void gradCheck(skiatest::Reporter* reporter, SkShader* shader, SkShader::GradientInfo* info, SkShader::GradientType gt) const { SkAutoTMalloc<SkColor> colorStorage(fColorCount); SkAutoTMalloc<SkScalar> posStorage(fColorCount); info->fColorCount = fColorCount; info->fColors = colorStorage; info->fColorOffsets = posStorage.get(); REPORTER_ASSERT(reporter, shader->asAGradient(info) == gt); REPORTER_ASSERT(reporter, info->fColorCount == fColorCount); REPORTER_ASSERT(reporter, !memcmp(info->fColors, fColors, fColorCount * sizeof(SkColor))); REPORTER_ASSERT(reporter, !memcmp(info->fColorOffsets, fPos, fColorCount * sizeof(SkScalar))); REPORTER_ASSERT(reporter, fTileMode == info->fTileMode); }
void Patch::draw(SkCanvas* canvas, const SkPaint& paint, int nu, int nv, bool doTextures, bool doColors) { if (nu < 1 || nv < 1) { return; } int i, npts = (nu + nv) * 2; SkAutoSTMalloc<16, SkPoint> storage(npts + 1); SkPoint* edge0 = storage.get(); SkPoint* edge1 = edge0 + nu; SkPoint* edge2 = edge1 + nv; SkPoint* edge3 = edge2 + nu; // evaluate the edge points eval_patch_edge(fPts + 0, edge0, nu); eval_patch_edge(fPts + 3, edge1, nv); eval_patch_edge(fPts + 6, edge2, nu); eval_patch_edge(fPts + 9, edge3, nv); edge3[nv] = edge0[0]; // the last shall be first for (i = 0; i < npts; i++) { // canvas->drawLine(edge0[i].fX, edge0[i].fY, edge0[i+1].fX, edge0[i+1].fY, paint); } int row, vertCount = (nu + 1) * (nv + 1); SkAutoTMalloc<SkPoint> vertStorage(vertCount); SkPoint* verts = vertStorage.get(); // first row memcpy(verts, edge0, (nu + 1) * sizeof(SkPoint)); // rows SkPoint* r = verts; for (row = 1; row < nv; row++) { r += nu + 1; r[0] = edge3[nv - row]; for (int col = 1; col < nu; col++) { eval_sheet(edge0, nu, nv, col, row, &r[col]); } r[nu] = edge1[row]; } // last row SkPoint* last = verts + nv * (nu + 1); for (i = 0; i <= nu; i++) { last[i] = edge2[nu - i]; } // canvas->drawPoints(verts, vertCount, paint); int stripCount = (nu + 1) * 2; SkAutoTMalloc<SkPoint> stripStorage(stripCount * 2); SkAutoTMalloc<SkColor> colorStorage(stripCount); SkPoint* strip = stripStorage.get(); SkPoint* tex = strip + stripCount; SkColor* colors = colorStorage.get(); SkScalar t = 0; const SkScalar ds = SK_Scalar1 * fW / nu; const SkScalar dt = SK_Scalar1 * fH / nv; r = verts; for (row = 0; row < nv; row++) { SkPoint* upper = r; SkPoint* lower = r + nu + 1; r = lower; SkScalar s = 0; for (i = 0; i <= nu; i++) { strip[i*2 + 0] = *upper++; strip[i*2 + 1] = *lower++; tex[i*2 + 0].set(s, t); tex[i*2 + 1].set(s, t + dt); colors[i*2 + 0] = make_color(s/fW, t/fH); colors[i*2 + 1] = make_color(s/fW, (t + dt)/fH); s += ds; } t += dt; canvas->drawVertices(SkCanvas::kTriangleStrip_VertexMode, stripCount, strip, doTextures ? tex : nullptr, doColors ? colors : nullptr, nullptr, nullptr, 0, paint); } }