// ------------------------------------------------------ make_distance_map ---
void
distance_map( double *data, unsigned int width, unsigned int height )
{
short * xdist = (short *) malloc( width * height * sizeof(short) );
short * ydist = (short *) malloc( width * height * sizeof(short) );
double * gx = (double *) calloc( width * height, sizeof(double) );
double * gy = (double *) calloc( width * height, sizeof(double) );
double * outside = (double *) calloc( width * height, sizeof(double) );
double * inside = (double *) calloc( width * height, sizeof(double) );
int i;
// Compute outside = edtaa3(bitmap); % Transform background (0's)
computegradient( data, width, height, gx, gy);
edtaa3(data, gx, gy, width, height, xdist, ydist, outside);
for( i=0; i<width*height; ++i)
{
if( outside[i] < 0.0 )
{
outside[i] = 0.0;
}
}
// Compute inside = edtaa3(1-bitmap); % Transform foreground (1's)
memset( gx, 0, sizeof(double)*width*height );
memset( gy, 0, sizeof(double)*width*height );
for( i=0; i<width*height; ++i)
data[i] = 1 - data[i];
computegradient( data, width, height, gx, gy );
edtaa3( data, gx, gy, width, height, xdist, ydist, inside );
for( i=0; i<width*height; ++i )
{
if( inside[i] < 0 )
{
inside[i] = 0.0;
}
}
// distmap = outside - inside; % Bipolar distance field
float vmin = +INFINITY;
for( i=0; i<width*height; ++i)
{
outside[i] -= inside[i];
if( outside[i] < vmin )
{
vmin = outside[i];
}
}
vmin = abs(vmin);
for( i=0; i<width*height; ++i)
{
float v = outside[i];
if ( v < -vmin) outside[i] = -vmin;
else if( v > +vmin) outside[i] = +vmin;
data[i] = (outside[i]+vmin)/(2*vmin);
}
free( xdist );
free( ydist );
free( gx );
free( gy );
free( outside );
free( inside );
}
static void makeDistanceMap(const uint8_t* _img, uint8_t* _outImg, uint32_t _width, uint32_t _height)
{
#if USE_EDTAA3
int16_t* xdist = (int16_t*)malloc(_width * _height * sizeof(int16_t) );
int16_t* ydist = (int16_t*)malloc(_width * _height * sizeof(int16_t) );
double* gx = (double*)calloc(_width * _height, sizeof(double) );
double* gy = (double*)calloc(_width * _height, sizeof(double) );
double* data = (double*)calloc(_width * _height, sizeof(double) );
double* outside = (double*)calloc(_width * _height, sizeof(double) );
double* inside = (double*)calloc(_width * _height, sizeof(double) );
uint32_t ii;
// Convert img into double (data)
double img_min = 255, img_max = -255;
for (ii = 0; ii < _width * _height; ++ii)
{
double v = _img[ii];
data[ii] = v;
if (v > img_max)
{
img_max = v;
}
if (v < img_min)
{
img_min = v;
}
}
// Rescale image levels between 0 and 1
for (ii = 0; ii < _width * _height; ++ii)
{
data[ii] = (_img[ii] - img_min) / (img_max - img_min);
}
// Compute outside = edtaa3(bitmap); % Transform background (0's)
computegradient(data, _width, _height, gx, gy);
edtaa3(data, gx, gy, _width, _height, xdist, ydist, outside);
for (ii = 0; ii < _width * _height; ++ii)
{
if (outside[ii] < 0)
{
outside[ii] = 0.0;
}
}
// Compute inside = edtaa3(1-bitmap); % Transform foreground (1's)
memset(gx, 0, sizeof(double) * _width * _height);
memset(gy, 0, sizeof(double) * _width * _height);
for (ii = 0; ii < _width * _height; ++ii)
{
data[ii] = 1.0 - data[ii];
}
computegradient(data, _width, _height, gx, gy);
edtaa3(data, gx, gy, _width, _height, xdist, ydist, inside);
for (ii = 0; ii < _width * _height; ++ii)
{
if (inside[ii] < 0)
{
inside[ii] = 0.0;
}
}
// distmap = outside - inside; % Bipolar distance field
uint8_t* out = _outImg;
for (ii = 0; ii < _width * _height; ++ii)
{
outside[ii] -= inside[ii];
outside[ii] = 128 + outside[ii] * 16;
if (outside[ii] < 0)
{
outside[ii] = 0;
}
if (outside[ii] > 255)
{
outside[ii] = 255;
}
out[ii] = 255 - (uint8_t) outside[ii];
}
free(xdist);
free(ydist);
free(gx);
free(gy);
free(data);
free(outside);
free(inside);
#else
sdfBuild(_outImg, _width, 8.0f, _img, _width, _height, _width);
#endif // USE_EDTAA3
}
// ------------------------------------------------------ make_distance_map ---
unsigned char *
make_distance_map( unsigned char *img,
unsigned int width, unsigned int height )
{
short * xdist = (short *) malloc( width * height * sizeof(short) );
short * ydist = (short *) malloc( width * height * sizeof(short) );
double * gx = (double *) calloc( width * height, sizeof(double) );
double * gy = (double *) calloc( width * height, sizeof(double) );
double * data = (double *) calloc( width * height, sizeof(double) );
double * outside = (double *) calloc( width * height, sizeof(double) );
double * inside = (double *) calloc( width * height, sizeof(double) );
int i;
// Convert img into double (data)
double img_min = 255, img_max = -255;
for( i=0; i<width*height; ++i)
{
double v = img[i];
data[i] = v;
if (v > img_max) img_max = v;
if (v < img_min) img_min = v;
}
// Rescale image levels between 0 and 1
for( i=0; i<width*height; ++i)
{
data[i] = (img[i]-img_min)/img_max;
}
// Compute outside = edtaa3(bitmap); % Transform background (0's)
computegradient( data, height, width, gx, gy);
edtaa3(data, gx, gy, height, width, xdist, ydist, outside);
for( i=0; i<width*height; ++i)
if( outside[i] < 0 )
outside[i] = 0.0;
// Compute inside = edtaa3(1-bitmap); % Transform foreground (1's)
memset(gx, 0, sizeof(double)*width*height );
memset(gy, 0, sizeof(double)*width*height );
for( i=0; i<width*height; ++i)
data[i] = 1 - data[i];
computegradient( data, height, width, gx, gy);
edtaa3(data, gx, gy, height, width, xdist, ydist, inside);
for( i=0; i<width*height; ++i)
if( inside[i] < 0 )
inside[i] = 0.0;
// distmap = outside - inside; % Bipolar distance field
unsigned char *out = (unsigned char *) malloc( width * height * sizeof(unsigned char) );
for( i=0; i<width*height; ++i)
{
outside[i] -= inside[i];
outside[i] = 128+outside[i]*16;
if( outside[i] < 0 ) outside[i] = 0;
if( outside[i] > 255 ) outside[i] = 255;
out[i] = 255 - (unsigned char) outside[i];
//out[i] = (unsigned char) outside[i];
}
free( xdist );
free( ydist );
free( gx );
free( gy );
free( data );
free( outside );
free( inside );
return out;
}
void Distmap::generate(Texture const &other) {
if (other.getWidth() != _width || other.getHeight() != _height)
throw std::runtime_error(
"Distmap cannot be generated from a different size texture.");
short *xdist = (short *)malloc(_width * _height * sizeof(short));
short *ydist = (short *)malloc(_width * _height * sizeof(short));
double *gx = (double *)calloc(_width * _height, sizeof(double));
double *gy = (double *)calloc(_width * _height, sizeof(double));
double *data = (double *)calloc(_width * _height, sizeof(double));
double *outside = (double *)calloc(_width * _height, sizeof(double));
double *inside = (double *)calloc(_width * _height, sizeof(double));
size_t i;
if (!xdist || !ydist || !gx || !gy || !data || !outside || !inside)
throw std::runtime_error("Cannot generated distmap, size is too big.");
// Convert img into double (data)
unsigned char *img = other.getData();
double img_min = 255;
double img_max = -255;
for (i = 0; i < _width * _height; ++i) {
double v = img[i];
data[i] = v;
if (v > img_max) img_max = v;
if (v < img_min) img_min = v;
}
// Rescale image levels between 0 and 1
for (i = 0; i < _width * _height; ++i) {
data[i] = (img[i]-img_min)/img_max;
}
// Compute outside = edtaa3(bitmap); % Transform background (0's)
computegradient(data, _width, _height, gx, gy);
edtaa3(data, gx, gy, _height, _width, xdist, ydist, outside);
for (i = 0; i < _width * _height; ++i)
if (outside[i] < 0)
outside[i] = 0.0;
// Compute inside = edtaa3(1-bitmap); % Transform foreground (1's)
memset(gx, 0, sizeof(double) * _width * _height);
memset(gy, 0, sizeof(double) * _width * _height);
for (i = 0; i < _width * _height; ++i)
data[i] = 1 - data[i];
computegradient(data, _width, _height, gx, gy);
edtaa3(data, gx, gy, _height, _width, xdist, ydist, inside);
for (i = 0; i < _width * _height; ++i) {
if (inside[i] < 0)
inside[i] = 0.0;
}
// distmap = outside - inside; % Bipolar distance field
for (i = 0; i < _width * _height; ++i) {
outside[i] -= inside[i];
outside[i] = 128+outside[i]*16;
if (outside[i] < 0) outside[i] = 0;
if (outside[i] > 255) outside[i] = 255;
_data[i] = 255 - (unsigned char) outside[i];
_data[i + 1] = 255 - (unsigned char) outside[i];
_data[i + 2] = 255 - (unsigned char) outside[i];
_data[i + 3] = 255 - (unsigned char) outside[i];
}
free(xdist);
free(ydist);
free(gx);
free(gy);
free(data);
free(outside);
free(inside);
}
void
_compute_sdf( double *data, unsigned int width, unsigned int height)
{
short * xdist = (short *) malloc( width * height * sizeof(short) );
short * ydist = (short *) malloc( width * height * sizeof(short) );
double * gx = (double *) calloc( width * height, sizeof(double) );
double * gy = (double *) calloc( width * height, sizeof(double) );
double * outside = (double *) calloc( width * height, sizeof(double) );
double * inside = (double *) calloc( width * height, sizeof(double) );
unsigned int i;
double vmin, vmax, v;
// Compute outside = edtaa3(bitmap); % Transform background (0's)
computegradient( data, height, width, gx, gy);
edtaa3(data, gx, gy, width, height, xdist, ydist, outside);
for( i=0; i<width*height; ++i)
{
if( outside[i] < 0.0 )
{
outside[i] = 0.0;
}
}
// Compute inside = edtaa3(1-bitmap); % Transform foreground (1's)
memset( gx, 0, sizeof(double)*width*height );
memset( gy, 0, sizeof(double)*width*height );
for( i=0; i<width*height; ++i)
data[i] = 1 - data[i];
computegradient( data, height, width, gx, gy );
edtaa3( data, gx, gy, width, height, xdist, ydist, inside );
for( i=0; i<width*height; ++i )
{
if( inside[i] < 0 )
{
inside[i] = 0.0;
}
}
// distmap = outside - inside; % Bipolar distance field
vmin = outside[0];
vmax = outside[0];
for( i=0; i<width*height; ++i)
{
outside[i] -= inside[i];
if( outside[i] < vmin ) {
vmin = outside[i];
} else if( outside[i] > vmax ){
vmax = outside[i];
}
}
vmax = -vmin;
for( i=0; i<width*height; ++i)
{
v = outside[i];
if ( v < vmin) outside[i] = vmin;
else if( v > vmax) outside[i] = vmax;
//data[i] = (outside[i]+vmin)/(2*vmin);
data[i] = (outside[i]-vmin) / (vmax-vmin);
}
free( xdist );
free( ydist );
free( gx );
free( gy );
free( outside );
free( inside );
}
void ewol::resource::DistanceFieldFont::generateDistanceField(const egami::ImageMono& _input, egami::Image& _output) {
std11::unique_lock<std11::recursive_mutex> lock(m_mutex);
int32_t size = _input.getSize().x() * _input.getSize().y();
std::vector<short> xdist(size);
std::vector<short> ydist(size);
std::vector<double> gx(size);
std::vector<double> gy(size);
std::vector<double> data(size);
std::vector<double> outside(size);
std::vector<double> inside(size);
// Convert img into double (data)
double img_min = 255, img_max = -255;
for (int32_t yyy = 0; yyy < _input.getSize().y(); ++yyy) {
for (int32_t xxx = 0; xxx < _input.getSize().x(); ++xxx) {
int32_t iii = yyy * _input.getSize().x() + xxx;
double v = _input.get(ivec2(xxx, yyy));
data[iii] = v;
if (v > img_max) {
img_max = v;
}
if (v < img_min) {
img_min = v;
}
}
}
// Rescale image levels between 0 and 1
for (int32_t yyy = 0; yyy < _input.getSize().y(); ++yyy) {
for (int32_t xxx = 0; xxx < _input.getSize().x(); ++xxx) {
int32_t iii = yyy * _input.getSize().x() + xxx;
data[iii] = (_input.get(ivec2(xxx, yyy))-img_min)/img_max;
}
}
// Compute outside = edtaa3(bitmap); % Transform background (0's)
computegradient(&data[0], _input.getSize().x(), _input.getSize().y(), &gx[0], &gy[0]);
edtaa3(&data[0], &gx[0], &gy[0], _input.getSize().x(), _input.getSize().y(), &xdist[0], &ydist[0], &outside[0]);
for(size_t iii = 0; iii < outside.size(); ++iii) {
if( outside[iii] < 0 ) {
outside[iii] = 0.0;
}
}
// Compute inside = edtaa3(1-bitmap); % Transform foreground (1's)
for(size_t iii = 0; iii < gx.size(); ++iii) {
gx[iii] = 0;
}
for(size_t iii = 0; iii < gy.size(); ++iii) {
gy[iii] = 0;
}
for(size_t iii = 0; iii < data.size(); ++iii) {
data[iii] = 1 - data[iii];
}
computegradient( &data[0], _input.getSize().x(), _input.getSize().y(), &gx[0], &gy[0]);
edtaa3(&data[0], &gx[0], &gy[0], _input.getSize().x(), _input.getSize().y(), &xdist[0], &ydist[0], &inside[0]);
for(size_t iii = 0; iii < inside.size(); ++iii) {
if( inside[iii] < 0 ) {
inside[iii] = 0.0;
}
}
_output.resize(_input.getSize(), etk::Color<>(0));
_output.clear(etk::Color<>(0));
for (int32_t xxx = 0; xxx < _output.getSize().x(); ++xxx) {
for (int32_t yyy = 0; yyy < _output.getSize().y(); ++yyy) {
int32_t iii = yyy * _output.getSize().x() + xxx;
outside[iii] -= inside[iii];
outside[iii] = 128+outside[iii]*16;
if( outside[iii] < 0 ) {
outside[iii] = 0;
}
if( outside[iii] > 255 ) {
outside[iii] = 255;
}
uint8_t val = 255 - (unsigned char) outside[iii];
// TODO : Remove multiple size of the map ...
_output.set(ivec2(xxx, yyy), etk::Color<>((int32_t)val,(int32_t)val,(int32_t)val,255));
}
}
}