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LibGfx: Avoid AK::Function indirection in FastBoxBlurFilter + flatten it

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This dropped a few percent when profiling Lubrsi's test.
This commit is contained in:
MacDue 2022-06-20 12:23:57 +01:00 committed by Linus Groh
parent bb48a61d50
commit 30a0ed6678
Notes: sideshowbarker 2024-07-17 18:08:55 +09:00 
Author: https://github.com/MacDue
Commit: https://github.com/SerenityOS/serenity/commit/30a0ed6678
Pull-request: https://github.com/SerenityOS/serenity/pull/14343
Reviewed-by: https://github.com/linusg
1 changed files with 26 additions and 23 deletions
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49
Userland/Libraries/LibGfx/Filters/FastBoxBlurFilter.cpp
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@ -33,30 +33,9 @@ void FastBoxBlurFilter::apply_single_pass(size_t radius)
apply_single_pass(radius, radius);
}
// Based on the super fast blur algorithm by Quasimondo, explored here: https://stackoverflow.com/questions/21418892/understanding-super-fast-blur-algorithm
void FastBoxBlurFilter::apply_single_pass(size_t radius_x, size_t radius_y)
template<typename GetPixelFunction, typename SetPixelFunction>
static void do_single_pass(int width, int height, size_t radius_x, size_t radius_y, GetPixelFunction get_pixel_function, SetPixelFunction set_pixel_function)
{
auto format = m_bitmap.format();
VERIFY(format == BitmapFormat::BGRA8888 || format == BitmapFormat::BGRx8888);
Function<Color(int, int)> get_pixel_function;
Function<void(int, int, Color)> set_pixel_function;
switch (format) {
case BitmapFormat::BGRx8888:
get_pixel_function = [&](int x, int y) { return m_bitmap.get_pixel<StorageFormat::BGRx8888>(x, y); };
set_pixel_function = [&](int x, int y, Color color) { return m_bitmap.set_pixel<StorageFormat::BGRx8888>(x, y, color); };
break;
case BitmapFormat::BGRA8888:
get_pixel_function = [&](int x, int y) { return m_bitmap.get_pixel<StorageFormat::BGRA8888>(x, y); };
set_pixel_function = [&](int x, int y, Color color) { return m_bitmap.set_pixel<StorageFormat::BGRA8888>(x, y, color); };
break;
default:
VERIFY_NOT_REACHED();
}
int height = m_bitmap.height();
int width = m_bitmap.width();
int div_x = 2 * radius_x + 1;
int div_y = 2 * radius_y + 1;
@ -149,6 +128,30 @@ void FastBoxBlurFilter::apply_single_pass(size_t radius_x, size_t radius_y)
}
}
// Based on the super fast blur algorithm by Quasimondo, explored here: https://stackoverflow.com/questions/21418892/understanding-super-fast-blur-algorithm
FLATTEN void FastBoxBlurFilter::apply_single_pass(size_t radius_x, size_t radius_y)
{
auto format = m_bitmap.format();
VERIFY(format == BitmapFormat::BGRA8888 || format == BitmapFormat::BGRx8888);
switch (format) {
case BitmapFormat::BGRx8888:
do_single_pass(
m_bitmap.width(), m_bitmap.height(), radius_x, radius_y,
[&](int x, int y) { return m_bitmap.get_pixel<StorageFormat::BGRx8888>(x, y); },
[&](int x, int y, Color color) { return m_bitmap.set_pixel<StorageFormat::BGRx8888>(x, y, color); });
break;
case BitmapFormat::BGRA8888:
do_single_pass(
m_bitmap.width(), m_bitmap.height(), radius_x, radius_y,
[&](int x, int y) { return m_bitmap.get_pixel<StorageFormat::BGRA8888>(x, y); },
[&](int x, int y, Color color) { return m_bitmap.set_pixel<StorageFormat::BGRA8888>(x, y, color); });
break;
default:
VERIFY_NOT_REACHED();
}
}
// Math from here: http://blog.ivank.net/fastest-gaussian-blur.html
void FastBoxBlurFilter::apply_three_passes(size_t radius)
{