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LibGfx: Remove clip check in Painter::do_draw_scaled_bitmap

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We were performing a check whether source pixels would fall into a
clipped rect too early. Since we already clamp the resulting source
coordinates to the clipped rect, we can just remove this code.
This commit is contained in:
Jelle Raaijmakers 2023-05-19 01:09:06 +02:00 committed by Andreas Kling
parent 7652dbd983
commit 5031603cdc
Notes: sideshowbarker 2024-07-17 01:27:18 +09:00 
Author: https://github.com/gmta
Commit: https://github.com/SerenityOS/serenity/commit/5031603cdc
Pull-request: https://github.com/SerenityOS/serenity/pull/18921
1 changed files with 0 additions and 6 deletions
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6
Userland/Libraries/LibGfx/Painter.cpp
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@ -1288,19 +1288,13 @@ ALWAYS_INLINE static void do_draw_scaled_bitmap(Gfx::Bitmap& target, IntRect con
i64 vscale = src_rect.height() * shift / dst_rect.height();
i64 src_left = src_rect.left() * shift;
i64 src_top = src_rect.top() * shift;
i64 clipped_src_bottom_shifted = (clipped_src_rect.y() + clipped_src_rect.height()) * shift;
i64 clipped_src_right_shifted = (clipped_src_rect.x() + clipped_src_rect.width()) * shift;
for (int y = clipped_rect.top(); y <= clipped_rect.bottom(); ++y) {
auto* scanline = reinterpret_cast<Color*>(target.scanline(y));
auto desired_y = (y - dst_rect.y()) * vscale + src_top;
if (desired_y < clipped_src_rect.top() || desired_y > clipped_src_bottom_shifted)
continue;
for (int x = clipped_rect.left(); x <= clipped_rect.right(); ++x) {
auto desired_x = (x - dst_rect.x()) * hscale + src_left;
if (desired_x < clipped_src_rect.left() || desired_x > clipped_src_right_shifted)
continue;
Color src_pixel;
if constexpr (scaling_mode == Painter::ScalingMode::BilinearBlend) {