Make possible to tweak exposure/lwhite in adm

data/shaders/tonemap.frag

@@ -2,6 +2,8 @@
 
 uniform sampler2D tex;
 uniform sampler2D logluminancetex;
+uniform float exposure = .09;
+uniform float Lwhite = 1.;
 
 in vec2 uv;
 out vec4 FragColor;
@@ -9,8 +11,7 @@ out vec4 FragColor;
 vec3 getCIEYxy(vec3 rgbColor);
 vec3 getRGBFromCIEXxy(vec3 YxyColor);
 
-float exposure = .09;
-float Lwhite = 1.;
+
 float delta = .0001;
 float saturation = 1.;
 

src/graphics/irr_driver.hpp

@@ -99,6 +99,8 @@ private:
     Shaders              *m_shaders;
     /** Wind. */
     Wind                 *m_wind;
+    float                m_exposure;
+    float                m_lwhite;
     /** RTTs. */
     RTT                *m_rtts;
     /** Shadow importance. */
@@ -160,6 +162,26 @@ public:
             return 120;
     }
 
+    float getExposure() const
+    {
+        return m_exposure;
+    }
+
+    void setExposure(float v)
+    {
+        m_exposure = v;
+    }
+
+    float getLwhite() const
+    {
+      return m_lwhite;
+    }
+
+    void setLwhite(float v)
+    {
+        m_lwhite = v;
+    }
+
 private:
     std::vector<VideoMode> m_modes;
 

src/graphics/post_processing.cpp

@@ -530,7 +530,7 @@ static void toneMap(GLuint fbo, GLuint rtt)
     glBindVertexArray(FullScreenShader::ToneMapShader::vao);
     setTexture(0, rtt, GL_NEAREST, GL_NEAREST);
     setTexture(1, irr_driver->getRenderTargetTexture(RTT_LOG_LUMINANCE), GL_NEAREST, GL_NEAREST_MIPMAP_NEAREST);
-    FullScreenShader::ToneMapShader::setUniforms(0, 1);
+    FullScreenShader::ToneMapShader::setUniforms(irr_driver->getExposure(), irr_driver->getLwhite(), 0, 1);
 
     glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
 }

src/graphics/shaders.cpp

@@ -2069,6 +2069,8 @@ namespace FullScreenShader
     GLuint ToneMapShader::Program;
     GLuint ToneMapShader::uniform_tex;
     GLuint ToneMapShader::uniform_logluminancetex;
+    GLuint ToneMapShader::uniform_exposure;
+    GLuint ToneMapShader::uniform_lwhite;
     GLuint ToneMapShader::vao;
 
     void ToneMapShader::init()
@@ -2080,13 +2082,17 @@ namespace FullScreenShader
             GL_FRAGMENT_SHADER, file_manager->getAsset("shaders/tonemap.frag").c_str());
         uniform_tex = glGetUniformLocation(Program, "tex");
         uniform_logluminancetex = glGetUniformLocation(Program, "logluminancetex");
+        uniform_exposure = glGetUniformLocation(Program, "exposure");
+        uniform_lwhite = glGetUniformLocation(Program, "Lwhite");
         vao = createVAO(Program);
     }
 
-    void ToneMapShader::setUniforms(unsigned TU_tex, unsigned TU_loglum)
+    void ToneMapShader::setUniforms(float exposure, float Lwhite, unsigned TU_tex, unsigned TU_loglum)
     {
         glUniform1i(uniform_tex, TU_tex);
         glUniform1i(uniform_logluminancetex, TU_loglum);
+        glUniform1f(uniform_exposure, exposure);
+        glUniform1f(uniform_lwhite, Lwhite);
     }
 
     GLuint DepthOfFieldShader::Program;

src/graphics/shaders.hpp

@@ -524,11 +524,11 @@ class ToneMapShader
 {
 public:
     static GLuint Program;
-    static GLuint uniform_tex, uniform_logluminancetex;
+    static GLuint uniform_tex, uniform_logluminancetex, uniform_exposure, uniform_lwhite;
     static GLuint vao;
 
     static void init();
-    static void setUniforms(unsigned TU_tex, unsigned TU_logluminance);
+    static void setUniforms(float exposure, float Lwhite, unsigned TU_tex, unsigned TU_logluminance);
 };
 
 class DepthOfFieldShader

src/states_screens/dialogs/debug_slider.cpp

@@ -26,6 +26,7 @@
 #include "modes/world.hpp"
 #include "states_screens/state_manager.hpp"
 #include "utils/translation.hpp"
+#include "graphics/irr_driver.hpp"
 
 using namespace GUIEngine;
 
@@ -73,6 +74,10 @@ GUIEngine::EventPropagation DebugSliderDialog::processEvent(const std::string& e
     {
         int value = getWidget<SpinnerWidget>("value_slider")->getValue();
         Log::info("DebugSlider", "Value for <%s> : %i", m_id.c_str(), value);
+        if (m_id == "lwhite")
+            irr_driver->setLwhite(value / 10.);
+        if (m_id == "exposure")
+            irr_driver->setExposure(value / 100.);
         return GUIEngine::EVENT_BLOCK;
     }