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api-impl: implement Canvas text drawing as used by Gravity Defied

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implements android.graphics.Typeface (always uses default
typeface for now), one version of Canvas.drawText, one version
of Paint.measureText, and Paint.ascend
This commit is contained in:
Mis012
2023-09-12 19:30:20 +02:00
parent f25e9b021f
commit 24353378be
10 changed files with 198 additions and 21 deletions
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41
src/api-impl/android/graphics/Paint.java
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@@ -1,11 +1,9 @@
package android.graphics;
public class Paint {
public long skia_paint = 0; // should probably be private, but then we'd need to get it from C
private native long native_constructor();
private native void native_set_color(long skia_paint, int color);
private native int native_get_color(long skia_paint);
public long skia_paint = 0;
private Typeface typeface = null;
public long skia_font = 0;
public Paint() {
skia_paint = native_constructor();
@@ -32,21 +30,37 @@ public class Paint {
public void setAntiAlias(boolean aa) {}
public void setStrokeWidth(float width) {}
public void setTextSize(float textSize) {}
public void setTextSize(float size) {
if(skia_font == 0)
skia_font = native_create_font();
native_set_text_size(skia_font, size);
}
public Typeface setTypeface(Typeface typeface) {
return new Typeface();
this.typeface = typeface;
if(skia_font == 0)
skia_font = native_create_font();
native_set_typeface(skia_font, typeface.skia_typeface);
return this.typeface;
}
public void getTextBounds(String text, int start, int end, Rect bounds) {}
public void getTextBounds(char[] text, int index, int count, Rect bounds) {}
public void setFlags(int flags) {}
public void setFilterBitmap(boolean filter) {}
public void setStyle(Style style) {}
public float ascent() { return 0; }
public float ascent() {
if(skia_font == 0)
return 0;
return native_ascent(skia_font);
}
public float measureText(char[] text, int index, int count) { return 10; }
public float measureText(String text, int start, int end) { return 10; }
public float measureText(String text) { return 10; }
public float measureText(String text) {
return native_measure_text(skia_font, text, 0, text.length(), skia_paint);
}
public float measureText(CharSequence text, int start, int end) { return 10; }
public enum Style {
@@ -187,4 +201,13 @@ public class Paint {
public void setStrokeCap(Cap cap) {}
public void setStrokeJoin(Join join) {}
private native long native_constructor();
private native void native_set_color(long skia_paint, int color);
private native int native_get_color(long skia_paint);
private static native long native_create_font();
private static native float native_ascent(long skia_font);
private static native void native_set_typeface(long skia_font, long skia_typeface);
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);
}