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LibGfx: Add a draw_scaled_bitmap() variant that takes a FloatRect as src_rect

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Consider

    draw_scaled_bitmap({0, 0, 10, 10}, source, {0, 0, 5, 5}).

Imagine wanting to split that up into two calls, like e.g. the
compositor when redrawing the background with damage rects. You really
want to be able to say

    draw_scaled_bitmap({0, 0, 5, 10}, source, {0, 0, 2.5, 5})

but up to now you couldn't. Now you can.

This makes painting very low-res images (such as tile.png) in mode
"stretch" work much better.
This commit is contained in:
Nico Weber 2021-01-22 15:13:47 -05:00 • committed by Andreas Kling
parent 7278ff6605
commit 2ec6bbd7a1
4 changed files with 31 additions and 20 deletions
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Userland/Libraries/LibGfx/Painter.h
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@ -62,6 +62,7 @@ public:
void draw_bitmap(const IntPoint&, const CharacterBitmap&, Color = Color());
void draw_bitmap(const IntPoint&, const GlyphBitmap&, Color = Color());
void draw_scaled_bitmap(const IntRect& dst_rect, const Gfx::Bitmap&, const IntRect& src_rect, float opacity = 1.0f);
void draw_scaled_bitmap(const IntRect& dst_rect, const Gfx::Bitmap&, const FloatRect& src_rect, float opacity = 1.0f);
void draw_triangle(const IntPoint&, const IntPoint&, const IntPoint&, Color);
void draw_ellipse_intersecting(const IntRect&, Color, int thickness = 1);
void set_pixel(const IntPoint&, Color);