implement some Canvas methods needed for composeUI

src/api-impl-jni/android_graphics_Paint.c

@@ -80,7 +80,17 @@ JNIEXPORT void JNICALL Java_android_graphics_Paint_native_1set_1stroke_1width(JN
 	sk_paint_set_stroke_width(_PTR(skia_paint), width);
 }
 
+JNIEXPORT jfloat JNICALL Java_android_graphics_Paint_native_1get_1stroke_1width(JNIEnv *env, jclass this, jlong skia_paint)
+{
+	return sk_paint_get_stroke_width(_PTR(skia_paint));
+}
+
 JNIEXPORT void JNICALL Java_android_graphics_Paint_native_1set_1style(JNIEnv *env, jclass this, jlong skia_paint, jint style)
 {
 	sk_paint_set_style(_PTR(skia_paint), (sk_paint_style_t)style);
 }
+
+JNIEXPORT void JNICALL Java_android_graphics_Paint_native_1set_1blendmode(JNIEnv *env, jclass this, jlong skia_paint, jint blendmode)
+{
+	sk_paint_set_blendmode(_PTR(skia_paint), (sk_blendmode_t)blendmode);
+}

src/api-impl-jni/generated_headers/android_graphics_GskCanvas.h

@@ -81,6 +81,14 @@ JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawLine
 JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawText
   (JNIEnv *, jobject, jlong, jstring, jfloat, jfloat, jlong);
 
+/*
+ * Class:     android_graphics_GskCanvas
+ * Method:    native_drawRoundRect
+ * Signature: (JFFFFFFIF)V
+ */
+JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawRoundRect
+  (JNIEnv *, jobject, jlong, jfloat, jfloat, jfloat, jfloat, jfloat, jfloat, jint, jfloat);
+
 #ifdef __cplusplus
 }
 #endif

src/api-impl-jni/generated_headers/android_graphics_Paint.h

@@ -113,6 +113,14 @@ JNIEXPORT jfloat JNICALL Java_android_graphics_Paint_native_1measure_1text
 JNIEXPORT void JNICALL Java_android_graphics_Paint_native_1set_1stroke_1width
   (JNIEnv *, jclass, jlong, jfloat);
 
+/*
+ * Class:     android_graphics_Paint
+ * Method:    native_get_stroke_width
+ * Signature: (J)F
+ */
+JNIEXPORT jfloat JNICALL Java_android_graphics_Paint_native_1get_1stroke_1width
+  (JNIEnv *, jclass, jlong);
+
 /*
  * Class:     android_graphics_Paint
  * Method:    native_set_style
@@ -121,6 +129,14 @@ JNIEXPORT void JNICALL Java_android_graphics_Paint_native_1set_1stroke_1width
 JNIEXPORT void JNICALL Java_android_graphics_Paint_native_1set_1style
   (JNIEnv *, jclass, jlong, jint);
 
+/*
+ * Class:     android_graphics_Paint
+ * Method:    native_set_blendmode
+ * Signature: (JI)V
+ */
+JNIEXPORT void JNICALL Java_android_graphics_Paint_native_1set_1blendmode
+  (JNIEnv *, jclass, jlong, jint);
+
 #ifdef __cplusplus
 }
 #endif

src/api-impl-jni/generated_headers/android_view_ViewGroup.h

@@ -223,6 +223,14 @@ JNIEXPORT void JNICALL Java_android_view_ViewGroup_native_1removeView
 JNIEXPORT void JNICALL Java_android_view_ViewGroup_native_1drawChildren
   (JNIEnv *, jobject, jlong, jlong);
 
+/*
+ * Class:     android_view_ViewGroup
+ * Method:    native_drawChild
+ * Signature: (JJJ)V
+ */
+JNIEXPORT void JNICALL Java_android_view_ViewGroup_native_1drawChild
+  (JNIEnv *, jobject, jlong, jlong, jlong);
+
 #ifdef __cplusplus
 }
 #endif

src/api-impl-jni/graphics/android_graphics_GskCanvas.c

@@ -119,3 +119,21 @@ JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawText(JNIEnv *
 	gtk_snapshot_translate(snapshot, &GRAPHENE_POINT_INIT(-x, -y));
 	g_object_unref(layout);
 }
+
+JNIEXPORT void JNICALL Java_android_graphics_GskCanvas_native_1drawRoundRect(JNIEnv *env, jclass this_class, jlong snapshot_ptr, jfloat left, jfloat top, jfloat right, jfloat bottom, jfloat rx, jfloat ry, jint color, jfloat width)
+{
+	GdkSnapshot *snapshot = (GdkSnapshot *)_PTR(snapshot_ptr);
+	GdkRGBA gdk_color[4];
+	for (int i = 0; i < 4; i++) {
+		gdk_color[i].red = (float)((color >> 16) & 0xff) / 0xff;
+		gdk_color[i].green = (float)((color >> 8)  & 0xff) / 0xff;
+		gdk_color[i].blue = (float)((color >> 0)  & 0xff) / 0xff;
+		gdk_color[i].alpha = (float)((color >> 24) & 0xff) / 0xff;
+	}
+	GskRoundedRect round_rect = {
+		.bounds = GRAPHENE_RECT_INIT(left, top, right - left, bottom - top),
+		.corner = {{rx, ry}, {rx, ry}, {rx, ry}, {rx, ry}},
+	};
+	const float widths[4] = {width, width, width, width};
+	gtk_snapshot_append_border(snapshot, &round_rect, widths, gdk_color);
+}

src/api-impl-jni/graphics/android_graphics_Matrix.c

@@ -246,3 +246,10 @@ JNIEXPORT jboolean JNICALL Java_android_graphics_Matrix_native_1preRotate__JFFF(
 	graphene_matrix_translate(matrix, &GRAPHENE_POINT3D_INIT(px, py, 0));
 	return true;
 }
+
+JNIEXPORT jboolean JNICALL Java_android_graphics_Matrix_native_1equals(JNIEnv *env, jclass class, jlong matrix1_ptr, jlong matrix2_ptr)
+{
+	graphene_matrix_t *matrix1 = (graphene_matrix_t *)_PTR(matrix1_ptr);
+	graphene_matrix_t *matrix2 = (graphene_matrix_t *)_PTR(matrix2_ptr);
+	return graphene_matrix_equal(matrix1, matrix2);
+}

src/api-impl-jni/views/android_view_ViewGroup.c

@@ -54,3 +54,12 @@ JNIEXPORT void JNICALL Java_android_view_ViewGroup_native_1drawChildren(JNIEnv *
 	GdkSnapshot *snapshot = GDK_SNAPSHOT(_PTR(snapshot_ptr));
 	gtk_widget_snapshot_child(&wrapper->parent_instance, wrapper->child, snapshot);
 }
+
+JNIEXPORT void JNICALL Java_android_view_ViewGroup_native_1drawChild(JNIEnv *env, jobject this, jlong widget_ptr, jlong child_ptr, jlong snapshot_ptr)
+{
+	GtkWidget *widget = GTK_WIDGET(_PTR(widget_ptr));
+	GtkWidget *child = gtk_widget_get_parent(GTK_WIDGET(_PTR(child_ptr)));
+	GdkSnapshot *snapshot = GDK_SNAPSHOT(_PTR(snapshot_ptr));
+	gtk_widget_queue_draw(child);   // FIXME: why didn't compose UI invalidate the child?
+	gtk_widget_snapshot_child(widget, child, snapshot);
+}

src/api-impl/android/graphics/Canvas.java

@@ -488,7 +488,7 @@ public class Canvas {
 
 	public boolean getClipBounds(Rect outRect) {
 		outRect.set(0, 0, 100, 100);
-		return false;
+		return true;
 	}
 
 	private static native long native_canvas_from_bitmap(long pixbuf);

src/api-impl/android/graphics/GskCanvas.java

@@ -89,6 +89,11 @@ public class GskCanvas extends Canvas {
 		drawBitmap(bitmap, src, new Rect((int)dst.left, (int)dst.top, (int)dst.right, (int)dst.bottom), paint);
 	}
 
+	@Override
+	public void drawRoundRect(float left, float top, float right, float bottom, float rx, float ry, Paint paint) {
+		native_drawRoundRect(snapshot, left, top, right, bottom, rx, ry, paint.getColor(), paint.getStrokeWidth());
+	}
+
 	protected native void native_drawBitmap(long snapshot, long texture, int x, int y, int width, int height, int color);
 	protected native void native_drawRect(long snapshot, float left, float top, float right, float bottom, int color);
 	protected native void native_drawPath(long snapshot, long path, long paint);
@@ -98,4 +103,5 @@ public class GskCanvas extends Canvas {
 	protected native void native_restore(long snapshot);
 	protected native void native_drawLine(long snapshot, float startX, float startY, float stopX, float stopY, long paint);
 	protected native void native_drawText(long snapshot, String text, float x, float y, long paint);
+	protected native void native_drawRoundRect(long snapshot, float left, float top, float right, float bottom, float rx, float ry, int color, float strokeWidth);
 }

src/api-impl/android/graphics/Paint.java

@@ -1,5 +1,7 @@
 package android.graphics;
 
+import java.util.Locale;
+
 public class Paint {
 	public static final int ANTI_ALIAS_FLAG           = (1 << 0);
 	public static final int FILTER_BITMAP_FLAG        = (1 << 1);
@@ -185,7 +187,9 @@ public class Paint {
 
 	public /*native*/ int getAlpha() { return 0; }
 	public /*native*/ void setAlpha(int a) {}
-	public /*native*/ float getStrokeWidth() { return 0; }
+	public float getStrokeWidth() {
+		return native_get_stroke_width(skia_paint);
+	}
 
 	public /*native*/ float getStrokeMiter() { return 0; }
 	public /*native*/ void setStrokeMiter(float miter) {}
@@ -202,7 +206,12 @@ public class Paint {
 
 	public void setShadowLayer(float radius, float dx, float dy, int color) {}
 
-	public Xfermode setXfermode(Xfermode xfermode) { return xfermode; }
+	public Xfermode setXfermode(Xfermode xfermode) {
+		if (xfermode instanceof PorterDuffXfermode) {
+			native_set_blendmode(skia_paint, ((PorterDuffXfermode)xfermode).mode.nativeInt);
+		}
+		return xfermode;
+	}
 
 	public void setLetterSpacing(float spacing) {}
 
@@ -290,6 +299,10 @@ public class Paint {
 
 	public Join getStrokeJoin() { return Join.MITER; }
 
+	public Locale getTextLocale() { return Locale.getDefault(); }
+
+	public float getLetterSpacing() { return 1.0f; }
+
 	private native long native_constructor();
 	private native void native_set_antialias(long skia_paint, boolean aa);
 	private native void native_set_color(long skia_paint, int color);
@@ -300,5 +313,7 @@ public class Paint {
 	private static native void native_set_text_size(long skia_font, float size);
 	private static native float native_measure_text(long skia_font, CharSequence text, int start, int end, long skia_paint);
 	private static native void native_set_stroke_width(long skia_font, float width);
+	private static native float native_get_stroke_width(long skia_font);
 	private static native void native_set_style(long skia_paint, int style);
+	private static native void native_set_blendmode(long skia_paint, int mode);
 }

src/api-impl/android/graphics/PorterDuffXfermode.java

@@ -1,5 +1,10 @@
 package android.graphics;
 
 public class PorterDuffXfermode extends Xfermode {
-	public PorterDuffXfermode(PorterDuff.Mode mode) {}
+
+	PorterDuff.Mode mode;
+
+	public PorterDuffXfermode(PorterDuff.Mode mode) {
+		this.mode = mode;
+	}
 }

src/api-impl/android/text/BoringLayout.java

@@ -2,6 +2,10 @@ package android.text;
 
 public class BoringLayout extends Layout {
 
+	public BoringLayout (CharSequence source, TextPaint paint, int outerwidth, Layout.Alignment align, float spacingMult, float spacingAdd, BoringLayout.Metrics metrics, boolean includePad) {
+		super(source, paint, outerwidth, align, spacingMult, spacingAdd);
+	}
+
 	public static class Metrics {};
 
 	public static Metrics isBoring(CharSequence source, TextPaint paint, Metrics metrics) {

src/api-impl/android/text/Layout.java

@@ -12,6 +12,14 @@ public class Layout {
 		ALIGN_RIGHT,
 	}
 
+	private CharSequence text;
+	private TextPaint paint;
+
+	protected Layout(CharSequence text, TextPaint paint, int width, Layout.Alignment align, float spacingMult, float spacingAdd) {
+		this.text = text;
+		this.paint = paint;
+	}
+
 	public int getLineCount() {return 1;}
 
 	public float getLineWidth(int line) {return 10;}
@@ -20,18 +28,20 @@ public class Layout {
 
 	public int getEllipsisCount(int line) {return 0;}
 
-	public CharSequence getText() {return "FIXME Layout.getText";}
+	public CharSequence getText() {return text;}
 
 	public int getWidth() {return 10;}
 
 	public int getHeight() {return 10;}
 
-	public void draw(Canvas canvas) {}
+	public void draw(Canvas canvas) {
+		canvas.drawText(text.toString(), 0, 0, paint);
+	}
 
 	public int getParagraphDirection(int line) {return 0;}
 
 	public static float getDesiredWidth(CharSequence source, int start, int end, TextPaint paint) {
-		return 10;
+		return 400;
 	}
 
 	public int getLineEnd(int line) {return 100;}
@@ -59,4 +69,10 @@ public class Layout {
 	public int getLineForVertical(int y) {return 0;}
 
 	public int getOffsetForHorizontal(int line, float x) {return 0;}
+
+	public float getPrimaryHorizontal(int line) {return 0;}
+
+	public int getLineForOffset(int offset) {return 0;}
+
+	public int getLineTop(int line) {return 0;}
 }

src/api-impl/android/text/StaticLayout.java

@@ -1,22 +1,14 @@
 package android.text;
 
-import android.graphics.Canvas;
-
 public class StaticLayout extends Layout {
 
-	private CharSequence text;
-
 	public StaticLayout(CharSequence source, int bufstart, int bufend,
 						TextPaint paint, int outerwidth,
 						Alignment align, TextDirectionHeuristic textDir,
 						float spacingmult, float spacingadd,
 						boolean includepad,
 						TextUtils.TruncateAt ellipsize, int ellipsizedWidth, int maxLines) {
-		this.text = source;
+		super(source, paint, outerwidth, align, spacingmult, spacingadd);
-	}
-
-	public CharSequence getText() {
-		return text;
 	}
 
 	public int getWidth() {
@@ -29,5 +21,4 @@ public class StaticLayout extends Layout {
 
 	public float getLineLeft(int line) {return 0;}
 
-	public void draw(Canvas canvas) {}
 }

src/api-impl/android/text/TextDirectionHeuristics.java

@@ -15,4 +15,11 @@ public class TextDirectionHeuristics {
 			return true;
 		}
 	};
+
+	public static final TextDirectionHeuristic FIRSTSTRONG_LTR = new TextDirectionHeuristic() {
+		@Override
+		public boolean isRtl(CharSequence text, int start, int end) {
+			return false;
+		}
+	};
 }

src/api-impl/android/view/ViewGroup.java

@@ -5,6 +5,7 @@ import android.animation.LayoutTransition;
 import android.content.Context;
 import android.content.res.TypedArray;
 import android.graphics.Canvas;
+import android.graphics.GskCanvas;
 import android.util.AttributeSet;
 import java.util.ArrayList;
 import java.util.Iterator;
@@ -147,6 +148,7 @@ public class ViewGroup extends View implements ViewParent, ViewManager {
 	protected native void native_removeView(long widget, long child);
 	@Override
 	protected native void native_drawChildren(long widget, long snapshot);
+	protected native void native_drawChild(long widget, long child, long snapshot);
 	@Override
 	protected void native_drawContent(long widget, long snapshot) {}
 
@@ -392,6 +394,8 @@ public class ViewGroup extends View implements ViewParent, ViewManager {
 	}
 
 	public boolean drawChild(Canvas canvas, View child, long drawingTime) {
+		if (canvas instanceof GskCanvas)
+			native_drawChild(widget, child.widget, ((GskCanvas)canvas).snapshot);
 		return false;
 	}
 

src/api-impl/android/widget/TextView.java

@@ -5,6 +5,7 @@ import android.content.res.ColorStateList;
 import android.content.res.TypedArray;
 import android.graphics.Typeface;
 import android.graphics.drawable.Drawable;
+import android.text.BoringLayout;
 import android.text.Editable;
 import android.text.InputFilter;
 import android.text.Layout;
@@ -281,7 +282,7 @@ public class TextView extends View {
 	}
 
 	public Layout getLayout() {
-		return new Layout();
+		return new BoringLayout(getText(), getPaint(), getWidth(), Layout.Alignment.ALIGN_NORMAL, 1, 0, new BoringLayout.Metrics(), false);
 	}
 
 	public int getCurrentTextColor() {return 0;}