Image Image::convertedToFormat (PixelFormat newFormat) const
{
if (image == nullptr || newFormat == image->pixelFormat)
return *this;
const int w = image->width, h = image->height;
const ScopedPointer<ImageType> type (image->createType());
Image newImage (type->create (newFormat, w, h, false));
if (newFormat == SingleChannel)
{
if (! hasAlphaChannel())
{
newImage.clear (getBounds(), Colours::black);
}
else
{
const BitmapData destData (newImage, 0, 0, w, h, BitmapData::writeOnly);
const BitmapData srcData (*this, 0, 0, w, h);
for (int y = 0; y < h; ++y)
{
const PixelARGB* const src = (const PixelARGB*) srcData.getLinePointer (y);
uint8* const dst = destData.getLinePointer (y);
for (int x = 0; x < w; ++x)
dst[x] = src[x].getAlpha();
}
}
}
else if (image->pixelFormat == SingleChannel && newFormat == Image::ARGB)
{
const BitmapData destData (newImage, 0, 0, w, h, BitmapData::writeOnly);
const BitmapData srcData (*this, 0, 0, w, h);
for (int y = 0; y < h; ++y)
{
const PixelAlpha* const src = (const PixelAlpha*) srcData.getLinePointer (y);
PixelARGB* const dst = (PixelARGB*) destData.getLinePointer (y);
for (int x = 0; x < w; ++x)
dst[x].set (src[x]);
}
}
else
{
if (hasAlphaChannel())
newImage.clear (getBounds());
Graphics g (newImage);
g.drawImageAt (*this, 0, 0);
}
return newImage;
}
Image Image::rescaled (const int newWidth, const int newHeight, const Graphics::ResamplingQuality quality) const
{
if (image == nullptr || (image->width == newWidth && image->height == newHeight))
return *this;
const ScopedPointer<ImageType> type (image->createType());
Image newImage (type->create (image->pixelFormat, newWidth, newHeight, hasAlphaChannel()));
Graphics g (newImage);
g.setImageResamplingQuality (quality);
g.drawImage (*this, 0, 0, newWidth, newHeight, 0, 0, image->width, image->height, false);
return newImage;
}
ImagePixelData* clone()
{
jassert (getReferenceCount() > 0); // (This method can't be used on an unowned pointer, as it will end up self-deleting)
const ScopedPointer<ImageType> type (image->createType());
Image newImage (type->create (pixelFormat, area.getWidth(), area.getHeight(), pixelFormat != Image::RGB));
{
Graphics g (newImage);
g.drawImageAt (Image (this), -area.getX(), -area.getY());
}
newImage.getPixelData()->incReferenceCount();
return newImage.getPixelData();
}