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mapcairo.c
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/******************************************************************************
* $Id$
*
* Project: MapServer
* Purpose: Cairo Rendering functions
* Author: Thomas Bonfort
*
******************************************************************************
* Copyright (c) 1996-2009 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 "mapserver.h"
#ifdef USE_CAIRO
#include <cairo.h>
#if defined(_WIN32) && !defined(__CYGWIN__)
#include <cairo-pdf.h>
#include <cairo-svg.h>
#else
#include <cairo/cairo-pdf.h>
#include <cairo/cairo-svg.h>
#endif
#ifdef USE_SVG_CAIRO
#include <svg-cairo.h>
#else
#ifdef USE_RSVG
#include <librsvg/rsvg.h>
#ifndef LIBRSVG_CHECK_VERSION
#include <librsvg/librsvg-features.h>
#endif
#ifndef RSVG_CAIRO_H
#include <librsvg/rsvg-cairo.h>
#endif
#include <glib-object.h>
#endif
#endif
#ifdef USE_GDAL
#include <cpl_string.h>
#include <gdal.h>
#endif
# include <cairo-ft.h>
/*
#include <pango/pangocairo.h>
#include <glib.h>
*/
#include <string.h>
/*
#include <ft2build.h>
#include FT_FREETYPE_H
*/
typedef struct facecacheObj faceCacheObj;
struct facecacheObj {
cairo_font_face_t *face;
FT_Face ftface;
char *path;
faceCacheObj *next;
cairo_user_data_key_t facekey;
};
int freeFaceCache(faceCacheObj *fc)
{
/* printf("***\nface %s has %d cairo references\n***\n",fc->path,cairo_font_face_get_reference_count(fc->face)); */
cairo_font_face_destroy(fc->face);
FT_Done_Face(fc->ftface);
free(fc->path);
return MS_SUCCESS;
}
typedef struct {
faceCacheObj *facecache;
FT_Library library;
/* dummy surface and context */
unsigned char dummydata[4];
cairo_surface_t *dummysurface;
cairo_t *dummycr;
} cairoCacheData;
void initializeCache(void **vcache)
{
cairoCacheData *cache = (cairoCacheData*)malloc(sizeof(cairoCacheData));
*vcache = cache;
cache->facecache = NULL;
FT_Init_FreeType(&(cache->library));
/* dummy surface and context */
cache->dummysurface = cairo_image_surface_create_for_data(cache->dummydata, CAIRO_FORMAT_ARGB32, 1,1,4);
cache->dummycr = cairo_create(cache->dummysurface);
}
int cleanupCairo(void *cache)
{
cairoCacheData *ccache = (cairoCacheData*)cache;
if(ccache->dummycr) {
cairo_destroy(ccache->dummycr);
}
if(ccache->dummysurface) {
cairo_surface_destroy(ccache->dummysurface);
}
if(ccache->facecache) {
faceCacheObj *next,*cur;
cur = ccache->facecache;
do {
next = cur->next;
freeFaceCache(cur);
free(cur);
cur=next;
} while(cur);
}
if(ccache->library)
FT_Done_FreeType(ccache->library);
free(ccache);
return MS_SUCCESS;
}
typedef struct {
cairo_surface_t *surface;
cairo_t *cr;
bufferObj *outputStream;
int use_alpha;
} cairo_renderer;
#define CAIRO_RENDERER(im) ((cairo_renderer*)(im->img.plugin))
int freeImageCairo(imageObj *img)
{
cairo_renderer *r = CAIRO_RENDERER(img);
if(r) {
cairo_destroy(r->cr);
cairo_surface_finish(r->surface);
cairo_surface_destroy(r->surface);
if(r->outputStream) {
msBufferFree(r->outputStream);
free(r->outputStream);
}
free(r);
}
return MS_SUCCESS;
}
faceCacheObj *getFontFace(cairoCacheData *cache, const char *font)
{
faceCacheObj *newface = NULL;
faceCacheObj *cur=cache->facecache;
while(cur) {
if(!strcmp(cur->path,font))
return cur;
cur = cur->next;
}
newface = malloc(sizeof(faceCacheObj));
if(FT_New_Face(cache->library, font, 0, &(newface->ftface))) {
msSetError(MS_RENDERERERR,"Freetype failed to open font %s","getFontFace()",font);
free(newface);
return NULL;
}
/* Try to select charmap */
if (!newface->ftface->charmap) {
if( FT_Select_Charmap(newface->ftface, FT_ENCODING_MS_SYMBOL) )
FT_Select_Charmap(newface->ftface, FT_ENCODING_APPLE_ROMAN );
}
newface->next = cache->facecache;
cache->facecache = newface;
newface->face = cairo_ft_font_face_create_for_ft_face(newface->ftface, 0);
cairo_font_face_set_user_data (newface->face, &newface->facekey,
&(newface->ftface), (cairo_destroy_func_t) NULL); // we call FT_Done_Face ourselves in freeFaceCache
newface->path = msStrdup(font);
return newface;
}
#define msCairoSetSourceColor(cr, c) cairo_set_source_rgba((cr),(c)->red/255.0,(c)->green/255.0,(c)->blue/255.0,(c)->alpha/255.0);
int renderLineCairo(imageObj *img, shapeObj *p, strokeStyleObj *stroke)
{
int i,j;
cairo_renderer *r = CAIRO_RENDERER(img);
assert(stroke->color);
cairo_new_path(r->cr);
msCairoSetSourceColor(r->cr,stroke->color);
for(i=0; i<p->numlines; i++) {
lineObj *l = &(p->line[i]);
if(l->numpoints == 0) continue;
cairo_move_to(r->cr,l->point[0].x,l->point[0].y);
for(j=1; j<l->numpoints; j++) {
cairo_line_to(r->cr,l->point[j].x,l->point[j].y);
}
}
if(stroke->patternlength>0) {
cairo_set_dash(r->cr,stroke->pattern,stroke->patternlength,-stroke->patternoffset);
}
switch(stroke->linecap) {
case MS_CJC_BUTT:
cairo_set_line_cap(r->cr,CAIRO_LINE_CAP_BUTT);
break;
case MS_CJC_SQUARE:
cairo_set_line_cap(r->cr,CAIRO_LINE_CAP_SQUARE);
break;
case MS_CJC_ROUND:
case MS_CJC_NONE:
default:
cairo_set_line_cap(r->cr,CAIRO_LINE_CAP_ROUND);
}
cairo_set_line_width (r->cr, stroke->width);
cairo_stroke (r->cr);
if(stroke->patternlength>0) {
cairo_set_dash(r->cr,stroke->pattern,0,0);
}
return MS_SUCCESS;
}
int renderPolygonCairo(imageObj *img, shapeObj *p, colorObj *c)
{
cairo_renderer *r = CAIRO_RENDERER(img);
int i,j;
cairo_new_path(r->cr);
cairo_set_fill_rule(r->cr,CAIRO_FILL_RULE_EVEN_ODD);
msCairoSetSourceColor(r->cr,c);
for(i=0; i<p->numlines; i++) {
lineObj *l = &(p->line[i]);
cairo_move_to(r->cr,l->point[0].x,l->point[0].y);
for(j=1; j<l->numpoints; j++) {
cairo_line_to(r->cr,l->point[j].x,l->point[j].y);
}
cairo_close_path(r->cr);
}
cairo_fill(r->cr);
return MS_SUCCESS;
}
int renderPolygonTiledCairo(imageObj *img, shapeObj *p, imageObj *tile)
{
int i,j;
cairo_renderer *r = CAIRO_RENDERER(img);
cairo_renderer *tileRenderer = CAIRO_RENDERER(tile);
cairo_pattern_t *pattern = cairo_pattern_create_for_surface(tileRenderer->surface);
cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
cairo_set_source(r->cr, pattern);
for (i = 0; i < p->numlines; i++) {
lineObj *l = &(p->line[i]);
cairo_move_to(r->cr, l->point[0].x, l->point[0].y);
for (j = 1; j < l->numpoints; j++) {
cairo_line_to(r->cr, l->point[j].x, l->point[j].y);
}
/* cairo_close_path(r->cr); */
}
cairo_fill(r->cr);
cairo_pattern_destroy(pattern);
return MS_SUCCESS;
}
cairo_surface_t *createSurfaceFromBuffer(rasterBufferObj *b)
{
assert(b->type == MS_BUFFER_BYTE_RGBA);
return cairo_image_surface_create_for_data (b->data.rgba.pixels,
CAIRO_FORMAT_ARGB32,
b->width,
b->height,
b->data.rgba.row_step);
}
int renderPixmapSymbolCairo(imageObj *img, double x, double y,symbolObj *symbol,
symbolStyleObj *style)
{
cairo_renderer *r = CAIRO_RENDERER(img);
cairo_surface_t *im;
rasterBufferObj *b = symbol->pixmap_buffer;
assert(b);
if(!symbol->renderer_cache) {
symbol->renderer_cache = (void*)createSurfaceFromBuffer(b);
}
assert(symbol->renderer_cache);
im=(cairo_surface_t*)symbol->renderer_cache;
cairo_save(r->cr);
if(style->rotation != 0 || style->scale != 1) {
cairo_translate (r->cr, x,y);
cairo_rotate (r->cr, -style->rotation);
cairo_scale (r->cr, style->scale,style->scale);
cairo_translate (r->cr, -0.5*b->width, -0.5*b->height);
} else {
cairo_translate (r->cr, MS_NINT(x-0.5*b->width),MS_NINT(y-0.5*b->height));
}
cairo_set_source_surface (r->cr, im, 0, 0);
cairo_paint (r->cr);
cairo_restore(r->cr);
return MS_SUCCESS;
}
int renderVectorSymbolCairo(imageObj *img, double x, double y, symbolObj *symbol,
symbolStyleObj *style)
{
cairo_renderer *r = CAIRO_RENDERER(img);
double ox=symbol->sizex*0.5,oy=symbol->sizey*0.5;
int is_new = 1,i;
cairo_new_path(r->cr);
cairo_save(r->cr);
cairo_translate(r->cr,x,y);
cairo_scale(r->cr,style->scale,style->scale);
cairo_rotate(r->cr,-style->rotation);
cairo_translate(r->cr,-ox,-oy);
for (i = 0; i < symbol->numpoints; i++) {
if ((symbol->points[i].x == -99) && (symbol->points[i].y == -99)) { /* (PENUP) */
is_new = 1;
} else {
if (is_new) {
cairo_move_to(r->cr,symbol->points[i].x,symbol->points[i].y);
is_new = 0;
} else {
cairo_line_to(r->cr,symbol->points[i].x,symbol->points[i].y);
}
}
}
cairo_restore(r->cr);
if(style->color) {
msCairoSetSourceColor(r->cr,style->color);
cairo_fill_preserve(r->cr);
}
if(style->outlinewidth>0) {
msCairoSetSourceColor(r->cr,style->outlinecolor);
cairo_set_line_width (r->cr, style->outlinewidth);
cairo_stroke_preserve(r->cr);
}
cairo_new_path(r->cr);
return MS_SUCCESS;
}
#if defined(USE_SVG_CAIRO) || defined(USE_RSVG)
struct svg_symbol_cache {
rasterBufferObj *pixmap_buffer;
#ifdef USE_RSVG
RsvgHandle *svgc;
#else
svg_cairo_t *svgc;
#endif
double scale,rotation;
} ;
#endif
int renderSVGSymbolCairo(imageObj *img, double x, double y, symbolObj *symbol,
symbolStyleObj *style)
{
#if defined(USE_SVG_CAIRO) || defined(USE_RSVG)
struct svg_symbol_cache *cache;
cairo_renderer *r = CAIRO_RENDERER(img);
msPreloadSVGSymbol(symbol);
assert(symbol->renderer_cache);
cache = symbol->renderer_cache;
cairo_save(r->cr);
cairo_translate(r->cr,x,y);
cairo_scale(r->cr,style->scale,style->scale);
if (style->rotation != 0) {
cairo_rotate(r->cr, -style->rotation);
cairo_translate (r->cr, -(int)(symbol->sizex/2), -(int)(symbol->sizey/2));
} else
cairo_translate (r->cr, -(int)(symbol->sizex/2), -(int)(symbol->sizey/2));
#ifdef USE_SVG_CAIRO
{
svg_cairo_status_t status;
status = svg_cairo_render(cache->svgc, r->cr);
if(status != SVG_CAIRO_STATUS_SUCCESS) {
cairo_restore(r->cr);
return MS_FAILURE;
}
}
#else
rsvg_handle_render_cairo(cache->svgc, r->cr);
#endif
cairo_restore(r->cr);
return MS_SUCCESS;
#else
msSetError(MS_MISCERR, "SVG Symbols requested but is not built with libsvgcairo",
"renderSVGSymbolCairo()");
return MS_FAILURE;
#endif
}
int renderTruetypeSymbolCairo(imageObj *img, double x, double y, symbolObj *symbol,
symbolStyleObj *s)
{
int unicode;
cairo_glyph_t glyph;
cairo_text_extents_t extents;
cairo_matrix_t trans;
double ox,oy;
cairoCacheData *cache = MS_IMAGE_RENDERER_CACHE(img);
cairo_renderer *r = CAIRO_RENDERER(img);
faceCacheObj *face = getFontFace(cache,symbol->full_font_path);
if(!face) return MS_FAILURE;
cairo_save(r->cr);
cairo_set_font_face(r->cr,face->face);
cairo_set_font_size(r->cr,s->scale*96/72.0);
msUTF8ToUniChar(symbol->character, &unicode);
if (face->ftface->charmap &&
face->ftface->charmap->encoding == FT_ENCODING_MS_SYMBOL)
unicode |= 0xf000;
glyph.index = FT_Get_Char_Index(face->ftface, unicode);
glyph.x=0;
glyph.y=0;
cairo_glyph_extents(r->cr,&glyph,1,&extents);
ox=extents.x_bearing+extents.width/2.;
oy=extents.y_bearing+extents.height/2.;
cairo_matrix_init_rotate(&trans,-s->rotation);
cairo_matrix_transform_point(&trans,&ox,&oy);
/* cairo_translate(cr,-extents.width/2,-extents.height/2); */
cairo_translate(r->cr,x-ox,y-oy);
cairo_rotate(r->cr, -s->rotation);
cairo_glyph_path(r->cr,&glyph,1);
if (s->outlinewidth) {
msCairoSetSourceColor(r->cr, s->outlinecolor);
cairo_set_line_width(r->cr, s->outlinewidth + 1);
cairo_stroke_preserve(r->cr);
}
if(s->color) {
msCairoSetSourceColor(r->cr, s->color);
cairo_fill_preserve(r->cr);
}
cairo_new_path(r->cr);
cairo_restore(r->cr);
return MS_SUCCESS;
}
int renderTileCairo(imageObj *img, imageObj *tile, double x, double y)
{
cairo_renderer *r = CAIRO_RENDERER(img);
cairo_surface_t *im = CAIRO_RENDERER(tile)->surface;
int w = cairo_image_surface_get_width (im);
int h = cairo_image_surface_get_height (im);
cairo_save(r->cr);
cairo_translate(r->cr, MS_NINT(x-0.5 * w), MS_NINT(y -0.5 * h));
cairo_set_source_surface(r->cr, im, 0, 0);
cairo_pattern_set_filter (cairo_get_source (r->cr), CAIRO_FILTER_NEAREST);
cairo_paint(r->cr);
cairo_restore(r->cr);
return MS_SUCCESS;
}
#define CAIROLINESPACE 1.33
int getTruetypeTextBBoxCairo(rendererVTableObj *renderer, char **fonts, int numfonts, double size,
char *text, rectObj *rect, double **advances, int bAdjustBaseline)
{
cairoCacheData *cache = MS_RENDERER_CACHE(renderer);
faceCacheObj* face = getFontFace(cache,fonts[0]);
int curfontidx = 0;
char *utfptr=text;
int i,unicode;
unsigned long previdx=0;
faceCacheObj* prevface = face;
int numglyphs = msGetNumGlyphs(text);
cairo_glyph_t glyph;
cairo_text_extents_t extents;
double px=0,py=0;
if(face == NULL) {
return MS_FAILURE;
}
cairo_set_font_face(cache->dummycr,face->face);
cairo_set_font_size(cache->dummycr,size*96/72.0);
if(advances != NULL) {
*advances = (double*)malloc(numglyphs*sizeof(double));
}
for(i=0; i<numglyphs; i++) {
utfptr+=msUTF8ToUniChar(utfptr, &unicode);
glyph.x=px;
glyph.y=py;
if(unicode=='\n') {
py += ceil(size*CAIROLINESPACE);
px = 0;
previdx=0;
continue;
}
if (curfontidx != 0) {
face = getFontFace(cache, fonts[0]);
cairo_set_font_face(cache->dummycr, face->face);
curfontidx = 0;
}
if (face->ftface->charmap &&
face->ftface->charmap->encoding == FT_ENCODING_MS_SYMBOL)
unicode |= 0xf000;
glyph.index = FT_Get_Char_Index(face->ftface, unicode);
if (glyph.index == 0) {
int j;
for (j = 1; j < numfonts; j++) {
curfontidx = j;
face = getFontFace(cache, fonts[j]);
glyph.index = FT_Get_Char_Index(face->ftface, unicode);
if (glyph.index != 0) {
cairo_set_font_face(cache->dummycr, face->face);
break;
}
}
}
if( FT_HAS_KERNING((prevface->ftface)) && previdx ) {
FT_Vector delta;
FT_Get_Kerning( prevface->ftface, previdx, glyph.index, FT_KERNING_DEFAULT, &delta );
px += delta.x / 64.;
}
cairo_glyph_extents(cache->dummycr,&glyph,1,&extents);
if(i==0) {
rect->minx = px+extents.x_bearing;
rect->miny = py+extents.y_bearing;
rect->maxx = px+extents.x_bearing+extents.width;
rect->maxy = py+(bAdjustBaseline?1:(extents.y_bearing+extents.height));
} else {
rect->minx = MS_MIN(rect->minx,px+extents.x_bearing);
rect->miny = MS_MIN(rect->miny,py+extents.y_bearing);
rect->maxy = MS_MAX(rect->maxy,py+(bAdjustBaseline?1:(extents.y_bearing+extents.height)));
rect->maxx = MS_MAX(rect->maxx,px+extents.x_bearing+extents.width);
}
if(advances!=NULL)
(*advances)[i]=extents.x_advance;
px += extents.x_advance;
previdx=glyph.index;
prevface = face;
}
return MS_SUCCESS;
}
int renderGlyphsCairo(imageObj *img,double x, double y, labelStyleObj *style, char *text)
{
cairo_renderer *r = CAIRO_RENDERER(img);
cairoCacheData *cache = MS_IMAGE_RENDERER_CACHE(img);
faceCacheObj* face = getFontFace(cache,style->fonts[0]);
int curfontidx = 0;
char *utfptr=text;
int i,unicode;
unsigned long previdx=0;
faceCacheObj* prevface = face;
int numglyphs = msGetNumGlyphs(text);
cairo_glyph_t glyph;
cairo_text_extents_t extents;
double px=0,py=0;
if(face == NULL) {
return MS_FAILURE;
}
cairo_set_font_face(r->cr,face->face);
cairo_set_font_size(r->cr,style->size*96/72.0);
cairo_save(r->cr);
cairo_translate(r->cr,MS_NINT(x),MS_NINT(y));
if(style->rotation != 0.0)
cairo_rotate(r->cr, -style->rotation);
for(i=0; i<numglyphs; i++) {
utfptr+=msUTF8ToUniChar(utfptr, &unicode);
glyph.x=px;
glyph.y=py;
if(unicode=='\n') {
py += ceil(style->size*CAIROLINESPACE);
px = 0;
previdx=0;
continue;
}
if(curfontidx != 0) {
face = getFontFace(cache,style->fonts[0]);
cairo_set_font_face(r->cr,face->face);
curfontidx = 0;
}
if (face->ftface->charmap &&
face->ftface->charmap->encoding == FT_ENCODING_MS_SYMBOL)
unicode |= 0xf000;
glyph.index = FT_Get_Char_Index(face->ftface, unicode);
if(glyph.index == 0) {
int j;
for(j=1; j<style->numfonts; j++) {
curfontidx = j;
face = getFontFace(cache,style->fonts[j]);
glyph.index = FT_Get_Char_Index(face->ftface, unicode);
if(glyph.index != 0) {
cairo_set_font_face(r->cr,face->face);
break;
}
}
}
if( FT_HAS_KERNING((prevface->ftface)) && previdx ) {
FT_Vector delta;
FT_Get_Kerning( prevface->ftface, previdx, glyph.index, FT_KERNING_DEFAULT, &delta );
px += delta.x / 64.;
}
cairo_glyph_extents(r->cr,&glyph,1,&extents);
cairo_glyph_path(r->cr,&glyph,1);
px += extents.x_advance;
previdx=glyph.index;
prevface=face;
}
if (style->outlinewidth > 0) {
cairo_save(r->cr);
msCairoSetSourceColor(r->cr, style->outlinecolor);
cairo_set_line_width(r->cr, style->outlinewidth + 1);
cairo_stroke_preserve(r->cr);
cairo_restore(r->cr);
}
if(style->color) {
msCairoSetSourceColor(r->cr, style->color);
cairo_fill(r->cr);
}
cairo_new_path(r->cr);
cairo_restore(r->cr);
return MS_SUCCESS;
}
cairo_status_t _stream_write_fn(void *b, const unsigned char *data, unsigned int length)
{
msBufferAppend((bufferObj*)b,(void*)data,length);
return CAIRO_STATUS_SUCCESS;
}
imageObj* createImageCairo(int width, int height, outputFormatObj *format,colorObj* bg)
{
imageObj *image = NULL;
cairo_renderer *r=NULL;
if (format->imagemode != MS_IMAGEMODE_RGB && format->imagemode!= MS_IMAGEMODE_RGBA) {
msSetError(MS_MISCERR,
"Cairo driver only supports RGB or RGBA pixel models.","msImageCreateCairo()");
return image;
}
if (width > 0 && height > 0) {
image = (imageObj *) calloc(1, sizeof(imageObj));
r = (cairo_renderer*)calloc(1,sizeof(cairo_renderer));
if(!strcasecmp(format->driver,"cairo/pdf")) {
r->outputStream = (bufferObj*)malloc(sizeof(bufferObj));
msBufferInit(r->outputStream);
r->surface = cairo_pdf_surface_create_for_stream(
_stream_write_fn,
r->outputStream,
width,height);
} else if(!strcasecmp(format->driver,"cairo/svg")) {
r->outputStream = (bufferObj*)malloc(sizeof(bufferObj));
msBufferInit(r->outputStream);
r->surface = cairo_svg_surface_create_for_stream(
_stream_write_fn,
r->outputStream,
width,height);
} else if(!strcasecmp(format->driver,"cairo/winGDI") && format->device) {
#if CAIRO_HAS_WIN32_SURFACE
r->outputStream = NULL;
r->surface = cairo_win32_surface_create(format->device);
#else
msSetError(MS_RENDERERERR, "Cannot create cairo image. Cairo was not compiled with support for the win32 backend.",
"msImageCreateCairo()");
#endif
} else if(!strcasecmp(format->driver,"cairo/winGDIPrint") && format->device) {
#if CAIRO_HAS_WIN32_SURFACE
r->outputStream = NULL;
r->surface = cairo_win32_printing_surface_create(format->device);
#else
msSetError(MS_RENDERERERR, "Cannot create cairo image. Cairo was not compiled with support for the win32 backend.",
"msImageCreateCairo()");
#endif
} else {
r->outputStream = NULL;
r->surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
}
r->cr = cairo_create(r->surface);
if(format->transparent || !bg || !MS_VALID_COLOR(*bg)) {
r->use_alpha = 1;
cairo_set_source_rgba (r->cr, 0,0,0,0);
} else {
r->use_alpha = 0;
msCairoSetSourceColor(r->cr,bg);
}
cairo_save (r->cr);
cairo_set_operator (r->cr, CAIRO_OPERATOR_SOURCE);
cairo_paint (r->cr);
cairo_restore (r->cr);
cairo_set_line_cap (r->cr,CAIRO_LINE_CAP_ROUND);
cairo_set_line_join(r->cr,CAIRO_LINE_JOIN_ROUND);
image->img.plugin = (void*)r;
} else {
msSetError(MS_RENDERERERR, "Cannot create cairo image of size %dx%d.",
"msImageCreateCairo()", width, height);
}
return image;
}
/* msSaveImagePostPDFProcessing() will call the GDAL PDF driver to add geospatial */
/* information to the regular PDF generated by cairo. This is only triggered if the */
/* GEO_ENCODING outputformat option is set (to ISO32000 or OGC_BP). Additionnal */
/* options can be provided by specifying outputformat options starting with */
/* METADATA_ITEM: prefix. For example METADATA_ITEM:PRODUCER=MapServer */
/* Those options are AUTHOR, CREATOR, CREATION_DATE, KEYWORDS, PRODUCER, SUBJECT, TITLE */
/* See http://gdal.org/frmt_pdf.html documentation. */
static void msTransformToGeospatialPDF(imageObj *img, mapObj *map, cairo_renderer *r)
{
/* We need a GDAL 1.10 PDF driver at runtime, but as far as the C API is concerned, GDAL 1.9 is */
/* largely sufficient. */
#if defined(USE_GDAL) && defined(GDAL_VERSION_NUM) && GDAL_VERSION_NUM >= 1900
GDALDatasetH hDS = NULL;
const char* pszGEO_ENCODING = NULL;
GDALDriverH hPDFDriver = NULL;
const char* pszVirtualIO = NULL;
int bVirtualIO = FALSE;
char* pszTmpFilename = NULL;
VSILFILE* fp = NULL;
if (map == NULL)
return;
pszGEO_ENCODING = msGetOutputFormatOption(img->format, "GEO_ENCODING", NULL);
if (pszGEO_ENCODING == NULL)
return;
msGDALInitialize();
hPDFDriver = GDALGetDriverByName("PDF");
if (hPDFDriver == NULL)
return;
/* When compiled against libpoppler, the PDF driver is VirtualIO capable */
/* but not, when it is compiled against libpodofo. */
pszVirtualIO = GDALGetMetadataItem( hPDFDriver, GDAL_DCAP_VIRTUALIO, NULL );
if (pszVirtualIO)
bVirtualIO = CSLTestBoolean(pszVirtualIO);
if (bVirtualIO)
pszTmpFilename = msTmpFile(map, NULL, "/vsimem/mscairopdf/", "pdf");
else
pszTmpFilename = msTmpFile(map, map->mappath, NULL, "pdf");
/* Copy content of outputStream buffer into file */
fp = VSIFOpenL(pszTmpFilename, "wb");
if (fp == NULL) {
msFree(pszTmpFilename);
return;
}
VSIFWriteL(r->outputStream->data, 1, r->outputStream->size, fp);
VSIFCloseL(fp);
fp = NULL;
hDS = GDALOpen(pszTmpFilename, GA_Update);
if ( hDS != NULL ) {
char* pszWKT = msProjectionObj2OGCWKT( &(map->projection) );
if( pszWKT != NULL ) {
double adfGeoTransform[6];
int i;
/* Add user-specified options */
for( i = 0; i < img->format->numformatoptions; i++ ) {
const char* pszOption = img->format->formatoptions[i];
if( strncasecmp(pszOption,"METADATA_ITEM:",14) == 0 ) {
char* pszKey = NULL;
const char* pszValue = CPLParseNameValue(pszOption + 14,
&pszKey);
if( pszKey != NULL ) {
GDALSetMetadataItem(hDS, pszKey, pszValue, NULL);
CPLFree(pszKey);
}
}
}
/* We need to rescale the geotransform because GDAL will not necessary */
/* open the PDF with the DPI that was used to generate it */
memcpy(adfGeoTransform, map->gt.geotransform, 6 * sizeof(double));
adfGeoTransform[1] = adfGeoTransform[1] * map->width / GDALGetRasterXSize(hDS);
adfGeoTransform[5] = adfGeoTransform[5] * map->height / GDALGetRasterYSize(hDS);
GDALSetGeoTransform(hDS, adfGeoTransform);
GDALSetProjection(hDS, pszWKT);
msFree( pszWKT );
pszWKT = NULL;
CPLSetThreadLocalConfigOption("GDAL_PDF_GEO_ENCODING", pszGEO_ENCODING);
GDALClose(hDS);
hDS = NULL;
CPLSetThreadLocalConfigOption("GDAL_PDF_GEO_ENCODING", NULL);
/* We need to replace the buffer with the content of the GDAL file */
fp = VSIFOpenL(pszTmpFilename, "rb");
if( fp != NULL ) {
int nFileSize;
VSIFSeekL(fp, 0, SEEK_END);
nFileSize = (int)VSIFTellL(fp);
msBufferResize(r->outputStream, nFileSize);
VSIFSeekL(fp, 0, SEEK_SET);
VSIFReadL(r->outputStream->data, 1, nFileSize, fp);
r->outputStream->size = nFileSize;
VSIFCloseL(fp);
fp = NULL;
}
}
}
if ( hDS != NULL )
GDALClose(hDS);
VSIUnlink(pszTmpFilename);
msFree(pszTmpFilename);
#endif
}
int saveImageCairo(imageObj *img, mapObj *map, FILE *fp, outputFormatObj *format)
{
cairo_renderer *r = CAIRO_RENDERER(img);
if(!strcasecmp(img->format->driver,"cairo/pdf") || !strcasecmp(img->format->driver,"cairo/svg")) {
cairo_surface_finish (r->surface);
if (map != NULL && !strcasecmp(img->format->driver,"cairo/pdf"))
msTransformToGeospatialPDF(img, map, r);
msIO_fwrite(r->outputStream->data,r->outputStream->size,1,fp);
} else {
/* not supported */
}
return MS_SUCCESS;
}
unsigned char* saveImageBufferCairo(imageObj *img, int *size_ptr, outputFormatObj *format)
{
cairo_renderer *r = CAIRO_RENDERER(img);
unsigned char *data;
assert(!strcasecmp(img->format->driver,"cairo/pdf") || !strcasecmp(img->format->driver,"cairo/svg"));
cairo_surface_finish (r->surface);
data = msSmallMalloc(r->outputStream->size);
memcpy(data,r->outputStream->data,r->outputStream->size);
*size_ptr = (int)r->outputStream->size;
return data;
}
int renderEllipseSymbolCairo(imageObj *img, double x, double y, symbolObj *symbol,
symbolStyleObj *style)
{
cairo_renderer *r = CAIRO_RENDERER(img);
cairo_save(r->cr);
cairo_set_line_cap(r->cr, CAIRO_LINE_CAP_BUTT);
cairo_set_line_join(r->cr, CAIRO_LINE_JOIN_MITER);
cairo_translate(r->cr,x,y);
cairo_rotate(r->cr,-style->rotation);
cairo_scale(r->cr,symbol->sizex*style->scale/2,symbol->sizey*style->scale/2);
cairo_arc (r->cr, 0,0,1, 0, 2 * MS_PI);
cairo_restore(r->cr);
if(style->color) {
msCairoSetSourceColor(r->cr, style->color);
cairo_fill_preserve(r->cr);
}
if(style->outlinewidth > 0) {
cairo_set_line_width (r->cr, style->outlinewidth);
msCairoSetSourceColor(r->cr, style->outlinecolor);
cairo_stroke_preserve(r->cr);
}
cairo_new_path(r->cr);
return MS_SUCCESS;
}
int startLayerVectorCairo(imageObj *img, mapObj *map, layerObj *layer)
{
if(layer->opacity<100) {
cairo_renderer *r = CAIRO_RENDERER(img);
cairo_push_group (r->cr);
}
return MS_SUCCESS;
}
int closeLayerVectorCairo(imageObj *img, mapObj *map, layerObj *layer)
{
if(layer->opacity<100) {
cairo_renderer *r = CAIRO_RENDERER(img);
cairo_pop_group_to_source (r->cr);
cairo_paint_with_alpha (r->cr, layer->opacity*0.01);
}
return MS_SUCCESS;
}
int startLayerRasterCairo(imageObj *img, mapObj *map, layerObj *layer)
{
return MS_SUCCESS;
}
int closeLayerRasterCairo(imageObj *img, mapObj *map, layerObj *layer)
{
return MS_SUCCESS;
}
int getRasterBufferHandleCairo(imageObj *img, rasterBufferObj *rb)
{
unsigned char *pb;
cairo_renderer *r = CAIRO_RENDERER(img);
rb->type = MS_BUFFER_BYTE_RGBA;
pb = cairo_image_surface_get_data(r->surface);
rb->data.rgba.pixels = pb;
rb->data.rgba.row_step = cairo_image_surface_get_stride(r->surface);
rb->data.rgba.pixel_step=4;
rb->width = cairo_image_surface_get_width(r->surface);
rb->height = cairo_image_surface_get_height(r->surface);
rb->data.rgba.r = &(pb[2]);
rb->data.rgba.g = &(pb[1]);
rb->data.rgba.b = &(pb[0]);
if(r->use_alpha)
rb->data.rgba.a = &(pb[3]);
else
rb->data.rgba.a = NULL;
return MS_SUCCESS;
}
int getRasterBufferCopyCairo(imageObj *img, rasterBufferObj *rb)
{
cairo_renderer *r = CAIRO_RENDERER(img);
unsigned char *pb;
rb->type = MS_BUFFER_BYTE_RGBA;
rb->data.rgba.row_step = cairo_image_surface_get_stride(r->surface);
rb->data.rgba.pixel_step=4;
rb->width = cairo_image_surface_get_width(r->surface);
rb->height = cairo_image_surface_get_height(r->surface);
pb = (unsigned char*)malloc(rb->height * rb->data.rgba.row_step * sizeof(unsigned char*));
memcpy(pb,cairo_image_surface_get_data(r->surface),rb->height * rb->data.rgba.row_step);
rb->data.rgba.pixels = pb;
rb->data.rgba.r = &(pb[2]);
rb->data.rgba.g = &(pb[1]);
rb->data.rgba.b = &(pb[0]);
if(r->use_alpha)
rb->data.rgba.a = &(pb[3]);