我正在编写一个非常简单的代码,这个代码是在cuda中通过示例书给出的,它是cuda openGL interop创建图形。该程序正在成功构建,但当我运行该程序时,窗口显示: 应用程序无法正确启动。 单击“确定”关闭应用程序。 我不知道为什么会这样,因为我有几个成功运行的示例cuda程序以及opengl示例程序。我甚至从运行成功的NVidia Sample程序运行了示例cuda openGL互操作程序。我应该在这里提一下,我已将所有lib文件包含在附加库中以及附加包含目录中包含的文件中。我相信这是因为我用于互操作的像素缓冲区导致正常的openGL和cuda程序正常运行。我还应该提一下,当我试图在程序中包含那些时,visual studio intellisense正在显示缓冲区API(如glGenBuffers等),但是在程序中声明后,它显示标识符未定义,下面有一条红线。但是在NVidia示例OpenGL代码中没有发生这种情况。
我正在粘贴以下代码:
#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <time.h>
#include <GL/glew.h>
#include <GL/glut.h>
#include <GL/glaux.h>
#include <cuda.h>
#include <cuda_runtime.h>
#include <cutil.h>
#include <cuda_gl_interop.h>
#define DIM 512
GLuint bufferObj;
cudaGraphicsResource *resource;
// based on ripple code, but uses uchar4 which is the type of data
// graphic inter op uses. see screenshot - basic2.png
__global__ void kernel( uchar4 *ptr ) {
int x = threadIdx.x + blockIdx.x * blockDim.x;
int y = threadIdx.y + blockIdx.y * blockDim.y;
int offset = x + y * blockDim.x * gridDim.x;
// now calculate the value at that position
float fx = x/(float)DIM - 0.5f;
float fy = y/(float)DIM - 0.5f;
unsigned char green = 128 + 127 *
sin( abs(fx*100) - abs(fy*100) );
// accessing uchar4 vs unsigned char*
ptr[offset].x = 0;
ptr[offset].y = green;
ptr[offset].z = 0;
ptr[offset].w = 255;
}
static void key_func( unsigned char key, int x, int y ) {
switch (key) {
case 27:
// clean up OpenGL and CUDA
cudaGraphicsUnregisterResource( resource );
glBindBuffer( GL_PIXEL_UNPACK_BUFFER_ARB, 0 );
glDeleteBuffers( 1, &bufferObj );
exit(0);
}
}
static void draw_func( void ) {
glDrawPixels( DIM, DIM, GL_RGBA, GL_UNSIGNED_BYTE, 0 );
glutSwapBuffers();
}
int main( int argc, char **argv ) {
cudaDeviceProp prop;
int dev;
memset( &prop, 0, sizeof( cudaDeviceProp ) );
prop.major = 1;
prop.minor = 0;
cudaChooseDevice( &dev, &prop );
cudaGLSetGLDevice( dev ) ;
glutInit( &argc, argv );
glutInitDisplayMode( GLUT_DOUBLE | GLUT_RGBA );
glutInitWindowSize( DIM, DIM );
glutCreateWindow( "bitmap" );
glGenBuffers( 1, &bufferObj );
glBindBuffer( GL_PIXEL_UNPACK_BUFFER_ARB, bufferObj );
glBufferData( GL_PIXEL_UNPACK_BUFFER_ARB, DIM * DIM * 4,NULL, GL_DYNAMIC_DRAW_ARB);
cudaGraphicsGLRegisterBuffer( &resource,
bufferObj,
cudaGraphicsMapFlagsNone ) ;
// do work with the memory dst being on the GPU, gotten via mapping
cudaGraphicsMapResources( 1, &resource, NULL ) ;
uchar4* devPtr;
size_t size;
cudaGraphicsResourceGetMappedPointer( (void**)&devPtr,
&size,
resource) ;
dim3 grids(DIM/16,DIM/16);
dim3 threads(16,16);
kernel<<<grids,threads>>>( devPtr );
cudaGraphicsUnmapResources( 1, &resource, NULL ) ;
glutKeyboardFunc( key_func );
glutDisplayFunc( draw_func );
glutMainLoop();
}
答案 0 :(得分:0)
glewInit()
之前不要忘记glGenBuffers()
。