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[Feat] (MG_Impl, MG_State, MG_Util, DirectGLES, DirectVulkan, MG_Test): implement ARB_clear_buffer_object correctly

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swung0x48
2026-08-16 01:12:28 -04:00
parent 14d3901d30
commit b3794f4e6a
11 changed files with 293 additions and 35 deletions
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MobileGL/MG_State/GLState/BufferState/BufferObject.cpp
+28
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@@ -250,6 +250,34 @@ namespace MobileGL::MG_State::GLState {
NotifyContentWrite(atOffset, data.size);
}
void BufferObject::FillSubData(DataPtr pattern, SizeT atOffset, SizeT size) {
MOBILEGL_ASSERT(pattern.data != nullptr && pattern.size > 0,
"FillSubData requires a non-empty pattern.");
MOBILEGL_ASSERT(size % pattern.size == 0,
"FillSubData size (%zu) must be a multiple of pattern size (%zu).", size, pattern.size);
MOBILEGL_ASSERT(atOffset <= m_size && size <= m_size - atOffset,
"FillSubData out of bounds: atOffset (%zu) + size (%zu) > m_size (%zu)", atOffset, size,
m_size);
MOBILEGL_ASSERT(!m_isMapped || (m_mappingAccess & BufferMappingAccessBit::Persistent),
"Cannot fill data while buffer is non-persistently mapped.");
if (size == 0) return;
// A clear is ordered after all earlier GPU writes. Partial clears additionally need the
// retained shadow bytes; whole-store clears need the same synchronization before writing
// an adopted persistent mapping that the GPU may still be accessing.
SyncGpuWrites();
Uint8* dst = m_resource.Bytes() + atOffset;
if (pattern.size == 1) {
Memset(dst, *static_cast<const Uint8*>(pattern.data), size);
} else {
for (SizeT at = 0; at < size; at += pattern.size) {
Memcpy(dst + at, pattern.data, pattern.size);
}
}
NotifyContentWrite(atOffset, size);
}
void BufferObject::DownloadSubData(void* dst, SizeT atOffset, SizeT size) const {
MOBILEGL_ASSERT(atOffset + size <= m_size,
"DownloadSubData out of bounds: atOffset (%zu) + size (%zu) > m_size (%zu)", atOffset, size,