Adding upstream version 2.10.34.upstream/2.10.34upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 112 insertions, 0 deletions

diff --git a/plug-ins/selection-to-path/bitmap.h b/plug-ins/selection-to-path/bitmap.h
new file mode 100644
index 0000000..98c89ac
--- /dev/null
+++ b/plug-ins/selection-to-path/bitmap.h
@@ -0,0 +1,112 @@
+/* bitmap.h: definition for a bitmap type.  No packing is done by
+ *   default; each pixel is represented by an entire byte.  Among other
+ *   things, this means the type can be used for both grayscale and binary
+ *   images.
+ *
+ * Copyright (C) 1992 Free Software Foundation, Inc.
+ *
+ * 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 3, 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, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef BITMAP_H
+#define BITMAP_H
+
+#include <stdio.h>
+#include "bounding-box.h"
+#include "types.h"
+
+
+/* If the bitmap holds 8-bit values, rather than one-bit, the
+   definition of BLACK here is wrong.  So don't use it in that case!  */
+#define WHITE 0
+#define BLACK 1
+
+
+/* The basic structure and macros to access it.  */
+typedef struct
+{
+  dimensions_type dimensions;
+  one_byte *bitmap;
+} bitmap_type;
+
+/* The dimensions of the bitmap, in pixels.  */
+#define BITMAP_DIMENSIONS(b)  ((b).dimensions)
+
+/* The pixels, represented as an array of bytes (in contiguous storage).
+   Each pixel is a single byte, even for binary fonts.  */
+#define BITMAP_BITS(b)  ((b).bitmap)
+
+/* These are convenient abbreviations for getting inside the members.  */
+#define BITMAP_WIDTH(b)  DIMENSIONS_WIDTH (BITMAP_DIMENSIONS (b))
+#define BITMAP_HEIGHT(b)  DIMENSIONS_HEIGHT (BITMAP_DIMENSIONS (b))
+
+/* This is the address of the first pixel in the row ROW.  */
+#define BITMAP_ROW(b, row)  (BITMAP_BITS (b) + (row) * BITMAP_WIDTH (b))
+
+/* This is the pixel at [ROW,COL].  */
+#define BITMAP_PIXEL(b, row, col)					\
+  (*(BITMAP_BITS (b) + (row) * BITMAP_WIDTH (b) + (col)))
+
+#define BITMAP_VALID_PIXEL(b, row, col)					\
+   	(0 <= (row) && (row) < BITMAP_HEIGHT (b) 			\
+         && 0 <= (col) && (col) < BITMAP_WIDTH (b))
+
+/* Assume that the pixel at [ROW,COL] itself is black.  */
+
+#define BITMAP_INTERIOR_PIXEL(b, row, col)				\
+   	(0 != (row) && (row) != BITMAP_HEIGHT (b) - 1 			\
+         && 0 != (col) && (col) != BITMAP_WIDTH (b) - 1			\
+         && BITMAP_PIXEL (b, row - 1, col - 1) == BLACK			\
+         && BITMAP_PIXEL (b, row - 1, col) == BLACK			\
+         && BITMAP_PIXEL (b, row - 1, col + 1) == BLACK			\
+         && BITMAP_PIXEL (b, row, col - 1) == BLACK			\
+         && BITMAP_PIXEL (b, row, col + 1) == BLACK			\
+         && BITMAP_PIXEL (b, row + 1, col - 1) == BLACK			\
+         && BITMAP_PIXEL (b, row + 1, col) == BLACK			\
+         && BITMAP_PIXEL (b, row + 1, col + 1) == BLACK)
+
+/* Allocate storage for the bits, set them all to white, and return an
+   initialized structure.  */
+extern bitmap_type new_bitmap (dimensions_type);
+
+/* Free that storage.  */
+extern void free_bitmap (bitmap_type *);
+
+/* Make a fresh copy of BITMAP in a new structure, and return it.  */
+extern bitmap_type copy_bitmap (bitmap_type bitmap);
+
+/* Return the pixels in the bitmap B enclosed by the bounding box BB.
+   The result is put in newly allocated storage.  */
+extern bitmap_type extract_subbitmap (bitmap_type b, bounding_box_type bb);
+
+/* Consider the dimensions of a bitmap as a bounding box.  The bounding
+   box returned is in bitmap coordinates, rather than Cartesian, and
+   refers to pixels, rather than edges.  Specifically, this means that
+   the maximum column is one less than results from `dimensions_to_bb
+   (BITMAP_DIMENSIONS ())'.  */
+extern bounding_box_type bitmap_to_bb (const bitmap_type);
+
+/* Return a vector of zero-based column numbers marking transitions from
+   black to white or white to black in ROW, which is of length WIDTH.
+   The end of the vector is marked with an element of length WIDTH + 1.
+   The first element always marks a white-to-black transition (or it's
+   0, if the first pixel in ROW is black).  */
+extern unsigned *bitmap_find_transitions (const one_byte *row, unsigned width);
+
+/* Print part of or all of a bitmap.  */
+extern void print_bounded_bitmap (FILE *, bitmap_type, bounding_box_type);
+extern void print_bitmap (FILE *, bitmap_type);
+
+#endif /* not BITMAP_H */
+