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c110e7941e
skia2/gm/convexpolyclip.cpp
Ben Wagner a93a14a998 Convert NULL and 0 to nullptr. 
This was created by looking at warnings produced by clang's
-Wzero-as-null-pointer-constant. This updates most issues in
Skia code. However, there are places where GL and Vulkan want
pointer values which are explicitly 0, external headers which
use NULL directly, and possibly more uses in un-compiled
sources (for other platforms).

Change-Id: Id22fbac04d5c53497a53d734f0896b4f06fe8345
Reviewed-on: https://skia-review.googlesource.com/39521
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Ben Wagner <bungeman@google.com>
2017-08-28 17:48:57 +00:00

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9.7 KiB
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/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "sk_tool_utils.h"
#include "SkBitmap.h"
#include "SkGradientShader.h"
#include "SkPath.h"
#include "SkTLList.h"
static SkBitmap make_bmp(int w, int h) {
SkBitmap bmp;
bmp.allocN32Pixels(w, h, true);
SkCanvas canvas(bmp);
SkScalar wScalar = SkIntToScalar(w);
SkScalar hScalar = SkIntToScalar(h);
SkPoint pt = { wScalar / 2, hScalar / 2 };
SkScalar radius = 3 * SkMaxScalar(wScalar, hScalar);
SkColor colors[] = { sk_tool_utils::color_to_565(SK_ColorDKGRAY),
sk_tool_utils::color_to_565(0xFF222255),
sk_tool_utils::color_to_565(0xFF331133),
sk_tool_utils::color_to_565(0xFF884422),
sk_tool_utils::color_to_565(0xFF000022), SK_ColorWHITE,
sk_tool_utils::color_to_565(0xFFAABBCC) };
SkScalar pos[] = {0,
SK_Scalar1 / 6,
2 * SK_Scalar1 / 6,
3 * SK_Scalar1 / 6,
4 * SK_Scalar1 / 6,
5 * SK_Scalar1 / 6,
SK_Scalar1};
SkPaint paint;
SkRect rect = SkRect::MakeWH(wScalar, hScalar);
SkMatrix mat = SkMatrix::I();
for (int i = 0; i < 4; ++i) {
paint.setShader(SkGradientShader::MakeRadial(
pt, radius,
colors, pos,
SK_ARRAY_COUNT(colors),
SkShader::kRepeat_TileMode,
0, &mat));
canvas.drawRect(rect, paint);
rect.inset(wScalar / 8, hScalar / 8);
mat.preTranslate(6 * wScalar, 6 * hScalar);
mat.postScale(SK_Scalar1 / 3, SK_Scalar1 / 3);
}
paint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&paint);
paint.setTextSize(wScalar / 2.2f);
paint.setShader(nullptr);
paint.setColor(sk_tool_utils::color_to_565(SK_ColorLTGRAY));
constexpr char kTxt[] = "Skia";
SkPoint texPos = { wScalar / 17, hScalar / 2 + paint.getTextSize() / 2.5f };
canvas.drawText(kTxt, SK_ARRAY_COUNT(kTxt)-1, texPos.fX, texPos.fY, paint);
paint.setColor(SK_ColorBLACK);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SK_Scalar1);
canvas.drawText(kTxt, SK_ARRAY_COUNT(kTxt)-1, texPos.fX, texPos.fY, paint);
return bmp;
}
namespace skiagm {
/**
* This GM tests convex polygon clips.
*/
class ConvexPolyClip : public GM {
public:
ConvexPolyClip() {
this->setBGColor(0xFFFFFFFF);
}
protected:
SkString onShortName() override {
return SkString("convex_poly_clip");
}
SkISize onISize() override {
// When benchmarking the saveLayer set of draws is skipped.
int w = 435;
if (kBench_Mode != this->getMode()) {
w *= 2;
}
return SkISize::Make(w, 540);
}
void onOnceBeforeDraw() override {
SkPath tri;
tri.moveTo(5.f, 5.f);
tri.lineTo(100.f, 20.f);
tri.lineTo(15.f, 100.f);
fClips.addToTail()->setPath(tri);
SkPath hexagon;
constexpr SkScalar kRadius = 45.f;
const SkPoint center = { kRadius, kRadius };
for (int i = 0; i < 6; ++i) {
SkScalar angle = 2 * SK_ScalarPI * i / 6;
SkPoint point;
point.fY = SkScalarSinCos(angle, &point.fX);
point.scale(kRadius);
point = center + point;
if (0 == i) {
hexagon.moveTo(point);
} else {
hexagon.lineTo(point);
}
}
fClips.addToTail()->setPath(hexagon);
SkMatrix scaleM;
scaleM.setScale(1.1f, 0.4f, kRadius, kRadius);
hexagon.transform(scaleM);
fClips.addToTail()->setPath(hexagon);
fClips.addToTail()->setRect(SkRect::MakeXYWH(8.3f, 11.6f, 78.2f, 72.6f));
SkPath rotRect;
SkRect rect = SkRect::MakeLTRB(10.f, 12.f, 80.f, 86.f);
rotRect.addRect(rect);
SkMatrix rotM;
rotM.setRotate(23.f, rect.centerX(), rect.centerY());
rotRect.transform(rotM);
fClips.addToTail()->setPath(rotRect);
fBmp = make_bmp(100, 100);
}
void onDraw(SkCanvas* canvas) override {
SkScalar y = 0;
constexpr SkScalar kMargin = 10.f;
SkPaint bgPaint;
bgPaint.setAlpha(0x15);
SkISize size = canvas->getBaseLayerSize();
canvas->drawBitmapRect(fBmp, SkRect::MakeIWH(size.fWidth, size.fHeight), &bgPaint);
constexpr char kTxt[] = "Clip Me!";
SkPaint txtPaint;
txtPaint.setTextSize(23.f);
txtPaint.setAntiAlias(true);
sk_tool_utils::set_portable_typeface(&txtPaint);
txtPaint.setColor(sk_tool_utils::color_to_565(SK_ColorDKGRAY));
SkScalar textW = txtPaint.measureText(kTxt, SK_ARRAY_COUNT(kTxt)-1);
SkScalar startX = 0;
int testLayers = kBench_Mode != this->getMode();
for (int doLayer = 0; doLayer <= testLayers; ++doLayer) {
for (ClipList::Iter iter(fClips, ClipList::Iter::kHead_IterStart);
iter.get();
iter.next()) {
const Clip* clip = iter.get();
SkScalar x = startX;
for (int aa = 0; aa < 2; ++aa) {
if (doLayer) {
SkRect bounds;
clip->getBounds(&bounds);
bounds.outset(2, 2);
bounds.offset(x, y);
canvas->saveLayer(&bounds, nullptr);
} else {
canvas->save();
}
canvas->translate(x, y);
clip->setOnCanvas(canvas, kIntersect_SkClipOp, SkToBool(aa));
canvas->drawBitmap(fBmp, 0, 0);
canvas->restore();
x += fBmp.width() + kMargin;
}
for (int aa = 0; aa < 2; ++aa) {
SkPaint clipOutlinePaint;
clipOutlinePaint.setAntiAlias(true);
clipOutlinePaint.setColor(0x50505050);
clipOutlinePaint.setStyle(SkPaint::kStroke_Style);
clipOutlinePaint.setStrokeWidth(0);
if (doLayer) {
SkRect bounds;
clip->getBounds(&bounds);
bounds.outset(2, 2);
bounds.offset(x, y);
canvas->saveLayer(&bounds, nullptr);
} else {
canvas->save();
}
canvas->translate(x, y);
SkPath closedClipPath;
clip->asClosedPath(&closedClipPath);
canvas->drawPath(closedClipPath, clipOutlinePaint);
clip->setOnCanvas(canvas, kIntersect_SkClipOp, SkToBool(aa));
canvas->scale(1.f, 1.8f);
canvas->drawText(kTxt, SK_ARRAY_COUNT(kTxt)-1,
0, 1.5f * txtPaint.getTextSize(),
txtPaint);
canvas->restore();
x += textW + 2 * kMargin;
}
y += fBmp.height() + kMargin;
}
y = 0;
startX += 2 * fBmp.width() + SkScalarCeilToInt(2 * textW) + 6 * kMargin;
}
}
bool runAsBench() const override { return true; }
private:
class Clip {
public:
enum ClipType {
kNone_ClipType,
kPath_ClipType,
kRect_ClipType
};
Clip () : fClipType(kNone_ClipType) {}
void setOnCanvas(SkCanvas* canvas, SkClipOp op, bool aa) const {
switch (fClipType) {
case kPath_ClipType:
canvas->clipPath(fPath, op, aa);
break;
case kRect_ClipType:
canvas->clipRect(fRect, op, aa);
break;
case kNone_ClipType:
SkDEBUGFAIL("Uninitialized Clip.");
break;
}
}
void asClosedPath(SkPath* path) const {
switch (fClipType) {
case kPath_ClipType:
*path = fPath;
path->close();
break;
case kRect_ClipType:
path->reset();
path->addRect(fRect);
break;
case kNone_ClipType:
SkDEBUGFAIL("Uninitialized Clip.");
break;
}
}
void setPath(const SkPath& path) {
fClipType = kPath_ClipType;
fPath = path;
}
void setRect(const SkRect& rect) {
fClipType = kRect_ClipType;
fRect = rect;
fPath.reset();
}
ClipType getType() const { return fClipType; }
void getBounds(SkRect* bounds) const {
switch (fClipType) {
case kPath_ClipType:
*bounds = fPath.getBounds();
break;
case kRect_ClipType:
*bounds = fRect;
break;
case kNone_ClipType:
SkDEBUGFAIL("Uninitialized Clip.");
break;
}
}
private:
ClipType fClipType;
SkPath fPath;
SkRect fRect;
};
typedef SkTLList<Clip, 1> ClipList;
ClipList fClips;
SkBitmap fBmp;
typedef GM INHERITED;
};
DEF_GM(return new ConvexPolyClip;)
}
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