src.android.graphics.BaseCanvas_Delegate Maven / Gradle / Ivy
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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.graphics;
import com.android.ide.common.rendering.api.LayoutLog;
import com.android.layoutlib.bridge.Bridge;
import com.android.layoutlib.bridge.impl.DelegateManager;
import com.android.layoutlib.bridge.impl.GcSnapshot;
import com.android.layoutlib.bridge.impl.PorterDuffUtility;
import com.android.ninepatch.NinePatchChunk;
import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
import android.annotation.Nullable;
import android.text.TextUtils;
import android.util.imagepool.ImagePool;
import android.util.imagepool.ImagePoolProvider;
import java.awt.*;
import java.awt.geom.AffineTransform;
import java.awt.geom.Arc2D;
import java.awt.geom.Area;
import java.awt.geom.Rectangle2D;
import java.awt.image.BufferedImage;
import java.awt.image.ColorModel;
import java.awt.image.DataBuffer;
public class BaseCanvas_Delegate {
// ---- delegate manager ----
protected static DelegateManager sManager =
new DelegateManager<>(BaseCanvas_Delegate.class);
// ---- delegate helper data ----
private final static boolean[] sBoolOut = new boolean[1];
// ---- delegate data ----
protected Bitmap_Delegate mBitmap;
protected GcSnapshot mSnapshot;
// ---- Public Helper methods ----
protected BaseCanvas_Delegate(Bitmap_Delegate bitmap) {
mSnapshot = GcSnapshot.createDefaultSnapshot(mBitmap = bitmap);
}
protected BaseCanvas_Delegate() {
mSnapshot = GcSnapshot.createDefaultSnapshot(null /*image*/);
}
/**
* Disposes of the {@link Graphics2D} stack.
*/
protected void dispose() {
mSnapshot.dispose();
}
/**
* Returns the current {@link Graphics2D} used to draw.
*/
public GcSnapshot getSnapshot() {
return mSnapshot;
}
// ---- native methods ----
@LayoutlibDelegate
/*package*/ static void nDrawBitmap(long nativeCanvas, long bitmapHandle, float left, float top,
long nativePaintOrZero, int canvasDensity, int screenDensity, int bitmapDensity) {
// get the delegate from the native int.
Bitmap_Delegate bitmapDelegate = Bitmap_Delegate.getDelegate(bitmapHandle);
if (bitmapDelegate == null) {
return;
}
BufferedImage image = bitmapDelegate.getImage();
float right = left + image.getWidth();
float bottom = top + image.getHeight();
drawBitmap(nativeCanvas, bitmapDelegate, nativePaintOrZero,
0, 0, image.getWidth(), image.getHeight(),
(int)left, (int)top, (int)right, (int)bottom);
}
@LayoutlibDelegate
/*package*/ static void nDrawBitmap(long nativeCanvas, long bitmapHandle, float srcLeft,
float srcTop, float srcRight, float srcBottom, float dstLeft, float dstTop,
float dstRight, float dstBottom, long nativePaintOrZero, int screenDensity,
int bitmapDensity) {
// get the delegate from the native int.
Bitmap_Delegate bitmapDelegate = Bitmap_Delegate.getDelegate(bitmapHandle);
if (bitmapDelegate == null) {
return;
}
drawBitmap(nativeCanvas, bitmapDelegate, nativePaintOrZero, (int) srcLeft, (int) srcTop,
(int) srcRight, (int) srcBottom, (int) dstLeft, (int) dstTop, (int) dstRight,
(int) dstBottom);
}
@LayoutlibDelegate
/*package*/ static void nDrawBitmap(long nativeCanvas, int[] colors, int offset, int stride,
final float x, final float y, int width, int height, boolean hasAlpha,
long nativePaintOrZero) {
// create a temp BufferedImage containing the content.
final ImagePool.Image image = ImagePoolProvider.get().acquire(width, height,
hasAlpha ? BufferedImage.TYPE_INT_ARGB : BufferedImage.TYPE_INT_RGB);
image.setRGB(0, 0, width, height, colors, offset, stride);
draw(nativeCanvas, nativePaintOrZero, true /*compositeOnly*/, false /*forceSrcMode*/,
(graphics, paint) -> {
if (paint != null && paint.isFilterBitmap()) {
graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
}
image.drawImage(graphics, (int) x, (int) y, null);
});
}
@LayoutlibDelegate
/*package*/ static void nDrawColor(long nativeCanvas, final int color, final int mode) {
// get the delegate from the native int.
BaseCanvas_Delegate canvasDelegate = sManager.getDelegate(nativeCanvas);
if (canvasDelegate == null) {
return;
}
final int w = canvasDelegate.mBitmap.getImage().getWidth();
final int h = canvasDelegate.mBitmap.getImage().getHeight();
draw(nativeCanvas, (graphics, paint) -> {
// reset its transform just in case
graphics.setTransform(new AffineTransform());
// set the color
graphics.setColor(new java.awt.Color(color, true /*alpha*/));
Composite composite = PorterDuffUtility.getComposite(
PorterDuffUtility.getPorterDuffMode(mode), 0xFF);
if (composite != null) {
graphics.setComposite(composite);
}
graphics.fillRect(0, 0, w, h);
});
}
@LayoutlibDelegate
/*package*/ static void nDrawColor(long nativeCanvas, long nativeColorSpace, long color,
int mode) {
nDrawColor(nativeCanvas, Color.toArgb(color), mode);
}
@LayoutlibDelegate
/*package*/ static void nDrawPaint(long nativeCanvas, long paint) {
// FIXME
Bridge.getLog().fidelityWarning(LayoutLog.TAG_UNSUPPORTED,
"Canvas.drawPaint is not supported.", null, null /*data*/);
}
@LayoutlibDelegate
/*package*/ static void nDrawPoint(long nativeCanvas, float x, float y,
long nativePaint) {
// TODO: need to support the attribute (e.g. stroke width) of paint
draw(nativeCanvas, nativePaint, false /*compositeOnly*/, false /*forceSrcMode*/,
(graphics, paintDelegate) -> graphics.fillRect((int)x, (int)y, 1, 1));
}
@LayoutlibDelegate
/*package*/ static void nDrawPoints(long nativeCanvas, float[] pts, int offset, int count,
long nativePaint) {
if (offset < 0 || count < 0 || offset + count > pts.length) {
throw new IllegalArgumentException("Invalid argument set");
}
// ignore the last point if the count is odd (It means it is not paired).
count = (count >> 1) << 1;
for (int i = offset; i < offset + count; i += 2) {
nDrawPoint(nativeCanvas, pts[i], pts[i + 1], nativePaint);
}
}
@LayoutlibDelegate
/*package*/ static void nDrawLine(long nativeCanvas,
final float startX, final float startY, final float stopX, final float stopY,
long paint) {
draw(nativeCanvas, paint, false /*compositeOnly*/, false /*forceSrcMode*/,
(graphics, paintDelegate) -> graphics.drawLine((int)startX, (int)startY, (int)stopX, (int)stopY));
}
@LayoutlibDelegate
/*package*/ static void nDrawLines(long nativeCanvas,
final float[] pts, final int offset, final int count,
long nativePaint) {
draw(nativeCanvas, nativePaint, false /*compositeOnly*/,
false /*forceSrcMode*/, (graphics, paintDelegate) -> {
for (int i = 0; i < count; i += 4) {
graphics.drawLine((int) pts[i + offset], (int) pts[i + offset + 1],
(int) pts[i + offset + 2], (int) pts[i + offset + 3]);
}
});
}
@LayoutlibDelegate
/*package*/ static void nDrawRect(long nativeCanvas,
final float left, final float top, final float right, final float bottom, long paint) {
draw(nativeCanvas, paint, false /*compositeOnly*/, false /*forceSrcMode*/,
(graphics, paintDelegate) -> {
int style = paintDelegate.getStyle();
// draw
if (style == Paint.Style.FILL.nativeInt ||
style == Paint.Style.FILL_AND_STROKE.nativeInt) {
graphics.fillRect((int)left, (int)top,
(int)(right-left), (int)(bottom-top));
}
if (style == Paint.Style.STROKE.nativeInt ||
style == Paint.Style.FILL_AND_STROKE.nativeInt) {
graphics.drawRect((int)left, (int)top,
(int)(right-left), (int)(bottom-top));
}
});
}
@LayoutlibDelegate
/*package*/ static void nDrawOval(long nativeCanvas, final float left,
final float top, final float right, final float bottom, long paint) {
if (right > left && bottom > top) {
draw(nativeCanvas, paint, false /*compositeOnly*/, false /*forceSrcMode*/,
(graphics, paintDelegate) -> {
int style = paintDelegate.getStyle();
// draw
if (style == Paint.Style.FILL.nativeInt ||
style == Paint.Style.FILL_AND_STROKE.nativeInt) {
graphics.fillOval((int)left, (int)top,
(int)(right - left), (int)(bottom - top));
}
if (style == Paint.Style.STROKE.nativeInt ||
style == Paint.Style.FILL_AND_STROKE.nativeInt) {
graphics.drawOval((int)left, (int)top,
(int)(right - left), (int)(bottom - top));
}
});
}
}
@LayoutlibDelegate
/*package*/ static void nDrawCircle(long nativeCanvas,
float cx, float cy, float radius, long paint) {
nDrawOval(nativeCanvas,
cx - radius, cy - radius, cx + radius, cy + radius,
paint);
}
@LayoutlibDelegate
/*package*/ static void nDrawArc(long nativeCanvas,
final float left, final float top, final float right, final float bottom,
final float startAngle, final float sweep,
final boolean useCenter, long paint) {
if (right > left && bottom > top) {
draw(nativeCanvas, paint, false /*compositeOnly*/, false /*forceSrcMode*/,
(graphics, paintDelegate) -> {
int style = paintDelegate.getStyle();
Arc2D.Float arc = new Arc2D.Float(
left, top, right - left, bottom - top,
-startAngle, -sweep,
useCenter ? Arc2D.PIE : Arc2D.OPEN);
// draw
if (style == Paint.Style.FILL.nativeInt ||
style == Paint.Style.FILL_AND_STROKE.nativeInt) {
graphics.fill(arc);
}
if (style == Paint.Style.STROKE.nativeInt ||
style == Paint.Style.FILL_AND_STROKE.nativeInt) {
graphics.draw(arc);
}
});
}
}
@LayoutlibDelegate
/*package*/ static void nDrawRoundRect(long nativeCanvas,
final float left, final float top, final float right, final float bottom,
final float rx, final float ry, long paint) {
draw(nativeCanvas, paint, false /*compositeOnly*/, false /*forceSrcMode*/,
(graphics, paintDelegate) -> {
int style = paintDelegate.getStyle();
// draw
if (style == Paint.Style.FILL.nativeInt ||
style == Paint.Style.FILL_AND_STROKE.nativeInt) {
graphics.fillRoundRect(
(int)left, (int)top,
(int)(right - left), (int)(bottom - top),
2 * (int)rx, 2 * (int)ry);
}
if (style == Paint.Style.STROKE.nativeInt ||
style == Paint.Style.FILL_AND_STROKE.nativeInt) {
graphics.drawRoundRect(
(int)left, (int)top,
(int)(right - left), (int)(bottom - top),
2 * (int)rx, 2 * (int)ry);
}
});
}
@LayoutlibDelegate
/*package*/ static void nDrawDoubleRoundRect(long nativeCanvas, float outerLeft,
float outerTop, float outerRight, float outerBottom, float outerRx, float outerRy,
float innerLeft, float innerTop, float innerRight, float innerBottom, float innerRx,
float innerRy, long nativePaint) {
nDrawDoubleRoundRect(nativeCanvas, outerLeft, outerTop, outerRight, outerBottom,
new float[]{outerRx, outerRy, outerRx, outerRy, outerRx, outerRy, outerRx, outerRy},
innerLeft, innerTop, innerRight, innerBottom,
new float[]{innerRx, innerRy, innerRx, innerRy, innerRx, innerRy, innerRx, innerRy},
nativePaint);
}
@LayoutlibDelegate
/*package*/ static void nDrawDoubleRoundRect(long nativeCanvas, float outerLeft,
float outerTop, float outerRight, float outerBottom, float[] outerRadii,
float innerLeft, float innerTop, float innerRight, float innerBottom,
float[] innerRadii, long nativePaint) {
draw(nativeCanvas, nativePaint, false /*compositeOnly*/, false /*forceSrcMode*/,
(graphics, paintDelegate) -> {
RoundRectangle innerRect = new RoundRectangle(innerLeft, innerTop,
innerRight - innerLeft, innerBottom - innerTop, innerRadii);
RoundRectangle outerRect = new RoundRectangle(outerLeft, outerTop,
outerRight - outerLeft, outerBottom - outerTop, outerRadii);
int style = paintDelegate.getStyle();
// draw
if (style == Paint.Style.STROKE.nativeInt ||
style == Paint.Style.FILL_AND_STROKE.nativeInt) {
graphics.draw(innerRect);
graphics.draw(outerRect);
}
if (style == Paint.Style.FILL.nativeInt ||
style == Paint.Style.FILL_AND_STROKE.nativeInt) {
Area outerArea = new Area(outerRect);
Area innerArea = new Area(innerRect);
outerArea.subtract(innerArea);
graphics.fill(outerArea);
}
});
}
@LayoutlibDelegate
public static void nDrawPath(long nativeCanvas, long path, long paint) {
final Path_Delegate pathDelegate = Path_Delegate.getDelegate(path);
if (pathDelegate == null) {
return;
}
draw(nativeCanvas, paint, false /*compositeOnly*/, false /*forceSrcMode*/,
(graphics, paintDelegate) -> {
Shape shape = pathDelegate.getJavaShape();
Rectangle2D bounds = shape.getBounds2D();
if (bounds.isEmpty()) {
// Apple JRE 1.6 doesn't like drawing empty shapes.
// http://b.android.com/178278
if (pathDelegate.isEmpty()) {
// This means that the path doesn't have any lines or curves so
// nothing to draw.
return;
}
// The stroke width is not consider for the size of the bounds so,
// for example, a horizontal line, would be considered as an empty
// rectangle.
// If the strokeWidth is not 0, we use it to consider the size of the
// path as well.
float strokeWidth = paintDelegate.getStrokeWidth();
if (strokeWidth <= 0.0f) {
return;
}
bounds.setRect(bounds.getX(), bounds.getY(),
Math.max(strokeWidth, bounds.getWidth()),
Math.max(strokeWidth, bounds.getHeight()));
}
int style = paintDelegate.getStyle();
if (style == Paint.Style.FILL.nativeInt ||
style == Paint.Style.FILL_AND_STROKE.nativeInt) {
graphics.fill(shape);
}
if (style == Paint.Style.STROKE.nativeInt ||
style == Paint.Style.FILL_AND_STROKE.nativeInt) {
graphics.draw(shape);
}
});
}
@LayoutlibDelegate
/*package*/ static void nDrawRegion(long nativeCanvas, long nativeRegion,
long nativePaint) {
// FIXME
Bridge.getLog().fidelityWarning(LayoutLog.TAG_UNSUPPORTED,
"Some canvas paths may not be drawn", null, null);
}
@LayoutlibDelegate
/*package*/ static void nDrawNinePatch(long nativeCanvas, long nativeBitmap, long ninePatch,
final float dstLeft, final float dstTop, final float dstRight, final float dstBottom,
long nativePaintOrZero, final int screenDensity, final int bitmapDensity) {
// get the delegate from the native int.
final Bitmap_Delegate bitmapDelegate = Bitmap_Delegate.getDelegate(nativeBitmap);
if (bitmapDelegate == null) {
return;
}
byte[] c = NinePatch_Delegate.getChunk(ninePatch);
if (c == null) {
// not a 9-patch?
BufferedImage image = bitmapDelegate.getImage();
drawBitmap(nativeCanvas, bitmapDelegate, nativePaintOrZero, 0, 0, image.getWidth(),
image.getHeight(), (int) dstLeft, (int) dstTop, (int) dstRight,
(int) dstBottom);
return;
}
final NinePatchChunk chunkObject = NinePatch_Delegate.getChunk(c);
if (chunkObject == null) {
return;
}
Canvas_Delegate canvasDelegate = Canvas_Delegate.getDelegate(nativeCanvas);
if (canvasDelegate == null) {
return;
}
// this one can be null
Paint_Delegate paintDelegate = Paint_Delegate.getDelegate(nativePaintOrZero);
canvasDelegate.getSnapshot().draw(new GcSnapshot.Drawable() {
@Override
public void draw(Graphics2D graphics, Paint_Delegate paint) {
chunkObject.draw(bitmapDelegate.getImage(), graphics, (int) dstLeft, (int) dstTop,
(int) (dstRight - dstLeft), (int) (dstBottom - dstTop), screenDensity,
bitmapDensity);
}
}, paintDelegate, true, false);
}
@LayoutlibDelegate
/*package*/ static void nDrawBitmapMatrix(long nCanvas, long bitmapHandle,
long nMatrix, long nPaint) {
// get the delegate from the native int.
BaseCanvas_Delegate canvasDelegate = sManager.getDelegate(nCanvas);
if (canvasDelegate == null) {
return;
}
// get the delegate from the native int, which can be null
Paint_Delegate paintDelegate = Paint_Delegate.getDelegate(nPaint);
// get the delegate from the native int.
Bitmap_Delegate bitmapDelegate = Bitmap_Delegate.getDelegate(bitmapHandle);
if (bitmapDelegate == null) {
return;
}
final BufferedImage image = getImageToDraw(bitmapDelegate, paintDelegate, sBoolOut);
Matrix_Delegate matrixDelegate = Matrix_Delegate.getDelegate(nMatrix);
if (matrixDelegate == null) {
return;
}
final AffineTransform mtx = matrixDelegate.getAffineTransform();
canvasDelegate.getSnapshot().draw((graphics, paint) -> {
if (paint != null && paint.isFilterBitmap()) {
graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
}
//FIXME add support for canvas, screen and bitmap densities.
graphics.drawImage(image, mtx, null);
}, paintDelegate, true /*compositeOnly*/, false /*forceSrcMode*/);
}
@LayoutlibDelegate
/*package*/ static void nDrawBitmapMesh(long nCanvas, long bitmapHandle,
int meshWidth, int meshHeight, float[] verts, int vertOffset, int[] colors,
int colorOffset, long nPaint) {
// FIXME
Bridge.getLog().fidelityWarning(LayoutLog.TAG_UNSUPPORTED,
"Canvas.drawBitmapMesh is not supported.", null, null /*data*/);
}
@LayoutlibDelegate
/*package*/ static void nDrawVertices(long nCanvas, int mode, int n,
float[] verts, int vertOffset,
float[] texs, int texOffset,
int[] colors, int colorOffset,
short[] indices, int indexOffset,
int indexCount, long nPaint) {
// FIXME
Bridge.getLog().fidelityWarning(LayoutLog.TAG_UNSUPPORTED,
"Canvas.drawVertices is not supported.", null, null /*data*/);
}
@LayoutlibDelegate
/*package*/ static void nDrawText(long nativeCanvas, char[] text, int index, int count,
float startX, float startY, int flags, long paint) {
drawText(nativeCanvas, text, index, count, startX, startY, flags,
paint);
}
@LayoutlibDelegate
/*package*/ static void nDrawText(long nativeCanvas, String text,
int start, int end, float x, float y, final int flags, long paint) {
int count = end - start;
char[] buffer = TemporaryBuffer.obtain(count);
TextUtils.getChars(text, start, end, buffer, 0);
nDrawText(nativeCanvas, buffer, 0, count, x, y, flags, paint);
}
@LayoutlibDelegate
/*package*/ static void nDrawTextRun(long nativeCanvas, String text,
int start, int end, int contextStart, int contextEnd,
float x, float y, boolean isRtl, long paint) {
int count = end - start;
char[] buffer = TemporaryBuffer.obtain(count);
TextUtils.getChars(text, start, end, buffer, 0);
drawText(nativeCanvas, buffer, 0, count, x, y, isRtl ? Paint.BIDI_RTL : Paint.BIDI_LTR,
paint);
}
@LayoutlibDelegate
/*package*/ static void nDrawTextRun(long nativeCanvas, char[] text,
int start, int count, int contextStart, int contextCount,
float x, float y, boolean isRtl, long paint,
long nativeMeasuredText) {
drawText(nativeCanvas, text, start, count, x, y, isRtl ? Paint.BIDI_RTL : Paint.BIDI_LTR, paint);
}
@LayoutlibDelegate
/*package*/ static void nDrawTextOnPath(long nativeCanvas,
char[] text, int index,
int count, long path,
float hOffset,
float vOffset, int bidiFlags,
long paint) {
// FIXME
Bridge.getLog().fidelityWarning(LayoutLog.TAG_UNSUPPORTED,
"Canvas.drawTextOnPath is not supported.", null, null /*data*/);
}
@LayoutlibDelegate
/*package*/ static void nDrawTextOnPath(long nativeCanvas,
String text, long path,
float hOffset,
float vOffset,
int bidiFlags, long paint) {
// FIXME
Bridge.getLog().fidelityWarning(LayoutLog.TAG_UNSUPPORTED,
"Canvas.drawTextOnPath is not supported.", null, null /*data*/);
}
// ---- Private delegate/helper methods ----
/**
* Executes a {@link GcSnapshot.Drawable} with a given canvas and paint.
* Note that the drawable may actually be executed several times if there are
* layers involved (see {@link #saveLayer(RectF, Paint_Delegate, int)}.
*/
private static void draw(long nCanvas, long nPaint, boolean compositeOnly, boolean forceSrcMode,
GcSnapshot.Drawable drawable) {
// get the delegate from the native int.
BaseCanvas_Delegate canvasDelegate = sManager.getDelegate(nCanvas);
if (canvasDelegate == null) {
return;
}
// get the paint which can be null if nPaint is 0;
Paint_Delegate paintDelegate = Paint_Delegate.getDelegate(nPaint);
canvasDelegate.getSnapshot().draw(drawable, paintDelegate, compositeOnly, forceSrcMode);
}
/**
* Executes a {@link GcSnapshot.Drawable} with a given canvas. No paint object will be provided
* to {@link GcSnapshot.Drawable#draw(Graphics2D, Paint_Delegate)}.
*
Note that the drawable may actually be executed several times if there are
* layers involved (see {@link #saveLayer(RectF, Paint_Delegate, int)}.
*/
private static void draw(long nCanvas, GcSnapshot.Drawable drawable) {
// get the delegate from the native int.
BaseCanvas_Delegate canvasDelegate = sManager.getDelegate(nCanvas);
if (canvasDelegate == null) {
return;
}
canvasDelegate.mSnapshot.draw(drawable);
}
private static void drawText(long nativeCanvas, final char[] text, final int index,
final int count, final float startX, final float startY, final int bidiFlags,
long paint) {
draw(nativeCanvas, paint, false /*compositeOnly*/, false /*forceSrcMode*/,
(graphics, paintDelegate) -> {
// WARNING: the logic in this method is similar to Paint_Delegate.measureText.
// Any change to this method should be reflected in Paint.measureText
// Paint.TextAlign indicates how the text is positioned relative to X.
// LEFT is the default and there's nothing to do.
float x = startX;
int limit = index + count;
if (paintDelegate.getTextAlign() != Paint.Align.LEFT.nativeInt) {
RectF bounds =
paintDelegate.measureText(text, index, count, null, 0, bidiFlags);
float m = bounds.right - bounds.left;
if (paintDelegate.getTextAlign() == Paint.Align.CENTER.nativeInt) {
x -= m / 2;
} else if (paintDelegate.getTextAlign() == Paint.Align.RIGHT.nativeInt) {
x -= m;
}
}
new BidiRenderer(graphics, paintDelegate, text).setRenderLocation(x,
startY).renderText(index, limit, bidiFlags, null, 0, true);
});
}
private static void drawBitmap(long nativeCanvas, Bitmap_Delegate bitmap,
long nativePaintOrZero, final int sleft, final int stop, final int sright,
final int sbottom, final int dleft, final int dtop, final int dright,
final int dbottom) {
// get the delegate from the native int.
BaseCanvas_Delegate canvasDelegate = sManager.getDelegate(nativeCanvas);
if (canvasDelegate == null) {
return;
}
// get the paint, which could be null if the int is 0
Paint_Delegate paintDelegate = Paint_Delegate.getDelegate(nativePaintOrZero);
final BufferedImage image = getImageToDraw(bitmap, paintDelegate, sBoolOut);
draw(nativeCanvas, nativePaintOrZero, true /*compositeOnly*/, sBoolOut[0],
(graphics, paint) -> {
if (paint != null && paint.isFilterBitmap()) {
graphics.setRenderingHint(RenderingHints.KEY_INTERPOLATION,
RenderingHints.VALUE_INTERPOLATION_BILINEAR);
}
//FIXME add support for canvas, screen and bitmap densities.
graphics.drawImage(image, dleft, dtop, dright, dbottom, sleft, stop, sright,
sbottom, null);
});
}
/**
* Returns a BufferedImage ready for drawing, based on the bitmap and paint delegate.
* The image returns, through a 1-size boolean array, whether the drawing code should
* use a SRC composite no matter what the paint says.
*
* @param bitmap the bitmap
* @param paint the paint that will be used to draw
* @param forceSrcMode whether the composite will have to be SRC
* @return the image to draw
*/
private static BufferedImage getImageToDraw(Bitmap_Delegate bitmap, Paint_Delegate paint,
boolean[] forceSrcMode) {
BufferedImage image = bitmap.getImage();
forceSrcMode[0] = false;
// if the bitmap config is alpha_8, then we erase all color value from it
// before drawing it or apply the texture from the shader if present.
if (bitmap.getConfig() == Bitmap.Config.ALPHA_8) {
Shader_Delegate shader = paint.getShader();
java.awt.Paint javaPaint = null;
if (shader instanceof BitmapShader_Delegate) {
javaPaint = shader.getJavaPaint();
}
fixAlpha8Bitmap(image, javaPaint);
} else if (!bitmap.hasAlpha()) {
// hasAlpha is merely a rendering hint. There can in fact be alpha values
// in the bitmap but it should be ignored at drawing time.
// There is two ways to do this:
// - override the composite to be SRC. This can only be used if the composite
// was going to be SRC or SRC_OVER in the first place
// - Create a different bitmap to draw in which all the alpha channel values is set
// to 0xFF.
if (paint != null) {
PorterDuff.Mode mode = PorterDuff.intToMode(paint.getPorterDuffMode());
forceSrcMode[0] = mode == PorterDuff.Mode.SRC_OVER || mode == PorterDuff.Mode.SRC;
}
// if we can't force SRC mode, then create a temp bitmap of TYPE_RGB
if (!forceSrcMode[0]) {
image = Bitmap_Delegate.createCopy(image, BufferedImage.TYPE_INT_RGB, 0xFF);
}
}
return image;
}
/**
* This method will apply the correct color to the passed "only alpha" image. Colors on the
* passed image will be destroyed.
* If the passed javaPaint is null, the color will be set to 0. If a paint is passed, it will
* be used to obtain the color that will be applied.
*
* This will destroy the passed image color channel.
*/
private static void fixAlpha8Bitmap(final BufferedImage image,
@Nullable java.awt.Paint javaPaint) {
int w = image.getWidth();
int h = image.getHeight();
DataBuffer texture = null;
if (javaPaint != null) {
PaintContext context = javaPaint.createContext(ColorModel.getRGBdefault(), null, null,
new AffineTransform(), null);
texture = context.getRaster(0, 0, w, h).getDataBuffer();
}
int[] argb = new int[w * h];
image.getRGB(0, 0, image.getWidth(), image.getHeight(), argb, 0, image.getWidth());
final int length = argb.length;
for (int i = 0; i < length; i++) {
argb[i] &= 0xFF000000;
if (texture != null) {
argb[i] |= texture.getElem(i) & 0x00FFFFFF;
}
}
image.setRGB(0, 0, w, h, argb, 0, w);
}
protected int save(int saveFlags) {
// get the current save count
int count = mSnapshot.size();
mSnapshot = mSnapshot.save(saveFlags);
// return the old save count
return count;
}
protected int saveLayerAlpha(RectF rect, int alpha, int saveFlags) {
Paint_Delegate paint = new Paint_Delegate();
paint.setAlpha(alpha);
return saveLayer(rect, paint, saveFlags);
}
protected int saveLayer(RectF rect, Paint_Delegate paint, int saveFlags) {
// get the current save count
int count = mSnapshot.size();
mSnapshot = mSnapshot.saveLayer(rect, paint, saveFlags);
// return the old save count
return count;
}
/**
* Restores the {@link GcSnapshot} to saveCount
* @param saveCount the saveCount
*/
protected void restoreTo(int saveCount) {
mSnapshot = mSnapshot.restoreTo(saveCount);
}
/**
* Restores the top {@link GcSnapshot}
*/
protected void restore() {
mSnapshot = mSnapshot.restore();
}
protected boolean clipRect(float left, float top, float right, float bottom, int regionOp) {
return mSnapshot.clipRect(left, top, right, bottom, regionOp);
}
}