diff options
| -rw-r--r-- | src/gui/painting/qdrawhelper.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/gui/painting/qdrawhelper.cpp b/src/gui/painting/qdrawhelper.cpp index d6beb72..c5704fb 100644 --- a/src/gui/painting/qdrawhelper.cpp +++ b/src/gui/painting/qdrawhelper.cpp @@ -747,7 +747,6 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator * if (fdx <= fixed_scale && fdx > 0) { // scale up on X int disty = (fy & 0x0000ffff) >> 8; int idisty = 256 - disty; - int count = length * data->m11 + 2; int x = fx >> 16; // The idea is first to do the interpolation between the row s1 and the row s2 @@ -756,7 +755,9 @@ const uint * QT_FASTCALL fetchTransformedBilinear(uint *buffer, const Operator * // intermediate_buffer[0] is a buffer of red-blue component of the pixel, in the form 0x00RR00BB // intermediate_buffer[1] is the alpha-green component of the pixel, in the form 0x00AA00GG quint32 intermediate_buffer[2][buffer_size + 2]; - Q_ASSERT(length * data->m11 <= buffer_size); + // count is the size used in the intermediate_buffer. + int count = qCeil(length * data->m11) + 2; //+1 for the last pixel to interpolate with, and +1 for rounding errors. + Q_ASSERT(count <= buffer_size + 2); //length is supposed to be <= buffer_size and data->m11 < 1 in this case int f = 0; int lim = count; if (blendType == BlendTransformedBilinearTiled) { |