From e241843bec22600ab4ef98e7a085e82aac73fc93 Mon Sep 17 00:00:00 2001
From: Eugene Sandulenko
Date: Sun, 15 Feb 2009 11:39:07 +0000
Subject: - Remove some unneeded files - Mass rename .c to .cpp

svn-id: r38227
---
 engines/sci/gfx/gfx_line.cpp | 96 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 engines/sci/gfx/gfx_line.cpp

(limited to 'engines/sci/gfx/gfx_line.cpp')

diff --git a/engines/sci/gfx/gfx_line.cpp b/engines/sci/gfx/gfx_line.cpp
new file mode 100644
index 0000000000..01b6a8fd2a
--- /dev/null
+++ b/engines/sci/gfx/gfx_line.cpp
@@ -0,0 +1,96 @@
+/***************************************************************************
+ gfx_line.c Copyright (C) 2000 Christoph Reichenbach
+
+
+ This program may be modified and copied freely according to the terms of
+ the GNU general public license (GPL), as long as the above copyright
+ notice and the licensing information contained herein are preserved.
+
+ Please refer to www.gnu.org for licensing details.
+
+ This work is provided AS IS, without warranty of any kind, expressed or
+ implied, including but not limited to the warranties of merchantibility,
+ noninfringement, and fitness for a specific purpose. The author will not
+ be held liable for any damage caused by this work or derivatives of it.
+
+ By using this source code, you agree to the licensing terms as stated
+ above.
+
+
+ Please contact the maintainer for bug reports or inquiries.
+
+ Current Maintainer:
+
+    Christoph Reichenbach (CR) <jameson@linuxgames.com>
+
+***************************************************************************/
+
+#define LINEMACRO(startx, starty, deltalinear, deltanonlinear, linearvar, nonlinearvar, \
+                  linearend, nonlinearstart, linearmod, nonlinearmod) \
+   x = (startx); y = (starty); \
+   incrNE = ((deltalinear) > 0)? (deltalinear) : -(deltalinear); \
+   incrNE <<= 1; \
+   deltanonlinear <<= 1; \
+   incrE = ((deltanonlinear) > 0) ? -(deltanonlinear) : (deltanonlinear);  \
+   d = nonlinearstart-1;  \
+   while (linearvar != (linearend)) { \
+     memcpy(buffer + linewidth * y + x, &color, PIXELWIDTH); \
+     linearvar += linearmod; \
+     if ((d+=incrE) < 0) { \
+       d += incrNE; \
+       nonlinearvar += nonlinearmod; \
+     }; \
+   }; \
+   memcpy(buffer + linewidth * y + x, &color, PIXELWIDTH);
+
+
+static inline
+void DRAWLINE_FUNC(byte *buffer, int linewidth, point_t start, point_t end, unsigned int color)
+{
+	int dx, dy, incrE, incrNE, d, finalx, finaly;
+	int x = start.x;
+	int y = start.y;
+	dx = end.x - start.x;
+	dy = end.y - start.y;
+	finalx = end.x;
+	finaly = end.y;
+#ifdef WORDS_BIGENDIAN
+        color = GUINT32_SWAP_LE_BE_CONSTANT(color);
+#endif
+	dx = abs(dx);
+	dy = abs(dy);
+
+	if (dx > dy) {
+		if (finalx < x) {
+			if (finaly < y) { /* llu == left-left-up */
+				LINEMACRO(x, y, dx, dy, x, y, finalx, dx, -PIXELWIDTH, -1);
+			} else {         /* lld */
+				LINEMACRO(x, y, dx, dy, x, y, finalx, dx, -PIXELWIDTH, 1);
+			}
+		} else { /* x1 >= x */
+			if (finaly < y) { /* rru */
+				LINEMACRO(x, y, dx, dy, x, y, finalx, dx, PIXELWIDTH, -1);
+			} else {         /* rrd */
+				LINEMACRO(x, y, dx, dy, x, y, finalx, dx, PIXELWIDTH, 1);
+			}
+		}
+	} else { /* dx <= dy */
+		if (finaly < y) {
+			if (finalx < x) { /* luu */
+				LINEMACRO(x, y, dy, dx, y, x, finaly, dy, -1, -PIXELWIDTH);
+			} else {         /* ruu */
+				LINEMACRO(x, y, dy, dx, y, x, finaly, dy, -1, PIXELWIDTH);
+			}
+		} else { /* y1 >= y */
+			if (finalx < x) { /* ldd */
+				LINEMACRO(x, y, dy, dx, y, x, finaly, dy, 1, -PIXELWIDTH);
+			} else {         /* rdd */
+				LINEMACRO(x, y, dy, dx, y, x, finaly, dy, 1, PIXELWIDTH);
+			}
+		}
+	}
+}
+
+
+
+#undef LINEMACRO
-- 
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