osx/test/Shader/ShaderImage.cpp

   1 #include <psychlops.h>
   2 using namespace Psychlops;
   3
   4 void psychlops_main() {
   5         Canvas cnvs(1024,768,Canvas::window);
   6         cnvs.watchFPS();
   7         cnvs.showFPS();
   8         Mouse::show();
   9         Color::setGammaValue(1.0,1.0,1.0);
  10
  11         Figures::ShaderImage img;
  12 /*      img.setFunction(
  13                 "uniform float frequency;"
  14                 "void main(void){"
  15                 "float sigma_ = 2.0/frequency;"
  16                 "float freq_ = frequency;"
  17                 "float r = length(vec2(xp()-RECT_WIDTH/2.0, yp()-RECT_HEIGHT/2.0));"
  18                 "float level = 0.5+0.5*cos(r*freq_) * GaussianM0(r, sigma_);"
  19                 "gl_FragColor = vec4(level, 0.0,0.0,1.0);"
  20                 "}"
  21         );*/
  22 /*
  23         img.setFunction(
  24                 "uniform float frequency;"
  25                 "vec4 GaussianConvolute(in float frequency_) {"
  26                 "float sigma_ = 2.0/frequency_;"
  27                 "int lim = int(sigma_*3.0);"
  28                 "vec4 color = vec4(0.0,0.0,0.0,0.0);"
  29                 "float factor = 0.0, cur=0.0, r=0.0;"
  30                 "for(int y=-lim; y<=lim; y++) { for(int x=-lim; x<=lim; x++) {"
  31                 "     r = length(vec2(x,y));"
  32                 "     cur = cos(r*frequency_) * GaussianM0(r, sigma_);"
  33                 "     factor += cur;"
  34                 "     color += cur*getPix(x,y);"
  35                 "} }"
  36                 "color /= factor;"
  37                 "return color;"
  38                 "}"
  39                 "void main(void){"
  40 //              "float _y = abs(xi()-0.5)*frequency;"
  41                 "gl_FragColor = GaussianConvolute(frequency);"
  42                 "}"
  43         );*/
  44 /*      img.setFunction(
  45                 "uniform float sigma;"
  46                 "vec4 GaussianConvolute(in float sigma_) {"
  47                 "int lim = int(sigma_*3.0);"
  48                 "vec4 color = vec4(0.0,0.0,0.0,0.0);"
  49                 "float factor = 0.0, cur=0.0;"
  50                 "for(int y=-lim; y<=lim; y++) { for(int x=-lim; x<=lim; x++) {"
  51                 "     cur = GaussianM0(length(ivec2(x,y)), sigma_);"
  52                 "     factor += cur;"
  53                 "     color += cur*getPix(x,y);"
  54                 "} }"
  55                 "return color / factor;"
  56                 "}"
  57                 "void main(void){"
  58                 "float _y = abs(xi()-0.5)*sigma;"
  59                 "gl_FragColor = GaussianConvolute(_y);"
  60                 "}"
  61         );
  62 */      img.setFunction(
  63                 "uniform float dh, sigma, MX, MY;"
  64                 "void main(void){"
  65                 "vec4 hsv = RGBtoHSV(getPix());"
  66                 "hsv[0] = mod(hsv[0]+dh, 360.0);"
  67                 //"hsv[1] = hsv[1]*GaussianM0(length(vec2(xfp()-MX, yfp()-MY)), sigma);"
  68                 //"hsv[2] = 0.5+(hsv[2]-0.5)*GaussianM0(length(vec2(xfp()-MX, yfp()-MY)), sigma);"
  69                 "gl_FragColor = HSVtoRGB(hsv);"
  70                 "}"
  71         );
  72         img.orig_vars.push_back("dh");
  73         img.orig_vars.push_back("sigma");
  74         img.orig_vars.push_back("MX");
  75         img.orig_vars.push_back("MY");
  76         Image orig_img("01.png");
  77         orig_img.cache();
  78         img.cache();
  79
  80
  81
  82         double val = 0, sigma = 100.0;
  83         Widgets::Dial dial1, dial2;
  84         dial1.link(val,   360).set(50).centering(50,700);
  85         dial2.link(sigma, 100).set(50).centering(150,700);
  86
  87
  88         while(!Keyboard::esc.pushed()) {
  89                 img.var(img.orig_vars[2], cnvs.mouse().x-orig_img.getDatum().x);
  90                 img.var(img.orig_vars[3], cnvs.mouse().y-orig_img.getDatum().y);
  91                 if(dial1.changed()) img.var(img.orig_vars[0], val);
  92                 if(dial2.changed()) img.var(img.orig_vars[1], sigma);
  93                 cnvs.clear(Color::gray);
  94 //              orig_img.centering(300,300);
  95                 orig_img.centering();
  96                 img.draw(orig_img);
  97 //              orig_img.centering(700,550).draw();
  98                 dial1.draw();
  99                 dial2.draw();
 100                 cnvs.flip();
 101         }
 102 }
 103