blob: a3649e5c9251511605632b1974aa69e084e78223 [file] [log] [blame]
/*
* Copyright 2014 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "samplecode/Sample.h"
#include "include/core/SkCanvas.h"
#include "include/core/SkColorPriv.h"
#include "include/core/SkFont.h"
#include "include/core/SkStream.h"
#include "include/utils/SkRandom.h"
#include "samplecode/DecodeFile.h"
#include "tools/Resources.h"
// Intended to exercise pixel snapping observed with scaled images (and
// with non-scaled images, but for a different reason): Bug 1145
class SubpixelTranslateView : public Sample {
public:
SubpixelTranslateView(const char imageFilename[],
float horizontalVelocity,
float verticalVelocity)
: fHorizontalVelocity(horizontalVelocity)
, fVerticalVelocity(verticalVelocity)
{
if (!DecodeDataToBitmap(GetResourceAsData(imageFilename), &fBM)) {
fBM.allocN32Pixels(1, 1);
*(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
}
fCurPos = SkPoint::Make(0,0);
fSize = 200;
}
protected:
SkBitmap fBM;
SkScalar fSize;
float fHorizontalVelocity, fVerticalVelocity;
SkPoint fCurPos;
SkString name() override { return SkString("SubpixelTranslate"); }
void onDrawContent(SkCanvas* canvas) override {
static const SkFilterQuality gQualitys[] = {
kNone_SkFilterQuality,
kLow_SkFilterQuality,
kMedium_SkFilterQuality,
kHigh_SkFilterQuality
};
SkPaint paint;
SkFont font(nullptr, 48);
font.setSubpixel(true);
paint.setAntiAlias(true);
for (size_t i = 0; i < SK_ARRAY_COUNT(gQualitys); ++i) {
paint.setFilterQuality(gQualitys[i]);
SkRect r = SkRect::MakeXYWH( fCurPos.fX + i * (fSize + 10), fCurPos.fY, fSize, fSize );
canvas->drawBitmapRect( fBM, r, &paint );
}
canvas->drawString("AA Scaled", fCurPos.fX + SK_ARRAY_COUNT(gQualitys) * (fSize + 10),
fCurPos.fY + fSize/2, font, paint);
paint.setAntiAlias(false);
font.setEdging(SkFont::Edging::kAlias);
for (size_t i = 0; i < SK_ARRAY_COUNT(gQualitys); ++i) {
paint.setFilterQuality(gQualitys[i]);
SkRect r = SkRect::MakeXYWH( fCurPos.fX + i * (fSize + 10), fCurPos.fY + fSize + 10, fSize, fSize );
canvas->drawBitmapRect( fBM, r, &paint );
}
canvas->drawString("Scaled", fCurPos.fX + SK_ARRAY_COUNT(gQualitys) * (fSize + 10),
fCurPos.fY + fSize + 10 + fSize/2, font, paint);
paint.setAntiAlias(true);
font.setEdging(SkFont::Edging::kAntiAlias);
for (size_t i = 0; i < SK_ARRAY_COUNT(gQualitys); ++i) {
paint.setFilterQuality(gQualitys[i]);
canvas->drawBitmap( fBM, fCurPos.fX + i * (fBM.width() + 10), fCurPos.fY + 2*(fSize + 10), &paint );
}
canvas->drawString("AA No Scale",
fCurPos.fX + SK_ARRAY_COUNT(gQualitys) * (fBM.width() + 10),
fCurPos.fY + 2*(fSize + 10) + fSize/2, font, paint);
paint.setAntiAlias(false);
font.setEdging(SkFont::Edging::kAlias);
for (size_t i = 0; i < SK_ARRAY_COUNT(gQualitys); ++i) {
paint.setFilterQuality(gQualitys[i]);
canvas->drawBitmap( fBM, fCurPos.fX + i * (fBM.width() + 10), fCurPos.fY + 2*(fSize + 10) + fBM.height() + 10, &paint );
}
canvas->drawString("No Scale", fCurPos.fX + SK_ARRAY_COUNT(gQualitys) * (fBM.width() + 10),
fCurPos.fY + 2*(fSize + 10) + fBM.height() + 10 + fSize/2, font, paint);
fCurPos.fX += fHorizontalVelocity;
fCurPos.fY += fVerticalVelocity;
}
private:
using INHERITED = Sample;
};
//////////////////////////////////////////////////////////////////////////////
DEF_SAMPLE( return new SubpixelTranslateView("images/mandrill_256.png", .05f, .05f); )