A class to emulate an OpenGL accumulation buffer using an FBO. More...
#include <accumBufferObject.h>
Inheritance diagram for eq::util::AccumBufferObject:
Collaboration diagram for eq::util::AccumBufferObject:
Public Member Functions | |
| AccumBufferObject (const GLEWContext *const glewContext) | |
| Construct a new Accumulation Buffer Object. More... | |
| ~AccumBufferObject () | |
| Destruct the Accumulation Buffer Object. More... | |
| bool | init (const PixelViewport &pvp, const unsigned format) |
| Initialize the Accumulation Buffer Object. More... | |
| void | exit () |
| De-initialize the Accumulation Buffer Object. More... | |
| void | load (const float value) |
| Load the current read buffer into the accumulation buffer. More... | |
| void | accum (const float value) |
| Accumulate the current read buffer into the accumulation buffer. More... | |
| void | display (const float value) |
| Transfer accumulation buffer values to the draw buffer. More... | |
| bool | resize (const PixelViewport &pvp) |
| Resets the pixel viewport used in display and resizes the accumulation buffer if needed. More... | |
| Public Member Functions inherited from eq::util::FrameBufferObject | |
| FrameBufferObject (const GLEWContext *const glewContext, const unsigned textureTarget=0x84F5) | |
| Construct a new Frame Buffer Object. More... | |
| ~FrameBufferObject () | |
| Destruct the Frame Buffer Object. More... | |
| bool | addColorTexture () |
| Add one color texture to the FBO. More... | |
| bool | init (const int32_t width, const int32_t height, const unsigned colorFormat, const int32_t depthSize, const int32_t stencilSize) |
| Initialize the Frame Buffer Object. More... | |
| void | exit () |
| De-initialize the Frame Buffer Object. More... | |
| void | bind () |
| Bind to the Frame Buffer Object. More... | |
| void | unbind () |
| Unbind any Frame Buffer Object and use the default drawable for the current context. More... | |
| bool | resize (const int32_t width, const int32_t height) |
| Resize the FBO. More... | |
| int32_t | getWidth () const |
| int32_t | getHeight () const |
| const Textures & | getColorTextures () const |
| const Texture & | getDepthTexture () const |
| const eq::fabric::Error & | getError () |
| const GLEWContext * | glewGetContext () const |
| bool | isValid () const |
Detailed Description
A class to emulate an OpenGL accumulation buffer using an FBO.
- See Also
- glAccum(), eq::util::Accum
Definition at line 35 of file accumBufferObject.h.
Constructor & Destructor Documentation
| eq::util::AccumBufferObject::AccumBufferObject | ( | const GLEWContext *const | glewContext | ) |
Construct a new Accumulation Buffer Object.
- Version
- 1.0
| eq::util::AccumBufferObject::~AccumBufferObject | ( | ) |
Destruct the Accumulation Buffer Object.
- Version
- 1.0
Member Function Documentation
| void eq::util::AccumBufferObject::accum | ( | const float | value | ) |
Accumulate the current read buffer into the accumulation buffer.
The color values of the current read buffer are multiplied by value and added to the accumulation buffer.
- Parameters
-
value a floating-point value multiplying the source values during the accum operation.
- Version
- 1.0
| void eq::util::AccumBufferObject::display | ( | const float | value | ) |
Transfer accumulation buffer values to the draw buffer.
The accumulation buffer color values are multiplied by value, and copied into the current draw buffer.
- Parameters
-
value a floating-point value multiplying the accumulation values during the operation.
- Version
- 1.0
| void eq::util::AccumBufferObject::exit | ( | ) |
De-initialize the Accumulation Buffer Object.
- Version
- 1.0
| bool eq::util::AccumBufferObject::init | ( | const PixelViewport & | pvp, |
| const unsigned | format | ||
| ) |
Initialize the Accumulation Buffer Object.
The ABO uses a 32-bit float texture for the accumulation.
- Parameters
-
pvp the initial pixel viewport of the rendering buffer. format the texture format corresponding to the source color read buffer.
- Returns
- true on success, false otherwise
- See Also
- Window::getColorFormat(), glReadBuffer()
- Version
- 1.0
| void eq::util::AccumBufferObject::load | ( | const float | value | ) |
Load the current read buffer into the accumulation buffer.
The color values of the current read buffer are multiplied with value and copied into the accumulation buffer.
- Parameters
-
value a floating-point value multiplying the source values during the load operation.
- Version
- 1.0
| bool eq::util::AccumBufferObject::resize | ( | const PixelViewport & | pvp | ) |
Resets the pixel viewport used in display and resizes the accumulation buffer if needed.
- Parameters
-
pvp pixel viewport of the destination buffer.
- Returns
- true if the accumulation buffer has been resized.
- Version
- 1.5.2
The documentation for this class was generated from the following file:
