ImageLoader.h 2.6 KB

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  1. /*
  2. * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
  3. * All rights reserved.
  4. *
  5. * Redistribution and use in source and binary forms, with or without
  6. * modification, are permitted provided that the following conditions are met:
  7. *
  8. * 1. Redistributions of source code must retain the above copyright notice, this
  9. * list of conditions and the following disclaimer.
  10. *
  11. * 2. Redistributions in binary form must reproduce the above copyright notice,
  12. * this list of conditions and the following disclaimer in the documentation
  13. * and/or other materials provided with the distribution.
  14. *
  15. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  16. * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17. * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  18. * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  19. * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20. * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  21. * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  22. * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  23. * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25. */
  26. #pragma once
  27. #include <AK/Function.h>
  28. #include <LibCore/Timer.h>
  29. #include <LibWeb/Loader/ImageResource.h>
  30. namespace Web {
  31. class ImageLoader : public ImageResourceClient {
  32. public:
  33. ImageLoader();
  34. void load(const URL&);
  35. const Gfx::Bitmap* bitmap(size_t index) const;
  36. size_t current_frame_index() const { return m_current_frame_index; }
  37. bool has_image() const;
  38. bool has_loaded_or_failed() const { return m_loading_state != LoadingState::Loading; }
  39. void set_visible_in_viewport(bool) const;
  40. unsigned width() const;
  41. unsigned height() const;
  42. Function<void()> on_load;
  43. Function<void()> on_fail;
  44. Function<void()> on_animate;
  45. private:
  46. // ^ImageResourceClient
  47. virtual void resource_did_load() override;
  48. virtual void resource_did_fail() override;
  49. virtual bool is_visible_in_viewport() const override { return m_visible_in_viewport; }
  50. void animate();
  51. enum class LoadingState {
  52. None,
  53. Loading,
  54. Loaded,
  55. Failed,
  56. };
  57. mutable bool m_visible_in_viewport { false };
  58. size_t m_current_frame_index { 0 };
  59. size_t m_loops_completed { 0 };
  60. LoadingState m_loading_state { LoadingState::Loading };
  61. NonnullRefPtr<Core::Timer> m_timer;
  62. };
  63. }