API: moved functions to files to make it easier to import to other projects

include/filters.h

@@ -0,0 +1,44 @@
+#ifndef FILTERS_H
+#define FILTERS_H
+#include "utils.h"
+
+unsigned int
+u32_put_alpha(const unsigned int clr, const unsigned char alpha);
+
+unsigned int
+u32_invert(const unsigned int clr);
+
+unsigned int
+u32_swap_rb(const unsigned int clr);
+
+unsigned int
+u32_grayscale(const unsigned int clr);
+
+unsigned int
+u32_step(const unsigned int clr, const unsigned char max);
+
+unsigned int
+u32_brighten(const unsigned int clr, const float factor);
+
+unsigned int
+u32_mix(const unsigned int clr_a, const unsigned int clr_b);
+
+unsigned int
+u32_lerp(const unsigned clr_a, const unsigned int clr_b, const float ratio);
+
+unsigned int
+u32_mask(const unsigned int clr, const char keep);
+
+unsigned int
+u32_rotl(const unsigned int clr, const int n);
+
+unsigned int
+u32_contrast(const unsigned int clr, const float factor);
+
+unsigned int
+u32_avg_gb(const unsigned int clr);
+
+unsigned int*
+box_blur(const unsigned int* src_buf, const PPM* img, const int radius);
+
+#endif

include/imgio.h

@@ -0,0 +1,24 @@
+#ifndef IMGIO_H
+#define IMGIO_H
+
+#include "utils.h"
+
+unsigned int*
+ppm_load(const char* file, PPM* m_attr);
+
+int
+ppm_save(const unsigned int* buf, const PPM img);
+
+unsigned int*
+jpeg_load(JPEG* m_attr);
+
+int
+jpeg_save(const unsigned int* src_buf, const JPEG* attr, const char* name);
+
+void
+ppm_to_jpeg(PPM* in, JPEG* out);
+
+void
+jpeg_to_ppm(JPEG* input, PPM* out);
+
+#endif

include/transformations.h

@@ -0,0 +1,15 @@
+#ifndef TRANSFORMATIONS_H
+#define TRANSFORMATIONS_H
+
+#include "utils.h"
+
+unsigned int*
+ppm_flip_h(const unsigned int* buf, const PPM img);
+
+unsigned int*
+ppm_flip_v(const unsigned int* buf, const PPM img);
+
+unsigned int*
+u32_rotate(const unsigned int* buf, PPM* m_img, const int len);
+
+#endif

include/utils.h

@@ -0,0 +1,60 @@
+#ifndef UTILS_H
+#define UTILS_H
+
+#define BYTE_A 0xFF000000
+#define BYTE_R 0x00FF0000
+#define BYTE_G 0x0000FF00
+#define BYTE_B 0x000000FF
+#define BYTE_RGB 0x00FFFFFF
+#define BYTE 0xFF
+#define LONG_BYTE 0xFFFF
+
+#define SHIFT_8 8
+#define SHIFT_16 16
+#define SHIFT_24 24
+
+#define MAX 255
+#define HALF_MAX ((int)(MAX / 2) + 1)
+
+#define DECODE_A(clr) (((clr) >> SHIFT_24) & BYTE)
+#define DECODE_R(clr) (((clr) >> SHIFT_16) & BYTE)
+#define DECODE_G(clr) (((clr) >> SHIFT_8) & BYTE)
+#define DECODE_B(clr) ((clr) & BYTE)
+
+#define ENCODE_RGB(r, g, b)                                                    \
+	(((unsigned int)(MAX) << SHIFT_24) | ((unsigned int)(r) << SHIFT_16) | \
+	 ((unsigned int)(g) << SHIFT_8) | (unsigned int)(b))
+
+#define ENCODE_ARGB(a, r, g, b)                                              \
+	(((unsigned int)(a) << SHIFT_24) | ((unsigned int)(r) << SHIFT_16) | \
+	 ((unsigned int)(g) << SHIFT_8) | (unsigned int)(b))
+
+#define ENCODE_BGRA(b, g, r, a)                                              \
+	(((unsigned int)(b) << SHIFT_24) | ((unsigned int)(g) << SHIFT_16) | \
+	 ((unsigned int)(r) << SHIFT_8) | (unsigned int)(a))
+
+#define CLAMP_MAX(x) (((x) > MAX) ? MAX : (x))
+#define CLAMP_MIN(x) (((x) < 0) ? 0 : (x))
+
+typedef struct
+{
+	int width, height;
+	int len;
+	char* name;
+	char fmt;
+} PPM;
+
+typedef struct
+{
+	int width, height;
+	int len;
+	char* name;
+} JPEG;
+
+unsigned long
+u32to_u64(const unsigned int clr);
+
+unsigned int
+u64to_u32(const unsigned long clr, const unsigned long u64_div);
+
+#endif