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/*
* Copyright 2008-2013 Steven Dalton
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @file matrix_canvas_svg_output.cc
* Functions to save the current view as an SVG file.
*/
/*
* David Gleich
* 1 August 2007
* Copyright, Stanford University
*/
#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <cusp/opengl/spy/matrix_canvas.h>
namespace cusp
{
namespace opengl
{
namespace spy
{
static void color2rgb(float *color, int& r, int &g, int &b)
{
r = (int)(color[0]*255.0f);
g = (int)(color[1]*255.0f);
b = (int)(color[2]*255.0f);
}
template< typename IndexType, typename ValueType, typename MemorySpace >
void matrix_canvas<IndexType,ValueType,MemorySpace>::write_svg()
{
std::cout << "writing matrix to spy.svg ... " << std::endl;
FILE *svgfile = fopen("spy.svg", "wt");
if (!svgfile) {
printf("spy.svg not writable\n");
return;
}
fprintf(svgfile, "<?xml version=\"1.0\" standalone=\"no\"?>\n<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\"\n \"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n");
float onepx = scale_to_world(1.0f);
int r,g,b;
{
GLint view[4];
glGetIntegerv(GL_VIEWPORT, view);
color2rgb(background_color, r, g, b);
fprintf(svgfile, "<svg viewbox=\"%i %i %i %i\" xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\" width=\"%d\" height=\"%d\">\n",
0, 0, view[2], view[3], view[2], view[3]);
fprintf(svgfile, "<rect x=\"%i\" y=\"%i\" width=\"%i\" height=\"%i\" fill=\"rgb(%i,%i,%i)\" />\n",
0, 0, view[2], view[3], r,g,b);
}
{
GLint view[4];
GLdouble model[16], proj[16], total[16];
glGetIntegerv(GL_VIEWPORT, view);
glGetDoublev(GL_MODELVIEW_MATRIX, model);
glGetDoublev(GL_PROJECTION_MATRIX, proj);
fprintf(svgfile, "<g transform=\"translate(%lf,%lf)\">\n",
(double)view[2]/2.0, (double)view[3]/2.0);
fprintf(svgfile, "<g transform=\"scale(%lf,%lf)\">\n",
(double)view[2]/2.0, (double)view[3]/-2.0);
// compute the matrix product, matrices in column-major
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 4; j++)
{
// i is the column, j is the row
GLdouble sum = 0.0;
for (int k = 0; k < 4; k++)
{
// dot product between row j in proj, and col i in model
sum += proj[4*k+j]*model[4*i+k];
}
total[i*4+j] = sum;
}
}
fprintf(svgfile, "<g transform=\"matrix(%lf,%lf,%lf,%lf,%lf,%lf)\">\n",
total[0], total[1], total[4], total[5], total[12], total[13]);
}
//
// write the border
//
int m = _m.num_rows;
int n = _m.num_cols;
color2rgb(border_color, r, g, b);
fprintf(svgfile, "<line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" stroke-width=\"%f\" stroke-opacity=\"%f\" stroke=\"rgb(%i,%i,%i)\" />\n",
-0.5f,-0.5f,-0.5f,m-0.5f,onepx/2,1.0,r,g,b);
fprintf(svgfile, "<line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" stroke-width=\"%f\" stroke-opacity=\"%f\" stroke=\"rgb(%i,%i,%i)\" />\n",
-0.5f,m-0.5f,n-0.5f,m-0.5f,onepx/2,1.0,r,g,b);
fprintf(svgfile, "<line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" stroke-width=\"%f\" stroke-opacity=\"%f\" stroke=\"rgb(%i,%i,%i)\" />\n",
n-0.5f,m-0.5f,n-0.5f,-0.5f,onepx/2,1.0,r,g,b);
fprintf(svgfile, "<line x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" stroke-width=\"%f\" stroke-opacity=\"%f\" stroke=\"rgb(%i,%i,%i)\" />\n",
n-0.5f,-0.5f,-0.5f,-0.5f,onepx/2,1.0,r,g,b);
//
// write through the matrix
//
{
ValueType v;
int colormap_entry;
//float pts=(zoom / (virtual_width*aspect/(float)width));
float x1,y1,x2,y2;
world_extents(x1,y1,x2,y2);
int r1=(int)floor(y1),r2=(int)floor(y2);
int c1=(int)floor(x1),c2=(int)floor(x2);
ValueType max_val = matrix_stats.max_val;
ValueType min_val = matrix_stats.min_val;
if (max_val - min_val <= 0)
{
// this sets min_val to something reasonable, and
// shows the high end of the colormap if the values
// are all equal
min_val = max_val - 1.0;
}
ValueType inv_val_range = 1.0/(max_val - min_val);
float alpha = alpha_from_zoom();
if (normalization_state != no_normalization) {
min_val = 0.0;
max_val = 1.0f;
inv_val_range = 1.0f;
}
for (int pi = std::max(0,r1); pi < std::min(r2, m); ++pi)
{
if (pi-std::max(0,r1)>0 && (pi-std::max(0,r1)) % 10000 == 0 &&
std::min(r2, m) - std::max(0,r1) >= 20000) {
std::cout << " writing row " << (pi-std::max(0,r1))
<< " of " << std::min(r2, m) - std::max(0,r1)
<< std::endl;
}
// i is the real row in the matrix for the pith row
// of the display
int i=pi;
if (permutation_state == row_permutation ||
permutation_state == row_column_permutation) {
i=irperm[i];
}
for (IndexType ri = _m.row_offsets[i]; ri < _m.row_offsets[i+1]; ++ri)
{
// j is the real column in the matrix for the pjth
// column of the display
int j = _m.column_indices[ri];
int pj = j;
if (permutation_state == column_permutation ||
permutation_state == row_column_permutation) {
pj = cperm[pj];
}
// skip all the columns outside
if (pj < c1 || pj > c2) { continue; }
v = _m.values[ri];
if (normalization_state == row_normalization ||
normalization_state == row_column_normalization) {
v*=rnorm[i];
}
if (normalization_state == column_normalization ||
normalization_state == row_column_normalization) {
v*=cnorm[j];
}
// scale v to the range [0,1]
v = v - min_val;
v = v*inv_val_range;
if (!colormap_invert) {
colormap_entry = (int)(v*(colormap.size-1));
} else {
colormap_entry = (int)(v*(colormap.size-1));
colormap_entry=colormap.size-1-colormap_entry;
}
color2rgb(&colormap.map[colormap_entry*3],r,g,b);
fprintf(svgfile, "<circle cx=\"%g\" cy=\"%g\" r=\"%g\" fill=\"rgb(%i,%i,%i)\" opacity=\"%g\"/>\n",
(float)pi,(float)pj, (std::max)(0.5f,onepx/2.0f), r,g,b, alpha);
}
}
}
fprintf(svgfile,"</g>\n");
fprintf(svgfile,"</g>\n");
fprintf(svgfile,"</g>\n");
fprintf(svgfile, "</svg>\n");
fclose(svgfile);
}
} // end spy
} // end opengl
} // end cusp
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