clang becomes confused trying to determine which vm_distance_squared
constructor to use for a literal input of 0x7fffffffffffffff, even
though the size of the input requires it to be `long` and only one
constructor can take a `long`. Switch from an explicit
0x7fffffffffffffff to the symbolic constant INT64_MAX, which has the
same value, but a platform-appropriate suffix to force the compiler to
pick the right type.
For general clarity, switch some other instances of integer maximum
literals to symbolic constants of the same value.
This commit has no effect on the generated code (except for changes to
line numbers).
Reported-by: kreatordxx <https://github.com/dxx-rebirth/dxx-rebirth/pull/324>
Fixes: 17208cca79 ("Disallow int for vm_distance_squared")
GCC 6 `std::sort` sometimes compares an element to itself. For a normal
implementation of comparison, this is useless, but not harmful. The
render comparison predicate relies on accessing A[B[a][b]] when
comparing `a` and `b`. Array `B` has `-1` in positions where `a == b`,
which causes an access to `A[-1]`, which is undefined behavior. This
crashes when using _GLIBCXX_DEBUG:
Error: attempt to subscript container with out-of-bounds index -1, but
container only holds 8 elements.
Objects involved in the operation:
sequence "this" @ 0x0x335adf0 {
type = std::__debug::array<int, 8ul>::_Array_check_subscript<8ul>;
}
Since this is undefined behavior, non-debug builds might also misbehave.
Current data layouts make it likely that the failure would not have
externally observable consequences.
Prevent the invalid access by short-circuiting the result if `a == b`.
Past releases, when rendering an invalid primary texture, would
Int3() and then reset the texture to zero. Commit d767f7c changed the
logic to return without resetting the texture, since the reset seemed to
be unnecessary. Unfortunately, it is necessary. Some levels, including
those shipped with the retail game data, specify bogus primary textures
on some surfaces. After d767f7c, rendering a surface with an invalid
primary texture causes the surface to be invisible, even if it has a
valid secondary texture.
Remove the return statement added in d767f7c. Extend
validate_segment_side to validate the primary texture on the tested
side. When an invalid texture is found, reset it and log a diagnostic.
For built-in levels, log at level CON_VERBOSE since players cannot
readily fix the level. For external levels, log at level CON_URGENT so
that level authors know to fix their level before releasing it.
Fixes: d767f7cd5e ("Pass vcsegptridx to render_face")
build_segment_list and build_object_lists are now required for _search_mode as well (i.e. required for every frame), as the segment list is no longer a set of global variables.
Rename symbol OGL to DXX_USE_OGL to show that it is a DXX
symbol, not one inherited from a library. Move it to dxxsconf.h to
shorten the command line.
This is a mostly automated transform, but the changes to SConstruct were
manual.
git grep -lzw OGL -- '*.h' '*.cpp' | xargs -0 sed -i -e 's/\(\s*#\s*if\)def\s*OGL/\1 DXX_USE_OGL/' -e 's/\(\s*#\s*if\)ndef OGL/\1 !DXX_USE_OGL/' -e 's/\(\s*#\s*if !\?\)defined(OGL)/\1DXX_USE_OGL/'
Unlike many uses of index_sequence<N...>, this set of N... is not the
result of make_tree_index_sequence. Some callers pass sequences with
`Nn != n` for some n, so vp is not initialized as a copy of all elements
of ovp in the same order as ovp.
Fixes: fa5475aa54 ("Remove unnecessary copy of vertex points")
Rename symbol EDITOR to DXX_USE_EDITOR to show that it is a DXX
symbol, not one inherited from a library. Move it to dxxsconf.h to
shorten the command line.
This is a mostly automated transform, but the changes to SConstruct were
manual.
git grep -wl EDITOR -- '*.h' '*.cpp' | xargs sed -i -e 's/^\s*#ifdef \(EDITOR\)\>/#if DXX_USE_\1/' -e 's/\s*#\(el\)\?if \(.*\)defined(\(EDITOR\))/#\1if \2DXX_USE_\3/' -e 's/^\s*#ifndef \(EDITOR\)\>/#if !DXX_USE_\1/'
Move the skip-Viewer check from render_object up to build_object_lists
so that, instead of skipping the viewer, the viewer is not scheduled
to be rendered.
In gcc-4.7, <bits/hashtable.h> uses static_assert in a way that the
preprocessor considers to have 3 arguments. Move render_state.h up to
ensure that <bits/hashtable.h> is included before
"compiler-static_assert.h" converts static_assert into a 2 argument
macro.
gcc-4.6 fails to synthesize a move constructor to initialize
reversed_render_range; later gcc accept this.
Switch to capturing the value by const auto &&, which works in both old
and new gcc.
Modifying a by-value temporary does not affect the underlying container,
so modifying it is almost always a bug. Require use of a by-reference
capture when modification is desired.
sed -i -e 's/range_for\s*(\s*\(const\s\+\)\?auto\s\+\([[:alpha:]_]\)/range_for (const auto \2/g'
Make object rendering traverse only the subrange of segments with
objects.
Make alpha rendering traverse only the subrange of segments with alpha
blended textures.
- Make Max_linear_depth_objects const
- Skip setup of object rendering if no objects to render
- Defer setting globals until after conditional confirms a segment will
render
