Carla/source/modules/juce_gui_basics/drawables/juce_DrawableImage.cpp

/*
  ==============================================================================

   This file is part of the JUCE 7 technical preview.
   Copyright (c) 2022 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For the technical preview this file cannot be licensed commercially.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

DrawableImage::DrawableImage() : bounds ({ 0.0f, 0.0f, 1.0f, 1.0f })
{
}

DrawableImage::DrawableImage (const DrawableImage& other)
    : Drawable (other),
      image (other.image),
      opacity (other.opacity),
      overlayColour (other.overlayColour),
      bounds (other.bounds)
{
    setBounds (other.getBounds());
}

DrawableImage::DrawableImage (const Image& imageToUse)
{
    setImageInternal (imageToUse);
}

DrawableImage::~DrawableImage()
{
}

std::unique_ptr<Drawable> DrawableImage::createCopy() const
{
    return std::make_unique<DrawableImage> (*this);
}

//==============================================================================
void DrawableImage::setImage (const Image& imageToUse)
{
    if (setImageInternal (imageToUse))
        repaint();
}

void DrawableImage::setOpacity (const float newOpacity)
{
    opacity = newOpacity;
}

void DrawableImage::setOverlayColour (Colour newOverlayColour)
{
    overlayColour = newOverlayColour;
}

void DrawableImage::setBoundingBox (Rectangle<float> newBounds)
{
    setBoundingBox (Parallelogram<float> (newBounds));
}

void DrawableImage::setBoundingBox (Parallelogram<float> newBounds)
{
    if (bounds != newBounds)
    {
        bounds = newBounds;

        if (image.isValid())
        {
            auto tr = bounds.topLeft + (bounds.topRight   - bounds.topLeft) / (float) image.getWidth();
            auto bl = bounds.topLeft + (bounds.bottomLeft - bounds.topLeft) / (float) image.getHeight();

            auto t = AffineTransform::fromTargetPoints (bounds.topLeft.x, bounds.topLeft.y,
                                                        tr.x, tr.y,
                                                        bl.x, bl.y);

            if (t.isSingularity())
                t = {};

            setTransform (t);
        }
    }
}

//==============================================================================
void DrawableImage::paint (Graphics& g)
{
    if (image.isValid())
    {
        if (opacity > 0.0f && ! overlayColour.isOpaque())
        {
            g.setOpacity (opacity);
            g.drawImageAt (image, 0, 0, false);
        }

        if (! overlayColour.isTransparent())
        {
            g.setColour (overlayColour.withMultipliedAlpha (opacity));
            g.drawImageAt (image, 0, 0, true);
        }
    }
}

Rectangle<float> DrawableImage::getDrawableBounds() const
{
    return image.getBounds().toFloat();
}

bool DrawableImage::hitTest (int x, int y)
{
    return Drawable::hitTest (x, y) && image.isValid() && image.getPixelAt (x, y).getAlpha() >= 127;
}

Path DrawableImage::getOutlineAsPath() const
{
    return {}; // not applicable for images
}

//==============================================================================
bool DrawableImage::setImageInternal (const Image& imageToUse)
{
    if (image != imageToUse)
    {
        image = imageToUse;
        setBounds (image.getBounds());
        setBoundingBox (image.getBounds().toFloat());
        return true;
    }

    return false;
}

//==============================================================================
std::unique_ptr<AccessibilityHandler> DrawableImage::createAccessibilityHandler()
{
    return std::make_unique<AccessibilityHandler> (*this, AccessibilityRole::image);
}

} // namespace juce