-#include <cmath>
-#include "color.h"
-#include "colorcurve.h"
-#include "mesh.h"
-#include "renderer.h"
-#include "shader.h"
-#include "texture2d.h"
-
-using namespace std;
-
-namespace Msp {
-namespace GL {
-
-ColorCurve::ColorCurve():
- shprog("colorcurve.glsl"),
- quad(get_fullscreen_quad())
-{
- shdata.uniform("source", 0);
- shdata.uniform("curve", 1);
-
- curve.storage(LUMINANCE, 256);
- curve.set_min_filter(LINEAR);
- curve.set_wrap(CLAMP_TO_EDGE);
- texturing.attach(1, curve);
-
- set_exposure_adjust(0.0f);
- set_brightness_response(0.4f);
- set_linear();
-}
-
-void ColorCurve::set_exposure_adjust(float e)
-{
- shdata.uniform("exposure", pow(2.0f, e));
-}
-
-void ColorCurve::set_brightness_response(float b)
-{
- if(b<=0 || b>1)
- throw invalid_argument("ColorCurve::set_brightness_response");
- float t = (b<1 ? pow(b, 1/(1-b)) : 0.0f);
- shdata.uniform("brightness_response", b, t, pow(t, b));
-}
-
-void ColorCurve::set_peak(float)
-{
-}
-
-void ColorCurve::set_brightness(float b)
-{
- set_brightness_response(1/b);
-}
-
-void ColorCurve::set_gamma(float g)
-{
- if(g<0.1 || g>10)
- throw invalid_argument("ColorCurve::set_gamma");
-
- unsigned char curve_data[256];
- for(unsigned i=0; i<256; ++i)
- curve_data[i] = pow(i/255.0f, 1/g)*255+0.5f;
- curve.image(0, LUMINANCE, UNSIGNED_BYTE, curve_data);
-}
-
-void ColorCurve::set_srgb()
-{
- unsigned char curve_data[256];
- curve_data[0] = 0;
- for(unsigned i=1; i<256; ++i)
- curve_data[i] = to_srgb(i/255.0f)*255+0.5f;
- curve.image(0, LUMINANCE, UNSIGNED_BYTE, curve_data);
-}
-
-void ColorCurve::set_linear()
-{
- unsigned char curve_data[256];
- for(unsigned i=0; i<256; ++i)
- curve_data[i] = i;
- curve.image(0, LUMINANCE, UNSIGNED_BYTE, curve_data);
-}
-
-void ColorCurve::render(Renderer &renderer, const Texture2D &color_buf, const Texture2D &)
-{
- texturing.attach(0, color_buf);
-
- Renderer::Push push(renderer);
- renderer.set_shader_program(&shprog, &shdata);
- renderer.set_texturing(&texturing);
- quad.draw(renderer);
-}
-
-
-ColorCurve::Template::Template():
- exposure_adjust(0.0f),
- brightness_response(0.4f),
- gamma(1.0f),
- srgb(false)
-{ }
-
-ColorCurve *ColorCurve::Template::create(unsigned, unsigned) const
-{
- RefPtr<ColorCurve> colorcurve = new ColorCurve;
- colorcurve->set_exposure_adjust(exposure_adjust);
- colorcurve->set_brightness_response(brightness_response);
- if(srgb)
- colorcurve->set_srgb();
- else
- colorcurve->set_gamma(gamma);
- return colorcurve.release();
-}
-
-
-ColorCurve::Template::Loader::Loader(Template &t):
- DataFile::DerivedObjectLoader<Template, PostProcessor::Template::Loader>(t)
-{
- add("brightness_response", &Template::brightness_response);
- add("exposure_adjust", &Template::exposure_adjust);
- add("gamma", &Loader::gamma);
- add("srgb", &Loader::srgb);
-}
-
-void ColorCurve::Template::Loader::gamma(float g)
-{
- obj.gamma = g;
- obj.srgb = false;
-}
-
-void ColorCurve::Template::Loader::srgb()
-{
- obj.srgb = true;
-}
-
-} // namespace GL
-} // namespace Msp