helper_cuda_gl.h
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/**
* Copyright 1993-2013 NVIDIA Corporation. All rights reserved.
*
* Please refer to the NVIDIA end user license agreement (EULA) associated
* with this source code for terms and conditions that govern your use of
* this software. Any use, reproduction, disclosure, or distribution of
* this software and related documentation outside the terms of the EULA
* is strictly prohibited.
*
*/
#ifndef HELPER_CUDA_GL_H
#define HELPER_CUDA_GL_H
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
// includes, graphics
#if defined (__APPLE__) || defined(MACOSX)
#include <OpenGL/gl.h>
#else
#include <GL/gl.h>
#endif
#ifndef EXIT_WAIVED
#define EXIT_WAIVED 2
#endif
#ifdef __DRIVER_TYPES_H__
#ifndef DEVICE_RESET
#define DEVICE_RESET cudaDeviceReset()
#endif
#else
#ifndef DEVICE_RESET
#define DEVICE_RESET
#endif
#endif
#ifdef __CUDA_GL_INTEROP_H__
////////////////////////////////////////////////////////////////////////////////
// These are CUDA OpenGL Helper functions
inline int gpuGLDeviceInit(int ARGC, const char **ARGV)
{
int deviceCount;
checkCudaErrors(cudaGetDeviceCount(&deviceCount));
if (deviceCount == 0)
{
fprintf(stderr, "CUDA error: no devices supporting CUDA.\n");
exit(EXIT_FAILURE);
}
int dev = 0;
dev = getCmdLineArgumentInt(ARGC, ARGV, "device=");
if (dev < 0)
{
dev = 0;
}
if (dev > deviceCount-1)
{
fprintf(stderr, "\n");
fprintf(stderr, ">> %d CUDA capable GPU device(s) detected. <<\n", deviceCount);
fprintf(stderr, ">> gpuGLDeviceInit (-device=%d) is not a valid GPU device. <<\n", dev);
fprintf(stderr, "\n");
return -dev;
}
cudaDeviceProp deviceProp;
checkCudaErrors(cudaGetDeviceProperties(&deviceProp, dev));
if (deviceProp.computeMode == cudaComputeModeProhibited)
{
fprintf(stderr, "Error: device is running in <Compute Mode Prohibited>, no threads can use ::cudaSetDevice().\n");
return -1;
}
if (deviceProp.major < 1)
{
fprintf(stderr, "Error: device does not support CUDA.\n");
exit(EXIT_FAILURE);
}
if (checkCmdLineFlag(ARGC, ARGV, "quiet") == false)
{
fprintf(stderr, "Using device %d: %s\n", dev, deviceProp.name);
}
checkCudaErrors(cudaGLSetGLDevice(dev));
return dev;
}
// This function will pick the best CUDA device available with OpenGL interop
inline int findCudaGLDevice(int argc, const char **argv)
{
int devID = 0;
// If the command-line has a device number specified, use it
if (checkCmdLineFlag(argc, (const char **)argv, "device"))
{
devID = gpuGLDeviceInit(argc, (const char **)argv);
if (devID < 0)
{
printf("no CUDA capable devices found, exiting...\n");
DEVICE_RESET
exit(EXIT_SUCCESS);
}
}
else
{
// Otherwise pick the device with highest Gflops/s
devID = gpuGetMaxGflopsDeviceId();
cudaGLSetGLDevice(devID);
}
return devID;
}
static inline const char* glErrorToString(GLenum err)
{
#define CASE_RETURN_MACRO(arg) case arg: return #arg
switch(err)
{
CASE_RETURN_MACRO(GL_NO_ERROR);
CASE_RETURN_MACRO(GL_INVALID_ENUM);
CASE_RETURN_MACRO(GL_INVALID_VALUE);
CASE_RETURN_MACRO(GL_INVALID_OPERATION);
CASE_RETURN_MACRO(GL_OUT_OF_MEMORY);
CASE_RETURN_MACRO(GL_STACK_UNDERFLOW);
CASE_RETURN_MACRO(GL_STACK_OVERFLOW);
#ifdef GL_INVALID_FRAMEBUFFER_OPERATION
CASE_RETURN_MACRO(GL_INVALID_FRAMEBUFFER_OPERATION);
#endif
default: break;
}
#undef CASE_RETURN_MACRO
return "*UNKNOWN*";
}
////////////////////////////////////////////////////////////////////////////
//! Check for OpenGL error
//! @return bool if no GL error has been encountered, otherwise 0
//! @param file __FILE__ macro
//! @param line __LINE__ macro
//! @note The GL error is listed on stderr
//! @note This function should be used via the CHECK_ERROR_GL() macro
////////////////////////////////////////////////////////////////////////////
inline bool
sdkCheckErrorGL(const char *file, const int line)
{
bool ret_val = true;
// check for error
GLenum gl_error = glGetError();
if (gl_error != GL_NO_ERROR)
{
#if defined(WIN32) || defined(_WIN32) || defined(WIN64) || defined(_WIN64)
char tmpStr[512];
// NOTE: "%s(%i) : " allows Visual Studio to directly jump to the file at the right line
// when the user double clicks on the error line in the Output pane. Like any compile error.
sprintf_s(tmpStr, 255, "\n%s(%i) : GL Error : %s\n\n", file, line, glErrorToString(gl_error));
fprintf(stderr, "%s", tmpStr);
#endif
fprintf(stderr, "GL Error in file '%s' in line %d :\n", file, line);
fprintf(stderr, "%s\n", glErrorToString(gl_error));
ret_val = false;
}
return ret_val;
}
#define SDK_CHECK_ERROR_GL() \
if( false == sdkCheckErrorGL( __FILE__, __LINE__)) { \
DEVICE_RESET \
exit(EXIT_FAILURE); \
}
#endif
#endif