From 3f14653e536c6c4b4bb9e4d0a6b2ec0dfeadc665 Mon Sep 17 00:00:00 2001
From: LaG1924 <lag1924@gmail.com>
Date: Sun, 21 Nov 2021 19:49:04 +0500
Subject: Added gbuffer visualization

---
 cwd/assets/altcraft/shaders/frag/light.fs | 30 ++++++++++++++++++++++++++----
 src/Render.cpp                            | 16 ++++++++++++++++
 src/Render.hpp                            |  1 +
 src/RenderConfigs.cpp                     |  1 +
 src/RenderConfigs.hpp                     |  8 ++++++++
 5 files changed, 52 insertions(+), 4 deletions(-)

diff --git a/cwd/assets/altcraft/shaders/frag/light.fs b/cwd/assets/altcraft/shaders/frag/light.fs
index 12ab841..6d05884 100644
--- a/cwd/assets/altcraft/shaders/frag/light.fs
+++ b/cwd/assets/altcraft/shaders/frag/light.fs
@@ -11,18 +11,40 @@ uniform sampler2D light;
 uniform sampler2D depthStencil;
 
 uniform float dayTime;
+uniform int renderBuff;
 
 void main() {
     vec4 c = texture(color, uv);
     vec4 n = texture(normal, uv);
     vec4 ac = texture(addColor, uv);
-    vec4 an = texture(light, uv);
+    vec4 l = texture(light, uv);
     float d = 1.0f - texture(depthStencil, uv).r;
 
-    float faceLight = an.r;
-    float skyLight = an.g;
+    float faceLight = l.r;
+    float skyLight = l.g;
     float lightLevel = clamp(faceLight + skyLight * dayTime, 0.2f, 1.0f);
     vec3 faceColor = mix(ac.rgb * lightLevel, vec3(1,1,1) * lightLevel, float(ac.rgb == vec3(0,0,0)));
 
-    fragColor = vec4(c.rgb * faceColor, 1.0f);
+    vec4 finalColor = vec4(c.rgb * faceColor, 1.0f);
+
+    switch(renderBuff) {
+        case 0:
+            fragColor = finalColor;
+            break;
+        case 1:
+            fragColor = c;
+            break;
+        case 2:
+            fragColor = n;
+            break;
+        case 3:
+            fragColor = ac;
+            break;
+        case 4:
+            fragColor = l;
+            break;
+        case 5:
+            fragColor = vec4(d, d, d, 1.0f);
+            break;
+    }
 }
diff --git a/src/Render.cpp b/src/Render.cpp
index 48114b0..148ec27 100644
--- a/src/Render.cpp
+++ b/src/Render.cpp
@@ -335,6 +335,22 @@ void Render::HandleEvents() {
                         break;
                     }
 
+                    case SDL_SCANCODE_F9: {
+                        if (sdlKeyMods & KMOD_CTRL) {
+                            renderBuff = 0;
+                        } else if (sdlKeyMods & KMOD_SHIFT) {
+                            renderBuff--;
+                            if (renderBuff < 0)
+                                renderBuff = 0;
+                        } else {
+                            renderBuff++;
+                            if (renderBuff > gbuffer->GetMaxRenderBuffers())
+                                renderBuff = 0;
+                        }
+                        gbuffer->SetRenderBuff(renderBuff);
+                        break;
+                    }
+
                     default:
                         break;
                 }
diff --git a/src/Render.hpp b/src/Render.hpp
index 379ca66..8bdcd63 100644
--- a/src/Render.hpp
+++ b/src/Render.hpp
@@ -48,6 +48,7 @@ class Render {
     Rml::Context* rmlContext;
     unsigned short sdlKeyMods = 0;
     bool hideRml = false;
+    size_t renderBuff = 0;
 
 	void SetMouseCapture(bool IsCaptured);
 
diff --git a/src/RenderConfigs.cpp b/src/RenderConfigs.cpp
index 86418c2..2867bc6 100644
--- a/src/RenderConfigs.cpp
+++ b/src/RenderConfigs.cpp
@@ -68,6 +68,7 @@ Gbuffer::Gbuffer(size_t geomW, size_t geomH, size_t lightW, size_t lightH) {
     lightPPC->AddStaticTexture("light", light);
     lightPPC->AddStaticTexture("depthStencil", depthStencil);
     lightPPC->AddShaderParameter("dayTime", Gal::Type::Float);
+    lightPPC->AddShaderParameter("renderBuff", Gal::Type::Int32);
 
     lightPPC->SetVertexShader(gal->LoadVertexShader(vertexSource));
     lightPPC->SetPixelShader(gal->LoadPixelShader(pixelSource));
diff --git a/src/RenderConfigs.hpp b/src/RenderConfigs.hpp
index 94e96bb..9b535ca 100644
--- a/src/RenderConfigs.hpp
+++ b/src/RenderConfigs.hpp
@@ -41,4 +41,12 @@ public:
     void SetDayTime(float dayTime) {
         lightPipeline->SetShaderParameter("dayTime", dayTime);
     }
+
+    int GetMaxRenderBuffers() {
+        return 5;
+    }
+
+    void SetRenderBuff(int renderBuff) {
+        lightPipeline->SetShaderParameter("renderBuff", renderBuff);
+    }
 };
-- 
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