Ishotihadus
103 lines
2.9 KiB
C
103 lines
2.9 KiB
C
#include "rgb.h"
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#include <math.h>
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#include <stdint.h>
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#include "color.h"
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#include "fp16.h"
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int decode_a8(const uint8_t *const data, const long size, uint8_t *image) {
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const uint8_t *d = data, *d_end = data + size;
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for (int i = 0; d < d_end; d++) {
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image[i++] = *d;
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image[i++] = *d;
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image[i++] = *d;
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}
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return 1;
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}
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int decode_r8(const uint8_t *const data, const long size, uint8_t *image) {
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const uint8_t *d = data, *d_end = data + size;
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for (int i = 0; d < d_end; d++) {
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image[i++] = *d;
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image[i++] = 0;
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image[i++] = 0;
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}
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return 1;
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}
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int decode_r16(const uint8_t *const data, const long size, const int endian_big, uint8_t *image) {
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const uint8_t *d = endian_big ? data : data + 1;
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const uint8_t *d_end = data + size * 2;
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for (int i = 0; d < d_end; d += 2) {
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image[i++] = *d;
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image[i++] = 0;
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image[i++] = 0;
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}
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return 1;
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}
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int decode_rgb565(const uint16_t *const data, const long size, const int endian_big, uint8_t *image) {
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const uint16_t *d = data, *d_end = data + size;
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if (endian_big)
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for (; d < d_end; d++, image += 3)
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rgb565_bep(*d, image);
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else
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for (; d < d_end; d++, image += 3)
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rgb565_lep(*d, image);
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return 1;
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}
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static inline uint8_t u16_f16_u8(const uint16_t val) {
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float f = fp16_ieee_to_fp32_value(val);
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if (!isfinite(f) || f < 0)
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return 0;
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else if (f > 1)
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return 255;
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else
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return roundf(f * 255);
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}
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int decode_rhalf(const uint16_t *data, const long size, const int endian_big, uint8_t *image) {
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if (endian_big) {
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for (long i = 0; i < size; i++, data++) {
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*image++ = u16_f16_u8(bton16(*data));
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*image++ = 0;
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*image++ = 0;
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}
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} else {
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for (long i = 0; i < size; i++, data++) {
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*image++ = u16_f16_u8(lton16(*data));
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*image++ = 0;
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*image++ = 0;
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}
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}
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return 1;
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}
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int decode_rghalf(const uint16_t *data, const long size, const int endian_big, uint8_t *image) {
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if (endian_big) {
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for (long i = 0; i < size; i++, data++, image++) {
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*image++ = u16_f16_u8(bton16(*data++));
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*image++ = u16_f16_u8(bton16(*data++));
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*image++ = 0;
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}
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} else {
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for (long i = 0; i < size; i++, data++) {
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*image++ = u16_f16_u8(lton16(*data++));
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*image++ = u16_f16_u8(lton16(*data++));
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*image++ = 0;
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}
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}
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return 1;
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}
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int decode_rgbahalf(const uint16_t *data, const long size, const int endian_big, uint8_t *image) {
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long lsize = size * 4;
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if (endian_big)
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for (long i = 0; i < lsize; i++, data++, image++)
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*image = u16_f16_u8(bton16(*data));
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else
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for (long i = 0; i < lsize; i++, data++, image++)
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*image = u16_f16_u8(lton16(*data));
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return 1;
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}
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