Skip to content

Implement parsing support for KHR_meshopt_compression #281

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
jkuhlmann merged 1 commit into from
Feb 2, 2026
Merged

Implement parsing support for KHR_meshopt_compression #281

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
14 changes: 13 additions & 1 deletion cgltf.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -296,6 +296,7 @@ typedef enum cgltf_meshopt_compression_filter {
cgltf_meshopt_compression_filter_octahedral,
cgltf_meshopt_compression_filter_quaternion,
cgltf_meshopt_compression_filter_exponential,
cgltf_meshopt_compression_filter_color,
cgltf_meshopt_compression_filter_max_enum
} cgltf_meshopt_compression_filter;

Expand All @@ -308,6 +309,7 @@ typedef struct cgltf_meshopt_compression
cgltf_size count;
cgltf_meshopt_compression_mode mode;
cgltf_meshopt_compression_filter filter;
cgltf_bool is_khr;
} cgltf_meshopt_compression;

typedef struct cgltf_buffer_view
Expand Down Expand Up @@ -1661,8 +1663,8 @@ cgltf_result cgltf_validate(cgltf_data* data)
CGLTF_ASSERT_IF((mc->mode == cgltf_meshopt_compression_mode_triangles || mc->mode == cgltf_meshopt_compression_mode_indices) && mc->filter != cgltf_meshopt_compression_filter_none, cgltf_result_invalid_gltf);

CGLTF_ASSERT_IF(mc->filter == cgltf_meshopt_compression_filter_octahedral && mc->stride != 4 && mc->stride != 8, cgltf_result_invalid_gltf);

CGLTF_ASSERT_IF(mc->filter == cgltf_meshopt_compression_filter_quaternion && mc->stride != 8, cgltf_result_invalid_gltf);
CGLTF_ASSERT_IF(mc->filter == cgltf_meshopt_compression_filter_color && mc->stride != 4 && mc->stride != 8, cgltf_result_invalid_gltf);
}
}

Expand Down Expand Up @@ -5118,6 +5120,10 @@ static int cgltf_parse_json_meshopt_compression(cgltf_options* options, jsmntok_
{
out_meshopt_compression->filter = cgltf_meshopt_compression_filter_exponential;
}
else if (cgltf_json_strcmp(tokens+i, json_chunk, "COLOR") == 0)
{
out_meshopt_compression->filter = cgltf_meshopt_compression_filter_color;
}
++i;
}
else
Expand Down Expand Up @@ -5228,6 +5234,12 @@ static int cgltf_parse_json_buffer_view(cgltf_options* options, jsmntok_t const*
out_buffer_view->has_meshopt_compression = 1;
i = cgltf_parse_json_meshopt_compression(options, tokens, i + 1, json_chunk, &out_buffer_view->meshopt_compression);
}
else if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_meshopt_compression") == 0)
{
out_buffer_view->has_meshopt_compression = 1;
out_buffer_view->meshopt_compression.is_khr = 1;
i = cgltf_parse_json_meshopt_compression(options, tokens, i + 1, json_chunk, &out_buffer_view->meshopt_compression);
}
else
{
i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_buffer_view->extensions[out_buffer_view->extensions_count++]));
Expand Down