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/*
* 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 "SampleCode.h"
#include "SkCanvas.h"
#include "SkColorPriv.h"
#include "SkGradientShader.h"
#include "SkPath.h"
#include "SkUtils.h"
#include "SkView.h"
static void draw_rect(SkCanvas* canvas, const SkRect& r, const SkPaint& p) {
canvas->drawRect(r, p);
SkPaint frame(p);
frame.setShader(nullptr);
frame.setStyle(SkPaint::kStroke_Style);
canvas->drawRect(r, frame);
}
static void draw_gradient(SkCanvas* canvas) {
SkRect r = { 0, 0, SkIntToScalar(256), SkIntToScalar(32) };
SkPoint pts[] = { { r.fLeft, r.fTop }, { r.fRight, r.fTop } };
SkColor colors[] = { 0xFF000000, 0xFFFF0000 };
SkShader* s = SkGradientShader::CreateLinear(pts, colors, nullptr, 2,
SkShader::kClamp_TileMode);
SkPaint p;
p.setShader(s)->unref();
draw_rect(canvas, r, p);
canvas->translate(0, SkIntToScalar(40));
p.setDither(true);
draw_rect(canvas, r, p);
}
static bool test_pathregion() {
SkPath path;
SkRegion region;
path.moveTo(25071800.f, -141823808.f);
path.lineTo(25075500.f, -141824000.f);
path.lineTo(25075400.f, -141827712.f);
path.lineTo(25071810.f, -141827600.f);
path.close();
SkIRect bounds;
path.getBounds().round(&bounds);
SkRegion clip(bounds);
return region.setPath(path, clip); // <-- !! DOWN !!
}
static SkBitmap make_bitmap() {
SkPMColor c[256];
for (int i = 0; i < 256; i++) {
c[i] = SkPackARGB32(0xFF, i, 0, 0);
}
SkColorTable* ctable = new SkColorTable(c, 256);
SkBitmap bm;
bm.allocPixels(SkImageInfo::Make(256, 32, kIndex_8_SkColorType, kPremul_SkAlphaType),
nullptr, ctable);
ctable->unref();
bm.lockPixels();
for (int y = 0; y < bm.height(); y++) {
uint8_t* p = bm.getAddr8(0, y);
for (int x = 0; x < 256; x++) {
p[x] = x;
}
}
bm.unlockPixels();
return bm;
}
class DitherBitmapView : public SampleView {
SkBitmap fBM8;
SkBitmap fBM32;
bool fResult;
public:
DitherBitmapView() {
fResult = test_pathregion();
fBM8 = make_bitmap();
fBM8.copyTo(&fBM32, kN32_SkColorType);
this->setBGColor(0xFFDDDDDD);
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "DitherBitmap");
return true;
}
return this->INHERITED::onQuery(evt);
}
static void setBitmapOpaque(SkBitmap* bm, bool isOpaque) {
SkAutoLockPixels alp(*bm); // needed for ctable
bm->setAlphaType(isOpaque ? kOpaque_SkAlphaType : kPremul_SkAlphaType);
}
static void draw2(SkCanvas* canvas, const SkBitmap& bm) {
SkPaint paint;
SkBitmap bitmap(bm);
setBitmapOpaque(&bitmap, false);
paint.setDither(false);
canvas->drawBitmap(bitmap, 0, 0, &paint);
paint.setDither(true);
canvas->drawBitmap(bitmap, 0, SkIntToScalar(bm.height() + 10), &paint);
setBitmapOpaque(&bitmap, true);
SkScalar x = SkIntToScalar(bm.width() + 10);
paint.setDither(false);
canvas->drawBitmap(bitmap, x, 0, &paint);
paint.setDither(true);
canvas->drawBitmap(bitmap, x, SkIntToScalar(bm.height() + 10), &paint);
}
virtual void onDrawContent(SkCanvas* canvas) {
canvas->translate(SkIntToScalar(20), SkIntToScalar(20));
draw2(canvas, fBM8);
canvas->translate(0, SkIntToScalar(fBM8.height() *3));
draw2(canvas, fBM32);
canvas->translate(0, SkIntToScalar(fBM8.height() *3));
draw_gradient(canvas);
char resultTrue[] = "SkRegion::setPath returned true";
char resultFalse[] = "SkRegion::setPath returned false";
SkPaint p;
if (fResult)
canvas->drawText(resultTrue, sizeof(resultTrue) - 1, 0, 50, p);
else
canvas->drawText(resultFalse, sizeof(resultFalse) - 1, 0, 50, p);
}
private:
typedef SampleView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new DitherBitmapView; }
static SkViewRegister reg(MyFactory);
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