skia2/gm/emptypath.cpp
Mike Reed ad5494d1d9 use pathbuilder
Change-Id: I11c18d4ff0e60cc33d742cf49359039395abc6b4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/313256
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2020-08-25 22:27:20 +00:00

192 lines
6.1 KiB
C++

/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm/gm.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColor.h"
#include "include/core/SkFont.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPathBuilder.h"
#include "include/core/SkPoint.h"
#include "include/core/SkRect.h"
#include "include/core/SkScalar.h"
#include "include/core/SkSize.h"
#include "include/core/SkString.h"
#include "include/core/SkTypeface.h"
#include "include/core/SkTypes.h"
#include "include/utils/SkRandom.h"
#include "tools/ToolUtils.h"
namespace skiagm {
class EmptyPathGM : public GM {
SkString onShortName() override { return SkString("emptypath"); }
SkISize onISize() override { return {600, 280}; }
void drawEmpty(SkCanvas* canvas,
SkColor color,
const SkRect& clip,
SkPaint::Style style,
SkPathFillType fill) {
SkPath path;
path.setFillType(fill);
SkPaint paint;
paint.setColor(color);
paint.setStyle(style);
canvas->save();
canvas->clipRect(clip);
canvas->drawPath(path, paint);
canvas->restore();
}
void onDraw(SkCanvas* canvas) override {
struct FillAndName {
SkPathFillType fFill;
const char* fName;
};
constexpr FillAndName gFills[] = {
{SkPathFillType::kWinding, "Winding"},
{SkPathFillType::kEvenOdd, "Even / Odd"},
{SkPathFillType::kInverseWinding, "Inverse Winding"},
{SkPathFillType::kInverseEvenOdd, "Inverse Even / Odd"},
};
struct StyleAndName {
SkPaint::Style fStyle;
const char* fName;
};
constexpr StyleAndName gStyles[] = {
{SkPaint::kFill_Style, "Fill"},
{SkPaint::kStroke_Style, "Stroke"},
{SkPaint::kStrokeAndFill_Style, "Stroke And Fill"},
};
SkFont font(ToolUtils::create_portable_typeface(), 15);
const char title[] = "Empty Paths Drawn Into Rectangle Clips With "
"Indicated Style and Fill";
canvas->drawString(title, 20.0f, 20.0f, font, SkPaint());
SkRandom rand;
SkRect rect = SkRect::MakeWH(100*SK_Scalar1, 30*SK_Scalar1);
int i = 0;
canvas->save();
canvas->translate(10 * SK_Scalar1, 0);
canvas->save();
for (size_t style = 0; style < SK_ARRAY_COUNT(gStyles); ++style) {
for (size_t fill = 0; fill < SK_ARRAY_COUNT(gFills); ++fill) {
if (0 == i % 4) {
canvas->restore();
canvas->translate(0, rect.height() + 40 * SK_Scalar1);
canvas->save();
} else {
canvas->translate(rect.width() + 40 * SK_Scalar1, 0);
}
++i;
SkColor color = rand.nextU();
color = 0xff000000 | color; // force solid
color = ToolUtils::color_to_565(color);
this->drawEmpty(canvas, color, rect,
gStyles[style].fStyle, gFills[fill].fFill);
SkPaint rectPaint;
rectPaint.setColor(SK_ColorBLACK);
rectPaint.setStyle(SkPaint::kStroke_Style);
rectPaint.setStrokeWidth(-1);
rectPaint.setAntiAlias(true);
canvas->drawRect(rect, rectPaint);
SkPaint labelPaint;
labelPaint.setColor(color);
SkFont labelFont(ToolUtils::create_portable_typeface(), 12);
canvas->drawString(gStyles[style].fName, 0, rect.height() + 15.0f,
labelFont, labelPaint);
canvas->drawString(gFills[fill].fName, 0, rect.height() + 28.0f,
labelFont, labelPaint);
}
}
canvas->restore();
canvas->restore();
}
};
DEF_GM( return new EmptyPathGM; )
//////////////////////////////////////////////////////////////////////////////
static constexpr int kPtsCount = 3;
static constexpr SkPoint kPts[kPtsCount] = {
{40, 40},
{80, 40},
{120, 40},
};
static SkPath make_path_move() {
SkPathBuilder builder;
for (SkPoint p : kPts) {
builder.moveTo(p);
}
return builder.detach();
}
static SkPath make_path_move_close() {
SkPathBuilder builder;
for (SkPoint p : kPts) {
builder.moveTo(p).close();
}
return builder.detach();
}
static SkPath make_path_move_line() {
SkPathBuilder builder;
for (SkPoint p : kPts) {
builder.moveTo(p).lineTo(p);
}
return builder.detach();
}
static SkPath make_path_move_mix() {
return SkPathBuilder().moveTo(kPts[0])
.moveTo(kPts[1]).close()
.moveTo(kPts[2]).lineTo(kPts[2])
.detach();
}
class EmptyStrokeGM : public GM {
SkString onShortName() override { return SkString("emptystroke"); }
SkISize onISize() override { return {200, 240}; }
void onDraw(SkCanvas* canvas) override {
static constexpr SkPath (*kProcs[])() = {
make_path_move, // expect red red red
make_path_move_close, // expect black black black
make_path_move_line, // expect black black black
make_path_move_mix, // expect red black black,
};
SkPaint strokePaint;
strokePaint.setStyle(SkPaint::kStroke_Style);
strokePaint.setStrokeWidth(21);
strokePaint.setStrokeCap(SkPaint::kSquare_Cap);
SkPaint dotPaint;
dotPaint.setColor(SK_ColorRED);
strokePaint.setStyle(SkPaint::kStroke_Style);
dotPaint.setStrokeWidth(7);
for (auto proc : kProcs) {
canvas->drawPoints(SkCanvas::kPoints_PointMode, kPtsCount, kPts, dotPaint);
canvas->drawPath(proc(), strokePaint);
canvas->translate(0, 40);
}
}
};
DEF_GM( return new EmptyStrokeGM; )
} // namespace skiagm