add unittest for SkTreatAsSprite
Review URL: https://codereview.appspot.com/7042044
git-svn-id: http://skia.googlecode.com/svn/trunk@6974 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/DrawBitmapRectTest.cpp b/tests/DrawBitmapRectTest.cpp
index 7dc51c0..0a8d730 100644
--- a/tests/DrawBitmapRectTest.cpp
+++ b/tests/DrawBitmapRectTest.cpp
@@ -9,6 +9,90 @@
#include "SkBitmap.h"
#include "SkCanvas.h"
#include "SkShader.h"
+#include "SkRandom.h"
+#include "SkMatrixUtils.h"
+
+static void rand_matrix(SkMatrix* mat, SkRandom& rand, unsigned mask) {
+ mat->setIdentity();
+ if (mask & SkMatrix::kTranslate_Mask) {
+ mat->postTranslate(rand.nextSScalar1(), rand.nextSScalar1());
+ }
+ if (mask & SkMatrix::kScale_Mask) {
+ mat->postScale(rand.nextSScalar1(), rand.nextSScalar1());
+ }
+ if (mask & SkMatrix::kAffine_Mask) {
+ mat->postRotate(rand.nextSScalar1() * 360);
+ }
+ if (mask & SkMatrix::kPerspective_Mask) {
+ mat->setPerspX(rand.nextSScalar1());
+ mat->setPerspY(rand.nextSScalar1());
+ }
+}
+
+static void rand_rect(SkRect* r, SkRandom& rand) {
+ r->set(rand.nextSScalar1() * 1000, rand.nextSScalar1() * 1000,
+ rand.nextSScalar1() * 1000, rand.nextSScalar1() * 1000);
+ r->sort();
+}
+
+static void test_treatAsSprite(skiatest::Reporter* reporter) {
+ const unsigned bilerBits = kSkSubPixelBitsForBilerp;
+
+ SkMatrix mat;
+ SkRect r;
+ SkRandom rand;
+
+ // assert: translate-only no-filter can always be treated as sprite
+ for (int i = 0; i < 1000; ++i) {
+ rand_matrix(&mat, rand, SkMatrix::kTranslate_Mask);
+ for (int j = 0; j < 1000; ++j) {
+ rand_rect(&r, rand);
+ REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, r, 0));
+ }
+ }
+
+ // assert: rotate/perspect is never treated as sprite
+ for (int i = 0; i < 1000; ++i) {
+ rand_matrix(&mat, rand, SkMatrix::kAffine_Mask | SkMatrix::kPerspective_Mask);
+ for (int j = 0; j < 1000; ++j) {
+ rand_rect(&r, rand);
+ REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, r, 0));
+ REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, r, bilerBits));
+ }
+ }
+
+ r.set(10, 10, 500, 600);
+
+ const SkScalar tooMuchSubpixel = SkFloatToScalar(100.1f);
+ mat.setTranslate(tooMuchSubpixel, 0);
+ REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, r, bilerBits));
+ mat.setTranslate(0, tooMuchSubpixel);
+ REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, r, bilerBits));
+
+ const SkScalar tinySubPixel = SkFloatToScalar(100.02f);
+ mat.setTranslate(tinySubPixel, 0);
+ REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, r, bilerBits));
+ mat.setTranslate(0, tinySubPixel);
+ REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, r, bilerBits));
+
+ const SkScalar twoThirds = SK_Scalar1 * 2 / 3;
+ const SkScalar bigScale = SkScalarDiv(r.width() + twoThirds, r.width());
+ mat.setScale(bigScale, bigScale);
+ REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, r, false));
+ REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, r, bilerBits));
+
+ const SkScalar oneThird = SK_Scalar1 / 3;
+ const SkScalar smallScale = SkScalarDiv(r.width() + oneThird, r.width());
+ mat.setScale(smallScale, smallScale);
+ REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, r, false));
+ REPORTER_ASSERT(reporter, !SkTreatAsSprite(mat, r, bilerBits));
+
+ const SkScalar oneFortyth = SK_Scalar1 / 40;
+ const SkScalar tinyScale = SkScalarDiv(r.width() + oneFortyth, r.width());
+ mat.setScale(tinyScale, tinyScale);
+ REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, r, false));
+ REPORTER_ASSERT(reporter, SkTreatAsSprite(mat, r, bilerBits));
+}
static void assert_ifDrawnTo(skiatest::Reporter* reporter,
const SkBitmap& bm, bool shouldBeDrawn) {
@@ -179,6 +263,8 @@
test_nan_antihair(reporter);
test_giantrepeat_crbug118018(reporter);
+
+ test_treatAsSprite(reporter);
}
#include "TestClassDef.h"