1，支持 bundle 加载图片，2 ，支持透明图片，3，支持设置指定位置大小

BFFramework/Classes/PQGPUImage/akfilters/PQImageFilter.swift

@@ -40,6 +40,10 @@ open class PQImageFilter: PQBaseFilter {
 //        print("mSticker path : \(String(describing: mSticker!.locationPath))")
 
         newImage = UIImage(contentsOfFile: documensDirectory + sticker.locationPath)
+        //支持 bundle 加载图片
+        if(newImage == nil){
+            newImage = UIImage().BF_Image(named: sticker.locationPath)
+        }
 
         // 如果是预览时 对原图进行缩放处理
         if !isExport {
@@ -136,9 +140,21 @@ open class PQImageFilter: PQBaseFilter {
             imageTexture = PQGPUImageTools.setupTexture(image: newImage!.cgImage!)
         }
 
+        
         let texturePropertiesimagetwo = InputTextureProperties(textureCoordinates: textureCoordinates, texture: imageTexture)
 
-        let verticesPoint: [GLfloat] = PQGPUImageTools.getVerticesPoint(sticker: mSticker!, textureSize: newImage!.size, cannvasSize: inputSize)
+        var verticesPoint: [GLfloat] = PQGPUImageTools.getVerticesPoint(sticker: mSticker!, textureSize: newImage!.size, cannvasSize: inputSize)
+        
+        //如果设置过大小位置，使用设置值，比如水印
+        if(stickerInfo?.materialPosition?.width != 0){
+            verticesPoint = PQGPUImageTools.computeVertices(viewSize: CGSize.init(width: CGFloat(inputSize.width), height: CGFloat(inputSize.height)), _bounds: CGRect.init(x: 0, y: 0, width: stickerInfo?.materialPosition?.width ?? 0, height: stickerInfo?.materialPosition?.height ?? 0))
+        }
+        
+        // 设置融合模式支持 alpha
+        glEnable(GLenum(GL_DEPTH_TEST))
+        glEnable(GLenum(GL_BLEND))
+        glBlendFunc(GLenum(GL_SRC_ALPHA), GLenum(GL_ONE_MINUS_SRC_ALPHA))
+        
         renderQuadWithShader(shader,
                              uniformSettings: uniformSettings,
                              vertexBufferObject: PQGPUImageTools.NXGenerateVBO(for: verticesPoint),