swung0x48/MobileGL
1
0
Fork 0
mirror of https://github.com/MobileGL-Dev/MobileGL synced 2026-09-13 22:58:30 +09:00
Code Issues Packages Projects Releases Wiki Activity

[Fix, Test] (MG_Impl/GLImpl): an indexed buffer SIZE query reports the range that was asked for, not what the buffer currently holds

Browse Source
This commit is contained in:
swung0x48
2026-08-11 20:43:28 -04:00
parent 05bef7118b
commit 6dd0201bf2
2 changed files with 61 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files
MobileGL/MG_Impl/GLImpl/Getter/GL_Getter.cpp
+9 -6
View File
@@ -722,10 +722,14 @@ namespace MobileGL::MG_Impl::GLImpl {
*data = 0;
return;
}
// GL 4.6 core table 23.4/23.5: *_BUFFER_SIZE reports the size glBindBufferRange
// was ASKED for, verbatim. It is not clamped to the buffer's storage, and it does
// not follow the buffer when a later glBufferData resizes it - a range may legally
// name bytes the buffer does not have yet. Clamping it here answered 0 for the
// common conformance shape of binding a range on a buffer that has no storage
// yet (KHR-GL43.shader_storage_buffer_object.basic-binding).
const Range1D range = bindingPoint.GetRange();
const auto start = std::min(range.start, bufferObject->GetSize());
const auto end = std::min(range.end, bufferObject->GetSize());
*data = static_cast<GLint>(end - start);
*data = static_cast<GLint>(range.end - range.start);
return;
}
default:
@@ -951,9 +955,8 @@ namespace MobileGL::MG_Impl::GLImpl {
*data = 0;
return;
}
const auto start = std::min(range.start, bufferObject->GetSize());
const auto end = std::min(range.end, bufferObject->GetSize());
*data = static_cast<GLint64>(end - start);
// Verbatim, unclamped - see the GetIntegeri_v arm.
*data = static_cast<GLint64>(range.end - range.start);
return;
}
default: