f2b98d67dc
git-svn-id: http://skia.googlecode.com/svn/trunk@637 2bbb7eff-a529-9590-31e7-b0007b416f81
147 lines
4.0 KiB
C++
147 lines
4.0 KiB
C++
#include "SampleCode.h"
|
|
#include "SkView.h"
|
|
#include "SkCanvas.h"
|
|
#include "Sk64.h"
|
|
#include "SkCornerPathEffect.h"
|
|
#include "SkGradientShader.h"
|
|
#include "SkGraphics.h"
|
|
#include "SkImageDecoder.h"
|
|
#include "SkKernel33MaskFilter.h"
|
|
#include "SkPath.h"
|
|
#include "SkRandom.h"
|
|
#include "SkRegion.h"
|
|
#include "SkShader.h"
|
|
#include "SkUtils.h"
|
|
#include "SkColorPriv.h"
|
|
#include "SkColorFilter.h"
|
|
#include "SkTime.h"
|
|
#include "SkTypeface.h"
|
|
#include "SkXfermode.h"
|
|
|
|
#include "SkStream.h"
|
|
#include "SkXMLParser.h"
|
|
#include "SkColorPriv.h"
|
|
#include "SkImageDecoder.h"
|
|
|
|
class LinesView : public SkView {
|
|
public:
|
|
LinesView()
|
|
{
|
|
unsigned r = 0x1F;
|
|
unsigned g = 0x3F;
|
|
for (unsigned a = 0; a <= 0xF; a++) {
|
|
unsigned scale = 16 - SkAlpha15To16(a);
|
|
unsigned sr = (a << 1) | (a >> 3);
|
|
unsigned dr = r * scale >> 4;
|
|
unsigned sg = (a << 2) | (a >> 2);
|
|
unsigned dg = g * scale >> 4;
|
|
|
|
unsigned ssg = sg & ~(~(a >> 3) & 1);
|
|
|
|
printf("4444 sa=%d sr=%d sg=%d da=%d dr=%d dg=%d total-r=%d total-g=%d %d\n",
|
|
a, sr, sg, scale, dr, dg, sr+dr, sg+dg, ssg+dg);
|
|
}
|
|
|
|
for (unsigned aa = 0; aa <= 0xFF; aa++) {
|
|
unsigned invScale = SkAlpha255To256(255 - aa);
|
|
unsigned dst = SkAlphaMul(0xFF, invScale);
|
|
printf("8888 sa=%02x dst=%02x sum=%d %s\n", aa, dst, aa+dst,
|
|
(aa+dst) > 0xFF ? "OVERFLOW" : "");
|
|
}
|
|
}
|
|
|
|
protected:
|
|
// overrides from SkEventSink
|
|
virtual bool onQuery(SkEvent* evt)
|
|
{
|
|
if (SampleCode::TitleQ(*evt))
|
|
{
|
|
SampleCode::TitleR(evt, "Lines");
|
|
return true;
|
|
}
|
|
return this->INHERITED::onQuery(evt);
|
|
}
|
|
|
|
void drawBG(SkCanvas* canvas)
|
|
{
|
|
// canvas->drawColor(0xFFDDDDDD);
|
|
canvas->drawColor(SK_ColorWHITE);
|
|
// canvas->drawColor(SK_ColorBLACK);
|
|
}
|
|
|
|
/*
|
|
0x1F * x + 0x1F * (32 - x)
|
|
*/
|
|
void drawRings(SkCanvas* canvas)
|
|
{
|
|
canvas->scale(SkIntToScalar(1)/2, SkIntToScalar(1)/2);
|
|
|
|
SkRect r;
|
|
SkScalar x = SkIntToScalar(10);
|
|
SkScalar y = SkIntToScalar(10);
|
|
r.set(x, y, x + SkIntToScalar(100), y + SkIntToScalar(100));
|
|
|
|
SkPaint paint;
|
|
// paint.setAntiAlias(true);
|
|
paint.setStyle(SkPaint::kStroke_Style);
|
|
paint.setStrokeWidth(SkScalarHalf(SkIntToScalar(3)));
|
|
paint.setColor(0xFFFF8800);
|
|
// paint.setColor(0xFFFFFFFF);
|
|
canvas->drawRect(r, paint);
|
|
}
|
|
|
|
virtual void onDraw(SkCanvas* canvas)
|
|
{
|
|
this->drawBG(canvas);
|
|
|
|
SkBitmap bm;
|
|
SkImageDecoder::DecodeFile("/kill.gif", &bm);
|
|
canvas->drawBitmap(bm, 0, 0, NULL);
|
|
|
|
this->drawRings(canvas);
|
|
return;
|
|
|
|
SkPaint paint;
|
|
|
|
// fAlpha = 0x80;
|
|
paint.setColor(SK_ColorWHITE);
|
|
paint.setAlpha(fAlpha & 0xFF);
|
|
SkRect r;
|
|
|
|
SkScalar x = SkIntToScalar(10);
|
|
SkScalar y = SkIntToScalar(10);
|
|
r.set(x, y, x + SkIntToScalar(100), y + SkIntToScalar(100));
|
|
canvas->drawRect(r, paint);
|
|
return;
|
|
|
|
paint.setColor(0xffffff00); // yellow
|
|
paint.setStyle(SkPaint::kStroke_Style);
|
|
paint.setStrokeWidth(SkIntToScalar(2));
|
|
|
|
// y += SK_Scalar1/2;
|
|
|
|
canvas->drawLine(x, y, x + SkIntToScalar(90), y + SkIntToScalar(90), paint);
|
|
|
|
paint.setAntiAlias(true); // with anti-aliasing
|
|
y += SkIntToScalar(10);
|
|
canvas->drawLine(x, y, x + SkIntToScalar(90), y + SkIntToScalar(90), paint);
|
|
}
|
|
|
|
virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y)
|
|
{
|
|
fAlpha = SkScalarRound(y);
|
|
this->inval(NULL);
|
|
return NULL;
|
|
}
|
|
private:
|
|
|
|
int fAlpha;
|
|
typedef SkView INHERITED;
|
|
};
|
|
|
|
//////////////////////////////////////////////////////////////////////////////
|
|
|
|
static SkView* MyFactory() { return new LinesView; }
|
|
static SkViewRegister reg(MyFactory);
|
|
|