add and update samples for CUDA 11.5

This commit is contained in:
Rutwik Choughule
2021-10-21 16:34:49 +05:30
parent 3342d604fe
commit 1f76a2d110
2796 changed files with 1511725 additions and 827 deletions

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{
"configurations": [
{
"name": "Linux",
"includePath": [
"${workspaceFolder}/**",
"${workspaceFolder}/../../Common"
],
"defines": [],
"compilerPath": "/usr/local/cuda/bin/nvcc",
"cStandard": "gnu17",
"cppStandard": "gnu++14",
"intelliSenseMode": "linux-gcc-x64",
"configurationProvider": "ms-vscode.makefile-tools"
}
],
"version": 4
}

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{
"recommendations": [
"nvidia.nsight-vscode-edition",
"ms-vscode.cpptools",
"ms-vscode.makefile-tools"
]
}

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{
"configurations": [
{
"name": "CUDA C++: Launch",
"type": "cuda-gdb",
"request": "launch",
"program": "${workspaceFolder}/FunctionPointers"
}
]
}

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{
"version": "2.0.0",
"tasks": [
{
"label": "sample",
"type": "shell",
"command": "make dbg=1",
"problemMatcher": ["$nvcc"],
"group": {
"kind": "build",
"isDefault": true
}
}
]
}

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/* Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of NVIDIA CORPORATION nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// OpenGL Graphics includes
#include <helper_gl.h>
#if defined(__APPLE__) || defined(MACOSX)
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
#include <GLUT/glut.h>
#ifndef glutCloseFunc
#define glutCloseFunc glutWMCloseFunc
#endif
#else
#include <GL/freeglut.h>
#endif
// Includes
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <helper_functions.h> // helper functions for timing, string parsing
#include <cuda_runtime.h> // CUDA Runtime
#include <cuda_gl_interop.h> // CUDA OpenGL interop
#include <helper_cuda.h> // includes for CUDA initialization and error checking
#include "FunctionPointers_kernels.h"
#define EXIT_WAIVED 2
//
// Cuda example code that implements the Sobel edge detection
// filter. This code works for 8-bit monochrome images.
//
// Use the '-' and '=' keys to change the scale factor.
//
// Other keys:
// I: display image
// T: display Sobel Edge Detection (computed solely with texture)
// S: display Sobel Edge Detection (computed with texture and shared memory)
void cleanup(void);
void initializeData(char *file);
#define MAX_EPSILON_ERROR 5.0f
static const char *sSDKsample = "CUDA Function Pointers (SobelFilter)";
const char *filterMode[] = {"No Filtering", "Sobel Texture",
"Sobel SMEM+Texture", NULL};
static int wWidth = 512; // Window width
static int wHeight = 512; // Window height
static int imWidth = 0; // Image width
static int imHeight = 0; // Image height
static int blockOp = 0;
static int pointOp = 1;
// Code to handle Auto verification
const int frameCheckNumber = 4;
int fpsCount = 0; // FPS count for averaging
int fpsLimit = 8; // FPS limit for sampling
unsigned int frameCount = 0;
StopWatchInterface *timer = NULL;
unsigned int g_Bpp;
int g_TotalErrors = 0;
int *pArgc = NULL;
char **pArgv = NULL;
bool g_bQAReadback = false;
// Display Data
static GLuint pbo_buffer = 0; // Front and back CA buffers
struct cudaGraphicsResource
*cuda_pbo_resource; // CUDA Graphics Resource (to transfer PBO)
static GLuint texid = 0; // Texture for display
unsigned char *pixels = NULL; // Image pixel data on the host
float imageScale = 1.f; // Image exposure
enum SobelDisplayMode g_SobelDisplayMode;
#define OFFSET(i) ((char *)NULL + (i))
#define MAX(a, b) ((a > b) ? a : b)
#define REFRESH_DELAY 10 // ms
void computeFPS() {
frameCount++;
fpsCount++;
if (fpsCount == fpsLimit) {
char fps[256];
float ifps = 1.f / (sdkGetAverageTimerValue(&timer) / 1000.f);
sprintf(fps, "FunctionPointers [CUDA Edge Detection] (%s): %3.1f fps",
filterMode[g_SobelDisplayMode], ifps);
glutSetWindowTitle(fps);
fpsCount = 0;
fpsLimit = (int)MAX(ifps, 1.f);
sdkResetTimer(&timer);
}
}
// This is the normal display path
void display(void) {
sdkStartTimer(&timer);
// Sobel operation
Pixel *data = NULL;
// map PBO to get CUDA device pointer
checkCudaErrors(cudaGraphicsMapResources(1, &cuda_pbo_resource, 0));
size_t num_bytes;
checkCudaErrors(cudaGraphicsResourceGetMappedPointer(
(void **)&data, &num_bytes, cuda_pbo_resource));
// printf("CUDA mapped PBO: May access %ld bytes\n", num_bytes);
sobelFilter(data, imWidth, imHeight, g_SobelDisplayMode, imageScale, blockOp,
pointOp);
checkCudaErrors(cudaGraphicsUnmapResources(1, &cuda_pbo_resource, 0));
glClear(GL_COLOR_BUFFER_BIT);
glBindTexture(GL_TEXTURE_2D, texid);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbo_buffer);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, imWidth, imHeight, GL_LUMINANCE,
GL_UNSIGNED_BYTE, OFFSET(0));
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glDisable(GL_DEPTH_TEST);
glEnable(GL_TEXTURE_2D);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glBegin(GL_QUADS);
glVertex2f(0, 0);
glTexCoord2f(0, 0);
glVertex2f(0, 1);
glTexCoord2f(1, 0);
glVertex2f(1, 1);
glTexCoord2f(1, 1);
glVertex2f(1, 0);
glTexCoord2f(0, 1);
glEnd();
glBindTexture(GL_TEXTURE_2D, 0);
glutSwapBuffers();
sdkStopTimer(&timer);
computeFPS();
}
void timerEvent(int value) {
if (glutGetWindow()) {
glutPostRedisplay();
glutTimerFunc(REFRESH_DELAY, timerEvent, 0);
}
}
void keyboard(unsigned char key, int /*x*/, int /*y*/) {
char temp[256];
switch (key) {
case 27:
#if defined(__APPLE__) || defined(MACOSX)
exit(EXIT_SUCCESS);
#else
glutDestroyWindow(glutGetWindow());
return;
#endif
break;
case '-':
imageScale -= 0.1f;
printf("brightness = %4.2f\n", imageScale);
break;
case '=':
imageScale += 0.1f;
printf("brightness = %4.2f\n", imageScale);
break;
case 'i':
case 'I':
g_SobelDisplayMode = SOBELDISPLAY_IMAGE;
sprintf(temp, "Function Pointers [CUDA Edge Detection] (%s)",
filterMode[g_SobelDisplayMode]);
glutSetWindowTitle(temp);
break;
case 's':
case 'S':
g_SobelDisplayMode = SOBELDISPLAY_SOBELSHARED;
sprintf(temp, "Function Pointers [CUDA Edge Detection] (%s)",
filterMode[g_SobelDisplayMode]);
glutSetWindowTitle(temp);
break;
case 't':
case 'T':
g_SobelDisplayMode = SOBELDISPLAY_SOBELTEX;
sprintf(temp, "Function Pointers [CUDA Edge Detection] (%s)",
filterMode[g_SobelDisplayMode]);
glutSetWindowTitle(temp);
break;
case 'b':
case 'B':
blockOp = (blockOp + 1) % LAST_BLOCK_FILTER;
break;
case 'p':
case 'P':
pointOp = (pointOp + 1) % LAST_POINT_FILTER;
break;
default:
break;
}
}
void reshape(int x, int y) {
glViewport(0, 0, x, y);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrtho(0, 1, 0, 1, 0, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void cleanup(void) {
cudaGraphicsUnregisterResource(cuda_pbo_resource);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
glDeleteBuffers(1, &pbo_buffer);
glDeleteTextures(1, &texid);
deleteTexture();
sdkDeleteTimer(&timer);
}
void initializeData(char *file) {
GLint bsize;
unsigned int w, h;
size_t file_length = strlen(file);
if (!strcmp(&file[file_length - 3], "pgm")) {
if (sdkLoadPGM<unsigned char>(file, &pixels, &w, &h) != true) {
printf("Failed to load PGM image file: %s\n", file);
exit(EXIT_FAILURE);
}
g_Bpp = 1;
} else if (!strcmp(&file[file_length - 3], "ppm")) {
if (sdkLoadPPM4(file, &pixels, &w, &h) != true) {
printf("Failed to load PPM image file: %s\n", file);
exit(EXIT_FAILURE);
}
g_Bpp = 4;
} else {
exit(EXIT_FAILURE);
}
imWidth = (int)w;
imHeight = (int)h;
setupTexture(imWidth, imHeight, pixels, g_Bpp);
// copy function pointer tables to host side for later use
setupFunctionTables();
memset(pixels, 0x0, g_Bpp * sizeof(Pixel) * imWidth * imHeight);
if (!g_bQAReadback) {
// use OpenGL Path
glGenBuffers(1, &pbo_buffer);
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbo_buffer);
glBufferData(GL_PIXEL_UNPACK_BUFFER,
g_Bpp * sizeof(Pixel) * imWidth * imHeight, pixels,
GL_STREAM_DRAW);
glGetBufferParameteriv(GL_PIXEL_UNPACK_BUFFER, GL_BUFFER_SIZE, &bsize);
if ((GLuint)bsize != (g_Bpp * sizeof(Pixel) * imWidth * imHeight)) {
printf("Buffer object (%d) has incorrect size (%d).\n",
(unsigned)pbo_buffer, (unsigned)bsize);
exit(EXIT_FAILURE);
}
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
// register this buffer object with CUDA
checkCudaErrors(cudaGraphicsGLRegisterBuffer(
&cuda_pbo_resource, pbo_buffer, cudaGraphicsMapFlagsWriteDiscard));
glGenTextures(1, &texid);
glBindTexture(GL_TEXTURE_2D, texid);
glTexImage2D(GL_TEXTURE_2D, 0, ((g_Bpp == 1) ? GL_LUMINANCE : GL_BGRA),
imWidth, imHeight, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, NULL);
glBindTexture(GL_TEXTURE_2D, 0);
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glPixelStorei(GL_PACK_ALIGNMENT, 1);
}
}
void loadDefaultImage(char *loc_exec) {
printf("Reading image: lena.pgm\n");
const char *image_filename = "lena.pgm";
char *image_path = sdkFindFilePath(image_filename, loc_exec);
if (image_path == NULL) {
printf("Failed to read image file: <%s>\n", image_filename);
exit(EXIT_FAILURE);
}
initializeData(image_path);
free(image_path);
}
void initGL(int *argc, char **argv) {
glutInit(argc, argv);
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE);
glutInitWindowSize(wWidth, wHeight);
glutCreateWindow("Function Pointers [CUDA Edge Detection]n");
if (!isGLVersionSupported(1, 5) ||
!areGLExtensionsSupported(
"GL_ARB_vertex_buffer_object GL_ARB_pixel_buffer_object")) {
fprintf(stderr, "Error: failed to get minimal extensions for demo\n");
fprintf(stderr, "This sample requires:\n");
fprintf(stderr, " OpenGL version 1.5\n");
fprintf(stderr, " GL_ARB_vertex_buffer_object\n");
fprintf(stderr, " GL_ARB_pixel_buffer_object\n");
exit(EXIT_WAIVED);
}
}
void runAutoTest(int argc, char *argv[]) {
printf("[%s] (automated testing w/ readback)\n", sSDKsample);
int devID = findCudaDevice(argc, (const char **)argv);
loadDefaultImage(argv[0]);
Pixel *d_result;
checkCudaErrors(
cudaMalloc((void **)&d_result, imWidth * imHeight * sizeof(Pixel)));
char *ref_file = NULL;
char dump_file[256];
int mode = 0;
mode = getCmdLineArgumentInt(argc, (const char **)argv, "mode");
getCmdLineArgumentString(argc, (const char **)argv, "file", &ref_file);
switch (mode) {
case 0:
g_SobelDisplayMode = SOBELDISPLAY_IMAGE;
sprintf(dump_file, "lena_orig.pgm");
break;
case 1:
g_SobelDisplayMode = SOBELDISPLAY_SOBELTEX;
sprintf(dump_file, "lena_tex.pgm");
break;
case 2:
g_SobelDisplayMode = SOBELDISPLAY_SOBELSHARED;
sprintf(dump_file, "lena_shared.pgm");
break;
default:
printf("Invalid Filter Mode File\n");
exit(EXIT_FAILURE);
break;
}
printf("AutoTest: %s <%s>\n", sSDKsample, filterMode[g_SobelDisplayMode]);
sobelFilter(d_result, imWidth, imHeight, g_SobelDisplayMode, imageScale,
blockOp, pointOp);
checkCudaErrors(cudaDeviceSynchronize());
unsigned char *h_result =
(unsigned char *)malloc(imWidth * imHeight * sizeof(Pixel));
checkCudaErrors(cudaMemcpy(h_result, d_result,
imWidth * imHeight * sizeof(Pixel),
cudaMemcpyDeviceToHost));
sdkSavePGM(dump_file, h_result, imWidth, imHeight);
if (!sdkComparePGM(dump_file, sdkFindFilePath(ref_file, argv[0]),
MAX_EPSILON_ERROR, 0.15f, false)) {
g_TotalErrors++;
}
checkCudaErrors(cudaFree(d_result));
free(h_result);
if (g_TotalErrors != 0) {
printf("Test failed!\n");
exit(EXIT_FAILURE);
}
printf("Test passed!\n");
exit(EXIT_SUCCESS);
}
int main(int argc, char **argv) {
pArgc = &argc;
pArgv = argv;
#if defined(__linux__)
setenv("DISPLAY", ":0", 0);
#endif
printf("%s Starting...\n\n", argv[0]);
if (checkCmdLineFlag(argc, (const char **)argv, "help")) {
printf("\nUsage: FunctionPointers (SobelFilter) <options>\n");
printf("\t\t-mode=n (0=original, 1=texture, 2=smem + texture)\n");
printf("\t\t-file=ref_orig.pgm (ref_tex.pgm, ref_shared.pgm)\n\n");
exit(EXIT_WAIVED);
}
if (checkCmdLineFlag(argc, (const char **)argv, "file")) {
g_bQAReadback = true;
runAutoTest(argc, argv);
}
// use command-line specified CUDA device, otherwise use device with highest
// Gflops/s
if (checkCmdLineFlag(argc, (const char **)argv, "device")) {
printf(
" This SDK does not explicitly support -device=n when running with "
"OpenGL.\n");
printf(
" When specifying -device=n (n=0,1,2,....) the sample must not use "
"OpenGL.\n");
printf(" See details below to run without OpenGL:\n\n");
printf(" > %s -device=n\n\n", argv[0]);
printf("exiting...\n");
exit(EXIT_WAIVED);
}
if (!g_bQAReadback) {
// 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 dev = findCudaDevice(argc, (const char **)argv);
sdkCreateTimer(&timer);
sdkResetTimer(&timer);
glutDisplayFunc(display);
glutKeyboardFunc(keyboard);
glutReshapeFunc(reshape);
loadDefaultImage(argv[0]);
// If code is not printing the USage, then we execute this path.
printf("I: display Image (no filtering)\n");
printf("T: display Sobel Edge Detection (Using Texture)\n");
printf("S: display Sobel Edge Detection (Using SMEM+Texture)\n");
printf("Use the '-' and '=' keys to change the brightness.\n");
printf("b: switch block filter operation (Mean/Sobel)\n");
printf("p: switch point filter operation (Threshold ON/OFF)\n");
fflush(stdout);
#if defined(__APPLE__) || defined(MACOSX)
atexit(cleanup);
#else
glutCloseFunc(cleanup);
#endif
glutTimerFunc(REFRESH_DELAY, timerEvent, 0);
glutMainLoop();
}
}

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/* Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of NVIDIA CORPORATION nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <cooperative_groups.h>
namespace cg = cooperative_groups;
#include <helper_cuda.h>
#include "FunctionPointers_kernels.h"
// Texture object for reading image
cudaTextureObject_t tex;
extern __shared__ unsigned char LocalBlock[];
static cudaArray *array = NULL;
#define RADIUS 1
// pixel value used for thresholding function,
// works well with sample image 'lena'
#define THRESHOLD 150.0f
#ifdef FIXED_BLOCKWIDTH
#define BlockWidth 80
#define SharedPitch 384
#endif
// A function pointer can be declared explicitly like this line:
//__device__ unsigned char (*pointFunction)(unsigned char, float ) = NULL;
// or by using typedef's like below:
typedef unsigned char (*blockFunction_t)(unsigned char, unsigned char,
unsigned char, unsigned char,
unsigned char, unsigned char,
unsigned char, unsigned char,
unsigned char, float);
typedef unsigned char (*pointFunction_t)(unsigned char, float);
__device__ blockFunction_t blockFunction;
__device__ unsigned char ComputeSobel(unsigned char ul, // upper left
unsigned char um, // upper middle
unsigned char ur, // upper right
unsigned char ml, // middle left
unsigned char mm, // middle (unused)
unsigned char mr, // middle right
unsigned char ll, // lower left
unsigned char lm, // lower middle
unsigned char lr, // lower right
float fScale) {
short Horz = ur + 2 * mr + lr - ul - 2 * ml - ll;
short Vert = ul + 2 * um + ur - ll - 2 * lm - lr;
short Sum = (short)(fScale * (abs((int)Horz) + abs((int)Vert)));
return (unsigned char)((Sum < 0) ? 0 : ((Sum > 255) ? 255 : Sum));
}
// define a function pointer and initialize to NULL
__device__ unsigned char (*varFunction)(unsigned char, unsigned char,
unsigned char, unsigned char,
unsigned char, unsigned char,
unsigned char, unsigned char,
unsigned char, float x) = NULL;
__device__ unsigned char ComputeBox(unsigned char ul, // upper left
unsigned char um, // upper middle
unsigned char ur, // upper right
unsigned char ml, // middle left
unsigned char mm, // middle...middle
unsigned char mr, // middle right
unsigned char ll, // lower left
unsigned char lm, // lower middle
unsigned char lr, // lower right
float fscale) {
short Sum = (short)(ul + um + ur + ml + mm + mr + ll + lm + lr) / 9;
Sum *= fscale;
return (unsigned char)((Sum < 0) ? 0 : ((Sum > 255) ? 255 : Sum));
}
__device__ unsigned char Threshold(unsigned char in, float thresh) {
if (in > thresh) {
return 0xFF;
} else {
return 0;
}
}
// Declare function tables, one for the point function chosen, one for the
// block function chosen. The number of entries is determined by the
// enum in FunctionPointers_kernels.h
__device__ blockFunction_t blockFunction_table[LAST_BLOCK_FILTER];
__device__ pointFunction_t pointFunction_table[LAST_POINT_FILTER];
// Declare device side function pointers. We retrieve them later with
// cudaMemcpyFromSymbol to set our function tables above in some
// particular order specified at runtime.
__device__ blockFunction_t pComputeSobel = ComputeSobel;
__device__ blockFunction_t pComputeBox = ComputeBox;
__device__ pointFunction_t pComputeThreshold = Threshold;
// Allocate host side tables to mirror the device side, and later, we
// fill these tables with the function pointers. This lets us send
// the pointers to the kernel on invocation, as a method of choosing
// which function to run.
blockFunction_t h_blockFunction_table[2];
pointFunction_t h_pointFunction_table[2];
// Perform a filter operation on the data, using shared memory
// The actual operation performed is
// determined by the function pointer "blockFunction" and selected
// by the integer argument "blockOperation" and has access
// to an apron around the current pixel being processed.
// Following the block operation, a per-pixel operation,
// pointed to by pPointFunction is performed before the final
// pixel is produced.
__global__ void SobelShared(uchar4 *pSobelOriginal, unsigned short SobelPitch,
#ifndef FIXED_BLOCKWIDTH
short BlockWidth, short SharedPitch,
#endif
short w, short h, float fScale, int blockOperation,
pointFunction_t pPointFunction,
cudaTextureObject_t tex) {
// Handle to thread block group
cg::thread_block cta = cg::this_thread_block();
short u = 4 * blockIdx.x * BlockWidth;
short v = blockIdx.y * blockDim.y + threadIdx.y;
short ib;
int SharedIdx = threadIdx.y * SharedPitch;
for (ib = threadIdx.x; ib < BlockWidth + 2 * RADIUS; ib += blockDim.x) {
LocalBlock[SharedIdx + 4 * ib + 0] = tex2D<unsigned char>(
tex, (float)(u + 4 * ib - RADIUS + 0), (float)(v - RADIUS));
LocalBlock[SharedIdx + 4 * ib + 1] = tex2D<unsigned char>(
tex, (float)(u + 4 * ib - RADIUS + 1), (float)(v - RADIUS));
LocalBlock[SharedIdx + 4 * ib + 2] = tex2D<unsigned char>(
tex, (float)(u + 4 * ib - RADIUS + 2), (float)(v - RADIUS));
LocalBlock[SharedIdx + 4 * ib + 3] = tex2D<unsigned char>(
tex, (float)(u + 4 * ib - RADIUS + 3), (float)(v - RADIUS));
}
if (threadIdx.y < RADIUS * 2) {
//
// copy trailing RADIUS*2 rows of pixels into shared
//
SharedIdx = (blockDim.y + threadIdx.y) * SharedPitch;
for (ib = threadIdx.x; ib < BlockWidth + 2 * RADIUS; ib += blockDim.x) {
LocalBlock[SharedIdx + 4 * ib + 0] =
tex2D<unsigned char>(tex, (float)(u + 4 * ib - RADIUS + 0),
(float)(v + blockDim.y - RADIUS));
LocalBlock[SharedIdx + 4 * ib + 1] =
tex2D<unsigned char>(tex, (float)(u + 4 * ib - RADIUS + 1),
(float)(v + blockDim.y - RADIUS));
LocalBlock[SharedIdx + 4 * ib + 2] =
tex2D<unsigned char>(tex, (float)(u + 4 * ib - RADIUS + 2),
(float)(v + blockDim.y - RADIUS));
LocalBlock[SharedIdx + 4 * ib + 3] =
tex2D<unsigned char>(tex, (float)(u + 4 * ib - RADIUS + 3),
(float)(v + blockDim.y - RADIUS));
}
}
cg::sync(cta);
u >>= 2; // index as uchar4 from here
uchar4 *pSobel = (uchar4 *)(((char *)pSobelOriginal) + v * SobelPitch);
SharedIdx = threadIdx.y * SharedPitch;
blockFunction = blockFunction_table[blockOperation];
for (ib = threadIdx.x; ib < BlockWidth; ib += blockDim.x) {
uchar4 out;
unsigned char pix00 = LocalBlock[SharedIdx + 4 * ib + 0 * SharedPitch + 0];
unsigned char pix01 = LocalBlock[SharedIdx + 4 * ib + 0 * SharedPitch + 1];
unsigned char pix02 = LocalBlock[SharedIdx + 4 * ib + 0 * SharedPitch + 2];
unsigned char pix10 = LocalBlock[SharedIdx + 4 * ib + 1 * SharedPitch + 0];
unsigned char pix11 = LocalBlock[SharedIdx + 4 * ib + 1 * SharedPitch + 1];
unsigned char pix12 = LocalBlock[SharedIdx + 4 * ib + 1 * SharedPitch + 2];
unsigned char pix20 = LocalBlock[SharedIdx + 4 * ib + 2 * SharedPitch + 0];
unsigned char pix21 = LocalBlock[SharedIdx + 4 * ib + 2 * SharedPitch + 1];
unsigned char pix22 = LocalBlock[SharedIdx + 4 * ib + 2 * SharedPitch + 2];
out.x = (*blockFunction)(pix00, pix01, pix02, pix10, pix11, pix12, pix20,
pix21, pix22, fScale);
pix00 = LocalBlock[SharedIdx + 4 * ib + 0 * SharedPitch + 3];
pix10 = LocalBlock[SharedIdx + 4 * ib + 1 * SharedPitch + 3];
pix20 = LocalBlock[SharedIdx + 4 * ib + 2 * SharedPitch + 3];
out.y = (*blockFunction)(pix01, pix02, pix00, pix11, pix12, pix10, pix21,
pix22, pix20, fScale);
pix01 = LocalBlock[SharedIdx + 4 * ib + 0 * SharedPitch + 4];
pix11 = LocalBlock[SharedIdx + 4 * ib + 1 * SharedPitch + 4];
pix21 = LocalBlock[SharedIdx + 4 * ib + 2 * SharedPitch + 4];
out.z = (*blockFunction)(pix02, pix00, pix01, pix12, pix10, pix11, pix22,
pix20, pix21, fScale);
pix02 = LocalBlock[SharedIdx + 4 * ib + 0 * SharedPitch + 5];
pix12 = LocalBlock[SharedIdx + 4 * ib + 1 * SharedPitch + 5];
pix22 = LocalBlock[SharedIdx + 4 * ib + 2 * SharedPitch + 5];
out.w = (*blockFunction)(pix00, pix01, pix02, pix10, pix11, pix12, pix20,
pix21, pix22, fScale);
if (pPointFunction != NULL) {
out.x = (*pPointFunction)(out.x, THRESHOLD);
out.y = (*pPointFunction)(out.y, THRESHOLD);
out.z = (*pPointFunction)(out.z, THRESHOLD);
out.w = (*pPointFunction)(out.w, THRESHOLD);
}
if (u + ib < w / 4 && v < h) {
pSobel[u + ib] = out;
}
}
cg::sync(cta);
}
__global__ void SobelCopyImage(Pixel *pSobelOriginal, unsigned int Pitch, int w,
int h, float fscale, cudaTextureObject_t tex) {
unsigned char *pSobel =
(unsigned char *)(((char *)pSobelOriginal) + blockIdx.x * Pitch);
for (int i = threadIdx.x; i < w; i += blockDim.x) {
pSobel[i] = min(
max((tex2D<unsigned char>(tex, (float)i, (float)blockIdx.x) * fscale),
0.f),
255.f);
}
}
// Perform block and pointer filtering using texture lookups.
// The block and point operations are determined by the
// input argument (see comment above for "SobelShared" function)
__global__ void SobelTex(Pixel *pSobelOriginal, unsigned int Pitch, int w,
int h, float fScale, int blockOperation,
pointFunction_t pPointOperation,
cudaTextureObject_t tex) {
unsigned char *pSobel =
(unsigned char *)(((char *)pSobelOriginal) + blockIdx.x * Pitch);
unsigned char tmp = 0;
for (int i = threadIdx.x; i < w; i += blockDim.x) {
unsigned char pix00 =
tex2D<unsigned char>(tex, (float)i - 1, (float)blockIdx.x - 1);
unsigned char pix01 =
tex2D<unsigned char>(tex, (float)i + 0, (float)blockIdx.x - 1);
unsigned char pix02 =
tex2D<unsigned char>(tex, (float)i + 1, (float)blockIdx.x - 1);
unsigned char pix10 =
tex2D<unsigned char>(tex, (float)i - 1, (float)blockIdx.x + 0);
unsigned char pix11 =
tex2D<unsigned char>(tex, (float)i + 0, (float)blockIdx.x + 0);
unsigned char pix12 =
tex2D<unsigned char>(tex, (float)i + 1, (float)blockIdx.x + 0);
unsigned char pix20 =
tex2D<unsigned char>(tex, (float)i - 1, (float)blockIdx.x + 1);
unsigned char pix21 =
tex2D<unsigned char>(tex, (float)i + 0, (float)blockIdx.x + 1);
unsigned char pix22 =
tex2D<unsigned char>(tex, (float)i + 1, (float)blockIdx.x + 1);
tmp = (*(blockFunction_table[blockOperation]))(
pix00, pix01, pix02, pix10, pix11, pix12, pix20, pix21, pix22, fScale);
if (pPointOperation != NULL) {
tmp = (*pPointOperation)(tmp, 150.0);
}
pSobel[i] = tmp;
}
}
extern "C" void setupTexture(int iw, int ih, Pixel *data, int Bpp) {
cudaChannelFormatDesc desc;
if (Bpp == 1) {
desc = cudaCreateChannelDesc<unsigned char>();
} else {
desc = cudaCreateChannelDesc<uchar4>();
}
checkCudaErrors(cudaMallocArray(&array, &desc, iw, ih));
checkCudaErrors(cudaMemcpy2DToArray(
array, 0, 0, data, iw * Bpp * sizeof(Pixel), iw * Bpp * sizeof(Pixel), ih,
cudaMemcpyHostToDevice));
cudaResourceDesc texRes;
memset(&texRes, 0, sizeof(cudaResourceDesc));
texRes.resType = cudaResourceTypeArray;
texRes.res.array.array = array;
cudaTextureDesc texDescr;
memset(&texDescr, 0, sizeof(cudaTextureDesc));
checkCudaErrors(cudaCreateTextureObject(&tex, &texRes, &texDescr, NULL));
}
extern "C" void deleteTexture(void) {
checkCudaErrors(cudaFreeArray(array));
checkCudaErrors(cudaDestroyTextureObject(tex));
}
// Copy the pointers from the function tables to the host side
void setupFunctionTables() {
// Dynamically assign the function table.
// Copy the function pointers to their appropriate locations according to the
// enum
checkCudaErrors(cudaMemcpyFromSymbol(&h_blockFunction_table[SOBEL_FILTER],
pComputeSobel, sizeof(blockFunction_t)));
checkCudaErrors(cudaMemcpyFromSymbol(&h_blockFunction_table[BOX_FILTER],
pComputeBox, sizeof(blockFunction_t)));
// do the same for the point function, where the 2nd function is NULL ("no-op"
// filter, skipped in kernel code)
checkCudaErrors(cudaMemcpyFromSymbol(&h_pointFunction_table[THRESHOLD_FILTER],
pComputeThreshold,
sizeof(pointFunction_t)));
h_pointFunction_table[NULL_FILTER] = NULL;
// now copy the function tables back to the device, so if we wish we can use
// an index into the table to choose them
// We have now set the order in the function table according to our enum.
checkCudaErrors(
cudaMemcpyToSymbol(blockFunction_table, h_blockFunction_table,
sizeof(blockFunction_t) * LAST_BLOCK_FILTER));
checkCudaErrors(
cudaMemcpyToSymbol(pointFunction_table, h_pointFunction_table,
sizeof(pointFunction_t) * LAST_POINT_FILTER));
}
// Wrapper for the __global__ call that sets up the texture and threads
// Below two methods for selecting the image processing function to run are
// shown.
// BlockOperation is an integer kernel argument used as an index into the
// blockFunction_table on the device side
// pPointOp is itself a function pointer passed as a kernel argument, retrieved
// from a host side copy of the function table
extern "C" void sobelFilter(Pixel *odata, int iw, int ih,
enum SobelDisplayMode mode, float fScale,
int blockOperation, int pointOperation) {
pointFunction_t pPointOp = h_pointFunction_table[pointOperation];
switch (mode) {
case SOBELDISPLAY_IMAGE:
SobelCopyImage<<<ih, 384>>>(odata, iw, iw, ih, fScale, tex);
break;
case SOBELDISPLAY_SOBELTEX:
SobelTex<<<ih, 384>>>(odata, iw, iw, ih, fScale, blockOperation, pPointOp,
tex);
break;
case SOBELDISPLAY_SOBELSHARED: {
dim3 threads(16, 4);
#ifndef FIXED_BLOCKWIDTH
int BlockWidth = 80; // must be divisible by 16 for coalescing
#endif
dim3 blocks = dim3(iw / (4 * BlockWidth) + (0 != iw % (4 * BlockWidth)),
ih / threads.y + (0 != ih % threads.y));
int SharedPitch = ~0x3f & (4 * (BlockWidth + 2 * RADIUS) + 0x3f);
int sharedMem = SharedPitch * (threads.y + 2 * RADIUS);
// for the shared kernel, width must be divisible by 4
iw &= ~3;
SobelShared<<<blocks, threads, sharedMem>>>(
(uchar4 *)odata, iw,
#ifndef FIXED_BLOCKWIDTH
BlockWidth, SharedPitch,
#endif
iw, ih, fScale, blockOperation, pPointOp, tex);
} break;
}
}

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/* Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of NVIDIA CORPORATION nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __SOBELFILTER_KERNELS_H_
#define __SOBELFILTER_KERNELS_H_
typedef unsigned char Pixel;
// global determines which filter to invoke
enum SobelDisplayMode {
SOBELDISPLAY_IMAGE = 0,
SOBELDISPLAY_SOBELTEX,
SOBELDISPLAY_SOBELSHARED
};
// Enums to set up the function table
// note: if you change these be sure to recompile those files
// that include this header or ensure the .h is in the
// dependencies for the related object files
enum POINT_ENUM { SOBEL_FILTER = 0, BOX_FILTER, LAST_POINT_FILTER };
enum BLOCK_ENUM { THRESHOLD_FILTER = 0, NULL_FILTER, LAST_BLOCK_FILTER };
extern enum SobelDisplayMode g_SobelDisplayMode;
extern "C" void sobelFilter(Pixel *odata, int iw, int ih,
enum SobelDisplayMode mode, float fScale,
int blockOperation, int pointOperation);
extern "C" void setupTexture(int iw, int ih, Pixel *data, int Bpp);
extern "C" void deleteTexture(void);
extern "C" void initFilter(void);
void setupFunctionTables();
#endif

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Microsoft Visual Studio Solution File, Format Version 12.00
# Visual Studio 2017
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Microsoft Visual Studio Solution File, Format Version 12.00
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################################################################################
# Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of NVIDIA CORPORATION nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
################################################################################
#
# Makefile project only supported on Mac OS X and Linux Platforms)
#
################################################################################
# Location of the CUDA Toolkit
CUDA_PATH ?= /usr/local/cuda
##############################
# start deprecated interface #
##############################
ifeq ($(x86_64),1)
$(info WARNING - x86_64 variable has been deprecated)
$(info WARNING - please use TARGET_ARCH=x86_64 instead)
TARGET_ARCH ?= x86_64
endif
ifeq ($(ARMv7),1)
$(info WARNING - ARMv7 variable has been deprecated)
$(info WARNING - please use TARGET_ARCH=armv7l instead)
TARGET_ARCH ?= armv7l
endif
ifeq ($(aarch64),1)
$(info WARNING - aarch64 variable has been deprecated)
$(info WARNING - please use TARGET_ARCH=aarch64 instead)
TARGET_ARCH ?= aarch64
endif
ifeq ($(ppc64le),1)
$(info WARNING - ppc64le variable has been deprecated)
$(info WARNING - please use TARGET_ARCH=ppc64le instead)
TARGET_ARCH ?= ppc64le
endif
ifneq ($(GCC),)
$(info WARNING - GCC variable has been deprecated)
$(info WARNING - please use HOST_COMPILER=$(GCC) instead)
HOST_COMPILER ?= $(GCC)
endif
ifneq ($(abi),)
$(error ERROR - abi variable has been removed)
endif
############################
# end deprecated interface #
############################
# architecture
HOST_ARCH := $(shell uname -m)
TARGET_ARCH ?= $(HOST_ARCH)
ifneq (,$(filter $(TARGET_ARCH),x86_64 aarch64 sbsa ppc64le armv7l))
ifneq ($(TARGET_ARCH),$(HOST_ARCH))
ifneq (,$(filter $(TARGET_ARCH),x86_64 aarch64 sbsa ppc64le))
TARGET_SIZE := 64
else ifneq (,$(filter $(TARGET_ARCH),armv7l))
TARGET_SIZE := 32
endif
else
TARGET_SIZE := $(shell getconf LONG_BIT)
endif
else
$(error ERROR - unsupported value $(TARGET_ARCH) for TARGET_ARCH!)
endif
# sbsa and aarch64 systems look similar. Need to differentiate them at host level for now.
ifeq ($(HOST_ARCH),aarch64)
ifeq ($(CUDA_PATH)/targets/sbsa-linux,$(shell ls -1d $(CUDA_PATH)/targets/sbsa-linux 2>/dev/null))
HOST_ARCH := sbsa
TARGET_ARCH := sbsa
endif
endif
ifneq ($(TARGET_ARCH),$(HOST_ARCH))
ifeq (,$(filter $(HOST_ARCH)-$(TARGET_ARCH),aarch64-armv7l x86_64-armv7l x86_64-aarch64 x86_64-sbsa x86_64-ppc64le))
$(error ERROR - cross compiling from $(HOST_ARCH) to $(TARGET_ARCH) is not supported!)
endif
endif
# When on native aarch64 system with userspace of 32-bit, change TARGET_ARCH to armv7l
ifeq ($(HOST_ARCH)-$(TARGET_ARCH)-$(TARGET_SIZE),aarch64-aarch64-32)
TARGET_ARCH = armv7l
endif
# operating system
HOST_OS := $(shell uname -s 2>/dev/null | tr "[:upper:]" "[:lower:]")
TARGET_OS ?= $(HOST_OS)
ifeq (,$(filter $(TARGET_OS),linux darwin qnx android))
$(error ERROR - unsupported value $(TARGET_OS) for TARGET_OS!)
endif
# host compiler
ifeq ($(TARGET_OS),darwin)
ifeq ($(shell expr `xcodebuild -version | grep -i xcode | awk '{print $$2}' | cut -d'.' -f1` \>= 5),1)
HOST_COMPILER ?= clang++
endif
else ifneq ($(TARGET_ARCH),$(HOST_ARCH))
ifeq ($(HOST_ARCH)-$(TARGET_ARCH),x86_64-armv7l)
ifeq ($(TARGET_OS),linux)
HOST_COMPILER ?= arm-linux-gnueabihf-g++
else ifeq ($(TARGET_OS),qnx)
ifeq ($(QNX_HOST),)
$(error ERROR - QNX_HOST must be passed to the QNX host toolchain)
endif
ifeq ($(QNX_TARGET),)
$(error ERROR - QNX_TARGET must be passed to the QNX target toolchain)
endif
export QNX_HOST
export QNX_TARGET
HOST_COMPILER ?= $(QNX_HOST)/usr/bin/arm-unknown-nto-qnx6.6.0eabi-g++
else ifeq ($(TARGET_OS),android)
HOST_COMPILER ?= arm-linux-androideabi-g++
endif
else ifeq ($(TARGET_ARCH),aarch64)
ifeq ($(TARGET_OS), linux)
HOST_COMPILER ?= aarch64-linux-gnu-g++
else ifeq ($(TARGET_OS),qnx)
ifeq ($(QNX_HOST),)
$(error ERROR - QNX_HOST must be passed to the QNX host toolchain)
endif
ifeq ($(QNX_TARGET),)
$(error ERROR - QNX_TARGET must be passed to the QNX target toolchain)
endif
export QNX_HOST
export QNX_TARGET
HOST_COMPILER ?= $(QNX_HOST)/usr/bin/q++
else ifeq ($(TARGET_OS), android)
HOST_COMPILER ?= aarch64-linux-android-clang++
endif
else ifeq ($(TARGET_ARCH),sbsa)
HOST_COMPILER ?= aarch64-linux-gnu-g++
else ifeq ($(TARGET_ARCH),ppc64le)
HOST_COMPILER ?= powerpc64le-linux-gnu-g++
endif
endif
HOST_COMPILER ?= g++
NVCC := $(CUDA_PATH)/bin/nvcc -ccbin $(HOST_COMPILER)
# internal flags
NVCCFLAGS := -m${TARGET_SIZE}
CCFLAGS :=
LDFLAGS :=
# build flags
ifeq ($(TARGET_OS),darwin)
LDFLAGS += -rpath $(CUDA_PATH)/lib
CCFLAGS += -arch $(HOST_ARCH)
else ifeq ($(HOST_ARCH)-$(TARGET_ARCH)-$(TARGET_OS),x86_64-armv7l-linux)
LDFLAGS += --dynamic-linker=/lib/ld-linux-armhf.so.3
CCFLAGS += -mfloat-abi=hard
else ifeq ($(TARGET_OS),android)
LDFLAGS += -pie
CCFLAGS += -fpie -fpic -fexceptions
endif
ifneq ($(TARGET_ARCH),$(HOST_ARCH))
ifeq ($(TARGET_ARCH)-$(TARGET_OS),armv7l-linux)
ifneq ($(TARGET_FS),)
GCCVERSIONLTEQ46 := $(shell expr `$(HOST_COMPILER) -dumpversion` \<= 4.6)
ifeq ($(GCCVERSIONLTEQ46),1)
CCFLAGS += --sysroot=$(TARGET_FS)
endif
LDFLAGS += --sysroot=$(TARGET_FS)
LDFLAGS += -rpath-link=$(TARGET_FS)/lib
LDFLAGS += -rpath-link=$(TARGET_FS)/usr/lib
LDFLAGS += -rpath-link=$(TARGET_FS)/usr/lib/arm-linux-gnueabihf
endif
endif
ifeq ($(TARGET_ARCH)-$(TARGET_OS),aarch64-linux)
ifneq ($(TARGET_FS),)
GCCVERSIONLTEQ46 := $(shell expr `$(HOST_COMPILER) -dumpversion` \<= 4.6)
ifeq ($(GCCVERSIONLTEQ46),1)
CCFLAGS += --sysroot=$(TARGET_FS)
endif
LDFLAGS += --sysroot=$(TARGET_FS)
LDFLAGS += -rpath-link=$(TARGET_FS)/lib -L$(TARGET_FS)/lib
LDFLAGS += -rpath-link=$(TARGET_FS)/lib/aarch64-linux-gnu -L$(TARGET_FS)/lib/aarch64-linux-gnu
LDFLAGS += -rpath-link=$(TARGET_FS)/usr/lib -L$(TARGET_FS)/usr/lib
LDFLAGS += -rpath-link=$(TARGET_FS)/usr/lib/aarch64-linux-gnu -L$(TARGET_FS)/usr/lib/aarch64-linux-gnu
LDFLAGS += --unresolved-symbols=ignore-in-shared-libs
CCFLAGS += -isystem=$(TARGET_FS)/usr/include -I$(TARGET_FS)/usr/include -I$(TARGET_FS)/usr/include/libdrm
CCFLAGS += -isystem=$(TARGET_FS)/usr/include/aarch64-linux-gnu -I$(TARGET_FS)/usr/include/aarch64-linux-gnu
endif
endif
ifeq ($(TARGET_ARCH)-$(TARGET_OS),aarch64-qnx)
NVCCFLAGS += --qpp-config 5.4.0,gcc_ntoaarch64le
CCFLAGS += -DWIN_INTERFACE_CUSTOM -I/usr/include/aarch64-qnx-gnu
LDFLAGS += -lsocket
LDFLAGS += -L/usr/lib/aarch64-qnx-gnu
CCFLAGS += "-Wl\,-rpath-link\,/usr/lib/aarch64-qnx-gnu"
ifdef TARGET_OVERRIDE
LDFLAGS += -lslog2
endif
ifneq ($(TARGET_FS),)
LDFLAGS += -L$(TARGET_FS)/usr/lib
CCFLAGS += "-Wl\,-rpath-link\,$(TARGET_FS)/usr/lib"
LDFLAGS += -L$(TARGET_FS)/usr/libnvidia
CCFLAGS += "-Wl\,-rpath-link\,$(TARGET_FS)/usr/libnvidia"
CCFLAGS += -I$(TARGET_FS)/../include
endif
endif
endif
ifdef TARGET_OVERRIDE # cuda toolkit targets override
NVCCFLAGS += -target-dir $(TARGET_OVERRIDE)
endif
# Install directory of different arch
CUDA_INSTALL_TARGET_DIR :=
ifeq ($(TARGET_ARCH)-$(TARGET_OS),armv7l-linux)
CUDA_INSTALL_TARGET_DIR = targets/armv7-linux-gnueabihf/
else ifeq ($(TARGET_ARCH)-$(TARGET_OS),aarch64-linux)
CUDA_INSTALL_TARGET_DIR = targets/aarch64-linux/
else ifeq ($(TARGET_ARCH)-$(TARGET_OS),sbsa-linux)
CUDA_INSTALL_TARGET_DIR = targets/sbsa-linux/
else ifeq ($(TARGET_ARCH)-$(TARGET_OS),armv7l-android)
CUDA_INSTALL_TARGET_DIR = targets/armv7-linux-androideabi/
else ifeq ($(TARGET_ARCH)-$(TARGET_OS),aarch64-android)
CUDA_INSTALL_TARGET_DIR = targets/aarch64-linux-androideabi/
else ifeq ($(TARGET_ARCH)-$(TARGET_OS),armv7l-qnx)
CUDA_INSTALL_TARGET_DIR = targets/ARMv7-linux-QNX/
else ifeq ($(TARGET_ARCH)-$(TARGET_OS),aarch64-qnx)
CUDA_INSTALL_TARGET_DIR = targets/aarch64-qnx/
else ifeq ($(TARGET_ARCH),ppc64le)
CUDA_INSTALL_TARGET_DIR = targets/ppc64le-linux/
endif
# Debug build flags
ifeq ($(dbg),1)
NVCCFLAGS += -g -G
BUILD_TYPE := debug
else
BUILD_TYPE := release
endif
ALL_CCFLAGS :=
ALL_CCFLAGS += $(NVCCFLAGS)
ALL_CCFLAGS += $(EXTRA_NVCCFLAGS)
ALL_CCFLAGS += $(addprefix -Xcompiler ,$(CCFLAGS))
ALL_CCFLAGS += $(addprefix -Xcompiler ,$(EXTRA_CCFLAGS))
SAMPLE_ENABLED := 1
# This sample is not supported on QNX
ifeq ($(TARGET_OS),qnx)
$(info >>> WARNING - FunctionPointers is not supported on QNX - waiving sample <<<)
SAMPLE_ENABLED := 0
endif
ALL_LDFLAGS :=
ALL_LDFLAGS += $(ALL_CCFLAGS)
ALL_LDFLAGS += $(addprefix -Xlinker ,$(LDFLAGS))
ALL_LDFLAGS += $(addprefix -Xlinker ,$(EXTRA_LDFLAGS))
# Common includes and paths for CUDA
INCLUDES := -I../../Common
LIBRARIES :=
################################################################################
# Makefile include to help find GL Libraries
include ./findgllib.mk
# OpenGL specific libraries
ifeq ($(TARGET_OS),darwin)
# Mac OSX specific libraries and paths to include
LIBRARIES += -L/System/Library/Frameworks/OpenGL.framework/Libraries
LIBRARIES += -lGL -lGLU
ALL_LDFLAGS += -Xlinker -framework -Xlinker GLUT
else
LIBRARIES += $(GLLINK)
LIBRARIES += -lGL -lGLU -lglut
endif
#Detect if installed version of GCC supports required C++11
ifeq ($(TARGET_OS),linux)
empty :=
space := $(empty) $(empty)
GCCVERSIONSTRING := $(shell expr `$(HOST_COMPILER) -dumpversion`)
#Create version number without "."
GCCVERSION := $(shell expr `echo $(GCCVERSIONSTRING)` | cut -f1 -d.)
GCCVERSION += $(shell expr `echo $(GCCVERSIONSTRING)` | cut -f2 -d.)
GCCVERSION += $(shell expr `echo $(GCCVERSIONSTRING)` | cut -f3 -d.)
# Make sure the version number has at least 3 decimals
GCCVERSION += 00
# Remove spaces from the version number
GCCVERSION := $(subst $(space),$(empty),$(GCCVERSION))
#$(warning $(GCCVERSION))
IS_MIN_VERSION := $(shell expr `echo $(GCCVERSION)` \>= 51000)
ifeq ($(IS_MIN_VERSION), 1)
$(info >>> GCC Version is greater or equal to 5.1.0 <<<)
else
$(info >>> Waiving build. Minimum GCC version required is 5.1.0<<<)
SAMPLE_ENABLED := 0
endif
endif
# Gencode arguments
ifeq ($(TARGET_ARCH),$(filter $(TARGET_ARCH),armv7l aarch64))
SMS ?= 35 37 50 52 60 61 70 72 75 80 86
else
SMS ?= 35 37 50 52 60 61 70 75 80 86
endif
ifeq ($(SMS),)
$(info >>> WARNING - no SM architectures have been specified - waiving sample <<<)
SAMPLE_ENABLED := 0
endif
ifeq ($(GENCODE_FLAGS),)
# Generate SASS code for each SM architecture listed in $(SMS)
$(foreach sm,$(SMS),$(eval GENCODE_FLAGS += -gencode arch=compute_$(sm),code=sm_$(sm)))
# Generate PTX code from the highest SM architecture in $(SMS) to guarantee forward-compatibility
HIGHEST_SM := $(lastword $(sort $(SMS)))
ifneq ($(HIGHEST_SM),)
GENCODE_FLAGS += -gencode arch=compute_$(HIGHEST_SM),code=compute_$(HIGHEST_SM)
endif
endif
ALL_CCFLAGS += --threads 0 --std=c++11
ifeq ($(SAMPLE_ENABLED),0)
EXEC ?= @echo "[@]"
endif
################################################################################
# Target rules
all: build
build: FunctionPointers
check.deps:
ifeq ($(SAMPLE_ENABLED),0)
@echo "Sample will be waived due to the above missing dependencies"
else
@echo "Sample is ready - all dependencies have been met"
endif
FunctionPointers.o:FunctionPointers.cpp
$(EXEC) $(NVCC) $(INCLUDES) $(ALL_CCFLAGS) $(GENCODE_FLAGS) -o $@ -c $<
FunctionPointers_kernels.o:FunctionPointers_kernels.cu
$(EXEC) $(NVCC) $(INCLUDES) $(ALL_CCFLAGS) $(GENCODE_FLAGS) -o $@ -c $<
FunctionPointers: FunctionPointers.o FunctionPointers_kernels.o
$(EXEC) $(NVCC) $(ALL_LDFLAGS) $(GENCODE_FLAGS) -o $@ $+ $(LIBRARIES)
$(EXEC) mkdir -p ../../bin/$(TARGET_ARCH)/$(TARGET_OS)/$(BUILD_TYPE)
$(EXEC) cp $@ ../../bin/$(TARGET_ARCH)/$(TARGET_OS)/$(BUILD_TYPE)
run: build
$(EXEC) ./FunctionPointers
clean:
rm -f FunctionPointers FunctionPointers.o FunctionPointers_kernels.o
rm -rf ../../bin/$(TARGET_ARCH)/$(TARGET_OS)/$(BUILD_TYPE)/FunctionPointers
clobber: clean

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<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE entry SYSTEM "SamplesInfo.dtd">
<entry>
<name>FunctionPointers</name>
<description><![CDATA[This sample illustrates how to use function pointers and implements the Sobel Edge Detection filter for 8-bit monochrome images.]]></description>
<devicecompilation>whole</devicecompilation>
<files>
<file>data\lena.pgm</file>
<file>data\ref_orig.pgm</file>
<file>data\ref_tex.pgm</file>
<file>data\ref_shared.pgm</file>
</files>
<includepaths>
<path>./</path>
<path>../</path>
<path>../../Common</path>
</includepaths>
<keyconcepts>
<concept level="advanced">Graphics Interop</concept>
<concept level="advanced">Image Processing</concept>
</keyconcepts>
<keywords>
<keyword>CUDA</keyword>
<keyword>GPGPU</keyword>
<keyword>convolution</keyword>
<keyword>separable convolution</keyword>
<keyword>Image Processing</keyword>
<keyword>filter</keyword>
<keyword>finite impulse-response filter</keyword>
<keyword>openGL</keyword>
</keywords>
<libraries>
<library>GLU</library>
<library>GL</library>
<library framework="true" os="macosx">GLUT</library>
<library os="linux">GLEW</library>
<library os="linux">glut</library>
<library os="linux">X11</library>
</libraries>
<librarypaths>
<path arch="x86_64" os="linux">../../common/lib/linux/x86_64</path>
<path arch="armv7l" os="linux">../../common/lib/linux/armv7l</path>
<path os="macosx">../../common/lib/darwin</path>
</librarypaths>
<nsight_eclipse>true</nsight_eclipse>
<primary_file>FunctionPointers.cpp</primary_file>
<qatests>
<qatest>-mode=0 -file=ref_orig.pgm</qatest>
<qatest>-mode=1 -file=ref_tex.pgm</qatest>
<qatest>-mode=2 -file=ref_shared.pgm</qatest>
</qatests>
<required_dependencies>
<dependency>X11</dependency>
<dependency>GL</dependency>
</required_dependencies>
<scopes>
<scope>1:CUDA Advanced Topics</scope>
<scope>2:Graphics Interop</scope>
<scope>2:Image Processing</scope>
</scopes>
<sm-arch>sm35</sm-arch>
<sm-arch>sm37</sm-arch>
<sm-arch>sm50</sm-arch>
<sm-arch>sm52</sm-arch>
<sm-arch>sm60</sm-arch>
<sm-arch>sm61</sm-arch>
<sm-arch>sm70</sm-arch>
<sm-arch>sm72</sm-arch>
<sm-arch>sm75</sm-arch>
<sm-arch>sm80</sm-arch>
<sm-arch>sm86</sm-arch>
<supported_envs>
<env>
<arch>x86_64</arch>
<platform>linux</platform>
</env>
<env>
<platform>windows7</platform>
</env>
<env>
<arch>x86_64</arch>
<platform>macosx</platform>
</env>
<env>
<arch>arm</arch>
</env>
</supported_envs>
<supported_sm_architectures>
<include>all</include>
</supported_sm_architectures>
<title>Function Pointers</title>
<type>exe</type>
</entry>

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# FunctionPointers - Function Pointers
## Description
This sample illustrates how to use function pointers and implements the Sobel Edge Detection filter for 8-bit monochrome images.
## Key Concepts
Graphics Interop, Image Processing
## Supported SM Architectures
[SM 3.5 ](https://developer.nvidia.com/cuda-gpus) [SM 3.7 ](https://developer.nvidia.com/cuda-gpus) [SM 5.0 ](https://developer.nvidia.com/cuda-gpus) [SM 5.2 ](https://developer.nvidia.com/cuda-gpus) [SM 6.0 ](https://developer.nvidia.com/cuda-gpus) [SM 6.1 ](https://developer.nvidia.com/cuda-gpus) [SM 7.0 ](https://developer.nvidia.com/cuda-gpus) [SM 7.2 ](https://developer.nvidia.com/cuda-gpus) [SM 7.5 ](https://developer.nvidia.com/cuda-gpus) [SM 8.0 ](https://developer.nvidia.com/cuda-gpus) [SM 8.6 ](https://developer.nvidia.com/cuda-gpus)
## Supported OSes
Linux, Windows
## Supported CPU Architecture
x86_64, armv7l
## CUDA APIs involved
## Dependencies needed to build/run
[X11](../../README.md#x11), [GL](../../README.md#gl)
## Prerequisites
Download and install the [CUDA Toolkit 11.5](https://developer.nvidia.com/cuda-downloads) for your corresponding platform.
Make sure the dependencies mentioned in [Dependencies]() section above are installed.
## Build and Run
### Windows
The Windows samples are built using the Visual Studio IDE. Solution files (.sln) are provided for each supported version of Visual Studio, using the format:
```
*_vs<version>.sln - for Visual Studio <version>
```
Each individual sample has its own set of solution files in its directory:
To build/examine all the samples at once, the complete solution files should be used. To build/examine a single sample, the individual sample solution files should be used.
> **Note:** Some samples require that the Microsoft DirectX SDK (June 2010 or newer) be installed and that the VC++ directory paths are properly set up (**Tools > Options...**). Check DirectX Dependencies section for details."
### Linux
The Linux samples are built using makefiles. To use the makefiles, change the current directory to the sample directory you wish to build, and run make:
```
$ cd <sample_dir>
$ make
```
The samples makefiles can take advantage of certain options:
* **TARGET_ARCH=<arch>** - cross-compile targeting a specific architecture. Allowed architectures are x86_64, armv7l.
By default, TARGET_ARCH is set to HOST_ARCH. On a x86_64 machine, not setting TARGET_ARCH is the equivalent of setting TARGET_ARCH=x86_64.<br/>
`$ make TARGET_ARCH=x86_64` <br/> `$ make TARGET_ARCH=armv7l` <br/>
See [here](http://docs.nvidia.com/cuda/cuda-samples/index.html#cross-samples) for more details.
* **dbg=1** - build with debug symbols
```
$ make dbg=1
```
* **SMS="A B ..."** - override the SM architectures for which the sample will be built, where `"A B ..."` is a space-delimited list of SM architectures. For example, to generate SASS for SM 50 and SM 60, use `SMS="50 60"`.
```
$ make SMS="50 60"
```
* **HOST_COMPILER=<host_compiler>** - override the default g++ host compiler. See the [Linux Installation Guide](http://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#system-requirements) for a list of supported host compilers.
```
$ make HOST_COMPILER=g++
```
## References (for more details)

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################################################################################
# Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of NVIDIA CORPORATION nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
# EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
################################################################################
#
# findgllib.mk is used to find the necessary GL Libraries for specific distributions
# this is supported on Mac OSX and Linux Platforms
#
################################################################################
# Determine OS platform and unix distribution
ifeq ("$(TARGET_OS)","linux")
# first search lsb_release
DISTRO := $(shell lsb_release -i -s 2>/dev/null | tr "[:upper:]" "[:lower:]")
ifeq ("$(DISTRO)","")
# second search and parse /etc/issue
DISTRO := $(shell awk '{print $$1}' /etc/issue | tr -d "[:space:]" | sed -e "/^$$/d" | tr "[:upper:]" "[:lower:]")
# ensure data from /etc/issue is valid
ifeq (,$(filter $(DISTRO),ubuntu fedora red rhel centos suse))
DISTRO :=
endif
ifeq ("$(DISTRO)","")
# third, we can search in /etc/os-release or /etc/{distro}-release
DISTRO := $(shell awk '/ID/' /etc/*-release | sed 's/ID=//' | grep -v "VERSION" | grep -v "ID" | grep -v "DISTRIB")
endif
endif
endif
ifeq ("$(TARGET_OS)","linux")
# $(info) >> findgllib.mk -> LINUX path <<<)
# Each set of Linux Distros have different paths for where to find their OpenGL libraries reside
UBUNTU = $(shell echo $(DISTRO) | grep -i ubuntu >/dev/null 2>&1; echo $$?)
FEDORA = $(shell echo $(DISTRO) | grep -i fedora >/dev/null 2>&1; echo $$?)
RHEL = $(shell echo $(DISTRO) | grep -i 'red\|rhel' >/dev/null 2>&1; echo $$?)
CENTOS = $(shell echo $(DISTRO) | grep -i centos >/dev/null 2>&1; echo $$?)
SUSE = $(shell echo $(DISTRO) | grep -i 'suse\|sles' >/dev/null 2>&1; echo $$?)
ifeq ("$(UBUNTU)","0")
ifeq ($(HOST_ARCH)-$(TARGET_ARCH),x86_64-armv7l)
GLPATH := /usr/arm-linux-gnueabihf/lib
GLLINK := -L/usr/arm-linux-gnueabihf/lib
ifneq ($(TARGET_FS),)
GLPATH += $(TARGET_FS)/usr/lib/arm-linux-gnueabihf
GLLINK += -L$(TARGET_FS)/usr/lib/arm-linux-gnueabihf
endif
else ifeq ($(HOST_ARCH)-$(TARGET_ARCH),x86_64-aarch64)
GLPATH := /usr/aarch64-linux-gnu/lib
GLLINK := -L/usr/aarch64-linux-gnu/lib
ifneq ($(TARGET_FS),)
GLPATH += $(TARGET_FS)/usr/lib
GLPATH += $(TARGET_FS)/usr/lib/aarch64-linux-gnu
GLLINK += -L$(TARGET_FS)/usr/lib/aarch64-linux-gnu
endif
else ifeq ($(HOST_ARCH)-$(TARGET_ARCH),x86_64-ppc64le)
GLPATH := /usr/powerpc64le-linux-gnu/lib
GLLINK := -L/usr/powerpc64le-linux-gnu/lib
else
UBUNTU_PKG_NAME = $(shell which dpkg >/dev/null 2>&1 && dpkg -l 'nvidia-*' | grep '^ii' | awk '{print $$2}' | head -1)
ifneq ("$(UBUNTU_PKG_NAME)","")
GLPATH ?= /usr/lib/$(UBUNTU_PKG_NAME)
GLLINK ?= -L/usr/lib/$(UBUNTU_PKG_NAME)
endif
DFLT_PATH ?= /usr/lib
endif
endif
ifeq ("$(SUSE)","0")
GLPATH ?= /usr/X11R6/lib64
GLLINK ?= -L/usr/X11R6/lib64
DFLT_PATH ?= /usr/lib64
endif
ifeq ("$(FEDORA)","0")
GLPATH ?= /usr/lib64/nvidia
GLLINK ?= -L/usr/lib64/nvidia
DFLT_PATH ?= /usr/lib64
endif
ifeq ("$(RHEL)","0")
GLPATH ?= /usr/lib64/nvidia
GLLINK ?= -L/usr/lib64/nvidia
DFLT_PATH ?= /usr/lib64
endif
ifeq ("$(CENTOS)","0")
GLPATH ?= /usr/lib64/nvidia
GLLINK ?= -L/usr/lib64/nvidia
DFLT_PATH ?= /usr/lib64
endif
# find libGL, libGLU
GLLIB := $(shell find -L $(GLPATH) $(DFLT_PATH) -name libGL.so -print 2>/dev/null)
GLULIB := $(shell find -L $(GLPATH) $(DFLT_PATH) -name libGLU.so -print 2>/dev/null)
ifeq ("$(GLLIB)","")
$(info >>> WARNING - libGL.so not found, refer to CUDA Getting Started Guide for how to find and install them. <<<)
SAMPLE_ENABLED := 0
endif
ifeq ("$(GLULIB)","")
$(info >>> WARNING - libGLU.so not found, refer to CUDA Getting Started Guide for how to find and install them. <<<)
SAMPLE_ENABLED := 0
endif
HEADER_SEARCH_PATH ?= $(TARGET_FS)/usr/include
ifeq ($(HOST_ARCH)-$(TARGET_ARCH)-$(TARGET_OS),x86_64-armv7l-linux)
HEADER_SEARCH_PATH += /usr/arm-linux-gnueabihf/include
else ifeq ($(HOST_ARCH)-$(TARGET_ARCH)-$(TARGET_OS),x86_64-aarch64-linux)
HEADER_SEARCH_PATH += /usr/aarch64-linux-gnu/include
endif
GLHEADER := $(shell find -L $(HEADER_SEARCH_PATH) -name gl.h -print 2>/dev/null)
GLUHEADER := $(shell find -L $(HEADER_SEARCH_PATH) -name glu.h -print 2>/dev/null)
ifeq ("$(GLHEADER)","")
$(info >>> WARNING - gl.h not found, refer to CUDA Getting Started Guide for how to find and install them. <<<)
SAMPLE_ENABLED := 0
endif
ifeq ("$(GLUHEADER)","")
$(info >>> WARNING - glu.h not found, refer to CUDA Getting Started Guide for how to find and install them. <<<)
SAMPLE_ENABLED := 0
endif
else
# This would be the Mac OS X path if we had to do anything special
endif