android - キャンバスへの 2D 描画アルファが非常に遅い

Question

ライブ壁紙に半透明のカラーオーバーレイを追加しようとしています。何を試しても、ロード時間が非常に遅くなります。drawARGB を試し、ペイントでアルファを設定し、ピクセルごとにアルファビットマップを作成しました。これらの方法はすべて、読み込み時間が遅くなります。私のコードは次のとおりです。

public void draw()
        {

            long borderLoadTime = 0;
            long drawStart = 0;
            long drawEnd = 0;
            long whileLoopEnd = 0;
            long overlayStart = 0;
            long overlayEnd = 0;
            long holderTime = 0;
            long lockTime = 0;
            long start = System.currentTimeMillis();
            long drawCounter = 0;

            Canvas c = new Canvas();

            c = holder.lockCanvas();

            long canvasLoadTime = System.currentTimeMillis();

            if (c != null)
            {
                if (borderToggle)
                    c.drawRGB(InfinityService.BORDER_RED,
                            InfinityService.BORDER_GREEN,
                            InfinityService.BORDER_BLUE);
                else
                    c.drawColor(Color.BLACK);

                borderLoadTime = System.currentTimeMillis();

                synchronized (grid)
                {
                    lockTime = System.currentTimeMillis();
                    for (GridRow row : grid.getImageGrid().values())
                    {
                        for (Box box : row.getRow().values())
                        {

                            drawStart = System.currentTimeMillis();

                            if (box.getImgLeft() < getWidth()
                                    && box.getImgTop() < getHeight()
                                    && box.getImgRight() > 0
                                    && box.getImgBottom() > 0)
                            {
                                c.drawBitmap(serviceContext.getImages().get(box.getPhoto()), 
                                        Math.round(box.getImgLeft()), 
                                        Math.round(box.getImgTop()), p);
                            }

                            drawEnd = System.currentTimeMillis();
                            drawCounter += drawEnd - drawStart;
                        }
                    }

                    whileLoopEnd = System.currentTimeMillis();
                }

                overlayStart = System.currentTimeMillis();

                if (overlayToggle)
                    c.drawARGB(InfinityService.OVERLAY_ALPHA,
                            InfinityService.OVERLAY_RED,
                            InfinityService.OVERLAY_GREEN,
                            InfinityService.OVERLAY_BLUE);

                overlayEnd = System.currentTimeMillis();

                holder.unlockCanvasAndPost(c);

                holderTime = System.currentTimeMillis();
            }

            Log.d(InfinityService.TAG, "CANVAS LOAD: "
                    + (canvasLoadTime - start) + " ms");
            Log.d(InfinityService.TAG, "BORDER LOAD: "
                    + (borderLoadTime - canvasLoadTime) + " ms");
            Log.d(InfinityService.TAG, "BITMAP DRAW TIME: " + drawCounter
                    + " ms");
            Log.d(InfinityService.TAG, "LOOP TIME: "
                    + ((whileLoopEnd - lockTime) - drawCounter) + " ms");
            Log.d(InfinityService.TAG, "OVERLAY LOAD: "
                    + (overlayEnd - overlayStart) + " ms");
            Log.d(InfinityService.TAG, "HOLDER UNLOCK: "
                    + (holderTime - overlayEnd) + " ms");
            Log.d(InfinityService.TAG,
                    "LOCK TIME: "
                            + ((overlayStart - borderLoadTime) - (whileLoopEnd - lockTime))
                            + " ms");
            Log.d(InfinityService.TAG,
                    "------------------------------------");

        }

描画されたフレームのログエントリの一部を次に示します。drawARGB がこのように遅い時間になっていることに注目してください。さらに、キャンバスのロックとロック解除の呼び出しも、完了するまでに長い時間がかかります。

11-10 16:09:34.803: D/InfinityService(10233): CANVAS LOAD: 0 ms
11-10 16:09:34.803: D/InfinityService(10233): BORDER LOAD: 1 ms
11-10 16:09:34.803: D/InfinityService(10233): BITMAP DRAW TIME: 4 ms
11-10 16:09:34.803: D/InfinityService(10233): LOOP TIME: 0 ms
11-10 16:09:34.803: D/InfinityService(10233): OVERLAY LOAD: 8 ms
11-10 16:09:34.803: D/InfinityService(10233): HOLDER UNLOCK: 1 ms
11-10 16:09:34.803: D/InfinityService(10233): LOCK TIME: 0 ms
11-10 16:09:34.803: D/InfinityService(10233): ------------------------------------
11-10 16:09:34.873: D/InfinityService(10233): CANVAS LOAD: 1 ms
11-10 16:09:34.873: D/InfinityService(10233): BORDER LOAD: 0 ms
11-10 16:09:34.873: D/InfinityService(10233): BITMAP DRAW TIME: 4 ms
11-10 16:09:34.873: D/InfinityService(10233): LOOP TIME: 0 ms
11-10 16:09:34.873: D/InfinityService(10233): OVERLAY LOAD: 17 ms
11-10 16:09:34.873: D/InfinityService(10233): HOLDER UNLOCK: 3 ms
11-10 16:09:34.873: D/InfinityService(10233): LOCK TIME: 0 ms
11-10 16:09:34.873: D/InfinityService(10233): ------------------------------------
11-10 16:09:34.953: D/InfinityService(10233): CANVAS LOAD: 1 ms
11-10 16:09:34.953: D/InfinityService(10233): BORDER LOAD: 2 ms
11-10 16:09:34.953: D/InfinityService(10233): BITMAP DRAW TIME: 3 ms
11-10 16:09:34.963: D/InfinityService(10233): LOOP TIME: 3 ms
11-10 16:09:34.963: D/InfinityService(10233): OVERLAY LOAD: 24 ms
11-10 16:09:34.963: D/InfinityService(10233): HOLDER UNLOCK: 3 ms
11-10 16:09:34.963: D/InfinityService(10233): LOCK TIME: 0 ms
11-10 16:09:34.963: D/InfinityService(10233): ------------------------------------
11-10 16:09:35.044: D/InfinityService(10233): CANVAS LOAD: 0 ms
11-10 16:09:35.044: D/InfinityService(10233): BORDER LOAD: 1 ms
11-10 16:09:35.044: D/InfinityService(10233): BITMAP DRAW TIME: 4 ms
11-10 16:09:35.044: D/InfinityService(10233): LOOP TIME: 2 ms
11-10 16:09:35.044: D/InfinityService(10233): OVERLAY LOAD: 24 ms
11-10 16:09:35.044: D/InfinityService(10233): HOLDER UNLOCK: 4 ms
11-10 16:09:35.054: D/InfinityService(10233): LOCK TIME: 0 ms
11-10 16:09:35.054: D/InfinityService(10233): ------------------------------------
11-10 16:09:35.164: D/InfinityService(10233): CANVAS LOAD: 1 ms
11-10 16:09:35.164: D/InfinityService(10233): BORDER LOAD: 1 ms
11-10 16:09:35.164: D/InfinityService(10233): BITMAP DRAW TIME: 5 ms
11-10 16:09:35.164: D/InfinityService(10233): LOOP TIME: 2 ms
11-10 16:09:35.164: D/InfinityService(10233): OVERLAY LOAD: 43 ms
11-10 16:09:35.164: D/InfinityService(10233): HOLDER UNLOCK: 15 ms
11-10 16:09:35.164: D/InfinityService(10233): LOCK TIME: 0 ms
11-10 16:09:35.164: D/InfinityService(10233): ------------------------------------
11-10 16:09:35.234: D/InfinityService(10233): CANVAS LOAD: 0 ms
11-10 16:09:35.234: D/InfinityService(10233): BORDER LOAD: 1 ms
11-10 16:09:35.234: D/InfinityService(10233): BITMAP DRAW TIME: 2 ms
11-10 16:09:35.234: D/InfinityService(10233): LOOP TIME: 1 ms
11-10 16:09:35.234: D/InfinityService(10233): OVERLAY LOAD: 18 ms
11-10 16:09:35.234: D/InfinityService(10233): HOLDER UNLOCK: 2 ms
11-10 16:09:35.234: D/InfinityService(10233): LOCK TIME: 0 ms
11-10 16:09:35.234: D/InfinityService(10233): ------------------------------------
11-10 16:09:35.304: D/InfinityService(10233): CANVAS LOAD: 0 ms
11-10 16:09:35.304: D/InfinityService(10233): BORDER LOAD: 1 ms
11-10 16:09:35.304: D/InfinityService(10233): BITMAP DRAW TIME: 2 ms
11-10 16:09:35.304: D/InfinityService(10233): LOOP TIME: 1 ms
11-10 16:09:35.304: D/InfinityService(10233): OVERLAY LOAD: 19 ms
11-10 16:09:35.304: D/InfinityService(10233): HOLDER UNLOCK: 1 ms
11-10 16:09:35.304: D/InfinityService(10233): LOCK TIME: 0 ms
11-10 16:09:35.304: D/InfinityService(10233): ------------------------------------
11-10 16:09:35.374: D/InfinityService(10233): CANVAS LOAD: 0 ms
11-10 16:09:35.374: D/InfinityService(10233): BORDER LOAD: 1 ms
11-10 16:09:35.374: D/InfinityService(10233): BITMAP DRAW TIME: 3 ms
11-10 16:09:35.374: D/InfinityService(10233): LOOP TIME: 0 ms
11-10 16:09:35.374: D/InfinityService(10233): OVERLAY LOAD: 7 ms
11-10 16:09:35.374: D/InfinityService(10233): HOLDER UNLOCK: 13 ms
11-10 16:09:35.374: D/InfinityService(10233): LOCK TIME: 0 ms
11-10 16:09:35.374: D/InfinityService(10233): ------------------------------------
11-10 16:09:35.444: D/InfinityService(10233): CANVAS LOAD: 1 ms
11-10 16:09:35.444: D/InfinityService(10233): BORDER LOAD: 0 ms
11-10 16:09:35.444: D/InfinityService(10233): BITMAP DRAW TIME: 3 ms
11-10 16:09:35.444: D/InfinityService(10233): LOOP TIME: 0 ms
11-10 16:09:35.444: D/InfinityService(10233): OVERLAY LOAD: 8 ms
11-10 16:09:35.444: D/InfinityService(10233): HOLDER UNLOCK: 11 ms
11-10 16:09:35.444: D/InfinityService(10233): LOCK TIME: 1 ms
11-10 16:09:35.444: D/InfinityService(10233): ------------------------------------
11-10 16:09:35.614: D/InfinityService(10233): CANVAS LOAD: 1 ms
11-10 16:09:35.614: D/InfinityService(10233): BORDER LOAD: 0 ms
11-10 16:09:35.614: D/InfinityService(10233): BITMAP DRAW TIME: 4 ms
11-10 16:09:35.614: D/InfinityService(10233): LOOP TIME: 0 ms
11-10 16:09:35.614: D/InfinityService(10233): OVERLAY LOAD: 117 ms
11-10 16:09:35.614: D/InfinityService(10233): HOLDER UNLOCK: 9 ms
11-10 16:09:35.614: D/InfinityService(10233): LOCK TIME: 0 ms
11-10 16:09:35.614: D/InfinityService(10233): ------------------------------------
11-10 16:09:35.844: D/InfinityService(10233): CANVAS LOAD: 0 ms
11-10 16:09:35.844: D/InfinityService(10233): BORDER LOAD: 1 ms
11-10 16:09:35.844: D/InfinityService(10233): BITMAP DRAW TIME: 3 ms
11-10 16:09:35.844: D/InfinityService(10233): LOOP TIME: 0 ms
11-10 16:09:35.844: D/InfinityService(10233): OVERLAY LOAD: 67 ms
11-10 16:09:35.844: D/InfinityService(10233): HOLDER UNLOCK: 108 ms
11-10 16:09:35.844: D/InfinityService(10233): LOCK TIME: 0 ms
11-10 16:09:35.844: D/InfinityService(10233): ------------------------------------

アルファカラーオーバーレイを使用すると、両方のデバイスでパフォーマンスが大幅に低下することに気付きました。

これは、2D android キャンバス描画の欠点として避けられないのでしょうか? この問題に関してopenGLは役立ちますか?

android - キャンバスへの 2D 描画アルファが非常に遅い

0 に答える 0

Related

Reference