diff options
author | fmalita <fmalita@chromium.org> | 2015-07-22 05:56:16 -0700 |
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committer | Commit bot <commit-bot@chromium.org> | 2015-07-22 05:56:16 -0700 |
commit | 8c0144ccb17220db9d5140ef5ee85d5bc7837513 (patch) | |
tree | 51de043ec31a55d3875d90673188c47ddfa44a21 /tests | |
parent | 71f5db892ee7ed9fbb573da28ccb906e18ba24a4 (diff) |
Fix SkCanvas::wouldOverwriteEntireSurface() contains test
R=reed@google.com,robertphillips@google.com,bsalomon@google.com
Review URL: https://codereview.chromium.org/1244093005
Diffstat (limited to 'tests')
-rw-r--r-- | tests/ImageTest.cpp | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/tests/ImageTest.cpp b/tests/ImageTest.cpp index eb8f7615a9..d93815ba9c 100644 --- a/tests/ImageTest.cpp +++ b/tests/ImageTest.cpp @@ -130,3 +130,38 @@ DEF_TEST(Image_NewRasterCopy, reporter) { REPORTER_ASSERT(reporter, blue == pixels[2]); REPORTER_ASSERT(reporter, 0 == pixels[3]); } + +// Test that a draw that only partially covers the drawing surface isn't +// interpreted as covering the entire drawing surface (i.e., exercise one of the +// conditions of SkCanvas::wouldOverwriteEntireSurface()). +DEF_TEST(Image_RetainSnapshot, reporter) { + const SkPMColor red = SkPackARGB32(0xFF, 0xFF, 0, 0); + const SkPMColor green = SkPackARGB32(0xFF, 0, 0xFF, 0); + SkImageInfo info = SkImageInfo::MakeN32Premul(2, 2); + SkAutoTUnref<SkSurface> surface(SkSurface::NewRaster(info)); + surface->getCanvas()->clear(0xFF00FF00); + + SkPMColor pixels[4]; + memset(pixels, 0xFF, sizeof(pixels)); // init with values we don't expect + const SkImageInfo dstInfo = SkImageInfo::MakeN32Premul(2, 2); + const size_t dstRowBytes = 2 * sizeof(SkPMColor); + + SkAutoTUnref<SkImage> image1(surface->newImageSnapshot()); + REPORTER_ASSERT(reporter, image1->readPixels(dstInfo, pixels, dstRowBytes, 0, 0)); + for (size_t i = 0; i < SK_ARRAY_COUNT(pixels); ++i) { + REPORTER_ASSERT(reporter, pixels[i] == green); + } + + SkPaint paint; + paint.setXfermodeMode(SkXfermode::kSrc_Mode); + paint.setColor(SK_ColorRED); + + surface->getCanvas()->drawRect(SkRect::MakeXYWH(1, 1, 1, 1), paint); + + SkAutoTUnref<SkImage> image2(surface->newImageSnapshot()); + REPORTER_ASSERT(reporter, image2->readPixels(dstInfo, pixels, dstRowBytes, 0, 0)); + REPORTER_ASSERT(reporter, pixels[0] == green); + REPORTER_ASSERT(reporter, pixels[1] == green); + REPORTER_ASSERT(reporter, pixels[2] == green); + REPORTER_ASSERT(reporter, pixels[3] == red); +} |