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2681bee9ca
Closes https://github.com/flutter/flutter/issues/135057. This is a fair bit more involved than previous changes, just due to the sheer number of implicit conversions. Highlights: - Made `public uint32_t argb` `private uint32_t argb_`, and added `argb()` instead. - Added `ToSk(DlColor)` instead of using implicit conversions. There were a bunch of places where I had to make a judgement call (particularly in tests) to keep the code a bit "messy", i.e. `DlColor(SK_RED)`, just to make the diff as small as possible and to prevent silly copy and paste bugs. I'd be open to filing a follow-up issue to reduce unnecessary wrapping.
58 lines
1.8 KiB
C++
58 lines
1.8 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/flow/paint_utils.h"
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#include <stdlib.h>
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#include "third_party/skia/include/core/SkBitmap.h"
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#include "third_party/skia/include/core/SkImage.h"
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namespace flutter {
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namespace {
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std::shared_ptr<DlColorSource> CreateCheckerboardShader(SkColor c1,
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SkColor c2,
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int size) {
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SkBitmap bm;
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bm.allocN32Pixels(2 * size, 2 * size);
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bm.eraseColor(c1);
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bm.eraseArea(SkIRect::MakeLTRB(0, 0, size, size), c2);
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bm.eraseArea(SkIRect::MakeLTRB(size, size, 2 * size, 2 * size), c2);
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auto image = DlImage::Make(SkImages::RasterFromBitmap(bm));
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return std::make_shared<DlImageColorSource>(
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image, DlTileMode::kRepeat, DlTileMode::kRepeat,
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DlImageSampling::kNearestNeighbor);
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}
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} // anonymous namespace
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void DrawCheckerboard(DlCanvas* canvas, const SkRect& rect) {
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// Draw a checkerboard
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canvas->Save();
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canvas->ClipRect(rect, DlCanvas::ClipOp::kIntersect, false);
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// Secure random number generation isn't needed here.
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// NOLINTBEGIN(clang-analyzer-security.insecureAPI.rand)
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auto checkerboard_color =
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SkColorSetARGB(64, rand() % 256, rand() % 256, rand() % 256);
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// NOLINTEND(clang-analyzer-security.insecureAPI.rand)
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DlPaint paint;
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paint.setColorSource(
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CreateCheckerboardShader(checkerboard_color, 0x00000000, 12));
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canvas->DrawPaint(paint);
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canvas->Restore();
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// Stroke the drawn area
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DlPaint debug_paint;
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debug_paint.setStrokeWidth(8);
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debug_paint.setColor(DlColor(SkColorSetA(checkerboard_color, 255)));
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debug_paint.setDrawStyle(DlDrawStyle::kStroke);
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canvas->DrawRect(rect, debug_paint);
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}
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} // namespace flutter
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