texture_2d tangent_flow_map(const texture_2d& src, float sigma) {
texture_2d tmp0(src.clone_format());
texture_2d tmp1(src.clone_format());
texture_2d dst(src.clone_format());
glsl_program sst("sst_fs.glsl");
sst.use();
sst.bind_sampler("img", src);
sst.set_uniform_2f("img_size", (float)src.get_width(), (float)src.get_height());
sst.draw(&tmp0);
glsl_program gauss("gauss_fs.glsl");
gauss.use();
gauss.bind_sampler("img", tmp0);
gauss.set_uniform_2f("img_size", (float)src.get_width(), (float)src.get_height());
gauss.set_uniform_1f("sigma", sigma);
gauss.draw(&tmp1);
glsl_program tfm("tfm_fs.glsl");
tfm.use();
tfm.bind_sampler("img", tmp1);
tfm.set_uniform_2f("img_size", (float)src.get_width(), (float)src.get_height());
tfm.draw(&dst);
return dst;
}
texture_2d smooth_filter(const texture_2d& tfm,
const texture_2d& img,
int type,
float sigma)
{
texture_2d dst(tfm.clone_format());
if (type == 3) {
glsl_program glsl("lic_fs.glsl");
glsl.use();
glsl.bind_sampler("tfm", tfm);
glsl.bind_sampler("img", img);
glsl.set_uniform_1f("sigma", sigma);
glsl.set_uniform_2f("img_size", (float)dst.get_width(), (float)dst.get_height());
glsl.draw(&dst);
} else {
glsl_program gauss((type == 1)? "gauss3x3_fs.glsl" : "gauss5x5_fs.glsl");
gauss.use();
gauss.bind_sampler("img", img);
gauss.set_uniform_2f("img_size", (float)dst.get_width(), (float)dst.get_height());
gauss.draw(&dst);
}
return dst;
}
texture_2d color_quantization(const texture_2d& img,
int nbins,
float phi_q,
int filter)
{
texture_2d dst(img.clone_format());
texture_2d tmp(img.clone_format());
glsl_program cq("color_quantization_fs.glsl");
cq.use();
cq.bind_sampler("img", img);
cq.set_uniform_1i("nbins", nbins);
cq.set_uniform_1f("phi_q", phi_q);
cq.set_uniform_2f("img_size", (float)dst.get_width(), (float)dst.get_height());
cq.draw(&tmp);
if (filter) {
glsl_program gauss((filter == 1)? "gauss3x3_fs.glsl" : "gauss5x5_fs.glsl");
gauss.use();
gauss.bind_sampler("img", tmp);
gauss.set_uniform_2f("img_size", (float)dst.get_width(), (float)dst.get_height());
gauss.draw(&dst);
} else {
dst = tmp;
}
return dst;
}
texture_2d fdog_filter(const texture_2d& src,
const texture_2d& tfm,
int n,
float sigma_e,
float sigma_r,
float tau,
float sigma_m,
float phi)
{
texture_2d tmp(src.clone_format());
texture_2d dst(src.clone_format());
for (int i = 0; i < n; ++i) {
texture_2d img = (i == 0)? src : overlay(dst, src);
glsl_program fdog0("fdog0_fs.glsl");
fdog0.use();
fdog0.bind_sampler("img", img, GL_LINEAR);
fdog0.bind_sampler("tfm", tfm, GL_NEAREST);
fdog0.set_uniform_1f("sigma_e", sigma_e);
fdog0.set_uniform_1f("sigma_r", sigma_r);
fdog0.set_uniform_1f("tau", tau);
fdog0.set_uniform_2f("img_size", (float)src.get_width(), (float)src.get_height());
fdog0.draw(&tmp);
glsl_program fdog1("fdog1_fs.glsl");
fdog1.use();
fdog1.bind_sampler("img", tmp, GL_LINEAR);
fdog1.bind_sampler("tfm", tfm, GL_NEAREST);
fdog1.set_uniform_1f("sigma_m", sigma_m);
fdog1.set_uniform_1f("phi", phi);
fdog1.set_uniform_2f("img_size", (float)src.get_width(), (float)src.get_height());
fdog0.draw(&dst);
}
return dst;
}
texture_2d orientation_aligned_bilateral_filter(const texture_2d& src,
const texture_2d& tfm,
int n,
float sigma_d,
float sigma_r)
{
texture_2d tmp(src.clone_format());
texture_2d dst(src.clone_format());
glsl_program glsl("bf_fs.glsl");
glsl.use();
glsl.set_uniform_2f("img_size", (float)src.get_width(), (float)src.get_height());
glsl.set_uniform_1f("sigma_d", sigma_d);
glsl.set_uniform_1f("sigma_r", sigma_r);
glsl.bind_sampler("tfm", tfm);
for (int i = 0; i < n; ++i) {
glsl.bind_sampler("img", (i == 0)? src : dst, GL_LINEAR);
glsl.set_uniform_1i("pass", 0);
glsl.draw(&tmp);
glsl.bind_sampler("img", tmp, GL_LINEAR);
glsl.set_uniform_1i("pass", 1);
glsl.draw(&dst);
}
return dst;
}
texture_2d lab2rgb(const texture_2d& src) {
glsl_program glsl("lab2rgb_fs.glsl");
texture_2d dst(src.clone_format());
glsl.use();
glsl.bind_sampler("img", src);
glsl.set_uniform_2f("img_size", (float)src.get_width(), (float)src.get_height());
glsl.draw(&dst);
return dst;
}
texture_2d gauss_filter(const texture_2d& src,
float sigma)
{
glsl_program glsl("gauss_fs.glsl");
texture_2d dst(src.clone_format());
glsl.use();
glsl.bind_sampler("img", src);
glsl.set_uniform_1f("sigma", sigma);
glsl.set_uniform_2f("img_size", (float)src.get_width(), (float)src.get_height());
glsl.draw(&dst);
return dst;
}
texture_2d overlay(const texture_2d& edges,
const texture_2d& img)
{
texture_2d dst(edges.clone_format());
glsl_program glsl("overlay_fs.glsl");
glsl.use();
glsl.bind_sampler("edges", edges);
glsl.bind_sampler("img", img);
glsl.set_uniform_2f("img_size", (float)dst.get_width(), (float)dst.get_height());
glsl.draw(&dst);
return dst;
}
texture_2d mix_filter(const texture_2d& edges,
const texture_2d& img, float edge_color[3])
{
texture_2d dst(edges.clone_format());
glsl_program glsl("mix_fs.glsl");
glsl.use();
glsl.bind_sampler("edges", edges);
glsl.bind_sampler("img", img);
glsl.set_uniform_2f("img_size", (float)dst.get_width(), (float)dst.get_height());
glsl.set_uniform_3f("edge_color", edge_color[0], edge_color[1], edge_color[2]);
glsl.draw(&dst);
return dst;
}
texture_2d lic_filter(const texture_2d& tfm,
const texture_2d& img,
float sigma)
{
texture_2d dst(tfm.clone_format());
glsl_program glsl("lic_fs.glsl");
glsl.use();
glsl.bind_sampler("tfm", tfm);
glsl.bind_sampler("img", img);
glsl.set_uniform_1f("sigma", sigma);
glsl.set_uniform_2f("img_size", (float)dst.get_width(), (float)dst.get_height());
glsl.draw(&dst);
return dst;
}
texture_2d dog_filter(const texture_2d& src,
int n,
float sigma_e,
float sigma_r,
float tau,
float phi)
{
texture_2d tmp(src.clone_format());
//texture_2d dst(src.clone_format());
for (int i = 0; i < n; ++i) {
texture_2d img = (i == 0)? src : overlay(tmp, src);
glsl_program dog("dog_fs.glsl");
dog.use();
dog.bind_sampler("img", img, GL_NEAREST);
dog.set_uniform_1f("sigma_e", sigma_e);
dog.set_uniform_1f("sigma_r", sigma_r);
dog.set_uniform_1f("tau", tau);
dog.set_uniform_1f("phi", phi);
dog.set_uniform_2f("img_size", (float)src.get_width(), (float)src.get_height());
dog.draw(&tmp);
}
return tmp;
}