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LibGfx: Implement Grayscale/Invert filters as ColorFilter

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This commit is contained in:
Xavier Defrang 2022-01-07 23:45:15 +01:00 • committed by Andreas Kling
parent ff25958b51
commit 2502a88e49
Notes: sideshowbarker 2024-07-17 21:27:19 +09:00
2 changed files with 8 additions and 50 deletions
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29
Userland/Libraries/LibGfx/Filters/GrayscaleFilter.h
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@ -6,40 +6,19 @@
#pragma once
#include <LibGfx/Filters/Filter.h>
#include <LibGfx/Filters/ColorFilter.h>
namespace Gfx {
class GrayscaleFilter : public Filter {
class GrayscaleFilter : public ColorFilter {
public:
GrayscaleFilter() { }
virtual ~GrayscaleFilter() { }
virtual char const* class_name() const override { return "GrayscaleFilter"; }
virtual void apply(Bitmap& target_bitmap, IntRect const& target_rect, Bitmap const& source_bitmap, IntRect const& source_rect) override
{
// source_rect should be describing the pixels that can be accessed
// to apply this filter, while target_rect should describe the area
// where to apply the filter on.
VERIFY(source_rect.size() == target_rect.size());
VERIFY(target_bitmap.rect().contains(target_rect));
VERIFY(source_bitmap.rect().contains(source_rect));
for (auto y = 0; y < source_rect.height(); ++y) {
ssize_t source_y = y + source_rect.y();
ssize_t target_y = y + target_rect.y();
for (auto x = 0; x < source_rect.width(); ++x) {
ssize_t source_x = x + source_rect.x();
ssize_t target_x = x + target_rect.x();
auto source_pixel = source_bitmap.get_pixel(source_x, source_y);
auto target_color = source_pixel.to_grayscale();
target_bitmap.set_pixel(target_x, target_y, target_color);
}
}
}
protected:
Color convert_color(Color original) override { return original.to_grayscale(); };
};
}

29
Userland/Libraries/LibGfx/Filters/InvertFilter.h
View file

@ -6,40 +6,19 @@
#pragma once
#include <LibGfx/Filters/Filter.h>
#include <LibGfx/Filters/ColorFilter.h>
namespace Gfx {
class InvertFilter : public Filter {
class InvertFilter : public ColorFilter {
public:
InvertFilter() { }
virtual ~InvertFilter() { }
virtual char const* class_name() const override { return "InvertFilter"; }
virtual void apply(Bitmap& target_bitmap, IntRect const& target_rect, Bitmap const& source_bitmap, IntRect const& source_rect) override
{
// source_rect should be describing the pixels that can be accessed
// to apply this filter, while target_rect should describe the area
// where to apply the filter on.
VERIFY(source_rect.size() == target_rect.size());
VERIFY(target_bitmap.rect().contains(target_rect));
VERIFY(source_bitmap.rect().contains(source_rect));
for (auto y = 0; y < source_rect.height(); ++y) {
ssize_t source_y = y + source_rect.y();
ssize_t target_y = y + target_rect.y();
for (auto x = 0; x < source_rect.width(); ++x) {
ssize_t source_x = x + source_rect.x();
ssize_t target_x = x + target_rect.x();
auto source_pixel = source_bitmap.get_pixel(source_x, source_y);
auto target_color = source_pixel.inverted();
target_bitmap.set_pixel(target_x, target_y, target_color);
}
}
}
protected:
Color convert_color(Color original) override { return original.inverted(); };
};
}