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#include "boring_parts.h"
// TODO : only need OpenGL things, not GTK ones for now
//#include "gtk_includes.h"
#define RETURN_IF_FAIL(expr) do { \
int res=(expr); \
if ( res != 0 ) return res; \
} while(0)
// TODO : print streamsdk::getOpenCLErrorCodeStr(res)
#define CL_RETURN_VAL_IF_FAIL(val, expr) do { \
cl_int res=(expr); \
if ( res != CL_SUCCESS ) { \
std::cerr << "file " << __FILE__ << ": line " << __LINE__ << " (" << __PRETTY_FUNCTION__ \
<< "): '" << "expr" << "' failed (return code : " << res << ")" << std::endl; \
return val; \
} \
} while(0)
/* From http://stackoverflow.com/questions/4317062/opengl-how-to-check-if-the-user-supports-glgenbuffers
#ifndef STRINGIFY
#define STRINGIFY(x) #x
#endif
#ifdef WIN32
#include <windows.h>
#define glGetProcAddress(a) wglGetProcAddress(a)
#endif
#ifdef X11
#define glGetProcAddress(a) glXGetProcAddress ( \
reinterpret_cast<const unsigned char*>(a) \
)
#endif
#ifndef GetExtension
#define GetExtension(Type, ExtenName) \
ExtenName = (Type) \
glGetProcAddress(STRINGIFY(ExtenName)); \
if(!ExtenName) \
{ \
std:cout << "Your Computer Does Not " \
<< "Support GL Extension: " \
<< STRINGIFY(ExtenName) \
<< std::endl; \
exit(1); \
} \
else \
{ \
std::cout << "Loaded Extension: " \
<< STRINGIFY(ExtenName) \
<< std::endl; \
}
#endif
*/
#ifdef HAS_OPENCL
int initOpenCL(intptr_t gl_display, intptr_t gl_context, intptr_t gl_vbo) {
cl_uint id, numPlatforms, numDevices;
char pbuf[100];
std::string dTypeStr;
cl_platform_id *platforms, platform;
cl_device_id /* *devices, */device;
cl_context cl_ctx;
cl_command_queue cl_commandQueue;
bool usableDeviceFound=false;
// Get platform count
CL_RETURN_VAL_IF_FAIL(1,
clGetPlatformIDs(0, NULL, &numPlatforms)
);
std::cout << "Detected " << numPlatforms << " platform(s)" << std::endl;
if ( ! ( numPlatforms > 0 ) ) return 2;
// Allocate room for all platform IDs
platforms = new cl_platform_id[numPlatforms];
// Get platform IDs
CL_RETURN_VAL_IF_FAIL(3,
clGetPlatformIDs(numPlatforms, platforms, &numPlatforms)
);
// Enumerate platforms and grab informations
for(id=0;id<numPlatforms;id++) {
cl_int res;
platform=platforms[id];
CL_RETURN_VAL_IF_FAIL(4,
clGetPlatformInfo(platform, CL_PLATFORM_VENDOR, sizeof(pbuf), pbuf, NULL)
);
std::cout << "Platform " << id << " : " << pbuf << std::endl;
// Dynamically get the function pointer for clGetGLConetextInfoKHR
clGetGLContextInfoKHR_fn clGetGLContextInfoKHR_proc = (clGetGLContextInfoKHR_fn) clGetExtensionFunctionAddressForPlatform(platform, "clGetGLContextInfoKHR");
if (!clGetGLContextInfoKHR_proc) {
std::cerr << "clGetExtensionFunctionAddressForPlatform(platform, clGetGLContextInfoKHR) failed" << std::endl;
continue;
}
// Try to get the device corresponding to the GL context/display on this platform
cl_context_properties cpsGL[] = {
CL_CONTEXT_PLATFORM, (cl_context_properties)platform,
CL_GLX_DISPLAY_KHR, gl_display,
CL_GL_CONTEXT_KHR, gl_context,
0
};
std::cout << "cl_context_properties :" << std::endl;
std::cout << "\tCL_CONTEXT_PLATFORM :" << (void *)cpsGL[1] << std::endl;
std::cout << "\tCL_GLX_DISPLAY_KHR :" << (void *)cpsGL[3] << std::endl;
std::cout << "\tCL_GL_CONTEXT_KHR :" << (void *)cpsGL[5] << std::endl;
size_t deviceSize=0;
// get deviceSize (should be 1*sizeof(cl_device_id) with CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KHR)
res=clGetGLContextInfoKHR_proc(cpsGL,CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KHR,0,NULL,&deviceSize);
if ( res!=CL_SUCCESS || deviceSize!=1*sizeof(cl_device_id)) {
std::cerr << "clGetGLContextInfoKHR_proc(cpsGL,CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KHR,0,...) failed" << std::endl;
std::cerr << " (return code : " << res << ")" << std::endl;
continue;
}
device=0;
res=clGetGLContextInfoKHR_proc(cpsGL,CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KHR,deviceSize,&device,NULL);
if ( res!=CL_SUCCESS || device==0 ) {
std::cerr << "clGetGLContextInfoKHR_proc(cpsGL,CL_CURRENT_DEVICE_FOR_GL_CONTEXT_KHR,...) failed" << std::endl;
std::cerr << " (return code : " << res << ")" << std::endl;
continue;
}
std::cout << "cl_device :" << (void *)device << std::endl;
cl_ctx = clCreateContext(cpsGL,1,&device,0,0,&res);
if ( res!=CL_SUCCESS ) {
std::cerr << "clCreateContext() failed" << std::endl;
std::cerr << " (return code : " << res << ")" << std::endl;
continue;
}
cl_commandQueue = clCreateCommandQueue(cl_ctx,device,0,&res);
if ( res!=CL_SUCCESS ) {
std::cerr << "clCreateCommandQueue() failed" << std::endl;
std::cerr << " (return code : " << res << ")" << std::endl;
continue;
}
usableDeviceFound=true;
break;
}
if (! usableDeviceFound) {
std::cerr << "No OpenCL device has been successfully initialized" << std::endl;
return 1;
}
std::cout << "OpenCL initialization done." << std::endl;
return 0;
}
#endif /*HAS_OPENCL*/
bool updateGLProjectionMatrix(Glib::RefPtr<Gdk::GL::Context> glCtx, Glib::RefPtr<Gdk::GL::Window> glWin, int width, int height) {
GLdouble aspect = (GLdouble) width/height;
// *** OpenGL BEGIN ***
if (!glWin->gl_begin(glCtx)) return false;
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(60.0, aspect, 0.1, 10.0);
glMatrixMode(GL_MODELVIEW);
glWin->gl_end();
// *** OpenGL END ***
return true;
}
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