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Update pikture.c

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Nexoniarz 2026-05-13 20:16:59 +00:00 • committed by GitHub
commit 0bd5fc6f4c
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1 changed files with 31 additions and 4 deletions
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35
pikture.c
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@ -1,7 +1,7 @@
/*
pikture.c
Native PIKTURE format encoder and decoder library.
Version: 100
Version: 101
License: MIT
Made by: Nexoniarz
*/
@ -11,22 +11,37 @@ Made by: Nexoniarz
#include <stdlib.h>
#include <string.h>
#ifdef PIKT_USE_SIMD
#if defined(__x86_64__) || defined(_M_X64)
#include <immintrin.h>
#elif defined(__aarch64__) || defined(_M_ARM64)
#include <arm_neon.h>
#endif
#endif
#ifdef PIKT_USE_THREADS
#include <omp.h>
#endif
#define PIKT_MAGIC "PIK!"
#define PIKT_VERSION 5
#define PIKT_VERSION 101
#define PIKT_HASH(r, g, b, a) (((r) * 3 + (g) * 5 + (b) * 7 + (a) * 11) % 64)
typedef struct {
uint8_t r, g, b, a;
} pikt_pixel;
/* Reads a 16-bit unsigned integer in Big-Endian format */
static uint8_t system_is_be() {
uint16_t x = 1;
return *((uint8_t*)&x) == 0;
}
static uint16_t read_u16_be(FILE* f) {
uint8_t bytes[2];
fread(bytes, 1, 2, f);
return (bytes[0] << 8) | bytes[1];
}
/* Writes a 16-bit unsigned integer in Big-Endian format */
static void write_u16_be(FILE* f, uint16_t value) {
uint8_t bytes[2] = { (value >> 8) & 0xFF, value & 0xFF };
fwrite(bytes, 1, 2, f);
@ -63,6 +78,8 @@ pikture_t* pikture_load(const char* filename) {
fread(&depth, 1, 1, f);
img->channels = 4;
fread(&img->endianness, 1, 1, f);
size_t data_size = (size_t)img->width * img->height * 4;
img->pixels = (uint8_t*)malloc(data_size);
if (!img->pixels) {
@ -75,6 +92,10 @@ pikture_t* pikture_load(const char* filename) {
uint8_t r = 0, g = 0, b = 0, a = 255;
size_t ptr = 0;
#ifdef PIKT_USE_THREADS
#pragma omp parallel
#endif
while (ptr < data_size) {
int b0 = fgetc(f);
if (b0 == EOF) break;
@ -147,6 +168,9 @@ int pikture_save(const char* filename, const pikture_t* img) {
uint8_t depth = 32;
fwrite(&depth, 1, 1, f);
uint8_t current_endianness = system_is_be();
fwrite(&current_endianness, 1, 1, f);
pikt_pixel index[64] = {0};
uint8_t prev_r = 0, prev_g = 0, prev_b = 0, prev_a = 255;
int run = 0;
@ -154,6 +178,9 @@ int pikture_save(const char* filename, const pikture_t* img) {
size_t total_pixels = (size_t)img->width * img->height;
size_t px_idx = 0;
#ifdef PIKT_USE_THREADS
#pragma omp parallel
#endif
while (px_idx < total_pixels * 4) {
uint8_t r = img->pixels[px_idx++];
uint8_t g = img->pixels[px_idx++];