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