inviwo::utilgl::DataMinMaxGL Class Reference

Utility class for computing min and max values using OpenGL. More...

#include <dataminmaxgl.h>

Public Member Functions
	DataMinMaxGL (const DataMinMaxGL &)=delete
	DataMinMaxGL (DataMinMaxGL &&) noexcept=default
DataMinMaxGL &	operator= (const DataMinMaxGL &)=delete
DataMinMaxGL &	operator= (DataMinMaxGL &&) noexcept=default
std::pair< dvec4, dvec4 >	minMax (const Volume &volume)
std::pair< dvec4, dvec4 >	minMax (const VolumeGL &volumeGL)
std::pair< dvec4, dvec4 >	minMax (const Layer &layer)
std::pair< dvec4, dvec4 >	minMax (const LayerGL &layerGL)
std::pair< dvec4, dvec4 >	minMax (const BufferBase &buffer)
std::pair< dvec4, dvec4 >	minMax (const BufferGL &bufferGL)

Static Public Member Functions
static bool	isSuppportedByGPU ()

Detailed Description

Utility class for computing min and max values using OpenGL.

This class uses compute shaders to compute min and max values of Buffers, Layers, and Volumes. If compute shaders are not available, the corresponding CPU functions from modules/base/algorithm/dataminmax.h are used instead.

The GPU needs to support the following OpenGL extensions:

• GL_KHR_shader_subgroup
• for 8bit and 16bit data type support for SSBOs (int8_t, i8vec2, ...)
  • NVIDIA: GL_NV_gpu_shader5
  • AMD: GL_EXT_shader_explicit_arithmetic_types

Member Function Documentation

isSuppportedByGPU()

static bool inviwo::utilgl::DataMinMaxGL::isSuppportedByGPU ( )

static

Check whether the GPU supports compute shaders and the necessary OpenGL extensions.

• GL_KHR_shader_subgroup
• for 8bit and 16bit data type support for SSBOs (int8_t, i8vec2, ...)
  • NVIDIA: GL_NV_gpu_shader5
  • AMD: GL_EXT_shader_explicit_arithmetic_types

Returns

true if the GPU fulfills all requirements

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

• dataminmaxgl.h