blob: 53b936f2b5713d09be23aebc375c53eceb9731fd [file] [log] [blame]
* Copyright 2013 Google Inc.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
#include "gm/gm.h"
#include "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkImage.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPath.h"
#include "include/core/SkRect.h"
#include "include/core/SkScalar.h"
static sk_sp<SkImage> make_bm() {
SkBitmap bm;
bm.allocN32Pixels(60, 60);
SkCanvas canvas(bm);
SkPaint paint;
canvas.drawPath(SkPath::Polygon({{6,6}, {6,54}, {30,54}}, false), paint);
canvas.drawRect(SkRect::MakeLTRB(0.5f, 0.5f, 59.5f, 59.5f), paint);
return bm.asImage();
// This creates a close, but imperfect concatenation of
// scaling the image up by its dst-rect
// scaling the image down by the matrix' scale
// The bug was that for cases like this, we were incorrectly trying to take a
// fast-path in the bitmapshader, but ended up drawing the last col of pixels
// twice. The fix resulted in (a) not taking the fast-path, but (b) drawing
// the image correctly.
DEF_SIMPLE_GM(bitmaprecttest, canvas, 320, 240) {
auto image = make_bm();
canvas->drawImage(image, 150, 45);
SkScalar scale = 0.472560018f;
canvas->scale(scale, scale);
canvas->drawImageRect(image, SkRect::MakeXYWH(100, 100, 128, 128), SkSamplingOptions());
canvas->scale(-1, 1);
canvas->drawImage(image, -310, 45);