java.lang.Object
- org.lwjgl.system.Pointer.Default
- - org.lwjgl.system.Struct
  - - org.lwjgl.vulkan.VkViewport

All Implemented Interfaces:

java.lang.AutoCloseable, org.lwjgl.system.NativeResource, org.lwjgl.system.Pointer
```
public class VkViewport
extends org.lwjgl.system.Struct
implements org.lwjgl.system.NativeResource
```
Structure specifying a viewport.
Description

The framebuffer depth coordinate z_f may be represented using either a fixed-point or floating-point representation. However, a floating-point representation must be used if the depth/stencil attachment has a floating-point depth component. If an m-bit fixed-point representation is used, we assume that it represents each value k / (2^m - 1), where k ∈ { 0, 1, ..., 2^m-1 }, as k (e.g. 1.0 is represented in binary as a string of all ones).

The viewport parameters shown in the above equations are found from these values as

o_x = x + width / 2

o_y = y + height / 2

o_z = minDepth

p_x = width

p_y = height

p_z = maxDepth - minDepth.

The application can specify a negative term for height, which has the effect of negating the y coordinate in clip space before performing the transform. When using a negative height, the application should also adjust the y value to point to the lower left corner of the viewport instead of the upper left corner. Using the negative height allows the application to avoid having to negate the y component of the Position output from the last vertex processing stage in shaders that also target other graphics APIs.

The width and height of the implementation-dependent maximum viewport dimensions must be greater than or equal to the width and height of the largest image which can be created and attached to a framebuffer.

The floating-point viewport bounds are represented with an implementation-dependent precision.

Valid Usage
- width must be greater than 0.0
- width must be less than or equal to VkPhysicalDeviceLimits::maxViewportDimensions[0]
- The absolute value of height must be less than or equal to VkPhysicalDeviceLimits::maxViewportDimensions[1]
- x must be greater than or equal to viewportBoundsRange[0]
- (x + width) must be less than or equal to viewportBoundsRange[1]
- y must be greater than or equal to viewportBoundsRange[0]
- y must be less than or equal to viewportBoundsRange[1]
- (y + height) must be greater than or equal to viewportBoundsRange[0]
- (y + height) must be less than or equal to viewportBoundsRange[1]
- Unless VK_EXT_depth_range_unrestricted extension is enabled minDepth must be between 0.0 and 1.0, inclusive
- Unless VK_EXT_depth_range_unrestricted extension is enabled maxDepth must be between 0.0 and 1.0, inclusive
See Also

VkPipelineViewportStateCreateInfo, CmdSetViewport

Member documentation
- x – x and y are the viewport’s upper left corner (x,y).
- y – see x
- width – width and height are the viewport’s width and height, respectively.
- height – see width
- minDepth – minDepth and maxDepth are the depth range for the viewport. It is valid for minDepth to be greater than or equal to maxDepth.
- maxDepth – see minDepth
Layout
```
 struct VkViewport {
     float x;
     float y;
     float width;
     float height;
     float minDepth;
     float maxDepth;
 }
```

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class VkViewport.Buffer
An array of VkViewport structs.
- Nested classes/interfaces inherited from interface org.lwjgl.system.Pointer
  org.lwjgl.system.Pointer.Default

Field Summary

Fields
Modifier and Type	Field	Description
`static int`	`ALIGNOF`	The struct alignment in bytes.
`static int`	`HEIGHT MAXDEPTH MINDEPTH`	The struct member offsets.
`static int`	`SIZEOF`	The struct size in bytes.
`static int`	`WIDTH X Y`	The struct member offsets.

Fields inherited from interface org.lwjgl.system.Pointer
BITS32, BITS64, CLONG_SHIFT, CLONG_SIZE, POINTER_SHIFT, POINTER_SIZE

Constructor Summary

Constructors
Constructor Description

VkViewport(java.nio.ByteBuffer container)
Creates a VkViewport instance at the current position of the specified ByteBuffer container.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`static VkViewport`	`calloc()`	Returns a new `VkViewport` instance allocated with `memCalloc`.
`static VkViewport.Buffer`	`calloc(int capacity)`	Returns a new `VkViewport.Buffer` instance allocated with `memCalloc`.
`static VkViewport`	`callocStack()`	Returns a new `VkViewport` instance allocated on the thread-local `MemoryStack` and initializes all its bits to zero.
`static VkViewport.Buffer`	`callocStack(int capacity)`	Returns a new `VkViewport.Buffer` instance allocated on the thread-local `MemoryStack` and initializes all its bits to zero.
`static VkViewport.Buffer`	`callocStack(int capacity, org.lwjgl.system.MemoryStack stack)`	Returns a new `VkViewport.Buffer` instance allocated on the specified `MemoryStack` and initializes all its bits to zero.
`static VkViewport`	`callocStack(org.lwjgl.system.MemoryStack stack)`	Returns a new `VkViewport` instance allocated on the specified `MemoryStack` and initializes all its bits to zero.
`static VkViewport`	`create()`	Returns a new `VkViewport` instance allocated with `BufferUtils`.
`static VkViewport.Buffer`	`create(int capacity)`	Returns a new `VkViewport.Buffer` instance allocated with `BufferUtils`.
`static VkViewport`	`create(long address)`	Returns a new `VkViewport` instance for the specified memory address.
`static VkViewport.Buffer`	`create(long address, int capacity)`	Create a `VkViewport.Buffer` instance at the specified memory.
`static VkViewport`	`createSafe(long address)`	Like `create`, but returns `null` if `address` is `NULL`.
`static VkViewport.Buffer`	`createSafe(long address, int capacity)`	Like `create`, but returns `null` if `address` is `NULL`.
`float`	`height()`	Returns the value of the `height` field.
`VkViewport`	`height(float value)`	Sets the specified value to the `height` field.
`static VkViewport`	`malloc()`	Returns a new `VkViewport` instance allocated with `memAlloc`.
`static VkViewport.Buffer`	`malloc(int capacity)`	Returns a new `VkViewport.Buffer` instance allocated with `memAlloc`.
`static VkViewport`	`mallocStack()`	Returns a new `VkViewport` instance allocated on the thread-local `MemoryStack`.
`static VkViewport.Buffer`	`mallocStack(int capacity)`	Returns a new `VkViewport.Buffer` instance allocated on the thread-local `MemoryStack`.
`static VkViewport.Buffer`	`mallocStack(int capacity, org.lwjgl.system.MemoryStack stack)`	Returns a new `VkViewport.Buffer` instance allocated on the specified `MemoryStack`.
`static VkViewport`	`mallocStack(org.lwjgl.system.MemoryStack stack)`	Returns a new `VkViewport` instance allocated on the specified `MemoryStack`.
`float`	`maxDepth()`	Returns the value of the `maxDepth` field.
`VkViewport`	`maxDepth(float value)`	Sets the specified value to the `maxDepth` field.
`float`	`minDepth()`	Returns the value of the `minDepth` field.
`VkViewport`	`minDepth(float value)`	Sets the specified value to the `minDepth` field.
`static float`	`nheight(long struct)`	Unsafe version of `height()`.
`static void`	`nheight(long struct, float value)`	Unsafe version of `height`.
`static float`	`nmaxDepth(long struct)`	Unsafe version of `maxDepth()`.
`static void`	`nmaxDepth(long struct, float value)`	Unsafe version of `maxDepth`.
`static float`	`nminDepth(long struct)`	Unsafe version of `minDepth()`.
`static void`	`nminDepth(long struct, float value)`	Unsafe version of `minDepth`.
`static float`	`nwidth(long struct)`	Unsafe version of `width()`.
`static void`	`nwidth(long struct, float value)`	Unsafe version of `width`.
`static float`	`nx(long struct)`	Unsafe version of `x()`.
`static void`	`nx(long struct, float value)`	Unsafe version of `x`.
`static float`	`ny(long struct)`	Unsafe version of `y()`.
`static void`	`ny(long struct, float value)`	Unsafe version of `y`.
`VkViewport`	`set(float x, float y, float width, float height, float minDepth, float maxDepth)`	Initializes this struct with the specified values.
`VkViewport`	`set(VkViewport src)`	Copies the specified struct data to this struct.
`int`	`sizeof()`
`float`	`width()`	Returns the value of the `width` field.
`VkViewport`	`width(float value)`	Sets the specified value to the `width` field.
`float`	`x()`	Returns the value of the `x` field.
`VkViewport`	`x(float value)`	Sets the specified value to the `x` field.
`float`	`y()`	Returns the value of the `y` field.
`VkViewport`	`y(float value)`	Sets the specified value to the `y` field.

Methods inherited from interface org.lwjgl.system.NativeResource
close, free

Methods inherited from class java.lang.Object
getClass, notify, notifyAll, wait, wait, wait

Methods inherited from class org.lwjgl.system.Pointer.Default
address, equals, hashCode, toString

Methods inherited from class org.lwjgl.system.Struct
clear, free, isNull

- Field Detail
  - SIZEOF
    
    The struct size in bytes.
  - ALIGNOF
    
    The struct alignment in bytes.
  - X, Y, WIDTH, HEIGHT, MINDEPTH, MAXDEPTH
    
    The struct member offsets.
- Constructor Detail
  - VkViewport
```
public VkViewport(java.nio.ByteBuffer container)
```
    Creates a VkViewport instance at the current position of the specified ByteBuffer container. Changes to the buffer's content will be visible to the struct instance and vice versa.
    The created instance holds a strong reference to the container object.
- Method Detail
  - sizeof
```
public int sizeof()
```
    Specified by:
    
    sizeof in class org.lwjgl.system.Struct
  - x
```
public float x()
```
    Returns the value of the x field.
  - y
```
public float y()
```
    Returns the value of the y field.
  - width
```
public float width()
```
    Returns the value of the width field.
  - height
```
public float height()
```
    Returns the value of the height field.
  - minDepth
```
public float minDepth()
```
    Returns the value of the minDepth field.
  - maxDepth
```
public float maxDepth()
```
    Returns the value of the maxDepth field.
  - x
```
public VkViewport x(float value)
```
    Sets the specified value to the x field.
  - y
```
public VkViewport y(float value)
```
    Sets the specified value to the y field.
  - width
```
public VkViewport width(float value)
```
    Sets the specified value to the width field.
  - height
```
public VkViewport height(float value)
```
    Sets the specified value to the height field.
  - minDepth
```
public VkViewport minDepth(float value)
```
    Sets the specified value to the minDepth field.
  - maxDepth
```
public VkViewport maxDepth(float value)
```
    Sets the specified value to the maxDepth field.
  - set
```
public VkViewport set(float x,
                      float y,
                      float width,
                      float height,
                      float minDepth,
                      float maxDepth)
```
    Initializes this struct with the specified values.
  - set
```
public VkViewport set(VkViewport src)
```
    Copies the specified struct data to this struct.
    
    Parameters:
    
    src - the source struct
    
    Returns:
    
    this struct
  - malloc
```
public static VkViewport malloc()
```
    Returns a new VkViewport instance allocated with memAlloc. The instance must be explicitly freed.
  - calloc
```
public static VkViewport calloc()
```
    Returns a new VkViewport instance allocated with memCalloc. The instance must be explicitly freed.
  - create
```
public static VkViewport create()
```
    Returns a new VkViewport instance allocated with BufferUtils.
  - create
```
public static VkViewport create(long address)
```
    Returns a new VkViewport instance for the specified memory address.
  - createSafe
```
@Nullable
public static VkViewport createSafe(long address)
```
    Like create, but returns null if address is NULL.
  - malloc
```
public static VkViewport.Buffer malloc(int capacity)
```
    Returns a new VkViewport.Buffer instance allocated with memAlloc. The instance must be explicitly freed.
    
    Parameters:
    
    capacity - the buffer capacity
  - calloc
```
public static VkViewport.Buffer calloc(int capacity)
```
    Returns a new VkViewport.Buffer instance allocated with memCalloc. The instance must be explicitly freed.
    
    Parameters:
    
    capacity - the buffer capacity
  - create
```
public static VkViewport.Buffer create(int capacity)
```
    Returns a new VkViewport.Buffer instance allocated with BufferUtils.
    
    Parameters:
    
    capacity - the buffer capacity
  - create
```
public static VkViewport.Buffer create(long address,
                                       int capacity)
```
    Create a VkViewport.Buffer instance at the specified memory.
    
    Parameters:
    
    address - the memory address
    
    capacity - the buffer capacity
  - createSafe
```
@Nullable
public static VkViewport.Buffer createSafe(long address,
                                           int capacity)
```
    Like create, but returns null if address is NULL.
  - mallocStack
```
public static VkViewport mallocStack()
```
    Returns a new VkViewport instance allocated on the thread-local MemoryStack.
  - callocStack
```
public static VkViewport callocStack()
```
    Returns a new VkViewport instance allocated on the thread-local MemoryStack and initializes all its bits to zero.
  - mallocStack
```
public static VkViewport mallocStack(org.lwjgl.system.MemoryStack stack)
```
    Returns a new VkViewport instance allocated on the specified MemoryStack.
    
    Parameters:
    
    stack - the stack from which to allocate
  - callocStack
```
public static VkViewport callocStack(org.lwjgl.system.MemoryStack stack)
```
    Returns a new VkViewport instance allocated on the specified MemoryStack and initializes all its bits to zero.
    
    Parameters:
    
    stack - the stack from which to allocate
  - mallocStack
```
public static VkViewport.Buffer mallocStack(int capacity)
```
    Returns a new VkViewport.Buffer instance allocated on the thread-local MemoryStack.
    
    Parameters:
    
    capacity - the buffer capacity
  - callocStack
```
public static VkViewport.Buffer callocStack(int capacity)
```
    Returns a new VkViewport.Buffer instance allocated on the thread-local MemoryStack and initializes all its bits to zero.
    
    Parameters:
    
    capacity - the buffer capacity
  - mallocStack
```
public static VkViewport.Buffer mallocStack(int capacity,
                                            org.lwjgl.system.MemoryStack stack)
```
    Returns a new VkViewport.Buffer instance allocated on the specified MemoryStack.
    
    Parameters:
    
    stack - the stack from which to allocate
    
    capacity - the buffer capacity
  - callocStack
```
public static VkViewport.Buffer callocStack(int capacity,
                                            org.lwjgl.system.MemoryStack stack)
```
    Returns a new VkViewport.Buffer instance allocated on the specified MemoryStack and initializes all its bits to zero.
    
    Parameters:
    
    stack - the stack from which to allocate
    
    capacity - the buffer capacity
  - nx
```
public static float nx(long struct)
```
    Unsafe version of x().
  - ny
```
public static float ny(long struct)
```
    Unsafe version of y().
  - nwidth
```
public static float nwidth(long struct)
```
    Unsafe version of width().
  - nheight
```
public static float nheight(long struct)
```
    Unsafe version of height().
  - nminDepth
```
public static float nminDepth(long struct)
```
    Unsafe version of minDepth().
  - nmaxDepth
```
public static float nmaxDepth(long struct)
```
    Unsafe version of maxDepth().
  - nx
```
public static void nx(long struct,
                      float value)
```
    Unsafe version of x.
  - ny
```
public static void ny(long struct,
                      float value)
```
    Unsafe version of y.
  - nwidth
```
public static void nwidth(long struct,
                          float value)
```
    Unsafe version of width.
  - nheight
```
public static void nheight(long struct,
                           float value)
```
    Unsafe version of height.
  - nminDepth
```
public static void nminDepth(long struct,
                             float value)
```
    Unsafe version of minDepth.
  - nmaxDepth
```
public static void nmaxDepth(long struct,
                             float value)
```
    Unsafe version of maxDepth.

Class VkViewport

Description

Valid Usage

See Also

Member documentation

Layout

Nested Class Summary

Nested classes/interfaces inherited from interface org.lwjgl.system.Pointer

Field Summary

Fields inherited from interface org.lwjgl.system.Pointer

Constructor Summary

Method Summary

Methods inherited from interface org.lwjgl.system.NativeResource

Methods inherited from class java.lang.Object

Methods inherited from class org.lwjgl.system.Pointer.Default

Methods inherited from class org.lwjgl.system.Struct

Field Detail

SIZEOF

ALIGNOF

X, Y, WIDTH, HEIGHT, MINDEPTH, MAXDEPTH

Constructor Detail

VkViewport

Method Detail

sizeof

x

y

width

height

minDepth

maxDepth

x

y

width

height

minDepth

maxDepth

set

set

malloc

calloc

create

create

createSafe

malloc

calloc

create

create

createSafe

mallocStack

callocStack

mallocStack

callocStack

mallocStack

callocStack

mallocStack

callocStack

nx

ny

nwidth

nheight

nminDepth

nmaxDepth

nx

ny

nwidth

nheight

nminDepth

nmaxDepth