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Shape2D drawing will gracefully abort the VM on any out of bounds access.

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Marisa Kirisame 2019-07-12 15:40:29 +02:00 committed by Christoph Oelckers
parent b7e0a8d2c7
commit bdb083f457
1 changed files with 14 additions and 0 deletions
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14
src/rendering/2d/v_2ddrawer.cpp
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@ -412,6 +412,10 @@ void F2DDrawer::AddTexture(FTexture *img, DrawParms &parms)
void F2DDrawer::AddShape( FTexture *img, DShape2D *shape, DrawParms &parms )
{
// [MK] bail out if vertex/coord array sizes are mismatched
if ( shape->mVertices.Size() != shape->mCoords.Size() )
ThrowAbortException(X_OTHER, "Mismatch in vertex/coord count: %u != %u", shape->mVertices.Size(), shape->mCoords.Size());
if (parms.style.BlendOp == STYLEOP_None) return; // not supposed to be drawn.
PalEntry vertexcolor;
@ -464,7 +468,17 @@ void F2DDrawer::AddShape( FTexture *img, DShape2D *shape, DrawParms &parms )
dg.mIndexIndex = mIndices.Size();
dg.mIndexCount += shape->mIndices.Size();
for ( int i=0; i<int(shape->mIndices.Size()); i+=3 )
{
// [MK] bail out if any indices are out of bounds
for ( int j=0; j<3; j++ )
{
if ( shape->mIndices[i+j] < 0 )
ThrowAbortException(X_ARRAY_OUT_OF_BOUNDS, "Triangle %u index %u is negative: %i\n", i/3, j, shape->mIndices[i+j]);
if ( shape->mIndices[i+j] >= dg.mVertCount )
ThrowAbortException(X_ARRAY_OUT_OF_BOUNDS, "Triangle %u index %u: %u, max: %u\n", i/3, j, shape->mIndices[i+j], dg.mVertCount-1);
}
AddIndices(dg.mVertIndex, 3, shape->mIndices[i], shape->mIndices[i+1], shape->mIndices[i+2]);
}
AddCommand(&dg);
}