1 files changed, 170 insertions, 0 deletions
diff --git a/src/libs/graphics/pixmap.c b/src/libs/graphics/pixmap.c
new file mode 100644
index 0000000..6e68244
--- /dev/null
+++ b/src/libs/graphics/pixmap.c
@@ -0,0 +1,170 @@
+//Copyright Paul Reiche, Fred Ford. 1992-2002
+
+/*
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include "gfxintrn.h"
+#include "libs/log.h"
+
+DRAWABLE
+GetFrameParentDrawable (FRAME f)
+{
+	if (f != NULL)
+	{
+		return f->parent;
+	}
+	return NULL;
+}
+
+FRAME
+CaptureDrawable (DRAWABLE DrawablePtr)
+{
+	if (DrawablePtr)
+	{
+		return &DrawablePtr->Frame[0];
+	}
+
+	return NULL;
+}
+
+DRAWABLE
+ReleaseDrawable (FRAME FramePtr)
+{
+	if (FramePtr != 0)
+	{
+		DRAWABLE Drawable;
+
+		Drawable = GetFrameParentDrawable (FramePtr);
+
+		return (Drawable);
+	}
+
+	return NULL;
+}
+
+COUNT
+GetFrameCount (FRAME FramePtr)
+{
+	DRAWABLE_DESC *DrawablePtr;
+
+	if (FramePtr == 0)
+		return (0);
+
+	DrawablePtr = GetFrameParentDrawable (FramePtr);
+	return DrawablePtr->MaxIndex + 1;
+}
+
+COUNT
+GetFrameIndex (FRAME FramePtr)
+{
+	if (FramePtr == 0)
+		return (0);
+
+	return FramePtr->Index;
+}
+
+FRAME
+SetAbsFrameIndex (FRAME FramePtr, COUNT FrameIndex)
+{
+	if (FramePtr != 0)
+	{
+		DRAWABLE_DESC *DrawablePtr;
+
+		DrawablePtr = GetFrameParentDrawable (FramePtr);
+
+		FrameIndex = FrameIndex	% (DrawablePtr->MaxIndex + 1);
+		FramePtr = &DrawablePtr->Frame[FrameIndex];
+	}
+
+	return FramePtr;
+}
+
+FRAME
+SetRelFrameIndex (FRAME FramePtr, SIZE FrameOffs)
+{
+	if (FramePtr != 0)
+	{
+		COUNT num_frames;
+		DRAWABLE_DESC *DrawablePtr;
+
+		DrawablePtr = GetFrameParentDrawable (FramePtr);
+		num_frames = DrawablePtr->MaxIndex + 1;
+		if (FrameOffs < 0)
+		{
+			while ((FrameOffs += num_frames) < 0)
+				;
+		}
+
+		FrameOffs = ((SWORD)FramePtr->Index + FrameOffs) % num_frames;
+		FramePtr = &DrawablePtr->Frame[FrameOffs];
+	}
+
+	return FramePtr;
+}
+
+FRAME
+SetEquFrameIndex (FRAME DstFramePtr, FRAME SrcFramePtr)
+{
+	COUNT Index;
+
+	if (!DstFramePtr || !SrcFramePtr)
+		return 0;
+
+	Index = GetFrameIndex (SrcFramePtr);
+#ifdef DEBUG
+	{
+		DRAWABLE_DESC *DrawablePtr = GetFrameParentDrawable (DstFramePtr);
+		if (Index > DrawablePtr->MaxIndex)
+			log_add (log_Debug, "SetEquFrameIndex: source index (%d) beyond "
+					"destination range (%d)", (int)Index,
+					(int)DrawablePtr->MaxIndex);
+	}
+#endif
+	
+	return SetAbsFrameIndex (DstFramePtr, Index);
+}
+
+FRAME
+IncFrameIndex (FRAME FramePtr)
+{
+	DRAWABLE_DESC *DrawablePtr;
+
+	if (FramePtr == 0)
+		return (0);
+
+	DrawablePtr = GetFrameParentDrawable (FramePtr);
+	if (FramePtr->Index < DrawablePtr->MaxIndex)
+		return ++FramePtr;
+	else
+		return DrawablePtr->Frame;
+}
+
+FRAME
+DecFrameIndex (FRAME FramePtr)
+{
+	if (FramePtr == 0)
+		return (0);
+
+	if (FramePtr->Index > 0)
+		return --FramePtr;
+	else
+	{
+		DRAWABLE_DESC *DrawablePtr;
+
+		DrawablePtr = GetFrameParentDrawable (FramePtr);
+		return &DrawablePtr->Frame[DrawablePtr->MaxIndex];
+	}
+}