grab from latest android

git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 164 insertions, 0 deletions

diff --git a/samplecode/SampleFilter.cpp b/samplecode/SampleFilter.cpp
new file mode 100644
index 0000000000..8d26470a70
--- /dev/null
+++ b/samplecode/SampleFilter.cpp
@@ -0,0 +1,164 @@
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkGradientShader.h"
+#include "SkPath.h"
+#include "SkRegion.h"
+#include "SkShader.h"
+#include "SkUtils.h"
+#include "SkShaderExtras.h"
+#include "Sk1DPathEffect.h"
+#include "SkCornerPathEffect.h"
+#include "SkPathMeasure.h"
+#include "SkRandom.h"
+#include "SkColorPriv.h"
+#include "SkColorFilter.h"
+#include "SkDither.h"
+
+static void make_bm(SkBitmap* bm)
+{
+    const SkColor colors[] = {
+        SK_ColorRED, SK_ColorGREEN,
+        SK_ColorBLUE, SK_ColorWHITE
+    };
+    SkColorTable* ctable = new SkColorTable(colors, 4);
+    bm->setConfig(SkBitmap::kIndex8_Config, 2, 2);
+    bm->allocPixels(ctable);
+    ctable->unref();
+    
+    *bm->getAddr8(0, 0) = 0;
+    *bm->getAddr8(1, 0) = 1;
+    *bm->getAddr8(0, 1) = 2;
+    *bm->getAddr8(1, 1) = 3;
+}
+
+static SkScalar draw_bm(SkCanvas* canvas, const SkBitmap& bm,
+                        SkScalar x, SkScalar y, SkPaint* paint)
+{
+#if 1
+    canvas->drawBitmap(bm, x, y, paint);
+    return SkIntToScalar(bm.width()) * 5/4;
+#else
+    SkRect r;
+    
+    r.set(x, y,
+          x + SkIntToScalar(bm.width() * 2),
+          y + SkIntToScalar(bm.height() * 2));
+    SkShader* s = SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode,
+                                               SkShader::kRepeat_TileMode);
+    paint->setShader(s)->unref();
+    canvas->drawRect(r, *paint);
+    paint->setShader(NULL);
+    return r.width() * 5/4;
+#endif
+}
+
+static SkScalar draw_set(SkCanvas* c, const SkBitmap& bm, SkScalar x, SkPaint* p)
+{
+    x += draw_bm(c, bm, x, 0, p);
+    p->setFilterBitmap(true);
+    x += draw_bm(c, bm, x, 0, p);
+    p->setDither(true);
+    return x + draw_bm(c, bm, x, 0, p);
+}
+
+static const char* gConfigNames[] = {
+    "unknown config",
+    "A1",
+    "A8",
+    "Index8",
+    "565",
+    "4444",
+    "8888"
+};
+
+static SkScalar draw_row(SkCanvas* canvas, const SkBitmap& bm)
+{
+    SkAutoCanvasRestore acr(canvas, true);
+
+    SkPaint paint;
+    SkScalar x = 0;
+    const int scale = 32;
+
+    paint.setAntiAlias(true);
+    const char* name = gConfigNames[bm.config()];
+    canvas->drawText(name, strlen(name), x, SkIntToScalar(bm.height())*scale*5/8,
+                     paint);
+    canvas->translate(SkIntToScalar(48), 0);
+
+    canvas->scale(SkIntToScalar(scale), SkIntToScalar(scale));
+    
+    x += draw_set(canvas, bm, 0, &paint);
+    paint.reset();
+    paint.setAlpha(0x80);
+    draw_set(canvas, bm, x, &paint);
+    return x * scale / 3;
+}
+
+class FilterView : public SkView {
+public:
+    SkBitmap    fBM8, fBM4444, fBM16, fBM32;
+
+	FilterView()
+    {
+        make_bm(&fBM8);
+        fBM8.copyTo(&fBM4444, SkBitmap::kARGB_4444_Config);
+        fBM8.copyTo(&fBM16, SkBitmap::kRGB_565_Config);
+        fBM8.copyTo(&fBM32, SkBitmap::kARGB_8888_Config);
+    }
+
+protected:
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt)
+    {
+        if (SampleCode::TitleQ(*evt))
+        {
+            SampleCode::TitleR(evt, "Filter");
+            return true;
+        }
+        return this->INHERITED::onQuery(evt);
+    }
+    
+    void drawBG(SkCanvas* canvas)
+    {
+        canvas->drawColor(0xFFDDDDDD);
+    }
+    
+    virtual void onDraw(SkCanvas* canvas)
+    {
+        this->drawBG(canvas);
+
+        SkScalar x = SkIntToScalar(10);
+        SkScalar y = SkIntToScalar(10);
+        
+        canvas->translate(x, y);
+        y = draw_row(canvas, fBM8);
+        canvas->translate(0, y);
+        y = draw_row(canvas, fBM4444);
+        canvas->translate(0, y);
+        y = draw_row(canvas, fBM16);
+        canvas->translate(0, y);
+        draw_row(canvas, fBM32);
+    }
+    
+    virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) 
+    {
+     //   fSweep += SK_Scalar1;
+        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 FilterView; }
+static SkViewRegister reg(MyFactory);
+