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//
// "$Id$"
//
// SVG image code for the Fast Light Tool Kit (FLTK).
//
// Copyright 2017 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
#include <config.h>
#if defined(FLTK_USE_NANOSVG) || defined(FL_DOXYGEN)
#include <FL/Fl_SVG_Image.H>
#include <FL/fl_utf8.h>
#include <stdio.h>
#include <stdlib.h>
#if !defined(HAVE_LONG_LONG)
static double strtoll(const char *str, char **endptr, int base) {
return (double)strtol(str, endptr, base);
}
#endif
#define NANOSVG_ALL_COLOR_KEYWORDS // Include full list of color keywords.
#define NANOSVG_IMPLEMENTATION // Expands implementation
#include "../nanosvg/nanosvg.h"
#define NANOSVGRAST_IMPLEMENTATION // Expands implementation
#include "../nanosvg/altsvgrast.h"
/** The constructor loads the SVG image from the given .svg filename or in-memory data.
\param filename A full path and name pointing to an SVG file, or NULL.
\param filedata A pointer to the memory location of the SVG image data.
This parameter allows to load an SVG image from in-memory data, and is used when \p filename is NULL.
\note In-memory SVG data is modified by the object constructor and is no longer used after construction.
*/
Fl_SVG_Image::Fl_SVG_Image(const char *filename, char *filedata) : Fl_RGB_Image(NULL, 0, 0, 4) {
init_(filename, filedata, NULL);
}
// private constructor
Fl_SVG_Image::Fl_SVG_Image(Fl_SVG_Image *source) : Fl_RGB_Image(NULL, 0, 0, 4) {
init_(NULL, NULL, source);
}
/** The destructor frees all memory and server resources that are used by the SVG image. */
Fl_SVG_Image::~Fl_SVG_Image() {
if ( --counted_svg_image_->ref_count <= 0) {
nsvgDelete(counted_svg_image_->svg_image);
delete counted_svg_image_;
}
}
float Fl_SVG_Image::svg_scaling_(int W, int H) {
float f1 = float(W) / int(counted_svg_image_->svg_image->width+0.5);
float f2 = float(H) / int(counted_svg_image_->svg_image->height+0.5);
return (f1 < f2) ? f1 : f2;
}
void Fl_SVG_Image::init_(const char *filename, char *filedata, Fl_SVG_Image *copy_source) {
if (copy_source) {
filename = filedata = NULL;
counted_svg_image_ = copy_source->counted_svg_image_;
counted_svg_image_->ref_count++;
} else {
counted_svg_image_ = new counted_NSVGimage;
counted_svg_image_->svg_image = NULL;
counted_svg_image_->ref_count = 1;
}
to_desaturate_ = false;
average_weight_ = 1;
proportional = true;
if (filename) {
filedata = NULL;
FILE *fp = fl_fopen(filename, "rb");
if (fp) {
fseek(fp, 0, SEEK_END);
size_t size = ftell(fp);
fseek(fp, 0, SEEK_SET);
filedata = (char*)malloc(size+1);
if (filedata) {
if (fread(filedata, 1, size, fp) == size) filedata[size] = '\0';
else {
free(filedata);
filedata = NULL;
}
}
fclose(fp);
} else ld(ERR_FILE_ACCESS);
}
if (filedata) {
counted_svg_image_->svg_image = nsvgParse(filedata, "px", 96);
if (filename) free(filedata);
if (counted_svg_image_->svg_image->width == 0 || counted_svg_image_->svg_image->height == 0) {
d(-1);
ld(ERR_FORMAT);
} else {
w(counted_svg_image_->svg_image->width + 0.5);
h(counted_svg_image_->svg_image->height + 0.5);
}
} else if (copy_source) {
w(copy_source->w());
h(copy_source->h());
}
rasterized_ = false;
}
void Fl_SVG_Image::rasterize_(int W, int H) {
static NSVGrasterizer *rasterizer = nsvgCreateRasterizer();
double fx, fy;
if (proportional) {
fx = svg_scaling_(W, H);
fy = fx;
} else {
fx = (double)W / counted_svg_image_->svg_image->width;
fy = (double)H / counted_svg_image_->svg_image->height;
}
array = new uchar[W*H*4];
nsvgAltRasterize(rasterizer, counted_svg_image_->svg_image, 0, 0, fx, fy, (uchar* )array, W, H, W*4);
alloc_array = 1;
data((const char * const *)&array, 1);
d(4);
if (to_desaturate_) Fl_RGB_Image::desaturate();
if (average_weight_ < 1) Fl_RGB_Image::color_average(average_color_, average_weight_);
rasterized_ = true;
raster_w_ = W;
raster_h_ = H;
}
Fl_Image *Fl_SVG_Image::copy(int W, int H) {
Fl_SVG_Image *svg2 = new Fl_SVG_Image(this);
svg2->to_desaturate_ = to_desaturate_;
svg2->average_weight_ = average_weight_;
svg2->average_color_ = average_color_;
svg2->proportional = proportional;
svg2->w(W); svg2->h(H);
return svg2;
}
/** Have the svg data (re-)rasterized using the given width and height values.
By default, the resulting image w() and h() will preserve the width/height ratio
of the SVG data.
If \ref proportional was set to false, the image is rasterized to the given \c width
and \c height values.*/
void Fl_SVG_Image::resize(int width, int height) {
if (ld() < 0) {
return;
}
int w1 = width, h1 = height;
if (proportional) {
float f = svg_scaling_(width, height);
w1 = int( int(counted_svg_image_->svg_image->width+0.5)*f + 0.5 );
h1 = int( int(counted_svg_image_->svg_image->height+0.5)*f + 0.5 );
}
w(w1); h(h1);
if (rasterized_ && w1 == raster_w_ && h1 == raster_h_) return;
if (array) {
delete[] array;
array = NULL;
}
uncache();
rasterize_(w1, h1);
}
void Fl_SVG_Image::draw(int X, int Y, int W, int H, int cx, int cy) {
resize(w(), h());
Fl_RGB_Image::draw(X, Y, W, H, cx, cy);
}
void Fl_SVG_Image::desaturate() {
to_desaturate_ = true;
Fl_RGB_Image::desaturate();
}
void Fl_SVG_Image::color_average(Fl_Color c, float i) {
average_color_ = c;
average_weight_ = i;
Fl_RGB_Image::color_average(c, i);
}
int Fl_SVG_Image::draw_scaled(int X, int Y, int W, int H) {
w(W);
h(H);
draw(X, Y, W, H, 0, 0);
return 1;
}
#endif // FLTK_USE_NANOSVG
//
// End of "$Id$".
//
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