impeller::ComposedColorFilter Class Reference

Applies color filters as f(g(x)), where x is the input color. More...

#include <color_filter.h>

Inheritance diagram for impeller::ComposedColorFilter:

Public Member Functions
	ComposedColorFilter (const std::shared_ptr< ColorFilter > &outer, const std::shared_ptr< ColorFilter > &inner)
	~ComposedColorFilter () override
std::shared_ptr< ColorFilterContents >	WrapWithGPUColorFilter (std::shared_ptr< FilterInput > input, ColorFilterContents::AbsorbOpacity absorb_opacity) const override
	Wraps the given filter input with a GPU-based filter that will perform the color operation. The given input will first be rendered to a texture and then filtered.
ColorFilterProc	GetCPUColorFilterProc () const override
	Returns a function that can be used to filter unpremultiplied Impeller Colors on the CPU.
std::shared_ptr< ColorFilter >	Clone () const override
Public Member Functions inherited from impeller::ColorFilter
	ColorFilter ()
virtual	~ColorFilter ()

Additional Inherited Members
Public Types inherited from impeller::ColorFilter
using	ColorFilterProc = std::function< Color(Color)>
Static Public Member Functions inherited from impeller::ColorFilter
static std::shared_ptr< ColorFilter >	MakeBlend (BlendMode blend_mode, Color color)
static std::shared_ptr< ColorFilter >	MakeMatrix (ColorMatrix color_matrix)
static std::shared_ptr< ColorFilter >	MakeSrgbToLinear ()
static std::shared_ptr< ColorFilter >	MakeLinearToSrgb ()
static std::shared_ptr< ColorFilter >	MakeComposed (const std::shared_ptr< ColorFilter > &outer, const std::shared_ptr< ColorFilter > &inner)

Detailed Description

Applies color filters as f(g(x)), where x is the input color.

Definition at line 156 of file color_filter.h.

Constructor & Destructor Documentation

ComposedColorFilter()

impeller::ComposedColorFilter::ComposedColorFilter	(	const std::shared_ptr< ColorFilter > &	outer,
		const std::shared_ptr< ColorFilter > &	inner
	)

Definition at line 158 of file color_filter.cc.

    : outer_(outer), inner_(inner) {}

~ComposedColorFilter()

impeller::ComposedColorFilter::~ComposedColorFilter ( )

overridedefault

Member Function Documentation

Clone()

std::shared_ptr< ColorFilter > impeller::ComposedColorFilter::Clone ( ) const

overridevirtual

Implements impeller::ColorFilter.

Definition at line 186 of file color_filter.cc.

                                                            {
  return std::make_shared<ComposedColorFilter>(outer_, inner_);
}

GetCPUColorFilterProc()

ColorFilter::ColorFilterProc impeller::ComposedColorFilter::GetCPUColorFilterProc ( ) const

overridevirtual

Returns a function that can be used to filter unpremultiplied Impeller Colors on the CPU.

Implements impeller::ColorFilter.

Definition at line 176 of file color_filter.cc.

          {
  return [inner = inner_, outer = outer_](Color color) {
    auto inner_proc = inner->GetCPUColorFilterProc();
    auto outer_proc = outer->GetCPUColorFilterProc();
    return outer_proc(inner_proc(color));
  };
}

WrapWithGPUColorFilter()

std::shared_ptr< ColorFilterContents > impeller::ComposedColorFilter::WrapWithGPUColorFilter ( std::shared_ptr< FilterInput >  input, ColorFilterContents::AbsorbOpacity  absorb_opacity  ) const

overridevirtual

Wraps the given filter input with a GPU-based filter that will perform the color operation. The given input will first be rendered to a texture and then filtered.

Note that this operation has no consideration for the original geometry mask of the filter input. And the entire input texture is treated as color information.

Implements impeller::ColorFilter.

Definition at line 166 of file color_filter.cc.

                                                           {
  std::shared_ptr<FilterContents> inner = inner_->WrapWithGPUColorFilter(
      input, ColorFilterContents::AbsorbOpacity::kNo);
  return outer_->WrapWithGPUColorFilter(FilterInput::Make(inner),
                                        absorb_opacity);
}

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The documentation for this class was generated from the following files:

• impeller/aiks/color_filter.h
• impeller/aiks/color_filter.cc