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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 "gm.h"
#include "SkShader.h"
#include "SkColorPriv.h"
// effects
#include "SkGradientShader.h"
namespace skiagm {
static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) {
bm->setConfig(config, w, h);
bm->allocPixels();
bm->eraseColor(0);
SkCanvas canvas(*bm);
SkScalar wScalar = SkIntToScalar(w);
SkScalar hScalar = SkIntToScalar(h);
SkPoint pt = { wScalar / 2, hScalar / 2 };
SkScalar radius = 4 * SkMaxScalar(wScalar, hScalar);
SkColor colors[] = { SK_ColorRED, SK_ColorYELLOW,
SK_ColorGREEN, SK_ColorMAGENTA,
SK_ColorBLUE, SK_ColorCYAN,
SK_ColorRED};
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;
paint.setShader(SkGradientShader::CreateRadial(
pt, radius,
colors, pos,
SK_ARRAY_COUNT(colors),
SkShader::kRepeat_TileMode))->unref();
SkRect rect = SkRect::MakeWH(wScalar, hScalar);
SkMatrix mat = SkMatrix::I();
for (int i = 0; i < 4; ++i) {
paint.getShader()->setLocalMatrix(mat);
canvas.drawRect(rect, paint);
rect.inset(wScalar / 8, hScalar / 8);
mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4);
}
}
static const int gSize = 1024;
class DrawBitmapRectGM : public GM {
public:
DrawBitmapRectGM() {
}
SkBitmap fLargeBitmap;
protected:
SkString onShortName() {
return SkString("drawbitmaprect");
}
SkISize onISize() { return make_isize(gSize, gSize); }
virtual void onDraw(SkCanvas* canvas) {
static const int kBmpSize = 2048;
if (fLargeBitmap.isNull()) {
makebm(&fLargeBitmap,
SkBitmap::kARGB_8888_Config,
kBmpSize, kBmpSize);
}
SkRect dstRect = { 0, 0, 64, 64};
static const int kMaxSrcRectSize = 1 << (SkNextLog2(kBmpSize) + 2);
static const int kPadX = 30;
static const int kPadY = 40;
SkPaint paint;
paint.setAlpha(0x20);
canvas->drawBitmapRect(fLargeBitmap, NULL,
SkRect::MakeWH(gSize * SK_Scalar1,
gSize * SK_Scalar1),
&paint);
canvas->translate(SK_Scalar1 * kPadX / 2,
SK_Scalar1 * kPadY / 2);
SkPaint blackPaint;
SkScalar titleHeight = SK_Scalar1 * 24;
blackPaint.setColor(SK_ColorBLACK);
blackPaint.setTextSize(titleHeight);
blackPaint.setAntiAlias(true);
SkString title;
title.printf("Bitmap size: %d x %d", kBmpSize, kBmpSize);
canvas->drawText(title.c_str(), title.size(), 0,
titleHeight, blackPaint);
canvas->translate(0, SK_Scalar1 * kPadY / 2 + titleHeight);
int rowCount = 0;
canvas->save();
for (int w = 1; w <= kMaxSrcRectSize; w *= 4) {
for (int h = 1; h <= kMaxSrcRectSize; h *= 4) {
SkIRect srcRect = SkIRect::MakeXYWH((kBmpSize - w) / 2,
(kBmpSize - h) / 2,
w, h);
canvas->drawBitmapRect(fLargeBitmap, &srcRect, dstRect);
SkString label;
label.appendf("%d x %d", w, h);
blackPaint.setAntiAlias(true);
blackPaint.setStyle(SkPaint::kFill_Style);
blackPaint.setTextSize(SK_Scalar1 * 10);
SkScalar baseline = dstRect.height() +
blackPaint.getTextSize() + SK_Scalar1 * 3;
canvas->drawText(label.c_str(), label.size(),
0, baseline,
blackPaint);
blackPaint.setStyle(SkPaint::kStroke_Style);
blackPaint.setStrokeWidth(SK_Scalar1);
blackPaint.setAntiAlias(false);
canvas->drawRect(dstRect, blackPaint);
canvas->translate(dstRect.width() + SK_Scalar1 * kPadX, 0);
++rowCount;
if ((dstRect.width() + kPadX) * rowCount > gSize) {
canvas->restore();
canvas->translate(0, dstRect.height() + SK_Scalar1 * kPadY);
canvas->save();
rowCount = 0;
}
}
}
}
private:
typedef GM INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static GM* MyFactory(void*) { return new DrawBitmapRectGM; }
static GMRegistry reg(MyFactory);
}
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