// This is where we create the OpenGL PBOs, FBOs, and texture resources
void initGLResources()
{
// create pixel buffer object
glGenBuffersARB(1, &pbo);
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbo);
glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, width*height*sizeof(GLubyte)*4, h_img, GL_STREAM_DRAW_ARB);
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
// DEPRECATED: cutilSafeCall(cudaGLRegisterBufferObject(pbo));
cutilSafeCall(cudaGraphicsGLRegisterBuffer(&cuda_pbo_resource, pbo,
cudaGraphicsMapFlagsWriteDiscard));
// create texture for display
glGenTextures(1, &texid);
glBindTexture(GL_TEXTURE_2D, texid);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glBindTexture(GL_TEXTURE_2D, 0);
// load shader program
shader = compileASMShader(GL_FRAGMENT_PROGRAM_ARB, shader_code);
if (g_FrameBufferObject) {
delete g_FrameBufferObject;
g_FrameBufferObject = NULL;
}
if (g_bFBODisplay) {
g_FrameBufferObject = new CFrameBufferObject(width, height, 32, true, GL_TEXTURE_2D);
}
}
////////////////////////////////////////////////////////////////////////////////
//! Initialize OpenGL
////////////////////////////////////////////////////////////////////////////////
CUTBoolean
initGL(int *argc, char **argv)
{
// Create GL context
glutInit(argc, argv);
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(window_width, window_height);
glutCreateWindow("CUDA Marching Cubes");
// initialize necessary OpenGL extensions
glewInit();
if (! glewIsSupported("GL_VERSION_2_0 "
)) {
fprintf(stderr, "ERROR: Support for necessary OpenGL extensions missing.");
fflush(stderr);
return CUTFalse;
}
// default initialization
glClearColor(0.1, 0.2, 0.3, 1.0);
glEnable(GL_DEPTH_TEST);
// good old-fashioned fixed function lighting
float black[] = { 0.0, 0.0, 0.0, 1.0 };
float white[] = { 1.0, 1.0, 1.0, 1.0 };
float ambient[] = { 0.1, 0.1, 0.1, 1.0 };
float diffuse[] = { 0.9, 0.9, 0.9, 1.0 };
float lightPos[] = { 0.0, 0.0, 1.0, 0.0 };
glMaterialfv(GL_FRONT_AND_BACK, GL_AMBIENT, ambient);
glMaterialfv(GL_FRONT_AND_BACK, GL_DIFFUSE, diffuse);
glMaterialfv(GL_FRONT_AND_BACK, GL_SPECULAR, black);
glLightfv(GL_LIGHT0, GL_AMBIENT, white);
glLightfv(GL_LIGHT0, GL_DIFFUSE, white);
glLightfv(GL_LIGHT0, GL_SPECULAR, white);
glLightfv(GL_LIGHT0, GL_POSITION, lightPos);
glLightModelfv(GL_LIGHT_MODEL_AMBIENT, black);
glEnable(GL_LIGHT0);
glEnable(GL_NORMALIZE);
// load shader program
gl_Shader = compileASMShader(GL_FRAGMENT_PROGRAM_ARB, shader_code);
if (g_FrameBufferObject) {
delete g_FrameBufferObject; g_FrameBufferObject = NULL;
}
if (g_bFBODisplay) {
g_FrameBufferObject = new CFrameBufferObject(window_width, window_height, 32, true, GL_TEXTURE_2D);
}
glutReportErrors();
return CUTTrue;
}
void initOpenGLBuffers()
{
printf("Creating GL texture...\n");
glEnable(GL_TEXTURE_2D);
glGenTextures(1, &gl_Tex);
glBindTexture(GL_TEXTURE_2D, gl_Tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, imageW, imageH, 0, GL_RGBA, GL_UNSIGNED_BYTE, h_Src);
printf("Texture created.\n");
printf("Creating PBO...\n");
glGenBuffers(1, &gl_PBO);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, gl_PBO);
glBufferData(GL_PIXEL_UNPACK_BUFFER_ARB, imageW * imageH * 4, h_Src, GL_STREAM_COPY);
//While a PBO is registered to CUDA, it can't be used
//as the destination for OpenGL drawing calls.
//But in our particular case OpenGL is only used
//to display the content of the PBO, specified by CUDA kernels,
//so we need to register/unregister it only once.
// DEPRECATED: checkCudaErrors(cudaGLRegisterBufferObject(gl_PBO) );
checkCudaErrors(cudaGraphicsGLRegisterBuffer(&cuda_pbo_resource, gl_PBO,
cudaGraphicsMapFlagsWriteDiscard));
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__, gluErrorString(gl_error));
OutputDebugString(tmpStr);
#endif
fprintf(stderr, "GL Error in file '%s' in line %d :\n", __FILE__, __LINE__);
fprintf(stderr, "%s\n", gluErrorString(gl_error));
exit(EXIT_FAILURE);
}
printf("PBO created.\n");
// load shader program
shader = compileASMShader(GL_FRAGMENT_PROGRAM_ARB, shader_code);
}
void initOpenGLBuffers()
{
printf("Creating GL texture...\n");
glEnable(GL_TEXTURE_2D);
glGenTextures(1, &gl_Tex);
glBindTexture(GL_TEXTURE_2D, gl_Tex);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, imageW, imageH, 0, GL_RGBA, GL_UNSIGNED_BYTE, h_Src);
printf("Texture created.\n");
printf("Creating PBO...\n");
glGenBuffers(1, &gl_PBO);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, gl_PBO);
glBufferData(GL_PIXEL_UNPACK_BUFFER_ARB, imageW * imageH * 4, h_Src, GL_STREAM_COPY);
//While a PBO is registered to CUDA, it can't be used
//as the destination for OpenGL drawing calls.
//But in our particular case OpenGL is only used
//to display the content of the PBO, specified by CUDA kernels,
//so we need to register/unregister it only once.
// DEPRECATED: cutilSafeCall( cudaGLRegisterBufferObject(gl_PBO) );
cutilSafeCall(cudaGraphicsGLRegisterBuffer(&cuda_pbo_resource, gl_PBO,
cudaGraphicsMapFlagsWriteDiscard));
CUT_CHECK_ERROR_GL();
printf("PBO created.\n");
// load shader program
shader = compileASMShader(GL_FRAGMENT_PROGRAM_ARB, shader_code);
if (g_FrameBufferObject) {
delete g_FrameBufferObject; g_FrameBufferObject = NULL;
}
if (g_bFBODisplay) {
g_FrameBufferObject = new CFrameBufferObject(imageW, imageH, 32, false, GL_TEXTURE_2D);
}
}
// This is where we create the OpenGL PBOs, FBOs, and texture resources
void initGLResources()
{
// create pixel buffer object
glGenBuffersARB(1, &pbo);
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbo);
glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, width*height*sizeof(GLubyte)*4, h_img, GL_STREAM_DRAW_ARB);
glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
checkCudaErrors(cudaGraphicsGLRegisterBuffer(&cuda_pbo_resource, pbo,
cudaGraphicsMapFlagsWriteDiscard));
// create texture for display
glGenTextures(1, &texid);
glBindTexture(GL_TEXTURE_2D, texid);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glBindTexture(GL_TEXTURE_2D, 0);
// load shader program
shader = compileASMShader(GL_FRAGMENT_PROGRAM_ARB, shader_code);
}
void initialize(int argc, char **argv)
{
printf("[%s] (OpenGL Mode)\n", sSDKsample);
// First initialize OpenGL context, so we can properly set the GL for CUDA.
// This is necessary in order to achieve optimal performance with OpenGL/CUDA interop.
initGL(&argc, argv);
int devID;
cudaDeviceProp deviceProps;
if (checkCmdLineFlag(argc, (const char **)argv, "device"))
{
devID = gpuGLDeviceInit(argc, (const char **)argv);
if (devID < 0)
{
printf("exiting...\n");
exit(EXIT_SUCCESS);
}
}
else
{
devID = gpuGetMaxGflopsDeviceId();
cudaGLSetGLDevice(devID);
}
// get number of SMs on this GPU
checkCudaErrors(cudaGetDeviceProperties(&deviceProps, devID));
printf("CUDA device [%s] has %d Multi-Processors\n", deviceProps.name, deviceProps.multiProcessorCount);
// Create the timer (for fps measurement)
sdkCreateTimer(&timer);
// load image from disk
loadImageData(argc, argv);
printf("\n"
"\tControls\n"
"\t=/- : Zoom in/out\n"
"\tb : Run Benchmark g_FilterMode\n"
"\tc : Draw Bicubic Spline Curve\n"
"\t[esc] - Quit\n\n"
"\tPress number keys to change filtering g_FilterMode:\n\n"
"\t1 : nearest filtering\n"
"\t2 : bilinear filtering\n"
"\t3 : bicubic filtering\n"
"\t4 : fast bicubic filtering\n"
"\t5 : Catmull-Rom filtering\n\n"
);
initGLBuffers();
#if USE_BUFFER_TEX
fprog = compileASMShader(GL_FRAGMENT_PROGRAM_ARB, shaderCode);
if (!fprog)
{
exit(EXIT_SUCCESS);
}
#endif
}