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LibGfx: Allow creating a Gfx::Bitmap backed by an anonymous file

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Gfx::Bitmap::create_with_anon_fd() creates such a Bitmap, and also
optionally takes ownership of the file, making sure to close() it
on destruction.
This commit is contained in:
Andreas Kling 2021-01-15 12:09:37 +01:00
parent fb4993f067
commit 4d97b955e6
2 changed files with 50 additions and 0 deletions
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10
Userland/Libraries/LibGfx/Bitmap.h
View file

@ -88,11 +88,17 @@ enum RotationDirection {
class Bitmap : public RefCounted<Bitmap> {
public:
enum class ShouldCloseAnonymousFile {
No,
Yes,
};
static RefPtr<Bitmap> create(BitmapFormat, const IntSize&);
static RefPtr<Bitmap> create_shareable(BitmapFormat, const IntSize&);
static RefPtr<Bitmap> create_purgeable(BitmapFormat, const IntSize&);
static RefPtr<Bitmap> create_wrapper(BitmapFormat, const IntSize&, size_t pitch, void*);
static RefPtr<Bitmap> load_from_file(const StringView& path);
static RefPtr<Bitmap> create_with_anon_fd(BitmapFormat, int anon_fd, const IntSize&, ShouldCloseAnonymousFile);
static RefPtr<Bitmap> create_with_shared_buffer(BitmapFormat, NonnullRefPtr<SharedBuffer>&&, const IntSize&);
static RefPtr<Bitmap> create_with_shared_buffer(BitmapFormat, NonnullRefPtr<SharedBuffer>&&, const IntSize&, const Vector<RGBA32>& palette);
static RefPtr<Bitmap> create_from_serialized_byte_buffer(ByteBuffer&& buffer);
@ -224,6 +230,8 @@ public:
void set_volatile();
[[nodiscard]] bool set_nonvolatile();
int anon_fd() const { return m_anon_fd; }
private:
enum class Purgeable {
No,
@ -232,6 +240,7 @@ private:
Bitmap(BitmapFormat, const IntSize&, Purgeable, const BackingStore&);
Bitmap(BitmapFormat, const IntSize&, size_t pitch, void*);
Bitmap(BitmapFormat, NonnullRefPtr<SharedBuffer>&&, const IntSize&, const Vector<RGBA32>& palette);
Bitmap(BitmapFormat, int anon_fd, const IntSize&, void*);
static Optional<BackingStore> allocate_backing_store(BitmapFormat, const IntSize&, Purgeable);
@ -246,6 +255,7 @@ private:
bool m_purgeable { false };
bool m_volatile { false };
RefPtr<SharedBuffer> m_shared_buffer;
int m_anon_fd { -1 };
};
inline u8* Bitmap::scanline_u8(int y)