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Bug 1466001 - Index buffer must be non-null. - r=kvark

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MozReview-Commit-ID: ConbNwht4Pp
This commit is contained in:
Jeff Gilbert 2018-03-29 17:28:56 -07:00
parent dd2e67b482
commit 373a1ed449
1 changed files with 8 additions and 7 deletions
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15
dom/canvas/WebGLContextDraw.cpp
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@ -675,18 +675,19 @@ WebGLContext::DrawElements_check(const char* const funcName, const GLsizei rawIn
////
// Index fetching
const auto& indexBuffer = mBoundVertexArray->mElementArrayBuffer;
if (!indexBuffer) {
ErrorInvalidOperation("%s: Index buffer not bound.", funcName);
return false;
}
MOZ_ASSERT(!indexBuffer->IsBoundForTF(), "This should be impossible.");
if (!indexCount || !instanceCount) {
*out_lastVert = Nothing();
return true;
}
const auto& indexBuffer = mBoundVertexArray->mElementArrayBuffer;
size_t availBytes = 0;
if (indexBuffer) {
MOZ_ASSERT(!indexBuffer->IsBoundForTF(), "This should be impossible.");
availBytes = indexBuffer->ByteLength();
}
const size_t availBytes = indexBuffer->ByteLength();
const auto availIndices = AvailGroups(availBytes, byteOffset, bytesPerIndex,
bytesPerIndex);
if (indexCount > availIndices) {