C++ DrawingContext::set_drawing_effect方法代码示例

void
BadGuy::draw(DrawingContext& context)
{
  if(!sprite.get())
    return;
  if(state == STATE_INIT || state == STATE_INACTIVE)
    return;
  if(state == STATE_FALLING) {
    DrawingEffect old_effect = context.get_drawing_effect();
    context.set_drawing_effect(old_effect | VERTICAL_FLIP);
    sprite->draw(context, get_pos(), layer);
    context.set_drawing_effect(old_effect);
  } else {
    sprite->draw(context, get_pos(), layer);
  }
}

void
TileMap::draw(DrawingContext& context)
{
  // skip draw if current opacity is 0.0
  if (current_alpha == 0.0) return;

  context.push_transform();
  if(draw_target != DrawingContext::NORMAL) {
    context.push_target();
    context.set_target(draw_target);
  }

  if(drawing_effect != 0) context.set_drawing_effect(drawing_effect);

  if (editor_active) {
    if(current_alpha != 1.0) {
      context.set_alpha(current_alpha);
    }
  } else {
    context.set_alpha(current_alpha/2);
  }

  /* Force the translation to be an integer so that the tiles appear sharper.
   * For consistency (i.e., to avoid 1-pixel gaps), this needs to be done even
   * for solid tilemaps that are guaranteed to have speed 1.
   * FIXME Force integer translation for all graphics, not just tilemaps. */
  float trans_x = roundf(context.get_translation().x);
  float trans_y = roundf(context.get_translation().y);
  context.set_translation(Vector(int(trans_x * speed_x),
                                 int(trans_y * speed_y)));

  Rectf draw_rect = Rectf(context.get_translation(),
        context.get_translation() + Vector(SCREEN_WIDTH, SCREEN_HEIGHT));
  Rect t_draw_rect = get_tiles_overlapping(draw_rect);
  Vector start = get_tile_position(t_draw_rect.left, t_draw_rect.top);

  Vector pos;
  int tx, ty;

  for(pos.x = start.x, tx = t_draw_rect.left; tx < t_draw_rect.right; pos.x += 32, ++tx) {
    for(pos.y = start.y, ty = t_draw_rect.top; ty < t_draw_rect.bottom; pos.y += 32, ++ty) {
      int index = ty*width + tx;
      assert (index >= 0);
      assert (index < (width * height));

      if (tiles[index] == 0) continue;
      const Tile* tile = tileset->get(tiles[index]);
      assert(tile != 0);
      tile->draw(context, pos, z_pos);
    } /* for (pos y) */
  } /* for (pos x) */

  if(draw_target != DrawingContext::NORMAL) {
    context.pop_target();
  }
  context.pop_transform();
}

void
TileMap::draw(DrawingContext& context)
{
  // skip draw if current opacity is 0.0
  if (current_alpha == 0.0) return;

  context.push_transform();
  if(draw_target != DrawingContext::NORMAL) {
    context.push_target();
    context.set_target(draw_target);
  }

  if(drawing_effect != 0) context.set_drawing_effect(drawing_effect);
  if(current_alpha != 1.0) context.set_alpha(current_alpha);

  /* Force the translation to be an integer so that the tiles appear sharper.
   * For consistency (i.e., to avoid 1-pixel gaps), this needs to be done even
   * for solid tilemaps that are guaranteed to have speed 1.
   * FIXME Force integer translation for all graphics, not just tilemaps. */
  float trans_x = roundf(context.get_translation().x);
  float trans_y = roundf(context.get_translation().y);
  context.set_translation(Vector(int(trans_x * speed_x),
                                 int(trans_y * speed_y)));

  Rectf draw_rect = Rectf(context.get_translation(),
        context.get_translation() + Vector(SCREEN_WIDTH, SCREEN_HEIGHT));
  Rect t_draw_rect = get_tiles_overlapping(draw_rect);

  // Make sure the tilemap is within draw view
  if (t_draw_rect.is_valid()) {
    Vector start = get_tile_position(t_draw_rect.left, t_draw_rect.top);

    Vector pos;
    int tx, ty;

    for(pos.x = start.x, tx = t_draw_rect.left; tx < t_draw_rect.right; pos.x += 32, ++tx) {
      for(pos.y = start.y, ty = t_draw_rect.top; ty < t_draw_rect.bottom; pos.y += 32, ++ty) {
        int index = ty*width + tx;
        assert (index >= 0);
        assert (index < (width * height));

        if (tiles[index] == 0) continue;
        const Tile* tile = tileset->get(tiles[index]);
        assert(tile != 0);

        tile->draw(context, pos, z_pos, current_tint);
      } /* for (pos y) */
    } /* for (pos x) */

    /* Make sure that tiles with images larger than 32x32 that overlap
     * the draw rect will be drawn, even if their tile position does
     * not fall within the draw rect. */
    static const int EXTENDING_TILES = 32;
    int ex_left = std::max(0, t_draw_rect.left-EXTENDING_TILES);
    int ex_top = std::max(0, t_draw_rect.top-EXTENDING_TILES);
    Vector ex_start = get_tile_position(ex_left, ex_top);

    for (pos.x = start.x, tx = t_draw_rect.left; tx < t_draw_rect.right; pos.x += 32, ++tx) {
      for (pos.y = ex_start.y, ty = ex_top; ty < t_draw_rect.top; pos.y += 32, ++ty) {
        int index = ty*width + tx;
        assert (index >= 0);
        assert (index < (width * height));

        if (tiles[index] == 0) continue;
        const Tile* tile = tileset->get(tiles[index]);
        assert(tile != 0);

        SurfacePtr image = tile->get_current_image();
        if (image) {
          int h = image->get_height();
          if (h <= 32) continue;

          if (pos.y + h > start.y)
            tile->draw(context, pos, z_pos, current_tint);
        }
      }
    }

    for (pos.x = ex_start.x, tx = ex_left; tx < t_draw_rect.right; pos.x += 32, ++tx) {
      for(pos.y = ex_start.y, ty = ex_top; ty < t_draw_rect.bottom; pos.y += 32, ++ty) {
        int index = ty*width + tx;
        assert (index >= 0);
        assert (index < (width * height));

        if (tiles[index] == 0) continue;
        const Tile* tile = tileset->get(tiles[index]);
        assert(tile != 0);

        SurfacePtr image = tile->get_current_image();
        if (image) {
          int w = image->get_width();
          int h = image->get_height();
          if (w <= 32 && h <= 32) continue;

          if (pos.x + w > start.x && pos.y + h > start.y)
            tile->draw(context, pos, z_pos, current_tint);
        }
      }
    }
  }
//.........这里部分代码省略.........