check-point for aaclip
git-svn-id: http://skia.googlecode.com/svn/trunk@2419 2bbb7eff-a529-9590-31e7-b0007b416f81
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reed@google.com
parent
1deaab51e7
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175
samplecode/SampleAAClip2.cpp
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175
samplecode/SampleAAClip2.cpp
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@ -0,0 +1,175 @@
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "SkAAClip.h"
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#include "SampleCode.h"
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#include "SkView.h"
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#include "SkCanvas.h"
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#include "SkGradientShader.h"
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#include "SkPath.h"
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#include "SkRegion.h"
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#include "SkShader.h"
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#include "SkUtils.h"
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#include "SkImageDecoder.h"
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#ifdef SK_BUILD_FOR_WIN
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// windows doesn't have roundf
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inline float roundf(float x) { return (x-floor(x))>0.5 ? ceil(x) : floor(x); }
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#endif
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static void drawClip(SkCanvas* canvas, const SkAAClip& clip) {
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SkMask mask;
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SkBitmap bm;
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clip.copyToMask(&mask);
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bm.setConfig(SkBitmap::kA8_Config, mask.fBounds.width(),
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mask.fBounds.height(), mask.fRowBytes);
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bm.setPixels(mask.fImage);
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SkPaint paint;
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canvas->drawBitmap(bm, mask.fBounds.fLeft, mask.fBounds.fTop, &paint);
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}
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static void paint_rgn(SkCanvas* canvas, const SkAAClip& clip,
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const SkPaint& paint) {
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SkMask mask;
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SkBitmap bm;
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clip.copyToMask(&mask);
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bm.setConfig(SkBitmap::kA8_Config, mask.fBounds.width(),
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mask.fBounds.height(), mask.fRowBytes);
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bm.setPixels(mask.fImage);
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canvas->drawBitmap(bm, mask.fBounds.fLeft, mask.fBounds.fTop, &paint);
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}
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class AAClipView2 : public SampleView {
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public:
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AAClipView2() {
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fBase.set(100, 100, 150, 150);
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fRect = fBase;
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fRect.inset(5, 5);
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fRect.offset(25, 25);
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this->setBGColor(0xFFDDDDDD);
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}
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void build_rgn(SkAAClip* clip, SkRegion::Op op) {
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clip->setRect(fBase);
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#if 0
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SkIRect r = fBase;
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r.offset(75, 20);
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rgn->op(r, SkRegion::kUnion_Op);
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#endif
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SkRect r;
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r.set(fRect);
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SkPath path;
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path.addOval(r);
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SkAAClip clip2;
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clip2.setPath(path);
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// hack
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op = SkRegion::kIntersect_Op;
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clip->op(clip2, op);
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}
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protected:
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// overrides from SkEventSink
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virtual bool onQuery(SkEvent* evt) {
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if (SampleCode::TitleQ(*evt)) {
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SampleCode::TitleR(evt, "AAClips");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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void drawOrig(SkCanvas* canvas, bool bg) {
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SkRect r;
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SkPaint paint;
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paint.setStyle(SkPaint::kStroke_Style);
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if (bg)
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paint.setColor(0xFFBBBBBB);
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r.set(fBase);
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canvas->drawRect(r, paint);
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r.set(fRect);
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canvas->drawRect(r, paint);
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}
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void drawRgnOped(SkCanvas* canvas, SkRegion::Op op, SkColor color) {
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SkAAClip clip;
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this->build_rgn(&clip, op);
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this->drawOrig(canvas, true);
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SkPaint paint;
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paint.setColor((color & ~(0xFF << 24)) | (0x44 << 24));
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paint_rgn(canvas, clip, paint);
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setColor(color);
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paint_rgn(canvas, clip, paint);
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}
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virtual void onDrawContent(SkCanvas* canvas) {
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static const struct {
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SkColor fColor;
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const char* fName;
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SkRegion::Op fOp;
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} gOps[] = {
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{ SK_ColorBLACK, "Difference", SkRegion::kDifference_Op },
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{ SK_ColorRED, "Intersect", SkRegion::kIntersect_Op },
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{ 0xFF008800, "Union", SkRegion::kUnion_Op },
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{ SK_ColorBLUE, "XOR", SkRegion::kXOR_Op }
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};
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SkPaint textPaint;
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textPaint.setAntiAlias(true);
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textPaint.setTextSize(SK_Scalar1*24);
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this->drawOrig(canvas, false);
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canvas->save();
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canvas->translate(SkIntToScalar(200), 0);
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this->drawRgnOped(canvas, SkRegion::kUnion_Op, SK_ColorBLACK);
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canvas->restore();
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canvas->translate(0, SkIntToScalar(200));
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for (size_t op = 0; op < SK_ARRAY_COUNT(gOps); op++) {
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canvas->drawText(gOps[op].fName, strlen(gOps[op].fName), SkIntToScalar(75), SkIntToScalar(50), textPaint);
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this->drawRgnOped(canvas, gOps[op].fOp, gOps[op].fColor);
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canvas->translate(SkIntToScalar(200), 0);
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}
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}
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virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
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return fRect.contains(SkScalarRound(x), SkScalarRound(y)) ? new Click(this) : NULL;
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}
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virtual bool onClick(Click* click) {
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fRect.offset(click->fICurr.fX - click->fIPrev.fX,
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click->fICurr.fY - click->fIPrev.fY);
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this->inval(NULL);
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return true;
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}
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private:
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SkIRect fBase, fRect;
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typedef SampleView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new AAClipView2; }
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static SkViewRegister reg(MyFactory);
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@ -112,7 +112,7 @@ void SkAAClip::Iter::next() {
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///////////////////////////////////////////////////////////////////////////////
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void SkAAClip::freeRuns() {
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if (this->isComplex()) {
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if (fRunHead) {
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SkASSERT(fRunHead->fRefCnt >= 1);
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if (1 == sk_atomic_dec(&fRunHead->fRefCnt)) {
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sk_free(fRunHead);
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@ -122,11 +122,11 @@ void SkAAClip::freeRuns() {
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SkAAClip::SkAAClip() {
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fBounds.setEmpty();
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fRunHead = SkAAClip_gEmptyPtr;
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fRunHead = NULL;
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}
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SkAAClip::SkAAClip(const SkAAClip& src) {
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fRunHead = SkAAClip_gEmptyPtr;
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fRunHead = NULL;
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*this = src;
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}
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@ -139,7 +139,7 @@ SkAAClip& SkAAClip::operator=(const SkAAClip& src) {
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this->freeRuns();
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fBounds = src.fBounds;
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fRunHead = src.fRunHead;
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if (this->isComplex()) {
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if (fRunHead) {
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sk_atomic_inc(&fRunHead->fRefCnt);
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}
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}
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@ -163,7 +163,7 @@ bool operator==(const SkAAClip& a, const SkAAClip& b) {
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}
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// now we insist that both are complex (but different ptrs)
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if (!a.isComplex() || !b.isComplex()) {
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if (!a.fRunHead || !b.fRunHead) {
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return false;
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}
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@ -185,7 +185,7 @@ bool SkAAClip::set(const SkAAClip& src) {
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bool SkAAClip::setEmpty() {
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this->freeRuns();
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fBounds.setEmpty();
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fRunHead = SkAAClip_gEmptyPtr;
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fRunHead = NULL;
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return false;
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}
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@ -193,10 +193,14 @@ bool SkAAClip::setRect(const SkIRect& bounds) {
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if (bounds.isEmpty()) {
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return this->setEmpty();
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}
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this->freeRuns();
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fBounds = bounds;
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fRunHead = SkAAClip_gRectPtr;
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return true;
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// TODO: special case this
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SkRect r;
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r.set(bounds);
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SkPath path;
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path.addRect(r);
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return this->setPath(path);
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}
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bool SkAAClip::setRect(const SkRect& r) {
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@ -212,7 +216,7 @@ bool SkAAClip::setRect(const SkRect& r) {
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///////////////////////////////////////////////////////////////////////////////
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const uint8_t* SkAAClip::findRow(int y, int* lastYForRow) const {
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SkASSERT(this->isComplex());
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SkASSERT(fRunHead);
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if (!y_in_rect(y, fBounds)) {
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return NULL;
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@ -894,6 +898,22 @@ bool SkAAClip::op(const SkAAClip& clipAOrig, const SkAAClip& clipBOrig,
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return !this->isEmpty();
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}
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bool SkAAClip::op(const SkIRect& r, SkRegion::Op op) {
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SkAAClip clip;
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clip.setRect(r);
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return this->op(*this, clip, op);
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}
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bool SkAAClip::op(const SkRect& r, SkRegion::Op op) {
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SkAAClip clip;
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clip.setRect(r);
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return this->op(*this, clip, op);
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}
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bool SkAAClip::op(const SkAAClip& clip, SkRegion::Op op) {
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return this->op(*this, clip, op);
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}
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///////////////////////////////////////////////////////////////////////////////
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///////////////////////////////////////////////////////////////////////////////
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@ -12,9 +12,6 @@
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#include "SkBlitter.h"
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#include "SkRegion.h"
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#define SkAAClip_gEmptyPtr ((SkAAClip::RunHead*)-1)
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#define SkAAClip_gRectPtr NULL
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class SkAAClip {
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public:
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SkAAClip();
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@ -29,9 +26,7 @@ public:
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void swap(SkAAClip&);
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bool isEmpty() const { return SkAAClip_gEmptyPtr == fRunHead; }
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// bool isRect() const { return SkAAClip_gRectPtr == fRunHead; }
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bool isComplex() const { return !this->isEmpty() /*&& !this->isRect()*/; }
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bool isEmpty() const { return NULL == fRunHead; }
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const SkIRect& getBounds() const { return fBounds; }
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bool setEmpty();
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@ -42,6 +37,11 @@ public:
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bool op(const SkAAClip&, const SkAAClip&, SkRegion::Op);
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// Helpers for op()
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bool op(const SkIRect&, SkRegion::Op);
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bool op(const SkRect&, SkRegion::Op);
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bool op(const SkAAClip&, SkRegion::Op);
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/**
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* Allocates a mask the size of the aaclip, and expands its data into
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* the mask, using kA8_Format
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