Added color multiplier stack to shaders, fixed dynamic font colors

- ShapeFragment.glsl now declares uniformColorMultiplier, which is used
as an additional fragment color multiplier (independent from VBAs)
  - Managed with a new stack by ShapeRenderHelper
- Fixed dynamic font colors

src/main/java/ru/windcorp/progressia/client/graphics/font/SpriteTypeface.java

@@ -117,13 +117,13 @@ public abstract class SpriteTypeface extends Typeface {
 		return output.set(resultWidth, height);
 	}
 
-	private Shape createCharShape(char c, Vec4 color) {
+	private Shape createCharShape(char c) {
 		return new Shape(
 				Usage.STATIC, getProgram(),
 				Faces.createRectangle(
 						getProgram(),
 						getTexture(c),
-						color,
+						Colors.WHITE,
 						Vectors.ZERO_3,
 						new Vec3(getWidth(c), 0, 0),
 						new Vec3(0, getHeight(), 0),
@@ -182,7 +182,7 @@ public abstract class SpriteTypeface extends Typeface {
 		private Shape getShape(char c) {
 			Shape shape = charShapes.get(c);
 			if (shape == null) {
-				shape = createCharShape(c, this.color);
+				shape = createCharShape(c);
 				charShapes.put(c, shape);
 			}
 			return shape;
@@ -195,14 +195,18 @@ public abstract class SpriteTypeface extends Typeface {
 		@Override
 		public void drawChar(char c, Vec4 color, Mat4 transform) {
 			workspace.renderer.pushTransform().mul(transform);
+			workspace.renderer.pushColorMultiplier().mul(color);
 			getShape(c).render(workspace.renderer);
+			workspace.renderer.popColorMultiplier();
 			workspace.renderer.popTransform();
 		}
 		
 		@Override
 		public void drawRectangle(Vec2 size, Vec4 color, Mat4 transform) {
 			workspace.renderer.pushTransform().mul(transform).scale(size.x, size.y, 1);
+			workspace.renderer.pushColorMultiplier().mul(color);
 			unitLine.render(workspace.renderer);
+			workspace.renderer.popColorMultiplier();
 			workspace.renderer.popTransform();
 		}
 

src/main/java/ru/windcorp/progressia/client/graphics/model/ShapeRenderHelper.java

@@ -18,18 +18,26 @@
 package ru.windcorp.progressia.client.graphics.model;
 
 import glm.mat._4.Mat4;
+import glm.vec._4.Vec4;
+import ru.windcorp.progressia.client.graphics.Colors;
 import ru.windcorp.progressia.common.util.StashingStack;
 
 public class ShapeRenderHelper {
 	
 	protected static final int TRANSFORM_STACK_SIZE = 64;
+	protected static final int COLOR_MULTIPLIER_STACK_SIZE = TRANSFORM_STACK_SIZE;
 	
 	protected final StashingStack<Mat4> transformStack = new StashingStack<>(
 			TRANSFORM_STACK_SIZE, Mat4::new
 	);
 	
+	protected final StashingStack<Vec4> colorMultiplierStack = new StashingStack<>(
+			COLOR_MULTIPLIER_STACK_SIZE, Vec4::new
+	);
+	
 	{
 		transformStack.push().identity();
+		colorMultiplierStack.push().set(Colors.WHITE);
 	}
 	
 	public Mat4 pushTransform() {
@@ -49,9 +57,28 @@ public class ShapeRenderHelper {
 		return getTransform();
 	}
 
+	public Vec4 pushColorMultiplier() {
+		Vec4 previous = colorMultiplierStack.getHead();
+		return colorMultiplierStack.push().set(previous);
+	}
+	
+	public void popColorMultiplier() {
+		colorMultiplierStack.removeHead();
+	}
+	
+	public Vec4 getColorMultiplier() {
+		return colorMultiplierStack.getHead();
+	}
+	
+	public Vec4 getFinalColorMultiplier() {
+		return getColorMultiplier();
+	}
+	
 	public void reset() {
 		transformStack.removeAll();
 		transformStack.push().identity();
+		colorMultiplierStack.removeAll();
+		colorMultiplierStack.push().set(Colors.WHITE);
 	}
 
 }

src/main/java/ru/windcorp/progressia/client/graphics/model/ShapeRenderProgram.java

@@ -52,15 +52,17 @@ public class ShapeRenderProgram extends Program {
 			"Shape.fragment.glsl";
 	
 	private static final String
-			FINAL_TRANSFORM_UNIFORM_NAME   = "finalTransform",
+			FINAL_TRANSFORM_UNIFORM_NAME             = "finalTransform",
-			POSITIONS_ATTRIBUTE_NAME       = "inputPositions",
+			POSITIONS_ATTRIBUTE_NAME                 = "inputPositions",
-			COLOR_MULTIPLER_ATTRIBUTE_NAME = "inputColorMultiplier",
+			UNIFORM_COLOR_MULTIPLER_ATTRIBUTE_NAME   = "uniformColorMultiplier",
-			TEXTURE_COORDS_ATTRIBUTE_NAME  = "inputTextureCoords",
+			ATTRIBUTE_COLOR_MULTIPLER_ATTRIBUTE_NAME = "inputColorMultiplier",
-			USE_TEXTURE_UNIFORM_NAME       = "useTexture",
+			TEXTURE_COORDS_ATTRIBUTE_NAME            = "inputTextureCoords",
-			TEXTURE_SLOT_UNIFORM_NAME      = "textureSlot";
+			USE_TEXTURE_UNIFORM_NAME                 = "useTexture",
+			TEXTURE_SLOT_UNIFORM_NAME                = "textureSlot";
 	
 	private final Uniform4Matrix finalTransformUniform;
 	private final AttributeVertexArray positionsAttribute;
+	private final Uniform4Float colorsUniform;
 	private final AttributeVertexArray colorsAttribute;
 	private final AttributeVertexArray textureCoordsAttribute;
 	private final Uniform1Int useTextureUniform;
@@ -85,8 +87,11 @@ public class ShapeRenderProgram extends Program {
 		this.positionsAttribute =
 				getAttribute(POSITIONS_ATTRIBUTE_NAME).asVertexArray();
 		
+		this.colorsUniform =
+				getUniform(UNIFORM_COLOR_MULTIPLER_ATTRIBUTE_NAME).as4Float();
+		
 		this.colorsAttribute =
-				getAttribute(COLOR_MULTIPLER_ATTRIBUTE_NAME).asVertexArray();
+				getAttribute(ATTRIBUTE_COLOR_MULTIPLER_ATTRIBUTE_NAME).asVertexArray();
 		
 		this.textureCoordsAttribute =
 				getAttribute(TEXTURE_COORDS_ATTRIBUTE_NAME).asVertexArray();
@@ -140,6 +145,7 @@ public class ShapeRenderProgram extends Program {
 
 	protected void configure(ShapeRenderHelper helper) {
 		finalTransformUniform.set(helper.getFinalTransform());
+		colorsUniform.set(helper.getFinalColorMultiplier());
 	}
 
 	protected int bindVertices(VertexBufferObject vertices) {

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

@@ -1,5 +1,7 @@
 #version 120
 
+uniform vec4 uniformColorMultiplier;
+
 varying vec4 varyingColorMultiplier;
 varying vec2 varyingTextureCoords;
 
@@ -17,6 +19,7 @@ void applyTexture() {
 
 void applyColorMultiplier() {
 	gl_FragColor *= varyingColorMultiplier;
+	gl_FragColor *= uniformColorMultiplier;
 }
 
 void applyAlpha() {