static int dotextwidths(JNIEnv* env, SkPaint* paint, const jchar text[], int count, jfloatArray widths) {
AutoJavaFloatArray autoWidths(env, widths, count);
jfloat* widthsArray = autoWidths.ptr();
SkScalar* scalarArray = (SkScalar*)widthsArray;
count = paint->getTextWidths(text, count << 1, scalarArray);
for (int i = 0; i < count; i++) {
widthsArray[i] = SkScalarToFloat(scalarArray[i]);
}
return count;
}
static void doMeasure(SkCanvas* canvas, const SkPaint& paint, const char text[]) {
SkScalar dy = paint.getFontMetrics(NULL);
size_t len = strlen(text);
SkAutoTMalloc<SkScalar> autoWidths(len);
SkScalar* widths = autoWidths.get();
SkAutoTMalloc<SkRect> autoRects(len);
SkRect* rects = autoRects.get();
SkRect bounds;
SkPaint p(paint);
for (size_t i = 0; i < SK_ARRAY_COUNT(gSettings); i++) {
p.setLinearText(gSettings[i].fLinearText);
p.setDevKernText(gSettings[i].fDevKernText);
SkScalar scale = gSettings[i].fScale;
int n = p.getTextWidths(text, len, widths, rects);
SkScalar w = p.measureText(text, len, &bounds, scale);
p.setStyle(SkPaint::kFill_Style);
p.setColor(0x8888FF88);
canvas->drawRect(bounds, p);
p.setColor(0xFF000000);
canvas->drawText(text, len, 0, 0, p);
p.setStyle(SkPaint::kStroke_Style);
p.setStrokeWidth(0);
p.setColor(0xFFFF0000);
SkScalar x = 0;
for (int j = 0; j < n; j++) {
SkRect r = rects[j];
r.offset(x, 0);
canvas->drawRect(r, p);
x += widths[j];
}
p.setColor(0xFF0000FF);
canvas->drawLine(0, 0, w, 0, p);
p.setStrokeWidth(SkIntToScalar(4));
canvas->drawPoint(x, 0, p);
canvas->translate(0, dy);
}
}