AuroraMiddleware/skia2
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

update

Browse Source 
git-svn-id: http://skia.googlecode.com/svn/trunk@484 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
reed@android.com 2010-01-28 21:24:01 +00:00
parent 872057a460
commit 2736a69077
1 changed files with 75 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

81
samplecode/SampleWarp.cpp
View File

@ -11,6 +11,8 @@
#include "SkBlurMaskFilter.h"
#include "SkTableMaskFilter.h"
#define kNearlyZero (SK_Scalar1 / 8092)
static void test_bigblur(SkCanvas* canvas) {
canvas->drawColor(SK_ColorBLACK);
@ -321,10 +323,11 @@ void Mesh::drawWireframe(SkCanvas* canvas, const SkPaint& paint) {
class WarpView : public SkView {
Mesh fMesh, fOrig;
SkBitmap fBitmap;
SkMatrix fMatrix, fInverse;
public:
WarpView() {
SkBitmap bm;
SkImageDecoder::DecodeFile("/skimages/beach.jpg", &bm);
SkImageDecoder::DecodeFile("/skimages/logo.gif", &bm);
// SkImageDecoder::DecodeFile("/beach_shot.JPG", &bm);
fBitmap = bm;
@ -334,11 +337,14 @@ public:
bounds = texture;
// fMesh.init(bounds, fBitmap.width() / 40, fBitmap.height() / 40, texture);
fMesh.init(bounds, 30, 30, texture);
fMesh.init(bounds, fBitmap.width()/16, fBitmap.height()/16, texture);
fOrig = fMesh;
fP0.set(0, 0);
fP1 = fP0;
fMatrix.setScale(2, 2);
fMatrix.invert(&fInverse);
}
protected:
@ -351,7 +357,66 @@ protected:
return this->INHERITED::onQuery(evt);
}
static SkPoint apply_warp(const SkVector& drag, SkScalar dragLength,
const SkPoint& dragStart, const SkPoint& dragCurr,
const SkPoint& orig) {
SkVector delta = orig - dragCurr;
SkScalar length = SkPoint::Normalize(&delta);
if (length <= kNearlyZero) {
return orig;
}
const SkScalar period = 20;
const SkScalar mag = dragLength / 3;
SkScalar d = length / (period);
d = mag * SkScalarSin(d) / d;
SkScalar dx = delta.fX * d;
SkScalar dy = delta.fY * d;
SkScalar px = orig.fX + dx;
SkScalar py = orig.fY + dy;
return SkPoint::Make(px, py);
}
static SkPoint apply_warp2(const SkVector& drag, SkScalar dragLength,
const SkPoint& dragStart, const SkPoint& dragCurr,
const SkPoint& orig) {
SkVector delta = orig - dragCurr;
SkScalar length = SkPoint::Normalize(&delta);
if (length <= kNearlyZero) {
return orig;
}
const SkScalar period = 20;
const SkScalar mag = dragLength / 3;
SkScalar d = length / (period);
if (d > SK_ScalarPI) {
d = SK_ScalarPI;
}
d = -mag * SkScalarSin(d);
SkScalar dx = delta.fX * d;
SkScalar dy = delta.fY * d;
SkScalar px = orig.fX + dx;
SkScalar py = orig.fY + dy;
return SkPoint::Make(px, py);
}
typedef SkPoint (*WarpProc)(const SkVector& drag, SkScalar dragLength,
const SkPoint& dragStart, const SkPoint& dragCurr,
const SkPoint& orig);
void warp(const SkPoint& p0, const SkPoint& p1) {
WarpProc proc = apply_warp2;
SkPoint delta = p1 - p0;
SkScalar length = SkPoint::Normalize(&delta);
for (int y = 0; y < fMesh.rows(); y++) {
for (int x = 0; x < fMesh.cols(); x++) {
fMesh.pt(x, y) = proc(delta, length, p0, p1, fOrig.pt(x, y));
}
}
fP0 = p0;
fP1 = p1;
}
@ -360,18 +425,20 @@ protected:
canvas->drawColor(SK_ColorLTGRAY);
// test_bigblur(canvas); return;
canvas->concat(fMatrix);
SkPaint paint;
paint.setFilterBitmap(true);
paint.setShader(SkShader::CreateBitmapShader(fBitmap,
SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode))->unref();
// fMesh.draw(canvas, paint);
fMesh.draw(canvas, paint); //return;
paint.setShader(NULL);
paint.setColor(SK_ColorRED);
// fMesh.draw(canvas, paint);
fMesh.draw(canvas, paint);
test_drag(canvas, fBitmap, fP0, fP1);
// test_drag(canvas, fBitmap, fP0, fP1);
}
virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
@ -379,7 +446,9 @@ protected:
}
virtual bool onClick(Click* click) {
this->warp(click->fOrig, click->fCurr);
SkPoint pts[2] = { click->fOrig, click->fCurr };
fInverse.mapPoints(pts, 2);
this->warp(pts[0], pts[1]);
this->inval(NULL);
return true;
}