void test_split_layers()
{
printf("test_split_layer\n");
int i;
layers_t *l = make_layers(2);
alloc_layers(l, 5, 10);
for(i=0; i < l->len; i++) {
stripe_set_inc(l->layers[i]->stripes[0], 0.0);
}
dump_layers(l);
split_layers(l, 2);
dump_layers(l);
merge_layers(l);
dump_layers(l);
free_layers(l);
}
static void dump_layers(const SkLayer* layer, int tab = 0) {
SkMatrix matrix;
SkString matrixStr;
layer->getLocalTransform(&matrix);
matrix.toDumpString(&matrixStr);
for (int j = 0; j < tab; j++) {
SkDebugf(" ");
}
SkDebugf("layer=%p parent=%p size=[%g %g] transform=%s\n",
layer, layer->getParent(), layer->getWidth(), layer->getHeight(),
matrixStr.c_str());
for (int i = 0; i < layer->countChildren(); i++) {
dump_layers(layer->getChild(i), tab + 4);
}
}
// test drawing with strips of fading gradient above and below
static void test_fade(SkCanvas* canvas) {
SkAutoCanvasRestore ar(canvas, true);
SkRect r;
SkPaint p;
p.setAlpha(0x88);
SkAutoCanvasRestore(canvas, false);
// create the layers
r.set(0, 0, SkIntToScalar(100), SkIntToScalar(100));
canvas->clipRect(r);
r.fBottom = SkIntToScalar(20);
canvas->saveLayer(&r, NULL, (SkCanvas::SaveFlags)(SkCanvas::kHasAlphaLayer_SaveFlag | SkCanvas::kFullColorLayer_SaveFlag));
r.fTop = SkIntToScalar(80);
r.fBottom = SkIntToScalar(100);
canvas->saveLayer(&r, NULL, (SkCanvas::SaveFlags)(SkCanvas::kHasAlphaLayer_SaveFlag | SkCanvas::kFullColorLayer_SaveFlag));
// now draw the "content"
if (true) {
r.set(0, 0, SkIntToScalar(100), SkIntToScalar(100));
canvas->saveLayerAlpha(&r, 0x80);
SkPaint p;
p.setColor(SK_ColorRED);
p.setAntiAlias(true);
canvas->drawOval(r, p);
dump_layers("inside layer alpha", canvas);
canvas->restore();
} else {
r.set(0, 0, SkIntToScalar(100), SkIntToScalar(100));
SkPaint p;
p.setColor(SK_ColorRED);
p.setAntiAlias(true);
canvas->drawOval(r, p);
}
// return;
dump_layers("outside layer alpha", canvas);
// now apply an effect
SkPaint paint;
make_paint(&paint);
r.set(0, 0, SkIntToScalar(100), SkIntToScalar(20));
// SkDebugf("--------- draw top grad\n");
canvas->drawRect(r, paint);
SkMatrix m;
SkShader* s = paint.getShader();
m.setScale(SK_Scalar1, -SK_Scalar1);
m.postTranslate(0, SkIntToScalar(100));
s->setLocalMatrix(m);
r.fTop = SkIntToScalar(80);
r.fBottom = SkIntToScalar(100);
// SkDebugf("--------- draw bot grad\n");
canvas->drawRect(r, paint);
}
