Add SkPDFUtils.cpp to build.
git-svn-id: http://skia.googlecode.com/svn/trunk@893 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/pdf/SkPDFUtils.cpp b/src/pdf/SkPDFUtils.cpp
new file mode 100644
index 0000000..874ee8f
--- /dev/null
+++ b/src/pdf/SkPDFUtils.cpp
@@ -0,0 +1,160 @@
+/*
+ * Copyright (C) 2011 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "SkPaint.h"
+#include "SkPath.h"
+#include "SkPDFUtils.h"
+#include "SkString.h"
+#include "SkPDFTypes.h"
+
+// static
+SkPDFArray* SkPDFUtils::MatrixToArray(const SkMatrix& matrix) {
+ SkScalar values[6];
+ SkAssertResult(matrix.pdfTransform(values));
+
+ SkPDFArray* result = new SkPDFArray;
+ result->reserve(6);
+ for (size_t i = 0; i < SK_ARRAY_COUNT(values); i++) {
+ result->append(new SkPDFScalar(values[i]))->unref();
+ }
+ return result;
+}
+
+// static
+void SkPDFUtils::MoveTo(SkScalar x, SkScalar y, SkString* content) {
+ SkPDFScalar::Append(x, content);
+ content->append(" ");
+ SkPDFScalar::Append(y, content);
+ content->append(" m\n");
+}
+
+// static
+void SkPDFUtils::AppendLine(SkScalar x, SkScalar y, SkString* content) {
+ SkPDFScalar::Append(x, content);
+ content->append(" ");
+ SkPDFScalar::Append(y, content);
+ content->append(" l\n");
+}
+
+// static
+void SkPDFUtils::AppendCubic(SkScalar ctl1X, SkScalar ctl1Y,
+ SkScalar ctl2X, SkScalar ctl2Y,
+ SkScalar dstX, SkScalar dstY, SkString* content) {
+ SkString cmd("y\n");
+ SkPDFScalar::Append(ctl1X, content);
+ content->append(" ");
+ SkPDFScalar::Append(ctl1Y, content);
+ content->append(" ");
+ if (ctl2X != dstX || ctl2Y != dstY) {
+ cmd.set("c\n");
+ SkPDFScalar::Append(ctl2X, content);
+ content->append(" ");
+ SkPDFScalar::Append(ctl2Y, content);
+ content->append(" ");
+ }
+ SkPDFScalar::Append(dstX, content);
+ content->append(" ");
+ SkPDFScalar::Append(dstY, content);
+ content->append(" ");
+ content->append(cmd);
+}
+
+// static
+void SkPDFUtils::AppendRectangle(SkScalar x, SkScalar y,
+ SkScalar w, SkScalar h, SkString* content) {
+ SkPDFScalar::Append(x, content);
+ content->append(" ");
+ SkPDFScalar::Append(y, content);
+ content->append(" ");
+ SkPDFScalar::Append(w, content);
+ content->append(" ");
+ SkPDFScalar::Append(h, content);
+ content->append(" re\n");
+}
+
+// static
+void SkPDFUtils::EmitPath(const SkPath& path, SkString* content) {
+ SkPoint args[4];
+ SkPath::Iter iter(path, false);
+ for (SkPath::Verb verb = iter.next(args);
+ verb != SkPath::kDone_Verb;
+ verb = iter.next(args)) {
+ // args gets all the points, even the implicit first point.
+ switch (verb) {
+ case SkPath::kMove_Verb:
+ MoveTo(args[0].fX, args[0].fY, content);
+ break;
+ case SkPath::kLine_Verb:
+ AppendLine(args[1].fX, args[1].fY, content);
+ break;
+ case SkPath::kQuad_Verb: {
+ // Convert quad to cubic (degree elevation). http://goo.gl/vS4i
+ const SkScalar three = SkIntToScalar(3);
+ args[1].scale(SkIntToScalar(2));
+ SkScalar ctl1X = SkScalarDiv(args[0].fX + args[1].fX, three);
+ SkScalar ctl1Y = SkScalarDiv(args[0].fY + args[1].fY, three);
+ SkScalar ctl2X = SkScalarDiv(args[2].fX + args[1].fX, three);
+ SkScalar ctl2Y = SkScalarDiv(args[2].fY + args[1].fY, three);
+ AppendCubic(ctl1X, ctl1Y, ctl2X, ctl2Y, args[2].fX, args[2].fY,
+ content);
+ break;
+ }
+ case SkPath::kCubic_Verb:
+ AppendCubic(args[1].fX, args[1].fY, args[2].fX, args[2].fY,
+ args[3].fX, args[3].fY, content);
+ break;
+ case SkPath::kClose_Verb:
+ ClosePath(content);
+ break;
+ case SkPath::kDone_Verb:
+ break;
+ default:
+ SkASSERT(false);
+ break;
+ }
+ }
+}
+
+// static
+void SkPDFUtils::ClosePath(SkString* content) {
+ content->append("h\n");
+}
+
+// static
+void SkPDFUtils::PaintPath(SkPaint::Style style, SkPath::FillType fill,
+ SkString* content) {
+ if (style == SkPaint::kFill_Style)
+ content->append("f");
+ else if (style == SkPaint::kStrokeAndFill_Style)
+ content->append("B");
+ else if (style == SkPaint::kStroke_Style)
+ content->append("S");
+
+ if (style != SkPaint::kStroke_Style) {
+ // Not supported yet.
+ NOT_IMPLEMENTED(fill == SkPath::kInverseEvenOdd_FillType, false);
+ NOT_IMPLEMENTED(fill == SkPath::kInverseWinding_FillType, false);
+ if (fill == SkPath::kEvenOdd_FillType)
+ content->append("*");
+ }
+ content->append("\n");
+}
+
+// static
+void SkPDFUtils::StrokePath(SkString* content) {
+ SkPDFUtils::PaintPath(
+ SkPaint::kStroke_Style, SkPath::kWinding_FillType, content);
+}