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fxsdk: round RGB16 images to even widths

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This allows 4-alignment on the input to be preserved from line to line,
which is very valuable for rendering optimizations.
This commit is contained in:
Lephenixnoir 2022-05-04 17:16:08 +01:00
parent 27e60884c3
commit 6788a7b5fe
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GPG key ID: 1BBA026E13FC0495
1 changed files with 11 additions and 5 deletions
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16
fxconv/fxconv.py
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@ -1096,14 +1096,20 @@ def r5g6b5(img, color_count=0, trim_palette=False, palette_base=0, alpha=None):
# Create byte arrays with pixel data and palette data
#---
pixel_count = img.width * img.height
stride = 0
if not color_count:
size = pixel_count * 2
# In RGB16, preserve alignment between rows
stride = (img.width + 1) // 2 * 2
size = stride * img.height * 2
elif color_count == 256:
size = pixel_count
# No constraint in P8
size = img.width * img.height
stride = img.width
elif color_count == 16:
size = ((img.width + 1) // 2) * img.height
# In P4, pad whole bytes
stride = (img.width + 1) // 2
size = stride * img.height
# Result of encoding
encoded = bytearray(size)
@ -1116,8 +1122,8 @@ def r5g6b5(img, color_count=0, trim_palette=False, palette_base=0, alpha=None):
if not color_count:
c = alpha_encoding(rgb24to16(pixels[x, y]), a)
offset = (stride * y + x) * 2
encoded[offset:offset+2] = u16(c)
offset += 2
elif color_count == 16:
c = palette_remap[pixels[x, y]][0] if a > 0 else alpha