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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 "SkBlurMask.h"
#include "SkBlurMaskFilter.h"
#include "SkCanvas.h"
#include "SkSurface.h"
static SkBitmap make_bitmap() {
SkBitmap bm;
bm.allocN32Pixels(5, 5);
for (int y = 0; y < bm.height(); y++) {
uint32_t* p = bm.getAddr32(0, y);
for (int x = 0; x < bm.width(); x++) {
p[x] = ((x + y) & 1) ? SK_ColorWHITE : SK_ColorBLACK;
}
}
bm.unlockPixels();
return bm;
}
class TextureDomainView : public SampleView {
SkBitmap fBM;
public:
TextureDomainView(){
fBM = make_bitmap();
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "Texture Domain");
return true;
}
return this->INHERITED::onQuery(evt);
}
virtual void onDrawContent(SkCanvas* canvas) {
SkRect srcRect;
SkRect dstRect;
SkPaint paint;
paint.setFilterLevel(SkPaint::kLow_FilterLevel);
// Test that bitmap draws from malloc-backed bitmaps respect
// the constrained texture domain.
srcRect.setXYWH(1, 1, 3, 3);
dstRect.setXYWH(5, 5, 305, 305);
canvas->drawBitmapRectToRect(fBM, &srcRect, dstRect, &paint);
// Test that bitmap draws across separate devices also respect
// the constrainted texture domain.
// Note: GPU-backed bitmaps follow a different rendering path
// when copying from one GPU device to another.
SkImageInfo info = SkImageInfo::MakeN32(5, 5, kOpaque_SkAlphaType);
SkAutoTUnref<SkSurface> surface(canvas->newSurface(info));
srcRect.setXYWH(1, 1, 3, 3);
dstRect.setXYWH(1, 1, 3, 3);
surface->getCanvas()->drawBitmapRectToRect(fBM, &srcRect, dstRect,
&paint);
SkAutoTUnref<SkImage> image(surface->newImageSnapshot());
srcRect.setXYWH(1, 1, 3, 3);
dstRect.setXYWH(405, 5, 305, 305);
image->draw(canvas, &srcRect, dstRect, &paint);
// Test that bitmap blurring using a subrect
// renders correctly
srcRect.setXYWH(1, 1, 3, 3);
dstRect.setXYWH(5, 405, 305, 305);
SkMaskFilter* mf = SkBlurMaskFilter::Create(
kNormal_SkBlurStyle,
SkBlurMask::ConvertRadiusToSigma(SkIntToScalar(5)),
SkBlurMaskFilter::kHighQuality_BlurFlag |
SkBlurMaskFilter::kIgnoreTransform_BlurFlag);
paint.setMaskFilter(mf)->unref();
image->draw(canvas, &srcRect, dstRect, &paint);
// Blur and a rotation + NULL src rect
// This should not trigger the texture domain code
// but it will test a code path in SkGpuDevice::drawBitmap
// that handles blurs with rects transformed to non-
// orthogonal rects. It also tests the NULL src rect handling
mf = SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
SkBlurMask::ConvertRadiusToSigma(5),
SkBlurMaskFilter::kHighQuality_BlurFlag);
paint.setMaskFilter(mf)->unref();
dstRect.setXYWH(-150, -150, 300, 300);
canvas->translate(550, 550);
canvas->rotate(45);
canvas->drawBitmapRectToRect(fBM, NULL, dstRect, &paint);
}
private:
typedef SkView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new TextureDomainView; }
static SkViewRegister reg(MyFactory);
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