Code drop from //branches/cupcake/...@124589

1 files changed, 791 insertions, 0 deletions

diff --git a/Samples/SampleAll.cpp b/Samples/SampleAll.cpp
new file mode 100644
index 0000000..968263b
--- /dev/null
+++ b/Samples/SampleAll.cpp
@@ -0,0 +1,791 @@
+#include "SampleCode.h"
+#include "SkCanvas.h"
+#include "SkView.h"
+#include "Sk1DPathEffect.h"
+#include "Sk2DPathEffect.h"
+#include "SkAvoidXfermode.h"
+#include "SkBlurMaskFilter.h"
+#include "SkColorFilter.h"
+#include "SkColorPriv.h"
+#include "SkCornerPathEffect.h"
+#include "SkDashPathEffect.h"
+#include "SkDiscretePathEffect.h"
+#include "SkEmbossMaskFilter.h"
+#include "SkGradientShader.h"
+#include "SkImageDecoder.h"
+#include "SkLayerRasterizer.h"
+#include "SkMath.h"
+#include "SkPath.h"
+#include "SkRegion.h"
+#include "SkShader.h"
+#include "SkShaderExtras.h"
+#include "SkCornerPathEffect.h"
+#include "SkPathMeasure.h"
+#include "SkPicture.h"
+#include "SkRandom.h"
+#include "SkTransparentShader.h"
+#include "SkTypeface.h"
+#include "SkUnitMappers.h"
+#include "SkUtils.h"
+#include "SkXfermode.h"
+
+#include <math.h>
+
+extern void Dump();
+    
+static inline SkPMColor rgb2gray(SkPMColor c)
+{
+    unsigned r = SkGetPackedR32(c);
+    unsigned g = SkGetPackedG32(c);
+    unsigned b = SkGetPackedB32(c);
+    
+    unsigned x = r * 5 + g * 7 + b * 4 >> 4;
+    
+    return SkPackARGB32(0, x, x, x) | (c & (SK_A32_MASK << SK_A32_SHIFT));
+}
+
+class SkGrayScaleColorFilter : public SkColorFilter {
+public:
+    virtual void filterSpan(const SkPMColor src[], int count, SkPMColor result[])
+    {
+        for (int i = 0; i < count; i++)
+            result[i] = rgb2gray(src[i]);
+    }
+};
+
+class SkChannelMaskColorFilter : public SkColorFilter {
+public:
+    SkChannelMaskColorFilter(U8CPU redMask, U8CPU greenMask, U8CPU blueMask)
+    {
+        fMask = SkPackARGB32(0xFF, redMask, greenMask, blueMask);
+    }
+
+    virtual void filterSpan(const SkPMColor src[], int count, SkPMColor result[])
+    {
+        SkPMColor mask = fMask;
+        for (int i = 0; i < count; i++)
+            result[i] = src[i] & mask;
+    }
+    
+private:
+    SkPMColor   fMask;
+};
+
+///////////////////////////////////////////////////////////
+
+static void r0(SkLayerRasterizer* rast, SkPaint& p)
+{
+    p.setMaskFilter(SkBlurMaskFilter::Create(SkIntToScalar(3),
+                                             SkBlurMaskFilter::kNormal_BlurStyle))->unref();
+    rast->addLayer(p, SkIntToScalar(3), SkIntToScalar(3));
+
+    p.setMaskFilter(NULL);
+    p.setStyle(SkPaint::kStroke_Style);
+    p.setStrokeWidth(SK_Scalar1);
+    rast->addLayer(p);
+
+    p.setAlpha(0x11);
+    p.setStyle(SkPaint::kFill_Style);
+    p.setPorterDuffXfermode(SkPorterDuff::kSrc_Mode);
+    rast->addLayer(p);
+}
+
+static void r1(SkLayerRasterizer* rast, SkPaint& p)
+{
+    rast->addLayer(p);
+
+    p.setAlpha(0x40);
+    p.setPorterDuffXfermode(SkPorterDuff::kSrc_Mode);
+    p.setStyle(SkPaint::kStroke_Style);
+    p.setStrokeWidth(SK_Scalar1*2);
+    rast->addLayer(p);
+}
+    
+static void r2(SkLayerRasterizer* rast, SkPaint& p)
+{
+    p.setStyle(SkPaint::kStrokeAndFill_Style);
+    p.setStrokeWidth(SK_Scalar1*4);
+    rast->addLayer(p);
+
+    p.setStyle(SkPaint::kStroke_Style);
+    p.setStrokeWidth(SK_Scalar1*3/2);
+    p.setPorterDuffXfermode(SkPorterDuff::kClear_Mode);
+    rast->addLayer(p);
+}
+
+static void r3(SkLayerRasterizer* rast, SkPaint& p)
+{
+    p.setStyle(SkPaint::kStroke_Style);
+    p.setStrokeWidth(SK_Scalar1*3);
+    rast->addLayer(p);
+
+    p.setAlpha(0x20);
+    p.setStyle(SkPaint::kFill_Style);
+    p.setPorterDuffXfermode(SkPorterDuff::kSrc_Mode);
+    rast->addLayer(p);
+}
+
+static void r4(SkLayerRasterizer* rast, SkPaint& p)
+{
+    p.setAlpha(0x60);
+    rast->addLayer(p, SkIntToScalar(3), SkIntToScalar(3));
+
+    p.setAlpha(0xFF);
+    p.setPorterDuffXfermode(SkPorterDuff::kClear_Mode);
+    rast->addLayer(p, SK_Scalar1*3/2, SK_Scalar1*3/2);
+
+    p.setXfermode(NULL);
+    rast->addLayer(p);
+}
+
+static void r5(SkLayerRasterizer* rast, SkPaint& p)
+{
+    rast->addLayer(p);
+
+    p.setPathEffect(new SkDiscretePathEffect(SK_Scalar1*4, SK_Scalar1*3))->unref();
+    p.setPorterDuffXfermode(SkPorterDuff::kSrcOut_Mode);
+    rast->addLayer(p);
+}
+
+static void r6(SkLayerRasterizer* rast, SkPaint& p)
+{
+    rast->addLayer(p);
+    
+    p.setAntiAlias(false);
+    SkLayerRasterizer* rast2 = new SkLayerRasterizer;
+    r5(rast2, p);
+    p.setRasterizer(rast2)->unref();
+    p.setPorterDuffXfermode(SkPorterDuff::kClear_Mode);
+    rast->addLayer(p);
+}
+
+class Dot2DPathEffect : public Sk2DPathEffect {
+public:
+    Dot2DPathEffect(SkScalar radius, const SkMatrix& matrix)
+        : Sk2DPathEffect(matrix), fRadius(radius) {}
+
+    virtual void flatten(SkFlattenableWriteBuffer& buffer)
+    {
+        this->INHERITED::flatten(buffer);
+        
+        buffer.writeScalar(fRadius);
+    }
+    virtual Factory getFactory() { return CreateProc; }
+
+protected:
+	virtual void next(const SkPoint& loc, int u, int v, SkPath* dst)
+    {
+        dst->addCircle(loc.fX, loc.fY, fRadius);
+    }
+    
+    Dot2DPathEffect(SkFlattenableReadBuffer& buffer) : Sk2DPathEffect(buffer)
+    {
+        fRadius = buffer.readScalar();
+    }
+private:
+    SkScalar fRadius;
+
+    static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer)
+    {
+        return new Dot2DPathEffect(buffer);
+    }
+
+    typedef Sk2DPathEffect INHERITED;
+};
+
+static void r7(SkLayerRasterizer* rast, SkPaint& p)
+{
+    SkMatrix    lattice;
+    lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0);
+    lattice.postSkew(SK_Scalar1/3, 0, 0, 0);
+    p.setPathEffect(new Dot2DPathEffect(SK_Scalar1*4, lattice))->unref();
+    rast->addLayer(p);
+}
+
+static void r8(SkLayerRasterizer* rast, SkPaint& p)
+{
+    rast->addLayer(p);
+    
+    SkMatrix    lattice;
+    lattice.setScale(SK_Scalar1*6, SK_Scalar1*6, 0, 0);
+    lattice.postSkew(SK_Scalar1/3, 0, 0, 0);
+    p.setPathEffect(new Dot2DPathEffect(SK_Scalar1*2, lattice))->unref();
+    p.setPorterDuffXfermode(SkPorterDuff::kClear_Mode);
+    rast->addLayer(p);
+
+    p.setPathEffect(NULL);
+    p.setXfermode(NULL);
+    p.setStyle(SkPaint::kStroke_Style);
+    p.setStrokeWidth(SK_Scalar1);
+    rast->addLayer(p);
+}
+
+class Line2DPathEffect : public Sk2DPathEffect {
+public:
+    Line2DPathEffect(SkScalar width, const SkMatrix& matrix)
+        : Sk2DPathEffect(matrix), fWidth(width) {}
+
+	virtual bool filterPath(SkPath* dst, const SkPath& src, SkScalar* width)
+    {
+        if (this->INHERITED::filterPath(dst, src, width))
+        {
+            *width = fWidth;
+            return true;
+        }
+        return false;
+    }
+    
+    virtual Factory getFactory() { return CreateProc; }
+    virtual void flatten(SkFlattenableWriteBuffer& buffer)
+    {
+        this->INHERITED::flatten(buffer);
+        buffer.writeScalar(fWidth);
+    }
+protected:
+	virtual void nextSpan(int u, int v, int ucount, SkPath* dst)
+    {
+        if (ucount > 1)
+        {
+            SkPoint	src[2], dstP[2];
+
+            src[0].set(SkIntToScalar(u) + SK_ScalarHalf,
+                       SkIntToScalar(v) + SK_ScalarHalf);
+            src[1].set(SkIntToScalar(u+ucount) + SK_ScalarHalf,
+                       SkIntToScalar(v) + SK_ScalarHalf);
+            this->getMatrix().mapPoints(dstP, src, 2);
+            
+            dst->moveTo(dstP[0]);
+            dst->lineTo(dstP[1]);
+        }
+    }
+    
+    Line2DPathEffect::Line2DPathEffect(SkFlattenableReadBuffer& buffer) : Sk2DPathEffect(buffer)
+    {
+        fWidth = buffer.readScalar();
+    }
+    
+private:
+    SkScalar fWidth;
+
+    static SkFlattenable* CreateProc(SkFlattenableReadBuffer& buffer) { return new Line2DPathEffect(buffer); }
+
+    typedef Sk2DPathEffect INHERITED;
+};
+
+static void r9(SkLayerRasterizer* rast, SkPaint& p)
+{
+    rast->addLayer(p);
+    
+    SkMatrix    lattice;
+    lattice.setScale(SK_Scalar1, SK_Scalar1*6, 0, 0);
+    lattice.postRotate(SkIntToScalar(30), 0, 0);
+    p.setPathEffect(new Line2DPathEffect(SK_Scalar1*2, lattice))->unref();
+    p.setPorterDuffXfermode(SkPorterDuff::kClear_Mode);
+    rast->addLayer(p);
+
+    p.setPathEffect(NULL);
+    p.setXfermode(NULL);
+    p.setStyle(SkPaint::kStroke_Style);
+    p.setStrokeWidth(SK_Scalar1);
+    rast->addLayer(p);
+}
+
+typedef void (*raster_proc)(SkLayerRasterizer*, SkPaint&);
+
+static const raster_proc gRastProcs[] = {
+    r0, r1, r2, r3, r4, r5, r6, r7, r8, r9
+};
+
+static const struct {
+    SkColor fMul, fAdd;
+} gLightingColors[] = {
+    { 0x808080, 0x800000 }, // general case
+    { 0x707070, 0x707070 }, // no-pin case
+    { 0xFFFFFF, 0x800000 }, // just-add case
+    { 0x808080, 0x000000 }, // just-mul case
+    { 0xFFFFFF, 0x000000 }  // identity case
+};
+
+static unsigned color_dist16(uint16_t a, uint16_t b)
+{
+    unsigned dr = SkAbs32(SkPacked16ToR32(a) - SkPacked16ToR32(b));
+    unsigned dg = SkAbs32(SkPacked16ToG32(a) - SkPacked16ToG32(b));
+    unsigned db = SkAbs32(SkPacked16ToB32(a) - SkPacked16ToB32(b));
+    
+    return SkMax32(dr, SkMax32(dg, db));
+}
+
+static unsigned scale_dist(unsigned dist, unsigned scale)
+{
+    dist >>= 6;
+    dist = (dist << 2) | dist;
+    dist = (dist << 4) | dist;
+    return dist;
+
+//    return SkAlphaMul(dist, scale);
+}
+
+static void apply_shader(SkPaint* paint, int index)
+{    
+    raster_proc proc = gRastProcs[index];
+    if (proc)
+    {
+        SkPaint p;
+        SkLayerRasterizer*  rast = new SkLayerRasterizer;
+
+        p.setAntiAlias(true);
+        proc(rast, p);
+        paint->setRasterizer(rast)->unref();
+    }
+
+#if 1
+    SkScalar dir[] = { SK_Scalar1, SK_Scalar1, SK_Scalar1 };
+    paint->setMaskFilter(SkBlurMaskFilter::CreateEmboss(dir, SK_Scalar1/4, SkIntToScalar(4), SkIntToScalar(3)))->unref();    
+    paint->setColor(SK_ColorBLUE);
+#endif
+}
+
+static void test_math()
+{
+    float x;
+    const float PI = 3.141593;
+    
+    for (x = 0; x < 1; x += 0.05f)
+        printf("atan(%g) = %g\n", x, atanf(x) * 180/PI);
+    for (x = 1; x < 10000000; x *= 2)
+        printf("atan(%g) = %g\n", x, atanf(x) * 180/PI);
+}
+
+class DemoView : public SkView {
+public:
+    DemoView()
+    {
+        test_math();
+    }
+	
+protected:
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt)
+    {
+        if (SampleCode::TitleQ(*evt))
+        {
+            SampleCode::TitleR(evt, "Demo");
+            return true;
+        }
+        return this->INHERITED::onQuery(evt);
+    }
+    
+    virtual bool onClick(Click* click) 
+    {
+        return this->INHERITED::onClick(click);
+    }
+    
+    void makePath(SkPath& path)
+    {
+        path.addCircle(SkIntToScalar(20), SkIntToScalar(20), SkIntToScalar(20),
+            SkPath::kCCW_Direction);
+        for (int index = 0; index < 10; index++) {
+            SkScalar x = SkFloatToScalar(cos(index / 10.0f * 2 * 3.1415925358f));
+            SkScalar y = SkFloatToScalar(sin(index / 10.0f * 2 * 3.1415925358f));
+            x *= index & 1 ? 7 : 14;
+            y *= index & 1 ? 7 : 14;
+            x += SkIntToScalar(20);
+            y += SkIntToScalar(20);
+            if (index == 0)
+                path.moveTo(x, y);
+            else
+                path.lineTo(x, y);
+        }
+        path.close();
+    }
+    
+    virtual void onDraw(SkCanvas* canvas)
+    {
+        canvas->drawColor(SK_ColorWHITE);
+        canvas->save();
+        drawPicture(canvas, 0);
+        canvas->restore();
+
+        {
+            SkPicture picture;
+            SkCanvas* record = picture.beginRecording(320, 480);
+            drawPicture(record, 120);
+            canvas->translate(0, SkIntToScalar(120));
+
+            SkRect clip;
+            clip.set(0, 0, SkIntToScalar(160), SkIntToScalar(160));
+            do {
+                canvas->save();
+                canvas->clipRect(clip);
+                picture.draw(canvas);
+                canvas->restore();
+                if (clip.fRight < SkIntToScalar(320))
+                    clip.offset(SkIntToScalar(160), 0);
+                else if (clip.fBottom < SkIntToScalar(480))
+                    clip.offset(-SkIntToScalar(320), SkIntToScalar(160));
+                else
+                    break;
+            } while (true);
+        }
+        Dump();
+    }
+    
+    void drawPicture(SkCanvas* canvas, int spriteOffset)
+    {
+	    SkMatrix matrix; matrix.reset();
+		SkPaint paint;
+		SkPath path;
+        SkPoint start = {0, 0};
+        SkPoint stop = { SkIntToScalar(40), SkIntToScalar(40) };
+		SkRect rect = {0, 0, SkIntToScalar(40), SkIntToScalar(40) };
+		SkRect rect2 = {0, 0, SkIntToScalar(65), SkIntToScalar(20) };
+		SkScalar left = 0, top = 0, x = 0, y = 0;
+		int index;
+		
+		char ascii[] = "ascii...";
+		size_t asciiLength = sizeof(ascii) - 1;
+		char utf8[] = "utf8" "\xe2\x80\xa6";
+		short utf16[] = {'u', 't', 'f', '1', '6', 0x2026 };
+		short utf16simple[] = {'u', 't', 'f', '1', '6', '!' };
+		
+        makePath(path);
+        SkTDArray<SkPoint>(pos);
+		pos.setCount(asciiLength);
+		for (index = 0;  index < asciiLength; index++)
+			pos[index].set(SkIntToScalar(index * 10), SkIntToScalar(index * 2));
+        SkTDArray<SkPoint>(pos2);
+		pos2.setCount(asciiLength);
+		for (index = 0;  index < asciiLength; index++)
+			pos2[index].set(SkIntToScalar(index * 10), SkIntToScalar(20));
+		
+        // shaders
+        SkPoint linearPoints[] = { 0, 0, SkIntToScalar(40), SkIntToScalar(40) };
+        SkColor linearColors[] = { SK_ColorRED, SK_ColorBLUE };
+        SkScalar* linearPos = NULL;
+        int linearCount = 2;
+        SkShader::TileMode linearMode = SkShader::kMirror_TileMode;
+        SkUnitMapper* linearMapper = new SkDiscreteMapper(3);
+        SkAutoUnref unmapLinearMapper(linearMapper);
+        SkShader* linear = SkGradientShader::CreateLinear(linearPoints,
+            linearColors, linearPos, linearCount, linearMode, linearMapper);
+
+        SkPoint radialCenter = { SkIntToScalar(25), SkIntToScalar(25) };
+        SkScalar radialRadius = SkIntToScalar(25);
+        SkColor radialColors[] = { SK_ColorGREEN, SK_ColorGRAY, SK_ColorRED };
+        SkScalar radialPos[] = { 0, SkIntToScalar(3) / 5, SkIntToScalar(1)};
+        int radialCount = 3;
+        SkShader::TileMode radialMode = SkShader::kRepeat_TileMode;
+        SkUnitMapper* radialMapper = new SkCosineMapper();
+        SkAutoUnref unmapRadialMapper(radialMapper);
+        SkShader* radial = SkGradientShader::CreateRadial(radialCenter, 
+            radialRadius, radialColors, radialPos, radialCount,
+            radialMode, radialMapper);
+        
+        SkTransparentShader* transparentShader = new SkTransparentShader();
+        SkEmbossMaskFilter::Light light;
+        light.fDirection[0] = SK_Scalar1/2;
+        light.fDirection[1] = SK_Scalar1/2;
+        light.fDirection[2] = SK_Scalar1/3;
+        light.fAmbient		= 0x48;
+        light.fSpecular		= 0x80;
+        SkScalar radius = SkIntToScalar(12)/5;
+        SkEmbossMaskFilter* embossFilter = new SkEmbossMaskFilter(light, 
+            radius);
+            
+        SkXfermode* xfermode = SkPorterDuff::CreateXfermode(SkPorterDuff::kXor_Mode);
+        SkColorFilter* lightingFilter = SkColorFilter::CreateLightingFilter(
+            0xff89bc45, 0xff112233);
+        
+        canvas->save();
+		canvas->translate(SkIntToScalar(0), SkIntToScalar(5));
+		paint.setFlags(SkPaint::kAntiAlias_Flag | SkPaint::kFilterBitmap_Flag);
+		// !!! draw through a clip
+		paint.setColor(SK_ColorLTGRAY);
+		paint.setStyle(SkPaint::kFill_Style);
+        SkRect clip = {0, 0, SkIntToScalar(320), SkIntToScalar(120)};
+        canvas->clipRect(clip);
+        paint.setShader(SkShader::CreateBitmapShader(fTx, 
+            SkShader::kMirror_TileMode, SkShader::kRepeat_TileMode))->unref();
+		canvas->drawPaint(paint);
+		canvas->save();
+        
+        // line (exercises xfermode, colorShader, colorFilter, filterShader)
+		paint.setColor(SK_ColorGREEN);
+		paint.setStrokeWidth(SkIntToScalar(10));
+		paint.setStyle(SkPaint::kStroke_Style);
+        paint.setXfermode(xfermode)->unref();
+        paint.setColorFilter(lightingFilter)->unref();
+		canvas->drawLine(start.fX, start.fY, stop.fX, stop.fY, paint); // should not be green
+		paint.setXfermode(NULL);
+        paint.setColorFilter(NULL);
+        
+        // rectangle
+		paint.setStyle(SkPaint::kFill_Style);
+		canvas->translate(SkIntToScalar(50), 0);
+		paint.setColor(SK_ColorYELLOW);
+        paint.setShader(linear)->unref();
+        paint.setPathEffect(pathEffectTest())->unref();
+		canvas->drawRect(rect, paint); 
+        paint.setPathEffect(NULL);
+        
+        // circle w/ emboss & transparent (exercises 3dshader)
+		canvas->translate(SkIntToScalar(50), 0);
+        paint.setMaskFilter(embossFilter)->unref();
+        canvas->drawOval(rect, paint);
+		canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
+        paint.setShader(transparentShader)->unref();
+        canvas->drawOval(rect, paint);
+		canvas->translate(0, SkIntToScalar(-10));
+        
+        // path
+		canvas->translate(SkIntToScalar(50), 0);
+		paint.setColor(SK_ColorRED);
+		paint.setStyle(SkPaint::kStroke_Style);
+		paint.setStrokeWidth(SkIntToScalar(5));
+        paint.setShader(radial)->unref();
+        paint.setMaskFilter(NULL);
+		canvas->drawPath(path, paint);
+		
+        paint.setShader(NULL);
+        // bitmap, sprite
+		canvas->translate(SkIntToScalar(50), 0);
+		paint.setStyle(SkPaint::kFill_Style);
+		canvas->drawBitmap(fBug, left, top, &paint);
+		canvas->translate(SkIntToScalar(30), 0);
+		canvas->drawSprite(fTb, 
+			SkScalarRound(canvas->getTotalMatrix().getTranslateX()), 
+            spriteOffset + 10, &paint);
+
+		canvas->translate(-SkIntToScalar(30), SkIntToScalar(30));
+        paint.setShader(shaderTest())->unref(); // test compose shader
+		canvas->drawRect(rect2, paint); 
+        paint.setShader(NULL);
+		
+        canvas->restore();
+        // text
+		canvas->translate(0, SkIntToScalar(60));
+        canvas->save();
+		paint.setColor(SK_ColorGRAY);
+		canvas->drawPosText(ascii, asciiLength, pos.begin(), paint);
+		canvas->drawPosText(ascii, asciiLength, pos2.begin(), paint);
+
+		canvas->translate(SkIntToScalar(50), 0);
+		paint.setColor(SK_ColorCYAN);
+		canvas->drawText(utf8, sizeof(utf8) - 1, x, y, paint);
+       
+		canvas->translate(SkIntToScalar(30), 0);
+		paint.setColor(SK_ColorMAGENTA);
+		paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
+        matrix.setTranslate(SkIntToScalar(10), SkIntToScalar(10));
+		canvas->drawTextOnPath((void*) utf16, sizeof(utf16), path, &matrix, paint);
+		canvas->translate(0, SkIntToScalar(20));
+		canvas->drawTextOnPath((void*) utf16simple, sizeof(utf16simple), path, &matrix, paint);
+        canvas->restore();
+        
+        canvas->translate(0, SkIntToScalar(60));
+		paint.setTextEncoding(SkPaint::kUTF8_TextEncoding);
+        canvas->restore();
+    }
+    
+    /*
+./SkColorFilter.h:25:class SkColorFilter : public SkFlattenable { -- abstract
+    static SkColorFilter* CreatXfermodeFilter() *** untested ***
+    static SkColorFilter* CreatePorterDuffFilter() *** untested ***
+    static SkColorFilter* CreateLightingFilter() -- tested
+./SkDrawLooper.h:9:class SkDrawLooper : public SkFlattenable { -- virtually abstract
+    ./SkBlurDrawLooper.h:9:class SkBlurDrawLooper : public SkDrawLooper { *** untested ***
+./SkMaskFilter.h:41:class SkMaskFilter : public SkFlattenable { -- abstract chmod +w .h
+    ./SkEmbossMaskFilter.h:27:class SkEmbossMaskFilter : public SkMaskFilter { -- tested
+./SkPathEffect.h:33:class SkPathEffect : public SkFlattenable { -- abstract
+    ./Sk1DPathEffect.h:27:class Sk1DPathEffect : public SkPathEffect { -- abstract
+        ./Sk1DPathEffect.h:48:class SkPath1DPathEffect : public Sk1DPathEffect { -- tested
+    ./Sk2DPathEffect.h:25:class Sk2DPathEffect : public SkPathEffect { *** untested ***
+    ./SkCornerPathEffect.h:28:class SkCornerPathEffect : public SkPathEffect { *** untested ***
+    ./SkDashPathEffect.h:27:class SkDashPathEffect : public SkPathEffect {
+    ./SkDiscretePathEffect.h:27:class SkDiscretePathEffect : public SkPathEffect {
+    ./SkPaint.h:760:class SkStrokePathEffect : public SkPathEffect {
+    ./SkPathEffect.h:58:class SkPairPathEffect : public SkPathEffect {
+        ./SkPathEffect.h:78:class SkComposePathEffect : public SkPairPathEffect {
+        ./SkPathEffect.h:114:class SkSumPathEffect : public SkPairPathEffect {
+./SkRasterizer.h:29:class SkRasterizer : public SkFlattenable {
+    ./SkLayerRasterizer.h:27:class SkLayerRasterizer : public SkRasterizer {
+./SkShader.h:36:class SkShader : public SkFlattenable {
+    ./SkColorFilter.h:59:class SkFilterShader : public SkShader {
+    ./SkColorShader.h:26:class SkColorShader : public SkShader {
+    ./SkShaderExtras.h:31:class SkComposeShader : public SkShader {
+    ./SkTransparentShader.h:23:class SkTransparentShader : public SkShader {
+./SkUnitMapper.h:24:class SkUnitMapper : public SkFlattenable {
+    ./SkUnitMapper.h:33:class SkDiscreteMapper : public SkUnitMapper {
+    ./SkUnitMapper.h:51:class SkFlipCosineMapper : public SkUnitMapper {
+./SkXfermode.h:32:class SkXfermode : public SkFlattenable {
+    ./SkAvoidXfermode.h:28:class SkAvoidXfermode : public SkXfermode { *** not done *** chmod +w .h .cpp
+    ./SkXfermode.h:54:class SkProcXfermode : public SkXfermode {
+    */
+    
+    /*
+./SkBlurMaskFilter.h:25:class SkBlurMaskFilter {
+    chmod +w SkBlurMaskFilter.cpp
+./SkGradientShader.h:30:class SkGradientShader {
+    */
+        // save layer, bounder, looper
+        // matrix
+        // clip /path/region
+        // bitmap proc shader ?
+
+/* untested:
+SkCornerPathEffect.h:28:class SkCornerPathEffect : public SkPathEffect {
+*/
+    
+    virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) 
+    {
+        fClickPt.set(x, y);
+        this->inval(NULL);
+        return this->INHERITED::onFindClickHandler(x, y);
+    }
+    
+    SkPathEffect* pathEffectTest()
+    {
+        static const int gXY[] = { 1, 0, 0, -1, 2, -1, 3, 0, 2, 1, 0, 1 };
+        SkScalar gPhase = 0;
+        SkPath path;
+        path.moveTo(SkIntToScalar(gXY[0]), SkIntToScalar(gXY[1]));
+        for (unsigned i = 2; i < SK_ARRAY_COUNT(gXY); i += 2)
+            path.lineTo(SkIntToScalar(gXY[i]), SkIntToScalar(gXY[i+1]));
+        path.close();
+        path.offset(SkIntToScalar(-6), 0);
+        SkPathEffect* outer = new SkPath1DPathEffect(path, SkIntToScalar(12), 
+            gPhase, SkPath1DPathEffect::kRotate_Style);
+        SkPathEffect* inner = new SkDiscretePathEffect(SkIntToScalar(2), 
+            SkIntToScalar(1)/10); // SkCornerPathEffect(SkIntToScalar(2));
+        SkPathEffect* result = new SkComposePathEffect(outer, inner);
+        outer->unref();
+        inner->unref();
+        return result;
+    }
+    
+    SkPathEffect* pathEffectTest2() // unsure this works (has no visible effect)
+    {
+        SkPathEffect* outer = new SkStrokePathEffect(SkIntToScalar(4), 
+            SkPaint::kStroke_Style, SkPaint::kMiter_Join, SkPaint::kButt_Cap);
+        static const SkScalar intervals[] = {SkIntToScalar(1), SkIntToScalar(2),
+            SkIntToScalar(2), SkIntToScalar(1)};
+        SkPathEffect* inner = new SkDashPathEffect(intervals, 
+            sizeof(intervals) / sizeof(intervals[0]), 0);
+        SkPathEffect* result = new SkSumPathEffect(outer, inner);
+        outer->unref();
+        inner->unref();
+        return result;
+    }
+    
+    SkShader* shaderTest()
+    {
+        SkPoint pts[] = {0, 0, SkIntToScalar(100), 0 };
+        SkColor colors[] = { SK_ColorRED, SK_ColorBLUE };
+        SkShader* shaderA = SkGradientShader::CreateLinear(pts, colors, NULL, 
+            2, SkShader::kClamp_TileMode);
+        pts[1].set(0, SkIntToScalar(100));
+        SkColor colors2[] = {SK_ColorBLACK,  SkColorSetARGB(0x80, 0, 0, 0)};
+        SkShader* shaderB = SkGradientShader::CreateLinear(pts, colors2, NULL, 
+            2, SkShader::kClamp_TileMode);
+        SkXfermode* mode = SkPorterDuff::CreateXfermode(SkPorterDuff::kDstIn_Mode);
+        SkShader* result = new SkComposeShader(shaderA, shaderB, mode);
+        shaderA->unref();
+        shaderB->unref();
+        mode->unref();
+        return result;
+    }
+
+    virtual void startTest() {
+		SkImageDecoder::DecodeFile("/Users/caryclark/Desktop/bugcirc.gif", &fBug);
+		SkImageDecoder::DecodeFile("/Users/caryclark/Desktop/tbcirc.gif", &fTb);
+		SkImageDecoder::DecodeFile("/Users/caryclark/Desktop/05psp04.gif", &fTx);
+	}
+
+    void drawRaster(SkCanvas* canvas) 
+    {
+        for (int index = 0; index < SK_ARRAY_COUNT(gRastProcs); index++)
+            drawOneRaster(canvas);
+    }
+    
+    void drawOneRaster(SkCanvas* canvas)
+    {        
+        canvas->save();
+//        canvas->scale(SK_Scalar1*2, SK_Scalar1*2, 0, 0);
+
+        SkScalar    x = SkIntToScalar(20);
+        SkScalar    y = SkIntToScalar(40);
+        SkPaint     paint;
+        
+        paint.setAntiAlias(true);
+        paint.setTextSize(SkIntToScalar(48));
+        paint.setTypeface(SkTypeface::Create("sans-serif", SkTypeface::kBold));
+
+        SkString str("GOOGLE");
+
+        for (int i = 0; i < SK_ARRAY_COUNT(gRastProcs); i++)
+        {
+            apply_shader(&paint, i);
+            
+          //  paint.setMaskFilter(NULL);
+          //  paint.setColor(SK_ColorBLACK);
+
+#if 01
+            int index = i % SK_ARRAY_COUNT(gLightingColors);
+            paint.setColorFilter(SkColorFilter::CreateLightingFilter(
+                                    gLightingColors[index].fMul,
+                                    gLightingColors[index].fAdd))->unref();
+#endif
+            
+            canvas->drawText(str.c_str(), str.size(), x, y, paint);
+            SkRect  oval = { x, y - SkIntToScalar(40), x + SkIntToScalar(40), y };
+            paint.setStyle(SkPaint::kStroke_Style);
+            canvas->drawOval(oval, paint);
+            paint.setStyle(SkPaint::kFill_Style);
+            if (0)
+            {
+                SkPath path;
+                paint.getTextPath(str.c_str(), str.size(), x + SkIntToScalar(260), y, &path);
+                canvas->drawPath(path, paint);
+            }
+
+            y += paint.getFontSpacing();
+        }
+
+        canvas->restore();
+        
+        if (0)
+        {
+            SkPoint pts[] = { 0, 0, 0, SkIntToScalar(150) };
+            SkColor colors[] = { 0xFFE6E6E6, 0xFFFFFFFF };
+            SkShader* s = SkGradientShader::CreateLinear(pts, colors, NULL, 2, SkShader::kClamp_TileMode);
+
+            paint.reset();
+            paint.setShader(s)->unref();
+            canvas->drawRectCoords(0, 0, SkIntToScalar(120), SkIntToScalar(150), paint);
+        }
+        
+        if (1)
+        {
+            SkAvoidXfermode   mode(SK_ColorWHITE, 0xFF,
+                                   SkAvoidXfermode::kTargetColor_Mode);
+            SkPaint paint;
+            x += SkIntToScalar(20);
+            SkRect  r = { x, 0, x + SkIntToScalar(360), SkIntToScalar(700) };
+            paint.setXfermode(&mode);
+            paint.setColor(SK_ColorGREEN);
+            paint.setAntiAlias(true);
+            canvas->drawOval(r, paint);
+        }
+    }
+
+private:
+    SkPoint fClickPt;
+    SkBitmap fBug, fTb, fTx;
+    typedef SkView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new DemoView; }
+static SkViewRegister reg(MyFactory);
+