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added a few comments to aid in image generation.

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git-svn-id: http://svn.osgeo.org/postgis/trunk@4477 b70326c6-7e19-0410-871a-916f4a2858ee
This commit is contained in:
Kevin Neufeld 2009-09-11 03:19:19 +00:00
parent 03ee213da0
commit ed8f588b51
2 changed files with 17 additions and 6 deletions
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21
doc/html/image_src/generator.c
View file

@ -22,8 +22,10 @@
* The goal of this application is to dynamically generate all the spatial
* pictures used in PostGIS's documentation pages.
*
* Note: the coordinates of the supplied geometries should be within the x-y range
* of 200, otherwise they will appear outside of the generated image.
* Note: the coordinates of the supplied geometries should be within and scaled
* to the x-y range of [0,200], otherwise the rendered geometries may be
* rendered outside of the generated image's extents, or may be rendered too
* small to be recognizable as anything other than a single point.
*
**********************************************************************/
@ -106,6 +108,9 @@ drawPoint(char *output, LWPOINT *lwp, LAYERSTYLE *styles)
POINTARRAY *pa = lwp->point;
POINT2D p;
getPoint2d_p(pa, 0, &p);
LWDEBUGF(4, "%s", "drawPoint called");
LWDEBUGF( 4, "point = %s", lwgeom_to_ewkt((LWGEOM*)lwp,0) );
sprintf(x, "%f", p.x);
trim_trailing_zeros(x);
@ -135,6 +140,9 @@ drawLineString(char *output, LWLINE *lwl, LAYERSTYLE *style)
{
char *ptr = output;
LWDEBUGF(4, "%s", "drawLineString called");
LWDEBUGF( 4, "line = %s", lwgeom_to_ewkt((LWGEOM*)lwl,0) );
ptr += sprintf(ptr, "-fill none -stroke %s -strokewidth %d ", style->lineColor, style->lineWidth);
ptr += sprintf(ptr, "-draw \"stroke-linecap round stroke-linejoin round path 'M ");
ptr += pointarrayToString(ptr, lwl->points );
@ -158,6 +166,9 @@ drawPolygon(char *output, LWPOLY *lwp, LAYERSTYLE *style)
char *ptr = output;
int i;
LWDEBUGF(4, "%s", "drawPolygon called");
LWDEBUGF( 4, "poly = %s", lwgeom_to_ewkt((LWGEOM*)lwp,0) );
ptr += sprintf(ptr, "-fill %s -stroke %s -strokewidth %d ", style->polygonFillColor, style->polygonStrokeColor, style->polygonStrokeWidth );
ptr += sprintf(ptr, "-draw \"path '");
for (i=0; i<lwp->nrings; i++)
@ -227,8 +238,8 @@ addDropShadow(int layerNumber)
str,
"convert tmp%d.png -gravity center \\( +clone -background navy -shadow 100x3+4+4 \\) +swap -background none -flatten tmp%d.png",
layerNumber, layerNumber);
system(str);
LWDEBUGF(4, "%s", str);
system(str);
}
/**
@ -246,8 +257,8 @@ addHighlight(int layerNumber)
str,
"convert tmp%d.png \\( +clone -channel A -separate +channel -negate -background black -virtual-pixel background -blur 0x3 -shade 120x55 -contrast-stretch 0%% +sigmoidal-contrast 7x50%% -fill grey50 -colorize 10%% +clone +swap -compose overlay -composite \\) -compose In -composite tmp%d.png",
layerNumber, layerNumber);
system(str);
LWDEBUGF(4, "%s", str);
system(str);
}
/**
@ -262,8 +273,8 @@ optimizeImage(char* filename)
char *str;
str = malloc( (18 + (2*strlen(filename)) + 1) * sizeof(char) );
sprintf(str, "convert %s -depth 8 %s", filename, filename);
system(str);
LWDEBUGF(4, "%s", str);
system(str);
free(str);
}

2
doc/html/image_src/styles.c
View file

@ -31,7 +31,7 @@ getStyles( LAYERSTYLE **headRef )
if ((pFile = fopen("styles.conf", "r")) == NULL)
{
perror ( "styles.properties: No such file or directory" );
perror ( "styles.conf: No such file or directory" );
return;
}