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Merge branch 'main' of https://github.com/kuhyx/testsAndMisc

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Krzysztof Rudnicki 2024-11-14 20:53:05 +01:00
commit 56187cc96c
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31
C/misc/randomJPG/Makefile Normal file
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# Compiler
CC = gcc
# Compiler flags
CFLAGS = -Wall -O3 -march=native -flto -fomit-frame-pointer
# Libraries
LIBS = -ljpeg
# Source files
SRCS = generate_jpg.c
# Output executable
TARGET = generate_images
# Default target
all: $(TARGET)
# Link and compile the program
$(TARGET): $(SRCS)
$(CC) $(CFLAGS) -o $(TARGET) $(SRCS) $(LIBS)
# Clean up build artifacts
clean:
rm -f $(TARGET)
# Install the program (optional)
install: $(TARGET)
install -m 755 $(TARGET) /usr/local/bin/
.PHONY: all clean install

238
C/misc/randomJPG/generate_jpg.c Normal file
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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <jpeglib.h>
#include <sys/stat.h>
#include <errno.h>
typedef struct {
unsigned char r, g, b;
} RGB;
void print_usage(const char* program_name) {
printf("Usage: %s [options] <num_images> <size> <block_size> <quality> <output_path> <color1> ... <colorN>\n", program_name);
printf("Options:\n");
printf(" -h, --help Show this help message and exit\n");
printf("Arguments:\n");
printf(" <num_images> Number of images to generate (default: 1)\n");
printf(" <size> Size of each image (default: 1000)\n");
printf(" <block_size> Size of each block (default: 25)\n");
printf(" <quality> Quality of the output image (default: 100)\n");
printf(" <output_path> Path to save the output image (default: output.png)\n");
printf(" <color1> ... <colorN> List of colors in hex format (default: #000000 and #FFFFFF)\n");
}
void create_folder_if_not_exists(const char* folder) {
struct stat st = {0};
if (stat(folder, &st) == -1) {
if (mkdir(folder, 0700) != 0) {
fprintf(stderr, "Error creating directory: %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
}
}
void generate_image_filename(char* unique_output_path, size_t size, const char* folder, int image_index) {
snprintf(unique_output_path, size, "%s/bloated_image_%d.jpg", folder, image_index);
}
unsigned char* allocate_image_buffer(int size) {
unsigned char *image_buffer = malloc(size * size * 3);
if (!image_buffer) {
fprintf(stderr, "Error allocating memory\n");
exit(EXIT_FAILURE);
}
return image_buffer;
}
void fill_image_with_colors(unsigned char* image_buffer, int size, RGB* color_list, int num_colors, int block_size) {
for (int y = 0; y < size; y += block_size) {
for (int x = 0; x < size; x += block_size) {
RGB color = color_list[rand() % num_colors];
for (int i = 0; i < block_size; ++i) {
for (int j = 0; j < block_size; ++j) {
int index = ((y + i) * size + (x + j)) * 3;
image_buffer[index] = color.r;
image_buffer[index + 1] = color.g;
image_buffer[index + 2] = color.b;
}
}
}
}
}
void handle_error(FILE *outfile, unsigned char *image_buffer) {
if (!outfile) {
fprintf(stderr, "Error opening output file: %s\n", strerror(errno));
free(image_buffer);
exit(EXIT_FAILURE);
}
}
void setup_compression(struct jpeg_compress_struct *cinfo, struct jpeg_error_mgr *jerr, FILE *outfile, int size, int quality) {
cinfo->err = jpeg_std_error(jerr);
jpeg_create_compress(cinfo);
jpeg_stdio_dest(cinfo, outfile);
cinfo->image_width = size;
cinfo->image_height = size;
cinfo->input_components = 3;
cinfo->in_color_space = JCS_RGB;
jpeg_set_defaults(cinfo);
jpeg_set_quality(cinfo, quality, TRUE);
jpeg_start_compress(cinfo, TRUE);
}
void write_scanlines(struct jpeg_compress_struct *cinfo, unsigned char *image_buffer, int size) {
JSAMPROW row_pointer;
while (cinfo->next_scanline < cinfo->image_height) {
row_pointer = (JSAMPROW) &image_buffer[cinfo->next_scanline * size * 3];
jpeg_write_scanlines(cinfo, &row_pointer, 1);
}
}
void finalize_compression(struct jpeg_compress_struct *cinfo, FILE *outfile) {
jpeg_finish_compress(cinfo);
fclose(outfile);
jpeg_destroy_compress(cinfo);
}
void save_image_as_jpeg(unsigned char* image_buffer, int size, const char* unique_output_path, int quality) {
struct jpeg_compress_struct cinfo;
struct jpeg_error_mgr jerr;
FILE *outfile = fopen(unique_output_path, "wb");
handle_error(outfile, image_buffer);
setup_compression(&cinfo, &jerr, outfile, size, quality);
write_scanlines(&cinfo, image_buffer, size);
finalize_compression(&cinfo, outfile);
free(image_buffer);
}
void generate_bloated_jpeg(int size, RGB* color_list, int num_colors, int block_size, const char* output_path, int quality, int image_index, const char* folder) {
if (size % block_size != 0) {
fprintf(stderr, "Size must be divisible by block_size\n");
exit(EXIT_FAILURE);
}
create_folder_if_not_exists(folder);
char unique_output_path[1024];
generate_image_filename(unique_output_path, sizeof(unique_output_path), folder, image_index);
unsigned char* image_buffer = allocate_image_buffer(size);
fill_image_with_colors(image_buffer, size, color_list, num_colors, block_size);
save_image_as_jpeg(image_buffer, size, unique_output_path, quality);
printf("Image %d saved to %s\n", image_index, unique_output_path);
}
void allocate_color_list(int num_colors, RGB** color_list) {
*color_list = malloc(num_colors * sizeof(RGB));
if (!(*color_list)) {
fprintf(stderr, "Error allocating memory\n");
exit(EXIT_FAILURE);
}
}
void parse_single_color(const char* color_str, RGB* color) {
unsigned int r, g, b;
if (sscanf(color_str, "#%02x%02x%02x", &r, &g, &b) != 3) {
fprintf(stderr, "Invalid color format: %s\n", color_str);
exit(EXIT_FAILURE);
}
*color = (RGB){ r, g, b };
}
void parse_color_list(int argc, char* argv[], int* num_colors, RGB** color_list) {
*num_colors = argc - 6;
allocate_color_list(*num_colors, color_list);
for (int i = 0; i < *num_colors; ++i) {
parse_single_color(argv[6 + i], &(*color_list)[i]);
}
}
void parse_default_colors(int* num_colors, RGB** color_list) {
const char* default_colors[] = { "#000000", "#FFFFFF" };
*num_colors = sizeof(default_colors) / sizeof(default_colors[0]);
allocate_color_list(*num_colors, color_list);
for (int i = 0; i < *num_colors; ++i) {
parse_single_color(default_colors[i], &(*color_list)[i]);
}
}
void parse_colors(int argc, char* argv[], int* num_colors, RGB** color_list) {
if (argc > 6) {
parse_color_list(argc, argv, num_colors, color_list);
} else {
parse_default_colors(num_colors, color_list);
}
}
void parse_arguments(int argc, char* argv[], int* num_images, int* size, int* block_size, int* quality, const char** output_path) {
// Default values
*num_images = 1;
*size = 1000;
*block_size = 25;
*quality = 100;
*output_path = "output.png";
if (argc > 1) *num_images = atoi(argv[1]);
if (argc > 2) *size = atoi(argv[2]);
if (argc > 3) *block_size = atoi(argv[3]);
if (argc > 4) *quality = atoi(argv[4]);
if (argc > 5) *output_path = argv[5];
}
void create_output_folder(char *folder, size_t folder_size) {
time_t now = time(NULL);
struct tm *t = localtime(&now);
strftime(folder, folder_size, "generated_images_%Y%m%d_%H%M%S", t);
}
int handle_help_option(int argc, char *argv[]) {
if (argc > 1 && (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-h") == 0)) {
print_usage(argv[0]);
return 1;
}
return 0;
}
int main(int argc, char *argv[]) {
srand(time(NULL));
if (handle_help_option(argc, argv)) {
return EXIT_SUCCESS;
}
// Start time measurement
clock_t start_time = clock();
int num_images, size, block_size, quality;
const char *output_path;
parse_arguments(argc, argv, &num_images, &size, &block_size, &quality, &output_path);
RGB *color_list;
int num_colors;
parse_colors(argc, argv, &num_colors, &color_list);
char folder[64];
create_output_folder(folder, sizeof(folder));
for (int i = 1; i <= num_images; ++i) {
generate_bloated_jpeg(size, color_list, num_colors, block_size, output_path, quality, i, folder);
}
free(color_list);
// End time measurement
clock_t end_time = clock();
double execution_time = (double)(end_time - start_time) / CLOCKS_PER_SEC;
printf("Generated %d images in %f seconds!\n", num_images, execution_time);
return EXIT_SUCCESS;
}