ACG::ScreenQuad Class Reference

#include <OpenFlipper/libs_required/ACG/GL/ScreenQuad.hh>

Public Member Functions
	~ScreenQuad ()
	Destructor.

Static Public Member Functions
static void	draw (GLSL::Program *_prog=0)
	Draw the screen quad.
static void	drawInstanced (int _count, GLSL::Program *_prog=0)
	Draw the screen quad with instancing.
static void	drawTexture2D (GLuint _texture, const Vec2f &_offset=Vec2f(0.0f, 0.0f), const Vec2f &_size=Vec2f(1.0f, 1.0f))
	Draw a 2D texture to screen.

Private Member Functions
	ScreenQuad ()
	Default constructor.
void	init ()
	Initialize vbo and format.
void	intDraw (GLSL::Program *_prog, int _numInstances=0)
	Internal draw function.

Static Private Member Functions
static ScreenQuad &	instance ()
	Get singleton instance.

Private Attributes
GLuint	vbo_
	vbo containing the quad in projected coordinates
VertexDeclaration *	decl_
	vertex format of screen quad (float2 pos)
GLSL::Program *	texDrawProg_
	Simple texture drawing shader.

Detailed Description

This class provides a simple method to draw a screen-aligned quad.

Definition at line 72 of file ScreenQuad.hh.

Constructor & Destructor Documentation

~ScreenQuad()

ACG::ScreenQuad::~ScreenQuad

(

)

Destructor.

Definition at line 75 of file ScreenQuad.cc.

ScreenQuad()

ACG::ScreenQuad::ScreenQuad ( )

private

Default constructor.

Definition at line 66 of file ScreenQuad.cc.

Member Function Documentation

draw()

void ACG::ScreenQuad::draw ( GLSL::Program *  _prog = 0 )

static

Draw the screen quad.

The quad is in projected space with coordinates in [-1, 1].

Parameters

_prog

GLSL shader to bind attribute id's if needed. Pass null-pointer for fixed function rendering

Definition at line 138 of file ScreenQuad.cc.

drawInstanced()

void ACG::ScreenQuad::drawInstanced ( int  _count, GLSL::Program *  _prog = 0  )

static

Draw the screen quad with instancing.

Can be used for render to 2D-array / 3D volume The quad is in projected space with coordinates in [-1, 1].

Parameters

_count	number of instances
_prog	GLSL shader to bind attribute id's if needed. Pass null-pointer for fixed function rendering

Definition at line 150 of file ScreenQuad.cc.

drawTexture2D()

void ACG::ScreenQuad::drawTexture2D ( GLuint  _texture, const Vec2f &  _offset = Vec2f(0.0f, 0.0f), const Vec2f &  _size = Vec2f(1.0f, 1.0f)  )

static

Draw a 2D texture to screen.

Useful for debugging, copying a texture..

Parameters

_texture	Texture that should be bound when drawing the quad
_offset	Offset passed to the uniform called offset in the shader
_size	Size passed to the uniform called size in the shader

Definition at line 197 of file ScreenQuad.cc.

init()

void ACG::ScreenQuad::init ( )

private

Initialize vbo and format.

Definition at line 94 of file ScreenQuad.cc.

instance()

ScreenQuad & ACG::ScreenQuad::instance ( )

staticprivate

Get singleton instance.

Definition at line 86 of file ScreenQuad.cc.

intDraw()

void ACG::ScreenQuad::intDraw ( GLSL::Program *  _prog, int  _numInstances = 0  )

private

Internal draw function.

Definition at line 162 of file ScreenQuad.cc.

Member Data Documentation

decl_

VertexDeclaration* ACG::ScreenQuad::decl_

private

vertex format of screen quad (float2 pos)

Definition at line 128 of file ScreenQuad.hh.

texDrawProg_

GLSL::Program* ACG::ScreenQuad::texDrawProg_

private

Simple texture drawing shader.

Definition at line 132 of file ScreenQuad.hh.

vbo_

GLuint ACG::ScreenQuad::vbo_

private

vbo containing the quad in projected coordinates

Definition at line 125 of file ScreenQuad.hh.

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

• OpenFlipper/libs_required/ACG/GL/ScreenQuad.hh
• OpenFlipper/libs_required/ACG/GL/ScreenQuad.cc