图片的一些高级处理
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/** * 将给定资源ID的Drawable转换成Bitmap * @param context 上下文 * @param resId Drawable资源文件的ID * @return 新的Bitmap */ public Bitmap drawableToBitmap(Context context, int resId) { BitmapFactory.Options opt = new BitmapFactory.Options(); opt.inPreferredConfig = Bitmap.Config.RGB_565; opt.inPurgeable = true; opt.inInputShareable = true; InputStream is = context.getResources().openRawResource(resId); return BitmapFactory.decodeStream(is, null, opt); } /** * 圆角处理 * @param pixels 角度，度数越大圆角越大 * @return 转换成圆角后的图片 */ public Bitmap roundCorner(float pixels) { Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(output); Paint paint = new Paint(); Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); //创建一个同原图一样大小的矩形，用于把原图绘制到这个矩形上 RectF rectF = new RectF(rect); //创建一个精度更高的矩形，用于画出圆角效果 paint.setAntiAlias(true); canvas.drawARGB(0, 0, 0, 0); //涂上黑色全透明的底色 paint.setColor(0xff424242); //设置画笔的颜色为不透明的灰色 canvas.drawRoundRect(rectF, pixels, pixels, paint); //用给给定的画笔把给定的矩形以给定的圆角的度数画到画布 paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN)); canvas.drawBitmap(bitmap, rect, rect, paint); //用画笔paint将原图bitmap根据新的矩形重新绘制 return output; } /** * 倒影处理 * @param reflectionSpacing 原图与倒影之间的间距 * @return 加上倒影后的图片 */ public Bitmap reflection(int reflectionSpacing, int reflectionHeight) { int width = bitmap.getWidth(); int height = bitmap.getHeight();/* 获取倒影图片，并创建一张宽度与原图相同，但高度等于原图的高度加上间距加上倒影的高度的图片，并创建画布。画布分为上中下三部分，上：是原图；中：是原图与倒影的间距；下：是倒影 */ Bitmap reflectionImage = reverseByVertical(bitmap);// Bitmap bitmapWithReflection = Bitmap.createBitmap(width, height + reflectionSpacing + reflectionHeight, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(bitmapWithReflection);/* 将原图画到画布的上半部分，将倒影画到画布的下半部分，倒影与画布顶部的间距是原图的高度加上原图与倒影之间的间距 */ canvas.drawBitmap(bitmap, 0, 0, null); canvas.drawBitmap(reflectionImage, 0, height + reflectionSpacing, null); reflectionImage.recycle();/* 将倒影改成半透明，创建画笔，并设置画笔的渐变从半透明的白色到全透明的白色，然后再倒影上面画半透明效果 */ Paint paint = new Paint(); paint.setShader(new LinearGradient(0, bitmap.getHeight(), 0, bitmapWithReflection.getHeight() + reflectionSpacing, 0x70ffffff, 0x00ffffff, Shader.TileMode.CLAMP)); paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN)); canvas.drawRect(0, height+reflectionSpacing, width, bitmapWithReflection.getHeight() + reflectionSpacing, paint); return bitmapWithReflection; } /** * 倒影处理 * @return 加上倒影后的图片 */ public Bitmap reflection() { return reflection(4, bitmap.getHeight() / 2); } /** * 旋转处理 * @param angle 旋转角度 * @param px 旋转中心点在X轴的坐标 * @param py 旋转中心点在Y轴的坐标 * @return 旋转后的图片 */ public Bitmap rotate(float angle, float px, float py){ Matrix matrix = new Matrix(); matrix.postRotate(angle, px, py); return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, false); } /** * 旋转后处理 * @param angle 旋转角度 * @return 旋转后的图片 */ public Bitmap rotate(float angle){ Matrix matrix = new Matrix(); matrix.postRotate(angle); return Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, false); } /** * 饱和度处理 * @param saturationValue 新的饱和度值 * @return 改变了饱和度值之后的图片 */ public Bitmap saturation(int saturationValue){ //计算出符合要求的饱和度值 float newSaturationValue = saturationValue * 1.0F / 127; //创建一个颜色矩阵 ColorMatrix saturationColorMatrix = new ColorMatrix(); //设置饱和度值 saturationColorMatrix.setSaturation(newSaturationValue); //创建一个画笔并设置其颜色过滤器 Paint paint = new Paint(); paint.setColorFilter(new ColorMatrixColorFilter(saturationColorMatrix)); //创建一个新的图片并创建画布 Bitmap newBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.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; } /** * 亮度处理 * @param lumValue 新的亮度值 * @return 改变了亮度值之后的图片 */ public Bitmap lum(int lumValue){ //计算出符合要求的亮度值 float newlumValue = lumValue * 1.0F / 127; //创建一个颜色矩阵 ColorMatrix lumColorMatrix = new ColorMatrix(); //设置亮度值 lumColorMatrix.setScale(newlumValue, newlumValue, newlumValue, 1); //创建一个画笔并设置其颜色过滤器 Paint paint = new Paint(); paint.setColorFilter(new ColorMatrixColorFilter(lumColorMatrix)); //创建一个新的图片并创建画布 Bitmap newBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.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; } /** * 色相处理 * @param hueValue 新的色相值 * @return 改变了色相值之后的图片 */ public Bitmap hue(int hueValue){ //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 ColorMatrix hueColorMatrix = new ColorMatrix(); // 控制让红色区在色轮上旋转的角度 hueColorMatrix.setRotate(0, newHueValue); // 控制让绿红色区在色轮上旋转的角度 hueColorMatrix.setRotate(1, newHueValue); // 控制让蓝色区在色轮上旋转的角度 hueColorMatrix.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(hueColorMatrix)); //创建一个新的图片并创建画布 Bitmap newBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Bitmap.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; } /** * 亮度、色相、饱和度处理 * @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 Bitmap lumAndHueAndSaturation(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(), Bitmap.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; } /** * 怀旧效果处理 * @param bitmap 原图 * @return 怀旧效果处理后的图片 */ public Bitmap nostalgic(Bitmap bitmap) { int width = bitmap.getWidth(); int height = bitmap.getHeight(); Bitmap newBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); int pixColor = 0; int pixR = 0; int pixG = 0; int pixB = 0; int newR = 0; int newG = 0; int newB = 0; int[] pixels = new int[width * height]; bitmap.getPixels(pixels, 0, width, 0, 0, width, height); for (int i = 0; i < height; i++) { for (int k = 0; k < width; k++) { pixColor = pixels[width * i + k]; pixR = Color.red(pixColor); pixG = Color.green(pixColor); pixB = Color.blue(pixColor); newR = (int) (0.393 * pixR + 0.769 * pixG + 0.189 * pixB); newG = (int) (0.349 * pixR + 0.686 * pixG + 0.168 * pixB); newB = (int) (0.272 * pixR + 0.534 * pixG + 0.131 * pixB); int newColor = Color.argb(255, newR > 255 ? 255 : newR, newG > 255 ? 255 : newG, newB > 255 ? 255 : newB); pixels[width * i + k] = newColor; } } newBitmap.setPixels(pixels, 0, width, 0, 0, width, height); return newBitmap; } /** * 模糊效果处理 * @return 模糊效果处理后的图片 */ public Bitmap blur() { int width = bitmap.getWidth(); int height = bitmap.getHeight(); Bitmap newBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); int pixColor = 0; int newR = 0; int newG = 0; int newB = 0; int newColor = 0; int[][] colors = new int[9][3]; for (int i = 1, length = width - 1; i < length; i++) { for (int k = 1, len = height - 1; k < len; k++) { for (int m = 0; m < 9; m++) { int s = 0; int p = 0; switch (m) { case 0: s = i - 1; p = k - 1; break; case 1: s = i; p = k - 1; break; case 2: s = i + 1; p = k - 1; break; case 3: s = i + 1; p = k; break; case 4: s = i + 1; p = k + 1; break; case 5: s = i; p = k + 1; break; case 6: s = i - 1; p = k + 1; break; case 7: s = i - 1; p = k; break; case 8: s = i; p = k; } pixColor = bitmap.getPixel(s, p); colors[m][0] = Color.red(pixColor); colors[m][1] = Color.green(pixColor); colors[m][2] = Color.blue(pixColor); } for (int m = 0; m < 9; m++) { newR += colors[m][0]; newG += colors[m][1]; newB += colors[m][2]; } newR = (int) (newR / 9F); newG = (int) (newG / 9F); newB = (int) (newB / 9F); newR = Math.min(255, Math.max(0, newR)); newG = Math.min(255, Math.max(0, newG)); newB = Math.min(255, Math.max(0, newB)); newColor = Color.argb(255, newR, newG, newB); newBitmap.setPixel(i, k, newColor); newR = 0; newG = 0; newB = 0; } } return newBitmap; } /** * 柔化效果处理 * @return 柔化效果处理后的图片 */ public Bitmap soften() { // 高斯矩阵 int[] gauss = new int[] { 1, 2, 1, 2, 4, 2, 1, 2, 1 }; int width = bitmap.getWidth(); int height = bitmap.getHeight(); Bitmap newBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); int pixR = 0; int pixG = 0; int pixB = 0; int pixColor = 0; int newR = 0; int newG = 0; int newB = 0; int delta = 16; // 值越小图片会越亮，越大则越暗 int idx = 0; int[] pixels = new int[width * height]; bitmap.getPixels(pixels, 0, width, 0, 0, width, height); for (int i = 1, length = height - 1; i < length; i++) { for (int k = 1, len = width - 1; k < len; k++) { idx = 0; for (int m = -1; m <= 1; m++) { for (int n = -1; n <= 1; n++) { pixColor = pixels[(i + m) * width + k + n]; pixR = Color.red(pixColor); pixG = Color.green(pixColor); pixB = Color.blue(pixColor); newR = newR + (int) (pixR * gauss[idx]); newG = newG + (int) (pixG * gauss[idx]); newB = newB + (int) (pixB * gauss[idx]); idx++; } } newR /= delta; newG /= delta; newB /= delta; newR = Math.min(255, Math.max(0, newR)); newG = Math.min(255, Math.max(0, newG)); newB = Math.min(255, Math.max(0, newB)); pixels[i * width + k] = Color.argb(255, newR, newG, newB); newR = 0; newG = 0; newB = 0; } } newBitmap.setPixels(pixels, 0, width, 0, 0, width, height); return newBitmap; } /** * 光照效果处理 * @param centerX 光源在X轴的位置 * @param centerY 光源在Y轴的位置 * @return 光照效果处理后的图片 */ public Bitmap sunshine(int centerX, int centerY) { final int width = bitmap.getWidth(); final int height = bitmap.getHeight(); Bitmap newBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); int pixR = 0; int pixG = 0; int pixB = 0; int pixColor = 0; int newR = 0; int newG = 0; int newB = 0; int radius = Math.min(centerX, centerY); final float strength = 150F; // 光照强度 100~150 int[] pixels = new int[width * height]; bitmap.getPixels(pixels, 0, width, 0, 0, width, height); int pos = 0; for (int i = 1, length = height - 1; i < length; i++) { for (int k = 1, len = width - 1; k < len; k++) { pos = i * width + k; pixColor = pixels[pos]; pixR = Color.red(pixColor); pixG = Color.green(pixColor); pixB = Color.blue(pixColor); newR = pixR; newG = pixG; newB = pixB; // 计算当前点到光照中心的距离，平面座标系中求两点之间的距离 int distance = (int) (Math.pow((centerY - i), 2) + Math.pow(centerX - k, 2)); if (distance < radius * radius) { // 按照距离大小计算增加的光照值 int result = (int) (strength * (1.0 - Math.sqrt(distance) / radius)); newR = pixR + result; newG = pixG + result; newB = pixB + result; } newR = Math.min(255, Math.max(0, newR)); newG = Math.min(255, Math.max(0, newG)); newB = Math.min(255, Math.max(0, newB)); pixels[pos] = Color.argb(255, newR, newG, newB); } } newBitmap.setPixels(pixels, 0, width, 0, 0, width, height); return newBitmap; } /** * 底片效果处理 * @return 底片效果处理后的图片 */ public Bitmap film() { // RGBA的最大值 final int MAX_VALUE = 255; int width = bitmap.getWidth(); int height = bitmap.getHeight(); Bitmap newBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); int pixR = 0; int pixG = 0; int pixB = 0; int pixColor = 0; int newR = 0; int newG = 0; int newB = 0; int[] pixels = new int[width * height]; bitmap.getPixels(pixels, 0, width, 0, 0, width, height); int pos = 0; for (int i = 1, length = height - 1; i < length; i++) { for (int k = 1, len = width - 1; k < len; k++) { pos = i * width + k; pixColor = pixels[pos]; pixR = Color.red(pixColor); pixG = Color.green(pixColor); pixB = Color.blue(pixColor); newR = MAX_VALUE - pixR; newG = MAX_VALUE - pixG; newB = MAX_VALUE - pixB; newR = Math.min(MAX_VALUE, Math.max(0, newR)); newG = Math.min(MAX_VALUE, Math.max(0, newG)); newB = Math.min(MAX_VALUE, Math.max(0, newB)); pixels[pos] = Color.argb(MAX_VALUE, newR, newG, newB); } } newBitmap.setPixels(pixels, 0, width, 0, 0, width, height); return newBitmap; } /** * 锐化效果处理 * @return 锐化效果处理后的图片 */ public Bitmap sharpen() { // 拉普拉斯矩阵 int[] laplacian = new int[] { -1, -1, -1, -1, 9, -1, -1, -1, -1 }; int width = bitmap.getWidth(); int height = bitmap.getHeight(); Bitmap newBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); int pixR = 0; int pixG = 0; int pixB = 0; int pixColor = 0; int newR = 0; int newG = 0; int newB = 0; int idx = 0; float alpha = 0.3F; int[] pixels = new int[width * height]; bitmap.getPixels(pixels, 0, width, 0, 0, width, height); for (int i = 1, length = height - 1; i < length; i++) { for (int k = 1, len = width - 1; k < len; k++) { idx = 0; for (int m = -1; m <= 1; m++) { for (int n = -1; n <= 1; n++) { pixColor = pixels[(i + n) * width + k + m]; pixR = Color.red(pixColor); pixG = Color.green(pixColor); pixB = Color.blue(pixColor); newR = newR + (int) (pixR * laplacian[idx] * alpha); newG = newG + (int) (pixG * laplacian[idx] * alpha); newB = newB + (int) (pixB * laplacian[idx] * alpha); idx++; } } newR = Math.min(255, Math.max(0, newR)); newG = Math.min(255, Math.max(0, newG)); newB = Math.min(255, Math.max(0, newB)); pixels[i * width + k] = Color.argb(255, newR, newG, newB); newR = 0; newG = 0; newB = 0; } } newBitmap.setPixels(pixels, 0, width, 0, 0, width, height); return newBitmap; } /** * 浮雕效果处理 * @return 浮雕效果处理后的图片 */ public Bitmap emboss() { int width = bitmap.getWidth(); int height = bitmap.getHeight(); Bitmap newBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565); int pixR = 0; int pixG = 0; int pixB = 0; int pixColor = 0; int newR = 0; int newG = 0; int newB = 0; int[] pixels = new int[width * height]; bitmap.getPixels(pixels, 0, width, 0, 0, width, height); int pos = 0; for (int i = 1, length = height - 1; i < length; i++) { for (int k = 1, len = width - 1; k < len; k++) { pos = i * width + k; pixColor = pixels[pos]; pixR = Color.red(pixColor); pixG = Color.green(pixColor); pixB = Color.blue(pixColor); pixColor = pixels[pos + 1]; newR = Color.red(pixColor) - pixR + 127; newG = Color.green(pixColor) - pixG + 127; newB = Color.blue(pixColor) - pixB + 127; newR = Math.min(255, Math.max(0, newR)); newG = Math.min(255, Math.max(0, newG)); newB = Math.min(255, Math.max(0, newB)); pixels[pos] = Color.argb(255, newR, newG, newB); } } newBitmap.setPixels(pixels, 0, width, 0, 0, width, height); return newBitmap; }
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