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Sanitize tangents when creating mesh surfaces to avoid triggering the compressed mesh path in the shader

This commit is contained in:
clayjohn 2023-10-11 21:34:52 -06:00
parent b1371806ad
commit e3d31837eb
4 changed files with 32 additions and 0 deletions
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5
scene/3d/sprite_3d.cpp
View File

@ -206,6 +206,11 @@ void SpriteBase3D::draw_texture_rect(Ref<Texture2D> p_texture, Rect2 p_dst_rect,
uint32_t value = 0;
value |= (uint16_t)CLAMP(res.x * 65535, 0, 65535);
value |= (uint16_t)CLAMP(res.y * 65535, 0, 65535) << 16;
if (value == 4294901760) {
// (1, 1) and (0, 1) decode to the same value, but (0, 1) messes with our compression detection.
// So we sanitize here.
value = 4294967295;
}
v_tangent = value;
}

5
scene/resources/immediate_mesh.cpp
View File

@ -208,6 +208,11 @@ void ImmediateMesh::surface_end() {
uint32_t value = 0;
value |= (uint16_t)CLAMP(t.x * 65535, 0, 65535);
value |= (uint16_t)CLAMP(t.y * 65535, 0, 65535) << 16;
if (value == 4294901760) {
// (1, 1) and (0, 1) decode to the same value, but (0, 1) messes with our compression detection.
// So we sanitize here.
value = 4294967295;
}
*tangent = value;
}

10
scene/resources/mesh.cpp
View File

@ -1156,6 +1156,11 @@ void _fix_array_compatibility(const Vector<uint8_t> &p_src, uint64_t p_old_forma
uint16_t *dst = (uint16_t *)&dst_vertex_ptr[i * dst_normal_tangent_stride + dst_offsets[Mesh::ARRAY_NORMAL]];
dst[0] = (uint16_t)CLAMP(res.x * 65535, 0, 65535);
dst[1] = (uint16_t)CLAMP(res.y * 65535, 0, 65535);
if (dst[0] == 0 && dst[1] == 65535) {
// (1, 1) and (0, 1) decode to the same value, but (0, 1) messes with our compression detection.
// So we sanitize here.
dst[0] = 65535;
}
}
src_offset += sizeof(uint8_t) * 4;
} else {
@ -1167,6 +1172,11 @@ void _fix_array_compatibility(const Vector<uint8_t> &p_src, uint64_t p_old_forma
uint16_t *dst = (uint16_t *)&dst_vertex_ptr[i * dst_normal_tangent_stride + dst_offsets[Mesh::ARRAY_NORMAL]];
dst[0] = (uint16_t)CLAMP(res.x * 65535, 0, 65535);
dst[1] = (uint16_t)CLAMP(res.y * 65535, 0, 65535);
if (dst[0] == 0 && dst[1] == 65535) {
// (1, 1) and (0, 1) decode to the same value, but (0, 1) messes with our compression detection.
// So we sanitize here.
dst[0] = 65535;
}
}
src_offset += sizeof(float) * 4;
}

12
servers/rendering_server.cpp
View File

@ -612,6 +612,12 @@ Error RenderingServer::_surface_set_data(Array p_arrays, uint64_t p_format, uint
(uint16_t)CLAMP(res.y * 65535, 0, 65535),
};
if (vector[0] == 0 && vector[1] == 65535) {
// (1, 1) and (0, 1) decode to the same value, but (0, 1) messes with our compression detection.
// So we sanitize here.
vector[0] = 65535;
}
memcpy(&vw[p_offsets[ai] + i * p_normal_stride], vector, 4);
}
} else { // PACKED_FLOAT64_ARRAY
@ -627,6 +633,12 @@ Error RenderingServer::_surface_set_data(Array p_arrays, uint64_t p_format, uint
(uint16_t)CLAMP(res.y * 65535, 0, 65535),
};
if (vector[0] == 0 && vector[1] == 65535) {
// (1, 1) and (0, 1) decode to the same value, but (0, 1) messes with our compression detection.
// So we sanitize here.
vector[0] = 65535;
}
memcpy(&vw[p_offsets[ai] + i * p_normal_stride], vector, 4);
}
}