impeller::Texture Class Reference

#include <texture.h>

Inheritance diagram for impeller::Texture:

Public Member Functions
virtual	~Texture ()
virtual void	SetLabel (std::string_view label)=0
bool	SetContents (const uint8_t *contents, size_t length, size_t slice=0, bool is_opaque=false)
bool	SetContents (std::shared_ptr< const fml::Mapping > mapping, size_t slice=0, bool is_opaque=false)
virtual bool	IsValid () const =0
virtual ISize	GetSize () const =0
bool	IsOpaque () const
size_t	GetMipCount () const
const TextureDescriptor &	GetTextureDescriptor () const
void	SetCoordinateSystem (TextureCoordinateSystem coordinate_system)
TextureCoordinateSystem	GetCoordinateSystem () const
virtual Scalar	GetYCoordScale () const
bool	NeedsMipmapGeneration () const

Protected Member Functions
	Texture (TextureDescriptor desc)
virtual bool	OnSetContents (const uint8_t *contents, size_t length, size_t slice)=0
virtual bool	OnSetContents (std::shared_ptr< const fml::Mapping > mapping, size_t slice)=0

Protected Attributes
bool	mipmap_generated_ = false

Detailed Description

Definition at line 17 of file texture.h.

Constructor & Destructor Documentation

~Texture()

impeller::Texture::~Texture ( )

virtualdefault

Texture()

impeller::Texture::Texture ( TextureDescriptor  desc )

explicitprotected

Definition at line 11 of file texture.cc.

: desc_(desc) {}

Member Function Documentation

GetCoordinateSystem()

TextureCoordinateSystem impeller::Texture::GetCoordinateSystem

(

)

const

Definition at line 77 of file texture.cc.

                                                           {
  return coordinate_system_;
}

GetMipCount()

size_t impeller::Texture::GetMipCount

(

)

const

Definition at line 53 of file texture.cc.

                                  {
  return GetTextureDescriptor().mip_count;
}

GetSize()

virtual ISize impeller::Texture::GetSize ( ) const

pure virtual

Implemented in impeller::TestImpellerTexture, and impeller::TextureVK.

GetTextureDescriptor()

const TextureDescriptor & impeller::Texture::GetTextureDescriptor

(

)

const

Definition at line 57 of file texture.cc.

                                                             {
  return desc_;
}

GetYCoordScale()

Scalar impeller::Texture::GetYCoordScale ( ) const

virtual

Definition at line 81 of file texture.cc.

                                     {
  return 1.0;
}

IsOpaque()

bool impeller::Texture::IsOpaque

(

)

const

Definition at line 49 of file texture.cc.

                             {
  return is_opaque_;
}

IsValid()

virtual bool impeller::Texture::IsValid ( ) const

pure virtual

Implemented in impeller::TextureMTL, and impeller::TestImpellerTexture.

NeedsMipmapGeneration()

bool impeller::Texture::NeedsMipmapGeneration

(

)

const

Returns true if mipmaps have never been generated. The contents of the mipmap may be out of date if the root texture has been modified and the mipmaps hasn't been regenerated.

Definition at line 85 of file texture.cc.

                                          {
  return !mipmap_generated_ && desc_.mip_count > 1;
}

OnSetContents() [1/2]

virtual bool impeller::Texture::OnSetContents ( const uint8_t *  contents, size_t  length, size_t  slice  )

protectedpure virtual

Implemented in impeller::TestImpellerTexture.

OnSetContents() [2/2]

virtual bool impeller::Texture::OnSetContents ( std::shared_ptr< const fml::Mapping >  mapping, size_t  slice  )

protectedpure virtual

Implemented in impeller::TestImpellerTexture.

SetContents() [1/2]

bool impeller::Texture::SetContents	(	const uint8_t *	contents,
		size_t	length,
		size_t	slice = 0,
		bool	is_opaque = false
	)

Definition at line 15 of file texture.cc.

                                          {
  if (!IsSliceValid(slice)) {
    VALIDATION_LOG << "Invalid slice for texture.";
    return false;
  }
  if (!OnSetContents(contents, length, slice)) {
    return false;
  }
  coordinate_system_ = TextureCoordinateSystem::kUploadFromHost;
  is_opaque_ = is_opaque;
  return true;
}

SetContents() [2/2]

bool impeller::Texture::SetContents	(	std::shared_ptr< const fml::Mapping >	mapping,
		size_t	slice = 0,
		bool	is_opaque = false
	)

Definition at line 31 of file texture.cc.

                                          {
  if (!IsSliceValid(slice)) {
    VALIDATION_LOG << "Invalid slice for texture.";
    return false;
  }
  if (!mapping) {
    return false;
  }
  if (!OnSetContents(std::move(mapping), slice)) {
    return false;
  }
  coordinate_system_ = TextureCoordinateSystem::kUploadFromHost;
  is_opaque_ = is_opaque;
  return true;
}

SetCoordinateSystem()

void impeller::Texture::SetCoordinateSystem

(

TextureCoordinateSystem

coordinate_system

)

Update the coordinate system used by the texture.

The setting is used to conditionally invert the coordinates to account for the different origin of GLES textures.

Definition at line 73 of file texture.cc.

                                                                           {
  coordinate_system_ = coordinate_system;
}

SetLabel()

virtual void impeller::Texture::SetLabel ( std::string_view  label )

pure virtual

Implemented in impeller::TestImpellerTexture.

Member Data Documentation

mipmap_generated_

bool impeller::Texture::mipmap_generated_ = false

protected

Definition at line 70 of file texture.h.

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

• impeller/core/texture.h
• impeller/core/texture.cc