blob: 8a1f36d6d6621225f00449255139ab30437e320d [file] [log] [blame]
* Copyright 2016 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#include "gm.h"
#include "sk_tool_utils.h"
#include "SkCanvas.h"
#include "SkTextBlob.h"
namespace skiagm {
class TextBlobBlockReordering : public GM {
// This gm tests that textblobs translate properly when their draw order is different from their
// flush order
TextBlobBlockReordering() { }
void onOnceBeforeDraw() override {
SkTextBlobBuilder builder;
// make textblob
// Large text is used to trigger atlas eviction
SkPaint paint;
const char* text = "AB";
SkRect bounds;
paint.measureText(text, strlen(text), &bounds);
SkScalar yOffset = bounds.height();
sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, yOffset - 30);
// build
fBlob = builder.make();
SkString onShortName() override {
return SkString("textblobblockreordering");
SkISize onISize() override {
return SkISize::Make(kWidth, kHeight);
// This draws the same text blob 3 times. The second draw used a different xfer mode so its
// GrDrawOp doesn't get combined with the first and third. Ultimately, they will be flushed in
// the order first, third, and then second.
void onDraw(SkCanvas* canvas) override {
SkPaint paint;
canvas->translate(10, 40);
SkRect bounds = fBlob->bounds();
const int yDelta = SkScalarFloorToInt(bounds.height()) + 20;
const int xDelta = SkScalarFloorToInt(bounds.width());
canvas->drawTextBlob(fBlob, 0, 0, paint);
canvas->translate(SkIntToScalar(xDelta), SkIntToScalar(yDelta));
// Draw a rect where the text should be, and then twiddle the xfermode so we don't combine.
SkPaint redPaint;
canvas->drawRect(bounds, redPaint);
SkPaint srcInPaint(paint);
canvas->drawTextBlob(fBlob, 0, 0, srcInPaint);
canvas->translate(SkIntToScalar(xDelta), SkIntToScalar(yDelta));
canvas->drawTextBlob(fBlob, 0, 0, paint);
sk_sp<SkTextBlob> fBlob;
static constexpr int kWidth = 275;
static constexpr int kHeight = 200;
DEF_GM(return new TextBlobBlockReordering;)