grab from latest android
git-svn-id: http://skia.googlecode.com/svn/trunk@27 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleRegion.cpp b/samplecode/SampleRegion.cpp
new file mode 100644
index 0000000..8958c82
--- /dev/null
+++ b/samplecode/SampleRegion.cpp
@@ -0,0 +1,329 @@
+#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 "SkImageDecoder.h"
+
+#ifdef SK_DEBUG
+static void make_rgn(SkRegion* rgn, int left, int top, int right, int bottom,
+ size_t count, int32_t runs[]) {
+ SkIRect r;
+ r.set(left, top, right, bottom);
+
+ rgn->debugSetRuns(runs, count);
+ SkASSERT(rgn->getBounds() == r);
+}
+
+static void test_union_bug_1505668(SkRegion* ra, SkRegion* rb, SkRegion* rc) {
+ static int32_t dataA[] = {
+ 0x00000001, 0x000001dd,
+ 0x00000001, 0x0000000c, 0x0000000d, 0x00000025,
+ 0x7fffffff, 0x000001de, 0x00000001, 0x00000025,
+ 0x7fffffff, 0x000004b3, 0x00000001, 0x00000026,
+ 0x7fffffff, 0x000004b4, 0x0000000c, 0x00000026,
+ 0x7fffffff, 0x00000579, 0x00000000, 0x0000013a,
+ 0x7fffffff, 0x000005d8, 0x00000000, 0x0000013b,
+ 0x7fffffff, 0x7fffffff
+ };
+ make_rgn(ra, 0, 1, 315, 1496, SK_ARRAY_COUNT(dataA), dataA);
+
+ static int32_t dataB[] = {
+ 0x000000b6, 0x000000c4,
+ 0x000000a1, 0x000000f0, 0x7fffffff, 0x000000d6,
+ 0x7fffffff, 0x000000e4, 0x00000070, 0x00000079,
+ 0x000000a1, 0x000000b0, 0x7fffffff, 0x000000e6,
+ 0x7fffffff, 0x000000f4, 0x00000070, 0x00000079,
+ 0x000000a1, 0x000000b0, 0x7fffffff, 0x000000f6,
+ 0x7fffffff, 0x00000104, 0x000000a1, 0x000000b0,
+ 0x7fffffff, 0x7fffffff
+ };
+ make_rgn(rb, 112, 182, 240, 260, SK_ARRAY_COUNT(dataB), dataB);
+
+ rc->op(*ra, *rb, SkRegion::kUnion_Op);
+}
+#endif
+
+static void paint_rgn(SkCanvas* canvas, const SkRegion& rgn, const SkPaint& paint)
+{
+ SkRegion::Iterator iter(rgn);
+
+ for (; !iter.done(); iter.next())
+ {
+ SkRect r;
+ r.set(iter.rect());
+ canvas->drawRect(r, paint);
+ }
+}
+
+class RegionView : public SkView {
+public:
+ RegionView()
+ {
+ fBase.set(100, 100, 150, 150);
+ fRect = fBase;
+ fRect.inset(5, 5);
+ fRect.offset(25, 25);
+ }
+
+ void build_rgn(SkRegion* rgn, SkRegion::Op op)
+ {
+ rgn->setRect(fBase);
+ SkIRect r = fBase;
+ r.offset(75, 20);
+ rgn->op(r, SkRegion::kUnion_Op);
+ rgn->op(fRect, op);
+ }
+
+
+protected:
+ // overrides from SkEventSink
+ virtual bool onQuery(SkEvent* evt)
+ {
+ if (SampleCode::TitleQ(*evt))
+ {
+ SampleCode::TitleR(evt, "Regions");
+ return true;
+ }
+ return this->INHERITED::onQuery(evt);
+ }
+
+ void drawOrig(SkCanvas* canvas, bool bg)
+ {
+ SkRect r;
+ SkPaint paint;
+
+ paint.setStyle(SkPaint::kStroke_Style);
+ if (bg)
+ paint.setColor(0xFFBBBBBB);
+
+ r.set(fBase);
+ canvas->drawRect(r, paint);
+ r.set(fRect);
+ canvas->drawRect(r, paint);
+ }
+
+ void drawRgnOped(SkCanvas* canvas, SkRegion::Op op, SkColor color)
+ {
+ SkRegion rgn;
+
+ this->build_rgn(&rgn, op);
+
+ {
+ SkRegion tmp, tmp2(rgn);
+
+ tmp = tmp2;
+ tmp.translate(5, -3);
+
+ {
+ char buffer[1000];
+ size_t size = tmp.flatten(NULL);
+ SkASSERT(size <= sizeof(buffer));
+ size_t size2 = tmp.flatten(buffer);
+ SkASSERT(size == size2);
+
+ SkRegion tmp3;
+ size2 = tmp3.unflatten(buffer);
+ SkASSERT(size == size2);
+
+ SkASSERT(tmp3 == tmp);
+ }
+
+ rgn.translate(20, 30, &tmp);
+ SkASSERT(rgn.isEmpty() || tmp != rgn);
+ tmp.translate(-20, -30);
+ SkASSERT(tmp == rgn);
+ }
+
+ this->drawOrig(canvas, true);
+
+ SkPaint paint;
+ paint.setColor((color & ~(0xFF << 24)) | (0x44 << 24));
+ paint_rgn(canvas, rgn, paint);
+
+ paint.setStyle(SkPaint::kStroke_Style);
+ paint.setColor(color);
+ paint_rgn(canvas, rgn, paint);
+ }
+
+ void drawPathOped(SkCanvas* canvas, SkRegion::Op op, SkColor color)
+ {
+ SkRegion rgn;
+ SkPath path;
+
+ this->build_rgn(&rgn, op);
+ rgn.getBoundaryPath(&path);
+
+ this->drawOrig(canvas, true);
+
+ SkPaint paint;
+
+ paint.setStyle(SkPaint::kFill_Style);
+ paint.setColor((color & ~(0xFF << 24)) | (0x44 << 24));
+ canvas->drawPath(path, paint);
+ paint.setColor(color);
+ paint.setStyle(SkPaint::kStroke_Style);
+ canvas->drawPath(path, paint);
+ }
+
+ void drawBG(SkCanvas* canvas)
+ {
+ canvas->drawColor(0xFFDDDDDD);
+ return;
+
+#if 0
+ SkColorTable ct;
+ SkPMColor colors[] = { SK_ColorRED, SK_ColorBLUE };
+ ct.setColors(colors, 2);
+ ct.setFlags(ct.getFlags() | SkColorTable::kColorsAreOpaque_Flag);
+
+ SkBitmap bm;
+ bm.setConfig(SkBitmap::kIndex8_Config, 20, 20, 21);
+ bm.setColorTable(&ct);
+ bm.allocPixels();
+ sk_memset16((uint16_t*)bm.getAddr8(0, 0), 0x0001, bm.rowBytes() * bm.height() / 2);
+#endif
+#if 0
+ SkBitmap bm;
+ bm.setConfig(SkBitmap::kRGB_565_Config, 20, 20, 42);
+ bm.allocPixels();
+ sk_memset32((uint32_t*)bm.getAddr16(0, 0), 0x0000FFFF, bm.rowBytes() * bm.height() / 4);
+#endif
+#if 1
+ SkBitmap bm;
+ bm.setConfig(SkBitmap::kARGB_8888_Config, 20, 20);
+ bm.allocPixels();
+ sk_memset32((uint32_t*)bm.getAddr32(0, 0), 0xFFDDDDDD, bm.rowBytes() * bm.height() / 4);
+#endif
+
+ SkPaint paint;
+
+// SkShader* shader = SkShader::CreateBitmapShader(bm, false, SkPaint::kBilinear_FilterType, SkShader::kRepeat_TileMode);
+ SkPoint pts[] = { 0, 0, SkIntToScalar(100), SkIntToScalar(0) };
+ SkColor colors[] = { SK_ColorBLACK, SK_ColorWHITE };
+ SkShader* shader = SkGradientShader::CreateLinear(pts, colors, nil, 2, SkShader::kMirror_TileMode);
+ paint.setShader(shader)->unref();
+
+ canvas->drawPaint(paint);
+ }
+
+ virtual void onDraw(SkCanvas* canvas)
+ {
+ if (true) {
+ SkRect r = { 0, 0, 1 << 30, 1 << 30 };
+ bool open = canvas->clipRect(r);
+ SkDebugf("---- giant clip is %d\n", open);
+ }
+ this->drawBG(canvas);
+
+#ifdef SK_DEBUG
+ if (true) {
+ SkRegion a, b, c;
+ test_union_bug_1505668(&a, &b, &c);
+
+ if (false) { // draw the result of the test
+ SkPaint paint;
+
+ canvas->translate(SkIntToScalar(10), SkIntToScalar(10));
+ paint.setColor(SK_ColorRED);
+ paint_rgn(canvas, a, paint);
+ paint.setColor(0x800000FF);
+ paint_rgn(canvas, b, paint);
+ paint.setColor(SK_ColorBLACK);
+ paint.setStyle(SkPaint::kStroke_Style);
+ // paint_rgn(canvas, c, paint);
+ return;
+ }
+ }
+#endif
+
+ static const struct {
+ SkColor fColor;
+ const char* fName;
+ SkRegion::Op fOp;
+ } gOps[] = {
+ { SK_ColorBLACK, "Difference", SkRegion::kDifference_Op },
+ { SK_ColorRED, "Intersect", SkRegion::kIntersect_Op },
+ { 0xFF008800, "Union", SkRegion::kUnion_Op },
+ { SK_ColorBLUE, "XOR", SkRegion::kXOR_Op }
+ };
+
+ SkPaint textPaint;
+ textPaint.setAntiAlias(true);
+ textPaint.setTextSize(SK_Scalar1*24);
+
+ this->drawOrig(canvas, false);
+ canvas->save();
+ canvas->translate(SkIntToScalar(200), 0);
+ this->drawRgnOped(canvas, SkRegion::kUnion_Op, SK_ColorBLACK);
+ canvas->restore();
+
+ canvas->translate(0, SkIntToScalar(200));
+
+ for (int op = 0; op < SK_ARRAY_COUNT(gOps); op++)
+ {
+ canvas->drawText(gOps[op].fName, strlen(gOps[op].fName), SkIntToScalar(75), SkIntToScalar(50), textPaint);
+
+ this->drawRgnOped(canvas, gOps[op].fOp, gOps[op].fColor);
+
+ if (true)
+ {
+ canvas->save();
+ canvas->translate(0, SkIntToScalar(200));
+ this->drawPathOped(canvas, gOps[op].fOp, gOps[op].fColor);
+ canvas->restore();
+ }
+
+ canvas->translate(SkIntToScalar(200), 0);
+ }
+
+ if (false)
+ {
+ SkBitmap bitmap;
+
+ bitmap.setConfig(SkBitmap::kARGB_8888_Config, 100, 100);
+ bitmap.allocPixels();
+ bitmap.eraseColor(0);
+
+ SkCanvas canvas(bitmap);
+ SkPaint paint;
+ SkRect r;
+
+ paint.setAntiAlias(true);
+ paint.setARGB(0xFF, 0xFF, 0, 0xFF);
+ r.set(0, 0, SkIntToScalar(100), SkIntToScalar(100));
+ canvas.drawOval(r, paint);
+
+ SkImageEncoder* en = SkImageEncoder::Create(SkImageEncoder::kPNG_Type);
+ en->encodeFile("testfile.png", bitmap);
+ delete en;
+ }
+ }
+
+ virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y)
+ {
+ return fRect.contains(SkScalarRound(x), SkScalarRound(y)) ? new Click(this) : nil;
+ }
+
+ virtual bool onClick(Click* click)
+ {
+ fRect.offset(click->fICurr.fX - click->fIPrev.fX,
+ click->fICurr.fY - click->fIPrev.fY);
+ this->inval(nil);
+ return true;
+ }
+
+private:
+ SkIRect fBase, fRect;
+
+ typedef SkView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new RegionView; }
+static SkViewRegister reg(MyFactory);
+