

  material->set_program(Program::create(Shader::from_file(GL_VERTEX_SHADER,   "src/basic_texture.vert"),
                                        Shader::from_file(GL_FRAGMENT_SHADER, "src/basic_texture.frag")));

  material->enable(GL_BLEND);
  material->blend_func(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
  material->set_texture(0, texture);
  material->set_uniform("texture_diff", 0);
  material->set_uniform("MVP", UniformSymbol::ModelViewProjectionMatrix);

  return std::make_shared<TextSurface>(material, width, height,
                                       text_extents, font_extents);
}

int main()
{
  Cairo::RefPtr<Cairo::ImageSurface> surface =
    Cairo::ImageSurface::create(Cairo::FORMAT_ARGB32, 600, 400);

  Cairo::RefPtr<Cairo::Context> cr = Cairo::Context::create(surface);

  cr->save(); // save the state of the context
  cr->set_source_rgb(0.86, 0.85, 0.47);
  cr->paint();   // fill image with the color
  cr->restore(); // color is back to black now

  cr->save();
  // draw a border around the image
  cr->set_line_width(20.0); // make the line wider
  cr->rectangle(0.0, 0.0, surface->get_width(), surface->get_height());
  cr->stroke();

  cr->set_source_rgba(0.0, 0.0, 0.0, 0.7);
  // draw a circle in the center of the image
  cr->arc(surface->get_width() / 2.0, surface->get_height() / 2.0,
          surface->get_height() / 4.0, 0.0, 2.0 * M_PI);
  cr->stroke();

  // draw a diagonal line
  cr->move_to(surface->get_width() / 4.0, surface->get_height() / 4.0);
  cr->line_to(surface->get_width() * 3.0 / 4.0,
              surface->get_height() * 3.0 / 4.0);
  cr->stroke();
  cr->restore();

#ifdef CAIRO_HAS_PNG_FUNCTIONS

  std::string filename = "image.png";
  surface->write_to_png(filename);

  std::cout << "Wrote png file \"" << filename << "\"" << std::endl;

#else

  std::cout
    << "You must compile cairo with PNG support for this example to work."
    << std::endl;

#endif
}

RefPtr<Gdk::Pixbuf> GetAsPixbuf(Cairo::RefPtr<Cairo::ImageSurface> sur)
{
    ASSERT( sur->get_format() == Cairo::FORMAT_ARGB32 );
    return Gdk::Pixbuf::create_from_data((const guint8*)sur->get_data(), 
                                         Gdk::COLORSPACE_RGB,
                                         true, 8, 
                                         sur->get_width(), sur->get_height(), 
                                         sur->get_stride());
}

void CardWidget::Draw(Cairo::RefPtr<Cairo::Context> cr, int x, int y)
{
	bool highlight = highlightOnHover && isMouseInArea;
	Cairo::RefPtr<Cairo::ImageSurface> image = PrefSlots::getImagesStorage().GetCardImage(card);
	cr->save();
	cr->translate(x, y);
	cr->scale(1.0 * width / image->get_width(), 1.0 * height / image->get_height());
	cr->rectangle(0, 0, image->get_width(), image->get_height());
	cr->clip();
	if( highlight ) {
		cr->save();
		cr->set_source_rgb(0.1, 0.8, 0.1);
		cr->paint();
		cr->restore();
	}
	cr->set_source(image, 0, 0);
	cr->paint_with_alpha( highlight ? 0.7 : 1.0 );
	cr->restore();
}

  /** Post-process files. Only valid for PNGs. */
  void postprocess()
  {
    printf("Post-processing PNG files, resizing to %fx%f\n", maxwidth, maxheight);
    struct dirent *d;
    DIR *output_dir = opendir(outdir.c_str());
    while ((d = readdir(output_dir)) != NULL) {
      if (fnmatch("*.png", d->d_name, FNM_PATHNAME | FNM_PERIOD) == 0) {
	infile = outdir + "/" + d->d_name;
	Cairo::RefPtr<Cairo::ImageSurface> imgs = Cairo::ImageSurface::create_from_png(infile);
	if ( (imgs->get_height() != maxheight) || (imgs->get_width() != maxwidth)) {
	  // need to re-create
	  char *tmpout = strdup((outdir + "/tmpXXXXXX").c_str());
	  FILE *f = fdopen(mkstemp(tmpout), "w");
	  outfile = tmpout;
	  free(tmpout);

	  Cairo::RefPtr<Cairo::ImageSurface> outs = Cairo::ImageSurface::create(Cairo::FORMAT_ARGB32,
										(int)ceilf(maxwidth),
										(int)ceilf(maxheight));
	  double tx = (maxwidth  - imgs->get_width()) / 2.0;
	  double ty = (maxheight - imgs->get_height()) / 2.0;
	  printf("Re-creating %s for post-processing, "
		 "resizing from %ix%i, tx=%f, ty=%f\n", infile.c_str(),
		 imgs->get_width(), imgs->get_height(), tx, ty);
	  Cairo::RefPtr<Cairo::Context> cc = Cairo::Context::create(outs);
	  if (white_bg) {
	    cc->set_source_rgb(1, 1, 1);
	    cc->paint();
	  }
	  cc->set_source(imgs, tx, ty);
	  cc->paint();
	  outs->write_to_png(&SkillGuiBatchRenderer::write_func, f);
	  imgs.clear();
	  cc.clear();
	  outs.clear();
	  fclose(f);
	  rename(outfile.c_str(), infile.c_str());
	}
      }
    }
    closedir(output_dir);
  }

void
FourdThumbnailer::receive_frame(Cairo::RefPtr<Cairo::ImageSurface> img, gint64 pos)
{
  if (!m_buffer)
  {
    m_buffer = Cairo::ImageSurface::create(Cairo::FORMAT_RGB24,
                                           img->get_width() * 10,
                                           img->get_height());
  }

  Cairo::RefPtr<Cairo::Context> cr = Cairo::Context::create(m_buffer);

  int slice_width = m_buffer->get_width() / m_slices;
  cr->rectangle((slice_width * m_count), 0,
                slice_width, m_buffer->get_height());
  cr->clip();

  cr->begin_new_path();
  cr->set_source(img, m_count * (m_buffer->get_width() - img->get_width()) / (m_slices-1), 0);
  cr->paint();

  m_count += 1;
}

void GerberImporter::render(Cairo::RefPtr<Cairo::ImageSurface> surface, const guint dpi, const double min_x, const double min_y) throw (import_exception)
{
    gerbv_render_info_t render_info;

    render_info.scaleFactorX = dpi;
    render_info.scaleFactorY = dpi;
    render_info.lowerLeftX = min_x;
    render_info.lowerLeftY = min_y;
    render_info.displayWidth = surface->get_width();
    render_info.displayHeight = surface->get_height();
    render_info.renderType = GERBV_RENDER_TYPE_CAIRO_NORMAL;

    GdkColor color_saturated_white = { 0xFFFFFFFF, 0xFFFF, 0xFFFF, 0xFFFF };
    project->file[0]->color = color_saturated_white;

    cairo_t* cr = cairo_create(surface->cobj());
    gerbv_render_layer_to_cairo_target(cr, project->file[0], &render_info);

    cairo_destroy(cr);

    /// @todo check wheter importing was successful
}

void level_editor::tileset_display::update_tileset(const std::string& level_name) {
  // find the main tileset and draw it first, then the others
  level_editor::tileset_list_type::iterator main_iter;
  level_editor::tileset_list_type::iterator iter, end;
  end = m_preferences.tilesets.end();
  main_iter = m_preferences.tilesets.end();

  for (iter = m_preferences.tilesets.begin();
       iter != end;
       iter ++) {
    // prefix matches level name
    if (iter->main && iter->active && level_name.find(iter->prefix) != std::string::npos) {
      // prefer tilesets with a longer prefix
      if (main_iter == end || main_iter->prefix.size() < iter->prefix.size()) {
        main_iter = iter;
      }
    }
  }
  
  Cairo::RefPtr<Cairo::ImageSurface> main;
  if (main_iter == m_preferences.tilesets.end()) {
    // No matching main tileset, use default image and display error
    // TODO: actually display an error box here
    //std::cerr <<
    //  "No valid tileset found, please add atleast one main tileset to the "
    //  "tileset list that matches the current level." << std::endl;
    main = m_image_cache.get_image("internal/no_img.png");
  } else {
    main = m_image_cache.get_image(main_iter->name);
  }
  //std::cout << "creating surface" << std::endl;
  const int main_width = main->get_width();
  const int main_height = main->get_height();
  m_surface = Cairo::ImageSurface::create(Cairo::FORMAT_ARGB32, main_width, main_height);

  Cairo::RefPtr<Cairo::Context> cr = Cairo::Context::create(m_surface);

  cr->set_source(main, 0, 0);
  cr->paint();

  // now draw the rest
  end = m_preferences.tilesets.end();
  for (iter = m_preferences.tilesets.begin();
       iter != end;
       iter ++) {
    // prefix matches level name
    if (level_name.find(iter->prefix) != std::string::npos && !iter->main) {
      Cairo::RefPtr<Cairo::ImageSurface> ts = m_image_cache.get_image(iter->name);
      // Ignore other matching main tilesets
      if (!iter->main && iter->active) {
        cr->set_source(ts, iter->x, iter->y);
      }
      cr->paint();
    }
  }

  set_size_request(main_width, main_height);

  queue_draw();
  // Fire signal to users
  m_signal_tileset_updated(m_surface);
}