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Diffstat (limited to 'samplecode/SampleAAClip2.cpp')
| -rw-r--r-- | samplecode/SampleAAClip2.cpp | 194 |
1 files changed, 194 insertions, 0 deletions
diff --git a/samplecode/SampleAAClip2.cpp b/samplecode/SampleAAClip2.cpp new file mode 100644 index 0000000..d12e13c --- /dev/null +++ b/samplecode/SampleAAClip2.cpp @@ -0,0 +1,194 @@ + +/* + * Copyright 2011 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ +#include "SkAAClip.h" +#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_BUILD_FOR_WIN +// windows doesn't have roundf +inline float roundf(float x) { return (x-floor(x))>0.5 ? ceil(x) : floor(x); } +#endif + +static void drawClip(SkCanvas* canvas, const SkAAClip& clip) { + SkMask mask; + SkBitmap bm; + + clip.copyToMask(&mask); + SkAutoMaskFreeImage amfi(mask.fImage); + + bm.setConfig(SkBitmap::kA8_Config, mask.fBounds.width(), + mask.fBounds.height(), mask.fRowBytes); + bm.setPixels(mask.fImage); + + SkPaint paint; + canvas->drawBitmap(bm, + SK_Scalar1 * mask.fBounds.fLeft, + SK_Scalar1 * mask.fBounds.fTop, + &paint); +} + +static void paint_rgn(SkCanvas* canvas, const SkAAClip& clip, + const SkPaint& paint) { + SkMask mask; + SkBitmap bm; + + clip.copyToMask(&mask); + SkAutoMaskFreeImage amfi(mask.fImage); + + bm.setConfig(SkBitmap::kA8_Config, mask.fBounds.width(), + mask.fBounds.height(), mask.fRowBytes); + bm.setPixels(mask.fImage); + + canvas->drawBitmap(bm, + SK_Scalar1 * mask.fBounds.fLeft, + SK_Scalar1 * mask.fBounds.fTop, + &paint); +} + +class AAClipView2 : public SampleView { +public: + AAClipView2() { + fBase.set(100, 100, 150, 150); + fRect = fBase; + fRect.inset(5, 5); + fRect.offset(25, 25); + this->setBGColor(0xFFDDDDDD); + } + + static void setAAClip(SkAAClip* clip, const SkIRect& rect) { + SkRect r; + r.set(rect); + SkPath path; + path.addRoundRect(r, SkIntToScalar(5), SkIntToScalar(5)); + clip->setPath(path); + } + + void build_rgn(SkAAClip* clip, SkRegion::Op op) { + setAAClip(clip, fBase); + + SkAAClip clip2; + setAAClip(&clip2, fRect); + clip->op(clip2, op); + } + + +protected: + // overrides from SkEventSink + virtual bool onQuery(SkEvent* evt) { + if (SampleCode::TitleQ(*evt)) { + SampleCode::TitleR(evt, "AAClips"); + 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); + } + + static void outer_frame(SkCanvas* canvas, const SkIRect& rect) { + SkRect r; + r.set(rect); + r.inset(-SK_ScalarHalf, -SK_ScalarHalf); + + SkPaint paint; + paint.setColor(SK_ColorGRAY); + paint.setStyle(SkPaint::kStroke_Style); + canvas->drawRect(r, paint); + } + + void drawRgnOped(SkCanvas* canvas, SkRegion::Op op, SkColor color) { + SkAAClip clip; + + this->build_rgn(&clip, op); + + this->drawOrig(canvas, true); + + SkPaint paint; + paint.setColor((color & ~(0xFF << 24)) | (0x44 << 24)); + paint_rgn(canvas, clip, paint); + + paint.setStyle(SkPaint::kStroke_Style); + paint.setColor(color); + paint_rgn(canvas, clip, paint); + + SkAAClip clip2(clip); + clip2.translate(0, 80); + outer_frame(canvas, clip2.getBounds()); + paint_rgn(canvas, clip2, paint); + } + + virtual void onDrawContent(SkCanvas* canvas) { + + 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->translate(0, SkIntToScalar(200)); + + for (size_t 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); + + canvas->translate(SkIntToScalar(200), 0); + } + } + + virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) { + return fRect.contains(SkScalarRound(x), SkScalarRound(y)) ? new Click(this) : NULL; + } + + virtual bool onClick(Click* click) { + fRect.offset(click->fICurr.fX - click->fIPrev.fX, + click->fICurr.fY - click->fIPrev.fY); + this->inval(NULL); + return true; + } + +private: + SkIRect fBase, fRect; + + typedef SampleView INHERITED; +}; + +////////////////////////////////////////////////////////////////////////////// + +static SkView* MyFactory() { return new AAClipView2; } +static SkViewRegister reg(MyFactory); + |