/
maprendering.c
executable file
·1165 lines (1069 loc) · 40.9 KB
/
maprendering.c
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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: Rendering utility functions
* Author: Thomas Bonfort and the MapServer team.
*
******************************************************************************
* Copyright (c) 1996-2011 Regents of the University of Minnesota.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies of this Software or works derived from this Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*****************************************************************************/
#include <assert.h>
#include "mapserver.h"
#include "mapcopy.h"
#include "fontcache.h"
void computeSymbolStyle(symbolStyleObj *s, styleObj *src, symbolObj *symbol, double scalefactor,
double resolutionfactor)
{
double default_size;
double target_size;
double style_size;
default_size = msSymbolGetDefaultSize(symbol);
style_size = (src->size==-1)?default_size:src->size;
INIT_SYMBOL_STYLE(*s);
if(symbol->type == MS_SYMBOL_PIXMAP) {
s->color = s->outlinecolor = NULL;
} else if(symbol->filled || symbol->type == MS_SYMBOL_TRUETYPE) {
if(MS_VALID_COLOR(src->color))
s->color = &src->color;
if(MS_VALID_COLOR(src->outlinecolor))
s->outlinecolor = &src->outlinecolor;
} else {
if(MS_VALID_COLOR(src->color))
s->outlinecolor = &(src->color);
else if(MS_VALID_COLOR(src->outlinecolor))
s->outlinecolor = &(src->outlinecolor);
s->color = NULL;
}
target_size = style_size * scalefactor;
target_size = MS_MAX(target_size, src->minsize*resolutionfactor);
target_size = MS_MIN(target_size, src->maxsize*resolutionfactor);
s->scale = target_size / default_size;
s->gap = src->gap * target_size / style_size;
if(s->outlinecolor) {
s->outlinewidth = src->width * scalefactor;
s->outlinewidth = MS_MAX(s->outlinewidth, src->minwidth*resolutionfactor);
s->outlinewidth = MS_MIN(s->outlinewidth, src->maxwidth*resolutionfactor);
} else {
s->outlinewidth = 0;
}
s->rotation = src->angle * MS_DEG_TO_RAD;
}
#define COMPARE_COLORS(a,b) (\
((a).red==(b).red) && \
((a).green==(b).green) && \
((a).blue==(b).blue) && \
((a).alpha==(b).alpha))
tileCacheObj *searchTileCache(imageObj *img, symbolObj *symbol, symbolStyleObj *s, int width, int height)
{
tileCacheObj *cur = img->tilecache;
while(cur != NULL) {
if( cur->width == width
&& cur->height == height
&& cur->symbol == symbol
&& cur->outlinewidth == s->outlinewidth
&& cur->rotation == s->rotation
&& cur->scale == s->scale
&& (!s->color || COMPARE_COLORS(cur->color,*s->color))
&& (!s->backgroundcolor || COMPARE_COLORS(cur->backgroundcolor,*s->backgroundcolor))
&& (!s->outlinecolor || COMPARE_COLORS(cur->outlinecolor,*s->outlinecolor)))
return cur;
cur = cur->next;
}
return NULL;
}
int preloadSymbol(symbolSetObj *symbolset, symbolObj *symbol, rendererVTableObj *renderer) {
(void)symbolset;
switch(symbol->type) {
case MS_SYMBOL_VECTOR:
case MS_SYMBOL_ELLIPSE:
case MS_SYMBOL_SIMPLE:
case (MS_SYMBOL_TRUETYPE):
break;
case (MS_SYMBOL_SVG):
#if defined(USE_SVG_CAIRO) || defined(USE_RSVG)
return msPreloadSVGSymbol(symbol);
#else
msSetError(MS_SYMERR, "SVG symbol support is not enabled.", "preloadSymbol()");
return MS_FAILURE;
#endif
break;
case (MS_SYMBOL_PIXMAP): {
if(!symbol->pixmap_buffer) {
if(MS_SUCCESS != msPreloadImageSymbol(renderer,symbol))
return MS_FAILURE;
}
}
break;
default:
msSetError(MS_MISCERR,"unsupported symbol type %d", "preloadSymbol()", symbol->type);
return MS_FAILURE;
}
return MS_SUCCESS;
}
/* add a cached tile to the current image's cache */
tileCacheObj *addTileCache(imageObj *img,
imageObj *tile, symbolObj *symbol, symbolStyleObj *style, int width, int height)
{
tileCacheObj *cachep;
if(img->ntiles >= MS_IMAGECACHESIZE) { /* remove last element, size stays the same */
cachep = img->tilecache;
/*go to the before last cache object*/
while(cachep->next && cachep->next->next) cachep = cachep->next;
assert( cachep->next );
/*free the last tile's data*/
msFreeImage(cachep->next->image);
/*reuse the last tile object*/
/* make the cache point to the start of the list*/
cachep->next->next = img->tilecache;
/* point the global cache to the new first */
img->tilecache = cachep->next;
/* the before last cache is now last, so it has no successor*/
cachep->next = NULL;
} else {
img->ntiles += 1;
cachep = (tileCacheObj*)malloc(sizeof(tileCacheObj));
MS_CHECK_ALLOC(cachep, sizeof(tileCacheObj), NULL);
cachep->next = img->tilecache;
img->tilecache = cachep;
}
cachep = img->tilecache;
cachep->image = tile;
cachep->outlinewidth = style->outlinewidth;
cachep->scale = style->scale;
cachep->rotation = style->rotation;
if(style->color) MS_COPYCOLOR(&cachep->color,style->color);
if(style->outlinecolor) MS_COPYCOLOR(&cachep->outlinecolor,style->outlinecolor);
cachep->width = width;
cachep->height = height;
cachep->symbol = symbol;
return(cachep);
}
/* helper function to center glyph on the desired point */
static int drawGlyphMarker(imageObj *img, face_element *face, glyph_element *glyphc, double px, double py, int size, double rotation,
colorObj *clr, colorObj *oclr, int olwidth)
{
double ox, oy;
textPathObj path;
glyphObj glyph;
rendererVTableObj *renderer = img->format->vtable;
if(!renderer->renderGlyphs) return MS_FAILURE;
path.numglyphs = 1;
glyph.glyph = glyphc;
glyph.face = face;
path.glyphs = &glyph;
path.glyph_size = size;
glyph.rot = rotation;
ox = (glyphc->metrics.maxx + glyphc->metrics.minx) / 2.0;
oy = (glyphc->metrics.maxy + glyphc->metrics.miny) / 2.0;
if(rotation != 0) {
double sina, cosa;
double rox,roy;
sina = sin(rotation);
cosa = cos(rotation);
rox = ox * cosa - oy * sina;
roy = ox * sina + oy * cosa;
px -= rox;
py += roy;
glyph.pnt.x = px;
glyph.pnt.y = py;
} else {
glyph.pnt.x = px - ox;
glyph.pnt.y = py + oy;
}
textSymbolObj ts;
memset(&ts, 0, sizeof(ts));
ts.textpath = &path;
return renderer->renderGlyphs(img, &ts, clr, oclr, olwidth, MS_TRUE);
}
imageObj *getTile(imageObj *img, symbolObj *symbol, symbolStyleObj *s, int width, int height,
int seamlessmode)
{
tileCacheObj *tile;
int status = MS_SUCCESS;
rendererVTableObj *renderer = img->format->vtable;
if(width==-1 || height == -1) {
width=height=MS_MAX(symbol->sizex,symbol->sizey);
}
tile = searchTileCache(img,symbol,s,width,height);
if(tile==NULL) {
imageObj *tileimg;
double p_x,p_y;
tileimg = msImageCreate(width,height,img->format,NULL,NULL,img->resolution, img->resolution, NULL);
if(MS_UNLIKELY(!tileimg)) {
return NULL;
}
if(!seamlessmode) {
p_x = width/2.0;
p_y = height/2.0;
switch(symbol->type) {
case (MS_SYMBOL_TRUETYPE):
{
unsigned int unicode;
glyph_element *glyphc;
face_element *face = msGetFontFace(symbol->font, &img->map->fontset);
if(MS_UNLIKELY(!face)) { status = MS_FAILURE; break; }
msUTF8ToUniChar(symbol->character, &unicode);
unicode = msGetGlyphIndex(face,unicode);
glyphc = msGetGlyphByIndex(face, MS_MAX(MS_NINT(s->scale),1), unicode);
if(MS_UNLIKELY(!glyphc)) { status = MS_FAILURE; break; }
status = drawGlyphMarker(tileimg, face, glyphc, p_x, p_y, s->scale, s->rotation,
s->color, s->outlinecolor, s->outlinewidth);
}
break;
case (MS_SYMBOL_PIXMAP):
status = msPreloadImageSymbol(renderer,symbol);
if(MS_UNLIKELY(status == MS_FAILURE)) { break; }
status = renderer->renderPixmapSymbol(tileimg, p_x, p_y, symbol, s);
break;
case (MS_SYMBOL_ELLIPSE):
status = renderer->renderEllipseSymbol(tileimg, p_x, p_y,symbol, s);
break;
case (MS_SYMBOL_VECTOR):
status = renderer->renderVectorSymbol(tileimg, p_x, p_y, symbol, s);
break;
case (MS_SYMBOL_SVG):
#if defined(USE_SVG_CAIRO) || defined(USE_RSVG)
status = msPreloadSVGSymbol(symbol);
if(MS_LIKELY(status == MS_SUCCESS)) {
if (renderer->supports_svg) {
status = renderer->renderSVGSymbol(tileimg, p_x, p_y, symbol, s);
} else {
status = msRenderRasterizedSVGSymbol(tileimg,p_x,p_y,symbol, s);
}
}
#else
msSetError(MS_SYMERR, "SVG symbol support is not enabled.", "getTile()");
status = MS_FAILURE;
#endif
break;
default:
msSetError(MS_SYMERR, "Unknown symbol type %d", "getTile()", symbol->type);
status = MS_FAILURE;
break;
}
if(MS_UNLIKELY(status == MS_FAILURE)) {
msFreeImage(tileimg);
return NULL;
}
} else {
/*
* in seamless mode, we render the the symbol 9 times on a 3x3 grid to account for
* antialiasing blending from one tile to the next. We finally keep the center tile
*/
imageObj *tile3img = msImageCreate(width*3,height*3,img->format,NULL,NULL,
img->resolution, img->resolution, NULL);
int i,j;
rasterBufferObj tmpraster;
for(i=1; i<=3; i++) {
p_x = (i+0.5)*width;
for(j=1; j<=3; j++) {
p_y = (j+0.5) * height;
switch(symbol->type) {
case (MS_SYMBOL_TRUETYPE):
{
unsigned int unicode;
glyph_element *glyphc;
face_element *face = msGetFontFace(symbol->font, &img->map->fontset);
if(MS_UNLIKELY(!face)) { status = MS_FAILURE; break; }
msUTF8ToUniChar(symbol->character, &unicode);
unicode = msGetGlyphIndex(face,unicode);
glyphc = msGetGlyphByIndex(face, MS_MAX(MS_NINT(s->scale),1), unicode);
if(MS_UNLIKELY(!glyphc)) { status = MS_FAILURE; break; }
status = drawGlyphMarker(tileimg, face, glyphc, p_x, p_y, s->scale, s->rotation,
s->color, s->outlinecolor, s->outlinewidth);
}
break;
case (MS_SYMBOL_PIXMAP):
status = msPreloadImageSymbol(renderer,symbol);
if(MS_UNLIKELY(status == MS_FAILURE)) { break; }
status = renderer->renderPixmapSymbol(tile3img, p_x, p_y, symbol, s);
break;
case (MS_SYMBOL_ELLIPSE):
status = renderer->renderEllipseSymbol(tile3img, p_x, p_y,symbol, s);
break;
case (MS_SYMBOL_VECTOR):
status = renderer->renderVectorSymbol(tile3img, p_x, p_y, symbol, s);
break;
default:
msSetError(MS_SYMERR, "BUG: Seamless mode is only for vector symbols", "getTile()");
return NULL;
}
if(MS_UNLIKELY(status == MS_FAILURE)) {
msFreeImage(tile3img);
return NULL;
}
}
}
status = MS_IMAGE_RENDERER(tile3img)->getRasterBufferHandle(tile3img,&tmpraster);
if(MS_UNLIKELY(status == MS_FAILURE)) {
msFreeImage(tile3img);
return NULL;
}
status = renderer->mergeRasterBuffer(tileimg,
&tmpraster,
1.0,width,height,0,0,width,height
);
msFreeImage(tile3img);
}
if(MS_UNLIKELY(status == MS_FAILURE)) {
msFreeImage(tileimg);
return NULL;
}
tile = addTileCache(img,tileimg,symbol,s,width,height);
}
return tile->image;
}
int msImagePolylineMarkers(imageObj *image, shapeObj *p, symbolObj *symbol,
symbolStyleObj *style, double spacing,
double initialgap, int auto_angle)
{
rendererVTableObj *renderer = MS_IMAGE_RENDERER(image);
int i,j;
pointObj point;
double original_rotation = style->rotation;
double symbol_width,symbol_height;
glyph_element *glyphc = NULL;
face_element *face = NULL;
int ret = MS_SUCCESS;
if(symbol->type != MS_SYMBOL_TRUETYPE) {
symbol_width = MS_MAX(1,symbol->sizex*style->scale);
symbol_height = MS_MAX(1,symbol->sizey*style->scale);
} else {
unsigned int unicode;
msUTF8ToUniChar(symbol->character, &unicode);
face = msGetFontFace(symbol->font, &image->map->fontset);
if(MS_UNLIKELY(!face)) return MS_FAILURE;
unicode = msGetGlyphIndex(face,unicode);
glyphc = msGetGlyphByIndex(face, MS_MAX(MS_NINT(style->scale),1), unicode);
if(MS_UNLIKELY(!glyphc)) return MS_FAILURE;
symbol_width = glyphc->metrics.maxx - glyphc->metrics.minx;
symbol_height = glyphc->metrics.maxy - glyphc->metrics.miny;
}
for(i=0; i<p->numlines; i++) {
int line_in = 0;
double line_length=0;
double current_length;
if(initialgap < 0) {
current_length = spacing/2.0; /* initial padding for each line */
} else {
current_length = initialgap; /* initial padding for each line */
}
for(j=1; j<p->line[i].numpoints; j++) {
double rx,ry,theta,length;
length = sqrt((pow((p->line[i].point[j].x - p->line[i].point[j-1].x),2) + pow((p->line[i].point[j].y - p->line[i].point[j-1].y),2)));
line_length += length;
if(length==0)continue;
rx = (p->line[i].point[j].x - p->line[i].point[j-1].x)/length;
ry = (p->line[i].point[j].y - p->line[i].point[j-1].y)/length;
if (auto_angle) {
theta = asin(ry);
if(rx < 0) {
theta += MS_PI;
} else theta = -theta;
style->rotation = original_rotation + theta;
}
while (current_length <= length) {
point.x = p->line[i].point[j - 1].x + current_length * rx;
point.y = p->line[i].point[j - 1].y + current_length * ry;
if(symbol->anchorpoint_x != 0.5 || symbol->anchorpoint_y != 0.5) {
double ox, oy;
ox = (0.5 - symbol->anchorpoint_x) * symbol_width;
oy = (0.5 - symbol->anchorpoint_y) * symbol_height;
if(style->rotation != 0) {
double sina,cosa;
double rox,roy;
sina = sin(-style->rotation);
cosa = cos(-style->rotation);
rox = ox * cosa - oy * sina;
roy = ox * sina + oy * cosa;
point.x += rox;
point.y += roy;
} else {
point.x += ox;
point.y += oy;
}
}
/* if the point is not in the map extent, skip it. (POLYLINE_NO_CLIP) */
if ( (point.x < -(symbol_width) || point.x > (image->width+symbol_width)) ||
(point.y < -(symbol_height) || point.y > (image->height+symbol_height)) ) {
current_length += spacing;
line_in=1;
continue;
}
switch (symbol->type) {
case MS_SYMBOL_PIXMAP:
ret = renderer->renderPixmapSymbol(image, point.x, point.y, symbol, style);
break;
case MS_SYMBOL_ELLIPSE:
ret = renderer->renderEllipseSymbol(image, point.x, point.y, symbol, style);
break;
case MS_SYMBOL_VECTOR:
ret = renderer->renderVectorSymbol(image, point.x, point.y, symbol, style);
break;
case MS_SYMBOL_TRUETYPE:
ret = drawGlyphMarker(image, face, glyphc, point.x, point.y, style->scale, style->rotation,
style->color, style->outlinecolor, style->outlinewidth);
break;
case (MS_SYMBOL_SVG):
#if defined(USE_SVG_CAIRO) || defined(USE_RSVG)
if (renderer->supports_svg) {
ret = renderer->renderSVGSymbol(image, point.x, point.y, symbol, style);
} else {
ret = msRenderRasterizedSVGSymbol(image,point.x,point.y,symbol, style);
}
#else
msSetError(MS_SYMERR, "SVG symbol support is not enabled.", "msImagePolylineMarkers()()");
ret = MS_FAILURE;
#endif
break;
}
if( ret != MS_SUCCESS)
return ret;
current_length += spacing;
line_in=1;
}
current_length -= length;
}
/*
* if we couldn't place a symbol on the line and no initialgap was
* specified, add one now we don't add the symbol if the line is shorter
* than the length of the symbol itself
*/
if(initialgap < 0 && !line_in && line_length>symbol_width) {
/* total lengths of beginnning and end of current segment */
double before_length=0,after_length=0;
/*optimize*/
line_length /= 2.0;
for(j=1; j<p->line[i].numpoints; j++) {
double length;
length = sqrt((pow((p->line[i].point[j].x - p->line[i].point[j-1].x),2) + pow((p->line[i].point[j].y - p->line[i].point[j-1].y),2)));
after_length += length;
if(after_length>line_length) {
double rx,ry,theta;
/* offset where the symbol should be drawn on the current
* segment */
double offset = line_length - before_length;
rx = (p->line[i].point[j].x - p->line[i].point[j-1].x)/length;
ry = (p->line[i].point[j].y - p->line[i].point[j-1].y)/length;
if (auto_angle) {
theta = asin(ry);
if(rx < 0) {
theta += MS_PI;
} else theta = -theta;
style->rotation = original_rotation + theta;
}
point.x = p->line[i].point[j - 1].x + offset * rx;
point.y = p->line[i].point[j - 1].y + offset * ry;
switch (symbol->type) {
case MS_SYMBOL_PIXMAP:
ret = renderer->renderPixmapSymbol(image, point.x, point.y, symbol, style);
break;
case MS_SYMBOL_ELLIPSE:
ret = renderer->renderEllipseSymbol(image, point.x, point.y, symbol, style);
break;
case MS_SYMBOL_VECTOR:
ret = renderer->renderVectorSymbol(image, point.x, point.y, symbol, style);
break;
case MS_SYMBOL_TRUETYPE:
ret = drawGlyphMarker(image, face, glyphc, point.x, point.y, style->scale, style->rotation,
style->color, style->outlinecolor, style->outlinewidth);
break;
case (MS_SYMBOL_SVG):
#if defined(USE_SVG_CAIRO) || defined(USE_RSVG)
if (renderer->supports_svg) {
ret = renderer->renderSVGSymbol(image, point.x, point.y, symbol, style);
} else {
ret = msRenderRasterizedSVGSymbol(image,point.x,point.y,symbol, style);
}
#else
msSetError(MS_SYMERR, "SVG symbol support is not enabled.", "msImagePolylineMarkers()()");
ret = MS_FAILURE;
#endif
break;
}
break; /* we have rendered the single marker for this line */
}
before_length += length;
}
}
}
return ret;
}
int msDrawLineSymbol(mapObj *map, imageObj *image, shapeObj *p,
styleObj *style, double scalefactor)
{
int status = MS_SUCCESS;
if (image) {
if (MS_RENDERER_PLUGIN(image->format)) {
rendererVTableObj *renderer = image->format->vtable;
symbolObj *symbol;
shapeObj *offsetLine = p;
int i;
double width;
double finalscalefactor;
if (p->numlines == 0)
return MS_SUCCESS;
if (style->symbol >= map->symbolset.numsymbols || style->symbol < 0)
return MS_SUCCESS; /* no such symbol, 0 is OK */
symbol = map->symbolset.symbol[style->symbol];
/* store a reference to the renderer to be used for freeing */
symbol->renderer = renderer;
width = style->width * scalefactor;
width = MS_MIN(width,style->maxwidth*image->resolutionfactor);
width = MS_MAX(width,style->minwidth*image->resolutionfactor);
if(style->width != 0) {
finalscalefactor = width / style->width;
} else {
finalscalefactor = 1.0;
}
if(style->offsety==MS_STYLE_SINGLE_SIDED_OFFSET) {
offsetLine = msOffsetPolyline(p,style->offsetx * finalscalefactor ,MS_STYLE_SINGLE_SIDED_OFFSET);
} else if(style->offsety==MS_STYLE_DOUBLE_SIDED_OFFSET) {
offsetLine = msOffsetPolyline(p,style->offsetx * finalscalefactor ,MS_STYLE_DOUBLE_SIDED_OFFSET);
} else if(style->offsetx!=0 || style->offsety!=0) {
offsetLine = msOffsetPolyline(p, style->offsetx * finalscalefactor,
style->offsety * finalscalefactor);
}
if(style->symbol == 0 || (symbol->type==MS_SYMBOL_SIMPLE)) {
strokeStyleObj s;
s.linecap = style->linecap;
s.linejoin = style->linejoin;
s.linejoinmaxsize = style->linejoinmaxsize;
s.antialiased = style->antialiased;
s.width = width;
s.patternlength = style->patternlength;
for(i=0; i<s.patternlength; i++)
s.pattern[i] = style->pattern[i] * finalscalefactor;
s.patternoffset = (style->initialgap<=0) ? 0 : (style->initialgap * finalscalefactor);
if(MS_VALID_COLOR(style->color))
s.color = &style->color;
else if(MS_VALID_COLOR(style->outlinecolor))
s.color = &style->outlinecolor;
else {
/* msSetError(MS_MISCERR,"no color defined for line styling","msDrawLineSymbol()");
* not really an error */
status = MS_SUCCESS;
goto line_cleanup;
}
status = renderer->renderLine(image,offsetLine,&s);
} else {
symbolStyleObj s;
if(preloadSymbol(&map->symbolset, symbol, renderer) != MS_SUCCESS) {
status = MS_FAILURE;
goto line_cleanup;
}
INIT_SYMBOL_STYLE(s);
computeSymbolStyle(&s,style,symbol,scalefactor,image->resolutionfactor);
s.style = style;
/* compute a markerStyle and use it on the line */
if(style->gap<0) {
/* special function that treats any other symbol used as a marker, not a brush */
status = msImagePolylineMarkers(image,offsetLine,symbol,&s,-s.gap,
style->initialgap * finalscalefactor, 1);
} else if(style->gap>0) {
status = msImagePolylineMarkers(image,offsetLine,symbol,&s,s.gap,
style->initialgap * finalscalefactor,0);
} else {
if(renderer->renderLineTiled != NULL) {
int pw,ph;
imageObj* tile=NULL;
if(s.scale != 1) {
pw = MS_NINT(symbol->sizex * s.scale);
ph = MS_NINT(symbol->sizey * s.scale);
} else {
pw = symbol->sizex;
ph = symbol->sizey;
}
if(pw<1) pw=1;
if(ph<1) ph=1;
tile = getTile(image, symbol,&s,pw,ph,0);
status = renderer->renderLineTiled(image, offsetLine, tile);
} else {
msSetError(MS_RENDERERERR, "renderer does not support brushed lines", "msDrawLineSymbol()");
status = MS_FAILURE;
}
}
}
line_cleanup:
if(offsetLine!=p) {
msFreeShape(offsetLine);
msFree(offsetLine);
}
return status;
} else if( MS_RENDERER_IMAGEMAP(image->format) )
msDrawLineSymbolIM(map, image, p, style, scalefactor);
else {
msSetError(MS_RENDERERERR, "unsupported renderer", "msDrawShadeSymbol()");
status = MS_FAILURE;
}
} else {
status = MS_FAILURE;
}
return status;
}
int msDrawShadeSymbol(mapObj *map, imageObj *image, shapeObj *p, styleObj *style, double scalefactor)
{
int ret = MS_SUCCESS;
symbolObj *symbol;
if (!p)
return MS_SUCCESS;
if (p->numlines <= 0)
return MS_SUCCESS;
if (style->symbol >= map->symbolset.numsymbols || style->symbol < 0)
return MS_SUCCESS; /* no such symbol, 0 is OK */
symbol = map->symbolset.symbol[style->symbol];
/*
* if only an outlinecolor was defined, and not a color,
* switch to the line drawing function
*
* this behavior is kind of a mapfile hack, and must be
* kept for backwards compatibility
*/
if (symbol->type != MS_SYMBOL_PIXMAP && symbol->type != MS_SYMBOL_SVG ) {
if (!MS_VALID_COLOR(style->color)) {
if(MS_VALID_COLOR(style->outlinecolor))
return msDrawLineSymbol(map, image, p, style, scalefactor);
else {
/* just do nothing if no color has been set */
return MS_SUCCESS;
}
}
}
if (image) {
if (MS_RENDERER_PLUGIN(image->format)) {
rendererVTableObj *renderer = image->format->vtable;
shapeObj *offsetPolygon = NULL;
/* store a reference to the renderer to be used for freeing */
if(style->symbol)
symbol->renderer = renderer;
if (style->offsetx != 0 || style->offsety != 0) {
if(style->offsety==MS_STYLE_SINGLE_SIDED_OFFSET) {
offsetPolygon = msOffsetPolyline(p, style->offsetx*scalefactor, MS_STYLE_SINGLE_SIDED_OFFSET);
} else if(style->offsety==MS_STYLE_DOUBLE_SIDED_OFFSET) {
offsetPolygon = msOffsetPolyline(p,style->offsetx * scalefactor ,MS_STYLE_DOUBLE_SIDED_OFFSET);
} else {
offsetPolygon = msOffsetPolyline(p, style->offsetx*scalefactor,style->offsety*scalefactor);
}
} else {
offsetPolygon=p;
}
/* simple polygon drawing, without any specific symbol.
* also draws an optional outline */
if(style->symbol == 0 || symbol->type == MS_SYMBOL_SIMPLE) {
ret = renderer->renderPolygon(image,offsetPolygon,&style->color);
if(ret != MS_SUCCESS) goto cleanup;
if(MS_VALID_COLOR(style->outlinecolor)) {
strokeStyleObj s;
INIT_STROKE_STYLE(s);
s.color = &style->outlinecolor;
s.color->alpha = style->color.alpha;
s.width = (style->width == 0)?scalefactor:style->width*scalefactor;
s.width = MS_MIN(s.width, style->maxwidth);
s.width = MS_MAX(s.width, style->minwidth);
ret = renderer->renderLine(image,offsetPolygon,&s);
}
goto cleanup; /*finished plain polygon*/
} else if(symbol->type == MS_SYMBOL_HATCH) {
double width, spacing;
double pattern[MS_MAXPATTERNLENGTH];
int i;
width = (style->width <= 0)?scalefactor:style->width*scalefactor;
width = MS_MIN(width, style->maxwidth*image->resolutionfactor);
width = MS_MAX(width, style->minwidth*image->resolutionfactor);
spacing = (style->size <= 0)?scalefactor:style->size*scalefactor;
spacing = MS_MIN(spacing, style->maxsize*image->resolutionfactor);
spacing = MS_MAX(spacing, style->minsize*image->resolutionfactor);
/* scale the pattern by the factor applied to the width */
for(i=0; i<style->patternlength; i++) {
pattern[i] = style->pattern[i]*width/style->width;
}
ret = msHatchPolygon(image,offsetPolygon,spacing,width,pattern,style->patternlength,style->angle, &style->color);
goto cleanup;
} else {
symbolStyleObj s;
int pw,ph;
imageObj *tile;
int seamless = 0;
if(preloadSymbol(&map->symbolset,symbol,renderer) != MS_SUCCESS) {
ret = MS_FAILURE;
goto cleanup;
}
INIT_SYMBOL_STYLE(s);
computeSymbolStyle(&s,style,symbol,scalefactor,image->resolutionfactor);
s.style = style;
if (!s.color && !s.outlinecolor && symbol->type != MS_SYMBOL_PIXMAP && symbol->type != MS_SYMBOL_SVG) {
ret = MS_SUCCESS; /* nothing to do (colors are required except for PIXMAP symbols */
goto cleanup;
}
if(s.backgroundcolor) {
ret = renderer->renderPolygon(image,offsetPolygon, s.backgroundcolor);
if(ret != MS_SUCCESS) goto cleanup;
}
if(s.scale != 1) {
if (s.gap > 0) {
pw = MS_MAX(MS_NINT(s.gap),symbol->sizex * s.scale);
ph = MS_MAX(MS_NINT(s.gap),symbol->sizey * s.scale);
} else {
pw = MS_NINT(symbol->sizex * s.scale);
ph = MS_NINT(symbol->sizey * s.scale);
}
} else {
if (s.gap > 0) {
pw = MS_MAX(s.gap,symbol->sizex);
ph = MS_MAX(s.gap,symbol->sizey);
} else {
pw = symbol->sizex;
ph = symbol->sizey;
}
}
if(pw<1) pw=1;
if(ph<1) ph=1;
/* if we're doing vector symbols with an antialiased pixel rendererer, we want to enable
* seamless mode, i.e. comute a tile that accounts for the blending of neighbouring
* tiles at the tile border
*/
if(symbol->type == MS_SYMBOL_VECTOR && style->gap == 0 &&
(image->format->renderer == MS_RENDER_WITH_AGG ||
image->format->renderer == MS_RENDER_WITH_CAIRO_RASTER)) {
seamless = 1;
}
tile = getTile(image,symbol,&s,pw,ph,seamless);
ret = renderer->renderPolygonTiled(image,offsetPolygon, tile);
}
cleanup:
if (offsetPolygon != p) {
msFreeShape(offsetPolygon);
msFree(offsetPolygon);
}
return ret;
} else if( MS_RENDERER_IMAGEMAP(image->format) )
msDrawShadeSymbolIM(map, image, p, style, scalefactor);
}
return ret;
}
int msDrawMarkerSymbol(mapObj *map, imageObj *image, pointObj *p, styleObj *style,
double scalefactor)
{
int ret = MS_SUCCESS;
if (!p)
return MS_SUCCESS;
if (style->symbol >= map->symbolset.numsymbols || style->symbol <= 0)
return MS_SUCCESS; /* no such symbol, 0 is OK */
if (image) {
if(MS_RENDERER_PLUGIN(image->format)) {
rendererVTableObj *renderer = image->format->vtable;
symbolStyleObj s;
double p_x,p_y;
symbolObj *symbol = map->symbolset.symbol[style->symbol];
/* store a reference to the renderer to be used for freeing */
symbol->renderer = renderer;
if(preloadSymbol(&map->symbolset,symbol,renderer) != MS_SUCCESS) {
return MS_FAILURE;
}
computeSymbolStyle(&s,style,symbol,scalefactor,image->resolutionfactor);
s.style = style;
if (!s.color && !s.outlinecolor && symbol->type != MS_SYMBOL_PIXMAP &&
symbol->type != MS_SYMBOL_SVG) {
return MS_SUCCESS; // nothing to do if no color, except for pixmap symbols
}
if(s.scale == 0) {
return MS_SUCCESS;
}
/* TODO: skip the drawing of the symbol if it's smaller than a pixel ?
if (s.size < 1)
return; // size too small
*/
p_x = p->x;
p_y = p->y;
if (style->polaroffsetpixel != 0 ||
style->polaroffsetangle != 0) {
double angle = style->polaroffsetangle * MS_DEG_TO_RAD;
p_x += (style->polaroffsetpixel * cos(-angle)) * scalefactor;
p_y += (style->polaroffsetpixel * sin(-angle)) * scalefactor;
}
p_x += style->offsetx * scalefactor;
p_y += style->offsety * scalefactor;
if(symbol->anchorpoint_x != 0.5 || symbol->anchorpoint_y != 0.5) {
double sx,sy;
double ox, oy;
if(MS_UNLIKELY(MS_FAILURE == msGetMarkerSize(map, style, &sx, &sy, scalefactor))) {
return MS_FAILURE;
}
ox = (0.5 - symbol->anchorpoint_x) * sx;
oy = (0.5 - symbol->anchorpoint_y) * sy;
if(s.rotation != 0) {
double sina, cosa;
double rox,roy;
sina = sin(-s.rotation);
cosa = cos(-s.rotation);
rox = ox * cosa - oy * sina;
roy = ox * sina + oy * cosa;
p_x += rox;
p_y += roy;
} else {
p_x += ox;
p_y += oy;
}
}
if(renderer->use_imagecache) {
imageObj *tile = getTile(image, symbol, &s, -1, -1,0);
if(tile!=NULL)
return renderer->renderTile(image, tile, p_x, p_y);
else {
msSetError(MS_RENDERERERR, "problem creating cached tile", "msDrawMarkerSymbol()");
return MS_FAILURE;
}
}
switch (symbol->type) {
case (MS_SYMBOL_TRUETYPE): {
unsigned int unicode;
glyph_element *glyphc;
face_element *face = msGetFontFace(symbol->font, &map->fontset);
if(MS_UNLIKELY(!face)) return MS_FAILURE;
msUTF8ToUniChar(symbol->character,&unicode);
unicode = msGetGlyphIndex(face,unicode);
glyphc = msGetGlyphByIndex(face, MS_MAX(MS_NINT(s.scale),1), unicode);
if(MS_UNLIKELY(!glyphc)) return MS_FAILURE;
ret = drawGlyphMarker(image, face, glyphc, p_x, p_y, s.scale, s.rotation, s.color, s.outlinecolor, s.outlinewidth);
}
break;
case (MS_SYMBOL_PIXMAP): {
assert(symbol->pixmap_buffer);
ret = renderer->renderPixmapSymbol(image,p_x,p_y,symbol,&s);
}
break;
case (MS_SYMBOL_ELLIPSE): {
ret = renderer->renderEllipseSymbol(image, p_x, p_y,symbol, &s);
}
break;
case (MS_SYMBOL_VECTOR): {
ret = renderer->renderVectorSymbol(image, p_x, p_y, symbol, &s);
}
break;
case (MS_SYMBOL_SVG): {
if (renderer->supports_svg) {
ret = renderer->renderSVGSymbol(image, p_x, p_y, symbol, &s);
} else {
#if defined(USE_SVG_CAIRO) || defined(USE_RSVG)
ret = msRenderRasterizedSVGSymbol(image, p_x,p_y, symbol, &s);
#else
msSetError(MS_SYMERR, "SVG symbol support is not enabled.", "msDrawMarkerSymbol()");
return MS_FAILURE;
#endif
}
}
break;
default:
break;
}
return ret;
} else if( MS_RENDERER_IMAGEMAP(image->format) )
msDrawMarkerSymbolIM(map, image, p, style, scalefactor);
}
return ret;
}
int msDrawLabelBounds(mapObj *map, imageObj *image, label_bounds *bnds, styleObj *style, double scalefactor)
{
/*
* helper function to draw label bounds, where we might have only a rectObj and not
* a lineObj/shapeObj
*/
shapeObj shape;
shape.numlines = 1;
if(bnds->poly) {
shape.line = bnds->poly;
return msDrawShadeSymbol(map,image,&shape,style,scalefactor);
} else {
pointObj pnts1[5];
lineObj l;
l.point = pnts1;
l.numpoints = 5;
pnts1[0].x = pnts1[1].x = pnts1[4].x = bnds->bbox.minx;
pnts1[2].x = pnts1[3].x = bnds->bbox.maxx;
pnts1[0].y = pnts1[3].y = pnts1[4].y = bnds->bbox.miny;
pnts1[1].y = pnts1[2].y = bnds->bbox.maxy;
(void)pnts1[0].x; (void)pnts1[0].y;
(void)pnts1[1].x; (void)pnts1[1].y;
(void)pnts1[2].x; (void)pnts1[2].y;
(void)pnts1[3].x; (void)pnts1[3].y;
(void)pnts1[4].x; (void)pnts1[4].y;
shape.line = &l; // must return from this block
return msDrawShadeSymbol(map,image,&shape,style,scalefactor);
}
}
int msDrawTextSymbol(mapObj *map, imageObj *image, pointObj labelPnt, textSymbolObj *ts)
{
(void)map;
rendererVTableObj *renderer = image->format->vtable;
colorObj *c = NULL, *oc = NULL;
int ow;
assert(ts->textpath);
if(!renderer->renderGlyphs) return MS_FAILURE;
if(!ts->textpath->absolute) {