diff options
Diffstat (limited to 'cc/resources/shared_bitmap.cc')
-rw-r--r-- | cc/resources/shared_bitmap.cc | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/cc/resources/shared_bitmap.cc b/cc/resources/shared_bitmap.cc index 3a6fc35..3b94d45 100644 --- a/cc/resources/shared_bitmap.cc +++ b/cc/resources/shared_bitmap.cc @@ -4,6 +4,9 @@ #include "cc/resources/shared_bitmap.h" +#include "base/numerics/safe_math.h" +#include "base/rand_util.h" + namespace cc { SharedBitmap::SharedBitmap( @@ -14,4 +17,26 @@ SharedBitmap::SharedBitmap( SharedBitmap::~SharedBitmap() { free_callback_.Run(this); } +// static +bool SharedBitmap::GetSizeInBytes(const gfx::Size& size, + size_t* size_in_bytes) { + if (size.width() <= 0 || size.height() <= 0) + return false; + base::CheckedNumeric<int> s = size.width(); + s *= size.height(); + s *= 4; + if (!s.IsValid()) + return false; + *size_in_bytes = s.ValueOrDie(); + return true; +} + +// static +SharedBitmapId SharedBitmap::GenerateId() { + SharedBitmapId id; + // Needs cryptographically-secure random numbers. + base::RandBytes(id.name, sizeof(id.name)); + return id; +} + } // namespace cc |