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LibGfx: Remove draw_signed_distance_field() in Gfx::Painter
No longer used since we switched to vector paths for checkbox rendering.
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57c735dec4
Notes:
sideshowbarker
2024-07-17 01:53:23 +09:00
Author: https://github.com/kalenikaliaksandr Commit: https://github.com/LadybirdBrowser/ladybird/commit/57c735dec4 Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/152
@ -1637,52 +1637,4 @@ void Painter::draw_scaled_bitmap_with_transform(IntRect const& dst_rect, Bitmap
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}
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}
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void Painter::draw_signed_distance_field(IntRect const& dst_rect, Color color, Gfx::GrayscaleBitmap const& sdf, float smoothing)
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{
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auto target_rect = dst_rect.translated(translation());
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auto clipped_rect = target_rect.intersected(clip_rect());
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if (clipped_rect.is_empty())
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return;
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auto start_offset = clipped_rect.location() - target_rect.location();
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auto x_ratio = static_cast<float>(sdf.width() - 1) / (dst_rect.width() - 1);
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auto y_ratio = static_cast<float>(sdf.height() - 1) / (dst_rect.height() - 1);
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auto smooth_step = [](auto edge0, auto edge1, auto x) {
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x = clamp((x - edge0) / (edge1 - edge0), 0.0f, 1.0f);
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return x * x * (3 - 2 * x);
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};
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auto pixel_at = [&](unsigned x, unsigned y) -> u8 {
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// Returning 255 means this pixel is outside the shape.
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if (x >= sdf.width() || y >= sdf.height())
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return 255;
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return sdf.pixel_at(x, y);
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};
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for (int i = 0; i < clipped_rect.height(); ++i) {
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for (int j = 0; j < clipped_rect.width(); ++j) {
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auto point = IntPoint { j, i };
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auto sample_point = point + start_offset;
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auto target_x = static_cast<int>(x_ratio * sample_point.x());
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auto target_y = static_cast<int>(y_ratio * sample_point.y());
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auto target_fraction_x = (x_ratio * sample_point.x()) - target_x;
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auto target_fraction_y = (y_ratio * sample_point.y()) - target_y;
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auto a = pixel_at(target_x, target_y);
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auto b = pixel_at(target_x + 1, target_y);
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auto c = pixel_at(target_x, target_y + 1);
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auto d = pixel_at(target_x + 1, target_y + 1);
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float distance = (a * (1 - target_fraction_x) * (1 - target_fraction_y)
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+ b * target_fraction_x * (1 - target_fraction_y)
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+ c * (1 - target_fraction_x) * target_fraction_y
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+ d * target_fraction_x * target_fraction_y)
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/ 255.0f;
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u8 alpha = (1 - clamp(smooth_step(0.5f - smoothing, 0.5f + smoothing, distance), 0.0f, 1.0f)) * 255;
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set_physical_pixel(point + clipped_rect.location(), color.with_alpha(alpha), true);
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}
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}
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}
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}
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@ -76,7 +76,6 @@ public:
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void draw_emoji(IntPoint, Gfx::Bitmap const&, Font const&);
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void draw_glyph(FloatPoint, u32, Font const&, Color);
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void draw_glyph_or_emoji(FloatPoint, Utf8CodePointIterator&, Font const&, Color);
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void draw_signed_distance_field(IntRect const& dst_rect, Color, Gfx::GrayscaleBitmap const&, float smoothing);
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enum class CornerOrientation {
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TopLeft,
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