Fails spectacularly -- the geometry shader is aware only of instanced
object ID, and of vertex ID not at all. The former was a corner case
TODO while I was adding non-instanced object ID visualization in
033e56ec23 and which I kinda forgot about,
the latter was discovered while trying to fix the former.
Fix in the next commit.
Hah this took a while, as there was no texture scaffolding in place at
all. Thus all this had to be added and tested for the first time:
* 2D textures
* 2D texture arrays
* Texture transformation uniforms
* Texture transformation UBOs
* Instanced texture offset
This also means that MeshVisualizer can be used to visualize arbitrary
(single-channel) integer textures now, not just render meshes with
object ID textures. Yay for feature parity!
Forgot that gl_VertexID includes the base offset in the multidraw
scenarios, so we need to take all vertices into account, not just the
largest view. The wraparound would cause nasty output differences among
drivers.
Mainly to have feature parity with Flat and Phong -- otherwise switching
to draw a wireframe on an instanced mesh would be too annoying. Also, if
we have multidraw there already, why not instancing as well.
Originally the uniform wasn't present with the assumption that users
could easily adjust color map offset to achieve the same effect. That
was however unnecessarily annoying and error-prone in cases where it's
essential to have the same object IDs from multiple draws have a
matching color, and it was complicating multidraw workflows as the color
map offset was not a part of per-draw data, but rather material data.
"Luckily", thanks to the DRAW_COUNT=1 and MATERIAL_COUNT=1 optimizations
not everything blows up, so i don't need to skip absolutely everything,
unfortunately Phong lights are affected by this insane crapfest as well
so basically nothing from Phong UBO support is tested there. FFS.
These deliberately share the same binding (because there's very little
space), but the shader wasn't guarding that. Discovered completely by
accident when adding tests for "multidraw with all the things" -- Mesa
gives just a warning, but ANGLE straight out fails the shader
compilation, so better have an assert there.
Besides expanding the tested platform set and updating thresholds where
needed, it makes more sense to list what is tested than what is not,
because when I forget to update the list it looks like I tested while I
did not.
It didn't really make sense to have a separate test case just to check a
bunch of extra extensions first. This makes it much easier to test the
UBO variants as well.
Plus the "invalid" tests don't actually need to test any extensions, as
they're supposed to fail before any extension-dependent code path is
called.
* Shader compilation failed with vertex, object and primitive ID
enabled due to the NO_GEOMETRY_SHADER define not being correctly
propagated
* Enabling just vertex ID visualization on WebGL caused an assert in
constructor, complaining that "at least one visualization feature has
to be enabled", which is wrong
* Defaults were not correctly set up for vertex ID rendering, causing
all-black render when setColor() wasn't called
* Forgot to list/bundle some ground truth test images for the test
case, causing the test to fail due to files not found
* The test asserted when generating mesh data due to an unhandled
corner case
* The test expected an ES2 assertion message on WebGL 2
* Flag::Wireframe now implicitly enables Flag::NoGeometryShader also on
WebGL. This was done only for ES2 previously, but WebGL doesn't have
(and won't have) geometry shaders, so it makes sense to do the same
there.
So don't skip the test when rendering just object/primitive/.. ID. Turns
out due to the skip this test was never executed on SwiftShader, and it
thus needs some threshold bumping.
It was rendering everything with a plain color, which is rather useless.
Moreover it wasn't consistent with TBN visualization where you might
actually want only the lines rendered and not the triangle.
Vladimír Vondruš