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From Wang Rui, "In the attached files I've added the Compute Shader support for OSG, as well as serializer updates and a new osgcomputeshaders example. My submission also include a setComputeGroups() function in Program for setting compute-shader work groups, and a bindToImageUnit() function in Texture for binding textures as image variables in shaders.

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All code are tested on Windows 7 + NVIDIA GFX 570 with the latest GeForce 310.70 Driver (BETA), which could support OpenGL 4.3.

Compute shader information can be found at "http://www.opengl.org/registry/specs/ARB/compute_shader.txt"
"
This commit is contained in:
Robert Osfield
2013-01-25 11:54:03 +00:00
parent f6450a1123
commit 26a8f63212
16 changed files with 397 additions and 4 deletions
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9
include/osg/Program
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@@ -101,6 +101,10 @@ class OSG_EXPORT Program : public osg::StateAttribute
void setParameterfv( GLenum pname, const GLfloat* value );
const GLfloat* getParameterfv( GLenum pname ) const;
/** Set/get compute shader work groups */
void setComputeGroups( GLint numGroupsX, GLint numGroupsY, GLint numGroupsZ );
void getComputeGroups( GLint& numGroupsX, GLint& numGroupsY, GLint& numGroupsZ ) const;
/** Add an attribute location binding. */
void addBindAttribLocation( const std::string& name, GLuint index );
@@ -388,6 +392,11 @@ class OSG_EXPORT Program : public osg::StateAttribute
// todo add tessellation default level
//GLfloat _patchDefaultInnerLevel[2];
//GLfloat _patchDefaultOuterLevel[4];
/** Parameter maintained with glDispatchCompute */
GLint _numGroupsX;
GLint _numGroupsY;
GLint _numGroupsZ;
private:
Program& operator=(const Program&); // disallowed