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third_party
skia
docs
examples
Matrix_mapXY.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=9e50185d502dc6903783679a84106089
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REG_FIDDLE
(Matrix_mapXY, 256, 256,
false
, 0) {
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void
draw
(
SkCanvas
* canvas) {
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SkPaint
paint
;
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paint
.setAntiAlias(
true
);
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SkMatrix
matrix;
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matrix.setRotate(60, 128, 128);
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SkPoint
lines[] = {{50, 50}, {150, 50}, {150, 150}};
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for
(
size_t
i = 0; i < std::size(lines); ++i) {
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SkPoint
pt;
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matrix.mapXY(lines[i].fX, lines[i].fY, &pt);
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canvas->
drawCircle
(pt.
fX
, pt.
fY
, 3,
paint
);
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}
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canvas->
concat
(matrix);
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canvas->
drawPoints
(
SkCanvas::kPolygon_PointMode
, std::size(lines), lines,
paint
);
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}
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}
// END FIDDLE
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::drawCircle
void drawCircle(SkScalar cx, SkScalar cy, SkScalar radius, const SkPaint &paint)
Definition
SkCanvas.cpp:3134
SkMatrix
Definition
SkMatrix.h:54
SkPaint
Definition
SkPaint.h:44
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
SkPoint::fX
float fX
x-axis value
Definition
SkPoint_impl.h:164
SkPoint::fY
float fY
y-axis value
Definition
SkPoint_impl.h:165
Generated on Fri Apr 26 2024 06:15:43 for Flutter Engine by
1.9.8