bool
TexUnpackSurface::Validate(WebGLContext* webgl, const char* funcName,
const webgl::PackingInfo& pi)
{
const auto& fullRows = mSurf->GetSize().height;
return ValidateUnpackPixels(webgl, funcName, fullRows, 0, this);
}
bool
TexUnpackImage::Validate(WebGLContext* webgl, const char* funcName,
const webgl::PackingInfo& pi)
{
if (!ValidatePIForDOM(webgl, funcName, pi))
return false;
const auto fullRows = mImage->GetSize().height;
return ValidateUnpackPixels(webgl, funcName, fullRows, 0, this);
}
static bool
ValidateUnpackBytes(WebGLContext* webgl, const char* funcName,
const webgl::PackingInfo& pi, size_t availByteCount,
webgl::TexUnpackBlob* blob)
{
if (!blob->mWidth || !blob->mHeight || !blob->mDepth)
return true;
const auto bytesPerPixel = webgl::BytesPerPixel(pi);
const auto bytesPerRow = CheckedUint32(blob->mRowLength) * bytesPerPixel;
const auto rowStride = RoundUpToMultipleOf(bytesPerRow, blob->mAlignment);
const auto fullRows = availByteCount / rowStride;
if (!fullRows.isValid()) {
webgl->ErrorOutOfMemory("%s: Unacceptable upload size calculated.", funcName);
return false;
}
const auto bodyBytes = fullRows.value() * rowStride.value();
const auto tailPixels = (availByteCount - bodyBytes) / bytesPerPixel;
return ValidateUnpackPixels(webgl, funcName, fullRows.value(), tailPixels, blob);
}
