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LibGfx: Add Bitmap::scaled_to_size()

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Nico Weber 2023-10-18 13:29:52 -04:00 • committed by Sam Atkins
parent 3907374621
commit a4dec92ed0
2 changed files with 7 additions and 2 deletions
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8
Userland/Libraries/LibGfx/Bitmap.cpp
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@ -362,7 +362,6 @@ ErrorOr<NonnullRefPtr<Gfx::Bitmap>> Bitmap::scaled(int sx, int sy) const
return new_bitmap; return new_bitmap;
} }
// http://fourier.eng.hmc.edu/e161/lectures/resize/node3.html
ErrorOr<NonnullRefPtr<Gfx::Bitmap>> Bitmap::scaled(float sx, float sy) const ErrorOr<NonnullRefPtr<Gfx::Bitmap>> Bitmap::scaled(float sx, float sy) const
{ {
VERIFY(sx >= 0.0f && sy >= 0.0f); VERIFY(sx >= 0.0f && sy >= 0.0f);
@ -371,8 +370,13 @@ ErrorOr<NonnullRefPtr<Gfx::Bitmap>> Bitmap::scaled(float sx, float sy) const
int scaled_width = (int)ceilf(sx * (float)width()); int scaled_width = (int)ceilf(sx * (float)width());
int scaled_height = (int)ceilf(sy * (float)height()); int scaled_height = (int)ceilf(sy * (float)height());
return scaled_to_size({ scaled_width, scaled_height });
}
auto new_bitmap = TRY(Gfx::Bitmap::create(format(), { scaled_width, scaled_height }, scale())); // http://fourier.eng.hmc.edu/e161/lectures/resize/node3.html
ErrorOr<NonnullRefPtr<Gfx::Bitmap>> Bitmap::scaled_to_size(Gfx::IntSize size) const
{
auto new_bitmap = TRY(Gfx::Bitmap::create(format(), size, scale()));
auto old_width = physical_width(); auto old_width = physical_width();
auto old_height = physical_height(); auto old_height = physical_height();

1
Userland/Libraries/LibGfx/Bitmap.h
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@ -114,6 +114,7 @@ public:
ErrorOr<NonnullRefPtr<Gfx::Bitmap>> flipped(Gfx::Orientation) const; ErrorOr<NonnullRefPtr<Gfx::Bitmap>> flipped(Gfx::Orientation) const;
ErrorOr<NonnullRefPtr<Gfx::Bitmap>> scaled(int sx, int sy) const; ErrorOr<NonnullRefPtr<Gfx::Bitmap>> scaled(int sx, int sy) const;
ErrorOr<NonnullRefPtr<Gfx::Bitmap>> scaled(float sx, float sy) const; ErrorOr<NonnullRefPtr<Gfx::Bitmap>> scaled(float sx, float sy) const;
ErrorOr<NonnullRefPtr<Gfx::Bitmap>> scaled_to_size(Gfx::IntSize) const;
ErrorOr<NonnullRefPtr<Gfx::Bitmap>> cropped(Gfx::IntRect, Optional<BitmapFormat> new_bitmap_format = {}) const; ErrorOr<NonnullRefPtr<Gfx::Bitmap>> cropped(Gfx::IntRect, Optional<BitmapFormat> new_bitmap_format = {}) const;
ErrorOr<NonnullRefPtr<Gfx::Bitmap>> to_bitmap_backed_by_anonymous_buffer() const; ErrorOr<NonnullRefPtr<Gfx::Bitmap>> to_bitmap_backed_by_anonymous_buffer() const;
[[nodiscard]] ErrorOr<ByteBuffer> serialize_to_byte_buffer() const; [[nodiscard]] ErrorOr<ByteBuffer> serialize_to_byte_buffer() const;