A descriptor use to specify hardware buffer allocations. More...

#include <hardware_buffer.h>

Public Member Functions
bool	IsAllocatable () const
	If hardware buffers can be created using this descriptor. Allocatable descriptors may still cause failing allocations in case of resource exhaustion. More...

constexpr bool	operator== (const HardwareBufferDescriptor &o) const

constexpr bool	operator!= (const HardwareBufferDescriptor &o) const

Static Public Member Functions
static HardwareBufferDescriptor	MakeForSwapchainImage (const ISize &size)
	Create a descriptor of the given size that is suitable for use as a swapchain image. More...

Public Attributes
HardwareBufferFormat	format = HardwareBufferFormat::kR8G8B8A8UNormInt

ISize	size

HardwareBufferUsage	usage = HardwareBufferUsageFlags::kNone

Detailed Description

A descriptor use to specify hardware buffer allocations.

Definition at line 47 of file hardware_buffer.h.

Member Function Documentation

◆ IsAllocatable()

bool impeller::android::HardwareBufferDescriptor::IsAllocatable ( ) const

If hardware buffers can be created using this descriptor. Allocatable descriptors may still cause failing allocations in case of resource exhaustion.

Returns: true if allocatable (unless resource exhaustion).

Definition at line 52 of file hardware_buffer.cc.

                                                   {
  const auto desc = ToAHardwareBufferDesc(*this);
  return GetProcTable().AHardwareBuffer_isSupported(&desc) != 0u;
}

◆ MakeForSwapchainImage()

HardwareBufferDescriptor impeller::android::HardwareBufferDescriptor::MakeForSwapchainImage ( const ISize & size )

static

Create a descriptor of the given size that is suitable for use as a swapchain image.

Warning: Descriptors of zero size are not allocatable. The next best valid size is picked. So make sure to check the actual size of the descriptor after this call is made to determine the size of the allocated hardware buffer.

Parameters

[in] size The size. See the restrictions about valid sizes above.

Returns: The hardware buffer descriptor.

Definition at line 87 of file hardware_buffer.cc.

                       {
  HardwareBufferDescriptor desc;
  desc.format = HardwareBufferFormat::kR8G8B8A8UNormInt;
  // Zero sized hardware buffers cannot be allocated.
  desc.size = size.Max(ISize{1u, 1u});
  desc.usage = HardwareBufferUsageFlags::kFrameBufferAttachment |
               HardwareBufferUsageFlags::kCompositorOverlay |
               HardwareBufferUsageFlags::kSampledImage;
  return desc;
}

◆ operator!=()

constexpr bool impeller::android::HardwareBufferDescriptor::operator!= ( const HardwareBufferDescriptor & o ) const

inlineconstexpr

Definition at line 80 of file hardware_buffer.h.

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

◆ operator==()

constexpr bool impeller::android::HardwareBufferDescriptor::operator== ( const HardwareBufferDescriptor & o ) const

inlineconstexpr

Definition at line 76 of file hardware_buffer.h.

                                                                     {
    return format == o.format && size == o.size && usage == o.usage;
  }

Member Data Documentation

◆ format

HardwareBufferFormat impeller::android::HardwareBufferDescriptor::format = HardwareBufferFormat::kR8G8B8A8UNormInt

Definition at line 48 of file hardware_buffer.h.

◆ size

ISize impeller::android::HardwareBufferDescriptor::size

Definition at line 49 of file hardware_buffer.h.

◆ usage

HardwareBufferUsage impeller::android::HardwareBufferDescriptor::usage = HardwareBufferUsageFlags::kNone

Definition at line 50 of file hardware_buffer.h.

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

impeller/toolkit/android/hardware_buffer.h
impeller/toolkit/android/hardware_buffer.cc

Public Member Functions

Static Public Member Functions

Public Attributes