Hello All! I'm new to OpenCL-GL interop , while trying to use clCreateFromGLBuffer() , I encountered an error CL_INVALID_CONTEXT. However, I have already declared vbo buffer and filled the buffer data .
Here are some snippets ,and their success checkpoints:
void draw_cube(float r, float g, float b)
{
glGenBuffers(1, &vboId3);
glBindBuffer(GL_ARRAY_BUFFER, vboId3);
glBufferData(GL_ARRAY_BUFFER,sizeof(color), color, GL_STATIC_DRAW);
glGenBuffers(1, &vboId);
glBindBuffer(GL_ARRAY_BUFFER, vboId);
glBufferData(GL_ARRAY_BUFFER,72*sizeof(float), vertices, GL_STATIC_DRAW);
glGenBuffers(1, &vboId2);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, vboId2);
glBufferData(GL_ELEMENT_ARRAY_BUFFER,36*sizeof(GLubyte), indices, GL_STATIC_DRAW);
cl_mem cl_vbo_mem = clCreateFromGLBuffer(clGPUContext,CL_MEM_READ_WRITE, vboId,&errcode ); [ERROR ]
checkerr(errcode);
// glBindBuffer(GL_ARRAY_BUFFER, vboId3);
//glVertexPointer(3,GL_FLOAT, 0, 0);
glColorPointer(3, GL_FLOAT, 0,0);
glVertexPointer(3, GL_FLOAT, 0, 0);
glEnableClientState(GL_COLOR_ARRAY);
glEnableClientState(GL_VERTEX_ARRAY);
printf("Pointers set\n");
printf("preparing to draw\n");
glDrawElements(GL_TRIANGLE_STRIP,36, GL_UNSIGNED_BYTE,0); [[[[[[CUBE SUCCESSFULLY DRAWN]]]]]
printf("drawn\n");
glDisableClientState(GL_COLOR_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);
}
void display()
{
...........
.....
draw_cube();
}
main()
{....;
.........;
cl_context_properties props[] = { CL_GL_CONTEXT_KHR, (cl_context_properties)wglGetCurrentContext(), CL_WGL_HDC_KHR, (cl_context_properties)wglGetCurrentDC, CL_CONTEXT_PLATFORM, (cl_context_properties)platform, 0 }; [ [SUCCESS]]
checkerr(errcode);
clGPUContext = clCreateContext(props, 1, &device[0], NULL, NULL, &errcode); [ [SUCCESS]]
checkerr(errcode);
................
....................
glutDisplayFunc(display);
}
