From be808181b2c84358b232e4a32d1a6dd9dd6659ed Mon Sep 17 00:00:00 2001
From: LaG1924 <lag1924@gmail.com>
Date: Sat, 11 Dec 2021 20:44:40 +0500
Subject: Optimized GBuffer size

---
 cwd/assets/altcraft/shaders/frag/entity.fs   |  8 ++------
 cwd/assets/altcraft/shaders/frag/face.fs     |  7 ++-----
 cwd/assets/altcraft/shaders/frag/fwd_face.fs |  1 +
 cwd/assets/altcraft/shaders/frag/fwd_sky.fs  |  1 +
 cwd/assets/altcraft/shaders/frag/light.fs    | 13 +++++++++----
 cwd/assets/altcraft/shaders/frag/sky.fs      |  8 ++++----
 cwd/assets/altcraft/shaders/frag/ssao.fs     | 12 +++++++++---
 cwd/assets/altcraft/shaders/vert/entity.vs   |  4 +---
 cwd/assets/altcraft/shaders/vert/face.vs     |  4 +---
 cwd/assets/altcraft/shaders/vert/light.vs    | 22 ----------------------
 cwd/assets/altcraft/shaders/vert/quad.vs     |  1 +
 cwd/assets/altcraft/shaders/vert/rml.vs      |  1 +
 cwd/assets/altcraft/shaders/vert/sky.vs      |  1 +
 13 files changed, 33 insertions(+), 50 deletions(-)
 delete mode 100644 cwd/assets/altcraft/shaders/vert/light.vs

(limited to 'cwd/assets/altcraft/shaders')

diff --git a/cwd/assets/altcraft/shaders/frag/entity.fs b/cwd/assets/altcraft/shaders/frag/entity.fs
index 31e1a7c..813a9af 100644
--- a/cwd/assets/altcraft/shaders/frag/entity.fs
+++ b/cwd/assets/altcraft/shaders/frag/entity.fs
@@ -1,19 +1,15 @@
 #version 330 core
 
-in vec4 entityWorldPos;
-
 layout (location = 0) out vec4 color;
 layout (location = 1) out vec4 normal;
-layout (location = 2) out vec4 worldPos;
-layout (location = 3) out vec4 addColor;
-layout (location = 4) out vec4 light;
+layout (location = 2) out vec4 addColor;
+layout (location = 3) out vec4 light;
 
 uniform vec3 entityColor;
 
 void main() {
     color = vec4(entityColor, 1.0f);
     normal = vec4(0.0f, 0.0f, 0.0f, 1.0f);
-    worldPos = entityWorldPos;
     addColor = vec4(1.0f);
     light = vec4(1.0f, 1.0f, 0.0f, 1.0f);
 }
diff --git a/cwd/assets/altcraft/shaders/frag/face.fs b/cwd/assets/altcraft/shaders/frag/face.fs
index 65b7d15..ebda304 100644
--- a/cwd/assets/altcraft/shaders/frag/face.fs
+++ b/cwd/assets/altcraft/shaders/frag/face.fs
@@ -1,6 +1,5 @@
 #version 330 core
 
-in vec4 faceWorldPos;
 in vec3 faceTextureUv;
 in vec3 faceAddColor;
 in vec3 faceNormal;
@@ -8,9 +7,8 @@ in vec2 faceLight;
 
 layout (location = 0) out vec4 color;
 layout (location = 1) out vec4 normal;
-layout (location = 2) out vec4 worldPos;
-layout (location = 3) out vec4 addColor;
-layout (location = 4) out vec4 light;
+layout (location = 2) out vec4 addColor;
+layout (location = 3) out vec4 light;
 
 uniform sampler2DArray textureAtlas;
 
@@ -21,7 +19,6 @@ void main() {
 
     color = vec4(col.rgb, 1.0f);
     normal = vec4(faceNormal, 1.0f);
-    worldPos = faceWorldPos;
     addColor = vec4(faceAddColor, 1.0f);
     light = vec4(faceLight / 15.0f, 0.0f, 1.0f);
 }
diff --git a/cwd/assets/altcraft/shaders/frag/fwd_face.fs b/cwd/assets/altcraft/shaders/frag/fwd_face.fs
index deb8341..12deab8 100644
--- a/cwd/assets/altcraft/shaders/frag/fwd_face.fs
+++ b/cwd/assets/altcraft/shaders/frag/fwd_face.fs
@@ -13,6 +13,7 @@ uniform sampler2DArray textureAtlas;
 layout (std140) uniform Globals {
     mat4 projView;
     mat4 proj;
+    mat4 invProj;
     mat4 view;
     uvec2 viewportSize;
     vec4 ssaoKernels[64];
diff --git a/cwd/assets/altcraft/shaders/frag/fwd_sky.fs b/cwd/assets/altcraft/shaders/frag/fwd_sky.fs
index b6185fd..9f278b2 100644
--- a/cwd/assets/altcraft/shaders/frag/fwd_sky.fs
+++ b/cwd/assets/altcraft/shaders/frag/fwd_sky.fs
@@ -7,6 +7,7 @@ out vec4 fragColor;
 layout (std140) uniform Globals {
     mat4 projView;
     mat4 proj;
+    mat4 invProj;
     mat4 view;
     uvec2 viewportSize;
     vec4 ssaoKernels[64];
diff --git a/cwd/assets/altcraft/shaders/frag/light.fs b/cwd/assets/altcraft/shaders/frag/light.fs
index c7e7254..3876388 100644
--- a/cwd/assets/altcraft/shaders/frag/light.fs
+++ b/cwd/assets/altcraft/shaders/frag/light.fs
@@ -7,7 +7,6 @@ in vec2 uv;
 uniform sampler2D depthStencil;
 uniform sampler2D color;
 uniform sampler2D normal;
-uniform sampler2D worldPos;
 uniform sampler2D addColor;
 uniform sampler2D light;
 uniform sampler2D ssao;
@@ -18,6 +17,7 @@ uniform bool applySsao;
 layout (std140) uniform Globals {
     mat4 projView;
     mat4 proj;
+    mat4 invProj;
     mat4 view;
     uvec2 viewportSize;
     vec4 ssaoKernels[64];
@@ -26,16 +26,21 @@ layout (std140) uniform Globals {
     float gamma;
 };
 
+vec3 RecoverViewWorldPos(vec2 screenPos, float depth) {
+    vec4 viewPos = invProj * vec4(screenPos * 2.0 - 1.0, depth * 2.0 - 1.0, 1.0);
+    return viewPos.xyz / viewPos.w;
+}
+
 void main() {
     vec4 c = texture(color, uv);
     vec4 n = texture(normal, uv);
     n += 1.0f;
     n /= 2.0f;
 
-    vec4 wp = texture(worldPos, uv);
     vec4 ac = texture(addColor, uv);
     vec4 l = texture(light, uv);
-    float d = (1.0f - texture(depthStencil, uv).r) * 16.0f;
+    float depth = texture(depthStencil, uv).r;
+    float d = (1.0f - depth) * 16.0f;
     vec4 s = texture(ssao, uv);
 
     float faceLight = l.r;
@@ -62,7 +67,7 @@ void main() {
             fragColor = n;
             break;
         case 3:
-            fragColor = wp;
+            fragColor = vec4(RecoverViewWorldPos(uv, depth), 1.0f);
             break;
         case 4:
             fragColor = ac;
diff --git a/cwd/assets/altcraft/shaders/frag/sky.fs b/cwd/assets/altcraft/shaders/frag/sky.fs
index dc97440..f3830b8 100644
--- a/cwd/assets/altcraft/shaders/frag/sky.fs
+++ b/cwd/assets/altcraft/shaders/frag/sky.fs
@@ -4,13 +4,13 @@ in vec3 facePos;
 
 layout (location = 0) out vec4 color;
 layout (location = 1) out vec4 normal;
-layout (location = 2) out vec4 worldPos;
-layout (location = 3) out vec4 addColor;
-layout (location = 4) out vec4 light;
+layout (location = 2) out vec4 addColor;
+layout (location = 3) out vec4 light;
 
 layout (std140) uniform Globals {
     mat4 projView;
     mat4 proj;
+    mat4 invProj;
     mat4 view;
     uvec2 viewportSize;
     vec4 ssaoKernels[64];
@@ -65,7 +65,7 @@ void main() {
     color += vec4(Sun().rgb, 1.0f);
     color += vec4(Moon().rgb, 1.0f);
     normal = vec4(0.0f, 0.0f, 0.0f, 1.0f);
-    worldPos = vec4(0.0f, 0.0f, 0.0f, 1.0f);
     addColor = vec4(1.0f);
     light = vec4(1.0f, 1.0f, 0.0f, 1.0f);
+    gl_FragDepth = 1.0f;
 }
diff --git a/cwd/assets/altcraft/shaders/frag/ssao.fs b/cwd/assets/altcraft/shaders/frag/ssao.fs
index 4ed93fd..662852f 100644
--- a/cwd/assets/altcraft/shaders/frag/ssao.fs
+++ b/cwd/assets/altcraft/shaders/frag/ssao.fs
@@ -5,7 +5,7 @@ out vec4 fragColor;
 in vec2 uv;
 
 uniform sampler2D normal;
-uniform sampler2D worldPos;
+uniform sampler2D depthStencil;
 uniform sampler2D ssaoNoise;
 
 uniform int ssaoSamples;
@@ -13,6 +13,7 @@ uniform int ssaoSamples;
 layout (std140) uniform Globals {
     mat4 projView;
     mat4 proj;
+    mat4 invProj;
     mat4 view;
     uvec2 viewportSize;
     vec4 ssaoKernels[64];
@@ -26,9 +27,14 @@ const int kernelSize = 64;
 const float radius = 0.5f;
 const float bias = 0.025f;
 
+vec3 RecoverViewWorldPos(vec2 screenPos, float depth) {
+    vec4 viewPos = invProj * vec4(screenPos * 2.0 - 1.0, depth * 2.0 - 1.0, 1.0);
+    return viewPos.xyz / viewPos.w;
+}
+
 void main() {
     vec3 normal = texture(normal, uv).xyz;
-    vec3 fragPos = texture(worldPos, uv).xyz;
+    vec3 fragPos = RecoverViewWorldPos(uv, texture(depthStencil, uv).r);
     vec2 noiseUv = uv * viewportSize / noiseScale;
 
     vec3 randomVec = texture(ssaoNoise, noiseUv).xyz;
@@ -49,7 +55,7 @@ void main() {
         offset.xyz /= offset.w;
         offset.xyz  = offset.xyz * 0.5 + 0.5;
 
-        float sampleDepth = texture(worldPos, offset.xy).z;
+        float sampleDepth = RecoverViewWorldPos(offset.xy, texture(depthStencil, offset.xy).r).z;
         float rangeCheck = smoothstep(0.0, 1.0, radius / abs(fragPos.z - sampleDepth));
         occlusion += (sampleDepth >= samplePos.z + bias ? 1.0 : 0.0) * rangeCheck;
     }
diff --git a/cwd/assets/altcraft/shaders/vert/entity.vs b/cwd/assets/altcraft/shaders/vert/entity.vs
index f90fbc1..8cc7f69 100644
--- a/cwd/assets/altcraft/shaders/vert/entity.vs
+++ b/cwd/assets/altcraft/shaders/vert/entity.vs
@@ -2,13 +2,12 @@
 
 in vec3 pos;
 
-out vec4 entityWorldPos;
-
 uniform mat4 model;
 
 layout (std140) uniform Globals {
     mat4 projView;
     mat4 proj;
+    mat4 invProj;
     mat4 view;
     uvec2 viewportSize;
     vec4 ssaoKernels[64];
@@ -19,5 +18,4 @@ layout (std140) uniform Globals {
 
 void main() {
     gl_Position = projView * model * vec4(pos, 1);
-    entityWorldPos = view * model * vec4(pos, 1.0f);
 }
diff --git a/cwd/assets/altcraft/shaders/vert/face.vs b/cwd/assets/altcraft/shaders/vert/face.vs
index a85b2c6..3e6adf7 100644
--- a/cwd/assets/altcraft/shaders/vert/face.vs
+++ b/cwd/assets/altcraft/shaders/vert/face.vs
@@ -8,7 +8,6 @@ in float animation;
 in vec3 color;
 in vec2 light;
 
-out vec4 faceWorldPos;
 out vec3 faceTextureUv;
 out vec3 faceNormal;
 out vec3 faceAddColor;
@@ -17,6 +16,7 @@ out vec2 faceLight;
 layout (std140) uniform Globals {
     mat4 projView;
     mat4 proj;
+    mat4 invProj;
     mat4 view;
     uvec2 viewportSize;
     vec4 ssaoKernels[64];
@@ -28,8 +28,6 @@ layout (std140) uniform Globals {
 void main() {
     gl_Position = projView * vec4(pos[gl_VertexID], 1.0f);
 
-    faceWorldPos = view * vec4(pos[gl_VertexID], 1.0f);
-
     faceTextureUv = vec3(uv[gl_VertexID], uvLayer);
     faceTextureUv.y -= (uv[2].y - uv[0].y) * trunc(mod(globalTime * 4.0f, animation));
 
diff --git a/cwd/assets/altcraft/shaders/vert/light.vs b/cwd/assets/altcraft/shaders/vert/light.vs
deleted file mode 100644
index 118ea5b..0000000
--- a/cwd/assets/altcraft/shaders/vert/light.vs
+++ /dev/null
@@ -1,22 +0,0 @@
-#version 330 core
-
-in vec2 pos;
-in vec2 uvPos;
-
-out vec2 uv;
-
-layout (std140) uniform Globals {
-    mat4 projView;
-    mat4 proj;
-    mat4 view;
-    uvec2 viewportSize;
-    vec4 ssaoKernels[64];
-    float globalTime;
-    float dayTime;
-    float gamma;
-};
-
-void main() {
-    gl_Position = vec4(pos.x, pos.y, 0.0, 1.0);
-    uv = uvPos;
-}
diff --git a/cwd/assets/altcraft/shaders/vert/quad.vs b/cwd/assets/altcraft/shaders/vert/quad.vs
index 118ea5b..9add76d 100644
--- a/cwd/assets/altcraft/shaders/vert/quad.vs
+++ b/cwd/assets/altcraft/shaders/vert/quad.vs
@@ -8,6 +8,7 @@ out vec2 uv;
 layout (std140) uniform Globals {
     mat4 projView;
     mat4 proj;
+    mat4 invProj;
     mat4 view;
     uvec2 viewportSize;
     vec4 ssaoKernels[64];
diff --git a/cwd/assets/altcraft/shaders/vert/rml.vs b/cwd/assets/altcraft/shaders/vert/rml.vs
index c61a4a0..897f49d 100644
--- a/cwd/assets/altcraft/shaders/vert/rml.vs
+++ b/cwd/assets/altcraft/shaders/vert/rml.vs
@@ -12,6 +12,7 @@ uniform vec2 translation;
 layout (std140) uniform Globals {
     mat4 projView;
     mat4 proj;
+    mat4 invProj;
     mat4 view;
     uvec2 viewportSize;
     vec4 ssaoKernels[64];
diff --git a/cwd/assets/altcraft/shaders/vert/sky.vs b/cwd/assets/altcraft/shaders/vert/sky.vs
index 7043584..c618852 100644
--- a/cwd/assets/altcraft/shaders/vert/sky.vs
+++ b/cwd/assets/altcraft/shaders/vert/sky.vs
@@ -9,6 +9,7 @@ uniform mat4 model;
 layout (std140) uniform Globals {
     mat4 projView;
     mat4 proj;
+    mat4 invProj;
     mat4 view;
     uvec2 viewportSize;
     vec4 ssaoKernels[64];
-- 
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