Implementation of IDraw2d interface for 2D drawing in screen space. More...

#include <Draw2d.h>

Inherits IDraw2d, and AZ::Render::Bootstrap::NotificationBus::Handler.

Classes
class	DeferredLine

class	DeferredPrimitive

class	DeferredQuad

class	DeferredRectOutline

class	DeferredText

struct	Draw2dShaderData

Public Member Functions
	CDraw2d (AZ::RPI::ViewportContextPtr viewportContext=nullptr)
	Constructor, constructed by the LyShine class.

void	DrawImage (AZ::Data::Instance< AZ::RPI::Image > image, AZ::Vector2 position, AZ::Vector2 size, float opacity=1.0f, float rotation=0.0f, const AZ::Vector2 pivotPoint=nullptr, const AZ::Vector2 minMaxTexCoords=nullptr, ImageOptions *imageOptions=nullptr) override
	Draw a textured quad with the top left corner at the given position. More...

void	DrawImageAligned (AZ::Data::Instance< AZ::RPI::Image > image, AZ::Vector2 position, AZ::Vector2 size, HAlign horizontalAlignment, VAlign verticalAlignment, float opacity=1.0f, float rotation=0.0f, const AZ::Vector2 minMaxTexCoords=nullptr, ImageOptions imageOptions=nullptr) override
	Draw a textured quad where the position specifies the point specified by the alignment. More...

void	DrawQuad (AZ::Data::Instance< AZ::RPI::Image > image, VertexPosColUV *verts, Rounding pixelRounding=Rounding::Nearest, bool clamp=false, const RenderState &renderState=RenderState{}) override
	Draw a textured quad where the position, color and uv of each point is specified explicitly. More...

void	DrawLine (AZ::Vector2 start, AZ::Vector2 end, AZ::Color color, IDraw2d::Rounding pixelRounding=IDraw2d::Rounding::Nearest, const RenderState &renderState=RenderState{}) override
	Draw a line. More...

void	DrawLineTextured (AZ::Data::Instance< AZ::RPI::Image > image, VertexPosColUV *verts, IDraw2d::Rounding pixelRounding=IDraw2d::Rounding::Nearest, const RenderState &renderState=RenderState{}) override
	Draw a line with a texture so it can be dotted or dashed. More...

void	DrawText (const char textString, AZ::Vector2 position, float pointSize, float opacity=1.0f, TextOptions textOptions=nullptr) override
	Draw a text string. Only supports ASCII text. More...

void	DrawRectOutlineTextured (AZ::Data::Instance< AZ::RPI::Image > image, UiTransformInterface::RectPoints points, AZ::Vector2 rightVec, AZ::Vector2 downVec, AZ::Color color, uint32_t lineThickness=0) override
	Draw a rectangular outline with a texture. More...

AZ::Vector2	GetTextSize (const char textString, float pointSize, TextOptions textOptions=nullptr) override
	Get the width and height (in pixels) that would be used to draw the given text string. More...

float	GetViewportWidth () const override
	Get the width of the rendering viewport (in pixels).

float	GetViewportHeight () const override
	Get the height of the rendering viewport (in pixels).

float	GetViewportDpiScalingFactor () const override
	Get dpi scale factor.

const ImageOptions &	GetDefaultImageOptions () const override
	Get the default values that would be used if no image options were passed in. More...

const TextOptions &	GetDefaultTextOptions () const override
	Get the default values that would be used if no text options were passed in. More...

void	RenderDeferredPrimitives () override
	Render the primitives that have been deferred.

void	SetDeferPrimitives (bool deferPrimitives) override
	Specify whether to defer future primitives or render them right away.

bool	GetDeferPrimitives () override
	Return whether future primitives will be deferred or rendered right away.

void	SetSortKey (int64_t key) override
	Set sort key offset for following draws.

Public Member Functions inherited from IDraw2d
virtual	~IDraw2d ()
	Implement virtual destructor just for safety.

Static Public Member Functions
static AZ::Data::Instance< AZ::RPI::Image >	LoadTexture (const AZStd::string &pathName)
	Helper to load a texture.

Protected Types
enum	{ MAX_VERTICES_IN_PRIM = 6 }

Protected Member Functions
void	RotatePointsAboutPivot (AZ::Vector2 *points, int numPoints, AZ::Vector2 pivot, float angle) const
	Rotate an array of points around the z-axis at the pivot point. More...

void	DrawOrDeferQuad (const DeferredQuad *quad)
	Draw or defer a quad.

void	DrawOrDeferLine (const DeferredLine *line)
	Draw or defer a line.

void	DrawOrDeferTextString (const DeferredText *text)
	Draw or defer a text string.

void	DrawOrDeferRectOutline (const DeferredRectOutline *outlineRect)
	Draw or defer a rect outline.

AZ::RPI::ViewportContextPtr	GetViewportContext () const
	Get specified viewport context or default viewport context if not specified.

Protected Attributes
ImageOptions	m_defaultImageOptions
	The default image options used if nullptr is passed.

TextOptions	m_defaultTextOptions
	The default text options used if nullptr is passed.

bool	m_deferCalls
	True if the actual render of the primitives should be deferred to a RenderDeferredPrimitives call.

std::vector< DeferredPrimitive * >	m_deferredPrimitives

AZ::RPI::ViewportContextPtr	m_viewportContext

AZ::RHI::Ptr< AZ::RPI::DynamicDrawContext >	m_dynamicDraw

Draw2dShaderData	m_shaderData

Additional Inherited Members
Public Types inherited from IDraw2d
enum class	HAlign { Left , Center , Right }
	Horizontal alignment can be used for both text and image drawing.

enum class	VAlign { Top , Center , Bottom }
	Vertical alignment can be used for both text and image drawing.

enum class	Rounding { None , Nearest , Down , Up }
	Used for specifying how to round positions to an exact pixel position for pixel-perfect rendering.

enum	{ MAX_TEXT_STRING_LENGTH = 1024 }

Detailed Description

Implementation of IDraw2d interface for 2D drawing in screen space.

The CDraw2d class implements the IDraw2d interface for drawing 2D images, shapes and text. Positions and sizes are specified in pixels in the associated 2D viewport.

Member Function Documentation

◆ DrawImage()

void CDraw2d::DrawImage	(	AZ::Data::Instance< AZ::RPI::Image >	image,
		AZ::Vector2	position,
		AZ::Vector2	size,
		float	opacity = `1.0f`,
		float	rotation = `0.0f`,
		const AZ::Vector2 *	pivotPoint = `nullptr`,
		const AZ::Vector2 *	minMaxTexCoords = `nullptr`,
		ImageOptions *	imageOptions = `nullptr`
	)

overridevirtual

Draw a textured quad with the top left corner at the given position.

The image is drawn with the color specified by SetShapeColor and the opacity passed as an argument. If rotation is non-zero then the quad is rotated. If the pivot point is provided then the points of the quad are rotated about that point, otherwise they are rotated about the top left corner of the quad.

Parameters

texId	The texture ID returned by ITexture::GetTextureID()
position	Position of the top left corner of the quad (before rotation) in pixels
size	The width and height of the quad. Use texture width and height to avoid minification, magnification or stretching (assuming the minMaxTexCoords are left to the default)
opacity	The alpha value used when blending
rotation	Angle of rotation in degrees counter-clockwise
pivotPoint	The point about which the quad is rotated
minMaxTexCoords	An optional two component array. The first component is the UV coord for the top left point of the quad and the second is the UV coord of the bottom right point of the quad
imageOptions	Optional struct specifying options that tend to be the same from call to call

Implements IDraw2d.

◆ DrawImageAligned()

void CDraw2d::DrawImageAligned	(	AZ::Data::Instance< AZ::RPI::Image >	image,
		AZ::Vector2	position,
		AZ::Vector2	size,
		HAlign	horizontalAlignment,
		VAlign	verticalAlignment,
		float	opacity = `1.0f`,
		float	rotation = `0.0f`,
		const AZ::Vector2 *	minMaxTexCoords = `nullptr`,
		ImageOptions *	imageOptions = `nullptr`
	)

overridevirtual

Draw a textured quad where the position specifies the point specified by the alignment.

Rotation is always around the position.

Parameters

texId	The texture ID returned by ITexture::GetTextureID()
position	Position align point of the quad (before rotation) in pixels
size	The width and height of the quad. Use texture width and height to avoid minification, magnification or stretching (assuming the minMaxTexCoords are left to the default)
horizontalAlignment	Specifies how the quad is horizontally aligned to the given position
verticalAlignment	Specifies how the quad is vertically aligned to the given position
opacity	The alpha value used when blending
rotation	Angle of rotation in degrees counter-clockwise
minMaxTexCoords	An optional two component array. The first component is the UV coord for the top left point of the quad and the second is the UV coord of the bottom right point of the quad
imageOptions	Optional struct specifying options that tend to be the same from call to call

Implements IDraw2d.

◆ DrawLine()

void CDraw2d::DrawLine	(	AZ::Vector2	start,
		AZ::Vector2	end,
		AZ::Color	color,
		IDraw2d::Rounding	pixelRounding = `IDraw2d::Rounding::Nearest`,
		const RenderState &	renderState = `RenderState{}`
	)

overridevirtual

Draw a line.

Parameters

start	The start position
end	The end position
color	The color of the line
pixelRounding	Whether and how to round pixel coordinates
renderState	Blend mode and depth state

Implements IDraw2d.

◆ DrawLineTextured()

void CDraw2d::DrawLineTextured	(	AZ::Data::Instance< AZ::RPI::Image >	image,
		VertexPosColUV *	verts,
		IDraw2d::Rounding	pixelRounding = `IDraw2d::Rounding::Nearest`,
		const RenderState &	renderState = `RenderState{}`
	)

overridevirtual

Draw a line with a texture so it can be dotted or dashed.

Parameters

texId	The texture ID returned by ITexture::GetTextureID()
verts	An array of 2 vertices for the start and end points of the line
pixelRounding	Whether and how to round pixel coordinates
renderState	Blend mode and depth state

Implements IDraw2d.

◆ DrawQuad()

void CDraw2d::DrawQuad	(	AZ::Data::Instance< AZ::RPI::Image >	image,
		VertexPosColUV *	verts,
		Rounding	pixelRounding = `Rounding::Nearest`,
		bool	clamp = `false`,
		const RenderState &	renderState = `RenderState{}`
	)

overridevirtual

Draw a textured quad where the position, color and uv of each point is specified explicitly.

Parameters

texId	The texture ID returned by ITexture::GetTextureID()
verts	An array of 4 vertices, in clockwise order (e.g. top left, top right, bottom right, bottom left)
pixelRounding	Whether and how to round pixel coordinates
renderState	Blend mode and depth state

Implements IDraw2d.

◆ DrawRectOutlineTextured()

void CDraw2d::DrawRectOutlineTextured	(	AZ::Data::Instance< AZ::RPI::Image >	image,
		UiTransformInterface::RectPoints	points,
		AZ::Vector2	rightVec,
		AZ::Vector2	downVec,
		AZ::Color	color,
		uint32_t	lineThickness = `0`
	)

overridevirtual

Draw a rectangular outline with a texture.

Parameters

image	The texture to be used for drawing the outline
points	The rect's vertices (top left, top right, bottom right, bottom left)
rightVec	Right vector. Specified because the rect's width/height could be 0
downVec	Down vector. Specified because the rect's width/height could be 0
color	The color of the outline
lineThickness	The thickness in pixels of the outline. If 0, it will be based on image height

Implements IDraw2d.

◆ DrawText()

void CDraw2d::DrawText	(	const char *	textString,
		AZ::Vector2	position,
		float	pointSize,
		float	opacity = `1.0f`,
		TextOptions *	textOptions = `nullptr`
	)

overridevirtual

Draw a text string. Only supports ASCII text.

The font and effect used to render the text are specified in the textOptions structure

Parameters

textString	A null terminated ASCII text string. May contain characters
position	Position of the text in pixels. Alignment values in textOptions affect actual position
pointSize	The size of the font to use
opacity	The opacity (alpha value) to use to draw the text
textOptions	Pointer to an options struct. If null the default options are used

Implements IDraw2d.

◆ GetDefaultImageOptions()

const ImageOptions& CDraw2d::GetDefaultImageOptions ( ) const

overridevirtual

Get the default values that would be used if no image options were passed in.

This is a convenient way to initialize the imageOptions struct

Implements IDraw2d.

◆ GetDefaultTextOptions()

const TextOptions& CDraw2d::GetDefaultTextOptions ( ) const

overridevirtual

Get the default values that would be used if no text options were passed in.

This is a convenient way to initialize the textOptions struct

Implements IDraw2d.

◆ GetTextSize()

AZ::Vector2 CDraw2d::GetTextSize	(	const char *	textString,
		float	pointSize,
		TextOptions *	textOptions = `nullptr`
	)

overridevirtual

Get the width and height (in pixels) that would be used to draw the given text string.

Pass the same parameter values that would be used to draw the string

Implements IDraw2d.

◆ RotatePointsAboutPivot()

void CDraw2d::RotatePointsAboutPivot	(	AZ::Vector2 *	points,
		int	numPoints,
		AZ::Vector2	pivot,
		float	angle
	)		const

protected

Rotate an array of points around the z-axis at the pivot point.

Angle is in degrees counter-clockwise

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

Gems/LyShine/Code/Source/Draw2d.h

Classes

Public Member Functions

Static Public Member Functions

Protected Types

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ DrawImage()

◆ DrawImageAligned()

◆ DrawLine()

◆ DrawLineTextured()

◆ DrawQuad()

◆ DrawRectOutlineTextured()

◆ DrawText()

◆ GetDefaultImageOptions()

◆ GetDefaultTextOptions()

◆ GetTextSize()

◆ RotatePointsAboutPivot()