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Diffstat (limited to 'samplecode/SampleRegion.cpp')
| -rw-r--r-- | samplecode/SampleRegion.cpp | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/samplecode/SampleRegion.cpp b/samplecode/SampleRegion.cpp new file mode 100644 index 0000000..fd20a81 --- /dev/null +++ b/samplecode/SampleRegion.cpp @@ -0,0 +1,325 @@ +#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); + + if (false) { + SkPaint paint; + paint.setAntiAlias(true); + SkBitmap bm; + bm.setConfig(SkBitmap::kA8_Config, 100, 100); + bm.allocPixels(); + bm.eraseColor(0); + SkCanvas c(bm); + c.drawCircle(50, 50, 50, paint); + + paint.setColor(SK_ColorBLUE); + canvas->drawBitmap(bm, 0, 0, &paint); + canvas->scale(SK_Scalar1/2, SK_Scalar1/2); + paint.setColor(SK_ColorRED); + canvas->drawBitmap(bm, 0, 0, &paint); + return; + } + +#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); + } + } + + 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); + |