diff options
Diffstat (limited to 'src')
-rw-r--r-- | src/core/SkPictureShader.cpp | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/src/core/SkPictureShader.cpp b/src/core/SkPictureShader.cpp index 2a6aae5f4e..65a2cd3222 100644 --- a/src/core/SkPictureShader.cpp +++ b/src/core/SkPictureShader.cpp @@ -76,12 +76,21 @@ SkShader* SkPictureShader::refBitmapShader(const SkMatrix& matrix, const SkMatri } SkSize scaledSize = SkSize::Make(scale.x() * fTile.width(), scale.y() * fTile.height()); + // Clamp the tile size to about 16M pixels + static const SkScalar kMaxTileArea = 4096 * 4096; + SkScalar tileArea = SkScalarMul(scaledSize.width(), scaledSize.height()); + if (tileArea > kMaxTileArea) { + SkScalar clampScale = SkScalarSqrt(SkScalarDiv(kMaxTileArea, tileArea)); + scaledSize.set(SkScalarMul(scaledSize.width(), clampScale), + SkScalarMul(scaledSize.height(), clampScale)); + } + SkISize tileSize = scaledSize.toRound(); if (tileSize.isEmpty()) { return NULL; } - // The actual scale, compensating for rounding. + // The actual scale, compensating for rounding & clamping. SkSize tileScale = SkSize::Make(SkIntToScalar(tileSize.width()) / fTile.width(), SkIntToScalar(tileSize.height()) / fTile.height()); |