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Bitmap.makeFromImage, Image.makeRaster, .makeFromBitmap, .getImageInf…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,125 @@ | ||
| package org.jetbrains.skija.examples.scenes; | ||
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| import java.io.*; | ||
| import java.nio.*; | ||
| import java.nio.file.*; | ||
| import java.nio.file.Path; | ||
| import java.util.*; | ||
| import java.util.function.*; | ||
| import org.jetbrains.skija.*; | ||
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|
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| public class BitmapImageScene extends Scene { | ||
| public final Image image; | ||
| public int x, y; | ||
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| public BitmapImageScene() { | ||
| try { | ||
| image = Image.makeFromEncoded(Files.readAllBytes(Path.of(file("images/IMG_7098.jpeg")))); | ||
| } catch (IOException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
|
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| public void advance(Canvas canvas, int width) { | ||
| canvas.restore(); | ||
| x += 220; | ||
| if (x + 220 >= width) { | ||
| x = 20; | ||
| y += 240; | ||
| } | ||
| canvas.save(); | ||
| canvas.translate(x, y); | ||
| } | ||
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| @Override | ||
| public void draw(Canvas canvas, int width, int height, float dpi, int xpos, int ypos) { | ||
| canvas.save(); | ||
| canvas.translate(20, 20); | ||
| x = 20; | ||
| y = 20; | ||
|
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| // Image | ||
| canvas.drawImageRect(image, Rect.makeXYWH(0, 0, 200, 200)); | ||
| canvas.drawString("Image", 0, 220, inter13, blackFill); | ||
| advance(canvas, width); | ||
|
|
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| // Bitmap + Image.readPixels | ||
| var bitmap = new Bitmap(); | ||
| bitmap.allocPixels(ImageInfo.makeS32(400, 400, ColorAlphaType.OPAQUE)); | ||
| image.readPixels(bitmap); | ||
| canvas.drawBitmapRect(bitmap, Rect.makeXYWH(0, 0, 200, 200)); | ||
| canvas.drawString("Image.readPixels", 0, 220, inter13, blackFill); | ||
| advance(canvas, width); | ||
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| // Bitmap + Image.readPixels(50, 50) | ||
| var partialBitmap = new Bitmap(); | ||
| partialBitmap.allocPixels(new ImageInfo(300, 300, ColorType.GRAY_8, ColorAlphaType.OPAQUE)); | ||
| image.readPixels(partialBitmap, 50, 50); | ||
| canvas.drawBitmapRect(partialBitmap, Rect.makeXYWH(25, 25, 150, 150)); | ||
| canvas.drawString("Image.readPixels(50, 50)", 0, 220, inter13, blackFill); | ||
| advance(canvas, width); | ||
|
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| // Bitmap.makeFromImage | ||
| var bitmapFromImage = Bitmap.makeFromImage(image); | ||
| canvas.drawBitmapRect(bitmapFromImage, Rect.makeXYWH(0, 0, 200, 200)); | ||
| canvas.drawString("Bitmap.makeFromImage", 0, 220, inter13, blackFill); | ||
| advance(canvas, width); | ||
|
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| // Image.makeFromBitmap | ||
| var imageFromBitmap = Image.makeFromBitmap(bitmap); | ||
| canvas.drawImageRect(imageFromBitmap, Rect.makeXYWH(0, 0, 200, 200)); | ||
| canvas.drawString("Image.makeFromBitmap", 0, 220, inter13, blackFill); | ||
| advance(canvas, width); | ||
|
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| // Bitmap readPixels/installPixels | ||
| var info = bitmapFromImage.getImageInfo(); | ||
| var threshold = 100 + phase() * 100; | ||
| byte[] pixels = bitmapFromImage.readPixels(); | ||
| ByteBuffer buffer = ByteBuffer.wrap(pixels); // Assume RGBA_8888 | ||
| Function<Integer, Integer> luminocity = color -> Color.getR(color) + Color.getG(color) + Color.getB(color); | ||
| Comparator<Integer> cmp = (a, b) -> Integer.compare(luminocity.apply(a), luminocity.apply(b)); | ||
| for (int x = 0; x < info.getWidth(); ++x) { | ||
| // read pixels | ||
| Integer column[] = new Integer[info.getHeight()]; | ||
| for (int y = 0; y < info.getHeight(); ++y) | ||
| column[y] = buffer.getInt((y * info.getWidth() + x) * info.getBytesPerPixel()); | ||
|
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| // sort pixels | ||
| var lastIdx = 0; | ||
| for (int y = 0; y < info.getHeight() - 1; ++y) { | ||
| if (Math.abs(luminocity.apply(column[y]) - luminocity.apply(column[y + 1])) > threshold) { | ||
| Arrays.parallelSort(column, lastIdx, y, cmp); | ||
| lastIdx = y; | ||
| } | ||
| } | ||
| Arrays.parallelSort(column, lastIdx, info.getHeight(), cmp); | ||
|
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| // write pixels | ||
| for (int y = 0; y < info.getHeight(); ++y) | ||
| buffer.putInt((y * info.getWidth() + x) * info.getBytesPerPixel(), column[y]); | ||
| } | ||
| bitmapFromImage.installPixels(pixels); | ||
| canvas.drawBitmapRect(bitmapFromImage, Rect.makeXYWH(0, 0, 200, 200)); | ||
| canvas.drawString("Bitmap.readPixels/installPixels", 0, 220, inter13, blackFill); | ||
| advance(canvas, width); | ||
|
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| // Image.makeRaster | ||
| var imageFromPixels = Image.makeRaster(info, pixels, info.getMinRowBytes()); | ||
| canvas.drawImageRect(imageFromPixels, Rect.makeXYWH(0, 0, 200, 200)); | ||
| canvas.drawString("Image.makeRaster", 0, 220, inter13, blackFill); | ||
| advance(canvas, width); | ||
|
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| // Image.makeRaster + Data | ||
| var imageFromData = Image.makeRaster(info, Data.makeFromBytes(pixels), info.getMinRowBytes()); | ||
| canvas.drawImageRect(imageFromPixels, Rect.makeXYWH(0, 0, 200, 200)); | ||
| canvas.drawString("Image.makeRaster + Data", 0, 220, inter13, blackFill); | ||
| advance(canvas, width); | ||
|
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| bitmap.close(); | ||
| partialBitmap.close(); | ||
| bitmapFromImage.close(); | ||
| imageFromBitmap.close(); | ||
| imageFromPixels.close(); | ||
| imageFromData.close(); | ||
| } | ||
| } |
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