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Unified Diff: samplecode/SampleWarp.cpp

Issue 901933004: migrate more samples over to SkAnimTImer (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: fix warning Created 5 years, 10 months ago
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Index: samplecode/SampleWarp.cpp
diff --git a/samplecode/SampleWarp.cpp b/samplecode/SampleWarp.cpp
deleted file mode 100644
index e9455a6c3952c95ee02e3383d23daabe964d096b..0000000000000000000000000000000000000000
--- a/samplecode/SampleWarp.cpp
+++ /dev/null
@@ -1,473 +0,0 @@
-
-/*
- * 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 "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"
-
-#include "SkBlurMaskFilter.h"
-#include "SkTableMaskFilter.h"
-
-#define kNearlyZero (SK_Scalar1 / 8092)
-
-static void test_bigblur(SkCanvas* canvas) {
- canvas->drawColor(SK_ColorBLACK);
-
- SkBitmap orig, mask;
- SkImageDecoder::DecodeFile("/skimages/app_icon.png", &orig);
-
- SkMaskFilter* mf = SkBlurMaskFilter::Create(8, SkBlurMaskFilter::kNormal_BlurStyle);
- SkPaint paint;
- paint.setMaskFilter(mf)->unref();
- SkIPoint offset;
- orig.extractAlpha(&mask, &paint, &offset);
-
- paint.setColor(0xFFBB8800);
- paint.setColor(SK_ColorWHITE);
-
- int i;
- canvas->save();
- float gamma = 0.8;
- for (i = 0; i < 5; i++) {
- paint.setMaskFilter(SkTableMaskFilter::CreateGamma(gamma))->unref();
- canvas->drawBitmap(mask, 0, 0, &paint);
- paint.setMaskFilter(NULL);
- canvas->drawBitmap(orig, -offset.fX, -offset.fY, &paint);
- gamma -= 0.1;
- canvas->translate(120, 0);
- }
- canvas->restore();
- canvas->translate(0, 160);
-
- for (i = 0; i < 5; i++) {
- paint.setMaskFilter(SkTableMaskFilter::CreateClip(i*30, 255 - 20))->unref();
- canvas->drawBitmap(mask, 0, 0, &paint);
- paint.setMaskFilter(NULL);
- canvas->drawBitmap(orig, -offset.fX, -offset.fY, &paint);
- canvas->translate(120, 0);
- }
-
-#if 0
- paint.setColor(0xFFFFFFFF);
- canvas->drawBitmap(mask, 0, 0, &paint);
- paint.setMaskFilter(NULL);
- canvas->drawBitmap(orig, -offset.fX, -offset.fY, &paint);
-
- canvas->translate(120, 0);
-
- canvas->drawBitmap(mask, 0, 0, &paint);
- canvas->drawBitmap(mask, 0, 0, &paint);
- canvas->drawBitmap(orig, -offset.fX, -offset.fY, &paint);
-
- canvas->translate(120, 0);
-
- canvas->drawBitmap(mask, 0, 0, &paint);
- canvas->drawBitmap(mask, 0, 0, &paint);
- canvas->drawBitmap(mask, 0, 0, &paint);
- canvas->drawBitmap(orig, -offset.fX, -offset.fY, &paint);
-
- canvas->translate(120, 0);
-
- canvas->drawBitmap(mask, 0, 0, &paint);
- canvas->drawBitmap(mask, 0, 0, &paint);
- canvas->drawBitmap(mask, 0, 0, &paint);
- canvas->drawBitmap(mask, 0, 0, &paint);
- canvas->drawBitmap(orig, -offset.fX, -offset.fY, &paint);
-
- canvas->translate(120, 0);
-
- canvas->drawBitmap(mask, 0, 0, &paint);
- canvas->drawBitmap(mask, 0, 0, &paint);
- canvas->drawBitmap(mask, 0, 0, &paint);
- canvas->drawBitmap(mask, 0, 0, &paint);
- canvas->drawBitmap(mask, 0, 0, &paint);
- canvas->drawBitmap(orig, -offset.fX, -offset.fY, &paint);
-#endif
-}
-
-#include "SkMeshUtils.h"
-
-static SkPoint SkMakePoint(SkScalar x, SkScalar y) {
- SkPoint pt;
- pt.set(x, y);
- return pt;
-}
-
-static SkPoint SkPointInterp(const SkPoint& a, const SkPoint& b, SkScalar t) {
- return SkMakePoint(SkScalarInterp(a.fX, b.fX, t),
- SkScalarInterp(a.fY, b.fY, t));
-}
-
-#include "SkBoundaryPatch.h"
-
-static void set_cubic(SkPoint pts[4], SkScalar x0, SkScalar y0,
- SkScalar x3, SkScalar y3, SkScalar scale = 1) {
- SkPoint tmp, tmp2;
-
- pts[0].set(x0, y0);
- pts[3].set(x3, y3);
-
- tmp = SkPointInterp(pts[0], pts[3], SK_Scalar1/3);
- tmp2 = pts[0] - tmp;
- tmp2.rotateCW();
- tmp2.scale(scale);
- pts[1] = tmp + tmp2;
-
- tmp = SkPointInterp(pts[0], pts[3], 2*SK_Scalar1/3);
- tmp2 = pts[3] - tmp;
- tmp2.rotateCW();
- tmp2.scale(scale);
- pts[2] = tmp + tmp2;
-}
-
-static void test_patch(SkCanvas* canvas, const SkBitmap& bm, SkScalar scale) {
- SkCubicBoundary cubic;
- set_cubic(cubic.fPts + 0, 0, 0, 100, 0, scale);
- set_cubic(cubic.fPts + 3, 100, 0, 100, 100, scale);
- set_cubic(cubic.fPts + 6, 100, 100, 0, 100, -scale);
- set_cubic(cubic.fPts + 9, 0, 100, 0, 0, 0);
-
- SkBoundaryPatch patch;
- patch.setBoundary(&cubic);
-
- const int Rows = 16;
- const int Cols = 16;
- SkPoint pts[Rows * Cols];
- patch.evalPatch(pts, Rows, Cols);
-
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setFilterBitmap(true);
- paint.setStrokeWidth(1);
- paint.setStrokeCap(SkPaint::kRound_Cap);
-
- canvas->translate(50, 50);
- canvas->scale(3, 3);
-
- SkMeshUtils::Draw(canvas, bm, Rows, Cols, pts, NULL, paint);
-}
-
-static void test_drag(SkCanvas* canvas, const SkBitmap& bm,
- const SkPoint& p0, const SkPoint& p1) {
- SkCubicBoundary cubic;
- set_cubic(cubic.fPts + 0, 0, 0, 100, 0, 0);
- set_cubic(cubic.fPts + 3, 100, 0, 100, 100, 0);
- set_cubic(cubic.fPts + 6, 100, 100, 0, 100, 0);
- set_cubic(cubic.fPts + 9, 0, 100, 0, 0, 0);
-
-#if 0
- cubic.fPts[1] += p1 - p0;
- cubic.fPts[2] += p1 - p0;
-#else
- SkScalar dx = p1.fX - p0.fX;
- if (dx > 0) dx = 0;
- SkScalar dy = p1.fY - p0.fY;
- if (dy > 0) dy = 0;
-
- cubic.fPts[1].fY += dy;
- cubic.fPts[2].fY += dy;
- cubic.fPts[10].fX += dx;
- cubic.fPts[11].fX += dx;
-#endif
-
- SkBoundaryPatch patch;
- patch.setBoundary(&cubic);
-
- const int Rows = 16;
- const int Cols = 16;
- SkPoint pts[Rows * Cols];
- patch.evalPatch(pts, Rows, Cols);
-
- SkPaint paint;
- paint.setAntiAlias(true);
- paint.setFilterBitmap(true);
- paint.setStrokeWidth(1);
- paint.setStrokeCap(SkPaint::kRound_Cap);
-
- canvas->translate(50, 50);
- canvas->scale(3, 3);
-
- SkAutoCanvasRestore acr(canvas, true);
-
- SkRect r = { 0, 0, 100, 100 };
- canvas->clipRect(r);
- SkMeshUtils::Draw(canvas, bm, Rows, Cols, pts, NULL, paint);
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-class Mesh {
-public:
- Mesh();
- ~Mesh();
-
- Mesh& operator=(const Mesh& src);
-
- void init(const SkRect& bounds, int rows, int cols,
- const SkRect& texture);
-
- const SkRect& bounds() const { return fBounds; }
-
- int rows() const { return fRows; }
- int cols() const { return fCols; }
- SkPoint& pt(int row, int col) {
- return fPts[row * (fRows + 1) + col];
- }
-
- void draw(SkCanvas*, const SkPaint&);
- void drawWireframe(SkCanvas* canvas, const SkPaint& paint);
-
-private:
- SkRect fBounds;
- int fRows, fCols;
- SkPoint* fPts;
- SkPoint* fTex; // just points into fPts, not separately allocated
- int fCount;
- uint16_t* fIndices;
- int fIndexCount;
-};
-
-Mesh::Mesh() : fPts(NULL), fCount(0), fIndices(NULL), fIndexCount(0) {}
-
-Mesh::~Mesh() {
- delete[] fPts;
- delete[] fIndices;
-}
-
-Mesh& Mesh::operator=(const Mesh& src) {
- delete[] fPts;
- delete[] fIndices;
-
- fBounds = src.fBounds;
- fRows = src.fRows;
- fCols = src.fCols;
-
- fCount = src.fCount;
- fPts = new SkPoint[fCount * 2];
- fTex = fPts + fCount;
- memcpy(fPts, src.fPts, fCount * 2 * sizeof(SkPoint));
-
- delete[] fIndices;
- fIndexCount = src.fIndexCount;
- fIndices = new uint16_t[fIndexCount];
- memcpy(fIndices, src.fIndices, fIndexCount * sizeof(uint16_t));
-
- return *this;
-}
-
-void Mesh::init(const SkRect& bounds, int rows, int cols,
- const SkRect& texture) {
- SkASSERT(rows > 0 && cols > 0);
-
- fBounds = bounds;
- fRows = rows;
- fCols = cols;
-
- delete[] fPts;
- fCount = (rows + 1) * (cols + 1);
- fPts = new SkPoint[fCount * 2];
- fTex = fPts + fCount;
-
- delete[] fIndices;
- fIndexCount = rows * cols * 6;
- fIndices = new uint16_t[fIndexCount];
-
- SkPoint* pts = fPts;
- const SkScalar dx = bounds.width() / rows;
- const SkScalar dy = bounds.height() / cols;
- SkPoint* tex = fTex;
- const SkScalar dtx = texture.width() / rows;
- const SkScalar dty = texture.height() / cols;
- uint16_t* idx = fIndices;
- int index = 0;
- for (int y = 0; y <= cols; y++) {
- for (int x = 0; x <= rows; x++) {
- pts->set(bounds.fLeft + x*dx, bounds.fTop + y*dy);
- pts += 1;
- tex->set(texture.fLeft + x*dtx, texture.fTop + y*dty);
- tex += 1;
-
- if (y < cols && x < rows) {
- *idx++ = index;
- *idx++ = index + rows + 1;
- *idx++ = index + 1;
-
- *idx++ = index + 1;
- *idx++ = index + rows + 1;
- *idx++ = index + rows + 2;
-
- index += 1;
- }
- }
- index += 1;
- }
-}
-
-void Mesh::draw(SkCanvas* canvas, const SkPaint& paint) {
- canvas->drawVertices(SkCanvas::kTriangles_VertexMode, fCount,
- fPts, fTex, NULL, NULL, fIndices, fIndexCount,
- paint);
-}
-
-void Mesh::drawWireframe(SkCanvas* canvas, const SkPaint& paint) {
- canvas->drawVertices(SkCanvas::kTriangles_VertexMode, fCount,
- fPts, NULL, NULL, NULL, fIndices, fIndexCount,
- paint);
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-class WarpView : public SkView {
- Mesh fMesh, fOrig;
- SkBitmap fBitmap;
- SkMatrix fMatrix, fInverse;
-public:
- WarpView() {
- SkBitmap bm;
-// SkImageDecoder::DecodeFile("/skimages/marker.png", &bm);
- SkImageDecoder::DecodeFile("/skimages/logo.gif", &bm);
- // SkImageDecoder::DecodeFile("/beach_shot.JPG", &bm);
- fBitmap = bm;
-
- SkRect bounds, texture;
- texture.set(0, 0, SkIntToScalar(fBitmap.width()),
- SkIntToScalar(fBitmap.height()));
- bounds = texture;
-
-// fMesh.init(bounds, fBitmap.width() / 40, fBitmap.height() / 40, 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:
- // overrides from SkEventSink
- virtual bool onQuery(SkEvent* evt) {
- if (SampleCode::TitleQ(*evt)) {
- SampleCode::TitleR(evt, "Warp");
- return true;
- }
- 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 = 10 + dragLength/4;
- 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;
- }
-
- virtual void onDraw(SkCanvas* canvas) {
- 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); //return;
-
- paint.setShader(NULL);
- paint.setColor(SK_ColorRED);
- fMesh.draw(canvas, paint);
-
- // test_drag(canvas, fBitmap, fP0, fP1);
- }
-
- virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
- return new Click(this);
- }
-
- virtual bool onClick(Click* click) {
- SkPoint pts[2] = { click->fOrig, click->fCurr };
- fInverse.mapPoints(pts, 2);
- this->warp(pts[0], pts[1]);
- this->inval(NULL);
- return true;
- }
-
-private:
- SkIRect fBase, fRect;
- SkPoint fP0, fP1;
- typedef SkView INHERITED;
-};
-
-//////////////////////////////////////////////////////////////////////////////
-
-static SkView* MyFactory() { return new WarpView; }
-static SkViewRegister reg(MyFactory);
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