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freebsd-ports/math/gnuplot+/files/patch-xh
Steve Price d80572ef73 o Fix Configuration Option for readline library 
o Add patch to avoid divide-by-zero trap
o Merge patches for gnuplot-3.7.1

PR:		16120
Submitted by:	Akio Morita <amorita@meadow.scphys.kyoto-u.ac.jp>
Reviewed by:	maintainer
2000-01-24 06:19:03 +00:00

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# png-web216.4
--- bitmap.c.ORIG Mon Oct 11 18:10:54 1999
+++ bitmap.c Thu Dec 2 20:41:29 1999
@@ -1,5 +1,5 @@
#ifndef lint
-static char *RCSid = "$Id: bitmap.c,v 1.2.2.2 1999/10/11 17:10:54 lhecking Exp $";
+static char *RCSid = "$Id: bitmap.c,v 1.2.2.3 1999/11/30 15:07:49 lhecking Exp $";
#endif
/* GNUPLOT - bitmap.c */
@@ -846,8 +846,6 @@
}
-/* Currently unused */
-#if 1 /* HBB 991008: used by PNG, now */
/*
* get pixel (x,y) value
*/
@@ -857,7 +855,7 @@
{
register unsigned int row;
register unsigned char mask;
- register unsigned char value;
+ register unsigned char value = 0;
int i;
if (b_rastermode) {
@@ -876,10 +874,10 @@
row -= b_psize;
value <<= 1;
}
- return(value);
- }
- else
- {
+/* HBB 991123: the missing '>>1' was the 'every second color' problem
+ * with PNG in 3.8a...*/
+ return(value>>1);
+ } else {
#ifdef BITMAPDEBUG
if (b_rastermode)
fprintf(stderr, "Warning: getpixel(%d,%d) out of bounds\n",
@@ -890,7 +888,6 @@
return(0);
}
}
-#endif /* 0 */
/*
--- bitmap.h.ORIG Wed Sep 29 14:48:16 1999
+++ bitmap.h Thu Dec 2 20:41:29 1999
@@ -1,4 +1,4 @@
-/* $Id: bitmap.h,v 1.1.1.2.2.1 1999/09/29 13:48:16 lhecking Exp $ */
+/* $Id: bitmap.h,v 1.1.1.2.2.2 1999/11/30 15:07:49 lhecking Exp $ */
/* GNUPLOT - bitmap.h */
@@ -101,7 +101,7 @@
void b_makebitmap __PROTO((unsigned int x, unsigned int y, unsigned int planes));
void b_freebitmap __PROTO((void));
void b_setpixel __PROTO((unsigned int x, unsigned int y, unsigned int value));
-/* unused unsigned int b_getpixel __PROTO((unsigned int x, unsigned int y)); */
+unsigned int b_getpixel __PROTO((unsigned int x, unsigned int y));
void b_line __PROTO((unsigned int x1, unsigned int y1, unsigned int x2, unsigned int y2));
void b_setmaskpixel __PROTO((unsigned int x, unsigned int y, unsigned int value));
/* void b_putc __PROTO((unsigned int x, unsigned int y, char c, unsigned int angle)); */
--- term/png.trm.ORIG Tue Oct 19 14:31:28 1999
+++ term/png.trm Thu Dec 2 20:42:20 1999
@@ -1,5 +1,5 @@
/*
- * $Id: png.trm,v 1.11.2.5 1999/10/19 13:31:28 lhecking Exp $
+ * $Id: png.trm,v 1.11.2.8 1999/11/30 15:08:44 lhecking Exp $
*
*/
@@ -42,8 +42,11 @@
* png
*
* AUTHORS
- * Alexander Lehmann original code,
- * derived from pbm.trm by Russell Lang.
+ * Alexander Lehmann
+ * derived from pbm.trm by Russell Lang
+ *
+ * Eric S. Raymond update for pnglib-1.0.3; transparency.
+ * H.-B. Broeker fixes to Eric's changes
*
* send your comments or suggestions to (info-gnuplot@dartmouth.edu).
*
@@ -100,56 +103,97 @@
static int png_font = 1; /* small font */
static int png_mode = 0; /* 0:monochrome 1:gray 2:color */
+static int png_transparent = 0; /* generate transparent first color */
/* 7=black, 0=white */
static int png_gray[] = { 7, 1, 6, 5, 4, 3, 2, 1, 7 }; /* grays */
-/* bit3=!intensify, bit2=!red, bit1=!green, bit0=!blue */
-static int png_color_table[] ={ 15, 8, 3, 5, 6, 4, 2, 1, 11, 13, 14 }; /* colors */
-static png_color png_palette[16];
+static png_color png_palette[WEB_N_COLORS];
TERM_PUBLIC void
PNG_options()
{
- png_font = 1; /* small */
- png_mode = 0;
+ unsigned short rgb_color[3];
+ int n_colors = 0;
+ char *string;
+ int i;
+
+ rgb_color[0] = 0;
+ rgb_color[1] = 0;
+ rgb_color[2] = 0;
+
+ png_font = 1; /* small */
+ png_mode = 2; /* color */
+ png_transparent = 0; /* use opaque image background */
term_options[0] = NUL;
while (!END_OF_COMMAND) {
- if (almost_equals(c_token, "s$mall"))
- png_font = 1;
- else if (almost_equals(c_token, "me$dium"))
- png_font = 2;
- else if (almost_equals(c_token, "l$arge"))
- png_font = 3;
- else if (almost_equals(c_token, "mo$nochrome"))
- png_mode = 0;
- else if (almost_equals(c_token, "g$ray"))
- png_mode = 1;
- else if (almost_equals(c_token, "c$olor")
- || almost_equals(c_token, "c$olour"))
- png_mode = 2;
- else {
- /* reset to default, since term is already set */
- png_font = 1;
- png_mode = 0;
- int_error("expecting: {small, medium, large}, or {monochrome, gray, color}", c_token);
- }
- c_token++;
+ if (almost_equals(c_token, "s$mall"))
+ png_font = 1;
+ else if (almost_equals(c_token, "me$dium"))
+ png_font = 2;
+ else if (almost_equals(c_token, "l$arge"))
+ png_font = 3;
+ else if (almost_equals(c_token, "mo$nochrome"))
+ png_mode = 0;
+ else if (almost_equals(c_token, "g$ray"))
+ png_mode = 1;
+ else if (almost_equals(c_token, "c$olor")
+ || almost_equals(c_token, "c$olour"))
+ png_mode = 2;
+ else if (almost_equals(c_token, "t$ransparent"))
+ png_transparent = 1;
+ else if (almost_equals(c_token, "not$ransparent"))
+ png_transparent = 0;
+ else {
+ /* set color */
+ string = input_line + token[c_token].start_index;
+
+ if (string[0] == 'x') {
+ /* HBB 991123: read in as *shorts*, not ints! */
+ if (sscanf(string, "x%2hx%2hx%2hx", &rgb_color[0], &rgb_color[1], &rgb_color[2] ) != 3) {
+ int_error("invalid color spec, must be xRRGGBB", c_token);
+ }
+ } else
+ int_error("expecting: {small, medium, large},[no]transparent, or {monochrome, gray, color, [xRRGGBB] }", c_token);
+
+ if (n_colors >= WEB_N_COLORS) {
+ int_warn("too many colors, ingoring", c_token);
+ /* Magic number abuse guards against
+ * "> WEB_N_COLORS warning" scroll fests. */
+ if (!END_OF_COMMAND) {
+ while (!END_OF_COMMAND)
+ ++c_token; --c_token;
+ }
+ } else {
+ web_color_rgbs[n_colors].r = rgb_color[0];
+ web_color_rgbs[n_colors].g = rgb_color[1];
+ web_color_rgbs[n_colors].b = rgb_color[2];
+ n_colors++;
+ }
+ }
+ c_token++;
}
/* setup options string */
+ /* HBB 991008: moved this block to here, so 'transparent' gets
+ * printed out first. Don't print 'notransparent', for now, to
+ * protect older gnuplots. Scripts with 'transparent' in them
+ * won't work as wanted, with older versions, so put it here. */
+ if (png_transparent)
+ strcat(term_options, "transparent");
+
switch (png_font) {
case 3:
- strcat(term_options, "large");
+ strcat(term_options, " large");
break;
case 2:
- strcat(term_options, "medium");
+ strcat(term_options, " medium");
break;
case 1:
default:
- strcat(term_options, "small");
+ strcat(term_options, " small");
break;
}
@@ -166,6 +210,13 @@
break;
}
+ for (i=0; i < n_colors ; i++ ) {
+ sprintf(term_options,"%s x%02x%02x%02x",
+ term_options,
+ web_color_rgbs[i].r,
+ web_color_rgbs[i].g,
+ web_color_rgbs[i].b);
+ }
}
@@ -222,7 +273,7 @@
switch (png_mode) {
case 2:
- numplanes = 4;
+ numplanes = 8;
break;
case 1:
numplanes = 3;
@@ -248,15 +299,15 @@
TERM_PUBLIC void
PNG_text()
{
- register int x, j, row;
png_structp png_ptr;
png_infop info_ptr;
- register int i, value;
png_bytep prow;
- int mask, plane1, plane2, plane3, plane4;
- int red, green, blue;
png_text pngtext, *pngtext_copy;
+ png_byte pal_trans[1];
char text[100];
+ register int x, i, j;
+/* register int row, value; */
+/* int mask, plane1, plane2, plane3, plane4; */
png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, NULL, NULL, NULL);
if (!png_ptr) {
@@ -275,6 +326,7 @@
b_freebitmap();
return;
}
+ memset(prow,0,sizeof(prow));
if (setjmp(png_ptr->jmpbuf)) {
png_destroy_write_struct(&png_ptr, &info_ptr);
free(prow);
@@ -283,7 +335,7 @@
}
#ifdef __OLD_PNGLIB__
- /* deprecated and no longer necessary */
+ /* deprecated and no longer necessary */
png_info_init(info_ptr);
png_write_init(png_ptr); */
#endif /* __OLD_PNGLIB__ */
@@ -293,43 +345,48 @@
info_ptr->width = b_ysize;
info_ptr->height = b_xsize;
- info_ptr->bit_depth = png_mode == 0 ? 1 : 4;
+ info_ptr->bit_depth = png_mode == 0 ? 1 : 8;
info_ptr->color_type = png_mode == 2 ? PNG_COLOR_TYPE_PALETTE :
PNG_COLOR_TYPE_GRAY;
if (png_mode == 2) {
info_ptr->valid |= PNG_INFO_PLTE;
info_ptr->palette = png_palette;
- info_ptr->num_palette = 16;
+ info_ptr->num_palette = sizeof(png_palette)/sizeof(png_palette[0]);
}
if (png_mode != 0) {
info_ptr->valid |= PNG_INFO_sBIT;
if (png_mode == 1) {
info_ptr->sig_bit.gray = 3;
png_set_shift(png_ptr, &(info_ptr->sig_bit));
- } else {
- info_ptr->sig_bit.red = 2;
- info_ptr->sig_bit.green = 2;
- info_ptr->sig_bit.blue = 2;
+ }
+ else {
+ /* HBB 991123: we're now using the full 8 bits per color
+ * component... */
+ info_ptr->sig_bit.red = 8;
+ info_ptr->sig_bit.green = 8;
+ info_ptr->sig_bit.blue = 8;
}
}
+
info_ptr->interlace_type = 0;
+
if (png_mode == 0)
png_set_invert_mono(png_ptr);
- if (png_mode == 2)
- for (i = 0; i < 16; i++) {
- red = (i & 4) ? 1 : 3;
- green = (i & 2) ? 1 : 3;
- blue = (i & 1) ? 1 : 3;
- if (i & 8) {
- red--;
- green--;
- blue--;
- }
- png_palette[i].red = red * 85;
- png_palette[i].green = green * 85;
- png_palette[i].blue = blue * 85;
+ if (png_mode == 2) {
+ if (png_transparent) {
+ info_ptr->valid |= PNG_INFO_tRNS;
+ info_ptr->num_trans = 1;
+ pal_trans[0] = 0;
+ info_ptr->trans=pal_trans;
}
+
+ for (i = 0; i < WEB_N_COLORS; i++) {
+ png_palette[i].red = web_color_rgbs[i].r;
+ png_palette[i].green = web_color_rgbs[i].g;
+ png_palette[i].blue = web_color_rgbs[i].b;
+ }
+ }
sprintf(text, "gnuplot %sversion %s patchlevel %s",
OS, version, patchlevel);
@@ -339,6 +396,13 @@
pngtext.text_length = strlen(text);
pngtext_copy = malloc(sizeof(*pngtext_copy));
+ if (!pngtext_copy) {
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+ free(prow);
+ b_freebitmap();
+ return;
+ }
+ memset(pngtext_copy,0,sizeof(pngtext_copy));
*pngtext_copy = pngtext;
info_ptr->num_text = 1;
info_ptr->text = pngtext_copy;
@@ -353,6 +417,7 @@
/* dump bitmap in raster mode */
for (x = b_xsize - 1; x >= 0; x--) {
+#if 0
row = (b_ysize / 8) - 1;
for (j = row; j >= 0; j--) {
mask = 0x80;
@@ -382,10 +447,14 @@
if (png_mode == 1)
value = 7 - value;
- prow[(row - j) * 8 + i] = (png_byte) value;
+ prow[(row - j) * 8 + i] = (png_byte) (value & 0xFF) ;
mask >>= 1;
}
}
+#else
+ for (j=b_ysize - 1; j>= 0; j--)
+ prow[j] = (png_byte)b_getpixel(j, x);
+#endif
png_write_rows(png_ptr, &prow, 1);
}
@@ -395,16 +464,42 @@
b_freebitmap();
}
-
+/* _linetype(lt) Called to set the line type before text is displayed or
+ * line(s) plotted. This procedure should select a pen color or line
+ * style if the device has these capabilities.
+ * lt is an integer from -2 to 0 or greater.
+ * An lt of -2 is used for the border of the plot.
+ * An lt of -1 is used for the X and Y axes.
+ * lt 0 and upwards are used for plots 0 and upwards.
+ * If _linetype() is called with lt greater than the available line types,
+ * it should map it to one of the available line types.
+ * Most drivers provide 9 different linetypes (lt is 0 to 8).
+ */
TERM_PUBLIC void
PNG_linetype(linetype)
int linetype;
{
switch (png_mode) {
+ /* HBB 991008: this once made the grid lines and axes (-1) look the
+ * same as the borders (-2). That's ugly, IMHO. GIF uses a
+ * dashed line, for this, but libpng doesn't seem able to do
+ * that. But a look into the palette turns up that color 2
+ * is grey, and is currently unused... Let's see: */
case 2:
- if (linetype >= 9)
- linetype %= 9;
- b_setvalue(png_color_table[linetype + 2]);
+
+ if (linetype == -2)
+ linetype = 1;
+ else if (linetype == -1)
+ linetype = 2;
+
+ else {
+ /* HBB 991008: moved the += 3 down, so colors 0, 1, 2 are
+ * _not_ used by the regular plots, as it should be */
+ if (linetype >= (WEB_N_COLORS - 3))
+ linetype %= (WEB_N_COLORS - 3);
+ linetype += 3;
+ }
+ b_setvalue(linetype);
break;
case 1:
if (linetype >= 7)
@@ -462,13 +557,26 @@
"?png",
" The `png` terminal driver supports Portable Network Graphics. To compile it,",
" you will need the third-party libraries \"libpng\" and \"zlib\"; both are",
-" available at ftp://ftp.uu.net/graphics/png. `png` has two options.",
+" available at http://www.cdrom.com/pub/png/. `png` has four options.",
+"",
+" By default, the `png` terminal driver uses a shared Web-friendy palette.",
"",
" Syntax:",
" set terminal png {small | medium | large}",
+" {transparent | notransparent}",
" {monochrome | gray | color}",
+" {<color0> <color1> <color2> ...}",
+"",
+" `transparent` instructs the driver to generate transparent PNGs. The first",
+" color will be the transparent one.",
+"",
+" The defaults are small (fontsize) and color. Default size of the output",
+" is 640*480 pixel. ",
"",
-" The defaults are small (fontsize) and monochrome. Default size of the output",
-" is 640*480 pixel."
+" Each color must be of the form 'xrrggbb', where x is the literal character",
+" 'x' and 'rrggbb' are the red, green and blue components in hex. For example,",
+" 'x00ff00' is green. The background color is set first, then the border",
+" colors, then the X & Y axis colors, then the plotting colors. The maximum",
+" number of colors that can be set is currently 99."
END_HELP(png)
#endif /* TERM_HELP */
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