StelQGL1Renderer Class Reference

Renderer backend using OpenGL 1.2 with Qt. More...

#include <StelQGL1Renderer.hpp>

Public Member Functions
	StelQGL1Renderer (QGraphicsView *parent)
	Construct a StelQGL1Renderer.
virtual bool	init ()
	Initialize the renderer.
virtual bool	areFloatTexturesSupported () const
	Returns true if floating point textures are supported, false otherwise.
virtual bool	areNonPowerOfTwoTexturesSupported () const
	Returns true if non-power-of-two textures are supported, false otherwise.
virtual StelGLSLShader *	createGLSLShader ()
	Create a GLSL shader.
virtual bool	isGLSLSupported () const
	Are GLSL shaders supported?
Protected Member Functions
virtual StelVertexBufferBackend *	createVertexBufferBackend (const PrimitiveType primitiveType, const QVector< StelVertexAttribute > &attributes)
	Create a vertex buffer backend.
virtual void	drawVertexBufferBackend (StelVertexBufferBackend vertexBuffer, StelIndexBuffer indexBuffer=NULL, StelProjector *projector=NULL, bool dontProject=false)
	Draw contents of a vertex buffer (backend).
virtual int	getTextureUnitCountBackend ()
	Return the number of texture units (implementation).
virtual void	invariant () const
	Asserts that we're in a valid state.

Detailed Description

Renderer backend using OpenGL 1.2 with Qt.

GL 1.0 is not supported as it doesn't have vertex arrays, and GL 1.1 doesn't have clamp to edge texture wrap mode. That said, pretty much everything supports GL 1.2 (introduced in 1998). The oldest GPUs supporting GL 1.2 are ATI Rage and GeForce 2 (GeForce 1 and TNT2 support GL 1.2 with updated drivers, although some functionality might be software emulated).

Although later GL1 versions and extensions have many useful features (basic shaders, VBOs, etc.), these are not used - with the exception of multitexturing, which is still not mandatory - so compatibility is as high as possible.

Note:: This is an internal class of the Renderer subsystem and should not be used elsewhere.

Definition at line 49 of file StelQGL1Renderer.hpp.

Constructor & Destructor Documentation

StelQGL1Renderer::StelQGL1Renderer ( QGraphicsView * parent ) [inline]

Construct a StelQGL1Renderer.

Parameters:

parent

Parent widget for the renderer's GL widget.

Definition at line 37 of file StelQGL1Renderer.hpp.

Member Function Documentation

virtual bool StelQGL1Renderer::areFloatTexturesSupported ( ) const [inline, virtual]

Returns true if floating point textures are supported, false otherwise.

Implements StelRenderer.

Definition at line 71 of file StelQGL1Renderer.hpp.

virtual bool StelQGL1Renderer::areNonPowerOfTwoTexturesSupported ( ) const [inline, virtual]

Returns true if non-power-of-two textures are supported, false otherwise.

Implements StelQGLRenderer.

Definition at line 73 of file StelQGL1Renderer.hpp.

virtual StelGLSLShader* StelQGL1Renderer::createGLSLShader ( ) [inline, virtual]

Create a GLSL shader.

This can only be called if isGLSLSupported() is true.

The constructed shader must be deleted before the StelRenderer is destroyed.

Reimplemented from StelRenderer.

Definition at line 75 of file StelQGL1Renderer.hpp.

virtual StelVertexBufferBackend* StelQGL1Renderer::createVertexBufferBackend	(	const PrimitiveType	primitiveType,
		const QVector< StelVertexAttribute > &	attributes
	)			`[inline, protected, virtual]`

Create a vertex buffer backend.

Used by createVertexBuffer.

This allows each Renderer backend to create its own vertex buffer backend.

Parameters:

	primitiveType	Graphics primitive type stored in the buffer.
	attributes	Descriptions of all attributes of the vertex type stored in the buffer.

Returns:: Pointer to a vertex buffer backend specific to the Renderer backend.

Implements StelRenderer.

Definition at line 85 of file StelQGL1Renderer.hpp.

virtual void StelQGL1Renderer::drawVertexBufferBackend	(	StelVertexBufferBackend *	vertexBuffer,
		StelIndexBuffer *	indexBuffer = `NULL`,
		StelProjector *	projector = `NULL`,
		bool	dontProject = `false`
	)			`[inline, protected, virtual]`