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LibGfx+Everywhere: Change Gfx::Rect to be endpoint exclusive

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Previously, calling `.right()` on a `Gfx::Rect` would return the last
column's coordinate still inside the rectangle, or `left + width - 1`.
This is called 'endpoint inclusive' and does not make a lot of sense for
`Gfx::Rect<float>` where a rectangle of width 5 at position (0, 0) would
return 4 as its right side. This same problem exists for `.bottom()`.

This changes `Gfx::Rect` to be endpoint exclusive, which gives us the
nice property that `width = right - left` and `height = bottom - top`.
It enables us to treat `Gfx::Rect<int>` and `Gfx::Rect<float>` exactly
the same.

All users of `Gfx::Rect` have been updated accordingly.
This commit is contained in:
Jelle Raaijmakers 2023-05-22 00:41:18 +02:00 • committed by Andreas Kling
parent b7f4363791
commit f391ccfe53
88 changed files with 524 additions and 518 deletions
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8
Userland/Libraries/LibSoftGPU/Device.cpp
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@ -231,9 +231,9 @@ ALWAYS_INLINE void Device::rasterize(Gfx::IntRect& render_bounds, CB1 set_covera
// Quad bounds
auto const render_bounds_left = render_bounds.left();
auto const render_bounds_right = render_bounds.right();
auto const render_bounds_right = render_bounds.right() - 1;
auto const render_bounds_top = render_bounds.top();
auto const render_bounds_bottom = render_bounds.bottom();
auto const render_bounds_bottom = render_bounds.bottom() - 1;
auto const qx0 = render_bounds_left & ~1;
auto const qx1 = render_bounds_right & ~1;
auto const qy0 = render_bounds_top & ~1;
@ -678,9 +678,9 @@ void Device::rasterize_triangle(Triangle& triangle)
// Calculate render bounds based on the triangle's vertices
Gfx::IntRect render_bounds;
render_bounds.set_left(min(min(v0.x(), v1.x()), v2.x()) / subpixel_factor);
render_bounds.set_right(max(max(v0.x(), v1.x()), v2.x()) / subpixel_factor);
render_bounds.set_right(max(max(v0.x(), v1.x()), v2.x()) / subpixel_factor + 1);
render_bounds.set_top(min(min(v0.y(), v1.y()), v2.y()) / subpixel_factor);
render_bounds.set_bottom(max(max(v0.y(), v1.y()), v2.y()) / subpixel_factor);
render_bounds.set_bottom(max(max(v0.y(), v1.y()), v2.y()) / subpixel_factor + 1);
// Calculate depth of fragment for fog;
// OpenGL 1.5 chapter 3.10: "An implementation may choose to approximate the