PAGSurface readPixels失败

[krislyy]

Discussed in #77

^{Originally posted by krislyy January 26, 2022}

private void pagToGif() {
        // pag player
        PAGComposition composition = makeComposition();
        int height = composition.height();
        int width = composition.width();
        PAGSurface surface = PAGSurface.MakeOffScreen(width, height);
        if (surface == null) return;
        PAGPlayer player = new PAGPlayer();
        player.setComposition(composition);
        player.setSurface(surface);
        player.setProgress(0);
        // byte buffer
        ByteBuffer buffer = ByteBuffer.allocateDirect(width * height * 4)
                .order(ByteOrder.nativeOrder());
        buffer.clear();
        // 开始导出
        int totalFrames = (int) (composition.duration() * composition.frameRate() / 1000000);
        for (int i = 0; i < totalFrames; i++) {
            generateSurfaceFrame(player, composition, i);
            surface.readPixels(buffer);
            Bitmap bitmap = BitmapFactory.decodeByteArray(buffer.array(), 0, buffer.capacity());
            buffer.clear();
        }
    }

PAGSurface的readPixels函数返回的buffer一直空的，想问下Android需要特殊设置什么才能拿到当前渲染的到surface上图片呢？

[domchen]

已在 #77 中回复。