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Support accessing I;16N pixels

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This commit is contained in:
Andrew Murray 2022-12-28 16:55:59 +11:00
parent 8cfc25618f
commit a0e1608f4f
3 changed files with 15 additions and 17 deletions
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22
Tests/test_image_access.py
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@ -266,15 +266,10 @@ class TestCffi(AccessTest):
# self._test_get_access(hopper('PA')) # PA -- how do I make a PA image?
self._test_get_access(hopper("F"))
im = Image.new("I;16", (10, 10), 40000)
self._test_get_access(im)
im = Image.new("I;16L", (10, 10), 40000)
self._test_get_access(im)
im = Image.new("I;16B", (10, 10), 40000)
self._test_get_access(im)
for mode in ("I;16", "I;16L", "I;16B", "I;16N", "I"):
im = Image.new(mode, (10, 10), 40000)
self._test_get_access(im)
im = Image.new("I", (10, 10), 40000)
self._test_get_access(im)
# These don't actually appear to be modes that I can actually make,
# as unpack sets them directly into the I mode.
# im = Image.new('I;32L', (10, 10), -2**10)
@ -313,15 +308,10 @@ class TestCffi(AccessTest):
# self._test_set_access(i, (128, 128)) #PA -- undone how to make
self._test_set_access(hopper("F"), 1024.0)
im = Image.new("I;16", (10, 10), 40000)
self._test_set_access(im, 45000)
im = Image.new("I;16L", (10, 10), 40000)
self._test_set_access(im, 45000)
im = Image.new("I;16B", (10, 10), 40000)
self._test_set_access(im, 45000)
for mode in ("I;16", "I;16L", "I;16B", "I;16N", "I"):
im = Image.new(mode, (10, 10), 40000)
self._test_set_access(im, 45000)
im = Image.new("I", (10, 10), 40000)
self._test_set_access(im, 45000)
# im = Image.new('I;32L', (10, 10), -(2**10))
# self._test_set_access(im, -(2**13)+1)
# im = Image.new('I;32B', (10, 10), 2**10)

1
src/PIL/PyAccess.py
View File

@ -318,6 +318,7 @@ mode_map = {
"1": _PyAccess8,
"L": _PyAccess8,
"P": _PyAccess8,
"I;16N": _PyAccessI16_N,
"LA": _PyAccess32_2,
"La": _PyAccess32_2,
"PA": _PyAccess32_2,

9
src/libImaging/Access.c
View File

@ -13,7 +13,7 @@
/* use make_hash.py from the pillow-scripts repository to calculate these values */
#define ACCESS_TABLE_SIZE 27
#define ACCESS_TABLE_HASH 3078
#define ACCESS_TABLE_HASH 33051
static struct ImagingAccessInstance access_table[ACCESS_TABLE_SIZE];
@ -92,6 +92,12 @@ get_pixel_16B(Imaging im, int x, int y, void *color) {
#endif
}
static void
get_pixel_16(Imaging im, int x, int y, void *color) {
UINT8 *in = (UINT8 *)&im->image[y][x + x];
memcpy(color, in, sizeof(UINT16));
}
static void
get_pixel_32(Imaging im, int x, int y, void *color) {
memcpy(color, &im->image32[y][x], sizeof(INT32));
@ -186,6 +192,7 @@ ImagingAccessInit() {
ADD("I;16", get_pixel_16L, put_pixel_16L);
ADD("I;16L", get_pixel_16L, put_pixel_16L);
ADD("I;16B", get_pixel_16B, put_pixel_16B);
ADD("I;16N", get_pixel_16, put_pixel_16L);
ADD("I;32L", get_pixel_32L, put_pixel_32L);
ADD("I;32B", get_pixel_32B, put_pixel_32B);
ADD("F", get_pixel_32, put_pixel_32);