From c068f22329d5cc722622a2183bbb22eef2093df7 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@gmail.com>
Date: Mon, 24 Aug 2026 11:16:07 +0200
Subject: initial import

---
 src/libparsec/include/od_rast.h | 124 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 124 insertions(+)
 create mode 100644 src/libparsec/include/od_rast.h

(limited to 'src/libparsec/include/od_rast.h')

diff --git a/src/libparsec/include/od_rast.h b/src/libparsec/include/od_rast.h
new file mode 100644
index 0000000..2d5e91b
--- /dev/null
+++ b/src/libparsec/include/od_rast.h
@@ -0,0 +1,124 @@
+/*
+ * PARSEC HEADER (OBJECT)
+ * Rasterization Types V1.70
+ *
+ * Copyright (c) Markus Hadwiger 1995-1999
+ * All Rights Reserved.
+ */
+
+#ifndef _OD_RAST_H_
+#define _OD_RAST_H_
+
+
+// coordinate on actual screen (integral component on the integer lattice) ----
+//
+typedef dword	ugrid_t;		// unsigned!
+typedef int32_t	sgrid_t;		// signed!
+typedef rastv_t	fgrid_t;
+
+
+// 2-D point in unsigned integer coordinates (always >= 0) --------------------
+//
+struct UPoint {
+
+	ugrid_t		X;				// unsigned!
+	ugrid_t		Y;				// unsigned!
+};
+
+
+// 2-D point in screen coordinates (used in vertex list for the edge tracer) --
+//
+struct SPoint {
+
+	sgrid_t		X;				// signed!
+	sgrid_t		Y;				// signed!
+};
+
+
+// extended version of SPoint structure; contains z and color info ------------
+//
+struct SPointEx {
+
+	sgrid_t		X;				// signed!
+	sgrid_t		Y;				// signed!
+	depth_t		View_Z; 		// Z coordinate in view space (for buffer fill)
+	dword		RGBA;			// RGBA color (8-bit channels)
+};
+
+
+// 2-D point in screen coordinates with fractional part -----------------------
+//
+struct FPoint {
+
+	fgrid_t		X;				// 8 bytes
+	fgrid_t		Y;
+};
+
+
+// defines a polygon that should by rendered and drawn to the screen; ---------
+// created after projection of 3-D polygon; scaled to screen coordinates;
+// used only by edge tracer (must be filled from the object structure)
+//
+struct SVertexList {
+
+	dword		VCount; 		// number of vertices in list
+	SPoint		Vertices[ 1 ];	// first element of vertex list (array)
+};
+
+
+// list of extended SPoints ---------------------------------------------------
+//
+struct SVertexExList {
+
+	dword		VCount;			// number of vertices in list
+	SPointEx	Vertices[ 1 ];	// first element of vertex list (array)
+};
+
+
+// defines single horizontal span; used for horizontal span list structure ----
+// the span starts at XLeft and ends at XRight (inclusively)
+//
+struct HSpan {
+
+	ugrid_t		XLeft;			// size is 8 bytes
+	ugrid_t		XRight;
+};
+
+
+// extended version of HSpan structure; contains z and lighting info ----------
+//
+struct HSpanEx {
+
+	ugrid_t		XLeft;			// size is 16 bytes
+	ugrid_t		XRight;
+	word		ZLeft;
+	word		ILeft;
+	word		ZRight;
+	word		IRight;
+};
+
+
+// stores list of horizontal spans; created by polygon edge-tracer; -----------
+// used by low level polygon drawing/rendering functions
+//
+struct HSpanList {
+
+	dword		Height; 		// length of list (height of bounding rectangle)
+	ugrid_t		TopY;			// lowest y coordinate of polygon vertices
+	HSpan		HSpans[ 1 ];	// first element of horizontal span list (array)
+};
+
+
+// list of extended HSpans ----------------------------------------------------
+//
+struct HSpanExList {
+
+	dword		Height;			// length of list (height of bounding rectangle)
+	ugrid_t		TopY;			// lowest y coordinate of polygon vertices
+	HSpanEx 	HSpans[ 1 ];	// first element of horizontal span list (array)
+};
+
+
+#endif // _OD_RAST_H_
+
+
-- 
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