Create color space and tonemapping render options

engine/core/src/debug.cpp

@@ -103,6 +103,10 @@ void draw_renderer() {
     ImGui::Text("Options");
     ImGui::Separator();
     
+    ImGui::ComboEnum("Display Color Space", &render_options.display_color_space);
+    ImGui::ComboEnum("Tonemapping", &render_options.tonemapping);
+    ImGui::DragFloat("Exposure", &render_options.exposure, 0.1f);
+    
     bool should_recompile = false;
     
     float render_scale = render_options.render_scale;

engine/renderer/include/render_options.hpp

@@ -10,6 +10,16 @@ enum class ShadowFilter {
     PCSS
 };
 
+enum class DisplayColorSpace {
+    Linear = 0,
+    SRGB = 1,
+};
+
+enum class TonemapOperator {
+    Linear = 0,
+    ExposureBased = 1
+};
+
 #if defined(PLATFORM_TVOS) || defined(PLATFORM_IOS)
 constexpr bool default_enable_ibl = false;
 constexpr bool default_enable_normal_mapping = false;
@@ -25,6 +35,10 @@ constexpr int default_shadow_resolution = 2048;
 #endif
 
 struct RenderOptions {
+    DisplayColorSpace display_color_space = DisplayColorSpace::SRGB;
+    TonemapOperator tonemapping = TonemapOperator::Linear;
+    float exposure = 1.0f;
+    
     bool dynamic_resolution = false;
     double render_scale = 1.0f;
     

engine/renderer/src/renderer.cpp

@@ -73,8 +73,7 @@ struct SceneInformation {
 };
 
 struct PostPushConstants {
-    Vector4 viewport;
-    Vector4 options;
+    Vector4 viewport, options, transform_ops;
 };
 
 struct UIPushConstant {
@@ -300,7 +299,9 @@ void Renderer::render(Scene* scene, int index) {
         PostPushConstants pc;
         pc.options.x = render_options.enable_aa;
         pc.options.y = fade;
-        pc.options.z = 1.0;
+        pc.options.z = render_options.exposure;
+        pc.transform_ops.x = (int)render_options.display_color_space;
+        pc.transform_ops.y = (int)render_options.tonemapping;
         
         const auto [width, height] = render_extent;
         pc.viewport = Vector4(1.0f / static_cast<float>(width), 1.0f / static_cast<float>(height), width, height);

shaders/post.frag.glsl

@@ -8,6 +8,7 @@
 layout(std430, push_constant, binding = 4) uniform PushConstant {
     vec4 viewport;
     vec4 options;
+    vec4 transform_ops;
 };
 
 #include "smaa.glsl"
@@ -63,6 +64,13 @@ void main() {
     vec3 sobelColor = vec3(0, 1, 1);
     
     vec3 hdrColor = sceneColor; // fading removed
-    hdrColor = vec3(1.0) - exp(-hdrColor * options.z); // exposure
-    outColor = vec4(from_linear_to_srgb(hdrColor) + (sobelColor * sobel), 1.0);
+    
+    vec3 transformed_color = hdrColor;
+    if(transform_ops.x == 1)
+        transformed_color = from_linear_to_srgb(hdrColor);
+    
+    if(transform_ops.y == 1)
+        transformed_color = vec3(1.0) - exp(-hdrColor * options.z);
+    
+    outColor = vec4(transformed_color + (sobelColor * sobel), 1.0);
 }

shaders/post.vert.glsl

@@ -8,8 +8,7 @@
 layout(std430, push_constant, binding = 4) uniform readonlPushConstant {
     vec4 viewport;
     float fade;
-    bool performGammaCorrection;
-    bool performAA;
+    vec4 transform_ops;
 };
 
 #include "smaa.glsl"