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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 "include/core/SkBitmap.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColorFilter.h"
#include "include/core/SkColorPriv.h"
#include "include/core/SkFont.h"
#include "include/core/SkGraphics.h"
#include "include/core/SkPath.h"
#include "include/core/SkRegion.h"
#include "include/core/SkShader.h"
#include "include/core/SkTime.h"
#include "include/core/SkTypeface.h"
#include "include/effects/SkGradientShader.h"
#include "samplecode/Sample.h"
#include "src/utils/SkUTF.h"
#include "include/core/SkStream.h"
#include "src/core/SkOSFile.h"
static constexpr int INT_SIZE = 64;
static constexpr float SCALAR_SIZE = (float)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::MakeLinear(pts, colors, nullptr, 2, SkTileMode::kClamp));
canvas.drawCircle(SCALAR_SIZE/2, SCALAR_SIZE/2, SCALAR_SIZE/2, paint);
}
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 Sample {
SkPoint fSrcPt = {0, 0};
SkPoint fSrcVec = {0.866025f, 0.5f};
SkRect fSrcLimit = {-SCALAR_SIZE/4, -SCALAR_SIZE/4,
SCALAR_SIZE*5/4, SCALAR_SIZE*5/4};
SkRect fDstR[2] = {{10, 100, 260, 400}, {322.5, 100, 572.5, 400}};
SkBitmap fBitmap;
SkString name() override { return SkString("BitmapRect"); }
void onOnceBeforeDraw() override {
this->setBGColor(SK_ColorGRAY);
make_bitmap(&fBitmap);
}
void onDrawContent(SkCanvas* canvas) override {
SkRect srcR = {fSrcPt.fX - 16, fSrcPt.fY - 16,
fSrcPt.fX + 16, fSrcPt.fY + 16};
SkPaint paint(SkColors::kYellow);
paint.setStyle(SkPaint::kStroke_Style);
canvas->translate(20, 20);
canvas->drawBitmap(fBitmap, 0, 0, &paint);
canvas->drawRect(srcR, paint);
for (int i = 0; i < 2; ++i) {
paint.setFilterQuality(1 == i ? kLow_SkFilterQuality : kNone_SkFilterQuality);
canvas->drawBitmapRect(fBitmap, srcR, fDstR[i], &paint,
SkCanvas::kStrict_SrcRectConstraint);
canvas->drawRect(fDstR[i], paint);
}
}
bool onAnimate(double nanos) override {
bounce_pt(&fSrcPt, &fSrcVec, fSrcLimit);
return true;
}
};
static constexpr int BIG_H = 120;
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.";
SkFont font;
font.setSize(SkIntToScalar(BIG_H));
const int BIG_W = SkScalarRoundToInt(font.measureText(gText, strlen(gText), SkTextEncoding::kUTF8));
bm->allocN32Pixels(BIG_W, BIG_H);
bm->eraseColor(SK_ColorWHITE);
SkCanvas canvas(*bm);
canvas.drawSimpleText(gText, strlen(gText), SkTextEncoding::kUTF8, 0, font.getSize()*4/5, font, SkPaint());
}
class BitmapRectView2 : public Sample {
SkBitmap fBitmap;
SkRect fSrcR = {0, 0, 3 * BIG_H, BIG_H};
SkRect fLimitR;
SkScalar fDX = 1;
SkRect fDstR[2] = {{20, 20, 620, 220}, {20, 270, 620, 470}};
SkString name() override { return SkString("BigBitmapRect"); }
void onOnceBeforeDraw() override {
this->setBGColor(SK_ColorGRAY);
make_big_bitmap(&fBitmap);
fLimitR = SkRect::Make(fBitmap.dimensions());
}
void onDrawContent(SkCanvas* canvas) override {
SkPaint paint;
paint.setStyle(SkPaint::kStroke_Style);
paint.setColor(SK_ColorYELLOW);
for (int i = 0; i < 2; ++i) {
paint.setFilterQuality(1 == i ? kLow_SkFilterQuality : kNone_SkFilterQuality);
canvas->drawBitmapRect(fBitmap, fSrcR, fDstR[i], &paint,
SkCanvas::kStrict_SrcRectConstraint);
canvas->drawRect(fDstR[i], paint);
}
}
bool onAnimate(double nanos) override {
SkScalar width = fSrcR.width();
bounce(&fSrcR.fLeft, &fDX, fLimitR.fLeft, fLimitR.fRight - width);
fSrcR.fRight = fSrcR.fLeft + width;
return true;
}
};
DEF_SAMPLE( return new BitmapRectView(); )
DEF_SAMPLE( return new BitmapRectView2(); )
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