1 files changed, 110 insertions, 0 deletions
diff --git a/src/win95/txioctrl.cpp b/src/win95/txioctrl.cpp
new file mode 100644
index 0000000..53aded5
--- /dev/null
+++ b/src/win95/txioctrl.cpp
@@ -0,0 +1,110 @@
+#include "txioctrl.h"
+
+#ifdef MaxImageGroups
+
+#include "list_tem.hpp"
+
+struct ImageNumber
+{
+	int group;
+	int offset;
+
+	ImageNumber(){}
+	ImageNumber(int g,int o) : group(g), offset(o) {}
+
+	inline int operator == (ImageNumber const & in2) const
+		{ return group==in2.group && offset==in2.offset; }
+	inline int operator != (ImageNumber const & in2) const
+		{ return ! operator == (in2); }
+};
+
+static List<ImageNumber> imgs_used_by_group[MaxImageGroups];
+
+static List<int> * grps_used_by_image[MaxImageGroups][MaxImages];
+
+void MarkImageInUseByGroup(int img_group, int img_num_offset, int group_using)
+{
+	if (imgs_used_by_group[group_using].contains(ImageNumber(img_group,img_num_offset))) return;
+	
+	imgs_used_by_group[group_using].add_entry(ImageNumber(img_group,img_num_offset));
+
+	List<int> * & grps_used_by_imageR = grps_used_by_image[img_group][img_num_offset];
+
+	if (!grps_used_by_imageR)
+		grps_used_by_imageR = new List<int>(img_group); // includes itself
+
+	if (!grps_used_by_imageR->contains(group_using))
+		grps_used_by_imageR->add_entry(group_using);
+}
+
+int IsImageInUse(int img_group, int img_num_offset)
+{
+	if (grps_used_by_image[img_group][img_num_offset])
+		return 1;
+	else
+		return 0;
+}
+
+int CanDeleteImage(int img_group, int img_num_offset)
+{
+	if (grps_used_by_image[img_group][img_num_offset])
+	{
+		if (grps_used_by_image[img_group][img_num_offset]->contains(img_group))
+		{
+			grps_used_by_image[img_group][img_num_offset]->delete_entry(img_group); // remove itself
+			if (!grps_used_by_image[img_group][img_num_offset]->size())
+			{
+				delete grps_used_by_image[img_group][img_num_offset];
+				grps_used_by_image[img_group][img_num_offset] = 0;
+				return 1;
+			}
+			else
+				return 0;
+		}
+		else
+			return 0;
+	}
+	else
+		return 1;
+}
+
+void ImageGroupFreed(int img_group)
+{
+	while (imgs_used_by_group[img_group].size())
+	{
+		ImageNumber used = imgs_used_by_group[img_group].first_entry();
+
+		List<int> * & grps_used_by_imageR = grps_used_by_image[used.group][used.offset];
+
+		grps_used_by_imageR->delete_entry(img_group);
+
+		if (!grps_used_by_imageR->size())
+		{
+			NowDeleteImage(used.group,used.offset);
+			delete grps_used_by_imageR;
+			grps_used_by_imageR = 0;
+		}
+		
+		imgs_used_by_group[img_group].delete_first_entry();
+	}
+}
+
+void EnumSharedImages(int group_num, int numimages, ImageNumberCallbackFunction callback_fn, void * user)
+{
+	for (int i=0; i<numimages; ++i)
+	{
+		if (grps_used_by_image[group_num][i])
+			callback_fn(i,user);
+	}
+}
+
+void EnumLeftoverImages(int group_num, int numimages, ImageNumberCallbackFunction callback_fn, void * user)
+{
+	for (int i=numimages; i<MaxImages; ++i)
+	{
+		if (grps_used_by_image[group_num][i])
+			callback_fn(i,user);
+	}
+}
+
+#endif // MaxImageGroups