Examples with Canvas android.graphics.Canvas used on opensource projects

Example 11 with Canvas

use of android.graphics.Canvas in project android-gif-drawable by koral--.

the class PlaceholderDrawingSurfaceTextureListener method onSurfaceTextureAvailable.

@Override
public void onSurfaceTextureAvailable(SurfaceTexture surfaceTexture, int width, int height) {
    final Surface surface = new Surface(surfaceTexture);
    final Canvas canvas = surface.lockCanvas(null);
    mDrawer.onDrawPlaceholder(canvas);
    surface.unlockCanvasAndPost(canvas);
    surface.release();
}

Example 12 with Canvas

use of android.graphics.Canvas in project Lazy by l123456789jy.

the class BitmapUtil method getBitmapFromView.

/**
     * 从View获取Bitmap
     *
     * @param view View
     * @return Bitmap
     */
public static Bitmap getBitmapFromView(View view) {
    Bitmap bitmap = Bitmap.createBitmap(view.getWidth(), view.getHeight(), Config.ARGB_8888);
    Canvas canvas = new Canvas(bitmap);
    view.layout(view.getLeft(), view.getTop(), view.getRight(), view.getBottom());
    view.draw(canvas);
    return bitmap;
}

Example 13 with Canvas

use of android.graphics.Canvas in project Lazy by l123456789jy.

the class BitmapUtil method lumAndHueAndSaturation.

/**
     * 亮度、色相、饱和度处理
     *
     * @param bitmap          原图
     * @param lumValue        亮度值
     * @param hueValue        色相值
     * @param saturationValue 饱和度值
     * @return 亮度、色相、饱和度处理后的图片
     */
public static Bitmap lumAndHueAndSaturation(Bitmap bitmap, int lumValue, int hueValue, int saturationValue) {
    // 计算出符合要求的饱和度值
    float newSaturationValue = saturationValue * 1.0F / 127;
    // 计算出符合要求的亮度值
    float newlumValue = lumValue * 1.0F / 127;
    // 计算出符合要求的色相值
    float newHueValue = (hueValue - 127) * 1.0F / 127 * 180;
    // 创建一个颜色矩阵并设置其饱和度
    ColorMatrix colorMatrix = new ColorMatrix();
    // 设置饱和度值
    colorMatrix.setSaturation(newSaturationValue);
    // 设置亮度值
    colorMatrix.setScale(newlumValue, newlumValue, newlumValue, 1);
    // 控制让红色区在色轮上旋转的角度
    colorMatrix.setRotate(0, newHueValue);
    // 控制让绿红色区在色轮上旋转的角度
    colorMatrix.setRotate(1, newHueValue);
    // 控制让蓝色区在色轮上旋转的角度
    colorMatrix.setRotate(2, newHueValue);
    // 创建一个画笔并设置其颜色过滤器
    Paint paint = new Paint();
    paint.setColorFilter(new ColorMatrixColorFilter(colorMatrix));
    // 创建一个新的图片并创建画布
    Bitmap newBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);
    Canvas canvas = new Canvas(newBitmap);
    // 将原图使用给定的画笔画到画布上
    canvas.drawBitmap(bitmap, 0, 0, paint);
    return newBitmap;
}

Example 14 with Canvas

use of android.graphics.Canvas in project Lazy by l123456789jy.

the class BitmapUtil method combineImagesToSameSize.

/**
     * 合并
     * @param bgd 后景Bitmap
     * @param fg 前景Bitmap
     * @return 合成后Bitmap
     */
public static Bitmap combineImagesToSameSize(Bitmap bgd, Bitmap fg) {
    Bitmap bmp;
    int width = bgd.getWidth() < fg.getWidth() ? bgd.getWidth() : fg.getWidth();
    int height = bgd.getHeight() < fg.getHeight() ? bgd.getHeight() : fg.getHeight();
    if (fg.getWidth() != width && fg.getHeight() != height) {
        fg = zoom(fg, width, height);
    }
    if (bgd.getWidth() != width && bgd.getHeight() != height) {
        bgd = zoom(bgd, width, height);
    }
    bmp = Bitmap.createBitmap(width, height, Config.ARGB_8888);
    Paint paint = new Paint();
    paint.setXfermode(new PorterDuffXfermode(Mode.SRC_ATOP));
    Canvas canvas = new Canvas(bmp);
    canvas.drawBitmap(bgd, 0, 0, null);
    canvas.drawBitmap(fg, 0, 0, paint);
    return bmp;
}

Example 15 with Canvas

use of android.graphics.Canvas in project QuickReturn by lawloretienne.

the class RoundedDrawable method drawableToBitmap.

public static Bitmap drawableToBitmap(Drawable drawable) {
    if (drawable instanceof BitmapDrawable) {
        return ((BitmapDrawable) drawable).getBitmap();
    }
    Bitmap bitmap;
    int width = Math.max(drawable.getIntrinsicWidth(), 1);
    int height = Math.max(drawable.getIntrinsicHeight(), 1);
    try {
        bitmap = Bitmap.createBitmap(width, height, Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        drawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        drawable.draw(canvas);
    } catch (Exception e) {
        e.printStackTrace();
        bitmap = null;
    }
    return bitmap;
}