From 31f67803b9cdaea8c3d9dff1c0761af8db093480 Mon Sep 17 00:00:00 2001
From: Bixilon <bixilon@bixilon.de>
Date: Wed, 24 Mar 2021 19:20:30 +0100
Subject: [PATCH] rendering: workaround for mesa drivers

---
 .../rendering/shader/chunk_fragment.glsl        | 17 +++++++++++++++--
 .../minosoft/rendering/shader/hud_fragment.glsl | 17 ++++++++++++++++-
 2 files changed, 31 insertions(+), 3 deletions(-)

diff --git a/src/main/resources/assets/minosoft/rendering/shader/chunk_fragment.glsl b/src/main/resources/assets/minosoft/rendering/shader/chunk_fragment.glsl
index cf562b68a..d18f68f47 100644
--- a/src/main/resources/assets/minosoft/rendering/shader/chunk_fragment.glsl
+++ b/src/main/resources/assets/minosoft/rendering/shader/chunk_fragment.glsl
@@ -25,8 +25,21 @@ in vec4 passTintColor;
 
 uniform sampler2DArray textureArray[7];
 
+vec4 getTexture(uint textureId, vec3 textureCoordinates){
+    switch (textureId){
+        case 0u : return texture(textureArray[0], textureCoordinates);
+        case 1u: return texture(textureArray[1], textureCoordinates);
+        case 2u: return texture(textureArray[2], textureCoordinates);
+        case 3u: return texture(textureArray[3], textureCoordinates);
+        case 4u: return texture(textureArray[4], textureCoordinates);
+        case 5u: return texture(textureArray[5], textureCoordinates);
+        case 6u: return texture(textureArray[6], textureCoordinates);
+    }
+    return texture(textureArray[0], textureCoordinates);
+}
+
 void main() {
-    vec4 firstTexelColor = texture(textureArray[passFirstTextureIdIndex], passFirstTextureCoordinates);
+    vec4 firstTexelColor = getTexture(passFirstTextureIdIndex, passFirstTextureCoordinates);
     if (firstTexelColor.a == 0.0f) { // ToDo: This only works for alpha == 0. What about semi transparency? We would need to sort the faces, etc. See: https://learnopengl.com/Advanced-OpenGL/Blending
         discard;
     }
@@ -36,7 +49,7 @@ void main() {
         return;
     }
 
-    vec4 secondTexelColor = texture(textureArray[passSecondTextureIdIndex], passSecondTextureCoordinates);
+    vec4 secondTexelColor =  getTexture(passSecondTextureIdIndex, passSecondTextureCoordinates);
 
     if (secondTexelColor.a == 0.0f) {
         discard;
diff --git a/src/main/resources/assets/minosoft/rendering/shader/hud_fragment.glsl b/src/main/resources/assets/minosoft/rendering/shader/hud_fragment.glsl
index c4252482f..bf1712446 100644
--- a/src/main/resources/assets/minosoft/rendering/shader/hud_fragment.glsl
+++ b/src/main/resources/assets/minosoft/rendering/shader/hud_fragment.glsl
@@ -22,8 +22,23 @@ in vec4 passTintColor;
 
 uniform sampler2DArray textureArray[7];
 
+
+vec4 getTexture(uint textureId, vec3 textureCoordinates) { // ToDo: This method is just stupid, @see chunk_fragment.glsl
+    switch (textureId){
+        case 0u : return texture(textureArray[0], textureCoordinates);
+        case 1u: return texture(textureArray[1], textureCoordinates);
+        case 2u: return texture(textureArray[2], textureCoordinates);
+        case 3u: return texture(textureArray[3], textureCoordinates);
+        case 4u: return texture(textureArray[4], textureCoordinates);
+        case 5u: return texture(textureArray[5], textureCoordinates);
+        case 6u: return texture(textureArray[6], textureCoordinates);
+    }
+    return texture(textureArray[0], textureCoordinates);
+}
+
+
 void main() {
-    vec4 texelColor = texture(textureArray[passTextureIdIndex], passTextureCoordinates);
+    vec4 texelColor = getTexture(passTextureIdIndex, passTextureCoordinates);
 
     if (passTintColor.a == 1.0f && texelColor.a == 0) {
         discard;