60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
// Copyright 2020 Google LLC.
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// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
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#include "tools/fiddle/examples.h"
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REG_FIDDLE(purplestamp, 256, 256, false, 0) {
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// purplestamp
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// Whether to use a separate bitmap (with a color type) at all.
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bool drawWithRasterImage = true;
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// This works with either kN32_SkColorType or kAlpha_8_SkColorType.
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// Applies only if drawWithRasterImage is true.
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SkColorType colorType = kN32_SkColorType;
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void drawStamp(SkCanvas* canvas, int size) {
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canvas->save();
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canvas->clipRect(SkRect::MakeWH(size, size), SkClipOp::kIntersect, true);
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canvas->clear(0x3F000000 /* translucent black */);
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setColor(SK_ColorBLACK);
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canvas->drawRRect(
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SkRRect::MakeOval(SkRect::MakeXYWH(size / 4, size / 4, size / 2, size / 2)), paint);
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(20);
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canvas->drawRect(SkRect::MakeWH(size, size), paint);
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canvas->restore();
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}
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sk_sp<SkImage> stampImage(int size) {
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sk_sp<SkSurface> surface = SkSurface::MakeRaster(
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SkImageInfo::Make(size, size, colorType, kPremul_SkAlphaType));
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drawStamp(surface->getCanvas(), size);
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return surface->makeImageSnapshot();
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}
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void draw(SkCanvas* canvas) {
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SkPaint paint;
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paint.setColorFilter(SkColorFilters::Blend(0xFF7F00FF, SkBlendMode::kSrcIn));
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paint.setAntiAlias(true);
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SkSamplingOptions sampling(SkFilterMode::kLinear, SkMipmapMode::kLinear);
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canvas->rotate(30);
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canvas->translate(60, 0);
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int stampSize = 200;
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if (drawWithRasterImage) {
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canvas->drawImage(stampImage(stampSize), 0, 0, sampling, &paint);
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} else {
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canvas->saveLayer(nullptr, &paint);
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drawStamp(canvas, stampSize);
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canvas->restore();
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}
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}
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} // END FIDDLE
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