made speech bubble a bit nicer

src/de/tudarmstadt/informatik/hostage/ui/fragment/opengl/ThreatIndicatorGLRenderer.java

@@ -49,7 +49,7 @@ public class ThreatIndicatorGLRenderer implements Renderer {
 		mNextThreatLevel = threatLevel;
 	}
 
-	public static boolean showSpeechBubble = false;
+	public static boolean showSpeechBubble = true;
 
 	/**
 	 * Match the background color of the view holding this renderer
@@ -130,7 +130,7 @@ public class ThreatIndicatorGLRenderer implements Renderer {
 		GLES20.glGenBuffers(1, buffers, 0); // buffer names
 		mQuadVertexBuffer = buffers[0];
 
-		font = new GLFont("fonts/laCartoonerie.png", "fonts/laCartoonerie.bin");
+		font = new GLFont("fonts/komika.png", "fonts/komika.bin");
 		
 		mModelview = new float[16];
 		Matrix.setIdentityM(mModelview, 0);
@@ -162,11 +162,11 @@ public class ThreatIndicatorGLRenderer implements Renderer {
 				+ "}",
 				  "precision mediump float;"
 				+ "uniform sampler2D colormap;" // fragment
-				+ "uniform vec3 color;"
+				+ "uniform vec4 color;"
 				+ "varying vec2 vertexTexCoord;"
 				+ "void main() {"
 				+ " vec4 texel = texture2D(colormap, vertexTexCoord);"
-				+ "	gl_FragColor = vec4(color * texel.rgb, texel.a);"
+				+ "	gl_FragColor = color * texel;"
 				+ "}");
 	}
 
@@ -331,7 +331,7 @@ public class ThreatIndicatorGLRenderer implements Renderer {
 			int colorUniformLoc = GLES20.glGetUniformLocation(mTexturedProgram, "color");
 			GLES20.glUniform2f(resolutionUniformLoc, 1024.0f, 1024.0f);
 			GLES20.glUniform1i(textureUniformLoc, 0);
-			GLES20.glUniform3f(colorUniformLoc, 1.0f, 1.0f, 1.0f);
+			GLES20.glUniform4f(colorUniformLoc, 1.0f, 1.0f, 1.0f, 0.8f);
 			String message = "???";
 			switch (mNextThreatLevel) {
 				case NOT_MONITORING:
@@ -349,12 +349,14 @@ public class ThreatIndicatorGLRenderer implements Renderer {
 			}
 			float textWidth = font.getTextWidth(message);
 			float textHeight = 40.0f;
-			float bubbleSize = textWidth + 100.0f;
+			float bubbleDiameter = 256.0f;
+			float bubbleWidth = textWidth + bubbleDiameter;
+			float bubbleHeight = bubbleDiameter;
 			float y = 0.75f * 1024.0f + 32.0f * (float) Math.sin(2.0 * animTime);
 			float x = 0.5f * 1024.0f + 16.0f * (float) Math.cos(1.0 * animTime);
-			drawTexturedQuad(speechBubbleTexture, x - 0.5f * bubbleSize, y - 0.25f * bubbleSize,
-					bubbleSize, 0.5f * bubbleSize);
-			GLES20.glUniform3f(colorUniformLoc, 0.0f, 0.0f, 0.0f);
+			drawSpeechBubble(speechBubbleTexture, x - 0.5f * bubbleWidth, y - 0.5f * bubbleHeight,
+					bubbleWidth, bubbleHeight);
+			GLES20.glUniform4f(colorUniformLoc, 0.0f, 0.0f, 0.0f, 1.0f);
 			font.drawText(mTexturedProgram, message, x - 0.5f * textWidth,
 					y - 0.5f * textHeight);
 			GLES20.glUseProgram(0);
@@ -387,18 +389,31 @@ public class ThreatIndicatorGLRenderer implements Renderer {
 	}
 	
 	// some helper functions
-	private void drawTexturedQuad(int texture, float x, float y, float w, float h) {
-		int vertexCount = 4;
+	private void drawSpeechBubble(int texture, float x, float y, float w, float h) {
+		float bubbleRadius = 128.0f;
+		int vertexCount = 8;
 		int vertexSize = (2+2)*4; // size in bytes
 		FloatBuffer buffer = ByteBuffer.allocateDirect(vertexCount * vertexSize).order(ByteOrder.nativeOrder()).asFloatBuffer();
-		buffer.put(x); buffer.put(y);
-		buffer.put(0.0f); buffer.put(0.0f);
-		buffer.put(x+w); buffer.put(y);
-		buffer.put(1.0f); buffer.put(0.0f);
 		buffer.put(x); buffer.put(y+h);
 		buffer.put(0.0f); buffer.put(1.0f);
+		buffer.put(x); buffer.put(y);
+		buffer.put(0.0f); buffer.put(0.0f);
+
+		buffer.put(x+bubbleRadius); buffer.put(y+h);
+		buffer.put(0.5f); buffer.put(1.0f);
+		buffer.put(x+bubbleRadius); buffer.put(y);
+		buffer.put(0.5f); buffer.put(0.0f);
+
+		buffer.put(x+w-bubbleRadius); buffer.put(y+h);
+		buffer.put(0.5f); buffer.put(1.0f);
+		buffer.put(x+w-bubbleRadius); buffer.put(y);
+		buffer.put(0.5f); buffer.put(0.0f);
+
 		buffer.put(x+w); buffer.put(y+h);
 		buffer.put(1.0f); buffer.put(1.0f);
+		buffer.put(x+w); buffer.put(y);
+		buffer.put(1.0f); buffer.put(0.0f);
+
 		buffer.position(0); // rewind
 
 		GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, texture);