skia2/docs/examples/Canvas_SrcRectConstraint.cpp
Hal Canary d88c2e8e09 Docs: rename examples files to match names
Change-Id: I9a6b2780cfdd91cdd16d5a08eb9ba1214492cb7e
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/201982
Commit-Queue: Hal Canary <halcanary@google.com>
Reviewed-by: Hal Canary <halcanary@google.com>
2019-03-19 18:49:22 +00:00

29 lines
1.2 KiB
C++

// Copyright 2019 Google LLC.
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
#include "fiddle/examples.h"
// HASH=5df49d1f4da37275a1f10ef7f1a749f0
REG_FIDDLE(Canvas_SrcRectConstraint, 256, 64, false, 0) {
void draw(SkCanvas* canvas) {
SkBitmap redBorder;
redBorder.allocPixels(SkImageInfo::MakeN32Premul(4, 4));
SkCanvas checkRed(redBorder);
checkRed.clear(SK_ColorRED);
uint32_t checkers[][2] = { { SK_ColorBLACK, SK_ColorWHITE },
{ SK_ColorWHITE, SK_ColorBLACK } };
checkRed.writePixels(
SkImageInfo::MakeN32Premul(2, 2), (void*) checkers, sizeof(checkers[0]), 1, 1);
canvas->scale(16, 16);
canvas->drawBitmap(redBorder, 0, 0, nullptr);
canvas->resetMatrix();
sk_sp<SkImage> image = SkImage::MakeFromBitmap(redBorder);
SkPaint lowPaint;
lowPaint.setFilterQuality(kLow_SkFilterQuality);
for (auto constraint : { SkCanvas::kStrict_SrcRectConstraint,
SkCanvas::kFast_SrcRectConstraint } ) {
canvas->translate(80, 0);
canvas->drawImageRect(image.get(), SkRect::MakeLTRB(1, 1, 3, 3),
SkRect::MakeLTRB(16, 16, 48, 48), &lowPaint, constraint);
}
}
} // END FIDDLE