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#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 int dither_4444(int x) {
return ((x << 1) - ((x >> 4 << 4) | (x >> 4))) >> 4;
}
/** Ensure that the max of the original and dithered value (for alpha) is always
>= any other dithered value. We apply this "max" in colorpriv.h when we
predither down to 4444, to be sure that we stay in legal premultiplied form
*/
static void test_4444_dither() {
int buckets[16];
sk_bzero(buckets, sizeof(buckets));
for (int a = 0; a <= 0xFF; a++) {
int da = dither_4444(a);
int maxa = SkMax32(a >> 4, da);
// SkDebugf("--- %02X %X\n", a, da);
buckets[da] += 1;
for (int c = 0; c <= a; c++) {
int dc = dither_4444(c);
if (maxa < dc) {
SkDebugf("------------ error a=%d da=%d c=%d dc=%d\n", a, da,
c, dc);
}
}
}
for (int i = 0; i < 16; i++) {
// SkDebugf("[%d] = %d\n", i, buckets[i]);
}
}
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 TypefaceView : public SkView {
SkTypeface* fFaces[gFaceCount];
public:
TypefaceView() {
test_4444_dither();
for (int i = 0; i < gFaceCount; i++) {
fFaces[i] = SkTypeface::CreateFromName(gFaces[i].fName,
gFaces[i].fStyle);
}
}
virtual ~TypefaceView() {
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, "Typefaces");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawBG(SkCanvas* canvas) {
canvas->drawColor(0xFFDDDDDD);
}
virtual void onDraw(SkCanvas* canvas) {
this->drawBG(canvas);
SkPaint paint;
paint.setAntiAlias(true);
paint.setTextSize(SkIntToScalar(30));
if (false) {
paint.setStyle(SkPaint::kStroke_Style);
paint.setStrokeWidth(SkIntToScalar(1));
}
const char* text = "Hamburgefons";
const size_t textLen = strlen(text);
SkScalar x = SkIntToScalar(10);
SkScalar dy = paint.getFontMetrics(NULL);
SkScalar y = dy;
for (int i = 0; i < gFaceCount; i++) {
paint.setTypeface(fFaces[i]);
canvas->drawText(text, textLen, x, y, paint);
y += dy;
}
SkRect r;
if (false) {
r.set(10, 10, 100, 100);
paint.setStyle(SkPaint::kStrokeAndFill_Style);
paint.setColor(SK_ColorBLUE);
paint.setStrokeWidth(1);
canvas->drawRect(r, paint);
paint.setStrokeWidth(0);
}
if (false) {
r.set(294912.75f, 294912.75f, 884738.25f, 884738.25f);
canvas->scale(2.4414E-4f, 2.4414E-4f);
paint.setStyle(SkPaint::kFill_Style);
canvas->drawRect(r, paint);
}
if (false) {
SkScalar rad = 90;
SkScalar angle = 210;
SkScalar cx = 150;
SkScalar cy = 105;
r.set(cx - rad, cy - rad, cx + rad, cy + rad);
SkPath path;
path.arcTo(r, angle, -(angle + 90), true);
path.close();
paint.setColor(SK_ColorRED);
canvas->drawRect(path.getBounds(), paint);
paint.setColor(SK_ColorBLUE);
canvas->drawPath(path, paint);
paint.setColor(SK_ColorGREEN);
SkPoint pts[100];
int count = path.getPoints(pts, 100);
paint.setStrokeWidth(5);
canvas->drawPoints(SkCanvas::kPoints_PointMode, count, pts, paint);
}
}
private:
typedef SkView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new TypefaceView; }
static SkViewRegister reg(MyFactory);
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