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LibGUI: Add a Clipboard API for retrieving a copied Gfx::Bitmap

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The returned bitmap is always going to be a 32-bit RGBA bitmap for now.
In the future we may want to support copy-pasting other formats.
This commit is contained in:
Andreas Kling 2020-09-05 16:52:35 +02:00
parent 2e6d59b7b2
commit 158f3b9362
2 changed files with 44 additions and 1 deletions
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44
Libraries/LibGUI/Clipboard.cpp
View file

@ -120,9 +120,51 @@ void ClipboardServerConnection::handle(const Messages::ClipboardClient::Clipboar
clipboard.on_change(message.mime_type());
}
RefPtr<Gfx::Bitmap> Clipboard::bitmap() const
{
auto clipping = data_and_type();
if (clipping.mime_type != "image/x-serenityos")
return nullptr;
auto width = clipping.metadata.get("width").value_or("0").to_uint();
if (!width.has_value() || width.value() == 0)
return nullptr;
auto height = clipping.metadata.get("height").value_or("0").to_uint();
if (!height.has_value() || height.value() == 0)
return nullptr;
auto pitch = clipping.metadata.get("pitch").value_or("0").to_uint();
if (!pitch.has_value() || pitch.value() == 0)
return nullptr;
auto format = clipping.metadata.get("format").value_or("0").to_uint();
if (!format.has_value() || format.value() == 0)
return nullptr;
auto clipping_bitmap = Gfx::Bitmap::create_wrapper((Gfx::BitmapFormat)format.value(), { (int)width.value(), (int)height.value() }, pitch.value(), (Gfx::RGBA32*)clipping.data.data());
auto bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::RGBA32, { (int)width.value(), (int)height.value() });
for (int y = 0; y < clipping_bitmap->height(); ++y) {
for (int x = 0; x < clipping_bitmap->width(); ++x) {
auto pixel = clipping_bitmap->get_pixel(x, y);
bitmap->set_pixel(x, y, pixel);
}
}
return bitmap;
}
void Clipboard::set_bitmap(const Gfx::Bitmap& bitmap)
{
(void) bitmap;
HashMap<String, String> metadata;
metadata.set("width", String::number(bitmap.width()));
metadata.set("height", String::number(bitmap.height()));
metadata.set("format", String::number((int)bitmap.format()));
metadata.set("pitch", String::number(bitmap.pitch()));
metadata.set("bpp", String::number(bitmap.bpp()));
set_data({ bitmap.scanline(0), bitmap.size_in_bytes() }, "image/x-serenityos", metadata);
}
}

1
Libraries/LibGUI/Clipboard.h
View file

@ -48,6 +48,7 @@ public:
}
void set_bitmap(const Gfx::Bitmap&);
RefPtr<Gfx::Bitmap> bitmap() const;
struct DataAndType {
ByteBuffer data;