skia2/samplecode/SampleFontScalerTest.cpp
reed@google.com 82065d667f remove SkRefCnt safeRef() and safeUnref(), and replace the call-sites with
SkSafeRef() and SkSafeUnref().

This is basically a bug waiting to happen. An optimizing compiler can remove
checks for null on "this" if it chooses. However, SkRefCnt::safeRef() relies on
precisely this check...

void SkRefCnt::safeRef() {
    if (this) {
        this->ref();
    }
}

Since a compiler might skip the if-clause, it breaks the intention of this
method, hence its removal.

static inline void SkSafeRef(SkRefCnt* obj) {
    if (obj) {
        obj->ref();
    }
}

This form is not ignored by an optimizing compile, so we use it instead.




git-svn-id: http://skia.googlecode.com/svn/trunk@762 2bbb7eff-a529-9590-31e7-b0007b416f81
2011-02-07 15:30:46 +00:00

122 lines
3.2 KiB
C++

#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkTypeface.h"
#include "SkPath.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "Sk1DPathEffect.h"
#include "SkCornerPathEffect.h"
#include "SkPathMeasure.h"
#include "SkRandom.h"
#include "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkDither.h"
static const struct {
const char* fName;
SkTypeface::Style fStyle;
} gFaces[] = {
{ NULL, SkTypeface::kNormal },
{ NULL, SkTypeface::kBold },
{ "serif", SkTypeface::kNormal },
{ "serif", SkTypeface::kBold },
{ "serif", SkTypeface::kItalic },
{ "serif", SkTypeface::kBoldItalic },
{ "monospace", SkTypeface::kNormal }
};
static const int gFaceCount = SK_ARRAY_COUNT(gFaces);
class FontScalerTestView : public SkView {
SkTypeface* fFaces[gFaceCount];
public:
FontScalerTestView() {
for (int i = 0; i < gFaceCount; i++) {
fFaces[i] = SkTypeface::CreateFromName(gFaces[i].fName,
gFaces[i].fStyle);
}
}
virtual ~FontScalerTestView() {
for (int i = 0; i < gFaceCount; i++) {
SkSafeUnref(fFaces[i]);
}
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt) {
if (SampleCode::TitleQ(*evt)) {
SampleCode::TitleR(evt, "FontScaler Test");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawBG(SkCanvas* canvas) {
canvas->drawColor(0xFFDDDDDD);
}
virtual void onDraw(SkCanvas* canvas) {
this->drawBG(canvas);
SkPaint paint;
// test handling of obscene cubic values (currently broken)
if (false) {
SkPoint pts[4];
pts[0].set(1.61061274e+09, 6291456);
pts[1].set(-7.18397061e+15, -1.53091184e+13);
pts[2].set(-1.30077315e+16, -2.77196141e+13);
pts[3].set(-1.30077315e+16, -2.77196162e+13);
SkPath path;
path.moveTo(pts[0]);
path.cubicTo(pts[1], pts[2], pts[3]);
canvas->drawPath(path, paint);
}
canvas->translate(200, 20);
canvas->rotate(30);
paint.setAntiAlias(true);
SkSafeUnref(paint.setTypeface(SkTypeface::CreateFromName("Times Roman", SkTypeface::kNormal)));
// const char* text = "abcdefghijklmnopqrstuvwxyz";
const char* text = "HnHnHnHnHnHnHnHnH";
size_t textLen = strlen(text);
SkScalar x = SkIntToScalar(10);
SkScalar y = SkIntToScalar(20);
{
SkPaint p;
p.setColor(SK_ColorRED);
SkRect r;
r.set(0, 0, x, y*20);
canvas->drawRect(r, p);
}
int index = 0;
for (int ps = 9; ps <= 24; ps++) {
textLen = strlen(text);
paint.setTextSize(SkIntToScalar(ps));
canvas->drawText(text, textLen, x, y, paint);
y += paint.getFontMetrics(NULL);
index += 1;
}
}
private:
typedef SkView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new FontScalerTestView; }
static SkViewRegister reg(MyFactory);