Re-written flat render pipeline to support transforms

FlatRender now supports arbitrary transforms
GLSL 1.40 is now used in shaders

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

@@ -1,13 +1,26 @@
-#version 120
+#version 140
 
-uniform ivec2 maskStart;
-uniform ivec2 maskEnd;
+uniform int maskCount;
+
+uniform vec2 masks[3 * 2 * 16];
+
+bool isInMaskPrimitive(int primitive) {
+	vec2 origin = masks[3 * primitive + 0];
+	vec2 width  = masks[3 * primitive + 1];
+	vec2 height = masks[3 * primitive + 2];
+	
+	vec2 current = gl_FragCoord.xy - origin;
+	
+	mat2 matrix = mat2(width, height);
+	vec2 relative = inverse(matrix) * current;
+	
+	return relative.x >= 0 && relative.y >= 0 && relative.x + relative.y <= 1;
+}
 
 void applyMask() {
-	if (
-			gl_FragCoord.x < maskStart.x || gl_FragCoord.x >= maskEnd.x ||
-			gl_FragCoord.y < maskStart.y || gl_FragCoord.y >= maskEnd.y
-	) {
-		discard;
+	for (int i = 0; i < maskCount; ++i) {
+		if (!(isInMaskPrimitive(2 * i + 0) || isInMaskPrimitive(2 * i + 1))) {
+			discard;
+		}
 	}
-}
+}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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