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modifications for v2.5

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This commit is contained in:
Richard Geldreich
2026-07-01 13:16:04 -04:00
parent e5aa8306f3
commit afb3d4aef2
7 changed files with 58 additions and 9 deletions
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13
python/lowlevel_test_native/example_capi_python.py
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@@ -271,11 +271,13 @@ def transcode_ktx2_file(ktx2_data: bytes) -> int:
basis_tex_format = bt.ktx2_get_basis_tex_format(ktx2_handle)
block_width = bt.ktx2_get_block_width(ktx2_handle)
block_height = bt.ktx2_get_block_height(ktx2_handle)
deblocking_filter_index = bt.ktx2_get_deblocking_filter_index(ktx2_handle)
is_srgb = bt.ktx2_is_srgb(ktx2_handle)
print(f"KTX2 Dimensions: {width}x{height}, Levels={levels}, Faces={faces}, Layers={layers}")
print(f"basis_tex_format: {basis_tex_format}")
print(f"Block dimensions: {block_width}x{block_height}")
print(f"deblocking_filter_index: {deblocking_filter_index}")
print(f"is sRGB: {is_srgb}")
if layers < 1:
@@ -314,12 +316,16 @@ def transcode_ktx2_file(ktx2_data: bytes) -> int:
rgba_ofs = bt.alloc(trans_size_rgba)
print(f" RGBA buf ofs=0x{rgba_ofs:x}, size={trans_size_rgba}")
# The transcoder wants the output buffer size in blocks (GPU formats) or pixels (uncompressed),
# NOT bytes -- it's used as a buffer-overrun guard. For RGBA32 that's the pixel count.
rgba_buf_pixels = trans_size_rgba // bt.basis_get_bytes_per_block_or_pixel(TF.TF_RGBA32)
decode_flags = 0
ok = bt.ktx2_transcode_image_level(
ktx2_handle,
level_index, layer_index, face_index,
rgba_ofs,
trans_size_rgba,
rgba_buf_pixels,
TF.TF_RGBA32,
decode_flags,
0, 0, -1, -1,
@@ -346,11 +352,14 @@ def transcode_ktx2_file(ktx2_data: bytes) -> int:
astc_ofs = bt.alloc(trans_size_astc)
print(f" ASTC buf ofs=0x{astc_ofs:x}, size={trans_size_astc}")
# Buffer size in blocks (not bytes) -- ASTC is 16 bytes/block.
astc_buf_blocks = trans_size_astc // bt.basis_get_bytes_per_block_or_pixel(target_tf)
ok = bt.ktx2_transcode_image_level(
ktx2_handle,
level_index, layer_index, face_index,
astc_ofs,
trans_size_astc,
astc_buf_blocks,
target_tf,
0, 0, 0, -1, -1,
trans_state