[Misc] (MG_State/Buffer): Separate BufferState.cpp into 2 files.

MobileGL/MG_State/GLState/BufferState/BufferObject.cpp

@@ -0,0 +1,158 @@
+#include "../../../Includes.h"
+
+namespace MobileGL {
+	namespace MG_State {
+		namespace GLState {
+			BufferObject::BufferObject()
+				: m_id(0), m_size(0), m_usage(BufferUsage::StaticDraw),
+				m_isMapped(false), m_mappingAccess(BufferMappingAccessBit::Null),
+				m_dirtyRange({ 0, 0 }), m_mappedRange({ 0, 0 }) {
+			}
+
+			void BufferObject::Resize(SizeT size) {
+				m_size = size;
+				m_data.reserve(std::bit_ceil(size)); // power-of-2 reserve
+				m_data.resize(size);
+				m_dirtyRange = { 0, 0 };
+			}
+
+			void BufferObject::UploadData(DataPtr data, SizeT atOffset) {
+				assert(atOffset + data.size <= m_size);
+				assert(!m_isMapped);
+				memcpy(m_data.data() + atOffset, data.data, data.size);
+				m_dirtyRange.UnionUpdate(atOffset, atOffset + data.size);
+			}
+
+			void BufferObject::SetUsage(BufferUsage usage) {
+				m_usage = usage;
+			}
+
+			void BufferObject::ReleaseMemory() {
+				if (!m_isMapped) return;
+
+				if (Any(m_mappingAccess & BufferMappingAccessBit::Write)) { // if we wrote to the buffer
+					if (!Any(m_mappingAccess & BufferMappingAccessBit::FlushExplicit)) { // if we didn't flush explicitly
+						memcpy(m_data.data() + m_mappedRange.start,
+							m_stagingData.data(),
+							m_mappedRange.end - m_mappedRange.start);
+						m_dirtyRange.UnionUpdate(m_mappedRange.start, m_mappedRange.end);
+					}
+
+					m_stagingData.clear();
+				}
+
+				m_isMapped = false;
+				m_mappingAccess = BufferMappingAccessBit::Null;
+				m_mappedRange = { 0, 0 };
+				m_ownsStagingData = false;
+			}
+
+			void BufferObject::FlushMemoryRange(SizeT offset, SizeT length) {
+				assert(m_isMapped);
+				assert(Any(m_mappingAccess & BufferMappingAccessBit::FlushExplicit));
+				assert(Any(m_mappingAccess & BufferMappingAccessBit::Write));
+
+				SizeT start = m_mappedRange.start + offset;
+				SizeT end = start + length;
+				assert(end <= m_mappedRange.end);
+
+				memcpy(m_data.data() + start, m_stagingData.data() + offset, length);
+				m_dirtyRange.UnionUpdate(start, end);
+			}
+
+			void BufferObject::UploadSubData(DataPtr data, SizeT atOffset) {
+				assert(!m_isMapped);
+				assert(atOffset + data.size <= m_size);
+
+				memcpy(m_data.data() + atOffset, data.data, data.size);
+				m_dirtyRange.UnionUpdate(atOffset, atOffset + data.size);
+			}
+
+			void BufferObject::CopyDataFrom(const SharedPtr<BufferObject>& src, SizeT srcOffset, SizeT dstOffset, SizeT size) {
+				assert(!m_isMapped);
+				assert(!src->IsMapped());
+				assert(srcOffset + size <= src->GetSize());
+				assert(dstOffset + size <= m_size);
+
+				const Uint8* srcData = src->m_data.data() + srcOffset;
+				memcpy(m_data.data() + dstOffset, srcData, size);
+				m_dirtyRange.UnionUpdate(dstOffset, dstOffset + size);
+			}
+
+			void* BufferObject::AcquireMemory(Bool markMapped, Bool read, Bool write) {
+				if (markMapped) {
+					m_isMapped = true;
+					m_mappingAccess =
+						(read ? BufferMappingAccessBit::Read : BufferMappingAccessBit::Null) |
+						(write ? BufferMappingAccessBit::Write : BufferMappingAccessBit::Null);
+					m_mappedRange = { 0, m_size };
+
+					if (Any(m_mappingAccess & BufferMappingAccessBit::Write)) {
+						m_stagingData.resize(m_size);
+						m_ownsStagingData = true;
+
+						if (!Any(m_mappingAccess & (BufferMappingAccessBit::InvalidateRange |
+							BufferMappingAccessBit::InvalidateBuffer))) {
+							memcpy(m_stagingData.data(), m_data.data(), m_size);
+						}
+
+						return m_stagingData.data();
+					}
+				}
+
+				return m_data.data();
+			}
+
+			void* BufferObject::AcquireMemoryRange(Range1D range, BufferMappingAccessBit access) {
+				assert(range.end <= m_size && range.start <= range.end);
+				m_isMapped = true;
+				m_mappingAccess = access;
+				m_mappedRange = range;
+
+				if (Any(access & BufferMappingAccessBit::Write)) {
+					m_stagingData.resize(range.end - range.start);
+					m_ownsStagingData = true;
+
+					if (!Any(access & (BufferMappingAccessBit::InvalidateRange |
+						BufferMappingAccessBit::InvalidateBuffer))) {
+						memcpy(m_stagingData.data(), m_data.data() + range.start, m_stagingData.size());
+					}
+
+					return m_stagingData.data();
+				}
+				else {
+					m_ownsStagingData = false;
+					return m_data.data() + range.start;
+				}
+			}
+
+			void BufferObject::ClearDirty() {
+				m_dirtyRange = { 0, 0 };
+			}
+
+			SizeT BufferObject::GetSize() const {
+				return m_size;
+			}
+
+			BufferUsage BufferObject::GetUsage() const {
+				return m_usage;
+			}
+
+			Range1D BufferObject::GetDirtyRange() const {
+				return m_dirtyRange;
+			}
+
+			Bool BufferObject::IsMapped() const {
+				return m_isMapped;
+			}
+
+			Range1D BufferObject::GetMappedRange() const {
+				return m_isMapped ? m_mappedRange : Range1D{ 0, 0 };
+			}
+
+			BufferMappingAccessBit BufferObject::GetMappingAccess() const {
+				return m_isMapped ? m_mappingAccess : BufferMappingAccessBit::Null;
+			}
+		}
+	}
+}