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PixelPaint: Display an error message if exporting to PNG/BMP fails

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This commit is contained in:
Andreas Kling 2021-06-15 11:30:34 +02:00
parent ba807c2d44
commit 91100f2f94
3 changed files with 53 additions and 27 deletions
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56
Userland/Applications/PixelPaint/Image.cpp
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@ -55,7 +55,7 @@ Image::Image(Gfx::IntSize const& size)
{
}
void Image::paint_into(GUI::Painter& painter, Gfx::IntRect const& dest_rect)
void Image::paint_into(GUI::Painter& painter, Gfx::IntRect const& dest_rect) const
{
float scale = (float)dest_rect.width() / (float)rect().width();
Gfx::PainterStateSaver saver(painter);
@ -188,30 +188,52 @@ Result<void, String> Image::write_to_file(const String& file_path) const
return {};
}
void Image::export_bmp(String const& file_path)
RefPtr<Gfx::Bitmap> Image::try_compose_bitmap() const
{
auto bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::BGRx8888, m_size);
if (!bitmap)
return nullptr;
GUI::Painter painter(*bitmap);
paint_into(painter, { 0, 0, m_size.width(), m_size.height() });
Gfx::BMPWriter dumper;
auto bmp = dumper.dump(bitmap);
auto file = fopen(file_path.characters(), "wb");
fwrite(bmp.data(), sizeof(u8), bmp.size(), file);
fclose(file);
return bitmap;
}
void Image::export_png(String const& file_path)
Result<void, String> Image::export_bmp_to_file(String const& file_path)
{
auto bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::BGRA8888, m_size);
VERIFY(bitmap);
GUI::Painter painter(*bitmap);
paint_into(painter, { 0, 0, m_size.width(), m_size.height() });
auto file_or_error = Core::File::open(file_path, (Core::OpenMode)(Core::OpenMode::WriteOnly | Core::OpenMode::Truncate));
if (file_or_error.is_error())
return file_or_error.error();
auto png = Gfx::PNGWriter::encode(*bitmap);
auto file = fopen(file_path.characters(), "wb");
fwrite(png.data(), sizeof(u8), png.size(), file);
fclose(file);
auto bitmap = try_compose_bitmap();
if (!bitmap)
return String { "Failed to allocate bitmap for encoding"sv };
Gfx::BMPWriter dumper;
auto encoded_data = dumper.dump(bitmap);
auto& file = *file_or_error.value();
if (!file.write(encoded_data.data(), encoded_data.size()))
return String { "Failed to write encoded BMP data to file"sv };
return {};
}
Result<void, String> Image::export_png_to_file(String const& file_path)
{
auto file_or_error = Core::File::open(file_path, (Core::OpenMode)(Core::OpenMode::WriteOnly | Core::OpenMode::Truncate));
if (file_or_error.is_error())
return file_or_error.error();
auto bitmap = try_compose_bitmap();
if (!bitmap)
return String { "Failed to allocate bitmap for encoding"sv };
auto encoded_data = Gfx::PNGWriter::encode(*bitmap);
auto& file = *file_or_error.value();
if (!file.write(encoded_data.data(), encoded_data.size()))
return String { "Failed to write encoded PNG data to file"sv };
return {};
}
void Image::add_layer(NonnullRefPtr<Layer> layer)