1 files changed, 90 insertions, 0 deletions
diff --git a/src/T2DLL/UT2BkgndInfo.cpp b/src/T2DLL/UT2BkgndInfo.cpp
new file mode 100644
index 0000000..b62afaf
--- /dev/null
+++ b/src/T2DLL/UT2BkgndInfo.cpp
@@ -0,0 +1,90 @@
+#include "UT2BkgndInfo.h"
+
+/*static*/ BkgndInfo* UT2BkgndInfo::SetupBkgndInfo(const RECT& rect, int z) {
+	BkgndInfo *bkgndInfo = NULL;
+
+	int vRange = (rect.bottom - rect.top) / 2;
+	int hRange = (rect.right - rect.left) / 8;
+	int zRange = z / 2;
+
+	if (vRange > 0 && hRange > 0) {
+		int size = sizeof(BkgndInfo) + sizeof(void *) * (vRange - 1);
+		bkgndInfo = (BkgndInfo *) malloc(size);
+		memset(bkgndInfo, 0, size);
+
+		bkgndInfo->vRange = vRange;
+		bkgndInfo->hRange = hRange;
+		bkgndInfo->zRange = zRange;
+
+		for (int i = 0; i < vRange && bkgndInfo; i++) {
+			size = sizeof(unsigned int) * hRange;
+			bkgndInfo->arrays[i] = (unsigned int *) malloc(size);
+			memset(bkgndInfo->arrays[i], 0, size);
+			if (!bkgndInfo->arrays[i])
+				DisposeBkgndInfo(bkgndInfo);
+		}
+	}
+
+	return bkgndInfo;
+}
+
+/*static*/ void UT2BkgndInfo::DisposeBkgndInfo(BkgndInfo*& info) {
+	if (info) {
+		for (int i = 0; i < info->vRange; i++) {
+			if (info->arrays[i])
+				free(info->arrays[i]);
+		}
+
+		free(info);
+		info = NULL;
+	}
+}
+
+/*static*/ unsigned int UT2BkgndInfo::GetBkgndInfo(BkgndInfo* const inBkgndInfoPtr, int inV, int inH) {
+	unsigned int result = 0;
+
+	if (!inBkgndInfoPtr)
+		return 0;
+	if (inV < 0 || inV >= inBkgndInfoPtr->vRange)
+		return 0;
+	if (inH < 0 || inH >= inBkgndInfoPtr->hRange)
+		return 0;
+
+	unsigned int value = inBkgndInfoPtr->arrays[inV][inH];
+	value &= 0xFFFF;
+	result = value;
+	return result;
+}
+
+/*static*/ void UT2BkgndInfo::UnitToBkgndRect(const RECT& inRect, RECT& outRect) {
+	outRect.top = inRect.top / 2;
+	outRect.left = inRect.left / 8;
+	outRect.bottom = inRect.bottom / 2;
+	outRect.right = inRect.right / 8;
+
+	if ((inRect.bottom % 2) != 0)
+		outRect.bottom++;
+	if ((inRect.right % 8) != 0)
+		outRect.right++;
+}
+
+/*static*/ void UT2BkgndInfo::BkgndToUnitRect(const RECT& inRect, RECT& outRect) {
+	outRect.top = inRect.top * 2;
+	outRect.left = inRect.left * 8;
+	outRect.bottom = inRect.bottom * 2;
+	outRect.right = inRect.right * 8;
+}
+
+/*static*/ void UT2BkgndInfo::GetOffBkgndRect(int offset, RECT& rect) {
+	SetRect(&rect, 0, 0, 8, 2);
+	OffsetRect(&rect, 0, offset * 2);
+}
+
+/*static*/ void UT2BkgndInfo::ReplaceID(const BkgndInfo* info, unsigned int a, int b) {
+	for (int v = 0; v < info->vRange; v++) {
+		for (int h = 0; h < info->hRange; h++) {
+			unsigned int *p = &info->arrays[v][h];
+			if ((*p & 0xFFFF) >= a)
+				*p += b;
+		}
+	}}