juce::OpenGLHelpers Class Reference

A set of miscellaneous openGL helper functions. More...

#include <juce_OpenGLHelpers.h>

Static Public Member Functions
static void	clear (Colour colour)
	Clears the current context using the given colour.
static void	enableScissorTest (Rectangle< int > clip)
static void *	getExtensionFunction (const char *functionName)
	Returns the address of a named GL extension function.
static String	getGLSLVersionString ()
	Returns a version string such as "#version 150" suitable for prefixing a GLSL shader on this platform.
static bool	isContextActive ()
	Returns true if the current thread has an active OpenGL context.
static bool	isExtensionSupported (const char *extensionName)
	Checks whether the current context supports the specified extension.
static void	resetErrorState ()
	Clears the GL error state.
static String	translateFragmentShaderToV3 (const String &)
	Makes some simple textual changes to a shader program to try to convert old GLSL keywords to their v3 equivalents.
static String	translateVertexShaderToV3 (const String &)
	Makes some simple textual changes to a shader program to try to convert old GLSL keywords to their v3 equivalents.

Detailed Description

A set of miscellaneous openGL helper functions.

@tags{OpenGL}

Member Function Documentation

clear()

static void juce::OpenGLHelpers::clear ( Colour  colour )

static

Clears the current context using the given colour.

enableScissorTest()

static void juce::OpenGLHelpers::enableScissorTest ( Rectangle< int >  clip )

static

getExtensionFunction()

static void * juce::OpenGLHelpers::getExtensionFunction ( const char *  functionName )

static

Returns the address of a named GL extension function.

Referenced by juce::OpenGLContext::NativeContext::initialiseOnRenderThread(), and juce::OpenGLContext::NativeContext::setSwapInterval().

getGLSLVersionString()

static String juce::OpenGLHelpers::getGLSLVersionString ( )

static

Returns a version string such as "#version 150" suitable for prefixing a GLSL shader on this platform.

isContextActive()

bool juce::OpenGLHelpers::isContextActive ( )

static

Returns true if the current thread has an active OpenGL context.

isExtensionSupported()

static bool juce::OpenGLHelpers::isExtensionSupported ( const char *  extensionName )

static

Checks whether the current context supports the specified extension.

Referenced by juce::OpenGLContext::NativeContext::wglChoosePixelFormatExtension().

resetErrorState()

static void juce::OpenGLHelpers::resetErrorState ( )

static

Clears the GL error state.

translateFragmentShaderToV3()

static String juce::OpenGLHelpers::translateFragmentShaderToV3 ( const String &  )

static

Makes some simple textual changes to a shader program to try to convert old GLSL keywords to their v3 equivalents.

Before doing this, the function will check whether the current context is actually using a later version of the language, and if not it will not make any changes. Obviously this is not a real parser, so will only work on simple code!

translateVertexShaderToV3()

static String juce::OpenGLHelpers::translateVertexShaderToV3 ( const String &  )

static

Makes some simple textual changes to a shader program to try to convert old GLSL keywords to their v3 equivalents.

Before doing this, the function will check whether the current context is actually using a later version of the language, and if not it will not make any changes. Obviously this is not a real parser, so will only work on simple code!

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

• juce_OpenGLHelpers.h
• juce_OpenGL_android.h
• juce_OpenGL_ios.h
• juce_OpenGL_linux.h
• juce_OpenGL_mac.h
• juce_OpenGL_windows.h