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LibGfx: Use Checked<T> when creating new bitmaps

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This commit is contained in:
Andreas Kling 2020-04-15 16:55:07 +02:00
parent 9c54bad241
commit f3fc294ac8
Notes: sideshowbarker 2024-07-19 07:34:21 +09:00
1 changed files with 5 additions and 7 deletions

12
Libraries/LibGfx/Bitmap.cpp
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@ -24,6 +24,7 @@
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/Checked.h>
#include <AK/Memory.h>
#include <AK/SharedBuffer.h>
#include <AK/String.h>
@ -42,13 +43,10 @@ static bool size_would_overflow(BitmapFormat format, const Size& size)
{
if (size.width() < 0 || size.height() < 0)
return true;
size_t bpp = Bitmap::bpp_for_format(format);
size_t result = 0;
if (__builtin_mul_overflow((size_t)size.width(), (size_t)size.height(), &result))
return true;
if (__builtin_mul_overflow(result, bpp, &result))
return true;
return false;
Checked<size_t> size_in_bytes = static_cast<size_t>(size.width());
size_in_bytes *= size.height();
size_in_bytes *= Bitmap::bpp_for_format(format);
return size_in_bytes.has_overflow();
}
RefPtr<Bitmap> Bitmap::create(BitmapFormat format, const Size& size)