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improve image decoders

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This commit is contained in:
Ishotihadus
2019-12-10 23:46:30 +09:00
parent 2271b33cdd
commit aa29a229ea
7 changed files with 248 additions and 101 deletions
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ext/decoders/native/rgb.c
+15 -6
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@@ -12,6 +12,16 @@ void decode_a8(const uint8_t* data, const int size, uint8_t* image)
}
}
void decode_r8(const uint8_t* data, const int size, uint8_t* image)
{
const uint8_t *d = data, *d_end = data + size;
for (int i = 0; d < d_end; d++) {
image[i++] = *d;
image[i++] = 0;
image[i++] = 0;
}
}
void decode_r16(const uint16_t* data, const int size, const int endian_big, uint8_t* image)
{
const uint16_t *d = data, *d_end = data + size;
@@ -20,16 +30,15 @@ void decode_r16(const uint16_t* data, const int size, const int endian_big, uint
for (int i = 0; d < d_end; d++) {
uint8_t c = *d >> 8;
image[i++] = c;
image[i++] = c;
image[i++] = c;
image[i++] = 0;
image[i++] = 0;
}
} else {
// Different endian
for (int i = 0; d < d_end; d++) {
uint8_t c = *d;
image[i++] = c;
image[i++] = c;
image[i++] = c;
image[i++] = *d;
image[i++] = 0;
image[i++] = 0;
}
}
}