3 #include "colorcurve.h"
15 ColorCurve::ColorCurve():
16 shprog(Resources::get_global().get<Program>("_colorcurve.glsl.shader")),
17 quad(Resources::get_global().get<Mesh>("_fullscreen_quad.mesh")),
18 linear_sampler(Resources::get_global().get<Sampler>("_linear_clamp.samp")),
19 nearest_sampler(Resources::get_global().get<Sampler>("_nearest_clamp.samp"))
21 curve.storage(LUMINANCE8, 256, 1);
23 set_exposure_adjust(0.0f);
24 set_brightness_response(0.4f);
28 void ColorCurve::set_exposure_adjust(float e)
30 shdata.uniform("exposure", pow(2.0f, e));
33 void ColorCurve::set_brightness_response(float b)
36 throw invalid_argument("ColorCurve::set_brightness_response");
37 // Calculate an offset value to obtain a derivative of 1 at zero intensity.
38 float t = (b<1 ? pow(b, 1/(1-b)) : 0.0f);
39 shdata.uniform("brightness_response", b, t, pow(t, b));
42 void ColorCurve::set_gamma(float g)
45 throw invalid_argument("ColorCurve::set_gamma");
47 unsigned char curve_data[256];
48 for(unsigned i=0; i<256; ++i)
49 curve_data[i] = pow(i/255.0f, 1/g)*255+0.5f;
50 curve.image(0, curve_data);
53 void ColorCurve::set_srgb()
55 unsigned char curve_data[256];
57 for(unsigned i=1; i<256; ++i)
58 curve_data[i] = to_srgb(i/255.0f)*255+0.5f;
59 curve.image(0, curve_data);
62 void ColorCurve::set_linear()
64 unsigned char curve_data[256];
65 for(unsigned i=0; i<256; ++i)
67 curve.image(0, curve_data);
70 void ColorCurve::render(Renderer &renderer, const Texture2D &color_buf, const Texture2D &)
72 Renderer::Push push(renderer);
73 renderer.set_shader_program(&shprog, &shdata);
74 renderer.set_texture("source", &color_buf, &nearest_sampler);
75 renderer.set_texture("curve", &curve, &linear_sampler);
79 void ColorCurve::set_debug_name(const string &name)
82 shdata.set_debug_name(name+" [UBO]");
83 curve.set_debug_name(name+"/curve.tex1d");
90 ColorCurve::Template::Template():
91 exposure_adjust(0.0f),
92 brightness_response(0.4f),
97 ColorCurve *ColorCurve::Template::create(unsigned, unsigned) const
99 RefPtr<ColorCurve> colorcurve = new ColorCurve();
100 colorcurve->set_exposure_adjust(exposure_adjust);
101 colorcurve->set_brightness_response(brightness_response);
103 colorcurve->set_srgb();
105 colorcurve->set_gamma(gamma);
106 return colorcurve.release();
110 ColorCurve::Template::Loader::Loader(Template &t):
111 DataFile::DerivedObjectLoader<Template, PostProcessor::Template::Loader>(t)
113 add("brightness_response", &Template::brightness_response);
114 add("exposure_adjust", &Template::exposure_adjust);
115 add("gamma", &Loader::gamma);
116 add("srgb", &Loader::srgb);
119 void ColorCurve::Template::Loader::gamma(float g)
125 void ColorCurve::Template::Loader::srgb()