HudContext Class Reference

Accumulates HUD geometry during a frame for batch rendering. More...

#include <HudContext.hpp>

Collaboration diagram for HudContext:

Public Member Functions
void	init (const SdfAtlas *atlas)
	Bind the SDF atlas for text layout (glyph metrics).
void	beginFrame ()
	Clear all geometry for a new frame.
void	rect (float x, float y, float w, float h, HudColor color)
void	rectOutline (float x, float y, float w, float h, float thickness, HudColor color)
void	roundedRect (float x, float y, float w, float h, float radius, HudColor color)
void	rotatedRect (float cx, float cy, float w, float h, float angleDeg, HudColor color)
void	bar (float x, float y, float w, float h, float fill01, HudColor fg, HudColor bg)
void	text (const char *str, float x, float y, float size, HudColor color, HudAlign align=HudAlign::Left)
float	measureText (const char *str, float size) const
void	icon (HudIcon id, float x, float y, float size, HudColor tint=HudColor::white())
void	crosshair (const CrosshairStyle &style, float screenW, float screenH)
void	vignette (float screenW, float screenH, HudColor color)
	Draw a full-screen radial vignette overlay.
void	pushClipRect (float x, float y, float w, float h)
void	popClipRect ()
void	endFrame ()
	Flush any remaining unflushed vertices into a final clip span.
const std::vector< HudVertex > &	vertices () const
const std::vector< std::array< float, 6 > > &	clipSpans () const
	Clip rect spans: {startVertex, vertexCount, x, y, w, h}.

Private Member Functions
void	emitQuad (float x, float y, float w, float h, float u0, float v0, float u1, float v1, HudColor color, float texMode, float sd0=0.f, float sd1=0.f, float sd2=0.f)
	Emit 6 vertices for a textured quad.
void	flushClipSpan ()
	Flush the current clip span before changing scissor state.

Private Attributes
const SdfAtlas *	sdfAtlas_ = nullptr
std::vector< HudVertex >	vertices_
std::vector< std::array< float, 6 > >	clipSpans_
std::vector< std::array< float, 4 > >	clipStack_
uint32_t	spanStartVertex_ = 0
	Vertex index where current clip span started.
bool	spanDirty_ = false

Detailed Description

Accumulates HUD geometry during a frame for batch rendering.

Widgets call rect(), text(), bar(), etc. to emit quads. At the end of the frame, HudRenderer consumes the vertex buffer and clip rect list.

Member Function Documentation

bar()

void HudContext::bar	(	float	x,
		float	y,
		float	w,
		float	h,
		float	fill01,
		HudColor	fg,
		HudColor	bg )

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beginFrame()

void HudContext::beginFrame

(

)

Clear all geometry for a new frame.

clipSpans()

const std::vector< std::array< float, 6 > > & HudContext::clipSpans ( ) const

inlinenodiscard

Clip rect spans: {startVertex, vertexCount, x, y, w, h}.

Negative w means "full viewport" (no scissor).

crosshair()

void HudContext::crosshair	(	const CrosshairStyle &	style,
		float	screenW,
		float	screenH )

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emitQuad()

void HudContext::emitQuad ( float x, float y, float w, float h, float u0, float v0, float u1, float v1, HudColor color, float texMode, float sd0 = 0.f, float sd1 = 0.f, float sd2 = 0.f )

private

Emit 6 vertices for a textured quad.

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endFrame()

void HudContext::endFrame

(

)

Flush any remaining unflushed vertices into a final clip span.

Must be called after all draw() calls, before accessing vertices/clipSpans.

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flushClipSpan()

void HudContext::flushClipSpan ( )

private

Flush the current clip span before changing scissor state.

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icon()

void HudContext::icon	(	HudIcon	id,
		float	x,
		float	y,
		float	size,
		HudColor	tint = HudColor::white() )

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init()

void HudContext::init

(

const SdfAtlas *

atlas

)

Bind the SDF atlas for text layout (glyph metrics).

measureText()

float HudContext::measureText	(	const char *	str,
		float	size ) const

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popClipRect()

void HudContext::popClipRect

(

)

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pushClipRect()

void HudContext::pushClipRect	(	float	x,
		float	y,
		float	w,
		float	h )

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rect()

void HudContext::rect	(	float	x,
		float	y,
		float	w,
		float	h,
		HudColor	color )

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rectOutline()

void HudContext::rectOutline	(	float	x,
		float	y,
		float	w,
		float	h,
		float	thickness,
		HudColor	color )

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rotatedRect()

void HudContext::rotatedRect	(	float	cx,
		float	cy,
		float	w,
		float	h,
		float	angleDeg,
		HudColor	color )

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roundedRect()

void HudContext::roundedRect	(	float	x,
		float	y,
		float	w,
		float	h,
		float	radius,
		HudColor	color )

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text()

void HudContext::text	(	const char *	str,
		float	x,
		float	y,
		float	size,
		HudColor	color,
		HudAlign	align = HudAlign::Left )

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vertices()

const std::vector< HudVertex > & HudContext::vertices ( ) const

inlinenodiscard

vignette()

void HudContext::vignette	(	float	screenW,
		float	screenH,
		HudColor	color )

Draw a full-screen radial vignette overlay.

Parameters

screenW	Viewport width in pixels.
screenH	Viewport height in pixels.
color	Tint color with alpha controlling intensity.

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Member Data Documentation

clipSpans_

std::vector<std::array<float, 6> > HudContext::clipSpans_

private

clipStack_

std::vector<std::array<float, 4> > HudContext::clipStack_

private

sdfAtlas_

const SdfAtlas* HudContext::sdfAtlas_ = nullptr

private

spanDirty_

bool HudContext::spanDirty_ = false

private

spanStartVertex_

uint32_t HudContext::spanStartVertex_ = 0

private

Vertex index where current clip span started.

vertices_

std::vector<HudVertex> HudContext::vertices_

private

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

• src/client/hud/HudContext.hpp
• src/client/hud/HudContext.cpp