1 // Copyright 2019 Google LLC.
2 // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3 #include "tools/fiddle/examples.h"
4 REG_FIDDLE(Canvas_SrcRectConstraint, 256, 64, false, 0) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6 SkBitmap redBorder;
7 redBorder.allocPixels(SkImageInfo::MakeN32Premul(4, 4));
8 SkCanvas checkRed(redBorder);
9 checkRed.clear(SK_ColorRED);
10 uint32_t checkers[][2] = { { SK_ColorBLACK, SK_ColorWHITE },
11 { SK_ColorWHITE, SK_ColorBLACK } };
12 checkRed.writePixels(
13 SkImageInfo::MakeN32Premul(2, 2), (void*) checkers, sizeof(checkers[0]), 1, 1);
14 canvas->scale(16, 16);
15 canvas->drawImage(redBorder.asImage(), 0, 0);
16 canvas->resetMatrix();
17 sk_sp<SkImage> image = redBorder.asImage();
18 for (auto constraint : { SkCanvas::kStrict_SrcRectConstraint,
19 SkCanvas::kFast_SrcRectConstraint } ) {
20 canvas->translate(80, 0);
21 canvas->drawImageRect(image.get(), SkRect::MakeLTRB(1, 1, 3, 3),
22 SkRect::MakeLTRB(16, 16, 48, 48),
23 SkSamplingOptions(SkFilterMode::kLinear), nullptr, constraint);
24 }
25 }
26 } // END FIDDLE
27