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author | reed@google.com <reed@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2011-03-17 17:48:04 +0000 |
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committer | reed@google.com <reed@google.com@2bbb7eff-a529-9590-31e7-b0007b416f81> | 2011-03-17 17:48:04 +0000 |
commit | 2ade0863c3af14d274561cc7cb6e628bb9862761 (patch) | |
tree | 7bce68e35ceca05bedc6f831b9e0d24908deb5f5 /tests/DrawBitmapRectTest.cpp | |
parent | 6ecc33d794b5ddb088a6b0037c7a5969b8313806 (diff) |
abort drawing if srcRect is outside of the bitmap bounds
git-svn-id: http://skia.googlecode.com/svn/trunk@951 2bbb7eff-a529-9590-31e7-b0007b416f81
Diffstat (limited to 'tests/DrawBitmapRectTest.cpp')
-rw-r--r-- | tests/DrawBitmapRectTest.cpp | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/tests/DrawBitmapRectTest.cpp b/tests/DrawBitmapRectTest.cpp new file mode 100644 index 0000000000..fc382ce0d9 --- /dev/null +++ b/tests/DrawBitmapRectTest.cpp @@ -0,0 +1,47 @@ +#include "Test.h" +#include "SkBitmap.h" +#include "SkCanvas.h" + +static bool check_for_all_zeros(const SkBitmap& bm) { + SkAutoLockPixels alp(bm); + + size_t count = bm.width() * bm.bytesPerPixel(); + for (int y = 0; y < bm.height(); y++) { + const uint8_t* ptr = reinterpret_cast<const uint8_t*>(bm.getAddr(0, y)); + for (size_t i = 0; i < count; i++) { + if (ptr[i]) { + return false; + } + } + } + return true; +} + +static const int gWidth = 256; +static const int gHeight = 256; + +static void create(SkBitmap* bm, SkBitmap::Config config, SkColor color) { + bm->setConfig(config, gWidth, gHeight); + bm->allocPixels(); + bm->eraseColor(color); +} + +static void TestDrawBitmapRect(skiatest::Reporter* reporter) { + SkBitmap src, dst; + + create(&src, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF); + create(&dst, SkBitmap::kARGB_8888_Config, 0); + + SkCanvas canvas(dst); + + SkIRect srcR = { gWidth, 0, gWidth + 16, 16 }; + SkRect dstR = { 0, 0, SkIntToScalar(16), SkIntToScalar(16) }; + + canvas.drawBitmapRect(src, &srcR, dstR, NULL); + + // ensure that we draw nothing if srcR does not intersect the bitmap + REPORTER_ASSERT(reporter, check_for_all_zeros(dst)); +} + +#include "TestClassDef.h" +DEFINE_TESTCLASS("DrawBitmapRect", TestDrawBitmapRectClass, TestDrawBitmapRect) |