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basisu: use @bitCast for casting bit fields

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This commit is contained in:
Ali Chraghi 2022-08-29 15:44:24 +04:30 • committed by Stephen Gutekanst
parent 1572ed7fc6
commit b5e6fb6c4f
2 changed files with 8 additions and 68 deletions
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34
libs/basisu/src/transcoder.zig
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@ -68,7 +68,7 @@ pub const Transcoder = struct {
}
pub const TranscodeParams = struct {
decode_flags: ?DecodeFlags = null,
decode_flags: DecodeFlags = .{},
/// Output row pitch in blocks or pixels.
/// Should be at least the image level's total_blocks (num_blocks_x * num_blocks_y),
/// or the total number of output pixels if fmt==cTFRGBA32.
@ -104,7 +104,7 @@ pub const Transcoder = struct {
image_index,
level_index,
@enumToInt(format),
if (params.decode_flags) |f| f.cast() else 0,
@bitCast(u32, params.decode_flags),
params.output_row_pitch orelse 0,
params.output_rows orelse 0,
)) return error.Unknown;
@ -117,39 +117,13 @@ pub const Transcoder = struct {
};
pub const DecodeFlags = packed struct {
_padding: u1 = 0,
pvrtc_decode_to_next_pow_2: bool = false,
transcode_alpha_data_to_opaque_formats: bool = false,
bc1_forbid_three_color_blocks: bool = false,
output_has_alpha_indices: bool = false,
high_quality: bool = false,
pub const Flag = enum(u32) {
pvrtc_decode_to_next_pow_2 = 2,
transcode_alpha_data_to_opaque_formats = 4,
bc1_forbid_three_color_blocks = 8,
output_has_alpha_indices = 16,
high_quality = 32,
};
pub fn from(bits: u32) DecodeFlags {
var value = DecodeFlags{};
inline for (comptime std.meta.fieldNames(Flag)) |field_name| {
if (bits & (@enumToInt(@field(Flag, field_name))) != 0) {
@field(value, field_name) = true;
}
}
return value;
}
pub fn cast(self: DecodeFlags) u32 {
var value: u32 = 0;
inline for (comptime std.meta.fieldNames(Flag)) |field_name| {
if (@field(self, field_name)) {
value |= @enumToInt(@field(Flag, field_name));
}
}
return value;
}
_padding0: u26 = 0,
};
pub const TextureFormat = enum(u5) {