skia2/samplecode/SampleRegion.cpp
mike@reedtribe.org 5fd9243fd6 switch to inheriting from SampleView
git-svn-id: http://skia.googlecode.com/svn/trunk@1249 2bbb7eff-a529-9590-31e7-b0007b416f81
2011-05-05 01:59:48 +00:00

274 lines
8.1 KiB
C++

#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
#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 scale_rect(SkIRect* dst, const SkIRect& src, float scale) {
dst->fLeft = (int)::roundf(src.fLeft * scale);
dst->fTop = (int)::roundf(src.fTop * scale);
dst->fRight = (int)::roundf(src.fRight * scale);
dst->fBottom = (int)::roundf(src.fBottom * scale);
}
static void scale_rgn(SkRegion* dst, const SkRegion& src, float scale) {
SkRegion tmp;
SkRegion::Iterator iter(src);
for (; !iter.done(); iter.next()) {
SkIRect r;
scale_rect(&r, iter.rect(), scale);
tmp.op(r, SkRegion::kUnion_Op);
}
dst->swap(tmp);
}
static void paint_rgn(SkCanvas* canvas, const SkRegion& rgn,
const SkPaint& paint) {
SkRegion scaled;
scale_rgn(&scaled, rgn, 0.5f);
SkRegion::Iterator iter(rgn);
for (; !iter.done(); iter.next())
{
SkRect r;
r.set(iter.rect());
canvas->drawRect(r, paint);
}
}
class RegionView : public SampleView {
public:
RegionView() {
fBase.set(100, 100, 150, 150);
fRect = fBase;
fRect.inset(5, 5);
fRect.offset(25, 25);
this->setBGColor(0xFFDDDDDD);
}
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);
}
virtual void onDrawContent(SkCanvas* 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);
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) : 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 RegionView; }
static SkViewRegister reg(MyFactory);