Add a GM to test ovals with a variety of paint settings, matrices and sizes.
Review URL: https://codereview.chromium.org/14329008/
git-svn-id: http://skia.googlecode.com/svn/trunk@8737 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/ovals.cpp b/gm/ovals.cpp
new file mode 100755
index 0000000..d0c2165
--- /dev/null
+++ b/gm/ovals.cpp
@@ -0,0 +1,284 @@
+
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "gm.h"
+#include "SkTArray.h"
+#include "SkRandom.h"
+#include "SkMatrix.h"
+#include "SkBlurMaskFilter.h"
+#include "SkGradientShader.h"
+#include "SkBlurDrawLooper.h"
+#include "SkRect.h"
+
+namespace skiagm {
+
+class OvalGM : public GM {
+public:
+ OvalGM() {
+ this->setBGColor(0xFF000000);
+ this->makePaints();
+ this->makeMatrices();
+ }
+
+protected:
+ virtual SkString onShortName() SK_OVERRIDE {
+ return SkString("ovals");
+ }
+
+ virtual SkISize onISize() SK_OVERRIDE {
+ return make_isize(1200, 900);
+ }
+
+ void makePaints() {
+ {
+ // no AA
+ SkPaint p;
+ fPaints.push_back(p);
+ }
+
+ {
+ // AA
+ SkPaint p;
+ p.setAntiAlias(true);
+ fPaints.push_back(p);
+ }
+
+ {
+ // AA with stroke style
+ SkPaint p;
+ p.setAntiAlias(true);
+ p.setStyle(SkPaint::kStroke_Style);
+ p.setStrokeWidth(SkIntToScalar(5));
+ fPaints.push_back(p);
+ }
+
+ {
+ // AA with stroke style, width = 0
+ SkPaint p;
+ p.setAntiAlias(true);
+ p.setStyle(SkPaint::kStroke_Style);
+ fPaints.push_back(p);
+ }
+
+ {
+ // AA with stroke and fill style
+ SkPaint p;
+ p.setAntiAlias(true);
+ p.setStyle(SkPaint::kStrokeAndFill_Style);
+ p.setStrokeWidth(SkIntToScalar(3));
+ fPaints.push_back(p);
+ }
+ }
+
+ void makeMatrices() {
+ {
+ SkMatrix m;
+ m.setIdentity();
+ fMatrices.push_back(m);
+ }
+
+ {
+ SkMatrix m;
+ m.setScale(SkIntToScalar(3), SkIntToScalar(2));
+ fMatrices.push_back(m);
+ }
+
+ {
+ SkMatrix m;
+ m.setScale(SkIntToScalar(2), SkIntToScalar(2));
+ fMatrices.push_back(m);
+ }
+
+ {
+ SkMatrix m;
+ m.setScale(SkIntToScalar(1), SkIntToScalar(2));
+ fMatrices.push_back(m);
+ }
+
+ {
+ SkMatrix m;
+ m.setScale(SkIntToScalar(4), SkIntToScalar(1));
+ fMatrices.push_back(m);
+ }
+
+ {
+ SkMatrix m;
+ m.setRotate(SkIntToScalar(90));
+ fMatrices.push_back(m);
+ }
+
+ {
+ SkMatrix m;
+ m.setSkew(SkIntToScalar(2), SkIntToScalar(3));
+ fMatrices.push_back(m);
+ }
+
+ {
+ SkMatrix m;
+ m.setRotate(SkIntToScalar(60));
+ fMatrices.push_back(m);
+ }
+ }
+
+ SkColor genColor(SkMWCRandom* rand) {
+ SkScalar hsv[3];
+ hsv[0] = SkFloatToScalar(rand->nextRangeF(0.0f, 360.0f));
+ hsv[1] = SkFloatToScalar(rand->nextRangeF(0.75f, 1.0f));
+ hsv[2] = SkFloatToScalar(rand->nextRangeF(0.75f, 1.0f));
+
+ return SkHSVToColor(hsv);
+ }
+
+ virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+ SkMWCRandom rand(1);
+ canvas->translate(20 * SK_Scalar1, 20 * SK_Scalar1);
+ SkRect oval = SkRect::MakeLTRB(-20, -30, 20, 30);
+
+ const SkScalar kXStart = 60.0f;
+ const SkScalar kYStart = 80.0f;
+ const int kXStep = 150;
+ const int kYStep = 160;
+ int maxX = fMatrices.count();
+
+ SkPaint rectPaint;
+ rectPaint.setAntiAlias(true);
+ rectPaint.setStyle(SkPaint::kStroke_Style);
+ rectPaint.setStrokeWidth(SkIntToScalar(0));
+ rectPaint.setColor(SK_ColorLTGRAY);
+
+ int testCount = 0;
+ for (int i = 0; i < fPaints.count(); ++i) {
+ for (int j = 0; j < fMatrices.count(); ++j) {
+ canvas->save();
+ SkMatrix mat = fMatrices[j];
+ // position the oval, and make it at off-integer coords.
+ mat.postTranslate(kXStart + SK_Scalar1 * kXStep * (testCount % maxX) +
+ SK_Scalar1 / 4,
+ kYStart + SK_Scalar1 * kYStep * (testCount / maxX) +
+ 3 * SK_Scalar1 / 4);
+ canvas->concat(mat);
+
+ SkColor color = genColor(&rand);
+ fPaints[i].setColor(color);
+
+ canvas->drawRect(oval, rectPaint);
+ canvas->drawOval(oval, fPaints[i]);
+
+ canvas->restore();
+
+ ++testCount;
+ }
+ }
+
+ // special cases
+
+ // non-scaled tall and skinny oval
+ for (int i = 0; i < fPaints.count(); ++i) {
+ SkRect oval = SkRect::MakeLTRB(-20, -60, 20, 60);
+ canvas->save();
+ // position the oval, and make it at off-integer coords.
+ canvas->translate(kXStart + SK_Scalar1 * kXStep * 2.55f + SK_Scalar1 / 4,
+ kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4);
+
+ SkColor color = genColor(&rand);
+ fPaints[i].setColor(color);
+
+ canvas->drawRect(oval, rectPaint);
+ canvas->drawOval(oval, fPaints[i]);
+ canvas->restore();
+ }
+
+ // non-scaled wide and short oval
+ for (int i = 0; i < fPaints.count(); ++i) {
+ SkRect oval = SkRect::MakeLTRB(-80, -30, 80, 30);
+ canvas->save();
+ // position the oval, and make it at off-integer coords.
+ canvas->translate(kXStart + SK_Scalar1 * kXStep * 4 + SK_Scalar1 / 4,
+ kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4 +
+ SK_ScalarHalf * kYStep);
+
+ SkColor color = genColor(&rand);
+ fPaints[i].setColor(color);
+
+ canvas->drawRect(oval, rectPaint);
+ canvas->drawOval(oval, fPaints[i]);
+ canvas->restore();
+ }
+
+ // super skinny oval
+ for (int i = 0; i < fPaints.count(); ++i) {
+ SkRect oval = SkRect::MakeLTRB(0, -60, 1, 60);
+ canvas->save();
+ // position the oval, and make it at off-integer coords.
+ canvas->translate(kXStart + SK_Scalar1 * kXStep * 3.25f + SK_Scalar1 / 4,
+ kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4);
+
+ SkColor color = genColor(&rand);
+ fPaints[i].setColor(color);
+
+ canvas->drawOval(oval, fPaints[i]);
+ canvas->restore();
+ }
+
+ // super short oval
+ for (int i = 0; i < fPaints.count(); ++i) {
+ SkRect oval = SkRect::MakeLTRB(-80, -1, 80, 0);
+ canvas->save();
+ // position the oval, and make it at off-integer coords.
+ canvas->translate(kXStart + SK_Scalar1 * kXStep * 2.5f + SK_Scalar1 / 4,
+ kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4 +
+ SK_ScalarHalf * kYStep);
+
+ SkColor color = genColor(&rand);
+ fPaints[i].setColor(color);
+
+ canvas->drawOval(oval, fPaints[i]);
+ canvas->restore();
+ }
+
+ // radial gradient
+ SkPoint center = SkPoint::Make(SkIntToScalar(0), SkIntToScalar(0));
+ SkColor colors[] = { SK_ColorBLUE, SK_ColorRED, SK_ColorGREEN };
+ SkScalar pos[] = { 0, SK_ScalarHalf, SK_Scalar1 };
+ SkAutoTUnref<SkShader> shader(SkGradientShader::CreateRadial(center,
+ SkIntToScalar(20),
+ colors,
+ pos,
+ SK_ARRAY_COUNT(colors),
+ SkShader::kClamp_TileMode));
+
+ for (int i = 0; i < fPaints.count(); ++i) {
+ canvas->save();
+ // position the path, and make it at off-integer coords.
+ canvas->translate(kXStart + SK_Scalar1 * kXStep * 0 + SK_Scalar1 / 4,
+ kYStart + SK_Scalar1 * kYStep * i + 3 * SK_Scalar1 / 4 +
+ SK_ScalarHalf * kYStep);
+
+ SkColor color = genColor(&rand);
+ fPaints[i].setColor(color);
+ fPaints[i].setShader(shader);
+
+ canvas->drawRect(oval, rectPaint);
+ canvas->drawOval(oval, fPaints[i]);
+ canvas->restore();
+ }
+ }
+
+private:
+ SkTArray<SkPaint> fPaints;
+ SkTArray<SkMatrix> fMatrices;
+
+ typedef GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static GM* MyFactory(void*) { return new OvalGM; }
+static GMRegistry reg(MyFactory);
+
+}