impeller::TextureDescriptor Struct Reference

A lightweight object that describes the attributes of a texture that can then used an allocator to create that texture. More...

#include <texture_descriptor.h>

Public Member Functions
constexpr size_t	GetByteSizeOfBaseMipLevel () const
constexpr size_t	GetByteSizeOfAllMipLevels () const
constexpr size_t	GetBytesPerRow () const
constexpr bool	SamplingOptionsAreValid () const
constexpr bool	operator== (const TextureDescriptor &other) const
constexpr bool	operator!= (const TextureDescriptor &other) const
constexpr bool	IsValid () const

Public Attributes
StorageMode	storage_mode = StorageMode::kDeviceTransient
TextureType	type = TextureType::kTexture2D
PixelFormat	format = PixelFormat::kUnknown
ISize	size
size_t	mip_count = 1u
TextureUsageMask	usage = TextureUsage::kShaderRead
SampleCount	sample_count = SampleCount::kCount1
CompressionType	compression_type = CompressionType::kLossless

Detailed Description

A lightweight object that describes the attributes of a texture that can then used an allocator to create that texture.

Definition at line 38 of file texture_descriptor.h.

Member Function Documentation

GetByteSizeOfAllMipLevels()

constexpr size_t impeller::TextureDescriptor::GetByteSizeOfAllMipLevels ( ) const

inlineconstexpr

Definition at line 55 of file texture_descriptor.h.

                                                     {
    if (!IsValid()) {
      return 0u;
    }
    size_t result = 0u;
    int64_t width = size.width;
    int64_t height = size.height;
    for (auto i = 0u; i < mip_count; i++) {
      result +=
          ISize(width, height).Area() * BytesPerPixelForPixelFormat(format);
      width /= 2;
      height /= 2;
    }
    return result;
  }

References impeller::TSize< T >::Area(), impeller::BytesPerPixelForPixelFormat(), format, impeller::TSize< T >::height, IsValid(), mip_count, size, and impeller::TSize< T >::width.

GetByteSizeOfBaseMipLevel()

constexpr size_t impeller::TextureDescriptor::GetByteSizeOfBaseMipLevel ( ) const

inlineconstexpr

Definition at line 48 of file texture_descriptor.h.

                                                     {
    if (!IsValid()) {
      return 0u;
    }
    return size.Area() * BytesPerPixelForPixelFormat(format);
  }

References impeller::TSize< T >::Area(), impeller::BytesPerPixelForPixelFormat(), format, IsValid(), and size.

Referenced by impeller::testing::TEST_P(), impeller::UploadGlyphTextureAtlas(), and impeller::TextureMTL::~TextureMTL().

GetBytesPerRow()

constexpr size_t impeller::TextureDescriptor::GetBytesPerRow ( ) const

inlineconstexpr

Definition at line 71 of file texture_descriptor.h.

                                          {
    if (!IsValid()) {
      return 0u;
    }
    return size.width * BytesPerPixelForPixelFormat(format);
  }

References impeller::BytesPerPixelForPixelFormat(), format, IsValid(), size, and impeller::TSize< T >::width.

IsValid()

constexpr bool impeller::TextureDescriptor::IsValid ( ) const

inlineconstexpr

Definition at line 98 of file texture_descriptor.h.

                                 {
    return format != PixelFormat::kUnknown &&  //
           !size.IsEmpty() &&                  //
           mip_count >= 1u &&                  //
           SamplingOptionsAreValid();
  }

References format, impeller::TSize< T >::IsEmpty(), impeller::kUnknown, mip_count, SamplingOptionsAreValid(), and size.

Referenced by GetByteSizeOfAllMipLevels(), GetByteSizeOfBaseMipLevel(), GetBytesPerRow(), impeller::TextureMTL::TextureMTL(), and impeller::ToMTLTextureDescriptor().

operator!=()

constexpr bool impeller::TextureDescriptor::operator!= ( const TextureDescriptor &  other ) const

inlineconstexpr

Definition at line 94 of file texture_descriptor.h.

                                                                  {
    return !(*this == other);
  }

operator==()

constexpr bool impeller::TextureDescriptor::operator== ( const TextureDescriptor &  other ) const

inlineconstexpr

Definition at line 83 of file texture_descriptor.h.

                                                                  {
    return size == other.size &&                          //
           storage_mode == other.storage_mode &&          //
           format == other.format &&                      //
           usage == other.usage &&                        //
           sample_count == other.sample_count &&          //
           type == other.type &&                          //
           compression_type == other.compression_type &&  //
           mip_count == other.mip_count;
  }

References compression_type, format, mip_count, sample_count, size, storage_mode, type, and usage.

SamplingOptionsAreValid()

constexpr bool impeller::TextureDescriptor::SamplingOptionsAreValid ( ) const

inlineconstexpr

Definition at line 78 of file texture_descriptor.h.

                                                 {
    const auto count = static_cast<uint64_t>(sample_count);
    return IsMultisampleCapable(type) ? count > 1 : count == 1;
  }

References impeller::IsMultisampleCapable(), sample_count, and type.

Referenced by IsValid().

Member Data Documentation

compression_type

CompressionType impeller::TextureDescriptor::compression_type = CompressionType::kLossless

Definition at line 46 of file texture_descriptor.h.

Referenced by impeller::AllocatedTextureSourceVK::AllocatedTextureSourceVK(), impeller::RenderTargetAllocator::CreateOffscreenMSAA(), impeller::interop::ImpellerTextureCreateWithContentsNew(), impeller::interop::ImpellerTextureCreateWithOpenGLTextureHandleNew(), operator==(), impeller::testing::TEST(), impeller::TextureDescriptorToString(), impeller::ToSwapchainTextureDescriptor(), impeller::ToTextureDescriptor(), and impeller::WrapTextureWithRenderTarget().

format

PixelFormat impeller::TextureDescriptor::format = PixelFormat::kUnknown

Definition at line 41 of file texture_descriptor.h.

Referenced by impeller::AllocatedTextureSourceVK::AllocatedTextureSourceVK(), impeller::ContentContext::ContentContext(), impeller::TypographerContextSkia::CreateGlyphAtlas(), impeller::CreateGradientTexture(), impeller::RenderTargetAllocator::CreateOffscreen(), impeller::RenderTargetAllocator::CreateOffscreenMSAA(), impeller::testing::CreateTestYUVTextures(), GetByteSizeOfAllMipLevels(), GetByteSizeOfBaseMipLevel(), GetBytesPerRow(), impeller::interop::ImpellerTextureCreateWithContentsNew(), impeller::interop::ImpellerTextureCreateWithOpenGLTextureHandleNew(), IsValid(), impeller::KHRSwapchainImageVK::KHRSwapchainImageVK(), operator==(), impeller::TextureSourceVK::SetLayout(), impeller::RenderTarget::SetupDepthStencilAttachments(), impeller::testing::TEST(), impeller::testing::TEST_P(), impeller::TextureDescriptorToString(), impeller::ToMTLTextureDescriptor(), impeller::ToSwapchainTextureDescriptor(), impeller::ToTextureDescriptor(), impeller::UploadGlyphTextureAtlas(), impeller::SurfaceGLES::WrapFBO(), impeller::SurfaceVK::WrapSwapchainImage(), impeller::WrapTextureMTL(), and impeller::WrapTextureWithRenderTarget().

mip_count

size_t impeller::TextureDescriptor::mip_count = 1u

Definition at line 43 of file texture_descriptor.h.

Referenced by impeller::AllocatedTextureSourceVK::AllocatedTextureSourceVK(), impeller::SamplerGLES::ConfigureBoundTexture(), impeller::RenderTargetAllocator::CreateOffscreen(), impeller::RenderTargetAllocator::CreateOffscreenMSAA(), impeller::Allocator::CreateTexture(), GetByteSizeOfAllMipLevels(), impeller::Texture::GetMipCount(), impeller::interop::ImpellerTextureCreateWithContentsNew(), impeller::interop::ImpellerTextureCreateWithOpenGLTextureHandleNew(), IsValid(), impeller::KHRSwapchainImageVK::KHRSwapchainImageVK(), impeller::Texture::NeedsMipmapGeneration(), operator==(), impeller::TextureSourceVK::SetLayout(), impeller::testing::TEST(), impeller::testing::TEST_P(), impeller::TextureDescriptorToString(), impeller::ToMTLTextureDescriptor(), impeller::ToSwapchainTextureDescriptor(), and impeller::ToTextureDescriptor().

sample_count

SampleCount impeller::TextureDescriptor::sample_count = SampleCount::kCount1

Definition at line 45 of file texture_descriptor.h.

Referenced by impeller::AllocatedTextureSourceVK::AllocatedTextureSourceVK(), impeller::RenderTargetAllocator::CreateOffscreenMSAA(), operator==(), SamplingOptionsAreValid(), impeller::RenderTarget::SetupDepthStencilAttachments(), impeller::testing::TEST(), impeller::testing::TEST_P(), impeller::TextureDescriptorToString(), impeller::ToMTLTextureDescriptor(), impeller::ToSwapchainTextureDescriptor(), impeller::ToTextureDescriptor(), impeller::SurfaceGLES::WrapFBO(), impeller::SurfaceVK::WrapSwapchainImage(), and impeller::WrapTextureWithRenderTarget().

size

ISize impeller::TextureDescriptor::size

Definition at line 42 of file texture_descriptor.h.

Referenced by impeller::AllocatedTextureSourceVK::AllocatedTextureSourceVK(), impeller::glvk::Trampoline::BlitTextureOpenGLToVulkan(), impeller::ContentContext::ContentContext(), impeller::TypographerContextSkia::CreateGlyphAtlas(), impeller::CreateGradientTexture(), impeller::RenderTargetAllocator::CreateOffscreen(), impeller::RenderTargetAllocator::CreateOffscreenMSAA(), impeller::testing::CreateTestYUVTextures(), impeller::Allocator::CreateTexture(), GetByteSizeOfAllMipLevels(), GetByteSizeOfBaseMipLevel(), GetBytesPerRow(), impeller::TextureVK::GetSize(), impeller::interop::ImpellerTextureCreateWithContentsNew(), impeller::interop::ImpellerTextureCreateWithOpenGLTextureHandleNew(), IsValid(), operator==(), impeller::RenderTarget::SetupDepthStencilAttachments(), impeller::testing::TEST(), impeller::testing::TEST_P(), impeller::TextureDescriptorToString(), impeller::TextureMTL::TextureMTL(), impeller::ToMTLTextureDescriptor(), impeller::ToSwapchainTextureDescriptor(), impeller::ToTextureDescriptor(), impeller::UploadGlyphTextureAtlas(), impeller::SurfaceGLES::WrapFBO(), impeller::SurfaceVK::WrapSwapchainImage(), and impeller::WrapTextureWithRenderTarget().

storage_mode

StorageMode impeller::TextureDescriptor::storage_mode = StorageMode::kDeviceTransient

Definition at line 39 of file texture_descriptor.h.

Referenced by impeller::AllocatedTextureSourceVK::AllocatedTextureSourceVK(), impeller::ContentContext::ContentContext(), impeller::TypographerContextSkia::CreateGlyphAtlas(), impeller::CreateGradientTexture(), impeller::RenderTargetAllocator::CreateOffscreen(), impeller::RenderTargetAllocator::CreateOffscreenMSAA(), impeller::testing::CreateTestYUVTextures(), impeller::Playground::CreateTextureCubeForFixture(), impeller::CreateTextureForDecompressedImage(), ImGui_ImplImpeller_Init(), impeller::interop::ImpellerTextureCreateWithContentsNew(), impeller::interop::ImpellerTextureCreateWithOpenGLTextureHandleNew(), operator==(), impeller::RenderTarget::SetupDepthStencilAttachments(), impeller::testing::TEST(), impeller::testing::TEST_P(), impeller::TextureDescriptorToString(), impeller::ToSwapchainTextureDescriptor(), impeller::ToTextureDescriptor(), impeller::UploadGlyphTextureAtlas(), impeller::SurfaceGLES::WrapFBO(), impeller::SurfaceVK::WrapSwapchainImage(), impeller::WrapTextureWithRenderTarget(), and impeller::TextureMTL::~TextureMTL().

type

TextureType impeller::TextureDescriptor::type = TextureType::kTexture2D

Definition at line 40 of file texture_descriptor.h.

Referenced by impeller::AllocatedTextureSourceVK::AllocatedTextureSourceVK(), impeller::SamplerGLES::ConfigureBoundTexture(), impeller::RenderTargetAllocator::CreateOffscreenMSAA(), impeller::TextureGLES::GenerateMipmap(), impeller::interop::ImpellerTextureCreateWithContentsNew(), impeller::interop::ImpellerTextureCreateWithOpenGLTextureHandleNew(), impeller::KHRSwapchainImageVK::KHRSwapchainImageVK(), operator==(), SamplingOptionsAreValid(), impeller::TextureSourceVK::SetLayout(), impeller::RenderTarget::SetupDepthStencilAttachments(), impeller::testing::TEST(), impeller::testing::TEST_P(), impeller::TextureDescriptorToString(), impeller::ToMTLTextureDescriptor(), impeller::ToSwapchainTextureDescriptor(), impeller::ToTextureDescriptor(), impeller::SurfaceGLES::WrapFBO(), impeller::SurfaceVK::WrapSwapchainImage(), and impeller::WrapTextureWithRenderTarget().

usage

TextureUsageMask impeller::TextureDescriptor::usage = TextureUsage::kShaderRead

Definition at line 44 of file texture_descriptor.h.

Referenced by impeller::AllocatedTextureSourceVK::AllocatedTextureSourceVK(), impeller::TypographerContextSkia::CreateGlyphAtlas(), impeller::RenderTargetAllocator::CreateOffscreen(), impeller::RenderTargetAllocator::CreateOffscreenMSAA(), impeller::interop::ImpellerTextureCreateWithContentsNew(), impeller::interop::ImpellerTextureCreateWithOpenGLTextureHandleNew(), operator==(), impeller::RenderTarget::SetupDepthStencilAttachments(), impeller::testing::TEST_P(), impeller::ToMTLTextureDescriptor(), impeller::ToSwapchainTextureDescriptor(), impeller::ToTextureDescriptor(), impeller::SurfaceGLES::WrapFBO(), impeller::SurfaceVK::WrapSwapchainImage(), and impeller::WrapTextureWithRenderTarget().

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The documentation for this struct was generated from the following file:

• impeller/core/texture_descriptor.h