/*
* 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 "SkFont.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_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);
}
SkFont font(sk_tool_utils::create_portable_typeface(), wScalar / 2.2f);
paint.setShader(nullptr);
paint.setColor(SK_ColorLTGRAY);
constexpr char kTxt[] = "Skia";
SkPoint texPos = { wScalar / 17, hScalar / 2 + font.getSize() / 2.5f };
canvas.drawSimpleText(kTxt, SK_ARRAY_COUNT(kTxt)-1, kUTF8_SkTextEncoding,
texPos.fX, texPos.fY, font, paint);
paint.setColor(SK_ColorBLACK);
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SK_Scalar1);
canvas.drawSimpleText(kTxt, SK_ARRAY_COUNT(kTxt)-1, kUTF8_SkTextEncoding,
texPos.fX, texPos.fY, font, 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!";
SkFont font(sk_tool_utils::create_portable_typeface(), 23);
SkScalar textW = font.measureText(kTxt, SK_ARRAY_COUNT(kTxt)-1, kUTF8_SkTextEncoding);
SkPaint txtPaint;
txtPaint.setColor(SK_ColorDKGRAY);
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->drawSimpleText(kTxt, SK_ARRAY_COUNT(kTxt)-1, kUTF8_SkTextEncoding,
0, 1.5f * font.getSize(), font, 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;)
}