4  * Use of this source code is governed by a BSD-style license that can be
35     size->set(bm.width(), bm.height());  in make_shader0()
80 static void eval_sheet(const SkPoint edge[], int nu, int nv, int iu, int iv,  in eval_sheet()  argument
84     const int BR = TR + nv;  in eval_sheet()
88     SkScalar v = SkIntToScalar(iv) / nv;  in eval_sheet()
91     SkScalar Uv = (1 - u) * v;  in eval_sheet()
92     SkScalar uV = u * (1 - v);  in eval_sheet()
93     SkScalar UV = (1 - u) * (1 - v);  in eval_sheet()
98     SkScalar x = (1 - v) * edge[TL+iu].fX + u * edge[TR+iv].fX +  in eval_sheet()
99                  v * edge[BR+nu-iu].fX + (1 - u) * edge[BL+nv-iv].fX - x0;  in eval_sheet()
100     SkScalar y = (1 - v) * edge[TL+iu].fY + u * edge[TR+iv].fY +  in eval_sheet()
101                  v * edge[BR+nu-iu].fY + (1 - u) * edge[BL+nv-iv].fY - y0;  in eval_sheet()
102     pt->set(x, y);  in eval_sheet()
109 void Patch::draw(SkCanvas* canvas, const SkPaint& paint, int nu, int nv,  in draw()  argument
111     if (nu < 1 || nv < 1) {  in draw()
115     int i, npts = (nu + nv) * 2;  in draw()
119     SkPoint* edge2 = edge1 + nv;  in draw()
124     eval_patch_edge(fPts + 3, edge1, nv);  in draw()
126     eval_patch_edge(fPts + 9, edge3, nv);  in draw()
127     edge3[nv] = edge0[0];   // the last shall be first  in draw()
130 //        canvas->drawLine(edge0[i].fX, edge0[i].fY, edge0[i+1].fX, edge0[i+1].fY, paint);  in draw()
133     int row, vertCount = (nu + 1) * (nv + 1);  in draw()
141     for (row = 1; row < nv; row++) {  in draw()
143         r[0] = edge3[nv - row];  in draw()
145             eval_sheet(edge0, nu, nv, col, row, &r[col]);  in draw()
150     SkPoint* last = verts + nv * (nu + 1);  in draw()
152         last[i] = edge2[nu - i];  in draw()
155 //    canvas->drawPoints(verts, vertCount, paint);  in draw()
165     const SkScalar dt = SK_Scalar1 * fH / nv;  in draw()
167     for (row = 0; row < nv; row++) {  in draw()
182         canvas->drawVertices(SkVertices::MakeCopy(SkVertices::kTriangleStrip_VertexMode, stripCount,  in draw()
189 static void drawpatches(SkCanvas* canvas, const SkPaint& paint, int nu, int nv,  in drawpatches()  argument
193     patch->draw(canvas, paint, nu, nv, false, false);  in drawpatches()
194     canvas->translate(SkIntToScalar(180), 0);  in drawpatches()
195     patch->draw(canvas, paint, nu, nv, true, false);  in drawpatches()
196     canvas->translate(SkIntToScalar(180), 0);  in drawpatches()
197     patch->draw(canvas, paint, nu, nv, false, true);  in drawpatches()
198     canvas->translate(SkIntToScalar(180), 0);  in drawpatches()
199     patch->draw(canvas, paint, nu, nv, true, true);  in drawpatches()
236         this->setBGColor(SK_ColorGRAY);  in PatchView()
245         return this->INHERITED::onQuery(evt);  in onQuery()
250         const int nv = 10;  in onDrawContent()  local
256         canvas->translate(DX, DY);  in onDrawContent()
270         drawpatches(canvas, paint, nu, nv, &patch);  in onDrawContent()
275         canvas->drawPoints(SkCanvas::kPoints_PointMode, SK_ARRAY_COUNT(fPts), fPts, paint);  in onDrawContent()
277         canvas->translate(0, SkIntToScalar(300));  in onDrawContent()
284             paint.setShader(paint.getShader()->makeWithLocalMatrix(m));  in onDrawContent()
289             paint.setShader(paint.getShader()->makeWithLocalMatrix(m));  in onDrawContent()
292         drawpatches(canvas, paint, nu, nv, &patch);  in onDrawContent()
307         return SkPoint::Length(pt.fX - x, pt.fY - y) < SkIntToScalar(5);  in hittest()
311         x -= DX;  in onFindClickHandler()
312         y -= DY;  in onFindClickHandler()
318         return this->INHERITED::onFindClickHandler(x, y, modi);  in onFindClickHandler()
322         fPts[((PtClick*)click)->fIndex].set(click->fCurr.fX - DX, click->fCurr.fY - DY);  in onClick()