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third_party
skia
docs
examples
Matrix_invert.cpp
Go to the documentation of this file.
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// Copyright 2019 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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// HASH=0e03cd9f154603ed4b21ca56d69dae44
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REG_FIDDLE
(Matrix_invert, 256, 128,
false
, 0) {
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void
draw
(
SkCanvas
* canvas) {
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const
SkPoint
src[] = { { 10, 120}, {120, 120}, {120, 10}, { 10, 10} };
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const
SkPoint
dst[] = { {150, 120}, {200, 100}, {240, 30}, { 130, 40} };
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SkPaint
paint
;
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paint
.setAntiAlias(
true
);
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SkMatrix
matrix;
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matrix.setPolyToPoly(src, dst, 4);
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canvas->
drawPoints
(
SkCanvas::kPolygon_PointMode
, 4, src,
paint
);
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canvas->
drawPoints
(
SkCanvas::kPolygon_PointMode
, 4, dst,
paint
);
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paint
.setColor(
SK_ColorBLUE
);
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paint
.setStrokeWidth(3);
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paint
.setStrokeCap(
SkPaint::kRound_Cap
);
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canvas->
drawPoints
(
SkCanvas::kPoints_PointMode
, 4, dst,
paint
);
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if
(matrix.invert(&matrix)) {
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canvas->
concat
(matrix);
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canvas->
drawPoints
(
SkCanvas::kPoints_PointMode
, 4, dst,
paint
);
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}
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}
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}
// END FIDDLE
SK_ColorBLUE
constexpr SkColor SK_ColorBLUE
Definition
SkColor.h:135
draw
static void draw(SkCanvas *canvas, SkRect &target, int x, int y)
Definition
aaclip.cpp:27
SkCanvas
Definition
SkCanvas.h:106
SkCanvas::drawPoints
void drawPoints(PointMode mode, size_t count, const SkPoint pts[], const SkPaint &paint)
Definition
SkCanvas.cpp:2034
SkCanvas::concat
void concat(const SkMatrix &matrix)
Definition
SkCanvas.cpp:1642
SkCanvas::kPolygon_PointMode
@ kPolygon_PointMode
draw the array of points as a open polygon
Definition
SkCanvas.h:1243
SkCanvas::kPoints_PointMode
@ kPoints_PointMode
draw each point separately
Definition
SkCanvas.h:1241
SkMatrix
Definition
SkMatrix.h:54
SkPaint
Definition
SkPaint.h:44
SkPaint::kRound_Cap
@ kRound_Cap
adds circle
Definition
SkPaint.h:335
paint
const Paint & paint
Definition
color_source.cc:38
examples.h
REG_FIDDLE
#define REG_FIDDLE(NAME, W, H, TEXT, I)
Definition
examples.h:60
SkPoint
Definition
SkPoint_impl.h:163
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