blob: f5ddca9a7695a69d8aef86e8d5e367313112d6fe [file] [log] [blame]
#include "SampleCode.h"
#include "SkView.h"
#include "SkCanvas.h"
#include "SkGradientShader.h"
#include "SkGraphics.h"
#include "SkImageDecoder.h"
#include "SkPath.h"
#include "SkPorterDuff.h"
#include "SkRegion.h"
#include "SkShader.h"
#include "SkUtils.h"
#include "SkXfermode.h"
#include "SkComposeShader.h"
#include "SkColorPriv.h"
#include "SkColorFilter.h"
#include "SkTime.h"
#include "SkTransparentShader.h"
#include "SkTypeface.h"
static SkShader* make_bitmapfade(const SkBitmap& bm)
{
SkPoint pts[2];
SkColor colors[2];
pts[0].set(0, 0);
pts[1].set(0, SkIntToScalar(bm.height()));
colors[0] = SK_ColorBLACK;
colors[1] = SkColorSetARGB(0, 0, 0, 0);
SkShader* shaderA = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode);
SkShader* shaderB = SkShader::CreateBitmapShader(bm,
SkShader::kClamp_TileMode, SkShader::kClamp_TileMode);
SkXfermode* mode = SkPorterDuff::CreateXfermode(SkPorterDuff::kDstIn_Mode);
SkShader* shader = new SkComposeShader(shaderB, shaderA, mode);
shaderA->unref();
shaderB->unref();
mode->unref();
return shader;
}
class ShaderView : public SkView {
public:
SkShader* fShader;
SkBitmap fBitmap;
ShaderView()
{
SkImageDecoder::DecodeFile("/cover.png", &fBitmap);
SkPoint pts[2];
SkColor colors[2];
pts[0].set(0, 0);
pts[1].set(SkIntToScalar(100), 0);
colors[0] = SK_ColorRED;
colors[1] = SK_ColorBLUE;
SkShader* shaderA = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode);
pts[0].set(0, 0);
pts[1].set(0, SkIntToScalar(100));
colors[0] = SK_ColorBLACK;
colors[1] = SkColorSetARGB(0x80, 0, 0, 0);
SkShader* shaderB = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode);
SkXfermode* mode = SkPorterDuff::CreateXfermode(SkPorterDuff::kDstIn_Mode);
fShader = new SkComposeShader(shaderA, shaderB, mode);
shaderA->unref();
shaderB->unref();
mode->unref();
}
virtual ~ShaderView()
{
fShader->safeUnref();
}
protected:
// overrides from SkEventSink
virtual bool onQuery(SkEvent* evt)
{
if (SampleCode::TitleQ(*evt))
{
SampleCode::TitleR(evt, "Shaders");
return true;
}
return this->INHERITED::onQuery(evt);
}
void drawBG(SkCanvas* canvas)
{
// canvas->drawColor(0xFFDDDDDD);
canvas->drawColor(SK_ColorWHITE);
}
virtual void onDraw(SkCanvas* canvas)
{
this->drawBG(canvas);
canvas->drawBitmap(fBitmap, 0, 0);
{
SkIRect src;
SkRect dst;
src.set(20, 50, 120, 70);
dst.set(src);
dst.offset(SkIntToScalar(300), 0);
canvas->drawBitmapRect(fBitmap, &src, dst);
}
canvas->translate(SkIntToScalar(80), SkIntToScalar(80));
SkPaint paint;
SkRect r;
paint.setColor(SK_ColorGREEN);
canvas->drawRectCoords(0, 0, SkIntToScalar(100), SkIntToScalar(100), paint);
paint.setShader(fShader);
canvas->drawRectCoords(0, 0, SkIntToScalar(100), SkIntToScalar(100), paint);
canvas->translate(SkIntToScalar(110), 0);
r.set(0, 0, SkIntToScalar(fBitmap.width()), SkIntToScalar(fBitmap.height()));
paint.setShader(NULL);
canvas->drawRect(r, paint);
paint.setShader(make_bitmapfade(fBitmap))->unref();
canvas->drawRect(r, paint);
paint.setShader(new SkTransparentShader)->unref();
canvas->drawRect(r, paint);
}
virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y)
{
this->inval(NULL);
return this->INHERITED::onFindClickHandler(x, y);
}
virtual bool onClick(Click* click)
{
return this->INHERITED::onClick(click);
}
private:
typedef SkView INHERITED;
};
//////////////////////////////////////////////////////////////////////////////
static SkView* MyFactory() { return new ShaderView; }
static SkViewRegister reg(MyFactory);