70 lines
2.8 KiB
C
70 lines
2.8 KiB
C
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// ----------------------------------------------------------------------------
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// - Open3D: www.open3d.org -
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// ----------------------------------------------------------------------------
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// Copyright (c) 2018-2023 www.open3d.org
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// SPDX-License-Identifier: MIT
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// ----------------------------------------------------------------------------
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#pragma once
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#include "open3d/visualization/gui/Widget.h"
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#include "open3d/visualization/gui/UIImage.h"
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namespace open3d {
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namespace visualization {
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namespace gui {
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class ImageWidget : public Widget {
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using Super = Widget;
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public:
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ImageWidget();
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/// Uses image from the specified path. Each ImageWidget will use one
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/// draw call.
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explicit ImageWidget(const char* image_path);
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/// Uses existing image. Each ImageWidget will use one draw call.
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explicit ImageWidget(std::shared_ptr<geometry::Image> image);
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/// Uses existing image. Each ImageWidget will use one draw call.
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explicit ImageWidget(std::shared_ptr<t::geometry::Image> image);
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/// Uses an existing texture, using texture coordinates
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/// (u0, v0) to (u1, v1). Does not deallocate texture on destruction.
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/// This is useful for using an icon atlas to reduce draw calls.
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explicit ImageWidget(visualization::rendering::TextureHandle texture_id,
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float u0 = 0.0f,
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float v0 = 0.0f,
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float u1 = 1.0f,
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float v1 = 1.0f);
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ImageWidget(std::shared_ptr<UIImage> image);
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~ImageWidget();
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/// Mostly a convenience function for GetUIImage()->UpdateImage().
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/// If 'image' is the same size as the current image, will update the
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/// texture with the contents of 'image'. This is the fastest path for
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/// setting an image, and is recommended if you are displaying video.
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/// If 'image' is a different size, it will allocate a new texture,
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/// which is essentially the same as creating a new UIImage and calling
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/// SetUIImage(). This is the slow path, and may eventually exhaust internal
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/// texture resources.
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void UpdateImage(std::shared_ptr<geometry::Image> image);
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void UpdateImage(std::shared_ptr<t::geometry::Image> image);
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std::shared_ptr<UIImage> GetUIImage() const;
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void SetUIImage(std::shared_ptr<UIImage> image);
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Size CalcPreferredSize(const LayoutContext& context,
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const Constraints& constraints) const override;
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void Layout(const LayoutContext& context) override;
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DrawResult Draw(const DrawContext& context) override;
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private:
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struct Impl;
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std::unique_ptr<Impl> impl_;
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};
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} // namespace gui
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} // namespace visualization
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} // namespace open3d
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