Switched back to GLSL 1.20 because my laptop is a brick

src/main/java/ru/windcorp/optica/client/graphics/backend/shaders/CombinedShader.java

@@ -44,7 +44,7 @@ public class CombinedShader extends Shader {
 	}
 	
 	private static String combine(String[] resources) {
-		StringBuilder accumulator = new StringBuilder("#version 140\n");
+		StringBuilder accumulator = new StringBuilder("#version 120\n");
 		
 		for (String resourceName : resources) {
 			Resource resource = getShaderResource(resourceName);

src/main/resources/assets/shaders/Flat.fragment.glsl

@@ -1,9 +1,20 @@
-#version 140
+#version 120
 
 uniform int maskCount;
 
 uniform vec2 masks[3 * 2 * 16];
 
+mat2 inverse(mat2 matrix) {
+	mat2 result = mat2(
+		+matrix[1][1], -matrix[1][0],
+		-matrix[0][1], +matrix[0][0]
+	);
+	
+	float det = matrix[0][0] * matrix[1][1] - matrix[1][0] * matrix[0][1];
+	
+	return result / det;
+}
+
 bool isInMaskPrimitive(int primitive) {
 	vec2 origin = masks[3 * primitive + 0];
 	vec2 width  = masks[3 * primitive + 1];

src/main/resources/assets/shaders/Flat.vertex.glsl

@@ -1,4 +1,4 @@
-#version 140
+#version 120
 
 void flatTransferToFragment() {
 	shapeTransferToFragment();

src/main/resources/assets/shaders/FlatDefault.fragment.glsl

@@ -1,4 +1,4 @@
-#version 140
+#version 120
 
 void main(void) {
 	applyTexture();

src/main/resources/assets/shaders/FlatDefault.vertex.glsl

@@ -1,4 +1,4 @@
-#version 140
+#version 120
 
 void main(void) {
 	gl_Position = applyFinalTransform(vec4(inputPositions, 1.0));

src/main/resources/assets/shaders/Shape.fragment.glsl

@@ -1,4 +1,4 @@
-#version 140
+#version 120
 
 varying vec3 varyingColorMultiplier;
 varying vec2 varyingTextureCoords;

src/main/resources/assets/shaders/Shape.vertex.glsl

@@ -1,4 +1,4 @@
-#version 140
+#version 120
 
 attribute vec3 inputPositions;
 

src/main/resources/assets/shaders/World.fragment.glsl

@@ -1,4 +1,4 @@
-#version 140
+#version 120
 
 varying vec3 varyingNormals;
 

src/main/resources/assets/shaders/World.vertex.glsl

@@ -1,4 +1,4 @@
-#version 140
+#version 120
 
 attribute vec3 inputNormals;
 varying vec3 varyingNormals;

src/main/resources/assets/shaders/WorldDefault.fragment.glsl

@@ -1,4 +1,4 @@
-#version 140
+#version 120
 
 void main(void) {
 	applyTexture();

src/main/resources/assets/shaders/WorldDefault.vertex.glsl

@@ -1,4 +1,4 @@
-#version 140
+#version 120
 
 void main(void) {
 	gl_Position = applyFinalTransform(vec4(inputPositions, 1.0));