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d01b4327fa
Previously, ImageDecoder::create() would return a NonnullRefPtr and
could not "fail", although the returned decoder may be "invalid" which
you then had to check anyway.
The new interface looks like this:
static RefPtr<Gfx::ImageDecoder> try_create(ReadonlyBytes);
This simplifies ImageDecoder since it no longer has to worry about its
validity. Client code gets slightly clearer as well.
130 lines
3.2 KiB
C++
130 lines
3.2 KiB
C++
/*
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* Copyright (c) 2020, Hüseyin Aslıtürk <asliturk@hotmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/MappedFile.h>
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#include <LibGUI/ImageWidget.h>
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#include <LibGUI/Painter.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/ImageDecoder.h>
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REGISTER_WIDGET(GUI, ImageWidget)
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namespace GUI {
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ImageWidget::ImageWidget(const StringView&)
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: m_timer(Core::Timer::construct())
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{
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set_frame_thickness(0);
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set_frame_shadow(Gfx::FrameShadow::Plain);
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set_frame_shape(Gfx::FrameShape::NoFrame);
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set_auto_resize(true);
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REGISTER_BOOL_PROPERTY("auto_resize", auto_resize, set_auto_resize);
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REGISTER_BOOL_PROPERTY("should_stretch", should_stretch, set_should_stretch);
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}
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ImageWidget::~ImageWidget()
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{
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}
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void ImageWidget::set_bitmap(const Gfx::Bitmap* bitmap)
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{
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if (m_bitmap == bitmap)
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return;
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m_bitmap = bitmap;
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if (m_bitmap && m_auto_resize)
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set_fixed_size(m_bitmap->size());
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update();
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}
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void ImageWidget::set_auto_resize(bool value)
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{
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m_auto_resize = value;
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if (m_bitmap)
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set_fixed_size(m_bitmap->size());
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}
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// Same as ImageViewer::ViewWidget::animate(), you probably want to keep any changes in sync
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void ImageWidget::animate()
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{
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m_current_frame_index = (m_current_frame_index + 1) % m_image_decoder->frame_count();
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const auto& current_frame = m_image_decoder->frame(m_current_frame_index);
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set_bitmap(current_frame.image);
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if (current_frame.duration != m_timer->interval()) {
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m_timer->restart(current_frame.duration);
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}
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if (m_current_frame_index == m_image_decoder->frame_count() - 1) {
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++m_loops_completed;
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if (m_loops_completed > 0 && m_loops_completed == m_image_decoder->loop_count()) {
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m_timer->stop();
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}
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}
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}
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void ImageWidget::load_from_file(const StringView& path)
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{
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auto file_or_error = MappedFile::map(path);
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if (file_or_error.is_error())
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return;
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auto& mapped_file = *file_or_error.value();
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m_image_decoder = Gfx::ImageDecoder::try_create(mapped_file.bytes());
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VERIFY(m_image_decoder);
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auto bitmap = m_image_decoder->bitmap();
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VERIFY(bitmap);
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set_bitmap(bitmap);
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if (m_image_decoder->is_animated() && m_image_decoder->frame_count() > 1) {
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const auto& first_frame = m_image_decoder->frame(0);
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m_timer->set_interval(first_frame.duration);
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m_timer->on_timeout = [this] { animate(); };
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m_timer->start();
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}
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}
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void ImageWidget::mousedown_event(GUI::MouseEvent&)
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{
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if (on_click)
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on_click();
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}
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void ImageWidget::paint_event(PaintEvent& event)
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{
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Frame::paint_event(event);
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if (!m_bitmap) {
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return;
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}
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Painter painter(*this);
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painter.add_clip_rect(event.rect());
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if (m_should_stretch) {
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painter.draw_scaled_bitmap(frame_inner_rect(), *m_bitmap, m_bitmap->rect(), (float)opacity_percent() / 100.0f);
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} else {
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auto location = frame_inner_rect().center().translated(-(m_bitmap->width() / 2), -(m_bitmap->height() / 2));
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painter.blit(location, *m_bitmap, m_bitmap->rect(), (float)opacity_percent() / 100.0f);
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}
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}
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void ImageWidget::set_opacity_percent(int percent)
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{
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if (m_opacity_percent == percent)
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return;
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m_opacity_percent = percent;
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update();
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}
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}
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