From 7998ff391df798e5c516345cd741a664f058580e Mon Sep 17 00:00:00 2001 From: ItsMAX0112 Date: Sat, 2 Nov 2024 17:04:13 +0530 Subject: [PATCH] some folder structure --- lab4/src/pipes/important.cpp | 283 +++++++++++++++++++++++++++++++++ lab4/src/pipes/important.h | 19 +++ lab4/src/shared.cpp | 254 ----------------------------- lab4/src/shm1.cpp | 53 ------ lab4/src/shm2.cpp | 50 ------ lab4/src/threads/important.cpp | 283 +++++++++++++++++++++++++++++++++ lab4/src/threads/important.h | 19 +++ 7 files changed, 604 insertions(+), 357 deletions(-) create mode 100644 lab4/src/pipes/important.cpp create mode 100644 lab4/src/pipes/important.h delete mode 100644 lab4/src/shared.cpp delete mode 100644 lab4/src/shm1.cpp delete mode 100644 lab4/src/shm2.cpp create mode 100644 lab4/src/threads/important.cpp create mode 100644 lab4/src/threads/important.h diff --git a/lab4/src/pipes/important.cpp b/lab4/src/pipes/important.cpp new file mode 100644 index 0000000..9f72711 --- /dev/null +++ b/lab4/src/pipes/important.cpp @@ -0,0 +1,283 @@ +#include +#include "important.h" +#include +#include +#include + +using namespace std; + +struct image_t *S1_smoothen(struct image_t *input_image) +{ + // cout << input_image->width << input_image->height << " " << input_image->image_pixels << endl; + int width = input_image->width; + int height = input_image->height; + + // memory allocation + struct image_t *smoother = new struct image_t; + smoother->height = height; + smoother->width = width; + smoother->image_pixels = new uint8_t **[height]; + for (int i = 0; i < height; i++) + { + smoother->image_pixels[i] = new uint8_t *[width]; + for (int j = 0; j < width; j++) + smoother->image_pixels[i][j] = new uint8_t[3]; + } + + for (int i = 1; i < height - 1; i++) + { + for (int j = 1; j < width - 1; j++) + { + for (int k = 0; k < 3; k++) + { + // image->image_pixels[i][j][k] = val; + // edge cases + if (i == 0 && j == 0) + { // i-1 and j - 1 doesnt exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i][j][k] / 4 + input_image->image_pixels[i][j + 1][k] / 4 + input_image->image_pixels[i + 1][j][k] / 4 + input_image->image_pixels[i + 1][j + 1][k] / 4); + } + else if (i == height - 1 && j == 0) + { // i+1 and j-1 does not exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j][k] / 4 + input_image->image_pixels[i - 1][j + 1][k] / 4 + input_image->image_pixels[i][j][k] / 4 + input_image->image_pixels[i][j + 1][k] / 4); + } + + else if (i == 0 && j == width - 1) + { // i-1 and j+1 does not exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i][j - 1][k] / 4 + input_image->image_pixels[i][j][k] / 4 + input_image->image_pixels[i + 1][j - 1][k] / 4 + input_image->image_pixels[i + 1][j][k] / 4); + } + else if (i == height - 1 && j == width - 1) + { // i+1 and j+1 does not exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 4 + input_image->image_pixels[i - 1][j][k] / 4 + input_image->image_pixels[i][j - 1][k] / 4 + input_image->image_pixels[i][j][k] / 4); + } + else if (i == 0) + { // i - 1 does not exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i][j - 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i][j + 1][k] / 6 + input_image->image_pixels[i + 1][j - 1][k] / 6 + input_image->image_pixels[i + 1][j][k] / 6 + input_image->image_pixels[i + 1][j + 1][k] / 6); + } + + else if (j == 0) + { // j -1 does not exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j][k] / 6 + input_image->image_pixels[i - 1][j + 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i][j + 1][k] / 6 + input_image->image_pixels[i + 1][j][k] / 6 + input_image->image_pixels[i + 1][j + 1][k] / 6); + } + + else if (i == height - 1) + { // i+1 does not exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 6 + input_image->image_pixels[i - 1][j][k] / 6 + input_image->image_pixels[i - 1][j + 1][k] / 6 + input_image->image_pixels[i][j - 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i][j + 1][k] / 6); + } + else if (j == width - 1) + { // j + 1 does not exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 6 + input_image->image_pixels[i - 1][j][k] / 6 + input_image->image_pixels[i][j - 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i + 1][j - 1][k] / 6 + input_image->image_pixels[i + 1][j][k] / 6); + } + else + { + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 9 + input_image->image_pixels[i - 1][j][k] / 9 + input_image->image_pixels[i - 1][j + 1][k] / 9 + input_image->image_pixels[i][j - 1][k] / 9 + input_image->image_pixels[i][j][k] / 9 + input_image->image_pixels[i][j + 1][k] / 9 + input_image->image_pixels[i + 1][j - 1][k] / 9 + input_image->image_pixels[i + 1][j][k] / 9 + input_image->image_pixels[i + 1][j + 1][k] / 9); + } + } + } + } + + return smoother; +} + +struct image_t *S2_find_details(struct image_t *input_image, struct image_t *smoothened_image) +{ + // TODO + int width = input_image->width; + int height = input_image->height; + + struct image_t *details = new struct image_t; + details->height = height; + details->width = width; + details->image_pixels = new uint8_t **[height]; + + for (int i = 0; i < height; i++) + { + details->image_pixels[i] = new uint8_t *[width]; + for (int j = 0; j < width; j++) + details->image_pixels[i][j] = new uint8_t[3]; + } + + for (int i = 1; i < height - 1; i++) + { + for (int j = 1; j < width - 1; j++) + { + for (int k = 0; k < 3; k++) + { + details->image_pixels[i][j][k] = max(0, input_image->image_pixels[i][j][k] - smoothened_image->image_pixels[i][j][k]); + } + } + } + + return details; +} + +struct image_t *S3_sharpen(struct image_t *input_image, struct image_t *details_image) +{ + // TODO + int width = input_image->width; + int height = input_image->height; + + int a = 1; + + struct image_t *sharp = new struct image_t; + sharp->height = height; + sharp->width = width; + sharp->image_pixels = new uint8_t **[height]; + + for (int i = 0; i < height; i++) + { + sharp->image_pixels[i] = new uint8_t *[width]; + for (int j = 0; j < width; j++) + sharp->image_pixels[i][j] = new uint8_t[3]; + } + + for (int i = 1; i < height - 1; i++) + { + for (int j = 1; j < width - 1; j++) + { + for (int k = 0; k < 3; k++) + { + sharp->image_pixels[i][j][k] = min(255, input_image->image_pixels[i][j][k] + details_image->image_pixels[i][j][k]) * a; + } + } + } + return sharp; // TODO remove this line when adding your code +} + +uint8_t skip_blanks_comments_while_reading(ifstream *read_stream) // returns the byte at the first position after the skipping of the blank space +{ + uint8_t val; + while (true) + { + val = read_stream->get(); + if (val == '#') + { + while (val != '\n') + { + val = read_stream->get(); + } + } + if (val == '\n' || val == ' ' || val == '\t') + { + continue; + } + else if (val != '#') + return val; + } + return val; +} + +struct image_t *read_ppm_file(char *path_to_input_file) +{ + // cout << "input image file = " << path_to_input_file << "\n"; + + ifstream read_stream(path_to_input_file, ios::binary | ios::in); + + if (read_stream.is_open()) + { + struct image_t *image = new struct image_t; + + uint8_t val = skip_blanks_comments_while_reading(&read_stream); // 'P' + val = read_stream.get(); //'6' + + // width + val = skip_blanks_comments_while_reading(&read_stream); + while (true) + { + if (val == ' ' || val == '\t' || val == '\n') + break; + image->width = image->width * 10 + (val - '0'); + val = read_stream.get(); + } + // cout << "width = " << image->width << "\n"; + + // height + val = skip_blanks_comments_while_reading(&read_stream); + while (true) + { + if (val == ' ' || val == '\t' || val == '\n') + break; + image->height = image->height * 10 + (val - '0'); + val = read_stream.get(); + } + // cout << "height = " << image->height << "\n"; + + image->image_pixels = new uint8_t **[image->height]; + for (int i = 0; i < image->height; i++) + { + image->image_pixels[i] = new uint8_t *[image->width]; + for (int j = 0; j < image->width; j++) + image->image_pixels[i][j] = new uint8_t[3]; + } + + // maxval + val = skip_blanks_comments_while_reading(&read_stream); + while (true) + { + if (val == ' ' || val == '\t' || val == '\n') + break; + val = read_stream.get(); + } + + // get pixel values + val = skip_blanks_comments_while_reading(&read_stream); + for (int i = 0; i < image->height; i++) + { + for (int j = 0; j < image->width; j++) + { + for (int k = 0; k < 3; k++) + { + image->image_pixels[i][j][k] = val; + val = read_stream.get(); // assuming maxval of <=255 + } + } + } + // read_stream.seekg(-1, ios_base::cur); + // read_stream.read(((char*)image->image_pixels), image->height * image->width * 3); //assuming maxval of <=255 + + read_stream.close(); + + return image; + } + else + { + cerr << "failed to open file " << path_to_input_file << "\n\n"; + exit(1); + } +} + +void write_ppm_file(char *path_to_output_file, struct image_t *image) +{ + // cout << "output image file = " << path_to_output_file << "\n"; + + ofstream write_stream(path_to_output_file, ios::binary | ios::out); + + if (write_stream.is_open()) + { + write_stream.write("P6\n", 3); + std::string width_string = std::to_string(image->width); + // cout << "width = " << width_string << "\n"; + write_stream.write(width_string.c_str(), width_string.length()); + write_stream.write(" ", 1); + std::string height_string = std::to_string(image->height); + // cout << "height = " << height_string << "\n"; + write_stream.write(height_string.c_str(), height_string.length()); + write_stream.write("\n255\n", 5); + for (int i = 0; i < image->height; i++) + { + for (int j = 0; j < image->width; j++) + { + for (int k = 0; k < 3; k++) + { + write_stream.put(image->image_pixels[i][j][k]); // assuming maxval of <=255 + } + } + } + // write_stream.write(((char*)image->image_pixels), image->height * image->width * 3); + write_stream.close(); + } + else + { + cerr << "failed to open file " << path_to_output_file << "\n\n"; + exit(1); + } +} diff --git a/lab4/src/pipes/important.h b/lab4/src/pipes/important.h new file mode 100644 index 0000000..b536603 --- /dev/null +++ b/lab4/src/pipes/important.h @@ -0,0 +1,19 @@ +#ifndef IMPORTANT_H +#define IMPORTANT_H +#include + +struct image_t +{ + int width; + int height; + uint8_t*** image_pixels; +}; + +struct image_t* S1_smoothen(struct image_t *input_image); +struct image_t* S2_find_details(struct image_t *input_image, struct image_t *smoothened_image); +struct image_t* S3_sharpen(struct image_t *input_image, struct image_t *details_image); + +struct image_t* read_ppm_file(char* path_to_input_file); +void write_ppm_file(char* path_to_output_file, struct image_t* image); + +#endif \ No newline at end of file diff --git a/lab4/src/shared.cpp b/lab4/src/shared.cpp deleted file mode 100644 index 5cfbb68..0000000 --- a/lab4/src/shared.cpp +++ /dev/null @@ -1,254 +0,0 @@ -#include "important.h" -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -using namespace std; - -int main(int argc, char *argv[]) { - - // if(argc != 3) - // { - // cout << "usage: ./a.out \n\n"; - // exit(0); - // } - - // struct image_t *input_image = read_ppm_file(argv[1]); - - const char *shm1_name = "/shm_parent_child"; - const char *shm2_name = "/shm_child_grandchild"; - const char *sem1_name = "/sem_parent_child"; - const char *sem2_name = "/sem_child_grandchild"; - - int shm_fd = shm_open(shm1_name, O_CREAT | O_RDWR, 0666); - if (shm_fd == -1) { - perror("shm_open"); - return 1; - } - - // Resize the shared memory object to the desired size - if (ftruncate(shm_fd, size) == -1) { - perror("ftruncate"); - return 1; - } - - // Map the shared memory object into the process address space - void *ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, shm_fd, 0); - if (ptr == MAP_FAILED) { - perror("mmap"); - return 1; - } - - sem_t *sem_parent_child = sem_open(sem1_name, O_CREAT, 0666, 0); // Initially locked (0) - sem_t *sem_child_grandchild = sem_open(sem2_name, O_CREAT, 0666, 0); // Initially locked (0) - - if (sem_parent_child == SEM_FAILED || sem_child_grandchild == SEM_FAILED) { - perror("sem_open failed"); - exit(EXIT_FAILURE); - } - - - // size_t size = input_image->height * input_image->width * 3 * sizeof(uint8_t); - size_t size = 1024; - - pid_t CHILD; - CHILD = fork(); - if (CHILD == -1) { - perror("fork failed!"); - exit(EXIT_FAILURE); - } - - // Parent Process - if(CHILD != 0){ - - char buffer[1024] = {'p', 'a', 'c', 'k', 'e', 't', '\0'}; - buffer[7] = '\0'; - - // Write data to the shared memory - for(int i = 1; i < 5; i++){ - // printf("parent writing to shm\n"); - buffer[6] = '0' + i; - memcpy(ptr, buffer, 1024); // Copy 1024 bytes to shared memory - - // Optional: Print what is being written to shared memory for verification - printf("P - Writing to shared memory: %s\n", (char *)ptr); - sem_post(sem_parent_child); - sem_wait(sem_child_grandchild); - } - - // Unmap the shared memory object - if (munmap(ptr, size) == -1) { - perror("munmap"); - return 1; - } - - // Close the shared memory file descriptor - if (close(shm_fd) == -1) { - perror("close"); - return 1; - } - - sem_close(sem_parent_child); - sem_close(sem_child_grandchild); - wait(NULL); /* Wait for child */ - } - - // Child process - else if (CHILD == 0) { /* Child reads from pipe */ - pid_t GRAND_CHILD = fork(); - - if (GRAND_CHILD == -1) { - perror("fork failed!"); - exit(EXIT_FAILURE); - } - - // Child Process - if(GRAND_CHILD != 0){ - int shm_fd = shm_open(shm1_name, O_CREAT | O_RDWR, 0666); - if (shm_fd == -1) { - perror("shm_open"); - return 1; - } - - // Resize the shared memory object to the desired size - if (ftruncate(shm_fd, size) == -1) { - perror("ftruncate"); - return 1; - } - - // Map the shared memory object into the process address space - void *ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, shm_fd, 0); - if (ptr == MAP_FAILED) { - perror("mmap"); - return 1; - } - - int shm2_fd = shm_open(shm2_name, O_CREAT | O_RDWR, 0666); - if (shm2_fd == -1) { - perror("shm_open"); - return 1; - } - - // Resize the shared memory object to the desired size - if (ftruncate(shm2_fd, size) == -1) { - perror("ftruncate"); - return 1; - } - - // Map the shared memory object into the process address space - void *ptr2 = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, shm2_fd, 0); - if (ptr2 == MAP_FAILED) { - perror("mmap"); - return 1; - } - - for(int i=0; i<5; i++){ - // printf("Child reading from shm1 and writing to shm2...\n"); - sem_wait(sem_parent_child); - // Print the contents of the shared memory - char *packet = (char *)ptr; - printf("C - Shared memory contents: %s\n", packet); - // char buffer[1024]; - // strncpy(buffer, (char *)ptr, 1024); - memcpy(ptr2, ptr, 1024); - sem_post(sem_child_grandchild); // Signal parent - } - - // Unmap the shared memory object - if (munmap(ptr, size) == -1) { - perror("munmap"); - return 1; - } - - // Close the shared memory file descriptor - if (close(shm_fd) == -1) { - perror("close"); - return 1; - } - // printf("child writing to shm\n"); - - // Unmap the shared memory object - if (munmap(ptr2, size) == -1) { - perror("munmap"); - return 1; - } - - // Close the shared memory file descriptor - if (close(shm2_fd) == -1) { - perror("close"); - return 1; - } - - shm_unlink(shm1_name); - sem_close(sem_parent_child); - sem_close(sem_child_grandchild); - wait(NULL); - exit(EXIT_SUCCESS); - } - - // GrandChild Process - else if (GRAND_CHILD == 0) { /* GrandChild reads from pipe */ - int shm2_fd = shm_open(shm2_name, O_CREAT | O_RDWR, 0666); - if (shm2_fd == -1) { - perror("shm_open"); - return 1; - } - - // Resize the shared memory object to the desired size - if (ftruncate(shm2_fd, size) == -1) { - perror("ftruncate"); - return 1; - } - - // Map the shared memory object into the process address space - void *ptr2 = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, shm2_fd, 0); - if (ptr2 == MAP_FAILED) { - perror("mmap"); - return 1; - } - - for(int i=0; i<5; i++){ - sem_wait(sem_child_grandchild); - // Print the contents of the shared memory - // printf("Grandchild reading from shm...\n"); - printf("GC - Shared memory contents: %s\n", (char *)ptr2); - } - - // Unmap the shared memory object - if (munmap(ptr2, size) == -1) { - perror("munmap"); - return 1; - } - - // Close the shared memory file descriptor - if (close(shm2_fd) == -1) { - perror("close"); - return 1; - } - - shm_unlink(shm2_name); - sem_close(sem_parent_child); - sem_close(sem_child_grandchild); - exit(EXIT_SUCCESS); - } - } - - sem_close(sem_parent_child); - sem_close(sem_child_grandchild); - sem_unlink(sem1_name); - sem_unlink(sem2_name); - - cout << "success" << endl; - return 0; -} \ No newline at end of file diff --git a/lab4/src/shm1.cpp b/lab4/src/shm1.cpp deleted file mode 100644 index 977185a..0000000 --- a/lab4/src/shm1.cpp +++ /dev/null @@ -1,53 +0,0 @@ -#include -#include -#include -#include -#include - -int main() { - const char *name = "/my_shared_memory"; - int shm_fd = shm_open(name, O_CREAT | O_RDWR, 0666); - if (shm_fd == -1) { - perror("shm_open"); - return 1; - } - - // Set the size of the shared memory region - size_t size = 1024; - - // Resize the shared memory object to the desired size - if (ftruncate(shm_fd, size) == -1) { - perror("ftruncate"); - return 1; - } - - // Map the shared memory object into the process address space - void *ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, shm_fd, 0); - if (ptr == MAP_FAILED) { - perror("mmap"); - return 1; - } - - // Write data to the shared memory - sprintf((char *)ptr, "Hello, shared memory!"); - - // Unmap the shared memory object - if (munmap(ptr, size) == -1) { - perror("munmap"); - return 1; - } - - // Close the shared memory file descriptor - if (close(shm_fd) == -1) { - perror("close"); - return 1; - } - - // Unlink the shared memory object - if (shm_unlink(name) == -1) { - perror("shm_unlink"); - return 1; - } - - return 0; -} diff --git a/lab4/src/shm2.cpp b/lab4/src/shm2.cpp deleted file mode 100644 index aec2d26..0000000 --- a/lab4/src/shm2.cpp +++ /dev/null @@ -1,50 +0,0 @@ -/* reader */ -#include -#include -#include -#include -#include - -int main() { - const char *name = "/my_shared_memory"; - int shm_fd = shm_open(name, O_CREAT | O_RDWR, 0666); - if (shm_fd == -1) { - perror("shm_open"); - return 1; - } - - // Set the size of the shared memory region - size_t size = 1024; - - // Resize the shared memory object to the desired size - if (ftruncate(shm_fd, size) == -1) { - perror("ftruncate"); - return 1; - } - - // Map the shared memory object into the process address space - void *ptr = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, shm_fd, 0); - if (ptr == MAP_FAILED) { - perror("mmap"); - return 1; - } - - sleep(2); - - // Print the contents of the shared memory - printf("Shared memory contents: %s\n", (char *)ptr); - - // Unmap the shared memory object - if (munmap(ptr, size) == -1) { - perror("munmap"); - return 1; - } - - // Close the shared memory file descriptor - if (close(shm_fd) == -1) { - perror("close"); - return 1; - } - - return 0; -} diff --git a/lab4/src/threads/important.cpp b/lab4/src/threads/important.cpp new file mode 100644 index 0000000..9f72711 --- /dev/null +++ b/lab4/src/threads/important.cpp @@ -0,0 +1,283 @@ +#include +#include "important.h" +#include +#include +#include + +using namespace std; + +struct image_t *S1_smoothen(struct image_t *input_image) +{ + // cout << input_image->width << input_image->height << " " << input_image->image_pixels << endl; + int width = input_image->width; + int height = input_image->height; + + // memory allocation + struct image_t *smoother = new struct image_t; + smoother->height = height; + smoother->width = width; + smoother->image_pixels = new uint8_t **[height]; + for (int i = 0; i < height; i++) + { + smoother->image_pixels[i] = new uint8_t *[width]; + for (int j = 0; j < width; j++) + smoother->image_pixels[i][j] = new uint8_t[3]; + } + + for (int i = 1; i < height - 1; i++) + { + for (int j = 1; j < width - 1; j++) + { + for (int k = 0; k < 3; k++) + { + // image->image_pixels[i][j][k] = val; + // edge cases + if (i == 0 && j == 0) + { // i-1 and j - 1 doesnt exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i][j][k] / 4 + input_image->image_pixels[i][j + 1][k] / 4 + input_image->image_pixels[i + 1][j][k] / 4 + input_image->image_pixels[i + 1][j + 1][k] / 4); + } + else if (i == height - 1 && j == 0) + { // i+1 and j-1 does not exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j][k] / 4 + input_image->image_pixels[i - 1][j + 1][k] / 4 + input_image->image_pixels[i][j][k] / 4 + input_image->image_pixels[i][j + 1][k] / 4); + } + + else if (i == 0 && j == width - 1) + { // i-1 and j+1 does not exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i][j - 1][k] / 4 + input_image->image_pixels[i][j][k] / 4 + input_image->image_pixels[i + 1][j - 1][k] / 4 + input_image->image_pixels[i + 1][j][k] / 4); + } + else if (i == height - 1 && j == width - 1) + { // i+1 and j+1 does not exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 4 + input_image->image_pixels[i - 1][j][k] / 4 + input_image->image_pixels[i][j - 1][k] / 4 + input_image->image_pixels[i][j][k] / 4); + } + else if (i == 0) + { // i - 1 does not exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i][j - 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i][j + 1][k] / 6 + input_image->image_pixels[i + 1][j - 1][k] / 6 + input_image->image_pixels[i + 1][j][k] / 6 + input_image->image_pixels[i + 1][j + 1][k] / 6); + } + + else if (j == 0) + { // j -1 does not exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j][k] / 6 + input_image->image_pixels[i - 1][j + 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i][j + 1][k] / 6 + input_image->image_pixels[i + 1][j][k] / 6 + input_image->image_pixels[i + 1][j + 1][k] / 6); + } + + else if (i == height - 1) + { // i+1 does not exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 6 + input_image->image_pixels[i - 1][j][k] / 6 + input_image->image_pixels[i - 1][j + 1][k] / 6 + input_image->image_pixels[i][j - 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i][j + 1][k] / 6); + } + else if (j == width - 1) + { // j + 1 does not exist + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 6 + input_image->image_pixels[i - 1][j][k] / 6 + input_image->image_pixels[i][j - 1][k] / 6 + input_image->image_pixels[i][j][k] / 6 + input_image->image_pixels[i + 1][j - 1][k] / 6 + input_image->image_pixels[i + 1][j][k] / 6); + } + else + { + smoother->image_pixels[i][j][k] = (input_image->image_pixels[i - 1][j - 1][k] / 9 + input_image->image_pixels[i - 1][j][k] / 9 + input_image->image_pixels[i - 1][j + 1][k] / 9 + input_image->image_pixels[i][j - 1][k] / 9 + input_image->image_pixels[i][j][k] / 9 + input_image->image_pixels[i][j + 1][k] / 9 + input_image->image_pixels[i + 1][j - 1][k] / 9 + input_image->image_pixels[i + 1][j][k] / 9 + input_image->image_pixels[i + 1][j + 1][k] / 9); + } + } + } + } + + return smoother; +} + +struct image_t *S2_find_details(struct image_t *input_image, struct image_t *smoothened_image) +{ + // TODO + int width = input_image->width; + int height = input_image->height; + + struct image_t *details = new struct image_t; + details->height = height; + details->width = width; + details->image_pixels = new uint8_t **[height]; + + for (int i = 0; i < height; i++) + { + details->image_pixels[i] = new uint8_t *[width]; + for (int j = 0; j < width; j++) + details->image_pixels[i][j] = new uint8_t[3]; + } + + for (int i = 1; i < height - 1; i++) + { + for (int j = 1; j < width - 1; j++) + { + for (int k = 0; k < 3; k++) + { + details->image_pixels[i][j][k] = max(0, input_image->image_pixels[i][j][k] - smoothened_image->image_pixels[i][j][k]); + } + } + } + + return details; +} + +struct image_t *S3_sharpen(struct image_t *input_image, struct image_t *details_image) +{ + // TODO + int width = input_image->width; + int height = input_image->height; + + int a = 1; + + struct image_t *sharp = new struct image_t; + sharp->height = height; + sharp->width = width; + sharp->image_pixels = new uint8_t **[height]; + + for (int i = 0; i < height; i++) + { + sharp->image_pixels[i] = new uint8_t *[width]; + for (int j = 0; j < width; j++) + sharp->image_pixels[i][j] = new uint8_t[3]; + } + + for (int i = 1; i < height - 1; i++) + { + for (int j = 1; j < width - 1; j++) + { + for (int k = 0; k < 3; k++) + { + sharp->image_pixels[i][j][k] = min(255, input_image->image_pixels[i][j][k] + details_image->image_pixels[i][j][k]) * a; + } + } + } + return sharp; // TODO remove this line when adding your code +} + +uint8_t skip_blanks_comments_while_reading(ifstream *read_stream) // returns the byte at the first position after the skipping of the blank space +{ + uint8_t val; + while (true) + { + val = read_stream->get(); + if (val == '#') + { + while (val != '\n') + { + val = read_stream->get(); + } + } + if (val == '\n' || val == ' ' || val == '\t') + { + continue; + } + else if (val != '#') + return val; + } + return val; +} + +struct image_t *read_ppm_file(char *path_to_input_file) +{ + // cout << "input image file = " << path_to_input_file << "\n"; + + ifstream read_stream(path_to_input_file, ios::binary | ios::in); + + if (read_stream.is_open()) + { + struct image_t *image = new struct image_t; + + uint8_t val = skip_blanks_comments_while_reading(&read_stream); // 'P' + val = read_stream.get(); //'6' + + // width + val = skip_blanks_comments_while_reading(&read_stream); + while (true) + { + if (val == ' ' || val == '\t' || val == '\n') + break; + image->width = image->width * 10 + (val - '0'); + val = read_stream.get(); + } + // cout << "width = " << image->width << "\n"; + + // height + val = skip_blanks_comments_while_reading(&read_stream); + while (true) + { + if (val == ' ' || val == '\t' || val == '\n') + break; + image->height = image->height * 10 + (val - '0'); + val = read_stream.get(); + } + // cout << "height = " << image->height << "\n"; + + image->image_pixels = new uint8_t **[image->height]; + for (int i = 0; i < image->height; i++) + { + image->image_pixels[i] = new uint8_t *[image->width]; + for (int j = 0; j < image->width; j++) + image->image_pixels[i][j] = new uint8_t[3]; + } + + // maxval + val = skip_blanks_comments_while_reading(&read_stream); + while (true) + { + if (val == ' ' || val == '\t' || val == '\n') + break; + val = read_stream.get(); + } + + // get pixel values + val = skip_blanks_comments_while_reading(&read_stream); + for (int i = 0; i < image->height; i++) + { + for (int j = 0; j < image->width; j++) + { + for (int k = 0; k < 3; k++) + { + image->image_pixels[i][j][k] = val; + val = read_stream.get(); // assuming maxval of <=255 + } + } + } + // read_stream.seekg(-1, ios_base::cur); + // read_stream.read(((char*)image->image_pixels), image->height * image->width * 3); //assuming maxval of <=255 + + read_stream.close(); + + return image; + } + else + { + cerr << "failed to open file " << path_to_input_file << "\n\n"; + exit(1); + } +} + +void write_ppm_file(char *path_to_output_file, struct image_t *image) +{ + // cout << "output image file = " << path_to_output_file << "\n"; + + ofstream write_stream(path_to_output_file, ios::binary | ios::out); + + if (write_stream.is_open()) + { + write_stream.write("P6\n", 3); + std::string width_string = std::to_string(image->width); + // cout << "width = " << width_string << "\n"; + write_stream.write(width_string.c_str(), width_string.length()); + write_stream.write(" ", 1); + std::string height_string = std::to_string(image->height); + // cout << "height = " << height_string << "\n"; + write_stream.write(height_string.c_str(), height_string.length()); + write_stream.write("\n255\n", 5); + for (int i = 0; i < image->height; i++) + { + for (int j = 0; j < image->width; j++) + { + for (int k = 0; k < 3; k++) + { + write_stream.put(image->image_pixels[i][j][k]); // assuming maxval of <=255 + } + } + } + // write_stream.write(((char*)image->image_pixels), image->height * image->width * 3); + write_stream.close(); + } + else + { + cerr << "failed to open file " << path_to_output_file << "\n\n"; + exit(1); + } +} diff --git a/lab4/src/threads/important.h b/lab4/src/threads/important.h new file mode 100644 index 0000000..b536603 --- /dev/null +++ b/lab4/src/threads/important.h @@ -0,0 +1,19 @@ +#ifndef IMPORTANT_H +#define IMPORTANT_H +#include + +struct image_t +{ + int width; + int height; + uint8_t*** image_pixels; +}; + +struct image_t* S1_smoothen(struct image_t *input_image); +struct image_t* S2_find_details(struct image_t *input_image, struct image_t *smoothened_image); +struct image_t* S3_sharpen(struct image_t *input_image, struct image_t *details_image); + +struct image_t* read_ppm_file(char* path_to_input_file); +void write_ppm_file(char* path_to_output_file, struct image_t* image); + +#endif \ No newline at end of file