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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 "SkView.h"
#include "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkGraphics.h"
#include "SkImageDecoder.h"
#include "SkPath.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "SkXfermode.h"
#include "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkTime.h"
#include "SkTypeface.h"
#include "SkOSFile.h"
#include "SkStream.h"
#define INT_SIZE 64
#define SCALAR_SIZE SkIntToScalar(INT_SIZE)
static void make_bitmap(SkBitmap* bitmap) {
bitmap->allocN32Pixels(INT_SIZE, INT_SIZE);
SkCanvas canvas(*bitmap);
canvas.drawColor(SK_ColorRED);
SkPaint paint;
paint.setAntiAlias(true);
const SkPoint pts[] = { { 0, 0 }, { SCALAR_SIZE, SCALAR_SIZE } };
const SkColor colors[] = { SK_ColorWHITE, SK_ColorBLUE };
paint.setShader(SkGradientShader::CreateLinear(pts, colors, NULL, 2,
SkShader::kClamp_TileMode))->unref();
canvas.drawCircle(SCALAR_SIZE/2, SCALAR_SIZE/2, SCALAR_SIZE/2, paint);
}
static SkPoint unit_vec(int degrees) {
SkScalar rad = SkDegreesToRadians(SkIntToScalar(degrees));
SkScalar s, c;
s = SkScalarSinCos(rad, &c);
return SkPoint::Make(c, s);
}
static void bounce(SkScalar* value, SkScalar* delta, SkScalar min, SkScalar max) {
*value += *delta;
if (*value < min) {
*value = min;
*delta = - *delta;
} else if (*value > max) {
*value = max;
*delta = - *delta;
}
}
static void bounce_pt(SkPoint* pt, SkVector* vec, const SkRect& limit) {
bounce(&pt->fX, &vec->fX, limit.fLeft, limit.fRight);
bounce(&pt->fY, &vec->fY, limit.fTop, limit.fBottom);
}
class BitmapRectView : public SampleView {
SkPoint fSrcPts[2];
SkPoint fSrcVec[2];
SkRect fSrcLimit;
SkRect fDstR[2];
void bounce() {
bounce_pt(&fSrcPts[0], &fSrcVec[0], fSrcLimit);
bounce_pt(&fSrcPts[1], &fSrcVec[1], fSrcLimit);
}
public:
BitmapRectView() {
this->setBGColor(SK_ColorGRAY);
fSrcPts[0].set(0, 0);
fSrcPts[1].set(SCALAR_SIZE, SCALAR_SIZE);
fSrcVec[0] = unit_vec(30);
fSrcVec[1] = unit_vec(107);
fSrcLimit.set(-SCALAR_SIZE/4, -SCALAR_SIZE/4,
SCALAR_SIZE*5/4, SCALAR_SIZE*5/4);
fDstR[0] = SkRect::MakeXYWH(SkIntToScalar(10), SkIntToScalar(100),
SkIntToScalar(250), SkIntToScalar(300));
fDstR[1] = fDstR[0];
fDstR[1].offset(fDstR[0].width() * 5/4, 0);
fSrcPts[0].set(32, 32);
fSrcPts[1].set(90, 90);
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "BitmapRect");
return true;
}
return this->INHERITED::onQuery(evt);
}
virtual void onDrawContent(SkCanvas* canvas) {
SkRect srcR;
srcR.set(fSrcPts[0], fSrcPts[1]);
srcR = SkRect::MakeXYWH(fSrcPts[0].fX, fSrcPts[0].fY, 32, 32);
srcR.offset(-srcR.width()/2, -srcR.height()/2);
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(SK_ColorYELLOW);
SkBitmap bitmap;
make_bitmap(&bitmap);
canvas->translate(20, 20);
canvas->drawBitmap(bitmap, 0, 0, &paint);
canvas->drawRect(srcR, paint);
for (int i = 0; i < 2; ++i) {
paint.setFilterLevel(1 == i ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel);
canvas->drawBitmapRectToRect(bitmap, &srcR, fDstR[i], &paint);
canvas->drawRect(fDstR[i], paint);
}
this->bounce();
this->inval(NULL);
}
private:
typedef SkView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static void make_big_bitmap(SkBitmap* bm) {
static const char gText[] =
"We the people, in order to form a more perfect union, establish justice,"
" ensure domestic tranquility, provide for the common defense, promote the"
" general welfare and ensure the blessings of liberty to ourselves and our"
" posterity, do ordain and establish this constitution for the United"
" States of America.";
const int BIG_H = 120;
SkPaint paint;
paint.setAntiAlias(true);
paint.setTextSize(SkIntToScalar(BIG_H));
const int BIG_W = SkScalarRoundToInt(paint.measureText(gText, strlen(gText)));
bm->allocN32Pixels(BIG_W, BIG_H);
bm->eraseColor(SK_ColorWHITE);
SkCanvas canvas(*bm);
canvas.drawText(gText, strlen(gText), 0, paint.getTextSize()*4/5, paint);
}
class BitmapRectView2 : public SampleView {
SkBitmap fBitmap;
SkRect fSrcR;
SkRect fLimitR;
SkScalar fDX;
SkRect fDstR[2];
void bounceMe() {
SkScalar width = fSrcR.width();
bounce(&fSrcR.fLeft, &fDX, fLimitR.fLeft, fLimitR.fRight - width);
fSrcR.fRight = fSrcR.fLeft + width;
}
public:
BitmapRectView2() {
make_big_bitmap(&fBitmap);
this->setBGColor(SK_ColorGRAY);
fSrcR.fLeft = 0;
fSrcR.fTop = 0;
fSrcR.fRight = SkIntToScalar(fBitmap.height()) * 3;
fSrcR.fBottom = SkIntToScalar(fBitmap.height());
fLimitR.set(0, 0,
SkIntToScalar(fBitmap.width()),
SkIntToScalar(fBitmap.height()));
fDX = SK_Scalar1;
fDstR[0] = SkRect::MakeXYWH(SkIntToScalar(20), SkIntToScalar(20),
SkIntToScalar(600), SkIntToScalar(200));
fDstR[1] = fDstR[0];
fDstR[1].offset(0, fDstR[0].height() * 5/4);
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "BigBitmapRect");
return true;
}
return this->INHERITED::onQuery(evt);
}
virtual void onDrawContent(SkCanvas* canvas) {
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(SK_ColorYELLOW);
for (int i = 0; i < 2; ++i) {
paint.setFilterLevel(1 == i ? SkPaint::kLow_FilterLevel : SkPaint::kNone_FilterLevel);
canvas->drawBitmapRectToRect(fBitmap, &fSrcR, fDstR[i], &paint);
canvas->drawRect(fDstR[i], paint);
}
this->bounceMe();
this->inval(NULL);
}
private:
typedef SkView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* F0() { return new BitmapRectView; }
static SkView* F1() { return new BitmapRectView2; }
static SkViewRegister gR0(F0);
static SkViewRegister gR1(F1);
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