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add packers for RGB;15/16 and BGR;15/16

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This commit is contained in:
Yay295 2024-04-25 21:20:41 -05:00
parent 1138ea5370
commit 0ad15ef334
2 changed files with 56 additions and 0 deletions
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4
Tests/test_lib_pack.py
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@ -67,6 +67,10 @@ class TestLibPack:
def test_RGB(self) -> None:
self.assert_pack("RGB", "RGB", 3, (1, 2, 3), (4, 5, 6), (7, 8, 9))
self.assert_pack("RGB", "RGB;15", b"\xe0\x81\x00\x88", (8, 131, 0), (24, 0, 8))
self.assert_pack("RGB", "BGR;15", b"\xe0\x81\x00\x88", (0, 131, 8), (8, 0, 24))
self.assert_pack("RGB", "RGB;16", b"\xe0\x01\xe0\x13", (8, 64, 0), (24, 129, 0))
self.assert_pack("RGB", "BGR;16", b"\xe0\x01\xe0\x13", (0, 64, 8), (0, 129, 24))
self.assert_pack(
"RGB", "RGBX", b"\x01\x02\x03\xff\x05\x06\x07\xff", (1, 2, 3), (5, 6, 7)
)

52
src/libImaging/Pack.c
View File

@ -281,6 +281,30 @@ ImagingPackRGB(UINT8 *out, const UINT8 *in, int pixels) {
#endif
}
void
ImagingPackRGB15(UINT8 *out, const UINT8 *in, int pixels) {
for (int i = 0; i < pixels; out += 2, in += 4, i++) {
/* XRGB, 1/5/5/5 bits per pixel, little-endian */
const UINT8 r = (UINT16)in[0] * 31 / 255;
const UINT8 g = (UINT16)in[1] * 31 / 255;
const UINT8 b = (UINT16)in[2] * 31 / 255;
out[1] = 0x80 | (r << 2) | (g >> 3);
out[0] = (g << 5) | b;
}
}
void
ImagingPackRGB16(UINT8 *out, const UINT8 *in, int pixels) {
for (int i = 0; i < pixels; out += 2, in += 4, i++) {
/* RGB, 5/6/5 bits per pixel, little-endian */
const UINT8 r = (UINT16)in[0] * 31 / 255;
const UINT8 g = (UINT16)in[1] * 63 / 255;
const UINT8 b = (UINT16)in[2] * 31 / 255;
out[1] = (r << 3) | (g >> 3);
out[0] = (g << 5) | b;
}
}
void
ImagingPackXRGB(UINT8 *out, const UINT8 *in, int pixels) {
int i;
@ -308,6 +332,30 @@ ImagingPackBGR(UINT8 *out, const UINT8 *in, int pixels) {
}
}
void
ImagingPackBGR15(UINT8 *out, const UINT8 *in, int pixels) {
for (int i = 0; i < pixels; out += 2, in += 4, i++) {
/* XBGR, 1/5/5/5 bits per pixel, little-endian */
const UINT8 r = (UINT16)in[0] * 31 / 255;
const UINT8 g = (UINT16)in[1] * 31 / 255;
const UINT8 b = (UINT16)in[2] * 31 / 255;
out[1] = 0x80 | (b << 2) | (g >> 3);
out[0] = (g << 5) | r;
}
}
void
ImagingPackBGR16(UINT8 *out, const UINT8 *in, int pixels) {
for (int i = 0; i < pixels; out += 2, in += 4, i++) {
/* BGR, 5/6/5 bits per pixel, little-endian */
const UINT8 r = (UINT16)in[0] * 31 / 255;
const UINT8 g = (UINT16)in[1] * 63 / 255;
const UINT8 b = (UINT16)in[2] * 31 / 255;
out[1] = (b << 3) | (g >> 3);
out[0] = (g << 5) | r;
}
}
void
ImagingPackBGRX(UINT8 *out, const UINT8 *in, int pixels) {
int i;
@ -573,10 +621,14 @@ static struct {
/* true colour */
{"RGB", "RGB", 24, ImagingPackRGB},
{"RGB", "RGB;15", 16, ImagingPackRGB15},
{"RGB", "RGB;16", 16, ImagingPackRGB16},
{"RGB", "RGBX", 32, copy4},
{"RGB", "RGBA", 32, copy4},
{"RGB", "XRGB", 32, ImagingPackXRGB},
{"RGB", "BGR", 24, ImagingPackBGR},
{"RGB", "BGR;15", 16, ImagingPackBGR15},
{"RGB", "BGR;16", 16, ImagingPackBGR16},
{"RGB", "BGRX", 32, ImagingPackBGRX},
{"RGB", "XBGR", 32, ImagingPackXBGR},
{"RGB", "RGB;L", 24, packRGBL},