Regression fix: changes to GL blend function broke anything with alph…

…a < 1.0

- need to reset blend function to correct default values
- `dstAlpha` and `dstRGB` were misspelled in blend effect
- layers effect needs to specify blend function components

effects/seriously.blend.js

@@ -97,9 +97,9 @@
 			if (nativeMode && gl) {
 				topOpts.blendEquation = gl[nativeMode[0]];
 				topOpts.srcRGB = gl[nativeMode[1]];
-				topOpts.destRGB = gl[nativeMode[2]];
+				topOpts.dstRGB = gl[nativeMode[2]];
 				topOpts.srcAlpha = gl[nativeMode[3]];
-				topOpts.destAlpha = gl[nativeMode[4]];
+				topOpts.dstAlpha = gl[nativeMode[4]];
 			}
 		}
 

effects/seriously.layers.js

@@ -150,6 +150,16 @@
 		};
 
 		return {
+			initialize: function (initialize) {
+				var gl = this.gl;
+				initialize();
+
+				topOpts.blendEquation = gl.FUNC_ADD;
+				topOpts.srcRGB = gl.SRC_ALPHA;
+				topOpts.dstRGB = gl.ONE_MINUS_SRC_ALPHA;
+				topOpts.srcAlpha = gl.SRC_ALPHA;
+				topOpts.dstAlpha = gl.DST_ALPHA;
+			},
 			commonShader: true,
 			shader: function (inputs, shaderSource) {
 				shaderSource.vertex = [

seriously.js

@@ -1159,9 +1159,9 @@
 
 				gl.blendFuncSeparate(
 					options && options.srcRGB || gl.ONE,
-					options && options.dstRGB || gl.ONE_MINUS_SRC_ALPHA,
-					options && (options.srcAlpha || options.srcRGB) || gl.SRC_ALPHA,
-					options && (options.dstAlpha || options.dstRGB) || gl.ONE
+					options && options.dstRGB || gl.ZERO,
+					options && (options.srcAlpha || options.srcRGB) || gl.ONE,
+					options && (options.dstAlpha || options.dstRGB) || gl.ZERO
 				);
 				gl.blendEquation(options && options.blendEquation || gl.FUNC_ADD);
 			} else {