Import sources from 2011-03-30 iso image

1 files changed, 203 insertions, 0 deletions

diff --git a/sys/src/cmd/postscript/postbgi/postbgi.h b/sys/src/cmd/postscript/postbgi/postbgi.h
new file mode 100755
index 000000000..41e3003c1
--- /dev/null
+++ b/sys/src/cmd/postscript/postbgi/postbgi.h
@@ -0,0 +1,203 @@
+/*
+ *
+ * BGI opcodes.
+ *
+ */
+
+#define BRCHAR		033		/* rotated character mode */
+#define BCHAR		034		/* graphical character mode */
+#define BGRAPH		035		/* graphical master mode */
+
+#define BSUB		042		/* subroutine definition */
+#define BRET		043		/* end of subroutine */
+#define BCALL		044		/* subroutine call */
+
+#define BEND		045		/* end page */
+#define BERASE		046		/* erase - obsolete */
+#define BREP		047		/* repeat */
+#define BENDR		050		/* end repeat */
+
+#define BSETX		051		/* set horizontal position */
+#define BSETY		052		/* set vertical position */
+#define BSETXY		053		/* set horizontal and vertical positions */
+#define BINTEN		054		/* intensify - mark current pixel */
+
+#define BVISX		055		/* manhattan vector - change x first */
+#define BINVISX		056		/* same as BVISX but nothing drawn */
+#define BVISY		057		/* manhattan vector - change y first */
+#define BINVISY		060		/* same as BVISY but nothing drawn */
+
+#define BVEC		061		/* arbitrary long vector */
+#define BSVEC		062		/* arbitrary short vector */
+#define BRECT		063		/* outline rectangle */
+#define BPOINT1		064		/* point plot - mode 1 */
+#define BPOINT		065		/* point plot - mode 2 */
+#define BLINE		066		/* line plot */
+
+#define BCSZ		067		/* set character size */
+#define BLTY		070		/* select line type */
+#define BARC		071		/* draw circular arc */
+#define BFARC		072		/* filled circular arc */
+#define BFRECT		073		/* filled rectangle */
+#define BRASRECT	074		/* raster rectangle */
+#define BCOL		075		/* select color */
+#define BFTRAPH		076		/* filled trapezoid */
+#define BPAT		077		/* pattern are for filling - no info */
+
+#define BNOISE		0		/* from bad file format */
+
+/*
+ *
+ * Character size is controlled by the spacing of dots in a 5x7 dot matrix, which
+ * by default is set to BGISIZE.
+ *
+ */
+
+#define BGISIZE		2		/* default character grid spacing */
+
+/*
+ *
+ * Definitions used to decode the bytes read from a BGI file.
+ *
+ */
+
+#define CHMASK		0177		/* characters only use 7 bits */
+#define DMASK		077		/* data values use lower 6 bits */
+#define MSB		0100		/* used to check for data or opcode */
+#define SGNB		040		/* sign bit for integers */
+#define MSBMAG		037		/* mag of most sig byte in a BGI int */
+
+/*
+ *
+ * Descriptions of BGI vectors and what's done when they're drawn.
+ *
+ */
+
+#define X_COORD		0		/* change x next in manhattan vector */
+#define Y_COORD		1		/* same but y change comes next */
+#define LONGVECTOR	2		/* arbitrary long vector */
+#define SHORTVECTOR	3		/* components given in 6 bits */
+
+#define VISIBLE		0		/* really draw the vector */
+#define INVISIBLE	1		/* just move the current position */
+
+/*
+ *
+ * What's done with a closed path.
+ *
+ */
+
+#define OUTLINE		0		/* outline the defined path */
+#define FILL		1		/* fill it in */
+
+/*
+ *
+ * BGI line style definitions. They're used as an index into the STYLES array,
+ * which really belongs in the prologue.
+ *
+ */
+
+#define SOLID		0
+#define DOTTED		1
+#define SHORTDASH	2
+#define DASH		3
+#define LONGDASH	4
+#define DOTDASH		5
+#define THREEDOT	6
+
+#define STYLES								\
+									\
+	{								\
+	    "[]",							\
+	    "[.5 2]",							\
+	    "[2 4]",							\
+	    "[4 4]",							\
+	    "[8 4]",							\
+	    "[.5 2 4 2]",						\
+	    "[.5 2 .5 2 .5 2 4 2]"					\
+	}
+
+/*
+ *
+ * Three constants used to choose which component (RED, GREEN, or BLUE) we're
+ * interested in. BGI colors are specified as a single data byte and pulling a
+ * particular  component out of the BGI color byte is handled by procedure
+ * get_color().
+ *
+ */
+
+#define RED		0
+#define GREEN		1
+#define BLUE		2
+
+/*
+ *
+ * An array of type Disp is used to save the horizontal and vertical displacements
+ * that result after a subroutine has been called. Needed so we can properly adjust
+ * our horizontal and vertical positions after a subroutine call. Entries are made
+ * immediately after a subroutine is defined and used after the call. Subroutine
+ * names are integers that range from 0 to 63 (assigned in the BG file) and the
+ * name is used as an index into the Disp array when we save or retrieve the
+ * displacement.
+ *
+ */
+
+typedef struct {
+	int	dx;			/* horizontal and */
+	int	dy;			/* vertical displacements */
+} Disp;
+
+/*
+ *
+ * An array of type Fontmap helps convert font names requested by users into
+ * legitimate PostScript names. The array is initialized using FONTMAP, which must
+ * end with and entry that has NULL defined as its name field.
+ *
+ */
+
+typedef struct {
+	char	*name;			/* user's font name */
+	char	*val;			/* corresponding PostScript name */
+} Fontmap;
+
+#define FONTMAP								\
+									\
+	{								\
+	    "R", "Courier",						\
+	    "I", "Courier-Oblique",					\
+	    "B", "Courier-Bold",					\
+	    "CO", "Courier",						\
+	    "CI", "Courier-Oblique",					\
+	    "CB", "Courier-Bold",					\
+	    "CW", "Courier",						\
+	    "PO", "Courier",						\
+	    "courier", "Courier",					\
+	    "cour", "Courier",						\
+	    "co", "Courier",						\
+	    NULL, NULL							\
+	}
+
+/*
+ *
+ * Two macros that are useful in processing BGI files:
+ *
+ *       MAG(A, B)    - Takes bytes A and B which have been read from a BGI file
+ *                      and returns the magnitude of the integer represented by
+ *                      the two bytes.
+ *
+ *       LINESPACE(A) - Takes BGI size A and returns the number of address units
+ *                      that can be used for a reasonable interline spacing.
+ *
+ */
+
+#define MAG(A, B)	(((A & MSBMAG) << 6) | (B & DMASK))
+#define LINESPACE(A)	(8 * A)
+
+/*
+ *
+ * Some of the non-integer valued functions in postdmd.c.
+ *
+ */
+
+char	*get_font();
+