LibGfx: Remove draw_signed_distance_field() in Gfx::Painter

No longer used since we switched to vector paths for checkbox rendering.

Userland/Libraries/LibGfx/Painter.cpp

@@ -1637,52 +1637,4 @@ void Painter::draw_scaled_bitmap_with_transform(IntRect const& dst_rect, Bitmap
     }
 }
 
-void Painter::draw_signed_distance_field(IntRect const& dst_rect, Color color, Gfx::GrayscaleBitmap const& sdf, float smoothing)
-{
-    auto target_rect = dst_rect.translated(translation());
-    auto clipped_rect = target_rect.intersected(clip_rect());
-    if (clipped_rect.is_empty())
-        return;
-    auto start_offset = clipped_rect.location() - target_rect.location();
-    auto x_ratio = static_cast<float>(sdf.width() - 1) / (dst_rect.width() - 1);
-    auto y_ratio = static_cast<float>(sdf.height() - 1) / (dst_rect.height() - 1);
-
-    auto smooth_step = [](auto edge0, auto edge1, auto x) {
-        x = clamp((x - edge0) / (edge1 - edge0), 0.0f, 1.0f);
-        return x * x * (3 - 2 * x);
-    };
-
-    auto pixel_at = [&](unsigned x, unsigned y) -> u8 {
-        // Returning 255 means this pixel is outside the shape.
-        if (x >= sdf.width() || y >= sdf.height())
-            return 255;
-        return sdf.pixel_at(x, y);
-    };
-
-    for (int i = 0; i < clipped_rect.height(); ++i) {
-        for (int j = 0; j < clipped_rect.width(); ++j) {
-            auto point = IntPoint { j, i };
-            auto sample_point = point + start_offset;
-            auto target_x = static_cast<int>(x_ratio * sample_point.x());
-            auto target_y = static_cast<int>(y_ratio * sample_point.y());
-            auto target_fraction_x = (x_ratio * sample_point.x()) - target_x;
-            auto target_fraction_y = (y_ratio * sample_point.y()) - target_y;
-
-            auto a = pixel_at(target_x, target_y);
-            auto b = pixel_at(target_x + 1, target_y);
-            auto c = pixel_at(target_x, target_y + 1);
-            auto d = pixel_at(target_x + 1, target_y + 1);
-
-            float distance = (a * (1 - target_fraction_x) * (1 - target_fraction_y)
-                                 + b * target_fraction_x * (1 - target_fraction_y)
-                                 + c * (1 - target_fraction_x) * target_fraction_y
-                                 + d * target_fraction_x * target_fraction_y)
-                / 255.0f;
-
-            u8 alpha = (1 - clamp(smooth_step(0.5f - smoothing, 0.5f + smoothing, distance), 0.0f, 1.0f)) * 255;
-            set_physical_pixel(point + clipped_rect.location(), color.with_alpha(alpha), true);
-        }
-    }
-}
-
 }

Userland/Libraries/LibGfx/Painter.h

@@ -76,7 +76,6 @@ public:
     void draw_emoji(IntPoint, Gfx::Bitmap const&, Font const&);
     void draw_glyph(FloatPoint, u32, Font const&, Color);
     void draw_glyph_or_emoji(FloatPoint, Utf8CodePointIterator&, Font const&, Color);
-    void draw_signed_distance_field(IntRect const& dst_rect, Color, Gfx::GrayscaleBitmap const&, float smoothing);
 
     enum class CornerOrientation {
         TopLeft,